Clinical trial NCT01090765
Conditions: Prostate Cancer Metastatic Castrate Resistant Prostate Cancer
Keywords: Prostate Tumor Cancer Hormone Androgen Prostate Cancer
Sponsor: National Cancer Institute (NCI)
Start date: 2010-02-23; Completion date: 2015-04-17
Enrollment: 21 participants; Allocation: NON_RANDOMIZED; Intervention model: PARALLEL

Brief summary:
Background:

* Currently, there is no curative therapy for metastatic castrate-resistant prostate cancer (CRPC), a leading cause of death in men. However, researchers are exploring new treatments that involve drugs that prevent angiogenesis (the process by which new blood vessels are formed) and can slow or prevent tumor growth.
* TRC105 is an experimental drug that blocks angiogenesis, and has been studied for possible use in treating different kinds of cancer. However, it has not been validated to treat prostate cancer in general or CRPC in particular.

Objectives:

* To determine the effects of TRC105 as a treatment for CRPC
* To determine the safety and effectiveness of TRC105 in treating CRPC

Eligibility:

\- Men at least 18 years of age who have been diagnosed with castrate-resistant prostate cancer for which existing treatments have not been effective.

Design:

* Eligible individuals will have a series of blood and other tests to determine their suitability for participating in the study.
* Participants will receive intravenous infusions of TRC105 in a 28-day treatment cycle. Participants will receive i.v. (intravenous) infusions of TRC105 every two weeks on days 1 and 15 of each 28-day cycle (cohorts 1, 2, 3, 5, and 6) and every week on days 1, 8, 15, and 22 of each 28 day cycle (cohort 4).
* Participants will receive different doses of TRC105 depending on when they enter the study, up to a maximum tolerated dose or optimum treatment dose.
* Frequent blood and urine tests will be performed during treatment, as well as other tests of cancer progression as directed by the study doctors. Participants will receive medicines to help prevent possible adverse side effects of TRC105, such as allergic reaction to the drug.
* Participants will continue treatment with TRC105 until they or the study team decides that the medication is not beneficial. No additional testing will be required unless participants discontinue the treatment because of side effects (which the study doctors will follow until the side effects are resolved).

Detailed description:
Background:

\- Inhibition of angiogenesis has demonstrable antitumor efficacy against castrate-resistant prostate cancer (CRPC). TRC105 is a human/murine chimeric immunoglobulin heavy constant gamma 1 (IgG1) kappa monoclonal antibody that binds to human CD105 (endoglin), thus inhibiting angiogenesis and tumor growth. Data from an ongoing phase I clinical trial suggest that TRC105 is well tolerated with evidence of clinical efficacy in patients with metastatic CRPC.

Primary Objectives:

\- Define the maximum tolerable dose (MTD) of TRC105 given every one to two weeks.

Secondary Objectives:

* Define the dose-limiting toxicities and toxicity profile of TRC105 given every one to two weeks
* Evaluate time to disease progression, overall response rate and overall survival.
* Describe the prostate specific antigen (PSA) response rate to therapy with TRC105
* Characterize the pharmacokinetics of TRC105
* Demonstrate a biologic effect of TRC105 in the patient and, when possible, on the tumor via laboratory evaluation of the molecular markers of angiogenesis before and after drug administration respectively

Eligibility:

* Progressive, castrate-resistant, metastatic adenocarcinoma of the prostate
* Eastern Cooperative Oncology Group (ECOG) less than or equal to 2

Design:

\- An initial single-arm, phase I dose escalation study open to all patients with progressive metastatic CRPC. The study will evaluate patients in five cohorts of escalating dose levels. A maximum of 30 patients will be needed to complete the phase I evaluation.

Arms: arm 1: Intravenous infusion at 1 mg/kg every 2 weeks arm 2: Intravenous infusion at 3 mg/kg every 2 weeks arm 3: Intravenous infusion at 10 mg/kg every 2 weeks arm 4: Intravenous infusion at 10 mg/kg weekly arm 5: Intravenous infusion at 15 mg/kg every 2 weeks arm 6: Intravenous infusion at 20 mg/kg every 2 weeks
Interventions: intervention 1: TRC105
Intervention descriptions: intervention 1: None

Protocol documents:
Prot_ICF_000.pdf: 
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Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
1 
 
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A Phase I/II Study of TRC105 in Metastatic Castrate Resistant Prostate Cancer 
(CRPC) 
$EEUHYLDWHG7LWOH Ph I/II TRC105 in Prostate Ca 
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Medical Oncology Branch 
National Cancer Institute 
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William L. Dahut, MD 
Medical Oncology Branch 
National Cancer Institute 
Building 10, Room 3-2571 
10 Center Drive 
Bethesda, MD 20892 
301-496-4251 
FAX: 301-496-9020 
dahutw@mail.nih.gov 

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Fatima Karzai, MD
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Medical Oncology Branch 
National Cancer Institute 
Building 10, Room 12N226 
9000 Rockville Pike 
Bethesda, MD 20892 
301-496-4916 
karzaifh@mail.nih.gov  

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Seth Steinberg, PhD 
Biostatistics and Data Management Section  
National Cancer Institute 
 
6116 Executive Blvd, Room 702 
 
Bethesda, MD 20892  
301-496-9502 
Fax: 301-402-1259  
steinbes@mail.nih.gov 
 
 
6SRQVRU 
William L Dahut, MD, MOB/NCI 
IND 107424
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Tracon Pharmaceuticals, Inc 
 
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Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
2 
 

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Andrea Apolo, M.D., MOB/CCR/NCI  
William D. Figg, PharmD, MOB/CCR/NCI 
James Gulley, MD, Ph.D., LTIB/CCR/NCI 
Philip M. Arlen, MD, LTIB/CCR/NCI 
Ravi Madan, MD, LTIB/CCR/NCI 
Howard Parnes, MD, DCP/PUCR/NCI 
John Wright, MD, CTEP, NCI 
Jane Trepel, PhD, MOB, CCR, NCI 
Douglas K. Price, PhD CTB/CCR/NCI 
Peter Choyke, MD, CCR, MIP, NIH 
 
David Kohler, Pharm. D., PD/CCR/NIH 
Anna Couvillon, NP MOB/CCR/NCI 
Melony Beatson, RN, MOB/CCR/NCI 
Nancy Harold, RN, MOB/CCR/NCI 
 
Research Contact: 
Melony Beatson, RN MOB/CCR/NCI 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
3 
 
6&+(0$  (All times are approximated)  
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TRC105 will be administered intravenously every two weeks on days 1 and 15 of each 28 day 
cycle in Cohorts 1, 2, 3, 5, and 6 and every week on days 1, 8, 15, and 22 of each 28 day cycle in 
cohort 4.  In the phase I portion, doses will be escalated in six separate cohorts (see below).  No 
intra-patient dose escalation will be allowed. The maximum administered dose will be 20 mg/kg.   
 
Table 1:  Phase I Cohorts 
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1 
1 mg/kg every 2 weeks 
3-6 
2 
3 mg/kg every 2 weeks 
3-6 
3 
10 mg/kg every 2 weeks 
3-6 
4 
10 mg/kg weekly 
Up to six patients 
5 
15 mg/kg every 2 weeks 
3-6 
6 
20 mg/kg every 2 weeks 
3-6 
 
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TRC105 will be administered as an intravenous infusion at the 20 mg/kg every two weeks (the 
phase I MTD defined from the phase I portion) every 2 weeks (days 1 and 15) of each 28 (+/- 2 
days) day cycle.  
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Screening evaluation prior to C1D1: 
1. History and physical exam with vital signs (within 1 week prior to dosing) 
2. Laboratory evaluation (within 16 days) 
3. Scans (within 4 weeks prior to dosing): 
a. Technetium-99 bone scintigraphy  
b. CT scan of chest, abdomen and pelvis 
4. PSA (within 7 days prior to dosing) 
5. Electrocardiogram (within 16 days)  
 
Cycle 1 Day 1:  
1. Pharmacodynamic and pharmacokinetic studies to be drawn pre-dose  
2. Thirty minutes to 2 hours prior to the start of each TRC105 infusion, all patients will 
receive the following medications: 
a. Acetaminophen 650 mg PO x 1  


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
4 
 
b. Dexamethasone 20 mg IV x 1.  This dose may be tapered or discontinued if no 
infusion reaction occurs.  (See Section 4.3) 
c. Famotidine 20 mg i.v. (or similar H2 blocker) x 1 
d. Cetirizine 10 mg iv or po x1 (or similar oral or intravenous antihistamine)    
e. TRC105 IV over 4 hours 
3. Pharmacokinetic samples will be drawn following TRC105 infusion  
4. Laboratory evaluation (CBC and following  panels will be monitored every two weeks 
prior to each dose of TRC105 for as long as patient is being treated) 
a. CBC with differential and platelets will need to be repeated on cycle 1, day 1 
unless results are d 7 days from the start of treatment 
b. An acute care panel, hepatic panel, mineral panel, uric acid and total protein  will 
need to be repeated on cycle 1, day 1 unless results are d 7 days from the start of 
treatment 
c. INR if patient is on an anticoagulant  
Cycle 1 Day 2:  
1. Pharmacokinetic sample will be drawn (phase I) 
Cycle 1 Day 3:  
1. Pharmacokinetic sample will be drawn (phase I) 
Cycle 1 Day 15:  
1. Laboratory evaluation (CBC/differential, acute care panel, hepatic panel, mineral panel, 
uric acid and total protein, INR if patient is on an anticoagulant)  
2. TRC105  
3. Pharmacodynamic and pharmacokinetic studies will be drawn pre-dose on C1D15 
4. Post-dose pharmacokinetic  sample(s) will be drawn 
Cycle 1 Day 16:  
1. Pharmacokinetic sample will be drawn (phase I) 
Cycle 1 Day 17: 
1. Pharmacokinetic sample will be drawn (phase I) 
Cycle 2 Day 1:  
1. Laboratory evaluation (CBC/differential, acute care panel, hepatic panel, mineral panel, 
uric acid and total protein., INR if patient is on an anticoagulant)  
2. TRC105  
3. Pharmacokinetic sample pre-dose and post-infusion  
Cycle 2 Day 15:  
1. Laboratory evaluation (CBC/differential, acute care panel, hepatic panel, mineral panel, 
uric acid and total protein, INR if patient is on an anticoagulant)  
2. TRC105  
3. Pharmacodynamic studies will be drawn pre-dose on C2D15  


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
5 
 
4. Pharmacokinetic sample pre-dose and post-infusion  
Cycle 3 Day 1 and Cycle 3 Day 15: 
1. Pharmacokinetic sample pre-dose and post-infusion 
Prior to the start of every other cycle 
1. UPC to be performed prior to the start of every other cycle 
 
Re-staging bone scans and CT scan of chest, abdomen, and pelvis will be required every two 
months for the first four months of the study (following cycles two and four), and then after 
every 3 cycles of treatment.  If screening CT scan is negative for soft tissue disease, repeat CT 
imaging will not be required.  
 
Off study evaluation is to be performed within 30 days of withdrawal from study therapy. 



Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
6 
 
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x Inhibition of angiogenesis has demonstrable antitumor efficacy against castrate-resistant 
prostate cancer (CRPC). TRC105 is a human/murine chimeric IgG1 kappa monoclonal 
antibody that binds to human CD105 (endoglin), thus inhibiting angiogenesis and tumor 
growth. Data from an ongoing phase I clinical trial suggests that TRC105 is well 
tolerated with evidence of clinical efficacy in patients with metastatic CRPC.  
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x Define the maximum tolerable dose (MTD) of TRC105 given every one to two weeks. 
x Determine if single-agent TRC105, when administered at 20 mg/kg IV every two weeks 
(the phase I MTD) to patients with CRPC, is associated with a 6-month progression-free 
survival probability of 30%  
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x Define the dose-limiting toxicities and toxicity profile of TRC105 given every one to two 
weeks 
x Evaluate time to disease progression, overall response rate and overall survival.  
x Describe the prostate specific antigen (PSA) response rate to therapy with TRC105 
x Characterize the pharmacokinetics of TRC105  
x Demonstrate a biologic effect of TRC105 in the patient and, when possible, on the tumor 
via laboratory evaluation of the molecular markers of angiogenesis before and after drug 
administration respectively   
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x Progressive, castrate-resistant, metastatic adenocarcinoma of the prostate  
x (&2* 
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x An initial single-arm, phase I dose escalation study open to all patients with progressive 
metastatic CRPC. The study will evaluate patients in six cohorts of escalating dose levels. 
A maximum of 30 patients will be needed to complete the phase I evaluation. 
x Following completion of the phase I study will be a two-stage, phase II study that will be 
conducted separately in the following two arms: 
1. Chemotherapy-naïve for metastatic disease (no prior antiangiogenic therapy)  
2. Post-docetaxel disease progression  
x In each arm, the primary objective will be to determine if a 6 month progression free 
survival probability of 30.0% can be identified.  
x Initially, 12 patients will be enrolled in each stratum and evaluated for progression. If 2 
or more are progression-free at 6 months, then enrollment will continue until a full 35 
patients have been enrolled in that stratum. Enrollment may continue to the other stratum 
if one stratum has ended accrual.   


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
7 
 
TABLE OF CONTENTS 
SCHEMA ........................................................................................................................................ 3 
PRECIS ........................................................................................................................................... 6 
1 
OBJECTIVES ....................................................................................................................... 11 
1.1 
Primary ........................................................................................................................... 11 
1.2 
Secondary ....................................................................................................................... 11 
2 
BACKGROUND .................................................................................................................. 11 
2.1 
Castrate Resistant Prostate Cancer ................................................................................. 11 
2.2 
Rationale......................................................................................................................... 12 
2.3 
CD105 ............................................................................................................................ 13 
2.4 
TRC105 .......................................................................................................................... 14 
2.4.1 
Nonclinical Pharmacology, Efficacy and Toxicology ............................................ 14 
2.4.2 
TRC105 Clinical Safety, Pharmacokinetics and Efficacy ...................................... 19 
2.4.3 
TRC105 Physical, Chemical, and Pharmaceutical Properties and Formulation ..... 22 
3 
PATIENT SELECTION ....................................................................................................... 22 
3.1 
Eligibility Criteria .......................................................................................................... 22 
3.1.1 
Histopathological Confirmation.............................................................................. 22 
3.1.2 
Metastatic Progressive Castrate-Resistant Prostate Cancer .................................... 23 
3.1.3 
Prior Treatments...................................................................................................... 23 
3.1.4 
Age .......................................................................................................................... 23 
3.1.5 
Life Expectancy ...................................................................................................... 23 
3.1.6 
ECOG ...................................................................................................................... 23 
3.1.7 
Normal Organ and Marrow Function ..................................................................... 23 
3.1.8 
Acute Toxicity Recovery ........................................................................................ 24 
3.1.9 
Suppression of Testosterone Production ................................................................. 24 
3.1.10 
No Other Invasive Malignancies ............................................................................ 24 
3.1.11 
Adequate Contraception.......................................................................................... 24 
3.1.12 
Written Informed Consent ...................................................................................... 24 
3.1.13 
Steroids ................................................................................................................... 24 
3.1.14 
Anticoagulants ........................................................................................................ 24 
3.2 
Exclusion Criteria ........................................................................................................... 24 
3.2.1 
Prior Treatment ....................................................................................................... 24 
3.2.2 
Agents Not Approved by the FDA ......................................................................... 24 
3.2.3 
Brain Metastases ..................................................................................................... 25 
3.2.4 
Proteinuria ............................................................................................................... 25 
3.2.5 
Uncontrolled Intercurrent Illness ............................................................................ 25 
3.2.6 
Hemorrhage............................................................................................................. 25 
3.2.7 
History of Peptic Ulcer Disease or Gastritis ........................................................... 25 
3.2.8 
QTc ......................................................................................................................... 25 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
8 
 
3.2.9 
HIV Disease ............................................................................................................ 25 
3.2.10 
History of Hypersensitivity Reaction...................................................................... 25 
3.2.11 
History of Familial Bleeding Disorders .................................................................. 25 
3.2.12 
Hereditary Hemorrhagic Telangiectasia ................................................................. 25 
3.3 
Inclusion of Women and Minorities............................................................................... 25 
3.4 
Baseline Evaluation ........................................................................................................ 26 
3.4.1 
Imaging Studies ...................................................................................................... 26 
3.4.2 
Laboratory Evaluation ............................................................................................ 26 
3.4.3 
History and Physical Exam ..................................................................................... 26 
3.4.4 
EKG ........................................................................................................................ 26 
3.5 
Registration Procedures.................................................................................................. 26 
3.5.1 
On-Study Registration ............................................................................................ 26 
3.5.2 
Off-Study Procedure ............................................................................................... 26 
4 
TREATMENT PLAN ........................................................................................................... 27 
4.1 
Phase I Lead-In............................................................................................................... 27 
4.2 
Phase II ........................................................................................................................... 28 
4.3 
TRC105 Administration ................................................................................................. 29 
4.3.1 
Management of TRC105 Infusion Reactions ......................................................... 30 
4.3.2 
TRC105 Drug Accountability ................................................................................. 30 
4.4 
Concurrent Medications ................................................................................................. 31 
4.5 
Duration of Therapy ....................................................................................................... 31 
4.6 
Follow-up Criteria .......................................................................................................... 31 
4.7 
Off-Study Criteria .......................................................................................................... 31 
5 
DOSE LIMITING TOXICITIES .......................................................................................... 31 
6 
DOSING DELAYS AND DOSE MODIFICATIONS ......................................................... 32 
7 
SAFETY REPORTING REQUIREMENTS/DATA AND SAFETY MONITORING PLAN
 
36 
7.1 
Definitions ...................................................................................................................... 36 
7.1.1 
Adverse Event ......................................................................................................... 36 
7.1.2 
Suspected adverse reaction ..................................................................................... 36 
7.1.3 
Unexpected adverse reaction .................................................................................. 36 
7.1.4 
Serious..................................................................................................................... 37 
7.1.5 
Disability ................................................................................................................. 37 
7.1.6 
Life-threatening adverse drug experience ............................................................... 37 
7.1.7 
Protocol Deviation (NIH definition) ....................................................................... 37 
7.1.8 
Protocol Violation (NIH definition)........................................................................ 37 
7.1.9 
Unanticipated Problem............................................................................................ 37 
7.2 
NCI-IRB Reporting ........................................................................................................ 38 
7.2.1 
NCI-IRB Expedited Reporting of Adverse Events, Unanticipated Problems, and 
Deaths 38 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
9 
 
