A Phase II Study of MEDI-551 as Maintenance Therapy After Allogeneic Stem Cell Transplant in Patients With Newly Diagnosed Poor-risk or Relapsed Multiple Myeloma
Phase: PHASE2
Conditions: Multiple Myeloma
Sponsor: Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
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Protocol Title:  A phase II study of MEDI-551 as maintenance therapy after allogeneic stem cell 
transplant in patients with newly diagnosed poor-risk or relapsed multiple myeloma  
 
 
 
 
Principal Investigator: 
Philip Imus, M.D. 
 
 
 
 
CRB1 Rm 310 
 
 
 
 
1650 Orleans Street 
 
 
 
 
Baltimore, MD 21287 
 
 
 
 
410-955-8873 (phone) 
 
 
 
 
410-995-8839 (fax) 
 
 
 
Co-Investigators: 
 
Carol Ann Huff, M.D. 
 
 
 
 
Ivan Borrello, M.D. 
 
 
 
 
Syed Abbas Ali, M.D. 
 
 
 
 
Satish Shanbag, M.D. 
 
 
 
 
Christian Gocke, M.D., Ph.D. 
Richard Jones, M.D. 
 
 
 
 
Ephraim Fuchs, M.D., Ph.D. 
 
 
 
 
William Matsui, M.D. 
 
 
 
Statistician:  
 
Ravi Varadhan, Ph.D., Ph.D. 
 
 
 
Research Nurse: 
 
Laura Cucci, RN 
 
 
 
Data Manager: 
 
Jacqueline Hart 
 
 
 
Investigational agent:  
MEDI-551 
 

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
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INDEX 
 
SCHEMA 
 
1   
INTRODUCTION 
 
1.1 
Multiple myeloma 
1.2  
Multiple myeloma cancer stem cells. 
1.3 
Clinical experience targeting multiple myeloma cancer stem cells 
 
1.3.1 Rituximab 
 
1.3.2 Lenalidomide + dexamethasone + MEDI-551 
1.4  
Allogeneic stem cell transplantation in multiple myeloma 
 
2 
STUDY OBJECTIVES 
 
 
2.1 
Primary objective 
 
2.2 
Secondary objective 
 
3 
PATIENT SELECTION 
 
 
3.1 
Inclusion criteria 
 
3.2 
Donor eligibility 
 
3.3 
Donor prioritization 
 
3.4  
Exclusion criteria 
 
3.5. 
Patient eligibility criteria to begin maintenance therapy 
 
4   
REGISTRATION PROCEDURES 
 
 
4.1. 
Registration requirements 
4.2.    Accrual goal 
 
5 
TREATMENT PLAN 
 
 
5.1 
Transplantation Regimen 
 
 
5.1.1.  Fludarabine 
5.1.2. Pre-transplantation cyclophosphamide 
5.1.3. Total body irradiation (TBI) 
5.1.4. Day of rest 
5.1.5.   Hematopoietic stem cell graft infusion 
5.1.6. Post-transplantation cyclophosphamide (PTCy) 
5.1.7. Mycophenolate mofetil (MMF) 
5.1.8. Tacrolimus 
5.1.9   Growth factors 
5.2 
MEDI-551 maintenance therapy 
5.3 
Supportive care 
5.3.1 Transfusions, nutritional support, and infection prophylaxis and treatment 
5.3.2 Anti‐ovulatory treatment 
5.3.3 Intravenous access 
5.3.4 Infection prophylaxis 
5.3.5  Antiemetics 
 
6 
MEASUREMENT OF EFFECT 
 

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6.1 
Disease and survival endpoints 
6.1.1 Survival outcomes 
6.1.2 Disease response 
6.2 
Transplant related outcomes  
6.2.1    Graft‐versus‐host disease (GVHD) 
6.2.2 Toxicity 
6.3 
Quantification of myeloma precursors 
6.4 
MEDI-551 pharmacokinetic evaluation 
 
7 
STUDY MONITORING AND DATA COLLECTION 
 
7.1 
Pre-transplant evaluations and requirements 
7.2 
Post-transplant evaluations and requirements 
7.3 
Pre-maintenance evaluations and requirements 
7.4   
Evaluations during maintenance therapy with MEDI-551 
7.5 
Evaluations post-maintenance therapy with MEDI-551 
7.6   
Study monitoring 
 
8 
RISK and REPORTING REQUIREMENTS 
 
8.1 
Possible adverse effects of medications 
8.1.1 Cyclophosphamide (Cytoxan®) 
8.1.2 Mesna (sodium-2-mercapto ethane sulphonate) 
8.1.3 Fludarabine (Fludara) 
8.1.4 Total Body Irradiation (TBI) 
8.1.5 Mycophenolate Mofetil (MMF, Cellcept®) 
8.1.6 Tacrolimus (FK-506, Prograf®) 
8.1.7 MEDI-551 
8.2 
Toxicity grading 
8.3 
Toxicity reporting 
 
9. 
STATISTICAL CONSIDERATIONS 
 
9.1   
Study design and objectives 
9.2   
Accrual 
9.3   
Primary endpoint 
9.4   
Sample size and power calculation 
 
10 
PATHOLOGY REVIEW 
 
11  
RECORDS TO BE KEPT 
 
12 
PATIENT CONSENT AND PEER JUDGMENT 
 
13 
REFERENCES 
 
14 
APPENDIX 
 
 
 
14.1   Appendix A 
 
14.2 
Tables 
 
 
 
 
 

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SCHEMA 
 
Day -6 to -1 
 
Non-myeloablative stem cell conditioning 
 
(fludarabine, cyclophosphamide, total body irradiation) 

 
Day 0 
 
Allogeneic T-cell replete stem cell infusion 
 


Day +3-180 
 
 
GVHD prophylaxis 
 
 
 
(cyclophosphamide Day 3,4 
 
 
 
MMF Day 5-35 
 
 
 
Tacrolimus Day 5-60) 
 

Day +60, +90 or 
 
Initiation of MEDI-551 maintenance 
+120  
 
 
(12 28-day cycles) 
 
 
 
Day +396-465 
 
Discontinue MEDI-551 maintenance 
 
 
 
Day +465- 
 
Assess disease status, GVHD, chimerism 
 
 
 
 
 
 

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1   
INTRODUCTION 
 
1.1 
Multiple myeloma  
 
Multiple myeloma (MM) is the second most common hematologic malignancy in the United States 
and is characterized by the clonal expansion of neoplastic plasma cells.1  The most common 
clinical manifestations of the disease include anemia, renal failure, osteopenia, and 
hypercalcemia.  Early treatment paradigms focused on the use of standard cytotoxic 
chemotherapeutic agents, especially alkylators (e.g., melphalan) in combination with 
glucocorticoids.  More recently several novel drugs with diverse mechanisms of action that include 
immunomodulatory agents, proteasome inhibitors, histone deacetylase inhibitors, and monoclonal 
antibodies targeting cell surface antigens have been approved for clinical use in MM.  Accordingly, 
response rates, especially the achievement of complete remissions, has dramatically increased.  
Unfortunately, MM remains incurable for the vast majority of patients despite these clinical 
advances.  The factors involved in MM relapse are not fully understood, but one possible 
explanation for the discrepancy between complete remission and cure rates may be that current 
therapies fail to target tumor cells with the clonogenic growth potential, i.e., MM cancer stem cells 
(CSCs).2,3 
 
1.2 
Multiple myeloma cancer stem cells 
 
Mature plasma cells expressing the characteristic plasma cell surface antigen CD138 are the 
hallmark of MM.  However, several groups have identified subpopulations of tumor cells that lack 
CD138 and instead express B cell surface antigens (CD19 and CD20).4-16  These cells can be 
identified in the bone marrow and peripheral blood of all MM patients and are clonally related to 
the abnormal plasma cells since they harbor identical immunoglobulin idiotypes and somatically 
hypermutated and rearranged gene sequences.  It is clear that mature plasma cells are 
responsible for the clinical manifestations of MM by virtue of their infiltration of the bone marrow 
(anemia, hypercalcemia, bone disease) or monoclonal immunoglobulin production (renal failure, 
immunodeficiency).  However, they appear terminally differentiated like their normal counterparts 
and it has been unclear whether they have the clonogenic growth potential to drive disease 
initiation or relapse.17  
 
In order to better understand the processes involved in disease relapse we have studied the 
growth potential of MM cells derived from primary clinical specimens.  We found that mature 
CD138+ plasma cells have little tumorigenic potential either in vitro or in vivo.18,19  In contrast, 
clonotypic B cells are capable of generating tumor cell colonies in vitro and characteristic MM 
plasma cells and symptomatic disease in immunodeficient mice.  These clonotypic B cells can also 
be re-isolated from affected animals and maintain the ability to produce disease over the course of 
serial transplantation.  These properties, namely self-renewal and the production of differentiated 
progeny that recapitulates the original tumor, suggest that clonotypic B cells represent the cancer 
stem cell (CSC) in MM.  Initial clinical responses demonstrate that bulk plasma cells are 
responsive to standard therapies, but inevitable relapse suggest that tumorigenic CSCs are not 
inhibited.2,20  We compared the sensitivity of MM plasma cells and CSCs to standard anti-myeloma 
agents (dexamethasone, cyclophosphamide, lenalidomide, and bortezomib) and found that MM 
CSC were relatively resistant to all of these compared to plasma cells.19  Therefore, the 
combination of intrinsic drug-resistance and tumorigenic and self-renewal potential implicates MM 
CSC as the primary mediators of disease relapse, and strategies inhibiting these cells may 
ultimately improve long-term outcomes.  We have identified a number of processes that regulate 
the self-renewal of MM CSCs, including the Hedgehog signaling pathway and telomerase 
activity.21,22  Moreover, we have explored the unique phenotype of MM CSCs using monoclonal 
antibodies directed against CD19 and CD20 and found that these can inhibit clonogenic MM 
growth in the laboratory.23  In this clinical trial, we will examine the clinical activity of a novel anti-

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CD19 monoclonal antibody, MEDI-551 in MM patients following allogeneic bone marrow 
transplantation (alloSCT). 
 
1.3 
Clinical experience targeting multiple myeloma cancer stem cells 
 
1.3.1 Rituximab 
 
CD20 is a B cell surface antigen and expressed by MM CSCs, but not mature plasma cells, in 
most MM patients.  To date, three clinical trials have been published examining the activity of the 
anti-CD20 monoclonal antibody rituximab as a single agent in MM patients.24-26  None of these 
trials demonstrated significant clinical activity based on standard response criteria that primarily 
reflect changes in bulk tumor burden, such as circulating monoclonal immunoglobulin (M protein) 
levels or the extent of bone marrow plasma cell infiltration.  However, rituximab would not be 
expected to have activity against bulk plasma cells that lack CD20 expression and the elimination 
of CD20+ MM CSCs would not impact standard response criteria since they constitute a minor 
fraction of all tumor cells.27,28  Furthermore, even if the production of new plasma cells was 
inhibited, it is likely that clinical responses would be delayed since these cells have a long half-life, 
and longer follow up may have demonstrated an eventual decrease in bone marrow plasmacytosis 
and M protein levels. 
 
In order to better detect any clinical effects of MM CSC targeting, we examined whether the use of 
“maintenance” rituximab after induction with conventional therapy could prolong the time to 
disease progression.29  We carried out a phase II trial sequentially administering high-dose 
cyclophosphamide (Cy) to eliminate mature plasma cells followed by rituximab to inhibit MM 
CSCs.29  We treated 21 patients, including those with primary refractory disease (n=1), high risk 
1st remission defined as β2M > 5.0 or deletions of chromosome 13 (n=15), and relapsed disease 
responding to salvage treatment (n=5).  Based on uniform response criteria, the following 
responses were seen: 1 CR, 4 VGPR, 11 PR (or continued PR), and 5 with progressive disease.  
The median time to progression was 201 days (95% C.I.: 184, 488), and 2 patients remain 
progression-free (738-1498 days after Cy).  The median overall survival was 1194 days (95%C.I.: 
919, NA).  
 
In order to understand the clinical relevance of 
MM CSCs, we determined whether changes in 
their frequency were associated with clinical 
outcomes.  We quantified the in vitro growth of 
MM CSCs isolated from patients undergoing 
treatment with high-dose Cy + rituximab using the 
methods we originally developed to identify MM 
CSCs.30  Bone marrow aspirates were collected 
prior to treatment, following count recovery, and 
at 2, 3, 6, 9, and 12 months post Cy, and MM 
CSCs were quantified as MM colony formation in 
methylcellulose at each time point.  We 
successfully evaluated in vitro clonogenic MM 
growth at all intended time points in 18 (86%) of 
the 21 patients enrolled on this trial (Fig. 1).  
Using a time-dependent covariate analysis, we 
found that the absolute number of colonies at day 
90 and 180, was significantly associated with an increased risk of progression with hazard ratios 
HR=1.46 (95% CI: 1.12, 1.88), p=0.004, and HR=1.69 (95% CI: 1.24, 2.30), p=0.0009, 
respectively.  Furthermore, using all available data (up to one year post-Cy), both the absolute 
colony count and the change from baseline were significant predictors of time to progression with 

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HR=1.72 (95% CI: 1.26, 2.34), p=0.0006 and HR=1.46 (95% CI: 1.11, 1.93), p=0.007, 
respectively.  Using a simple linear regression model to study changes in colony counts over time, 
patients were divided into two groups based on whether they had a positive slope (increasing 
colony numbers) or negative slope (decreasing colony numbers) over the duration of evaluation.  
Kaplan-Meier curves were generated for each of these groups (Fig. 2), and patients with a positive 
slope had a higher risk of progression than patients with a negative slope, HR=10.56, 95% CI (2.2, 
50.7), p=0.003.  For patients with decreasing colony counts (Fig. 2, n=6, solid line), progression-
free survival was 640 days as compared to 185 days for those with rising colony counts (n=12, 
dotted line).  We also examined the clinical status of the 12 patients with increasing MM colony 
numbers and found that all were clinically stable when MM colony counts recovered to pre-
treatment baseline levels.  However, all 12 patients subsequently clinically progressed on the 
basis of increasing bone marrow plasmacytosis or serum M protein levels after an average delay 
of ~100 days (range 30-240 days).  We also examine whether MM CSCs were eliminated by 
rituximab in the circulation, but by flow cytometry found persistent 
clonotypic B cells with rituximab bound to the cell surface.  Therefore, 
rituximab was able to bind to MM CSCs, but were not eradicated by 
this monoclonal antibody.  The mechanisms by which MM CSCs are 
resistant to rituximab are unclear but may be mediated by low CD20 
expression, inadequate effector cell function, or FCRIIIa 
polymorphisms that prevent maximal monoclonal antibody recognition 
and binding during ADCC. 
 
1.3.2 Lenalidomide + dexamethasone + MEDI-551  
 
To improve MM CSC targeting, we have studied additional 
monoclonal antibodies targeting B cell surface antigens expressed by 
these cells.  We identified the anti-CD19 monoclonal antibody MEDI-
551 (see Section 1.5 for information regarding MEDI-551) as an ideal 
candidate as it is an affinity-optimized and afucosylated antibody with enhanced antibody-
dependent cellular cytotoxicity (ADCC).  Moreover, we found that CD19 was typically expressed at 
higher levels on MM CSCs than CD20.  We initiated a clinical trial in newly diagnosed MM patients 
studying MEDI-551 in combination with lenalidomide and dexamethasone (Rd).  In this early 
phase, single arm, clinical trial, newly diagnosed MM patients received 28 day cycles of Rd.  
Following two initial cycles of Rd, MEDI-551 was administered during cycle 3 (days 1, 8) and cycle 
4 (day 1).  Patients with evidence of clinical response continued on Rd.  
 
We enrolled 17 newly diagnosed MM patients on this study with a median age of 65 (range 34- 73) 
years of age and ISS stage I (n=11), II (n=2), or III (n=4).  Seven patients had t(4;14) 
translocations.  Two patients did not receive MEDI-551 due to progressive disease (PD) or 
noncompliance.  Of the 15 evaluable patients clinical responses included very good partial 
remission (VGPR; n=3), partial remission (PR; n=10), minor response (MR; n=1), and stable 
disease (SD; n=1) after cycle 2 (Rd).  Following the completion of cycle 4 (Rd + MEDI-551), 
responses consisted of VGPR (n=6), PR (n=8), and MR (n=1).  There were no serious adverse 
events observed.  Two patients experienced Grade 2 infusion reactions after the first MEDI-551 
dose but no further reactions for subsequent doses.  Ten patients who completed Rd + MEDI-551 
currently remain on Rd, and responses at the end of cycle 7 include CR (n=1), VGPR (n=8), and 
PR (n=1).   
 
The frequency of MM CSCs was serially measured by quantifying the growth of MM colonies from 
bone marrow aspirates or circulating peripheral blood MM CSCs by flow cytometry prior to the 
initiation of any therapy (baseline), at the end of cycle 2 (Rd alone), and following cycle 4 (Rd + 
MEDI-551). Bone marrow derived CFU-MM increased by a median of 2.5 fold (range 0.4-7.4) after 
cycle 2 (Rd) then decreased in 14/15 patients after cycle 4 (Rd+MEDI-551; 0.48 fold, range 0.14-

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0.85) relative to baseline levels.  In comparison, we also examined changes in MM-CFU in 4 newly 
diagnosed MM patients receiving standard treatment with Rd alone and found that they continually 
increased 9.3 fold (range 4-14) at a median of 4 months (range 2-4) despite achieving at least a 
VGPR in all patients.  We also serially quantified circulating MM CSCs and found that they 
increased in 14/15 patients after cycle 2 (Rd; 1.6 fold, range 0.4-8.6) then fell in 13/15 after cycle 4 
(Rd + MEDI-551; 0.6 fold, range 0.01-7.4). Peripheral blood CSCs were also quantified at the end 
of cycle 5 and cycle 7.  At end of cycles 5 and 7 (approximately 55 and 110 days after the last 
dose of MEDI-551) MM CSCs subsequently increased in 4/10 and 8/10 patients, respectively.  
Circulating MM CSCs increased by end of cycle 4 in 2 patients, and both experienced PD by end 
of cycle 7.  
 
Therefore, MM CSCs decreased in most patients following 3 doses of MEDI-551 compared to 33% 
of patients in our previous clinical trial examining high-dose Cy + rituximab.  Furthermore, 
compared to standard treatment with Rd in which MM CSCs uniformly increase over time, the 
addition of MEDI-551 was associated with a clear decrease in the frequency of these cells in the 
majority of patients.  MM CSCs subsequently rebounded following the completion of MEDI-551 
treatment suggesting that a longer period of treatment may be needed to fully inhibit these cells.  
 
1.4  
Allogeneic stem cell transplantation in multiple myeloma 
 
Allogeneic stem cell (AlloSCT) transplantation currently remains the only potentially curative option 
for MM, but initial studies utilizing standard myeloablative conditioning regimens carried a high 
degree of transplant related mortality.31,32  The development of non-myeloablative (i.e., mini) 
allogeneic transplant (NM-AlloSCT) approaches have significantly decreased morbidity and 
mortality attributable to high-dose conditioning regimens, but high rates of graft-versus-host 
disease (GVHD) remained a serious complication impacting long-term outcomes.32-35   
 
At Johns Hopkins, we have pioneered the use of high-dose post-transplantation (PTCy) as GVHD 
prophylaxis that has impacted clinical stem cell transplantation in two major ways.36-38  First, the 
potent immunomodulatory impact of PTCy allows HLA-haploidentical alloSCT to be safely carried 
out with similar outcomes to those seen with fully HLA-identical transplants.  This alleviates most 
donor availability issues as all first-degree and half of second-degree relatives are potentially 
eligible to donate.  Second, it dramatically improves the safety of the procedure with respect to 
GVHD.  Recent CIBMTR analyses have actually shown lower rates of serious Grade III and IV 
acute GVHD (aGVHD) and chronic GVHD (cGVHD) with haploidentical transplants to those seen 
with matched transplants, with patients requiring systemic treatment to approximately 5% and 
10%, respectively.39  
 
We have recently compiled our experience utilizing alloSCT with PTCy in MM.40  Here, 39 patients 
underwent alloSCT from 2001-2011, including 9 with myeloablative and 30 with NM conditioning 
regimens.  32 patients received HLA-identical and 7 received HLA-haploidentical grafts.  Similar to 
our other studies utilizing PTCy, the rates of serious Grade III and IV aGVHD (n=3, 8%, all Grade 
III), cGVHD requiring treatment (n=3, 8%), and transplant related mortality (n=1, 2.6%) were low.  
Eight patients (21%) remain in a sustained CR at a median follow up of 82 months.  Disease 
relapse was common and the median progression free survival was 14 (95%CI: 6.2-32.8) months.  
Therefore, PTCy is effective in reducing transplant related morbidity and mortality, but relapse 
remains a major issue. 
 