7.2.2 
NCI-IRB Requirements for PI Reporting of Adverse Events at Continuing Review
 
38 
7.2.3 
NCI-IRB Reporting of IND Safety Reports............................................................ 38 
7.3 
IND Sponsor Reporting Criteria .................................................................................... 38 
7.4 
Reported Adverse Events Related to TRC105 ............................................................... 38 
7.5 
FDA Reporting Criteria .................................................................................................. 39 
7.5.1 
IND Safety Reports to the FDA (Refer to 21 CFR 312.32).................................... 39 
7.5.2 
FDA Annual Reports (Refer to 21 CFR 312.33) .................................................... 39 
7.5.3 
Expedited Adverse Event Reporting Criteria to the IND Manufacturer (Tracon 
Pharmaceuticals, Inc.) ........................................................................................................... 39 
7.6 
Data and Safety Monitoring Plan ................................................................................... 40 
7.6.1 
Principal Investigator/Research Team .................................................................... 40 
7.6.2 
Sponsor Monitoring Plan ........................................................................................ 40 
8 
PHARMACEUTICAL INFORMATION ............................................................................. 41 
8.1 
Composition of TRC105 ................................................................................................ 41 
8.2 
TRC105 Packaging and Labeling .................................................................................. 41 
8.3 
TRC105 Storage and Shipping ....................................................................................... 42 
8.4 
TRC105 Preparation ....................................................................................................... 42 
8.5 
TRC105 Handling and Disposal .................................................................................... 42 
8.6 
Adverse Events ............................................................................................................... 43 
9 
CORRELATIVE/SPECIAL STUDIES ................................................................................ 43 
9.1 
Pharmacodynamic studies of TRC105 ........................................................................... 43 
9.1.1 
Background: ............................................................................................................ 43 
9.1.2 
Implementation: ...................................................................................................... 43 
9.1.3 
Pharmacodynamic assessment of circulating endothelial cells and immune subsets:
 
45 
9.2 
Pharmacokinetic Studies of TRC105 ............................................................................. 45 
9.3 
Imaging Studies .............................................................................................................. 46 
9.3.1 
Time Efficient Automatic Lesion Identification and Measurement on CT ............ 46 
10 STUDY CALENDAR .......................................................................................................... 48 
11 MEASUREMENT OF EFFECT ........................................................................................... 50 
11.1 
Response Criteria for Radiographic Studies ............................................................... 50 
11.1.1 
Measuring of Soft Tissue Disease........................................................................... 50 
11.1.2 
Confirmatory Measurement/Duration of Response ................................................ 52 
11.1.3 
Measurable Disease ................................................................................................ 53 
11.1.4 
Malignant Lymph Nodes ........................................................................................ 53 
11.1.5 
Non-Measurable Disease ........................................................................................ 53 
11.1.6 
Target Lesions ......................................................................................................... 53 
11.1.7 
Non-Target Lesions ................................................................................................ 54 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
10 
 
11.1.8 
Metastatic Bone Lesions ......................................................................................... 54 
11.1.9 
Clinical Lesions ...................................................................................................... 54 
11.1.10 
Guidelines for Evaluation of Measurable Disease .............................................. 54 
11.1.11 
Methods of Measurement .................................................................................... 54 
12 STATISTICAL CONSIDERATIONS .................................................................................. 54 
13 HUMAN SUBJECTS PROTECTIONS ............................................................................... 57 
13.1 
Rationale for Subject Selection .................................................................................. 57 
13.2 
Participation of Children ............................................................................................ 57 
13.3 
Evaluation of Benefits and Risks/Discomforts ........................................................... 57 
13.4 
Risks/Benefits Analysis .............................................................................................. 57 
13.5 
Consent and Assent Process and Documentation ....................................................... 57 
13.6 
Patient Records and Quality Assurance ...................................................................... 58 
14 APPENDIX A ....................................................................................................................... 59 
 
Tables 
Table 1:  Phase I Cohorts ................................................................................................................ 3 
Table 2:  Possibly Related Events ................................................................................................. 20 
Table 3:  Planned Dose Escalation ................................................................................................ 27 
Table 4:  Recommended Dexamethasone Taper Schedule ........................................................... 30 
Table 5:  Dose Escalation Table ................................................................................................... 32 
Table 6:  Hematologic Toxicities Dose Adjustment ..................................................................... 33 
Table 7:  Hematologic Toxicity Dose Adjustment ....................................................................... 34 
Table 8:  Non-Hematologic Toxicities Dose Adjustment............................................................. 35 
Table 9:  Proteinuria...................................................................................................................... 35 
Table 10:  Label Text Approval Form .......................................................................................... 41 
7DEOH%L:HHNO\'RVLQJ ......................................................................................................... 48 
7DEOH:HHNO\'RVLQJIRU3KDVH,&RKRUW2QO\ .................................................................. 49 
Table 13:  Evaluation of Best Overall Response .......................................................................... 51 
 
Figures 
Figure 1 ......................................................................................................................................... 17 
Figure 2 ......................................................................................................................................... 21 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
11 
 

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35,0$5<
3KDVH, 
x Define the maximum tolerable dose (MTD) of TRC105 given as an intravenous infusion 
every one to two weeks of each 28 day cycle that will be administered in the phase II 
portion of the study 
3KDVH,,
x Determine if single-agent TRC105, when administered at 20 mg/kg every 2 weeks, the 
MTD from phase I, to patients with castrate-resistant prostate cancer, is associated with a 
6-month progression-free survival probability of 30% in two separate strata of patients: 
R Those who are chemotherapy naïve for metastatic disease and have not received 
prior antiangiogenic therapy, and 
R Those with evidence of disease progression despite prior docetaxel.  
1.2
6(&21'$5< 
 
x Define the dose-limiting toxicities and toxicity profile associated with administration of 
TRC105 as an intravenous infusion given every one to two weeks 
x Evaluate time to disease progression, overall response rate and overall survival.  
Determination of progression will be based on clinical and radiographic criteria without 
the use of PSA, in accordance with recommendations from the Prostate Cancer Clinical 
Trials Working Group-2 [53]. Objective response and progression will be evaluated in 
this study using the new international criteria proposed by the Response Evaluation 
Criteria in Solid Tumors (RECIST) 1.1 
x Describe the prostate specific antigen (PSA) response rate to therapy with TRC105 
x Characterize the pharmacokinetics of TRC105 and determine if any pharmacodynamic 
relationships exist between plasma concentrations of TRC105 and clinical activity or 
toxicity 
x Demonstrate a biologic effect of TRC105 in the patient via measurement of plasma levels 
of angiogenic factors pre- and post TRC105 administration.  Angiogenic biomarkers to 
be evaluated include, soluble CD105 (sCD105), vascular endothelial growth factor 
(VEGF), placenta-derived growth factor (PlGF), basic fibroblast growth factor (bFGF), 
soluble VEGF receptor 1 (sVEGFR1), circulating endothelial progenitor cells (CEP) and 
mature circulating endothelial cells (CEC) and circulating tumor cells (CTC). 

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Prostatic adenocarcinoma is the leading non-cutaneous malignancy in American men, and the 
second leading cause of cancer related deaths in this population [2]. In 2009, it is estimated that 
just over 192,000 men will be diagnosed with prostate cancer and more than 27,000 will die as a 
result of metastatic disease [3]. With the onset of biochemical (PSA) or radiographic disease 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
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recurrence following definitive local therapy, androgen deprivation therapy (ADT) is the first-
line approach with the goal of achieving a castrate level of testosterone (< 50 ng/mL) [4, 5, 6]. 
Disease progression to a castration-resistant phenotype occurs in virtually all patients after a 
median of 18-36 months on ADT [7, 8]. Currently, there is no curative therapy for metastatic 
castrate-resistant prostate cancer (CRPC).  

5$7,21$/(
While there is no curative therapy for metastatic CRPC, two large randomized trials have 
established docetaxel with prednisone as the only cytotoxic therapy that improves overall 
survival in men with CRPC [8, 9], with a modest 2.9 month improvement in median overall 
survival compared to mitoxantrone with prednisone [10]. There remains a need to identify novel 
agents to be administered prior to docetaxel that would delay disease progression with less 
toxicity compared to traditional chemotherapy. Currently, there is no prospective data that 
defines the optimal timing of chemotherapy initiation in CRPC [11], and recent trials 
investigating experimental therapies have included chemotherapy-naïve, progressive metastatic 
castrate-resistant prostate cancer [12]. Furthermore, clinical responses induced by docetaxel are 
not durable and eventual progression of disease is inevitable [7], highlighting the need to 
continue to seek out agents that would be efficacious in the docetaxel-refractory setting. 
Angiogenesis is the fundamental process by which new blood vessels are formed. In 1971, 
Folkman proposed that tumor growth and metastasis are angiogenesis-dependent [13] and hence, 
blocking angiogenesis could be a strategy to arrest tumor growth [13,14,15]. It is now widely 
accepted that angiogenesis is required for the survival and growth of solid cancers (16, 17). It is 
generally believed that solid cancers grow in two phases, an avascular phase and a vascular 
phase (16). During the initial avascular phase, tumors exist as small aggregates of malignant cells 
supported by simple diffusion of oxygen and nutrients. The progressive growth of solid cancers 
beyond clinically occult sizes requires the continuous formation of new blood vessels, a process 
known as tumor angiogenesis. Tumor growth and metastasis are dependent upon angiogenesis. 
Subsequently, there have been numerous published papers that demonstrate an association 
between increasing microvessel density count, as a surrogate measure of angiogenesis, and 
metastasis in a range of solid tumors, including breast, lung, bladder and prostate cancer [18 - 
22]. Increased microvessel density has also been correlated with poorer prognosis for several 
solid malignancies, including prostate cancer [22]. 
Therapies that are directed against targets implicated in the development of tumor angiogenesis 
are attractive for many reasons. First, except for female reproduction and wound healing, 
angiogenesis in adults is generally part of a pathologic process such as tumor growth or 
choroidal neovascularization. Secondly, angiogenic targets are generally expressed in the plasma 
or on endothelial cells themselves. These targets are readily accessible to antibody treatments, in 
contrast to targets expressed within poorly vascularized tumors that may be difficult for 
antibodies to access. Thirdly, angiogenic targets on vascular endothelial cells are less prone to 
genetic mutation than targets expressed by genetically unstable cancer cells. As a result, 
development of resistance may be more predictable for agents that target endothelial cell 
functions than for those targeting cancer cells. 
Inhibition of angiogenesis, either as a stand-alone approach or in combination with 
chemotherapy, has demonstrable antitumor efficacy against castrate-resistant prostate cancer and 
there are several anti-angiogenic agents that are now in clinical trials in this population of 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
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13 
 
patients. The vast majority of anti-angiogenic agents being utilized in the clinical setting are 
based on strategies that either interfere with pro-angiogenic ligands or block signaling of pro-
angiogenic receptor tyrosine kinases. Thalidomide (D-1-[phthalimido]glutarimide) has been 
shown to inhibit basic fibroblast growth factor (bFGF) – induced angiogenesis in vitro [23, 24] 
and decrease levels of bFGF in vivo in prostate cancer patients [25]. An open-label phase II 
study of thalidomide in CRPC showed a total of 28% of the patients having a greater than 40% 
decline in PSA [25]. In a subsequent phase II trial of thalidomide plus docetaxel versus docetaxel 
alone in metastatic CRPC [26], the combination arm showed improvements in PSA response, 
median progression-free survival and median overall survival [26, 27]. At the NCI, a phase II 
trial using combination therapy with bevacizumab (a humanized monoclonal antibody against all 
major isoforms of VEGF-A), thalidomide, docetaxel and prednisone in patients with metastatic 
CRPC has resulted in a 90% biochemical response rate, overall response rate in measurable 
disease of 64% and a median overall survival rate of 28.4 months [28]. When considered in the 
context of historical data showing a median overall survival of 19.2 months with docetaxel and 
prednisone alone in patients with CRPC [10], this data suggests that the addition angiogenesis-
targeted agents would be beneficial in this patient population. While these studies validate the 
potential for an anti-angiogenic approach to CRPC, they also indicate the need to investigate 
alternative ways to target the tumor vasculature. Of particular interest are agents that target 
unique mechanisms for tumor angiogenesis, have a better risk-benefit profile, have activity in 
tumors resistant to existing therapies, and could even be combined with anti-VEGF therapy to 
enhance efficacy and limit the development of resistance.  
One such alternative anti-angiogenic approach is the direct targeting of the proliferating 
endothelial cell, a major component of the tumor vasculature, through modification of CD105 
signaling in response to transforming growth factor-ß (TGF-ß), induction of endothelial cell 
apoptosis, and antibody-mediated cellular cytotoxicity (ADCC) aimed against CD105.  

&'
CD105 (endoglin) is a 180 kDa homodimeric transmembrane protein that is selectively and 
highly expressed on the surface of proliferating vascular endothelial cells [29, 30, 31]. The 
CD105 pathway is essential for angiogenesis during fetal development and cell-surface 
expression of this molecule is required for the formation of new blood vessels [32]. This is 
evidenced by CD105 null mice that die in utero as a result of impaired angiogenesis in the yolk 
sac [32].  
CD105 acts as an accessory protein that interacts with the signaling receptor complex of the 
TGF- ß superfamily, thus modulating the effects of TGF- ß [33]. CD105 expression protects 
endothelial cells from the growth-inhibitory effects of TGF-ȕ signaling [34]. When engaged by 
the TGF- ß/TGF-ßRII complex, CD105 preferentially activates Alk-1 which in turn 
phosphorylates Smad proteins 1, 5 and 8. This ultimately leads to stimulatory effects on 
endothelial cell proliferation, migration and transcription of pro-angiogenic genes [34, 35, 36]. 
CD105 expression is induced by hypoxia through HIF-ĮDQGSURWHFWVK\SR[LFHQGRWKHOLDOFHOOV
from apoptosis [37]. Additionally, CD105 also regulates components of the extracellular matrix 
to facilitate endothelial cell migration and promote formation of neo-vessels [35]. 
Immunohistochemistry has shown that CD105 is strongly expressed in blood vessels of multiple 
tumor tissues, including prostate cancer [38, 39]. Increased intratumoral microvessel density 
(MVD), as assessed by anti-CD105 antibodies, correlates with Gleason score, tumor stage, 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
14 
 
metastasis, tumor cell proliferation index and shorter survival in prostate cancer [38, 39]. CD105 
is able to be detected in the urine and serum of patients with prostate cancer with higher levels of 
urinary CD105 present in biopsy-proven prostate cancer compared with biopsy-negative patients 
[40]. Anti-VEGF therapy up-regulates CD105 expression [41], indicating that a therapeutic 
strategy which targets CD105 may complement VEGF-inhibition.  
Mutations in CD105 or its downstream signaling mediator leading to haplotype insufficiency 
causes a well-described syndrome known as hereditary hemorrhagic telangiectasia type 1 (HHT-
1 or Osler-Weber-Rendu Syndrome). HHT-1 is a rare autosomal dominant genetic disorder 
characterized by vascular dysplasias, frequent episodes of epistaxis, mucocutaneous 
telangiectasias and arteriovenous malformations of the lung, brain, liver and gastrointestinal tract 
[30]. The genotype is manifested LQXWHUR, but the phenotype does not become apparent for many 
years following birth. Affected patients most commonly present with epistaxis in the second 
decade of life. The phenotype of this disorder is limited to vascular effects, indicating the 
specific role of CD105 in the vasculature. Most patients affected with HHT-1 experience 
epistaxis by the age of 10 to 20 years, while telangiectasias of the skin and mucosa first appear 
by the age of 20 to 40 years. Visceral arteriovenous malformations are less common sequelae but 
may result in significant morbidity, including pulmonary shunting and intracranial hemorrhage.  
CD105 is also expressed on pre-B leukemia cells, a subset of normal pre-B cells in fetal bone 
marrow, on erythroid precursors and stromal cells of fetal and adult bone marrow (42, 43, 44), 
syncytiotrophoblasts (45) and hematopoietic stem cells (46); however it is not expressed on 
normal peripheral blood lymphocytes or monocytes (47). In adults, CD105 expression can be 
measured on activated monocytes and endothelial cells, and expression levels on endothelial 
cells exceed those on activated monocytes by approximately 10-fold (48, 49). 