High rates of disease relapse following alloSCT with PTCy are not limited to MM, but can also be 
seen in most other hematologic malignancies.36  In order to reduce relapse rates, we have begun 
to explore the use of maintenance strategies following alloSCT.  Growing experience in several 
hematologic malignancies have demonstrated that disease specific therapies routinely used in the 
non-transplant setting can dramatically reduce relapse rates when used in the post transplant 

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setting.  These include BCR-ABL tyrosine kinase inhibitors in ALL and CML,41 sorafenib in FLT3-
mutated AML,42,43 and rituximab in NHL.44  Therefore, non-curative agents may significantly 
improve long-term clinical outcomes in the post-transplant setting, and it appears that the new, 
non-tolerant, non-exhausted transplanted immune system works in tandem with these agents.  
1.5  
MEDI-551 
 
MEDI-551 is a humanized afucosylated IgG1 kappa monoclonal antibody directed against CD19.  
Compared to earlier therapeutic monoclonal antibodies directed against B cell surface antigens 
(e.g., rituximab), MEDI-551 has several modifications to improve its anti-tumor activity.  MEDI-551 
is an afucosylated antibody, and the lack of fucose from the Fc domain results in a 10-fold 
increase in binding to human FCRIIIa compared to the fucosylated counterpart.  Moreover, this 
increased binding affinity negates any impact of FCRIIIa polymorphisms on antibody binding to 
effector cells.  MEDI-551 also induces little antigen internalization and dissociates slowly from the 
cell surface to increase recognition by effector cells.  These features enhance antibody-dependent 
cellular cytotoxicity (ADCC), and MEDI-551 displays potent in vitro ADCC activity against multiple 
B-cell leukemia and lymphoma cell lines.  Furthermore, the activity of MEDI-551 was equal or 
superior to the activity of rituximab in 11 of 15 cell lines tested.45 
 
The ability of MEDI-551 to target primary human B cells has been tested with peripheral blood 
mononuclear cells (PBMCs) from healthy donors.  The ADCC activity of MEDI-551 compares 
favorably to the activity of the rituximab in these assays.46  In addition, MEDI-551 has been tested 
for its ability to deplete malignant B cells in samples derived from CLL and ALL patients.  In 6 of 6 
CLL patient samples tested, the activity of MEDI-551 was superior to rituximab.  Similarly, MEDI-
551 was more potent (lower concentration giving half-maximal response (EC50) values) than 
rituximab against 4 patient-derived ALL samples.  To evaluate antitumor activity in vivo, MEDI-551 
has been tested in multiple severe combined immunodeficient (SCID) mouse models of human B-
cell leukemia and lymphoma. Treatment of Burkitt lymphoma subcutaneous xenografts (Raji, 
Daudi, Namalwa, and Ramos cells) with MEDI-551 significantly inhibited tumor growth compared 
to an IgG1 isotype control antibody.  The efficacy of MEDI-551 treatment was also noted in DLBCL 
xenograft models (Toledo, OCI-LY-19) as well as intravenous tumor models (Raji, Daudi, and 
Namalwa cells).46 
 
The clinical development of MEDI-551 is ongoing in oncology and autoimmune disorders (ie 
scleroderma, multiple sclerosis, and neuromyelitis optica). There are 5 clinical studies of MEDI-
551 in subjects with B-cell malignancies; these studies are described below, based on a data 
cutoff date of 31Mar2015.  Collectively, these data indicate that MEDI-551 has anti-tumor activity 
and a manageable safety profile. 
 
The Phase 1/2 study MI-CP204 enrolled 111 adult subjects with relapsed and refractory advanced 
B-cell malignancies (CLL, DLBCL, FL, or MM). MEDI-551 was evaluated at doses of 0.5, 1, 2, 4, 8, 
and 12 mg/kg. Two dose-limiting toxicities (DLTs) occurred at the 4 mg/kg and 12 mg/kg dose 
levels; both were infusion related reactions. The most commonly reported adverse events (> 20% 
of subjects) were infusion related reaction, fatigue, cough, and nausea. The most commonly 
reported related adverse events (AEs) (in ≥ 5% of subjects in the overall study population) were 
infusion related reaction, nausea, neutropenia, fatigue, and vomiting. Deaths were reported for 27 
of 111 (24.3%) subjects in MI-CP204. Progressive disease was the most common cause. All 27 
deaths were considered unrelated to MEDI-551. Thirty of 111 subjects (27.0 %) in MI-CP204 
experienced objective response (OR), defined as complete response (CR) or partial response 
(PR). Three subjects, 2 subjects who achieved CR and 1 subject who achieved a very good PR, 
were retreated following relapse. 
 
Study D2850C00001, is a Phase 1, open-label, dose escalation study of MEDI-551 in adult 
Japanese subjects with advanced B-cell malignancies. Twenty subjects were enrolled and have 

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received doses of 2, 4, 8, or 12 mg/kg. The AEs most commonly reported (in ≥ 15% of subjects) 
were infusion related reaction, hypertriglyceridemia, white blood cell count decreased, leukopenia, 
nasopharyngitis, lymphocyte count decreased, neutrophil count decreased, and rash. Two DLTs of 
infusion related reaction occurred at the 12 mg/kg dose; hence the MTD was determined to be 
8mg/kg in this population. 
 
Study CD-ON-MEDI-551-1019 is a Phase 2, multicenter, international, randomized, 3-arm, active-
control, open label study evaluating the antitumor activity, safety, tolerability, immunogenicity (IM), 
pharmacokinetics (PK), and pharmacodynamics of MEDI-551 when used in combination with 
bendamustine versus rituximab in combination with bendamustine in adult subjects with 
progressive CLL (also known as relapsed or refractory CLL). A total of 150 subjects have been 
treated with one of 3 regimens: MEDI-551 2 mg/kg, MEDI-551 4 mg/kg, or rituximab, each in 
combination with bendamustine. A total of 90 subjects have been treated with MEDI-551. The 
most common AEs reported in the combined MEDI-551 groups (in > 20% of subjects) were 
infusion related reaction, nausea, fatigue, neutropenia, pyrexia, cough, and constipation. Deaths 
were reported for 18 of 90 subjects (20.0%) who received MEDI-551 in CD-ON-MEDI-551-1019 (6 
of 33 subjects [18.2%] in the 2 mg/kg group and 12 of 57 subjects [21.1%] in the 4 mg/kg group) 
and in 6 of 60 subjects (10.0%) in the rituximab + bendamustine group. All except for 1 of the 
deaths (4 mg/kg MEDI-551 + bendamustine group) were considered not related to study drug. 
Thirty-five of 90 subjects (38.9%) in the combined MEDI-551 groups and 19 of 60 subjects (31.7%) 
in the rituximab group experienced SAEs. The SAE of infusion related reaction occurred more 
frequently in the combined MEDI-551 groups (10 of 90 subjects [11.1%]) than in the rituximab 
group (1 of 60 subjects [1.7%]). Febrile neutropenia occurred more frequently in the rituximab 
group (7 of 47 subjects [11.7%]) than in the combined MEDI-551 groups (2 of 90 subjects [2.2%]). 
 
Study CD-ON-MEDI-551-1088 is a Phase 2 study of MEDI-551when used in combination with 
ifosfamide-carboplatin-etoposide (ICE) or dexamethasone cytarabine-cisplatin (DHAP) versus 
rituximab in combination with ICE or DHAP in adult subjects with relapsed or refractory DLBCL. 
Subjects were initially assigned to one of3 regimens: MEDI-551 2 mg/kg, MEDI-551 4 mg/kg, or 
rituximab, each in combination with ICE or DHAP. A total of 119 subjects in CD-ON-MEDI-551-
1088 have received at least 1 dose of study treatment, including 71 subjects in the combined 
MEDI-551 groups. Adverse events reported for > 20% of subjects in the combined MEDI-551 
groups were anemia, thrombocytopenia, nausea, fatigue, neutropenia, constipation, vomiting, 
asthenia, and diarrhea. The most common AEs judged related to MEDI-551 (in > 10% of subjects 
in the combined MEDI-551 groups) were anemia, thrombocytopenia, nausea, neutropenia, fatigue, 
and leukopenia. Deaths were reported for 9 of 71 subjects (12.7%) receiving MEDI-551 (7 of 48 
subjects [14.6%] in the 2 mg/kg group and 2 of 23 subjects [8.7%] in the 4 mg/kg group) and 8 of 
48 subjects (16.7%) receiving rituximab in CD-ON-MEDI-551-1088. Two deaths in the MEDI-551 
group and 1 death in the rituximab group were considered to be related to investigational product. 
Thirty of 71 subjects (42.3%) in the combined MEDI-551 groups and 20 of 48 subjects (41.7%) in 
the rituximab group experienced SAEs in CD-ON-MEDI-551-1088.  
 
A Phase 1b/2, multicenter, open-label study of MEDI0680, a monoclonal antibody directed against 
human programmed cell death 1 (PD-1), in combination with MEDI-551, D2852C00004, is 
evaluating the safety, tolerability, clinical activity, MTD, PK, and anti-drug antibodies (ADA) in 
subjects with relapsed and refractory aggressive B-cell lymphoma. Eight subjects received MEDI-
551 at 12 mg/kg and MEDI0680 at 2.5 mg/kg or 10 mg/kg. Adverse events reported by more than 
1 subject were fatigue, constipation, diarrhea, nausea, vomiting, peripheral edema, paresthesia, 
and rash. Two subjects, both in the MEDI-551 12 mg/kg + MEDI0680 2.5 mg/kg dose group died. 
Neither death was considered to be related to either study drug. Both deaths were attributed to 
progressive disease. Serious adverse events were reported for 2 subjects in the MEDI-551 12 
mg/kg + MEDI0680 2.5 mg/kg group. One subject suffered Grade 3 hydronephrosis from which he 
recovered. The verbatim language for the second subject’s SAE (not yet coded) was 

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hospitalization and disease progression. 
 
2   
STUDY OBJECTIVES  
 
2.1  
Primary objective  
 
Determine the progression free survival of high-risk or relapsed MM patients undergoing 
non-myeloablative allogeneic stem cell transplantation (NM-AlloSCT) followed by 
maintenance therapy with MEDI-551. 
 
2.2  
Secondary objectives  
 
1.  Determine changes in MM CSCs in high-risk or relapsed MM patients receiving MEDI-
551 following NM-AlloSCT. 
 
2.  Evaluate the safety and toxicity of maintenance therapy with MEDI-551 following NM-
AlloSCT in patients with high-risk or relapsed MM. 
 
3.  Determine the overall response rate for treatment with MEDI-551 following NM-AlloSCT 
in patients with high-risk or relapsed MM. 
 
4.  Determine the rate of minimal residual disease negativity for treatment with MEDI-551 
following NM-AlloSCT in patients with high-risk or relapsed MM. 
 
5.  Determine the overall survival of patients with high-risk or relapsed MM patients 
receiving MEDI-551 following NM-AlloSCT. 
 
6. Determine the pharmacokinetics of MEDI-551 administered as a single agent following 
NM-AlloSCT in patients with high-risk or relapsed MM. 
 
7. Determine the immunogenicity of MEDI-551 administered as a single agent following 
NM-AlloSCT in patients with high-risk or relapsed MM. 
 
8. Determine changes in circulating B cell levels in high-risk or relapsed MM patients 
receiving NM-AlloSCT and MEDI-551.  
 
3   
PATIENT SELECTION 
 
3.1 
Inclusion criteria 
 
Patient eligibility for the study will be determined when patients are deemed eligible to proceed to 
AlloSCT.  To determine patient eligibility, evaluations for inclusion and exclusion criteria must be 
performed prior to patient registration.  Patients who meet these criteria can then be registered on 
the trial.  All evaluations for inclusion and exclusion criteria must be performed within 30 days prior 
to registration unless otherwise noted.   
 
At the time of study registration, patients will be eligible if they meet all of the following inclusion 
criteria:  
 
1.  Previous diagnosis of MM based on standard criteria as defined in Appendix A 
(Diagnostic Criteria for MM).  Diagnostic studies need not be performed within 30 days of 
registration;   
 

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2.  Patients must meet one of the disease criteria outlined in either a, b, or c: 
 
a.  Patients with newly diagnosed high-risk MM achieving a partial response (PR) or 
better at the time of enrollment in response to systemic anti-myeloma therapy, 
which may include autologous hematopoietic stem cell transplant (HSCT). 
 
High risk is defined by the presence of any one of the following:  
i.  High-risk chromosomal translocations by FISH: t(4;14), t(14;16), t(14;20), 
del(17p), del(1p), amplification 1q 
ii.  MyPRS GEP-70 high-risk signature either at diagnosis or at time of 
registration for the study 
iii.  LDH > 300 U/L at diagnosis 
iv.  Plasma cell leukemia 
v.  Relapse from prior therapy within 12 months 
 
b.  Patients with high-risk MM with at least 1 prior progression in PR or better in 
response to salvage systemic anti-myeloma therapy at the time of enrollment 
 
c.  Patients with standard risk MM with 1 prior progression within 18 months from an 
autologous HSCT and in VGPR or better in response to salvage systemic anti-
myeloma therapy at the time of enrollment.   
 
3.  Patients must have a suitable first-degree or second-degree related, HLA-haploidentical 
or HLA-matched stem cell donor.   The donor and recipient must be identical at least one 
allele of each of the following genetic loci: HLA-A, HLA-B, HLA-Cw, HLA-DRB1, and HLA-
DQB1. A minimum match of 5/10 is therefore required, and will be considered sufficient 
evidence that the donor and recipient share one HLA haplotype;  
 
4.  No previous AlloSCT (syngeneic HSCT permissible); 
 
5.  Any previous autologous HSCT must have occurred at least 3 months prior to start of 
conditioning; 
 
6.  ECOG performance status of 0-2;  
 
7.  Life expectancy > 6 months; 
 
8.  Adequate end organ function as measured by:    
a.  Left ventricular ejection fraction ≥ 35% or shortening fraction > 25%   
b.  Bilirubin ≤ 3.0 mg/dL (unless due to Gilbert’s syndrome or hemolysis), and ALT 
and AST < 5x ULN   
c.  FEV1 and FVC > 40% of predicted 
 
9.  Not pregnant or breast-feeding; 
 
10.  No uncontrolled infection. Note: Infection is permitted if there is evidence of response 
to medication;  
 
11.  The patient must be able to comprehend and have signed the informed consent. 
 
3.2.   Donor eligibility 
 
Donors must be: 

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1.  HLA‐haploidentical or HLA‐identical first-degree or second-degree relative of the patient 
based on allele or allele group level typing as defined in Section 3.1;  
 
2.  Medically fit to and willing to donate; 
 
3.  Lack of recipient anti‐donor HLA antibody.  Note: In some instances, low level, non-
cytotoxic HLA specific antibodies may be permissible if they are found to be at a level well 
below that detectable by flow cytometry. This will be decided on a case‐by‐case basis by 
the PI and one of the immunogenetics directors.  Pheresis to reduce anti‐HLA antibodies is 
permissible; however, eligibility to proceed with the transplant regimen would be contingent 
upon the success of the desensitization. 
 
4.  Has not donated blood products to patient. 
 
3.3. 
Donor prioritization 
 
In the event of multiple potential donors, donors will be prioritized in the following order: 
 
1.  Fit to donate; 
 
2.  HLA‐matched prioritized over HLA‐mismatched; 
 
3.  Lack of major ABO incompatibility.  In order of priority: 
a.  Compatible 
b.  Minor incompatibility 
c.  Major incompatibility 
 
4.  CMV serostatus: CMV negative donor preferred, if the patient is CMV negative; CMV 
positive donor preferred, if the patient is CMV is positive; 
 
5.  Avoidance of female donor for male recipient. 
 
Other factors such as donor age and health history will be integrated into the donor selection 
process per standard practice and may be prioritized over HLA, ABO and CMV status. 
 
3.4.   Exclusion criteria 
 
At the time of study registration, patients will be ineligible if any of the following exclusion criteria 
apply:  
 
1.  Diagnosis of any of the following cancers:  
a.  POEMS syndrome (plasma cell dyscrasia with polyneuropathy, organomegaly, 
endocrinopathy, monoclonal protein (M-protein) and skin changes) 
b.  Non-secretory myeloma (no measurable protein on Serum Free Lite Assay) 
c.  HTLV1 / HTLV2 positive 
d.  Diagnosis of amyloidosis 
 
2.  Failed to achieve at least a partial response (PR) to latest therapy;  
 
3.  Known history of HIV infection;  
 
4.  Systemic infection requiring treatment with antibiotics, antifungal, or antiviral agents 

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within 7 days of registration;  
 
5.  History of malignancy other than MM within 5 years of registration, except adequately 
treated basal or squamous cell skin cancer;  
 
6.  History of serious allergy or reaction to any component of the MEDI-551 formulation that 
would prevent administration; 
 
7.  Active hepatitis B as defined by seropositivity for hepatitis B surface antigen or patients 
with positive hepatitis B core antibody titers.  
 
8.  Patients with hepatitis C antibody will be eligible provided that they do not have elevated 
liver transaminases or other evidence of active hepatitis. 
 
3.5. 
Patient eligibility criteria to begin maintenance therapy 
 
In order to be eligible for maintenance therapy with MEDI-551, patients must have sufficiently 
recovered from NM-AlloSCT.  Between Day 60 and Day 120 following NM-AlloSCT, patients will 
be evaluated to receive MEDI-551.  If patients meet the eligibility criteria for initiating maintenance 
they will continue to be followed per the protocol. 
 
Eligibility criteria for initiating MEDI-551 are as follows: 
 
1.  Platelet count ≥ 75,000/mm3; 
 
2.  Absolute neutrophil count (ANC) ≥ 1,000/mm3; 
 
3.  Total bilirubin ≤ 3.0 mg/dL, except in patients with Gilbert’s syndrome; 
 
4.  ALT/AST < 3x the upper normal limit; 
 
5.  No ≥ Grade 2 visceral (gut or liver) acute GVHD; 
 
6.  No ≥ Grade 3 any other acute GVHD; 
 
7.  No active treatment for MM;  
 
4 
REGISTRATION PROCEDURES 
 
4.1. 
Registration requirements 
 
Patients will be registered in the CRMS. The following are additionally required: 
a.  Signed and dated informed consent; 
b.  Patient eligibility checklist(s). 
 
A registration may be cancelled, provided that protocol treatment has not been begun. 
 
4.2.    Accrual goal 
 
We will enroll patients in order to have 30 evaluable subjects.  An evaluable subject is defined as 
one who has received at least 6 months of MEDI-551.  We anticipate an enrollment of up to 36 
study participants to achieve this number of evaluable subjects.  All patients who are enrolled will 
be evaluated for safety. 