75&
All data cited in this section (unless otherwise noted) has been obtained from Tracon 
Pharmaceuticals, Inc and is found in the Tracon Pharma Investigator’s Brochure, Project 
TRC105 Oncology, version 2.0: May 11, 2009. Edition 2.0.  
TRC105 is a human/murine chimeric anti-CD105 IgG1 kappa monoclonal antibody consisting of 
KXPDQ&țDQG&ȖFRQVWDQWUHJLRQVZLWKPXULQH9țDQG9H regions. TRC105 is composed of 
two light chains of 213 amino acids and two heavy chains of 448 amino acids and has an 
approximate molecular weight of 148 kDa. This monoclonal antibody binds with high avidity to 
human CD105 (endoglin), thus inhibiting angiogenesis and tumor growth. 
 1RQFOLQLFDO3KDUPDFRORJ\(IILFDF\DQG7R[LFRORJ\
Pharmacology studies include LQ YLWUR and LQ YLYR studies performed with the murine parent 
antibody (SN6j) and TRC105. These antibodies share identical variable regions. SN6j, the 
murine parent monoclonal antibody of TRC105, was generated by immunizing mice with an 
isolated CD105 preparation from human leukemia cells (50). 
Pharmacology studies were conducted in murine and human models. Collectively, the studies 
demonstrate that TRC105 (or SN6j) binds with higher avidity to human than murine endothelial 
cells, and reacts more strongly with proliferating than quiescent endothelial cells. Studies also 
indicate that these anti-CD105 antibodies are able to mediate TGF-ȕ GHSHQGHQW JURZWK
inhibition, induce apoptosis of human umbilical vein endothelial cells (HUVECs), mediate 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
15 
 
antibody dependent cell-mediated cytotoxicity (ADCC) of HUVECs, saturate CD105 binding at 
FRQFHQWUDWLRQVȝJP/DQGLQKLELWWKHJURZWKRIKXPDQWXPRU[HQRJUDIWV 
TRC105 binds to purified human CD105 with high avidity by surface Plasmon resonance assay 
(5 - 35 pM). As expected, binding studies indicate that both SN6j and TRC105 bind with nearly 
identical avidity to human endothelial cells that express CD105 as determined by Scatchard 
analysis. 
,Q9LWUR3KDUPDFRORJ\RI61M
Using Scatchard plot analyses performed by incubating fixed combinations of radiolabeled and 
native antibody with KM-3 cells, the avidity of SN6j was calculated by regression analysis to be 
2.85 x 109 liter/mole (or 3.51 x 10-10 mole/liter). 
7*)ȕ'HSHQGHQW*URZWK,QKLELWLRQRI+89(&V
SN6j was studied for its ability to inhibit the growth of HUVECs LQYLWURin the presence of TGF- 
ȕ+89(&FHOOVZHUHFXOWXUHGDW&RYHUQLJKWSULRUWRWKHDGGLWLRQRI61MDQG7*)-ȕ&HOOV
were then exposed to antibody or TGF-ȕIRUKRXUVGXULQJZKLFKWLPHWKHPHGLDFRQWDLQLQJ
antibody and/or growth factors was replaced every 24 hours. Cell growth was then quantified by 
assaying tritiated thymidine incorporation for 20 hours. The concentration of SN6j needed to 
LQKLELW +89(& JURZWK E\  ZDV  ȝJ/mL in the absence of TGF-ȕ +RZHYHU WKH
concentration of SN6j needed to inhibit HUVEC growth by 50% was much lower when cells 
were incubated with antibody in the presence of TGF-ȕ7KHVHGDWDLQGLFDWHWKDWDQWL-endoglin 
antibody potently inhibits HUVEC growth in the presence of TGF-ȕ $W SK\VLRORJLF
concentrations of TGF-ȕ ! SJP/ WKH DPRXQW RI 61M QHHGHG WR LQKLELW +89(& FHOO
JURZWKZDVȝJP/ 
,QGXFWLRQRI$SRSWRVLVRI3UROLIHUDWLQJ+89(&V 
SN6j was studied for its ability to induce apoptosis of proliferating HUVECs LQYLWUR. HUVEC 
FHOOVZHUHVHHGHGDQGWKHQLQFXEDWHGDW&ZLWK61MRUȝJP/RUȝJRI023&
an IgG1-kappa isotype-matched control antibody. Following incubation, cells were washed and 
then lysed. The cytoplasmic and nuclear fractions were separated by centrifugation and 
nucleosomes contained in the cytoplasmic fraction were then detected via their histone 
components. Apoptosis was determined by assaying the fragmented nucleosome content of 
cytoplasmic fractions using a commercial ELISA (Roche Diagnostics). The degree of apoptosis 
LQGXFHGE\61MRQSUROLIHUDWLQJ+89(&VIURPPXOWLSOHGRQRUVZDVDWȝJP/DQG
DWȝJP/FRQFHQWUDWLRQVUHODWLYHWRWKHYDOXHLQGXFHG by camptothecin. Apoptosis of 
61MȝJP/WUHDWHG+89(&VZDVWLPHVDVODUJHDVWKDWRI023&FRQWURO,J*
ȝJP/WUHDWHG+89(&VZKLOHDSRSWRVLVRI61MȝJP/WUHDWHG+89(&VZDVWLPHV
DVODUJHDVWKDWRI023&FRQWURO,J*ȝJP/ treated HUVECs. 
In a separate experiment using HUVECs from a single donor, the degree of apoptosis induced by 
61M ZDV  DW  ȝJP/ DQG  DW  ȝJP/ FRQFHQWUDWLRQV UHODWLYH WR WKH YDOXH
LQGXFHGE\FDPSWRWKHFLQ$SRSWRVLVRI61MȝJP/WUeated HUVECs was 2.53 times as 
ODUJHDVWKDWRI023&FRQWURO,J*ȝJP/WUHDWHG+89(&VZKLOHDSRSWRVLVRI61M
ȝJP/WUHDWHG+89(&VZDVWLPHVDVODUJHDVWKDWRI023&FRQWURO,J*ȝJP/
treated HUVECs. Overall, SN6j induced significant levels of apoptosis (although lower than 
WKRVHLQGXFHGE\FDPSWRWKHFLQRQ+89(&VDWFRQFHQWUDWLRQVRIȝJP/ 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
16 
 
,Q9LWUR3KDUPDFRORJ\RI75&
The constant regions of SN6j were humanized to yield TRC105 for full-scale development and 
evaluation in clinical studies. TRC105 (c-SN6j) is a chimeric IgG1 kappa antibody made by 
grafting the constant regions of human IgG1 heavy chain and kappa light chain onto the murine 
variable regions of monoclonal antibody SN6j that binds human CD105. Using Scatchard plot 
analyses performed by incubating fixed combinations of radiolabeled and native antibody with 
KM-3 cells, the avidity of TRC105 (c-SN6j) was calculated by regression analysis to be 2.98 x 
109 liter/mole (or 3.36 x 10-10 mole/liter). 
$YLGLW\WR+XPDQ&'
A study of binding of TRC105 with human CD105 using a surface plasmon resonance assay 
indicated that avidity and affinity of TRC105 for human CD105 were approximately 5 x 10-12 
and 35 x 10-12 mole/liter, respectively. 
%LQGLQJ3RWHQF\WR+XPDQ&'
An ELISA assay was performed using plates coated with human CD105. TRC105 was found to 
half saturate human CD105 at concentrations of approximately 34-50 ng/mL and to fully saturate 
human CD105 at concentrationVRIQJP/75&FRQFHQWUDWLRQVRIQJP/DUH
expected to saturate CD105 expressed on human endothelial cells and fully engage effector 
functions. 
$YLGLW\RI75&WR+89(&V,Q9LWUR
A binding assay was performed to determine the avidity of TRC105 to cultured HUVECs. 
TRC105 was found to half saturate non-confluent (or proliferating) HUVECs at 2.3 ng/mL and 
to half saturate confluent (or non-proliferating) HUVECs at 22 ng/mL. Saturation was achieved 
at approximately 250 ng/mL in both cases.  
75&,QGXFWLRQRI$'&&RI3UROLIHUDWLQJ+89(&V,Q9LWUR
TRC105 was investigated for its ability to mediate antibody-dependent cell-mediated 
cytotoxicity (ADCC) LQ YLWUR. In the presence of effector cells from three different donors, 
FRQFHQWUDWLRQVRIȝJP/RI75&O\VHGVLJQLILFDQWSURSRUWLRQVRISUROLIHUDWLQJ+89(&V
indicating that TRC105 exhibits ADCC activity LQYLWURLower concentrations of TRC105 were 
evaluated for ADCC using HUVEC cells and peripheral blood mononuclear cells that were 
activated with interleukin-2 (see graph below). TRC105 concentrations of < 1 ng/mL lysed 
significant proportions of proliferating HUVECs in the presence of interleukin-2 activated NK 
cells at an effector to target ratio of 10:1. TRC105 did not engage complement-mediated 
cytotoxicity (CDC) on proliferating HUVECs in vitro. 
 
 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
17 
 
 
Figure 1 

,Q YLWUR analysis has shown that anti-CD105 antibodies are internalized following binding to 
CD105. SN6j and isotype-matched control IgG were individually labeled with FITC and then 
incubated with SVEC4-10 murine endothelial cells for four hours at room temperature. SN6j 
reacted with viable SVEC4-10 murine endothelial cells and was internalized into the cells as 
shown by strong FITC-SN6j staining within the intracellular portion of cells. In contrast, only 
weak background staining was seen with the cells treated with FITC-labeled isotype-matched 
control IgG. Internalization of bound TRC105 is expected to limit the ability of the antibody to 
engage effector functions at low CD105 surface densities, such as those on quiescent 
endothelium. 

,Q9LYR1RQFOLQLFDO7R[LFRORJ\6WXGLHVRI75&
75&7R[LFRORJ\
TRC105 was administered by intravenous infusion over 30 minutes weekly for 5 doses to 
cynomolgus monkeys, at doses of 3 mg/kg, 10 mg/kg and 30 mg/kg. Three monkeys of each 
gender were treated at the two lower doses and six animals of each gender were treated at the 
high dose (30 mg/kg). Animals tolerated TRC105 at all doses tested. There was no clinical, 
clinical pathologic or histopathologic evidence of toxicity. The no observed event level was 
determined to be 30 mg/kg given by 30 minute intravenous infusion weekly for five doses. 
A GLP repeat-dose toxicology study was undertaken in cynomolgus monkeys to determine the 
onset, reversibility, persistence, or delayed occurrence of toxic effects after five weekly doses of 
TRC105, 
followed 
by 
a 
four-week 
recovery 
period. 
Single-dose 
pharmacokinetic 
characterization of TRC105 was performed after Day 1 and multiple-dose pharmacokinetic 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
18 
 
characterization of TRC105 was performed after Day 29. In addition, the immunogenicity of 
TRC105 was determined. Doses were administered by a 30 minute infusion on days 1, 8, 15, 22 
and 29 into 36 adult monkeys. There were three males and three females per dose at 3 and 10 
mg/kg/dose and six males and six females at control (vehicle) and 30 mg/kg/dose. All animals 
were dosed on days 1, 8, 15, 22 and 29 via a 30 minute intravenous infusion. Three animals per 
sex per group in Groups 1 through 4 were euthanized on Day 30, and three animals per sex per 
group in Groups 1 and 4 were euthanized on Day 57. Toxicity was assessed by monitoring 
mortality, clinical condition, body weight, food consumption, ophthalmic examination results, 
electrocardiography (including heart rate), blood pressure, body temperature, respiratory rate, 
clinical pathology (hematology, coagulation, serum chemistry, urinalysis and fecal occult blood). 
All received a comprehensive necropsy; selected organs were weighed and tissues were 
evaluated microscopically. Survival, clinical condition, body weight, food consumption, 
ophthalmology examinations, physiologic parameters (electrocardiograms, blood pressure, body 
temperature, heart rate and respiratory rate), hematology and coagulation, clinical chemistry, 
urinalysis, fecal occult blood evaluations, organ weights, and macroscopic and microscopic 
findings were unaffected by TRC105 administration. Accordingly, the no observed effect level 
(NOEL) for intravenous TRC105 under the conditions of this study was 30 mg/kg. Tissue 
binding assays were conducted on selected tissues from the control and high-dose groups. 
Animals dosed with TRC105 demonstrated binding to endothelial cells consistent with 
internalization of bound antibody. While this staining pattern is consistent with CD105 
distribution, internalized antibody may also reflect binding to Fc receptors known to be 
expressed by endothelial cells. Roswell Park Cancer Institute sponsored a non-GLP study in 
which cynomolgus monkeys were dosed twice weekly for three weeks with 1.0 mg/kg, 3.0 
mg/kg or 10.0 mg/kg of TRC105 (c- SN6j). In summary, TRC105 was well-tolerated by 
nonhuman primates when dosed up to 30 mg/kg weekly for five doses as a 30 minute 
intravenous infusion in a GLP study or up to 10 mg/kg twice weekly for six doses as an 
intravenous bolus. The highest dose tested, 30 mg/kg weekly for five doses, produced no 
indications of a drug-related effect in a GLP study and is the NOEL. 
75&1RQFOLQLFDO3KDUPDFRNLQHWLFVDQG,PPXQRJHQLFLW\
Toxicokinetics and immunogenicity were studied following the administration of TRC105 by 
intravenous infusion over 30 minutes weekly for five doses to cynomolgus monkeys, at doses of 
3 mg/kg, 10 mg/kg and 30 mg/kg. The mean central distribution volume was 0.029, 0.040 and 
0.038 L/kg in animals given 3 mg/kg, 10 mg/kg and 30 mg/kg of TRC105, respectively, by 
intravenous infusion over 30 minutes. The mean steady-state volume of distribution was 0.075, 
0.087 and 0.076 L/kg in animals given 3 mg/kg, 10 mg/kg and 30 mg/kg of TRC105, 
respectively. As expected, the central volume of distribution for TRC105 was similar to the 
serum volume in monkeys. Both the central and steady-state distribution volumes were 
consistent with distribution volumes of other chimeric antibodies (e.g., rituximab and 
cetuximab). The mean terminal half-life of TRC105 was 133, 149 and 153 hours among the anti-
TRC105 antibody negative animals in the 3, 10, and 30 mg/kg dose groups, respectively. Steady-
state was attained by 5 weeks in each dose group. The mean serum TRC105 Cmax was 83, 135 
and 104 g/mL in the 3 mg/kg dose group on Study Days 1, 22 and 29, respectively. In the 10 
mg/kg dose group the mean Cmax values were 212, 346 and 306 g/mL, and were 834, 1113 
and 957 g/mL in the 30 mg/kg dose group on Study Days 1, 22, and 29, respectively. A single 
monkey dosed with 30 mg/kg of TRC105 tested positive for the formation of MACA (monkey 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
19 
 
anti-chimeric antibodies; i.e., antibodies reactive with the human portion of TRC105) on Study 
Days 36, 43, and 50, but not Study Day 57. All animals that tested negative for MAMA (monkey 
anti-murine antibodies; i.e., antibodies reactive with the murine portion of TRC105) before dose 
administration on Study Day 1 also tested negative when subsequent samples were obtained 
throughout the remainder of the study. Several other animals tested positive for MAMA prior to 
the first dose administration on Study Day 1 and also tested positive (at lower titers) at frequent 
times throughout the 57 day study period. 
75&1RQFOLQLFDO(IILFDF\
TRC105 was studied LQ YLYR for its ability to inhibit angiogenesis using a murine model of 
choroidal neovascularization (CNV). C57B/L6 mice were given an intravitreal injection of 
TRC105 in one eye and PBS in the contralateral eye. TRC105 demonstrated dose-dependent 
inhibition of CNV in C57B/L6 mice. The highest dose aGPLQLVWHUHG  ȝJ LQ ȝ/ LQKLELWHG
CNV by over 50% versus control. 
 75&&OLQLFDO6DIHW\3KDUPDFRNLQHWLFVDQG(IILFDF\
TRC105 is being studied in an ongoing monotherapy phase I trial in patients with advanced solid 
cancer.  To date, a total of 43 patients have been treated at escalating doses of 0.01, 0.03, 0.1, 
0.3, 1, 3, 10 and 15 mg/kg TRC105 every two weeks.  
75&&OLQLFDO6DIHW\
Grade 3/4 adverse events possibly related to TRC105 were reported in four patients including 
one patient with a grade 4 gastrointestinal bleed and three patients with grade 3 infusion 
reactions.  One patient with peptic ulcer disease had a gastric ulcer hemorrhage 4 days after the 
initial TRC105 infusion at 0.1 mg/kg that required transfusion of two units of packed red blood 
cells. This was the only serious bleeding event.  Three patients developed grade 3 TRC105 
infusion reactions at 0.3 and 1 mg/kg.  Because of this, the phase I protocol was modified to 
require dexamethasone-based premedication before each infusion. None of the ten patients that 
received 3 mg/kg, 10 mg/kg or 15 mg/kg every 2 weeks experienced grade 3 or higher infusion 
reactions.  Two patients, both at 10 mg/kg, experienced transient grade 2 infusion reactions that 
did not prevent them from receiving the prescribed dose.  Other adverse events considered 
possibly related to TRC105 have been rare and limited to grade 1 or 2. 
 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
20 
 
Table 2:  Possibly Related Events 
Possibly Related Events (N=41)
Adverse Event
Grade 1
Grade 2
Grade 3
Grade 4
Gastrointestinal hemorrhage
1
Infusion related reaction
5
3
Fatigue
1
3
Anemia
1
Blood bilirubin increased
1
Proteinuria
1
Flushing
2
Arthralgia
1
Constipation
1
Diarrhea
1
Headache
1
Hyperuricemia
1
Micturition urgency
1
Nausea
1
Vaginal hemorrhage
1
Vomiting
1
Diarrhea
1
Dysgeusia
1

 
75&3KDUPDFRNLQHWLFV
Serial TRC105 serum concentrations were measured in 24 patients at doses up to 10 mg/kg every 
two weeks.  TRC105 concentrations NQRZQ WR HQJDJH $'&& ! QJP/ were detected 
transiently in all patients, and concentrations that saturate &'UHFHSWRUV!QJP/were 
achieved at 0.3 mg/kg and higher.  The 200 ng/mL target concentration was maintained for 1 day 
at 1 mg/kg, 5 days at 3 mg/kg, and 7 days at 10 mg/kg.  Up to three additional cohorts will be 
studied in phase I including 15 mg/kg and 20 mg/kg every two weeks, and 10 mg/kg weekly. 
 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca
Version Date: 06-19-12 
21
75&&OLQLFDO3KDUPDFRNLQHWLFV1 
1
10
100
1,000
10,000
100,000
1,000,000
0
24
48
72
96
120
144
168
TRC105 Concentration (ng/mL)
Time (hrs)
10 mg/kg
3 mg/kg
1 mg/kg
0.3 mg/kg
Maximum Effect Target
ADCC Target
 
Figure 2 
75&,PPXQRJHQLFLW\
Thirty-nine patients have been evaluated for HAMA as part of the ongoing Phase 1 monotherapy 
trial.  HAMA was detected in one patient at 0.03 mg/kg after 10 doses of TRC105 and one 
patient at 0.3 mg/kg after 6 doses of TRC105 that was produced in NS0 cells. Neither HAMA 
nor HACA were detected in patients dosed with the CHO-derived TRC105 supply that will be 
used in this study and for future development. 
75&&OLQLFDO(IILFDF\
Early evidence of clinical activity includes stable disease for greater than two months in 13 of 35 
evaluable patients (37%), with stable disease for greater than four months in 4 of those patients 
(11%).  One patient with castrate-refractory prostate cancer remains on study after 34 cycles 
(136 weeks) of TRC105 with a complete PSA response and bone scan normalization, and one 
ovarian cancer patient was treated for 6 cycles (24 weeks) with stable disease and CA125 
decrease of 16%.  In addition, decreases in circulating tumor markers were seen in 6 of 20 
patients (30%) with available markers. 
5HVXOWVIURP3KDVH,SRUWLRQRIFXUUHQWWULDO
Enrollment on the phase I portion of this study has been completed as of Amendment M.  Twenty 
patients have been enrolled, with two patients remaining on the sixth cohort (20 mg/kg every 2 
weeks). PSA declines were seen in a total of 7 patients. 
One patient in cohort 2 (3 mg/kg every 2 weeks) had a PSA decline of 6%.  In cohort 3, (10 
mg/kg every 2 weeks), two patients had PSA declines of 50% and 17%, while in cohort 4 (10 
mg/kg weekly), PSA declines were seen in two patients (20% and 59% respectively).  In cohort 
5, (15 mg/kg every two weeks), one patient had a PSA decline of 41%.  Lastly, in cohort 6, one 
patient had PSA decline of 19%.  In the first 5 cohorts, 13 patients had soft tissue disease and 9 
patients had stable disease status post two cycles of treatment.   