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5 
TREATMENT PLAN 
 
5.1   
Transplantation regimen 
 
The preparative regimen in each case consists of fludarabine, cyclophosphamide (Cy), and total 
body irradiation (TBI), with post-transplantation high‐dose Cy (PTCy), mycophenolate mofetil 
(MMF), and tacrolimus. 
 
5.1.1.  Fludarabine 
 
Fludarabine 30mg/m2/day (adjusted for renal function) is administered over a 30‐60 minute 
IV infusion on Days -6 through -2 (maximum cumulative dose, 150 mg/m2). 
 
The body surface area (BSA) for fludarabine dosing is based on actual body weight. 
 
For decreased creatinine clearance (CrCl), fludarabine dosage is reduced as follows or by 
institutional standard:   
CrCl 40‐69mL/min, fludarabine = 24mg/m2 
CrCl 20‐39mL/min, fludarabine = 20mg/m2 
 
CrCl will be estimated by the Cockcroft Formula, based on ideal body weight (IBW):   
 
CrCl = ((140 -age) x IBW (kg)) / Serum creatinine x 0.85 for females  
 
A measured CrCl or a glomerular filtration rate may be substituted to determine CrCl. 
 
Fludarabine dosing is based on the last CrCl prior to the start of conditioning.  The 
estimated CrCl on the day preceding start of conditioning may be used.  The fludarabine 
dose should be the same on Days ‐6 to ‐2, even if the creatinine changes.  However, 
adjustment in fludarabine dose due to creatinine changes during conditioning is permitted. 
 
5.1.2. Pre-transplantation cyclophosphamide 
 
Cy 14.5mg/kg/day is administered as a 1‐2 hour IV infusion on Days -6 and -5 after 
hydration.  Mesna 11.6mg/kg IV daily on Days -6 and -5 is not required, but may be given. 
 
Cy and mesna are dosed according to ideal body weight unless the patient weighs less 
than IBW, in which case dose drug according to actual weight. 
 
5.1.3. Total body irradiation (TBI) 
 
200cGy TBI is administered in a single fraction on Day -1.  Radiation sources, dose rates, 
and shielding follow institutional practice. 
 
5.1.4. Day of rest 
 
A day of rest (i.e., after preparative regimen completion and prior to hematopoietic stem 
cell graft infusion) is not routinely scheduled.  Up to two days of rest may be added in this 
window based on logistical considerations or clinically as indicated.  For one day of rest, 
fludarabine would be administered on Days -7 through -3, pre-transplantation Cy on Day -7 

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and Day -6, and TBI on Day -2.  For two days of rest, fludarabine would be administered on 
Days -8 through -4, pre-transplantation Cy on Day -8 and Day -7, and TBI on Day -3. 
 
5.1.5.   Hematopoietic stem cell graft infusion 
 
The graft will not be manipulated to deplete T cells. Processing for ABO incompatibility 
follows institutional practices. Guidelines for bone marrow and peripheral blood stem cell 
infusion are established and outlined in the ABO compatible/minor mismatched AlloSCT or 
the ABO incompatible AlloSCT standing orders. 
 
5.1.6. Post-transplantation cyclophosphamide (PTCy) 
 
Hydration prior to and following PTCy, management of volume status, and monitoring for 
hemorrhagic cystitis will follow institutional standards.  Mesna will be used with PTCy as 
per institutional standards. 
 
PTCy 50mg/kg IV, over approximately 1‐2 hours (depending on volume), is given on Day 3 
post-transplantation (ideally between 60 and 72 hours after marrow infusion) and on Day 4 
(approximately 24 hours after Day 3 PTCy). 
 
PTCy and mesna are dosed according to ideal body weight, unless the actual body weight 
is less, in which case dose drugs according to actual body weight. 
 
It is crucial that no systemic immunosuppressive agents are given from Day 0 until at least 
24 hours after the completion of the PTCy. This includes corticosteroids as anti-emetics. 
 
Dose adjustments for PTCy will not be made. 
 
5.1.7. Mycophenolate mofetil (MMF) 
 
MMF begins on Day 5, at least 24 hours after completion of PTCy.  The MMF dose is 
15mg/kg PO TID (actual body weight) with total daily dose not to exceed 3 grams (i.e., 
maximum 1g PO TID).  Doses are rounded to the nearest strength tablets.  Equivalent IV 
dosing  (1:1 conversion) may instead be given.   
 
MMF prophylaxis is discontinued after the last dose on Day 35, or may be continued if 
there is graft versus host disease (GVHD). 
 
No MMF dose adjustments are required for liver dysfunction.  For renal insufficiency, MMF 
dosing should not be modified unless dialysis is needed, in which case MMF can be 
reduced to 25‐50% of the starting dose. 
 
5.1.8. Tacrolimus 
 
Tacrolimus begins on Day 5, at least 24 hours after completion of PTCy.  The tacrolimus 
starting dose is 2mg PO BID or as per institutional standard.  Patients who cannot tolerate 
PO may be started IV and changed to PO as per institutional standard.  Dose is adjusted to 
maintain a serum trough level of 10-15ng/mL, with a minimum acceptable trough level of 
5ng/mL. 
 
In the case of prohibitive toxicities to calcineurin inhibitors, other immunosuppression may 
be given after case‐by‐case discussion with the PI or co‐PI. 
 

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Tacrolimus is discontinued after the last dose on Day 60 or according to standard 
institutional practices without taper, or may be continued if GVHD has occurred or may be 
discontinued earlier in the context of relapse, progression, graft failure, or prohibitive 
toxicity.  Patients with suspected graft failure should remain on tacrolimus until at least the 
~Day 60 chimerism assessment, although earlier discontinuation is permissible after 
discussion with the PI or co‐PI. 
 
Patients with hepatic or renal insufficiency should receive doses at the lower end of 
therapeutic concentrations.  No dose adjustments are required in patients undergoing 
hemodialysis. 
 
Due to extreme interactions with voriconazole and posaconazole, the tacrolimus dose 
should be empirically lowered when these azoles are initiated at steady state levels of 
tacrolimus.  Guidelines are provided in Table 5.1.8.  Dose adjustments for therapy with 
other azoles may be indicated.  However, the initial tacrolimus dose (on Day 5) remains 
fixed.  Of note, reversal of azole‐mediated inhibition of CYP3A4 (and others) and P‐
glycoprotein is gradual when azoles are stopped. Therefore, immediate significant dose 
increases in tacrolimus are not advised when azoles are stopped. Rather, tacrolimus dose 
increases should be cautious and based on more frequent monitoring of levels as 
appropriate 
 
5.1.9   Growth factors 
 
GCSF (filgrastim) begins on Day 5 at a dose of 5mcg/kg/day (actual body weight) IV or 
subcutaneously (rounding to the nearest vial dose is allowed), until the absolute neutrophil 
count (ANC) is ≥ 1,000/mm3 over the course of three days.  
 
5.2 
MEDI-551 maintenance therapy 
 
Medi-551 maintenance therapy will be initiated on Day 60 (±7 days), Day 90 (±7 days), or Day 120 
(±7 days) of NM-AlloSCT based on the eligibility criteria for the initiation of maintenance therapy as 
described in Section 3.1.  MEDI-551 will be administered on 28-day cycles at a dose of 4mg/kg, as 
an IV infusion over 60 ±15 minutes.  Infusion sets must contain a 0.2 micron in-line filter.  MEDI-
551 will be administered on days 1, 8, 15, and 22 of cycle 1, then 4mg/kg IV on day1 of cycles 2 
through 12.  Treatment may be stopped earlier if there is unacceptable toxicity, development of 
Grade 3 or 4 GVHD, documentation of disease progression, or patient withdrawal for other 
reasons. 
 
Patients will be monitored during and after MEDI-551 infusions with assessment of vital signs 
(temperature, blood pressure, pulse rate, respiratory rate, and pulse oxymetry) every 30 minutes 
during infusion, at the end of infusion, and 30 and 60 minutes after infusion.  In the event of an 
infusion-related reaction, the infusion of MEDI-551 may be decreased by 50% or interrupted until 
resolution of the event (up to 4 hours) and re-initiated at 50% of the initial rate until completion of 
the infusion.  Acetaminophen and/or an antihistamine (e.g., diphenydramine), or institutional 
equivalents, may be administered at the discretion of the investigator.  If the infusion reaction is 
severe or prolonged, methylprednisolone 100 mg (or the equivalent) may be administered as well.  
For subsequent infusions in patients who experience an infusion reaction and do not require 
discontinuation of MEDI-551, acetaminophen and an antihistamine may be administered prior to 
initiation of the MEDI-551 infusion according to standard of care.  As with any antibody, allergic 
reactions to dose administration are possible.  Therefore, appropriate drugs and medical 
equipment to treat acute anaphylactic reactions must be immediately available, and study 
personnel must be trained to recognize and treat anaphylaxis. 
 

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No dose reductions of MEDI-551 are allowed.  Patients should permanently discontinue treatment 
for any toxicity Grade ≥ 3 unless any of the following conditions exist: 
 
1.  Grade 3 fever that lasts ≤ 24 hours with or without medical therapy and is not 
considered an SAE; 
 
2.  Transient Grade 3 rigors or chills that are clearly attributable to MEDI-551 and respond 
to optimum therapy; 
 
3.  Any Grade 3 or 4 electrolyte alteration that is reversible to Grade ≤ 1 (or patient’s 
baseline) within 24 hours after it occurs; 
 
4.  Any Grade 3 liver function test elevation that resolves to Grade ≤ 1 or patient’s baseline 
within 7 days after it occurs. 
 
5.  Transient increase in lactate dehydrogenase (LDH) levels that resolve to within normal 
levels within 7 days after it occurs; 
 
Treatment may be continued after any of the following hematologic toxicities, regardless of 
causality: 
 
1.  Grade ≥ 3 lymphopenia or leukopenia in the absence of neutropenia; 
 
2.  Grade ≤ 4 neutropenia (in the absence of fever) that resolves to ≤ Grade 2 or patient’s 
baseline within 5 days; 
 
3.  Grade ≤ 4 thrombocytopenia that resolves to Grade ≤ 2 or patient’s baseline within 5 
days; 
 
4.  Grade ≤ 4 anemia in a patient who was transfusion dependent at study entry, or had a 
history of hemolysis. 
 
Treatment will continue until maximal duration of maintenance therapy is reached (twelve 
28-day cycles), or the occurrence of any of the following events: 
 
1.  Disease progression.   
 
2.  Adverse event(s) that, in the judgment of the PI/medical monitor, may cause severe or 
permanent harm or which rule out continuation of MEDI-551; 
 
3.  Graft failure; 
 
4.  Development of Grade III-IV acute GVHD; 
 
5.  Development of severe chronic GVHD; 
 
6.  Suspected pregnancy; 
 
7.  Inability to start planned cycle of MEDI-551 within 56 days of intended start date of each 
cycle; 
 
8.  Major violation of the study protocol (to include subject noncompliance with study 
medications or protocol-specified procedures) at the discretion of the Protocol Officer; 

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9.  Withdrawal of consent; 
 
10.  The subject is lost to follow up; 
 
11.  Death 
 
12.  Patient is unable to complete 12 cycles of maintenance therapy within 18 months of 
initiating maintenance therapy. 
 
5.3 
Supportive care 
 
5.3.1 Patients will receive transfusions, nutritional support, infection prophylaxis and treatment, 
and other supportive care according to standard of care and institutional guidelines.   
 
5.3.2 Anti‐ovulatory treatment 
 
Menstruating females should begin an anti‐ovulatory agent before starting the preparative 
regimen. 
 
5.3.3 Intravenous access 
 
A central venous catheter is required for administration of IV medications and blood products. 
 
5.3.4 Infection prophylaxis 
 
Patients will receive infection prophylaxis and treatment according to institutional guidelines.  
Infection prophylaxis should include agents or strategies to prevent herpes simplex, CMV, 
Pneumocystis jirovecii, fungal infections, and infections from oral flora secondary to mucositis. 
 
Post-transplantation immunizations will be given per institutional standard. 
 
5.3.5  Antiemetics 
 
Note that steroids should not be used as an antiemetic agent after the graft is infused, until at least 
24 hours after the completion of all PTCy. The use of steroids as antiemetics after this time frame 
is discouraged in the absence of relapsed/progressive disease. 
 
 
6 
MEASUREMENT OF EFFECT 
 
6.1 
Disease and survival endpoints 
 
6.1.1 Survival outcomes 
 
Progression‐free survival (PFS): Interval from NM-AlloSCT Day 0 to date of first objective 
disease progression or relapse, unplanned treatment for disease persistence, or death 
from any cause.  Patients without these failures will be censored at the last date they were 
assessed and deemed failure‐free.  Disease persistence in the absence of progression is 
not considered a PFS failure unless it leads to treatment. 
 
Disease‐free survival (DFS): Interval from NM-AlloSCT Day 0 to date of first objective 
detection of disease persistence, progression or relapse, or death from any cause.  

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Patients without such failures will be censored at the last date they were assessed and 
deemed failure‐free.  Disease persistence posttransplantation, followed by disappearance 
of detectable disease in the absence of treatment, is not considered a DFS failure. 
 
Overall survival (OS):  Interval from NM-AlloSCT Day 0 to date of death from any cause or 
last patient contact. 
 
Nonrelapse mortality (NRM):  Death without evidence of disease progression or relapse. 
Relapse/progression is a competing risk for NRM. 
 
6.1.2 Disease response 
 
Response will be assessed using the International Myeloma Working Group Uniform 
Response Criteria.50  Until disease progression, all disease classifications are relative to 
the patient’s disease status prior to NM-AlloSCT.  At each time point where response is 
assessed, patients will undergo serum protein electrophoresis, 24 hour urine protein 
electrophoresis and serum light chain analysis.  If electrophoresis is negative, 
immunofixation will be performed and if negative, an additional bone marrow aspiration and 
biopsy will be performed as clinically indicated to assess response. 
 
MEDI-551, like other monoclonal antibody therapeutics, has the potential to interfere with 
serum protein electrophoresis and immunofixation assays.  Reflex assays may be 
conducted to differentiate MEDI-551 from M protein. 
 
Stringent complete remission (sCR):  Requires all of the following: 
a.  All criteria for complete remission (CR) listed below with the addition of normal 
serum free light chain ratio; 
b.  Absence of clonal plasma cells on bone marrow as demonstrated by 
immunohistochemistry or flow cytometry 
 
Complete remission (CR):  Requires all of the following:  
a.  Negative serum and urine electrophoresis and immunofixation; 
b.  Disappearance of any soft tissue plasmacytomas; 
c.  ≤5% plasma cells on bone marrow aspiration and biopsy 
 
Very good partial remission (VGPR):   
 
Serum and / or urine M protein detectable by immunofixation but not 
electrophoresis or ≥ 90% reduction in serum M protein and urine M protein ≤ 100mg 
per 24 hours 
 
Partial remission (PR):  Requires: 
a.  ≥ 50% reduction in serum M protein and reduction in urine M protein is ≥ 90% or 
to ≤ 200mg per 24 hours; 
b.  If the serum M protein is ≤ 1g/dL and urine M protein ≤ 200mg per 24 hours, 
subjects must have a > 50% decrease in the difference between involved and 
uninvolved serum light chain levels to be deemed a partial remission; 
c.  If the serum M protein is ≤1 g/dL and urine M protein ≤200 mg per 24 hours and 
serum light chain levels are ≤100mg/L of the involved light chain, then ≥ 50% 
reduction in plasma cells on bone marrow biopsy is required to classify a partial 
remission.  This criterion may only be used if ≥ 30% plasma cells are present on the 
baseline bone marrow biopsy; 
d.  In addition, if present, a ≥ 50% reduction in the size of soft tissue 
plasmacytomas is required. 

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Stable disease (SD):   
Not meeting criteria for sCR, CR, VGPR, PR or progressive disease 
 
Progressive disease (PD) for patients not achieving a complete remission (CR):  Any one 
or more of the following: 
a.  ≥ 25% rise in serum M protein with an absolute rise of a least 0.5g/dL; 
b.  ≥ 25% rise in urine M protein with an absolute rise of a least 200mg per 24 
hours; 
c.  ≥ 25% rise in bone marrow plasma cell percentage with an absolute value of at 
least 10%; 
d.  Definite development of new bone lesions or plasmacytomas or definite increase 
in the size of existing bone lesions or soft tissue plasmacytomas; 
e.  Development of hypercalcemia (calcium > 11.5mg/dL) that definitely be 
attributed to the plasma cell neoplasm. 
 
Relapse from complete remission (CR):  Any one or more of the following: 
a.  Reappearance of serum or urine M protein by electrophoresis or 
Immunofixation; 
b.  Development of ≥ 5% plasma cells on bone marrow biopsy; 
c.  Appearance of any other sign of progression (plasamcytoma, new bone lesions, 
hypercalcemia) 
 
6.2 
Transplant related outcomes  
 
6.2.1  Graft‐versus‐host disease (GVHD) 
 
1.  Acute GVHD:  
Acute GVHD is graded by standard criteria.  All suspected cases of acute GVHD must be 
confirmed histologically by biopsy of an affected organ (e.g., skin, liver, or gastrointestinal 
tract).  Date of symptom onset, date of biopsy confirmation of GVHD, maximum clinical 
Grade, sites affected, and dates and types of treatment will be recorded.  Dates of 
symptom onset of initial diagnosis of GVHD (even if non‐severe) and Grade III‐IV GVHD 
will be recorded. 
 
The cumulative incidences of acute Grade 3-4 and Grade 3-4 chronic GVHD will be 
determined through competing risk analysis.  Treatment of disease 
relapse/progression/persistence (with the exception of planned maintenance or 
consolidative therapy), graft failure, and death are considered competing risks for GVHD 
for study purposes.   
 
2.  Chronic GVHD:  
Chronic GVHD is graded by both NIH consensus criteria and Seattle criteria.  Date of 
onset, date of biopsy confirmation (if any), dates and types of treatment, and extent will be 
recorded. The cumulative incidence of chronic GVHD (overall and according to extent) will 
be determined through competing risk analysis. 
 
6.2.2 Toxicity 
 
All Grades ≥ 3 toxicities according to CTCAE, version 4 will be tabulated. 
 
6.3 
Quantification of myeloma precursors 
 

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Studies will be performed to assess the relative burden of MM CSCs prior to MEDI-551 treatment 
(at Day +30, +60, +90, and +120 post-NM-AlloSCT, until MEDI-551 treatment is initiated), over the 
course of MEDI-551 treatment, (start of cycles 2, 4, 6, and 12), and at the 18 month post-
transplant follow-up visit.  MM CSCs will be quantified by flow cytometry of the peripheral blood.  
Peripheral blood mononuclear cells (PBMCs) will be isolated by density centrifugation, then 
stained with the Aldefluor reagent (Stem Cell Technologies) to detect relative ALDH activity and 
monoclonal antibodies directed against CD19, CD27 and kappa or lambda Ig light chains.  A 
control staining reaction using the specific inhibitor of ALDH, diethylaminobenzaldehyde (DEAB), 
will be used to set the acquisition gate containing ALDH+ cells.  Cells that express the putative 
MM CSC phenotype (CD19+CD27+ALDH+) will be gated and analyzed for clonality by evaluating 
surface immunoglobulin light chain expression. 
 
Peripheral blood B cell counts will be evaluated at the same time points. 
 
6.4 
MEDI-551 pharmacokinetic evaluation 
 
Samples for MEDI-551 serum concentration will be collected pre dose on cycle 1 day 1, 8, 15, and 
22, as well as pre dose on the first day of cycles 2, 4, 6, and 12.   
 
Serum samples will be measured for MEDI-551 levels by MedImmune or an approved vendor 
using a validated immunoassay. 
 
6.5 MEDI-551 anti-drug antibody evaluation 
 
Samples for MEDI-551 anti-drug antibodies will be collected prior to dosing on cycle 1 day 1, prior 
to dosing in cycles 2, 6, and 12, and at the 18 month post-transplant follow-up visit. 
 