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
22 
 
One patient in cohort 5 (15 mg/kg IV every two weeks) experienced a grade-4 infusion reaction.  
This serious adverse event (SAE) was the only dose-limiting toxicity to occur on the protocol as 
of Amendment M.    In addition to this adverse event there was one occurrence of grade 3 fever 
and three occurrences of grade 3 hypotension considered to be possibly related to TRC105.  
Other AEs were limited to grade 1 or grade 2 in severity, the most frequent being headache 
(13/20), epistaxis (9/20), fever (8/20), nausea (7/20), flushing (7/20), anemia (6/20), chills (5/20),   
vomiting (5/20), infusion related reaction (4/20), bone pain (4/20), oral hemorrhage (4/20). 
 75&3K\VLFDO&KHPLFDODQG3KDUPDFHXWLFDO3URSHUWLHVDQG)RUPXODWLRQ
3K\VLFDO&KHPLFDODQG3KDUPDFHXWLFDO3URSHUWLHV
TRC105 is a chimeric anti-C' ,J* DQWLERG\ FRQVLVWLQJ RI KXPDQ &ț DQG &Ȗ FRQVWDQW
UHJLRQVZLWKPXULQH9țDQG9+UHJLRQV75&LVFRPSRVHGRIWZROLJKWFKDLQVRIDPLQR
acids and two heavy chains of 448 amino acids and has an approximate molecular weight of 148 
kDa.
)RUPXODWLRQ
TRC105 is a sterile, clear colorless to slightly yellow opalescent solution for intravenous 
infusion. The solution may contain small amounts of visible particulates. TRC105 will be filtered 
WKURXJK D  ȝP ORZ SURWHLQ ELQGLQJ ILOWHU DW WKH FOLQLFDO VLte prior to administration. Each 
single-use vial contains a 5 mg/mL solution. TRC105 is formulated as a preservative-free 
solution containing sodium chloride, monobasic sodium phosphate monohydrate, anhydrous 
dibasic sodium phosphate, and Sterile Water for Injection. Hydrochloric acid and/or sodium 
hydroxide may be added to adjust the pH. TRC105 is formulated to be isotonic with a pH of 6.2 
– 8.2. 
6WRUDJH&RQGLWLRQV
75&VKRXOGEHVWRUHGUHIULJHUDWHG&WR&)WR)3UHSDUDWLRQVRI75&Ln 
infusion containers are stable for up to 8 hours at room temperature. 
0DQXIDFWXULQJ3URFHVV
The TRC105 production cell line for initial phase I clinical testing was a NS0 cell line. The 
manufacturing process used bioreactors with media containing bovine sera from the US or New 
Zealand. A high producing CHO cell line was subsequently developed for phase I and later stage 
clinical development using media that is free of animal-derived components. The manufacturing 
process uses conventional purification and filtration steps and concludes with the formulation of 
TRC105 in phosphate buffered saline. The purity of TRC105 is greater than 95%.  Only CHO 
derived material will be used in this study. 

3$7,(176(/(&7,21

(/,*,%,/,7<&5,7(5,$
 +LVWRSDWKRORJLFDO&RQILUPDWLRQ
Patients must have histopathological confirmation of prostate cancer by the Laboratory of 
Pathology of the NCI, Pathology Department of the National Naval Medical Center or Pathology 
Department of Walter Reed Army Medical Center prior to entering this study.  Patients whose 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
23 
 
pathology specimens are no longer available may be enrolled in the trial if the patient has a 
clinical course consistent with prostate cancer and available documentation from an outside 
pathology laboratory of the diagnosis.  In cases where original tissue blocks or archival biopsy 
material is available, efforts will be made to contact referring physicians and outside pathology 
departments to have the material forwarded to the research team for use in correlative studies.  
 0HWDVWDWLF3URJUHVVLYH&DVWUDWH5HVLVWDQW3URVWDWH&DQFHU
Patients must have metastatic progressive castrate-resistant prostate cancer defined as 
progressive disease (see below) despite surgical castration or ongoing use of gonadotropin-
releasing hormone agonists with confirmed castrate levels of testosterone. 
Criteria of progression for trial eligibility are defined from the Prostate Cancer Clinical Trials 
Working Group-2 [53]. Clinically progressive prostate cancer must be evidenced and 
documented by any of the following parameters: 
1.  Two consecutively rising PSA values at a minimum of 1-week intervals (2.0 
ng/mL is the minimum starting value for PSA) 
2.  Appearance of one or more new lesions on bone scans 
3.  Progressive measurable disease by RECIST 1.1 
Patients on flutamide for at least 6 months must have disease progression at least 4 weeks after 
withdrawal.  Patients on bicalutamide or nilutamide for at least 6 months must have progression 
at least 6 weeks after withdrawal.   
All patients enrolled will be required to have measurable or non-measurable disease on imaging 
studies. 
 3ULRU7UHDWPHQWV
Phase II study patients enrolled onto Arm 1 (chemotherapy-naïve) may not have received any 
prior chemotherapy or antiangiogenic therapy for metastatic prostate cancer. Those patients 
enrolled onto Arm 2 must have evidence of disease progression (per criteria stated above) despite 
prior docetaxel. Any number of prior treatment lines is acceptable. 
 $JH
$JH!\HDUV 
 /LIH([SHFWDQF\
Life expectancy of greater than 3 months. 
 (&2*
ECOG performance status 0-2 (see Appendix A) 
 1RUPDO2UJDQDQG0DUURZ)XQFWLRQ
Patients must have normal organ and marrow function as defined below: 
x Absolute neutrophil count !1,500/mcL 
x Platelets !100,000/mcL 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
24 
 
x Total bilirubin   1.5 x upper normal limits or < 3 mg/dl in subjects with Gilbert’s 
Syndrome   
x AST/ALT d 2.5 × upper limit of normal 
x &UHDWLQLQH[XSSHUQRUPDOOLPLWV25FUHDWLQLQHFOHDUDQFH!40 mL/min/1.73 m2 for 
patients with creatinine levels above institutional normal, as calculated by the Cockcroft 
Gault formula. 
 $FXWH7R[LFLW\5HFRYHU\
Patients must have recovered from any acute toxicity related to prior therapy, includingsurgery. 
Toxicity should be < grade 1 or returned to baseline. 
 6XSSUHVVLRQRI7HVWRVWHURQH3URGXFWLRQ
All patients who have not undergone bilateral surgical castration must continue suppression of 
testosterone production by appropriate usage of GnRH agonists or antagonists. 
 1R2WKHU,QYDVLYH0DOLJQDQFLHV
Patients must not have other invasive malignancies (within the past 2 years with the exception of 
non-melanoma skin cancers or non-invasive bladder cancer). 
 $GHTXDWH&RQWUDFHSWLRQ
Enrolled patients must agree to use adequate contraception (hormonal or barrier method of birth 
control; abstinence) prior to study entry, the duration of study participation and 3 months after 
the end of the treatment.  
 :ULWWHQ,QIRUPHG&RQVHQW
Patient must be able to understand and willing to sign a written informed consent document. 
 6WHURLGV
Patients on a stable dose of steroids of 10 mg/day or less can continue on steroids if they are on 
peptic ulcer disease prophylaxis with an H2-blocker or proton pump inhibitor 
 $QWLFRDJXODQWV
Patients on an anticoagulant can be enrolled as long as the INR does not exceed 3. 

(;&/86,21&5,7(5,$
 3ULRU7UHDWPHQW
Patients who have had chemotherapy, large field radiotherapy, or major surgery must wait 3 
weeks prior to entering the study. 
 $JHQWV1RW$SSURYHGE\WKH)'$
Patients may not be receiving any agents not approved by the FDA within the past 4 weeks. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
25 
 
 %UDLQ0HWDVWDVHV
Patients with known brain metastases will be excluded from this clinical trial because of their 
poor prognosis and because they often develop progressive neurologic dysfunction that would 
confound the evaluation of neurologic and other adverse events. 
 3URWHLQXULD
Proteinuria, as demonstrated by a 24 hour protein of t 2000 mg. Urine protein will be screened 
by urine protein-FUHDWLQLQHUDWLR83&)RU83&UDWLR!D-hour urine protein will need to 
be obtained and the level should be < 2000 mg for patient enrollment. 
 8QFRQWUROOHG,QWHUFXUUHQW,OOQHVV
8QFRQWUROOHGLQWHUFXUUHQWLOOQHVVLQFOXGLQJEXWQRWOLPLWHGWRK\SHUWHQVLRQV\VWROLF%3!
GLDVWROLF%3!RQJRLQJRUDFWLYHV\VWHPLFLQIHFWLRQV\PSWRPDWLFFRQJHVWLYHKHDUWIDLOXUH
unstable angina pectoris, cardiac arrhythmia or psychiatric illness/social situations that would 
limit compliance with study requirements.  
 +HPRUUKDJH
Hemorrhage within 30 days of dosing 
 +LVWRU\RI3HSWLF8OFHU'LVHDVHRU*DVWULWLV
History of peptic ulcer disease or gastritis within 6 months of TRC105 administration, unless 
patient has received adequate treatment for peptic ulcer disease and has evidence of complete 
resolution documented by EGD  
 47F
 47F!PVHF 
 +,9'LVHDVH
Known HIV-positive patients are excluded  
 +LVWRU\RI+\SHUVHQVLWLYLW\5HDFWLRQ
History of hypersensitivity reaction to human or mouse antibody products 
 +LVWRU\RI)DPLOLDO%OHHGLQJ'LVRUGHUV
Patients with a history of familial bleeding disorders.   
 +HUHGLWDU\+HPRUUKDJLF7HODQJLHFWDVLD
Patients with a history of hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu syndrome) 

,1&/86,212):20(1$1'0,125,7,(6
Men of all races and ethnic groups are eligible for this trial.  Women are excluded by the nature 
of the disease. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
26 
 

%$6(/,1((9$/8$7,21
 ,PDJLQJ6WXGLHV
Imaging studies (baseline – obtained within one month prior to enrollment):  
x Technetium 99 Bone Scintigraphy 
x CT scan of chest, abdomen and pelvis 
 /DERUDWRU\(YDOXDWLRQ
Laboratory evaluation (baseline – obtained within 16 days prior to dosing) 
x Hematological profile: CBC with differential and platelet count, PT, aPTT, fibrinogen. 
x Biochemical profile: electrolytes, BUN, creatinine, urine protein-creatinine ratio (UPC), 
AST, ALT, total  bilirubin, calcium, phosphorus, albumin, magnesium, uric acid, 
albumin, amylase and testosterone level.  This is to be ordered as an acute care panel, 
hepatic panel, mineral panel, uric acid and total protein.   
x Tumor marker profile: PSA (baseline – within 7 days prior to dosing) 
x CTC (baseline and at week 12) 
x FcGRIII (baseline) 
x INR if patient is on an anticoagulant 
 +LVWRU\DQG3K\VLFDO([DP
History and physical exam with vital signs within 1 week prior to dosing. 
 (.*
Electrocardiogram (baseline – obtained within 16 days prior to dosing)

5(*,675$7,21352&('85(6
 2Q6WXG\5HJLVWUDWLRQ
Authorized staff must register an eligible candidate with NCI Central Registration Office (CRO) 
within 24 hours of signing consent. A registration Eligibility Checklist from the web site 
(http://intranet.cancer.gov/ccr/welcome.htm) must be completed and faxed to 301-480-0757. 
After confirmation of eligibility at Central Registration Office, CRO staff will call pharmacy to 
advise them of the acceptance of the patient on the protocol prior to the release of any 
investigational agents. Verification of Registration will be forwarded electronically via e-mail. 
Please note, it is very important for all registrars to acquire encrypted e-mail from NIH Help 
Desk, since the verification of registration includes patient’s information. A recorder is available 
during non-working hours. 
 2II6WXG\3URFHGXUH
Authorized staff must notify Central Registration Office (CRO) when a patient is taken off-
study. An off-study form from the web site (http://intranet.cancer.gov/ccr/welcome.htm) main 
page must be completed and faxed to 301-480-0757. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
27 
 

75($70(173/$1

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The primary objective of this phase I lead-in is to define the maximum tolerable dose (MTD) of 
TRC105, given as an intravenous infusion on day 1 and day 15 or days 1, 8, 15, and 22 (+/- 2 
days) of each 28 day cycle, to be administered in the phase II portion of the study.  
This open-label, non-randomized, dose-finding evaluation of TRC105 will be conducted in all 
patients with progressive metastatic castrate resistant prostate cancer. Escalating doses of 
TRC105, based on a modified Fibonacci scheme [51], will be given intravenously every 2 
weeks, on days 1 and 15 for Cohorts 1, 2, 3, 5, and 6 or weekly on days 1, 8, 15 and 22 of each 
28 day cycle for Cohort 4 . Intra-patient dose escalation will not be permitted. The starting dose 
of TRC105 will be 0.3 mg/kg (one dose level below the highest level studied to date). The 
maximal potential TRC105 dose that will be studied in this trial is 20 mg/kg. The starting dose 
for TRC105 was based on preliminary results from the ongoing phase I trial and toxicology 
studies in nonhuman primates. In preclinical studies in cynomolgus monkeys, the no observed 
event level (NOEL), at which there was no clinical, clinical pathologic or histopathologic 
evidence of toxicity was determined to be 30 mg/kg given by 30 minute intravenous infusion 
weekly for five doses. This NOEL of 30 mg/kg in monkeys dosed weekly for five doses in an 
intravenous toxicity study is twice the maximum clinical dose of 20 mg/kg.  
The planned dose escalation schedule is as follows: 
Table 3:  Planned Dose Escalation 
Cohort 
Phase I Dose 
Planned Number of Patients 
1 
1.0 mg/kg every 2 weeks 
3-6 
2 
3 mg/kg every 2 weeks 
3-6 
3 
10 mg/kg every 2 weeks 
3-6 
4 
10 mg/kg weekly 
Up to Six Patients 
5 
15 mg/kg every two weeks 
3-6 
6 
20 mg/kg every two weeks  
3-6 
Each cohort in the phase I portion of the study is planned to have at least 3 patients to evaluate 
for toxicity,   with the exception of cohort 4. Once amendment F is approved by the NCI 
Institutional Review Board, enrollment will proceed directly to cohort 5.  Existing patients in 
Cohort 4 will continue to be treated weekly. Three patients will be treated at a given dose level 
and observed for acute toxicity for one course of treatment before any more patients are entered. 
If none of the three patients at a given dose level experience dose-limiting toxicity (DLT), 
defined as any grade 3 or higher hematologic (excluding anemia) or non-hematologic toxicity 
considered to be possibly related to TRC105, then the next cohort of three patients will be 
enrolled at the next higher dose. Toxicities will be graded using the CTEP Active Version of the 
NCI Common Terminology Criteria for Adverse Events (CTCAE). If two or more of the three 
patients experience DLT that is considered to be at least possibly related to TRC105, then three 
more patients are treated at the next lower dose unless six patients have already been treated at 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
28 
 
that dose. If one of three patients treated at a dose experiences DLT that is considered to be at 
least possibly related to TRC105, then three more patients are enrolled at that same level. If the 
incidence of DLT among those six patients is one in six, then the next cohort of three patients is 
treated at the next higher dose. In general, if two or more of the six patients treated at a dose 
level experience DLT, then the MTD is considered to have been exceeded, and three more 
patients are treated at the next lower dose as described above [51]. The MTD is defined as the 
highest dose studied for which the incidence of DLT was less than 33% [51]. For MTD 
determination, dose-limiting toxicities will be evaluated throughout the first 28 days of treatment 
(Cycle 1). Patients who exit the study for reasons other than drug-related toxicity prior to 
completion of the 28-day DLT evaluation period will be replaced to ensure an adequate safety 
assessment of each cohort.  If at the first dose level more than one DLT is observed in the first 
three subjects, or more than two DLTs in six subjects are observed, the study will be stopped. 