Samples will be assessed for the presence of anti-MEDI-551 antibodies by MedImmune or an 
approved vendor using a validated drug-tolerant solution-phase bridging assay. Tiered analysis 
will be performed to include screening, confirmatory and titer assay components. 
 
7 
STUDY MONITORING AND DATA COLLECTION 
 
7.1 
Pre-transplant evaluations and requirements 
 
The following observations will be made ≤ 1 month before initiation of conditioning, except where 
noted (Appendix, Table 7.1): 
 
1.  History and physical examination, height and weight; 
 
2.  ECOG performance status; 
 
9.  HLA Typing (donor and recipient) as described in Sections 3.2 and 3.3 (may occur 
anytime prior to conditioning); 
 
3.  CBC with differential and platelet count, serum creatinine, bilirubin, alkaline 
phosphatase, AST and ALT; 
 
4.  Estimated creatinine clearance, using the Cockcroft-Gault formula and actual body 
weight; 
 
5.  Infectious disease markers to include: CMV antibody, Hepatitis panel (HepA Ab, HepB 
SAb, HepB SAg, HepB Core Ab, HepC Ab), herpes simplex virus, syphilis, HIV and HTLV 

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
23
I/II antibody, and varicella zoster; 
 
6.  EKG and LVEF (may be performed ≤ 12 weeks before enrollment); 
 
7.  Pulmonary function tests, including DLCO and FEV1 (may be performed ≤ 12 weeks 
prior to conditioning); 
 
8.  Radiological evaluation of sinuses by CT scan or MRI; 
 
9.  Pregnancy test per institutional practices for females of child-bearing potential. NOTE: 
pregnancy test must be performed ≤ 14 days before enrollment; 
 
10.  Laboratory disease evaluation: 
a.  Quantitative serum immunoglobulin levels; 
b.  Serum protein electrophoresis (SPEP); 
24 hour urine collection to determine creatinine clearance and protein excretion, 
urine electrophoresis (UPEP); 
c.  Immunofixation of urine and serum protein regardless of SPEP and UPEP 
results. 
d.  Serum free light chain ratios (FLC); 
e.  Skeletal bone survey or CT scan to include cranium, axial skeleton and proximal 
long bones 
 
11.  Bone marrow evaluation:  unilateral bone marrow biopsy and aspirate are indicated to 
assess disease status prior to transplantation that may include assessment of minimal 
residual disease (MRD); 
 
12.  Lymphocytotoxic antibody screen 
 
13.  Donor peripheral blood for VNTR or RFLP analysis (may occur anytime prior to 
conditioning). 
 
Results of evaluations performed before study entry as standard of care may be used for 
research purposes and to fulfill study requirements. 
 
7.2 
Post-transplant evaluations and requirements 
 
The following evaluations will be done 14 days prior to initiation of maintenance therapy with 
MEDI-551 (see Table 7.2). 
 
1.  Physical examination and appropriate lab evaluations to assess GVHD and other 
morbidity; 
 
2.  ECOG performance score; 
 
3.  CBC with differential and platelet count; 
 
4.  Liver function test and blood chemistries:  Serum sodium, potassium, chloride, CO2, 
BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT; 
 
5.  Thyroid stimulating hormone (TSH); 
 
6.  Pregnancy test, serum HCG (sensitivity of at least 50mIU/mL); 

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7.  Laboratory disease evaluation: Laboratory disease evaluations performed at Day 60 
and Day 120 post-transplant can be used as evaluations prior to maintenance therapy if 
they are ≤ 14 days prior to the initiation of maintenance therapy 
a.  Quantitative serum immunoglobulin levels; 
b.  Serum protein electrophoresis (SPEP); 
c.  24 hour urine collection to determine creatinine clearance and protein excretion, 
urine electrophoresis (UPEP).  UPEP can be done with a spot urine if the patient 
has no measurable disease in the urine at diagnosis; 
d.  Immunofixation of urine and serum protein regardless of SPEP and UPEP 
results. 
e.  Serum free light chain ratios (FLC); 
 
8.  Bone marrow evaluation: unilateral bone marrow biopsy and aspirate for pathological 
evaluation and minimal residual disease testing by next generation sequencing (for those 
patients in a CR).   
 
9.  Skeletal bone survey or CT scan to include cranium, axial skeleton and proximal long 
bones. 
 
10.  Research peripheral blood specimens for correlative studies including quantification of 
MM CSCs and total B cells will be carried out every 25-30 days starting on Day +30 of NM-
AlloSCT until the initiation of MEDI-551 maintenance.  Samples will be collected just prior 
to the initiation of maintenance therapy with MEDI-551 unless carried out within the prior 14 
days.  
 
7.3 
Pre-maintenance evaluations and requirements    
 
 
The following evaluations will be done 14 days prior to initiation of maintenance therapy with 
MEDI-551 (see Table 7.2). 
 
1.  Physical examination and appropriate lab evaluations to assess GVHD and other 
morbidity; 
 
2.  ECOG performance score; 
 
3.  CBC with differential and platelet count; 
 
4.  Liver function test and blood chemistries:  Serum sodium, potassium, chloride, CO2, 
BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT; 
 
5.  Viral hepatitis tests if a history of hepatitis B or C 
 
6.  Thyroid stimulating hormone (TSH); 
 
7.  Pregnancy test, serum HCG (sensitivity of at least 50mIU/mL); 
 
8.  Laboratory disease evaluation: Laboratory disease evaluations performed at Day 60 
and Day 120 post-transplant can be used as evaluations prior to maintenance therapy if 
they are ≤ 14 days prior to the initiation of maintenance therapy 
a.  Quantitative serum immunoglobulin levels; 
b.  Serum protein electrophoresis (SPEP); 

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c.  24 hour urine collection to determine creatinine clearance and protein excretion, 
urine electrophoresis (UPEP).  UPEP can be done with a spot urine if the patient 
has no measurable disease in the urine at diagnosis; 
d.  Immunofixation of urine and serum protein regardless of SPEP and UPEP 
results. 
e.  Serum free light chain ratios (FLC); 
 
9.  Bone marrow evaluation: unilateral bone marrow biopsy and aspirate are required only 
to confirm CR in patients. 
 
10.  Skeletal bone survey or CT scan to include cranium, axial skeleton and proximal long 
bones. 
 
11.  Research peripheral blood specimens for correlative studies including quantification of 
MM CSCs, total B cells, just prior to the initiation of maintenance therapy with MEDI-551 
unless carried out within the prior 14 days.  
 
7.4   
Evaluations during maintenance therapy with MEDI-551 
 
Upon initiation of maintenance with MEDI-551, weekly laboratory monitoring and GVHD 
assessment is required during cycles 1 and 2.  Laboratory monitoring is required once every cycle 
for all cycles thereafter.  Patient visits are mandatory for planned cycles 1-12 and 28 days after the 
last dose of MEDI-551, unscheduled visits and laboratory monitoring may take place as needed. 
Evaluations may occur within one calendar day before or after the planned visit date for cycles 1 
and 2, and within seven calendar days before or after the planned visit date for cycles 3 through 
12. 
 
The following required observations are after initiation of maintenance therapy.  These evaluations 
will occur as indicated below and in Tables 7.3a, 7.3b, and 7.3c. 
 
1.  Physical examination and appropriate lab evaluations to assess acute and chronic 
GVHD and other morbidities monthly; 
 
2.  CBC with differential, platelet count weekly for cycle 1, every other week for cycle 3, and 
monthly otherwise; 
 
3.  Liver function test and blood chemistries:  Serum sodium, potassium, chloride, CO2, 
BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT for cycle 1 and 
monthly otherwise; 
 
4.  Laboratory disease evaluation required every 2 months: 
a.  Quantitative serum immunoglobulin levels; 
b.  Serum protein electrophoresis (SPEP); 
c.  24 hour urine collection to determine creatinine clearance and protein excretion, 
urine electrophoresis (UPEP).  UPEP can be done with a spot urine if the patient 
has no measurable disease in the urine at diagnosis; 
d.  Immunofixation of urine and serum protein regardless of SPEP and UPEP 
results. 
e.  Serum free light chain ratios (FLC); 
 
5. Bone marrow evaluation: unilateral bone marrow biopsy and aspirate for pathological 
evaluation and minimal residual disease testing by next generation sequencing (for those 
patients in a CR) at 60, 180, 365 days post-transplant. 

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6.  Thyroid stimulating hormone (TSH) to be obtained at Cycles 1, 4, 7, 10, and the EOT. 
 
7.  Skeletal survey or CT scan to include cranium, axial skeleton and proximal long bones 
is required ≤ 28 days of the last dose of maintenance, but otherwise may be performed as 
clinically indicated during the course of the study at the discretion of the transplant 
physician. 
 
8.  Sorted or unsorted chimerism analysis (peripheral blood or bone marrow) every six 
months during treatment with maintenance study drug, and as otherwise clinically 
indicated, at the discretion of the physician. (The chimerism analysis technique (sorted or 
unsorted) is at the discretion of the attending physician but must be utilized consistently 
while on MEDI-551). 
 
9.  Assessment and appropriate lab evaluations for toxicities at Cycles 1, 2, 3, 4, 6, 9, 12 
and ≤ 28 days after the last dose of MEDI-551. 
 
10.  Research peripheral blood specimens for correlative studies including quantification of 
MM CSCs and total B cells at the beginning of cycle 2, 3, 5, 7, and 10, and the EOT. 
 
11. MEDI-551 PK: pre-dose on Cycle 1 Day 1, Day 8, Day 15, and Day 22; pre-dose at the 
start of Cycles 2, 4, 6, and 12.    
 
12. MEDI-551 anti-drug antibodies (ADA): prior to the first dose on Cycle 1 Day 1, pre-dose 
at the start of Cycle 2, 6, and 12.  
 
7.5 
Evaluations post-maintenance therapy with MEDI-551 
 
The following evaluations will occur after cycle 12 of MEDI-551 maintenance as indicated below 
and in Table 7.4. Evaluations may occur within one week before or after the planned visit date. 
 