3+$6(,,
Patients in phase II will receive a TRC 105 dose of 20 mg/kg on day 1 and day15 (± 2 days) of 
each 28 day dosing cycle as determined in the phase I portion of this study.  Patients in this 
portion of the study will be stratified in to two arms as described below.  
Two treatment arms (strata): 
1. Chemotherapy-naïve (including no prior antiangiogenic therapy)  
2. Post-docetaxel disease progression  
This phase II portion of the study is an open-label, two-stage, two-arm design. Patients will be 
treated with TRC105 as an intravenous infusion at 20 mg/kg every two weeks of each 28 day 
cycle. In both phases of this trial, patients will be treated with TRC105 until progressive disease 
(as defined below) or intolerable toxicity. Subjects enrolled onto this study will all have evidence 
of disease progression despite castrate levels of testosterone, and will then be stratified into two 
arms, either chemotherapy-naïve or chemotherapy-refractory. This is in order to allow for an 
adequate number of patients to be enrolled such that the impact of TRC105 in each stratum can 
be assessed independently. The primary objective of this phase II study is to determine if single-
agent TRC105, when administered at 20 mg/kg every two weeks to patients with castrate-
resistant prostate cancer, is associated with a 6-month progression-free survival probability of 
30% in two separate strata of patients: those who are chemotherapy naïve and those who are 
chemotherapy-refractory with evidence of disease progression despite prior docetaxel. The 
primary endpoint for both strata of patients is progression-free survival (PFS) per radiologic and 
clinical criteria. PSA increases will not be used to determine progression.  
Advanced prostate cancer is characterized by a poor ability to measure response due to 
immeasurable bone-only metastases [52]. Because of the uncertainties associated with assessing 
response in bone and the controversy surrounding the clinical significance of post-therapy 
changes in PSA, the Prostate Cancer Working Group (PCWG)-2 [53] recommends that phase II 
trials focus on a clinically relevant improvement in time to progression as a means of providing 
the most useful way to assess whether to proceed from a phase II to a phase III trial [53]. Time-
to-event end points, with an emphasis on PFS as a composite endpoint constituted by 
radiological or symptomatic progression, are currently recommended by the Prostate Cancer 
Working Group-2 guidelines [53]. According to a retrospective analysis by Halabi et al [54], 
composite PFS appears to be a useful intermediate surrogate for overall survival.  


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
29 
 
In this phase I/II trial, radiographic progression is defined as the first occurrence of either two 
distinct new lesions on bone scan or progression of measurable disease by RECIST criteria [1]. 
Regarding metastatic bone and soft tissue lesions, new lesions seen by the end of cycle 2 or 
before cycle 3 (after the first re-staging evaluation) may represent disease that was not detected 
on the pre-study scan, and a confirmatory scan will be required at the next scheduled re-staging 
evaluation unless clinically not indicated. This is consistent with recommendations of the 
Prostate Cancer Clinical Trials Working Group-2 [53]. For more information, please refer to 
sections 11.1.6 and 11.1.8. Objective response and progression will be evaluated in this study 
using the new international criteria proposed by the Response Evaluation Criteria in Solid 
Tumors (RECIST) Committee [Eisenhauer EA, et al. New response evaluation criteria in solid 
tumors: Revised RECIST guideline (version 1.1) 2009; Eur J Ca 45:228-247]. Clinical 
progression is defined as any bone-related event (pathologic fracture, spinal cord compression, 
need for palliative radiation, surgery or kyphoplasty to any neoplastic bone lesion) or a 
deterioration of performance status, typically to an ECOG score of greater than two. The 
utilization of composite PFS as a primary endpoint, and the definition of progression as noted 
above, is consistent with prior trials performed both at the NCI and in the extramural setting [52, 
55] as well as the current recommendations from the Prostate Cancer Clinical Trials Working 
Group-2 [53].  

75&$'0,1,675$7,21
At the outset of the study, the patient may be admitted to the inpatient service for a period of 
approximately 24 hours to complete research studies including PK measurements. Otherwise, 
treatment will be administered on an outpatient basis. Reported adverse events (AEs) and 
potential risks are described in Section 2.4.2.  Appropriate dose modifications for TRC105 are 
described in Section 6.  No investigational or commercial agents or therapies other than those 
described below may be administered with the intent to treat the patient’s malignancy. 
Pre-medications are to be given approximately 30 minutes to two hours prior to the start of each 
TRC administration: 
x Acetaminophen 650 mg PO x 1  
x Dexamethasone 20 mg IV x 1 (see below for tapering schedule)  
x Famotidine 20 mg iv (or similar H2 blocker) x1  
x Cetirizine 10 mg i.v. or p.o. x1 (or similar oral or intravenous antihistamine) 
Thirty minutes after completing pre-medications, TRC105 will be administered intravenously 
utilizing an infusion pump.  TRC105 must be administered using a low protein binding, non-
DEHP infusion set with a 0.2 micron downstream filter.  The attachment of the infusion pump 
administration set to the IV bag and transport of the study drug to the patient will be performed 
as per standard study site procedures.   
On Cycle 1 Day 1, TRC105 will be infused over a period of four hours.  For patients who 
complete one 4 hour infusion without the development of infusion reaction, the subsequent 
TRC105 infusion may be reduced to 2 hours. For patients who complete one 2 hour infusion 
without the development of infusion reaction, subsequent TRC105 infusions may be reduced to 1 
hour.  The TRC105 infusion must be given over at least 1 hour.   


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
30 
 
After the minimum TRC105 infusion duration of 1 hour has been safely administered, the 
dexamethasone should be gradually tapered as tolerated with each subsequent infusion and 
eventually discontinued if possible (see below table).  The dexamethasone dose should not be 
reduced unless the prior infusion was well-tolerated (no infusion reaction of any grade).   
 
Table 4:  Recommended Dexamethasone Taper Schedule 
,QIXVLRQ
'H[DPHWKDVRQH'RVHDQG6FKHGXOH
First 1 hr infusion 
20 mg i.v. 30 minutes  to 2 hours prior to each infusion 
Second 1 hr infusion 
10 mg i.v. 30 minutes to 2 hours prior to each infusion 
Third 1 hr infusion 
5 mg IV 30 minutes to 2 hours prior to each infusion 
Subsequent infusions 
No dexamethasone  
aThe dexamethasone dose should not be reduced unless the prior infusion was well-tolerated (no 
infusion reaction of any grade).   
Patient with infusion related events of any grade should be managed appropriately. The 
immediate next dose should be infused at the same infusion rate.  If tolerated, subsequent doses 
may be decreased per protocol.  Patients who experience a grade 3 or higher hypersensitivity 
reaction will be taken off study. Each infusion of TRC105 must be completed within 8 hours of 
reconstitution. The dose level and infusion start and stop times must be recorded in the source 
documents. 
 0DQDJHPHQWRI75&,QIXVLRQ5HDFWLRQV
If a patient experiences a grade 2, 3 or 4 adverse reaction during infusion, the infusion should be 
stopped and the patient treated accordingly. Antipyretic, antihistamine and other therapies should 
be administered as indicated.  If appropriate, the infusion may be restarted at half of the previous 
rate when the patient is able to continue.  Infusion reactions will be recorded as AEs in the case 
report form. Interventions should be documented as concomitant medications or concomitant 
treatments as appropriate. 
 75&'UXJ$FFRXQWDELOLW\
The Investigator must maintain an accurate accounting of TRC105 supplied by TRACON.  
During the study, the following information must be recorded: 
x Date of receipt, quantity and identification of the study drug received from TRACON 
x ID number of the patient to whom the product is dispensed 
x The date(s) and quantity of the product dispensed 
x Dates and quantity of product returned, lost or accidentally or deliberately destroyed 
Investigational Drug Accountability Logs should be maintained by the site and must be readily 
available for inspection. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
31 
 

&21&855(170(',&$7,216
Non-steroidal anti-inflammatory drugs (NSAIDS) are allowed while on protocol therapy.  
However, all patients who receive NSAIDS should also receive peptic ulcer disease prophylaxis 
with an H2 or proton pump inhibitor. 

'85$7,212)7+(5$3<
In the absence of treatment delays due to adverse event(s), treatment may continue until one of 
the following criteria applies: 
x Progressive disease as defined in Section 11.0, 
x Intercurrent illness that prevents further administration of treatment, 
x Unacceptable adverse event(s) 
x Patient decides to withdraw from treatment 
x General or specific changes in the patient’s condition render the patient unacceptable for 
further treatment in the judgment of the investigator. 

)2//2:83&5,7(5,$
x All study subjects will be followed for overall survival only once active treatment has 
been completed (as indicated above). 
x Follow-up will be annual telephone contact to assess survival status. Every attempt will 
be made to contact patient/subject including: contacting referring physician, contacting 
emergency contact patient identified on admission, checking SSDI (Social Security Death 
Index) 

2))678'<&5,7(5,$
x Patient choice 
x Voluntary withdrawal of consent to participate in the study or the follow up period. 
x Grade 4 non-hematologic toxicity or intolerable, persistent toxicity following two 
successive dose reductions as outlined in section 6 
x Patient noncompliance with the study. 
x Patient death 

'26(/,0,7,1*72;,&,7,(6
The NCI Common Terminology Criteria for Adverse Events (CTCAE) version 4.0 will be 
utilized for AE reporting and determination of DLT. A copy of the CTCAE version 4.0 can be 
downloaded from the CTEP website at http://ctep.cancer.gov.  All appropriate treatment areas 
should have access to a copy of the CTCAE version 4.0. 
Dose limiting toxicities (DLTs) are defined as any grade 3 or higher hematologic (excluding 
anemia) or non-hematologic toxicity considered to be possibly related to TRC105. Anemia will 
not be considered as a DLT. Three patients should have completed at least 1 cycle of therapy 
prior to considering dose escalation in the next cohort of patients, with the exception of cohort 4. 
Once amendment F has been IRB approved, enrollment will proceed directly to cohort 5. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
32 
 
Determination of DLT for the purpose of dose escalation enrollment will be based on toxicities 
observed in the first 28 days of treatment (cycle 1) and must be considered as at least possibly 
related to study drug. Evaluation for toxicity will continue throughout the study and should dose 
limiting toxicities occur beyond the cycle one, consideration will be given to halting the dose 
escalation and re-evaluating lower dose levels.  
Infusion reactions that are allergic or vaso vagal in nature will not require that the dose level 
below is expanded. 
Table 5:  Dose Escalation Table 
 
If !2 patients experience a DLT at any dose level, at any time in the Phase I study, then 
subsequent patients will be enrolled at the next lower dose level. 

'26,1*'(/$<6$1''26(02',),&$7,216
Toxicities will be graded using the NCI Common Terminology Criteria for Adverse Events 
(CTCAE) version 4.0. A copy of the CTCAE version 4.0 can be   downloaded from the CTEP 
website at: http://ctep.cancer.gov. 
All appropriate treatment areas should have access to a copy of the CTCAE version 4.0. 
 
1XPEHU
RI
3DWLHQWV
ZLWK'/7
DWD*LYHQ'RVH/HYHO

(VFDODWLRQ'HFLVLRQ5XOH

0 out of 3 
 
Enter 3 patients at the next dose level 
 
! 2 
 
Dose escalation will be stopped.  This dose level will be declared the maximally 
administered dose (highest dose administered).  Three (3) additional patients will 
be entered at the next lowest dose level if only 3 patients were treated previously 
at that dose. 
 
1 out of 3 
 
Enter at least 3 more patients at this dose level. 
If 0 of these 3 patients experience DLT, proceed to the next dose level. 
If 1 or more of this group suffer DLT, then dose escalation is stopped, and this 
dose is declared the maximally administered dose.  Three (3) additional patients 
will be entered at the next lowest dose level if only 3 patients were treated 
previously at that dose. 
 
<1 out of 6 at highest 
dose level below the 
maximally administered 
dose 
 
This is generally the recommended phase 2 dose.  At least 6 patients must be 
entered at the recommended phase 2 dose. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
33 
 
As this trial allows patients to receive treatment indefinitely, patients may have the dose of 
TRC105 temporarily withheld and potentially resume treatment as long as they do not fulfill the 
off-study criteria outlined in section 4.6  
Dose reductions and dose interruptions will be allowed during both the phase 1 and 2 portions of 
this study.  Patients who experience a DLT that is at least possibly related to TRC105 will have 
their dose held until the toxicities have resolved as outlined in the tables and text below. For 
selected DLTs, upon re-initiation of treatment with TRC105, patients will have their dose 
reduced to the next lower dose level.  No dose reductions below 0.3 mg/kg will be allowed. 
Patients will be removed from the study if dose-limiting toxicity does not resolve as outlined in 
the tables and text below within 28 days.  
The following adjustments will only apply if the toxicities reported are attributed by the 
investigators to be at least possibly related to TRC105 
Dose Adjustment based on hematologic toxicities 
Table 6:  Hematologic Toxicities Dose Adjustment 
7R[LFLW\
'RVH$GMXVWPHQW
Grade 0, 1, 2 neutropenia 
No action 
Grade 
3 
neutropenia 
without 
concomitant fever 
Hold TRC105 until ANC t 1000  
Check weekly CBC/differential 
May resume treatment at current dose level 
Grade 3 neutropenia with concomitant 
fever (temperature t 38.5oC) 
Hold TRC105 until ANC t 1000 
Check weekly CBC/differential 
All subsequent cycles at next lower dose level 
Grade 4 neutropenia without fever 
Hold TRC105 until ANC t 1000 
Check weekly CBC/differential 
All subsequent cycles at next lower dose level 
 
Additional management steps to be followed are based on whether the patient had received 
growth factor support during the cycle in which grade 4 neutropenia was documented.  
For those patients with grade 4 neutropenia not already supported by pegfilgrastrim, the 
following guidelines apply: 
1. Hold TRC105 until A1&DVQRWHGDERYH 
2. Consider administration of filgrastrim once grade 4 neutropenia is noted, with duration of 
growth factor support to be determined by physician discretion.  
3. 2QFH$1&75&PD\EHUH-started at next lower dose level 
4. Subsequent cycles of treatment may be accompanied by administration of pegfilgrastrim  


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
34 
 
 
For those patients who experience grade 4 neutropenia in a cycle during which prophylactic 
growth factor support was administered, the following guidelines apply: 
1. 2QFH$1&, re-start TRC105 at next lower dose level   
2. Continue administration of prophylactic pegfilgrastrim unless, at physician discretion, 
there is justification to withhold. 
 
Dose adjustment based on hematologic toxicities 
Table 7:  Hematologic Toxicity Dose Adjustment 
7R[LFLW\
'RVH$GMXVWPHQW
Grade 0, 1 thrombocytopenia 
No action 
Grade 2, 3 thrombocytopenia without 
bleeding 
Hold treatment until  
platelet count t 75,000 
May resume at current dose level 
Grade 
3 
thrombocytopenia 
with 
bleeding 
Hold treatment until  
platelet count t 75,000 
All subsequent cycles at next lower dose level 
Grade 4 thrombocytopenia 
Hold treatment until  
platelet count t 75,000 
All subsequent cycles at next lower dose level 
 
Grade 1 Toxicity  
Treatment with TRC105 need not be interrupted. For symptoms that last more than 7 days and 
have been found to be intolerable to the patient, the dose of TRC105 may be reduced to the next 
lower dose level.  
Grade 2 Non-Hematologic Toxicity 
For nausea, vomiting and diarrhea, maintain dosing with symptomatic treatment. Patients who 
have a subjective intolerable grade 2 event may have a dose interruption. Re-initiation of 
TRC105 at the same dose is allowed if and when the adverse event resolves to grade 1 or 
baseline; dose reduction is not required.   For persistent nausea, vomiting or diarrhea despite 
symptomatic treatment that remains unacceptable (intolerable) to the patient, reduce dose of 
TRC105 to the next lower dose level. For any grade 2 toxicity, the dose need not be reduced 
unless side effects become intolerable to the patient. Patients with intolerable or limiting toxicity 
after two successive dose reductions will be removed from the study. Electrocardiogram 
evaluation will be performed as clinically indicated 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
35 
 
Grade 3 Non-Hematologic Toxicity  
Hold TRC105 and re-evaluate at least bi-ZHHNO\XQWLOWR[LFLW\LPSURYHVWRJUDGHRUSUH-
treatment baseline. Reduce dose of TRC105 by one dose level. Treatment will be discontinued in 
patients who experience grade 3 non-hematologic toxicities that do not resolve to grade 1 or 
baseline within 4 weeks. Hypokalemia and hypomagnesemia that can be corrected within 48 
hours to grade 2 or less will not require a dose reduction.  
 
Dose Adjustment based on non-hematologic toxicities 
Table 8:  Non-Hematologic Toxicities Dose Adjustment 
7R[LFLW\
'RVH$GMXVWPHQW
Grade 0, 1, 2 
No action 
Grade 3 non-hematologic toxicity 
(except 
untreated 
nausea 
and 
vomiting) 
Hold treatment until d grade 1 or pre-treatment 
baseline 
All subsequent cycles at next lower dose level 
Grade 4 Non-hematologic Toxicity  
Patients with clinical grade 4 non-hematologic toxicity thought to be at least possibly related to 
the IND will be taken off treatment. 
Patients with intolerable or limiting toxicity following two successive dose reductions will be 
removed from study.  
Unacceptable toxicities that have not resolved at time of “off treatment” must be followed until 
stabilization or resolution.  
Proteinuria 
Proteinuria, as demonstrated by a 24 hour protein of t 2000 mg. Urine protein will be screened 
by urine protein-creatinine ratio (UPC). 
Table 9:  Proteinuria 
3URWHLQXULD

[Proteinuria should be monitored by urine analysis for urine protein 
creatinine (UPC) ratio prior to every other cycle of TRC105] 
UPC ratio  
< 3.5 
Continue TRC105 
UPC ratio  
! 3.5 
Hold TRC105 until it UPC recovers to < 3.5.   
Grade 
4 
or 
nephrotic syndrome 
Discontinue TRC105. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
36 
 

6$)(7< 5(3257,1* 5(48,5(0(176'$7$ $1' 6$)(7< 021,725,1*
3/$1
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 $GYHUVH(YHQW
An adverse event is defined as any reaction, side effect, or untoward event that occurs during the 
course of the clinical trial associated with the use of a drug in humans, whether or not the event 
is considered related to the treatment or clinically significant. For this study, AEs will include 
events reported by the patient, as well as clinically significant abnormal findings on physical 
examination or laboratory evaluation. A new illness, symptom, sign or clinically significant 
laboratory abnormality or worsening of a pre-existing condition or abnormality is considered an 
AE.  All AEs must be recorded on the AE case report form with the exception of grade 1 events 
occurring in the Phase II portion of the protocol. 
All AEs, including clinically significant abnormal findings on laboratory evaluations, regardless 
of severity, will be followed until satisfactory resolution. AEs should be reported up to 30 days 
following the last dose of study drug.  AEs that are considered treatment related, expected, 
continuing, but not resolvable by 30 days after treatment completion (e.g., alopecia) will not be 
followed after the 30-day period.  
An abnormal laboratory value will be considered an AE if the laboratory abnormality is 
characterized by any of the following: 
x Results in discontinuation from the study 
x Is associated with clinical signs or symptoms  
x Requires treatment or any other therapeutic intervention 
x Is associated with death or another serious adverse event, including hospitalization.  
x Is judged by the Investigator to be of significant clinical impact 
x If any abnormal laboratory result is considered clinically significant, the investigator will 
provide details about the action taken with respect to the test drug and about the patient’s 
outcome. 
 6XVSHFWHGDGYHUVHUHDFWLRQ
Suspected adverse reaction means any adverse event for which there is a reasonable possibility 
that the drug caused the adverse event. For the purposes of IND safety reporting, ‘reasonable 
possibility’ means there is evidence to suggest a causal relationship between the drug and the 
adverse event. A suspected adverse reaction implies a lesser degree of certainty about causality 
than adverse reaction, which means any adverse event caused by a drug. 
 8QH[SHFWHGDGYHUVHUHDFWLRQ
An adverse event or suspected adverse reaction is considered “unexpected” if it is not listed in 
the investigator brochure or is not listed at the specificity or severity that has been observed; or, 
if an investigator brochure is not required or available, is not consistent with the risk information 
described in the general investigational plan or elsewhere in the current application. 
"Unexpected”, also refers to adverse events or suspected adverse reactions that are mentioned in 
the investigator brochure as occurring with a class of drugs or as anticipated from the 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
37 
 
pharmacological properties of the drug, but are not specifically mentioned as occurring with the 
particular drug under investigation. 
 6HULRXV
An adverse event or suspected adverse reaction is considered serious if in the view of the 
investigator or the sponsor, it results in any of the following: 
x Death, 
x A life-threatening adverse drug experience 
x Inpatient hospitalization or prolongation of existing hospitalization 
x Persistent or significant incapacity or substantial disruption of the ability to conduct 
normal life functions 
x A congenital anomaly/birth defect. 
x Important medical events that may not result in death, be life-threatening, or require 
hospitalization may be considered a serious adverse drug experience when, based upon 
appropriate medical judgment, they may jeopardize the patient or subject and may require 
medical or surgical intervention to prevent one of the outcomes listed in this definition. 
 'LVDELOLW\
A substantial disruption of a person’s ability to conduct normal life functions. 
 /LIHWKUHDWHQLQJDGYHUVHGUXJH[SHULHQFH
Any adverse event or suspected adverse reaction that places the patient or subject, in the view of 
the investigator or sponsor, at immediate risk of death from the reaction as it occurred, i.e., it 
does not include a reaction that had it occurred in a more severe form, might have caused death. 
 3URWRFRO'HYLDWLRQ1,+GHILQLWLRQ
A protocol deviation is any change, divergence, or departure from the study design or procedures 
of a research protocol that is under the investigator’s control and that has not been approved by 
the IRB.  
 3URWRFRO9LRODWLRQ1,+GHILQLWLRQ
Any change, divergence, or departure from the study procedures in an IRB-approved research 
protocol that has a major impact on the subject’s rights, safety, or well-being and/or the 
completeness, accuracy or reliability of the study data. 
 8QDQWLFLSDWHG3UREOHP
Any incident, experience, or outcome that: 
x Is unexpected in terms of nature, severity, or frequency in relation to:  
(a) the research risks that are described in the IRB-approved research protocol and 
informed consent document; Investigator’s Brochure or other study documents, and 
(b) the characteristics of the subject population being studied; AND 
x Is related or possibly related to participation in the research; AND 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
38 
 
x Places subjects or others at a gUHDWHU ULVN RI KDUP (including physical, psychological, 
economic, or social harm) than was previously known or recognized. 

1&,,5%5(3257,1*
 1&,,5%([SHGLWHG5HSRUWLQJRI$GYHUVH(YHQWV8QDQWLFLSDWHG3UREOHPVDQG'HDWKV
The Protocol PI will report to the NCI-IRB: 
x All unexpected serious adverse events that are possibly, probably, or definitely related to 
the research  
x All deaths, except deaths due to progressive disease  
x All Protocol Violations or Deviations 
x All Unanticipated Problems 
Reports must be received by the NCI-IRB within 7 working days of PI awareness via iRIS. 
 1&,,5%5HTXLUHPHQWVIRU3,5HSRUWLQJRI$GYHUVH(YHQWVDW&RQWLQXLQJ5HYLHZ
The protocol PI will report to the NCI-IRB:  
x All Grade 2 unexpected events that are possibly, probably or definitely related to the 
research;  
x All Grade 3 and 4 events that are possibly, probably or definitely related to the research;  
x All Grade 5 events regardless of attribution;  
x All Serious Events regardless of attribution.  
NOTE: Grade 1 events are not required to be reported.  
 1&,,5%5HSRUWLQJRI,1'6DIHW\5HSRUWV
Only IND Safety Reports that require a sponsor recommended change to the protocol or the 
consent form or in the opinion of the PI increases risks to study participants will need to be 
reported to the NCI IRB. 

,1'63216255(3257,1*&5,7(5,$
An investigator must immediately report to the sponsor any serious adverse event, whether or not 
considered drug related, including those listed in the protocol or investigator brochure and must 
include an assessment of whether there is a reasonable possibility that the drug caused the event.  
Study endpoints that are serious adverse events (e.g. all-cause mortality) must be reported in 
accordance with the protocol unless there is evidence suggesting a causal relationship between 
the drug and the event (e.g. death from anaphylaxis).  In that case, the investigator must 
immediately report the death to the sponsor. 

5(3257('$'9(56((9(1765(/$7('7275&
Clinical safety experience is based on data from 43 subjects with advanced incurable solid 
tumors treated with escalating doses of TRC105 in the phase I clinical study 105ST101 and 20 
subjects in the phase I portion of the current study, NCI 10C0062. 
x BLOOD/BONE MARROW – anemia 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
39 
 
x CONSTITUTIONAL SYMPTOMS – fatigue, fever, chills, flushing, dysgeusia 
x GASTROINTESTINAL – diarrhea, nausea, vomiting 
x RENAL – proteinuria  
x PAIN – arthralgia 
x VASCULAR – Gastrointestinal hemorrhage, oral hemorrhage, hypotension 
x LABORATORY – hyperuricemia 
x NERVOUS SYSTEM – headache 
x RESPIRATORY, THORACIC, MEDIASTINAL – epistaxis 
x GENERAL DISORDERS AND ADMINISTRATION SITE CONDITIONS – infusion 
related reaction 

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 ,1'6DIHW\5HSRUWVWRWKH)'$5HIHUWR&)5
 Expedited reporting to the FDA 
The Sponsor will notify FDA  via phone, fax, or email of any unexpected fatal or life-threatening
suspected adverse reactions as soon as possible but no later than 7 calendar days of initial receipt 
of the information. This will be followed with a written report within 15 days using the 
MedWatch Form 3500a.  
 
The study Sponsor will notify FDA in writing of any suspected adverse reaction that is both 
serious and unexpectedas soon as possible but no later than 15 calendar days after initial receipt 
of the information using the MedWatch Form 3500a. If FDA requests any additional data or 
information, the sponsor must submit it to the FDA as soon as possible, but no later than 15 
calendars days after receiving the request.  
The study Sponsor will also report expeditiously as above: 
x any findings from clinical, epidemiological, or pooled analysis of multiple studies or any 
findings from animal or in vitro testing that suggest a significant risk in humans exposed 
to the drug 
x clinical important increase in the rate of a serious suspected adverse reaction over that 
listed in the protocol or investigator brochure.  
 )'$$QQXDO5HSRUWV5HIHUWR&)5
The study Sponsor will submit a brief report annually of the progress of the trial within 60 days 
of the anniversary date that the IND went into effect as indicated in 21CFR 312.33, and any 
associated FDA correspondences regarding the IND annual report.  
 ([SHGLWHG$GYHUVH(YHQW5HSRUWLQJ&ULWHULDWRWKH,1'0DQXIDFWXUHU7UDFRQ
3KDUPDFHXWLFDOV,QF
x The study IND holder will notify TRACON in a written IND Safety Report 
(MedWatch, Form 3500A) of any XQH[SHFWHG fatal or life threatening experience 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
40 
 
associated with the use of TRC105 as soon as possible but in no event later than 7 
calendar days of initial receipt of the information.  
x The IND holder will also notify TRACON in a written IND Safety Report 
(MedWatch, Form 3500A)  of any serious adverse events DVVRFLDWHGwith the use of 
TRC105 that is both VHULRXVand XQH[SHFWHGas soon as possible and in no event later 
than 15 calendar days after initial receipt of the information. 
x SAEs that do not require expedited reporting to the FDA will be reported to 
TRACON quarterly in the form of a spreadsheet generated from the CCR C3D Oracle 
Clinical database. 

'$7$$1'6$)(7<021,725,1*3/$1
 3ULQFLSDO,QYHVWLJDWRU5HVHDUFK7HDP
A safety monitoring committee made up of the Principal Investigator, William L. Dahut, M.D., a 
Lead Associate Investigator, David E. Adelberg, M.D. and Research Nurse Ann Pierpoint, R.N., 
will review the events of every patient on the protocol every week. Follow-up of both on-going 
and previously treated patients and the reported adverse events in a given week will be reviewed 
(i.e., adverse events, protocol adherence, tumor responses, and potential new patient eligibilities). 
Decisions about dose level enrollment and dose escalation if applicable will be made based on 
the toxicity data from prior patients.  
All data will be collected in a timely manner and reviewed by the principal investigator or a lead 
associate investigator. Adverse events will be reported as required above. Any safety concerns, 
new information that might affect either the ethical and or scientific conduct of the trial, or 
protocol deviations and violations will be immediately reported to the IRB using iRIS and if 
applicable to the Sponsor.  
The principal investigator will review adverse event and response data on each patient to ensure 
safety and data accuracy. The principal investigator will personally conduct or supervise the 
investigation and provide appropriate delegation of responsibilities to other members of the 
research staff.  
 6SRQVRU0RQLWRULQJ3ODQ
This trial will be monitored by personnel employed by Harris Technical Services on contract to 
the NCI, NIH. Monitors are qualified by training and experience to monitor the progress of 
clinical trials. Personnel monitoring this study will not be affiliated in any way with the trial 
conduct. 
At least 25% of enrolled patients’ will be randomly selected and monitored at least biannually or 
as needed, based on accrual rate. The patients selected will have 100% source document 
verification done. Additional monitoring activities will include: adherence to protocol specified 
study eligibility, treatment plans, data collection for safety and efficacy, reporting and time 
frames of adverse events to the NCI IRB and FDA, and informed consent requirements. Written 
reports will be generated in response to the monitoring activities and submitted to the Principal 
investigator and Clinical Director or Deputy Clinical Director, CCR, NCI. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
41 
 

3+$50$&(87,&$/,1)250$7,21

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TRC105 is an IgG1, kappa immunoglobulin containing murine light- and heavy-chain variable 
region sequences and human constant region sequences. TRC105 has an approximate molecular 
weight of 148 kDa.  
 

75&3$&.$*,1*$1'/$%(/,1*
TRC105 will be supplied at 5 mg/mL in PBS in sealed 15 mL glass vials containing 15 mL. 
Vials of TRC105 are labeled with the following:  
Table 10:  Label Text Approval Form 
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For Intravenous Use Only.  Single-use vial 
                        
 Lot: XXXXXXX 
Mfg Date: XX/XX/XXXX 
Caution: New Drug--Limited by Federal (or United States) law to investigational use. 
TRACON Pharmaceuticals, Inc., San Diego, CA 92122 USA 
 
 
 
 
 
 
(X) New Request 
(__) Amendment No: 
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Change: 
 
Prepared By: Sharon Real 
 
Date: 21 March 2011 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
42 
 
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Approved By: 
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Approved By: 
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For information regarding current formulation, please refer to section 2.4.3. TRC105 Physical, 
Chemical, and Pharmaceutical Properties and Formulations.
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TRC105 will be prepared in the pharmacy and diluted into normal saline in polyolefin plastic 
bags. TRC105 will be administered using an in-line 0.2 micron low protein binding filter.  
Compatibility studies support the use of tubing that is polyethylene lined and non-DEHP. 
Following dilution in normal saline, TRC105 will be administered at room temperature within 8 
hours of reconstitution. Depending on the dose and patient weight, multiple vials may be 
required for a single dose.   
The following formulae should be used to calculate the volume of TRC105 to be added to 
normal saline: 
Patient weight (kg) × dose level (mg/kg) divided by TRC105 concentration (mg/mL) = 
volume of TRC105 (mL) to be administered. 
The volume of TRC105 to be administered can be rounded up or down to the nearest 0.1 mL. If 
an increment of 0.05 mL is calculated, the volume should be rounded up.  The calculated volume 
of TRC105 is to be a concentration between 0.03 mg/mL and 5 mg/mL (undiluted).     The 
diluted TRC105 must be gently inverted several times in order to ensure a homogeneous 
solution.  Preparations of TRC105 in infusion containers are stable for up to 8 hours at room 
temperature. 
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The Investigator should not return clinical study materials to TRACON unless specifically 
instructed to do so by TRACON.  All used or expired vials of TRC105 should be retained.  A 
TRACON representative will periodically conduct an accountability of the used or expired vials 
and authorize their destruction. 
If the participating pharmacy is prohibited by institutional policy from retaining open or expired 
vials, the Site Pharmacist will then be responsible for documenting the destruction of the vials 
and completing an Investigational Drug Product Destruction Form. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
43 
 
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Please refer to section 2.4.2 TRC105 Clinical Pharmacology, Toxicity and Efficacyunder the 
heading TRC105 Clinical Safety for all information relating to adverse events from TRC105.
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1. TRC105 is a human/murine chimeric IgG1 monoclonal antibody that binds to human 
CD105, thus inhibiting angiogenesis and tumor growth.  However, there is no current 
human clinical data to support such biological activity. 
2. Via the detection of plasma VEGF and PlGF (placenta-derived growth factor), we have 
been able to consistently detect elevated levels of both proteins following an array of 
anti-angiogenic therapies, including the anti-VEGF antibody bevacizumab, VEGFR2 
inhibitors, and their combinations in clinical studies.   
3. The data quality for determining plasma levels of VEGF and PlGF is exceptional, 
allowing the detection of small changes of levels of these proteins associated with 
systemic hypoxia.  Such analysis would provide the necessary support for the putative 
mechanism of action of the agent under investigation. 
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Blood samples will be taken at various time points pre- and post-TRC105 treatment and be used 
to measure levels of surrogate biomarkers for the demonstration of mechanism of action of the 
investigational agent. 
Collection and Processing of Specimen(s): 
Plasma: Two 4ml EDTA tubes (BD, Franklin Lakes, NJ) are collected from patients pre- dose on 
cycle 1 day 1, cycle 1 day 15, and cycle 2 day 15.  Immediately place tubes on wet ice and then 
refrigerate. The date and H[DFW time of each blood draw should be recorded on the tube. The 
samples need to be processed within 2 hours of collection. Please page 102-11964 (Gareth Peters 
or alternate tech) for immediate pick-up. Contact Dr. Figg’s Blood Processing Core (BPC) in 
10/5A09 at 301-402-3622 or 301-594-6131 with any questions. The tubes are centrifuged in the 
BPC at 2400rpm for 5 minutes at 4ºC.  The plasma layer from each tube is transferred into a 
separate 2ml cryovial, immediately frozen on dry ice, and stored at -80ºC.  The frozen samples 
will be transferred to Dr. Cao’s lab at Bldg 37, Rm. 6134 in batches (tel: 301-435-9039).  
Pharmacodynamic Tests and Data Analysis:  
Plasma levels of angiogenic factors will be performed for sCD105, VEGF, PlGF, bFGF and 
sVEGFR1 (soluble VEGF receptor 1).  The analysis will be done with assays developed on 
electrochemiluminescence platform that provides ultra-high sensitivity and very large signal 
dynamic range. Purified protein standard will be used for generating standard curves for 
concentration determination. Data analysis will be performed with Prism (GraphPad, San Diego, 
CA) to determine the medium value, interquartile range, and p value in paired t test.  


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
44 
 
sCD105 collected predose C1D1, C1, D15 and C2, D15 will require one additional lavender tube 
and to be processed by Dr. Figg’s lab.  The National Cancer Institute will batch and ship sCD105 
samples to Dr. Seon at Roswell Park Cancer Institute. 
TRC105 interferes with the R & D Systems sCD105 kit, so plasma for sCD105 to be stored at 
NCI and batch shipped for analysis to: 
Jill Duzen 
Seon Laboratory 
CGP bldg. Room L5-126 
Roswell Park Cancer Institute 
Elm and Carlton Streets 
Buffalo, NY 14263 
Phone: 716-845-4482  
Correlations:  
If the induction of VEGF and PlGF can be observed, correlative studies will be performed 
between the induced levels of angiogenic factors and the dose levels of TRC105 in the phase I 
segment of the trial.  If responses can be established in phase II, correlative studies will be 
performed between the initial levels of the angiogenic factors, or the degree of their induction 
with the clinical responses.   
Sample Data Collection: 
All samples sent to the Clinical Pharmacology Program (CPP) will be barcoded, with data 
entered and stored in the Patient Sample Data Management System (PSDMS) utilized by the 
CPP (the Blood Processing Core is part of the CPP). This is a secure program, with access to the 
PSDM System limited to defined CPP personnel, who are issued individual user accounts. 
Installation of PSDMS is limited to computers specified by Dr. Figg. These computers all have a 
password restricted login screen. All CPP personnel with access to patient information annually 
complete the NIH online Protection of Human Subjects course.  
PSDMS creates a unique barcode ID for every sample and sample box, which cannot be traced 
back to patients without PSDMS access. The data recorded for each sample includes the patient 
ID, name, trial name/protocol number, time drawn, cycle time point, dose, material type, as well 
as box and freezer location. Patient demographics associated with the clinical center patient 
number are provided in the system. For each sample, there are notes associated with the 
processing method (delay in sample processing, storage conditions on the ward, etc.). 
Sample Storage and Destruction: 
Barcoded samples are stored in barcoded boxes in a locked freezer at either -20 or -80qC 
according to stability requirements.  These freezers are located onsite in the CPP and offsite at 
NCI Frederick Central Repository Services (Fisher BioServices) in Frederick, MD. Visitors to 
the laboratory are required to be accompanied by laboratory staff at all times.  
Access to stored clinical samples is restricted. Samples will be stored until requested by a 
researcher named on the protocol. All requests are monitored and tracked in the PSDM System. 
All researchers are required to sign a form stating that the samples are only to be used for 
research purposes associated with this trial (as per the IRB approved protocol) and that any 
unused samples must be returned to the CPP. It is the responsibility of the NCI Principal 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
45 
 
Investigator to ensure that the samples requested are being used in a manner consistent with IRB 
approval. 
Following completion of this study, samples will remain in storage as detailed above. Access to 
these samples will only be granted following IRB approval of an additional protocol, granting 
the rights to use the material.  
If, at any time, a patient withdraws from the study and does not wish for their existing samples to 
be utilized, the individual must provide a written request. Following receipt of this request, the 
samples will be destroyed (or returned to the patient, if so requested), and reported as such to the 
IRB. Any samples lost (in transit or by a researcher) or destroyed due to unknown sample 
integrity (i.e. broken freezer allows for extensive sample thawing, etc.) will be reported as such 
to the IRB. 
Sample barcodes are linked to patient demographics and limited clinical information. This 
information will only be provided to investigators listed on this protocol, via registered use of the 
PSDMS. It is critical that the sample remains linked to patient information such as race, age, 
dates of diagnosis and death, and histological information about the tumor, in order to correlate 
genotype with these variables. 
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Two 8cc CPT-citrate tubes (blue/black tiger top) will be drawn for analysis of circulating 
endothelial progenitor cells (CEP), mature circulating endothelial cells (CEC) and circulating 
tumor cells (CTC). CEC samples will be collected from patients pre- dose on cycle 1 day 1, 
cycle 1 day 15 and cycle 2 day 15. CTC samples will be collected from patients at baseline, prior 
to dose cycle 4 (green top).  As soon as possible after the patient is scheduled please send email 
notification to the Trepel lab: Jane Trepel at trepel@helix.nih.gov; Min-Jung Lee at 
leemin@mail.nih.gov that the sample is scheduled.  After the sample is drawn please call the 
Trepel lab at 301-496-1547 to communicate that the sample is ready.  Keep the sample on the 
unit at room temperature.  The sample will be picked up by the lab. CEC, CEP, and CTC will be 
analyzed by multiparameter flow cytometry.  If cell number permits, the sample may be analyzed 
for changes in immune cell subsets, including regulatory T cells and CD8+/IL-17+ T cells, 
which may reflect changes in TGF-beta biology. The impact of TRC105 on TGF-beta biology 
may also be assessed by examination of TGF-beta/Smad signaling in endothelial cells and 
immune cells.  If tumor biopsies are available they may be examined for the same parameters as 
peripheral blood, i.e. mature endothelial cells and endothelial progenitor cells, immune subsets 
and TGF-beta signaling.  Viable cells will be prepared using the Miltenyi GentleMACS 
Dissociator or by hand using mechanical dissociation and dissociative enzymes as needed for the 
tumor sample.  Serum osteopontin may also be measured in, using ELISA (Pass, H et al. 1(QJO
- 0HG 353:1564-1573, 2005), Luminex or similar technology.  Serum osteopontin will be 
collected Cycle 1 Day 1 and Cycle 2 Day 15 in a 5 ml, red top tube.  
FcGRIII will be collected at baseline (lavender top tube). 
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Serum concentrations of TRC105 will be determined to assess pharmacokinetics of TRC105 and 
correlate with clinical response and toxicity. Serial samples will be obtained for pharmacokinetic 
analysis on C1D1 and C1D15 at the following time points: 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
46 
 
x Predose on C1D1 and C1D15 – SKDVH,DQGSKDVH,, 
x Immediately at the end of infusion on C1D1 and C1D15 – SKDVH,DQGSKDVH,,
x 1, 2, 8, 24 and 48 h after the end of C1D1 and C1D15 infusions – RQO\LQSKDVH, 
x During Cycle 2 and Cycle 3, trough and peak pharmacokinetic samples will be collected: 
x Predose on C2D1,  C2D15, C3D1 and C3D15 
x Immediately at the end of infusion on C2D1,  C2D15, C3D1 and C3D15 
At each timepoint, a venous blood sample will be collected in a 4 mL serum vacutainer tube (red 
top). Page the Clinical Pharmacology Program on 102-11964 for immediate pickup (Dr. Figg’s 
Lab - Building 10, Room 5A09; Tel: 301-402-3622).  
Upon arrival in the Clinical Pharmacology Program, samples will be centrifuged, and the serum 
transferred into cryovials for storage at -80C. In addition, samples will be barcoded as described 
in section 9.1.2.  
The samples will be batch shipped to and analyzed by WuXi Apptec, Attention Theodora 
Solomos (4751 League Island Blvd., Philadelphia, PA 19112), Telephone 215-218-5500 ext. 
5662.  
The pharmacokinetic characteristics of TRC105 in patients with CRPC will be evaluated using 
the WinNonlin software (Pharsight, Mountain View, CA).  The maximum concentration, time to 
maximum concentration, the area under the curve extrapolated to infinity, clearance, and the 
apparent terminal half-life will be calculated. 
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Metastatic tumor burden and treatment response is commonly evaluated on serial CT scans with 
subjective target lesion selection and measurement on baseline and post-treatment exams 
(RECIST).  Subjective measurement error has been studied showing false categorization of 
partial response based on two measurements of the same lesion [56]. Semi-automated RECIST 
measurements of malignant lymph nodes produce reliable results when compared to manual 
measurements [57]. It is generally believed that assessment on thin section data on the most 
tumors possible [58] would be the optimal approach to assessing response to therapy. However, 
with manual protocols, the detection and measurement of additional lesions compounds the total 
time investment in the evaluation that has been rarely feasible.  Various software programs have 
recently been developed to address this deficiency. 
We aim to assess time savings of semi-automated lesion localization and measurement on serial 
images of metastatic cancer patients as compared to the current manual process. The automated 
software that will be used is available in the PACS (Picture Archiving and Communications 
System) at NIH provided by Carestream Health (Rochester, NY) and called the Lesion 
Management Application (LMA). The application has advanced serial image co-registration as 
well as refined registration for lesion identification (based on original exam). The program semi-
automatically segments and measures the lesion targeted by the radiologist on baseline CT, then 
automatically localizes and measures the lesion on the subsequent exam.  Preliminary results 
demonstrate that target lesions can be identified, segmented, and measured (including RECIST 
DQG volume) in most cases. Routine inclusion of tumor measurements should greatly assist 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
47 
 
providers in quickly evaluating the efficacy of cancer therapies. Tumor evaluation by volume 
determination on serial CT studies can be enhanced and made more effective by semi-automated 
detection of previously identified and measured target lesions. 
We will retrospectively assess CT scans acquired for tumor response evaluations via automated 
volumetric measurements obtained using LMA.  We will also assess the accuracy and 
consistency of target lesion localization, segmentation, and resultant measurements, to include 
volumes, on serial CT studies.


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
48 
 
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All baseline and follow-up evaluations can be performed during the last week of the prior cycle.  
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a: TRC105: Dose as assigned; administered I.V. every two weeks. One cycle = 28 days  
b: Premedications: Acetaminophen 650 mg, dexamethasone 20 mg iv, Famotidine 20 mg iv (or similar H2 blocker) 
x1, Cetirizine 10 mg iv or po x1 (or similar oral or intravenous antihistamine) 30 minutes to two hours prior. For 
details and dexamethasone tapering schedule please refer to section 4.3 
c: Sodium, potassium, chloride, bicarbonate, BUN, creatinine, glucose, albumin, total protein, calcium, magnesium, 
phosphorous, AST, ALT, alkaline phosphatase, total bilirubin, uric acid 
G)RU83&UDWLR!D-hour urine protein will need to be obtained and the level should be < 2000 mg for patient 
enrollment.  UPC will be performed every other cycle 
e: CT chest, abdomen, pelvis; radionuclide bone scintigraphy; refer to section 11for frequency of imaging studies  
f: See section 9.2 for details as to pharmacokinetic timepoints to be drawn.  
g: see section 9.1 for details as to pharmacodynamic timepoints/angiogenic biomarkers to be drawn.  
h. See Section 9.1.3 for details; CEC drawn pre-dose on C1D1, C1D15, C2D15; CTC drawn pre-C1D1 and pre C4D1; 
FcGRIII drawn at baseline. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
49 
 
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X
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a: TRC105: Dose as assigned; administered I.V. every week. One cycle = 28 days  
b: Premedications: Acetaminophen 650 mg, dexamethasone 20 mg iv, Famotidine 20 mg iv (similar H2 blocker), 
Cetirizine 10 mg iv (or similar oral or intravenous antihistamine 30 minutes to two hours prior. For details and 
dexamethasone tapering schedule please refer to section 4.3 
c: Sodium, potassium, chloride, bicarbonate, BUN, creatinine, glucose, albumin, total protein, calcium, magnesium, 
phosphorous, AST, ALT, alkaline phosphatase, total bilirubin, uric acid 
G)RU83&UDWLR!D-hour urine protein will need to be obtained and the level should be < 2000 mg for 
patient enrollment.  UPC will be performed every other cycle 
e: CT chest, abdomen, pelvis; radionuclide bone scintigraphy; refer to section 11for frequency of imaging studies  
f: See section 9.2 for details as to pharmacokinetic timepoints to be drawn.  
g: see section 9.1 for details as to pharmacodynamic timepoints/angiogenic biomarkers to be drawn.  
h. See Section 9.1.3 for details; CEC drawn pre-dose on C1D1, C1D15, C2D15; CTC drawn pre-C1D1 and pre 
C4D1; FcGRIII drawn at baseline.


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
50 
 
 0($685(0(172)())(&7
Re-staging bone scans and CT scan of chest, abdomen, and pelvis will be required every two 
months for the first four months of the study (following cycles two and four), and then after 
every 3 cycles of treatment. If screening CT scan is negative for soft tissue disease, repeat CT 
imaging will not be required. Confirmatory scans should also be obtained 4 weeks following 
initial documentation of objective response (CR or PR).  
Objective response and progression will be evaluated in this study using the new international 
criteria proposed by the Response Evaluation Criteria in Solid Tumors (RECIST) Committee 
[Eisenhauer EA, et al. New response evaluation criteria in solid tumours: Revised RECIST 
guideline (version 1.1) 2009; Eur J Ca 45:228-247]. 
Note:  Lesions are either measurable or non-measurable using the criteria provided below. The 
term “evaluable” in reference to measurability will not be used because it does not provide 
additional meaning or accuracy. 
 5(63216(&5,7(5,$)255$',2*5$3+,&678',(6
 0HDVXULQJRI6RIW7LVVXH'LVHDVH
Response and progression will be evaluated in this study using the new international criteria 
proposed by the revised Response Evaluation Criteria in Solid Tumors (RECIST) guideline 
(version 1.1) [(XU - &D 45:228-247, 2009].  Changes in the largest diameter (unidimensional 
measurement) of the tumor lesions and the shortest diameter in the case of malignant lymph 
nodes are used in the RECIST criteria. 
a. Evaluation of Target Lesions  
&RPSOHWH5HVSRQVH&5
Disappearance of all target lesions.  Any pathological lymph nodes (whether target or non-target) 
must have reduction in short axis to <10 mm
3DUWLDO5HVSRQVH35
At least a 30% decrease in the sum of the diameters of target lesions, taking as reference the 
baseline sum diameters 
3URJUHVVLYH'LVHDVH3'
At least a 20% increase in the sum of the diameters of target lesions, taking as reference the 
smallest sum on study (this includes the baseline sum if that is the smallest on study).  In 
addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at 
least 5 mm.  (Note:  the appearance of one or more new lesions is also considered progressions)
6WDEOH'LVHDVH6'
Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as 
reference the smallest sum diameters while on study 
b. Evaluation of Non-Target Lesions  


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
51 
 
&RPSOHWH5HVSRQVH&5
Disappearance of all non-target lesions and normalization of tumor marker level.  All lymph 
nodes must be non-pathological in size (<10 mm short axis) 
Note:  If tumor markers are initially above the upper normal limit, they must normalize for a 
patient to be considered in complete clinical response. 
1RQ&51RQ3'6WDEOH'LVHDVH6'
Persistence of one or more non-target lesion(s) and/or maintenance of tumor marker level above 
the normal limits. 
3URJUHVVLYH'LVHDVH3'
Appearance of one or more new lesions and/or XQHTXLYRFDOSURJUHVVLRQ of existing non-target 
lesions. 8QHTXLYRFDO SURJUHVVLRQ should not normally trump target lesion status.  It must be 
representative of overall disease status change, not a single lesion increase.     
Although a clear progression of “non-target” lesions only is exceptional, the opinion of the 
treating physician should prevail in such circumstances, and the progression status should be 
confirmed at a later time by the review panel (or Principal Investigator). 
c. Evaluation of Best Overall Response 
The best overall response is the best response recorded from the start of the treatment until 
disease progression/recurrence (taking as reference for progressive disease the smallest 
measurements recorded since the treatment started).  The patient's best response assignment will 
depend on the achievement of both measurement and confirmation criteria. 
 
Table 13:  Evaluation of Best Overall Response 
7DUJHW
/HVLRQV
1RQ7DUJHW
/HVLRQV
1HZ
/HVLRQV
2YHUDOO
5HVSRQVH
%HVW
2YHUDOO
5HVSRQVH
ZKHQ
&RQILUPDWLRQ
LV
5HTXLUHG
CR 
CR 
No 
CR 
!4 wks. Confirmation** 
CR 
Non-CR 
Non-PD 
No 
PR 
 
!4 wks. Confirmation** 
CR 
Not evaluated 
No 
PR 
PR 
Non-CR 
Non-PD 
Not evaluated 
No 
PR 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
52 
 
7DUJHW
/HVLRQV
1RQ7DUJHW
/HVLRQV
1HZ
/HVLRQV
2YHUDOO
5HVSRQVH
%HVW
2YHUDOO
5HVSRQVH
ZKHQ
&RQILUPDWLRQ
LV
5HTXLUHG
SD 
Non-CR 
Non-PD 
Not evaluated 
No 
SD 
Documented at least once !4 
wks. from baseline** 
PD 
Any 
Yes or No 
PD 
 
No prior SD, PR or CR 
Any 
PD*** 
Yes or No 
PD 
Any 
Any 
Yes 
PD 
      *See RECIST 1.1 manuscript for further details on what is evidence of a new lesion. 
          **Only for non-randomized trials with response as primary endpoint. 
         ***In exceptional circumstances, unequivocal progression in non-target lesions may be 
accepted as disease progression 
 
 
d. Patients with a global deterioration of health status requiring discontinuation of treatment 
without objective evidence of disease progression at that time should be reported as 
“V\PSWRPDWLF GHWHULRUDWLRQ.”  Every effort should be made to document the objective 
progression even after discontinuation of treatment. 
e. In some circumstances, it may be difficult to distinguish residual disease from normal 
tissue.  When the evaluation of complete response depends on this determination, it is 
recommended that the residual lesions be investigated (fine needle aspirate/biopsy) 
before confirming the complete response status. 
 &RQILUPDWRU\0HDVXUHPHQW'XUDWLRQRI5HVSRQVH
a. Confirmation 
To be assigned a status of PR or CR, changes in tumor measurements must be confirmed by 
repeat assessments that should be performed at least 4 weeks after the 
criteria for response are first met.  
b. Duration of Overall Response 
The duration of overall response is measured from the time measurement criteria are  
 
met for CR or PR (whichever is first recorded) until the first date that recurrent or    progressive 
disease is objectively documented (taking as reference for progressive disease the smallest 
measurements recorded since the treatment started). 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
53 
 
The duration of overall CR is measured from the time measurement criteria are first met for CR 
until the first date that progressive disease is objectively documented. 
 0HDVXUDEOH'LVHDVH
Measurable lesions are defined as those that can be accurately measured in at least one 
dimension (longest diameter to be recorded) as !20 mm by chest x-ray, as !10 mm with CT 
scan, or !10 mm with calipers by clinical exam.  All tumor measurements must be recorded in 
millimeters (or decimal fractions of centimeters). 
Note:  Tumor lesions that are situated in a previously irradiated area might or might not be 
considered measurable.   
 0DOLJQDQW/\PSK1RGHV
To be considered pathologically enlarged and measurable, a lymph node must be !15 mm in 
short axis when assessed by CT scan (CT scan slice thickness recommended to be no greater 
than 5 mm).  At baseline and in follow-up, only the short axis will be measured and followed. 
 1RQ0HDVXUDEOH'LVHDVH
All other lesions (or sites of disease), including small lesions (longest diameter <10 mm or 
SDWKRORJLFDO O\PSK QRGHV ZLWK   WR  PP VKRUW D[LV DUH FRQVLGHUHG QRQ-measurable 
disease.  Bone lesions, leptomeningeal disease, ascites, pleural/pericardial effusions, 
lymphangitis cutis/pulmonitis, inflammatory breast disease, and abdominal masses (not followed 
by CT or MRI), are considered as non-measurable. 
Note:  Cystic lesions that meet the criteria for radiographically defined simple cysts should not 
be considered as malignant lesions (neither measurable nor non-measurable) since they are, by 
definition, simple cysts. 
‘Cystic lesions’ thought to represent cystic metastases can be considered as measurable lesions, 
if they meet the definition of measurability described above. However, if non-cystic lesions are 
present in the same patient, these are preferred for selection as target lesions. 
 7DUJHW/HVLRQV
All measurable lesions up to a maximum of 2 lesions per organ and 5 lesions in total, 
representative of all involved organs, should be identified as WDUJHWOHVLRQV and recorded and 
measured at baseline.  Target lesions should be selected on the basis of their size (lesions with 
the longest diameter), be representative of all involved organs, but in addition should be those 
that lend themselves to reproducible repeated measurements.  It may be the case that, on 
occasion, the largest lesion does not lend itself to reproducible measurement in which 
circumstance the next largest lesion which can be measured reproducibly should be selected.  A 
sum of the diameters (longest for non-nodal lesions, short axis for nodal lesions) for all target 
lesions will be calculated and reported as the baseline sum diameters.  If lymph nodes are to be 
included in the sum, then only the short axis is added into the sum.  The baseline sum diameters 
will be used as reference to further characterize any objective tumor regression in the measurable 
dimension of the disease. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
54 
 
 1RQ7DUJHW/HVLRQV
All other lesions (or sites of disease) including any measurable lesions over and above the 5 
target lesions should be identified as QRQWDUJHWOHVLRQVand should also be recorded at baseline. 
Measurements of these lesions are not required, but the presence, absence, or in rare cases 
unequivocal progression of each should be noted throughout follow-up.  
 0HWDVWDWLF%RQH/HVLRQV
Disease progression is considered if a minimum of two new lesions is observed on bone scan. 
New lesions seen by the end of cycle 2 or before cycle 3 (with the first re-staging bone scan) 
may represent disease that was not detected on the pre-study scan, and a confirmatory scan will 
be required at the next scheduled re-staging bone scan unless clinically not indicated.  If 
confirmed, progression should be dated by the initial time when the lesions are first detected. If 
new lesions are seen after cycle 2, but no additional lesions are seen on confirmatory scans, the 
scans from post-cycle 2 would serve as the baseline scan to evaluate for disease progression,  
(ref: Scher, HI et al. J Clin Onc, 26 (7), 2008) 
 &OLQLFDO/HVLRQV
Clinical lesions will only be considered measurable when they are superficial (e.g., skin nodules 
and palpable lymph nodes) and t10 mm diameter as assessed using calipers (e.g., skin nodules).  
In the case of skin lesions, documentation by color photography, including a ruler to estimate the 
size of the lesion, is recommended.  

*XLGHOLQHVIRU(YDOXDWLRQRI0HDVXUDEOH'LVHDVH
All measurements should be taken and recorded in metric notation using a ruler or calipers.  All 
baseline evaluations should be performed as closely as possible to the beginning of treatment and 
never more than 4 weeks before the beginning of the treatment. 
The same method of assessment and the same technique should be used to characterize each 
identified and reported lesion at baseline and during follow-up. Imaging-based evaluation is 
preferred to evaluation by clinical examination unless the lesion(s) being followed cannot be 
imaged but are assessable by clinical exam. 

0HWKRGVRI0HDVXUHPHQW
Chest X-ray - Lesions on chest x-ray are acceptable as measurable lesions when they are clearly 
defined and surrounded by aerated lung.  However, CT is preferable.  
CT and MRI - CT and MRI are the best currently available and reproducible methods to measure 
target lesions selected for response assessment. For this study helical Multi-detector CT will be 
performed with cuts of 5 mm in slice thickness for chest, abdomen and pelvis lesions and 2-3 
mm thickness for head and neck lesions. 
 67$7,67,&$/&216,'(5$7,216
The primary objectives of this study are twofold. First, define the maximum tolerable dose 
(MTD) of TRC105 given as an intravenous infusion every two weeks or every week of each 28 
day cycle that will be administered in the phase II portion of the study. Secondly, determine if 
single-agent TRC105, when administered to patients with castrate-resistant prostate cancer at 20 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
55 
 
mg/kg every two weeks, the MTD determined in phase I, is associated with a 6-month 
progression-free survival probability of 30% in two separate strata of patients: those who are 
chemotherapy naïve (and have not received prior antiangiogenic therapy) and those who are 
chemotherapy-refractory with evidence of disease progression despite prior docetaxel. 
Published data from previous trials of patients with similar eligibility requirements demonstrated 
that the median time-to-progression in patients with chemotherapy-naïve, PSA-progressive, 
castrate-resistant prostate cancer is approximately three months [12, 59, 60].For CRPC patients 
with evidence of post-docetaxel disease progression, the median progression-free survival (using 
similar end points as listed here) with agents in the second-line setting has ranged from 2.5 
months [55, 61] up to 19 weeks [52]. In a phase II study of sorafenib in patients with progressive 
metastatic CRPC [62], approximately 10% of patients were progression – free at 6 months [62].
Based on these results, it would be useful to demonstrate whether TRC105 is able to induce 
progression free survival in 30% of patients at the 6 month (approximately day 180) evaluation 
time point.  
The study will initially contain a phase I dose escalation portion, which will enroll all patients 
with progressive metastatic castrate-resistant prostate cancer. The study will evaluate patients in 
six cohorts of escalating dose levels.  
As of the date of amendment 10-C-0062G, 17 patients were enrolled onto the first 5 dose levels 
and the dose level 6 could potentially enroll up to 6 patients, based on a standard 3+3 design. 
Thus, a maximum of 23 patients will be needed to complete the phase I evaluation, after all six 
dose levels are tested. 
The phase II portion of the study will be conducted separately in two different patient strata, 
those who are chemotherapy-naïve for metastatic disease and those who have evidence of post-
docetaxel disease progression.  Given that the impact of treatment with TRC105 may be different 
according to prior exposure to chemotherapy, and the influence of prior chemotherapy on PFS is 
uncertain, patients will be stratified based on whether they are chemotherapy-naïve or have 
disease progression despite prior docetaxel-based chemotherapy. This is in order to allow for an 
adequate number of patients to be enrolled such that the impact of TRC105 in each stratum can 
be assessed independently. The two strata will have identical designs since, in each stratum, the 
goal is to target a modest level of activity. In each stratum of patients, the objective will be to 
determine if a 6 month progression free survival probability of 30.0% can be identified. If this is 
found to be true in either or both strata, then further evaluation in a definitive phase III trial will 
be considered appropriate. 
The phase II portion of the trial will be conducted in each stratum using a two-stage optimal 
design (Simon R, Controlled Clinical Trials, 10:1-10, 1989). Using alpha=0.10 and beta=0.10 as 
acceptable error probabilities, the trial will target 30% as the desirable proportion of patients who 
are still without progression by radiographic or clinical criteria at the 6th monthly evaluation 
(p1=0.30), and will be considered inadequate if only a fraction consistent with 10% are without 
progression by the same evaluation time (p0=0.10). 
Initially, 12 patients will be enrolled in each stratum and evaluated for progression. Six patients 
who are treated at 20 mg/kg (the phase I MTD) will be included, in the appropriate strata, among 
the initial 12 for each of the two strata. The enrollment will be temporarily halted after the 12th 
patient is enrolled in a stratum unless we know that 2 patients have passed the 6 month point 
without progression.  If 2 or more of the first 12 patients enrolled in a given stratum have not 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
56 
 
progressed at the 6th evaluation (day 180, approximately), then enrollment will continue until a 
full 35 patients have been enrolled in that stratum.  If, among the first 12 patients enrolled, 0 or 1 
are able to be progression free at the 6 month evaluation, then no further patients will be enrolled 
into that stratum once such a determination has been made. Enrollment may continue to the other 
stratum if one stratum has ended accrual.  If 6 or more of the total cohort of 35 patients in a 
stratum have been found to be progression free at 6 months, then this will indicate an adequate 
progression free probability to justify further consideration of TRC105 in this population of 
patients.  On the other hand, if 2 to 5 of 35 are progression free at 6 months, this will be 
considered insufficient.  Under the null hypothesis (10% progression free at 6 months), the 
probability of being able to stop accrual after 12 patients have been evaluated at 6 months is 
66%.  
In addition to evaluation of the proportion of patients that are progression free at 6 months, the 
progression free survival for patients in the phase II portion of the trial will also be analyzed via 
a Kaplan-Meier curve. As well, the overall response rate will be reported for the phase II patients 
in each stratum, and the overall survival will be reported using a Kaplan-Meier curve.  These 
results will also be compared between the two strata, but in an exploratory manner. The study 
will include an early stopping rule in the phase II portion of the trial. If among the first 10 
patients, in both strata combined,  two grade 4 GI bleeding events occur, then accrual will stop 
unless an amendment to modify the treatment is approved, because 2/10 is consistent with a 45% 
event rate (the upper one sided 90% CI on 2/10 is 45%), which would be considered excessive. 
Secondary endpoints, including all correlations between circulating endothelial cells, 
pharmacokinetic parameters and such pharmacodynamic endpoints as toxicity and response, will 
be performed in an exploratory fashion, focusing on the patients enrolled in the phase II portion 
of the study, using non-parametric analyses unless data are clearly normally distributed, and will 
not be adjusted for multiple comparisons.  Changes in molecular markers of angiogenesis before 
and after administration of TRC105, including serum for soluble CD105, will be evaluated using 
a Wilcoxon signed rank test. All findings with potentially important levels of statistical 
significance will be reported as hypothesis generating and suggestive of future confirmatory 
studies.  
Toxicity information will be reported as the maximum grade of each type of toxicity obtained for 
a given patient, separately by stratum and separately by dose level as appropriate, for all 
toxicities with at least a possible attribution to TRC105. 
Based on previous efforts in recruiting patients with this disease onto trials at the NCI, it is 
anticipated that up to 30 or more patients per year may be able to enroll onto this protocol.  
Allowing for up to 23 patients in the phase I portion of the trial, and up to 64 additional patients 
in the phase II portion (70 for the two strata – 6 who could be included from cohort 6 , the MTD 
cohort from the phase I portion) a total of up to 87 total subjects may be required to be enrolled. 
Thus, it is expected that accrual of up to 87 total patients can be completed in approximately 3 to 
4 years. In order to allow for a small number of in-evaluable patients, the accrual ceiling will be 
set at 90 patients. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
57 
 
 +80$168%-(&763527(&7,216
 5$7,21$/()2568%-(&76(/(&7,21
Subjects treated on this study, will be individuals with metastatic prostate cancer, which has 
recurred (or persisted) after appropriate standard treatment.  Individuals of any race or ethnic 
group will be eligible for this study.  Eligibility assessment will be based solely on the patient’s 
medical status.  Recruitment of patients onto this study will be through standard CCR 
mechanisms. No special recruitment efforts will be conducted. 
 3$57,&,3$7,212)&+,/'5(1
Individuals under the age of 18 will not be eligible to participate in this study because they are 
unlikely to have prostate cancer, and because of unknown toxicities in pediatric patient. 
 (9$/8$7,212)%(1(),76$1'5,6.6',6&20)2576
The potential benefit to a patient that goes onto study is a reduction in the bulk of their tumor and 
improvement in their bony lesions, which may or may not have favorable impact on symptoms 
and/or survival.  Potential risks include the possible occurrence of any of a range of side effects 
which are listed in the Consent Document. The procedure for protecting against or minimizing 
risks will be to medically evaluate patients on a regular basis as described in Section 10. 
 5,6.6%(1(),76$1$/<6,6
For patients with castrate-resistant prostate cancer, median survival is in the range of 12-18 
months. Potential risks include the possible occurrence of any of a range of side effects listed in 
section 7. Risk of serial biopsies: All care will be taken to minimize risks that may be incurred 
by tumor sampling. However, there are procedure-related risks (such as bleeding, infection and 
visceral injury) that will be explained fully during informed consent. If patients suffer any 
physical injury as a result of the biopsies, immediate medical treatment is available at the NIH’s 
Clinical Center in Bethesda, Maryland. Although no compensation is available, any injury will 
be fully evaluated and treated in keeping with the benefits or care to which patients are entitled 
under applicable regulations. 
 &216(17$1'$66(17352&(66$1''2&80(17$7,21
Patients will meet with an associate or principal investigator on the trial in the Prostate Cancer 
Clinic, during the initial evaluation for this study.  During that meeting, the investigator will 
inform patients of the purpose, alternatives, treatment plan, research objectives and follow-up of 
this trial.  The investigator will then provide a copy of the IRB-approved informed consent 
document that is included in this protocol.  The patient will be allowed to take as much time as 
he wishes, in deciding whether or not he wishes to participate.  If a prolonged period of time 
expires during the decision making process (several weeks, as an example), it may be necessary 
to reassess the patient for protocol eligibility. The original signed consent goes to Medical 
Records; copy placed in research record (NIH policy). 
All patients must have a signed informed consent form and an on-study (confirmation of 
eligibility) form filled out and signed by a participating investigator before entering on the study. 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
58 
 
 3$7,(175(&25'6$1'48$/,7<$6685$1&(
Protocol related data will be entered into the NCI C3D database. Medical records will be 
maintained to include but not limited to: 
x Signed, Dated Consent Form 
x Completed Eligibility Checklist 
x Source documents verifying eligibility criteria 
x Pre-study lab, radiology, pathology reports, histopathological results 
x Interim monitoring test results 
x Physician notes/progress notes documenting physical evaluations, PS, history, prior 
therapy 
x Physician/Nursing notes documenting vital signs, adverse event assessment, 
x Treatment administration forms-In-patient/Out-patient 
x PK Collection Forms  
x Response evaluation- results/tumor measurements 
x Biologic correlate sample collection/analysis 
x Off study summary


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
59 
 
 
 $33(1',;$
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Grade 
Descriptions 
Percent 
Description 
0 
Normal activity.  Fully active, 
able to carry on all pre-disease 
performance without restriction. 
100 
Normal, 
no 
complaints, 
no 
evidence of disease. 
90 
Able to carry on normal activity; 
minor signs or symptoms of 
disease. 
1 
Symptoms, 
but 
ambulatory.  
Restricted in physically strenuous 
activity, but ambulatory and able 
to carry out work of a light or 
sedentary 
nature 
(e.g., 
light 
housework, office work). 
80 
Normal activity with effort; 
some signs or symptoms of 
disease. 
70 
Cares for self, unable to carry on 
normal activity or to do active 
work. 
2 
In bed <50% of the time.  
Ambulatory and capable of all 
self-care, but unable to carry out 
any work activities.  Up and 
about more than 50% of waking 
hours. 
60 
Requires occasional assistance, 
but is able to care for most of 
his/her needs. 
50 
Requires considerable assistance 
and frequent medical care. 
3 
,Q EHG ! RI WKH WLPH
Capable of only limited self-care, 
confined to bed or chair more 
than 50% of waking hours. 
40 
Disabled, requires special care 
and assistance. 
30 
Severely 
disabled, 
hospitalization indicated.  Death 
not imminent. 
4 
100% bedridden.  Completely 
disabled.  Cannot carry on any 
self-care.  Totally confined to bed 
or chair. 
20 
Very 
sick, 
hospitalization 
indicated. Death not imminent. 
10 
Moribund, 
fatal 
processes 
progressing rapidly. 
5 
Dead. 
0 
Dead. 
 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
60 
 
References 
1. Eisenhauer EA, Therasseb P, Bogaerts J, et al. New response evaluation criteria in solid 
tumours: Revised RECIST guideline (version 1.1) 2009; Eur J Ca 45:228-247 
2. Jemal A, Siegel R, Ward E, Hao Y, Xu J, Thun MJ. CA Cancer J Clin. 2009 Jun 9. [Epub 
ahead of print] 
3. http://seer.cancer.gov/csr/1975_2006/results_single/sect_01_table.01.pdf 
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MJ, 
Ries LAG, Krapcho M, Neyman N, Aminou R, Howlader N, Altekruse SF, Feuer EJ, 
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MD, http://seer.cancer.gov/csr/1975_2006/, based on November 2008 SEER data 
submiVVLRQSRVWHGWRWKH6((5ZHEVLWH. 
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5. Grossfeld GD, Stier DM, Flanders SC, Henning JM, Schonfeld W, Warolin K, et al. Use 
of second treatment following definitive local therapy for prostate cancer. Data from the 
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6. Figg WD, Feuer JA, Bauer KS. Management of hormone-sensitive metastatic prostate 
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7. Aragon-Ching JB, Dahut WL. J Cancer Ther. 2007 May ; 5(A): 151–160 
8. Petrylak DP, et al. Docetaxel and Estramustine Compared with Mitoxantrone and 
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9. Tannock IF, de Wit R, Berry WR et al. Docetaxel plus Prednisone or Mitoxantrone plus 
Prednisone for Advanced Prostate Cancer. N Engl J Med 2004; 351:1502 – 12 
10.Berthold DR, Pond GR, Soban F, et al. Docetaxel Plus Prednisone or Mitoxantrone Plus 
Prednisone for Advanced Prostate Cancer: Updated Survival in the TAX 327 Study. J 
Clin Oncol 2008; 26:242 - 245 
11.Schnadig ID, Beer TM, Optimal timing of chemotherapy in androgen independent 
prostate cancer. Urologic Oncology: Seminars and Original Investigations 2009; 27: 97-
100  
12.Small, EJ, Schellhammer PF, Higano CS et al. Placebo-Controlled Phase III Trial of 
Immunologic Therapy with Sipuleucel-T (APC8015) in Patients with Metastatic, 
Asymptomatic Hormone Refractory Prostate Cancer. J Clin Oncol 2006; 24:3089-3094 
13.Folkman, J. Tumor angiogenesis: therapeutic implications. N. Engl. J. Med., 1182–
1186, 1971. 
14.Folkman J. Anti-angiogenesis: new concept for therapy of solid tumors. Ann Surg. 
1972;175:409–416. 
15.Folkman J. Tumor angiogenesis: a possible control point in tumor growth. Ann Intern 
Med. 1975;82:96 –100 


Abbreviated Title: Ph I/II TRC105 in Prostate Ca 
Version Date: 06-19-12 
61 
 
16.Folkman, J, Shing Y Angiogenesis. J Biol Chem 1992; 267(16): 10931-4. 
17.Carmeliet, P. Angiogenesis in health and disease. Nat Med 2003; 9(6): 653-60. 
18.Weidner N, Folkman J, Pozza F, et al. Tumor angiogenesis: a new significant and 
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