1.  Physical examination and appropriate lab evaluations to assess acute and chronic 
GVHD at 18 months, and 2 years post-transplant; 
 
2.  CBC with differential, platelet count at 6 months, 18 months, and 2 years post- 
transplant; 
 
3.  Laboratory disease evaluation: 
a.  Quantitative serum immunoglobulin levels; 
b.  Serum protein electrophoresis (SPEP); 
c.  24 hour urine collection to determine creatinine clearance and protein excretion, 
urine electrophoresis (UPEP).  UPEP can be done with a spot urine if the patient 
has no measurable disease in the urine at diagnosis; 
d.  Immunofixation of urine and serum protein regardless of SPEP and UPEP 
results. 
e.  Serum free light chain ratios (FLC); 
f.   Skeletal bone survey or CT scan to include cranium, axial skeleton and proximal 
long bones 
 
4.  Bone marrow evaluation: unilateral bone marrow biopsy and aspirate are required only 
to confirm CR in patients that will include minimal residual disease testing. 
 
5.  Assessment for toxicities. 

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6.  Research peripheral blood specimens for correlative studies including quantification of 
MM CSCs and B cells at 18 and 24 months post-transplant. 
 
7.6   
Study monitoring 
 
This is a JHU-investigator-sponsored IND or IDE trial, DSMP Level III per the JHU SKCCC DSMP.  
Data monitoring of this protocol will occur on a regular basis with the frequency dependent on the 
rate of subject accrual and the progress of the study.  The protocol will be monitored internally at 
SKCCC by the principal investigator and the SKCCC CRO in accordance with SKCCC guidelines.  
The SKCCC Safety Monitoring Committee requires all DSMP Level I-IV study teams to maintain a 
study-specific master adverse event log and a protocol deviation log in Excel format.  Templates 
available here: http://cro.onc.jhmi.edu/.  
 
The PI/sub-investigator or his designee will be responsible for completing, in a timely manner, an 
electronic Case Report Forms (eCRFs) for each patient who is registered to participate in this 
study. eCRFs should be completed within 10 days after the date of study visit, or as information 
becomes available.  The PI or a sub-investigator will sign and date the indicated places on the 
eCRF.  This signature will indicate that a thorough inspection of the audited data therein has been 
made and will thereby certify the contents of the form.  
 
The PI is responsible for internally monitoring the study and establishing additional external data & 
safety monitoring oversight, as required. The PI will also monitor the progress of the trial, review 
safety reports, and confirm that the safety outcomes and response assessments favor continuation 
of the study. 
8 
RISK and REPORTING REQUIREMENTS 
 
8.1 
Possible adverse effects of medications 
 
8.1.1 Cyclophosphamide (Cytoxan®) 
 
Cyclophosphamide is an alkylating agent whose metabolites form cross-links with DNA 
resulting in cell cycle-nonspecific inhibition of DNA synthesis and function.  
Cyclophosphamide side effects include: nausea, vomiting, diarrhea, headache, dizziness, 
hemorrhagic cystitis, fluid weight gain/edema, SIADH, transaminitis, cardiomyopathy, 
pericarditis, rash, mucositis, alopecia, cytopenias, sterility, and rarely, secondary 
myelodysplastic syndrome and anaphylaxis. 
 
8.1.2 Mesna (sodium-2-mercapto ethane sulphonate) 
 
Mesna is a prophylactic agent used to prevent hemorrhagic cystitis induced by the 
oxasophosphorines (cyclophosphamide and ifosphamide). It has no intrinsic cytotoxicity 
and no antagonistic effects on chemotherapy.  Mesna binds with acrolein, the urotoxic 
metabolite produced by the oxasophosphorines, to produce a non-toxic thioether and slows 
the rate of acrolein formation by combining with 4-hydroxy metabolites of 
oxasophosphorines. 
 
The total daily dose of mesna is equal to 80% of the total daily dose of cyclophosphamide.  
At the doses used for uroprotection, mesna is virtually non-toxic. However, potential 
adverse effects include nausea and vomiting, diarrhea, abdominal pain, altered taste, rash, 
urticaria, headache, joint or limb pain, hypotension, and fatigue. 
 

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8.1.3 Fludarabine (Fludara) 
 
Fludarabine is a purine analog antimetabolite. Side effects of fludarabine include: 
 
a.  Neurotoxicity:  Agitation or confusion, blurred vision, loss of hearing, peripheral 
neuropathy or weakness have been reported. Severe neurologic effects, including 
blindness, coma, and death may occur; severe CNS toxicity is rarely seen with 
doses in the recommended range for non-transplant therapy.  The dose used in this 
study is approximately 1.5 times the usual one-course dose given in non-transplant 
settings. Doses and schedules similar to those used in this study have been used in 
adult and pediatric patients without observed increase in neurotoxicity. 
 
b.  Anemia:  Life-threatening and sometimes fatal autoimmune hemolytic anemia has 
been reported after one or more cycles of therapy in patients with or without a 
previous history of autoimmune hemolytic anemia or a positive Coombs’ test and 
who may or may not be in remission.  Corticosteroids may or may not be effective 
in controlling these episodes.  The majority of patients re-challenged developed a 
recurrence of the hemolytic process. 
 
c.  Cardiovascular:  Deep venous thrombosis, phlebitis, transient ischemic attack, 
and aneurysm (1%) are reported. 
 
  
d.  Fever:  60% develop fever. 
 
  
e.  Rash:  15% develop a rash, which may be pruritic. 
 
f.  Gastrointestinal side effects include:  nausea/vomiting (36%), diarrhea (15%), 
stomatitis (9%), anorexia (7%), GI bleeding and esophagitis (3%), mucositis (2%), 
liver failure, abnormal liver function test, constipation, dysphagia (1%) and mouth 
sores. 
 
g.  Other effects include:  Chills (11%), peripheral edema (8%), myalgias (4%), 
osteoporosis (2%), pancytopenia, arthralgias (1%), dysuria (4%), urinary tract 
infection and hematuria (2%); renal failure, abnormal renal function test, and 
proteinuria (1%); and, very rarely, hemorrhagic cystitis and pulmonary toxicity. 
 
8.1.4 Total Body Irradiation (TBI) 
 
TBI can cause: nausea and vomiting, diarrhea, parotitis (rapid onset within 24-48 hours, 
usually self-limited), generalized mild erythema (usually within 24 hours, resolving in 48-
72 hours), hyperpigmentation, fever, mucositis, alopecia, and pancytopenia.  Late 
effects include: cataracts (10- 20%), hypothyroidism, nephropathy, interstitial 
pneumonitis, veno-occlusive disease, carcinogenesis, and sterility. 
 
8.1.5 Mycophenolate Mofetil (MMF, Cellcept®) 
 
MMF is an ester prodrug of the active immunosuppressant mycophenolic acid. 
Side effects include:  pancytopenia, infection (including sepsis, CMV, HSV, VZV, and 
Candida), nausea, vomiting, diarrhea, allergic reactions, hypertension, headache, 
dizziness, insomnia, hyperglycemia, electrolyte imbalances, rash, and leg cramps/bone 
pain. 
 
Drug interactions:  MMF activity is decreased with oral antacids and cholestyramine.  

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There are no pharmacokinetic interactions with cotrimoxazole, oral contraceptives, or 
cyclosporine. Acyclovir or ganciclovir blood levels may increase due to competition for 
tubular secretion. High doses of salicylates or other highly protein-bound drugs may 
increase the free fraction of MPA and exaggerate the potential for myelosuppression. 
 
8.1.6 Tacrolimus (FK-506, Prograf®) 
 
Tacrolimus is a macrolide immunosuppressant that inhibits lymphocytes through 
calcineurin inhibition.  There is a spectrum of well-described toxicities of tacrolimus, 
including:  renal insufficiency, hypertension, hyperglycemia, hypomagnesemia, 
hypokalemia, nausea, diarrhea, headache, neurologic toxicity including tremor and 
leukoencephalopathy, infection, and rarely thrombotic thrombocytopenic purpura (TTP). 
 
Drug interactions:  Tacrolimus is well absorbed orally. Tacrolimus is extensively 
metabolized by the cytochrome P-450 (CYP3A4) system and metabolized products are 
excreted in the urine. Drugs that may increase tacrolimus levels include tri-azole drugs 
(especially voriconazole and posaconazole), nephrotoxic drugs, calcium channel 
blockers, cimetidine and omeprazole, metoclopramide, macrolide antibiotics, 
quinupristin/dalfopristin, danazol, ethinyl estradiol, methylprednisolone, and HIV 
protease inhibitors. Drugs that may decrease tacrolimus levels include some 
anticonvulsants (phenobarbital, phenytoin, carbamazepine), caspofungin, rifamycins, 
and St. John’s wort. 
 
8.1.7 MEDI-551 
 
MEDI-551 is a humanized afucosylated IgG1 kappa monoclonal antibody directed 
against CD19.  The potential risks of MEDI-551 include hypersensitivity, tumor 
lysis syndrome, cytopenias (neutropenia, thrombocytopenia, anemia), serious 
infections (viral reactivation, opportunistic infections, progressive multifocal 
leukoencephalopathy [PML]) and, for combination with chemotherapy, intestinal 
obstruction and perforation.  Infusion-related reaction is an identified risk of MEDI-
551.  
 
8.2 
Toxicity grading 
 
Toxicities are graded using the NCI’s Common Terminology Criteria for Adverse Events (CTCAE) 
Version 4.0. (http://ctep.cancer.gov/protocolDevelopment/electronic_applications/ctc.htm) 
 
8.3 
Toxicity reporting 
 
The agents used during NM-AlloSCT  have well‐defined toxicity profiles (see Section 8).  In 
addition, there are many expected toxicities of NM-AlloSCT.  The following are examples of 
toxicities that are serious but not unexpected: Grade 4 cytopenias, neutropenic fever and sepsis, 
bacterial, fungal, or viral (including CMV, BK virus) infection, severe mucositis, severe GVHD, 
hepatic veno‐occlusive disease, pulmonary toxicities, hemorrhagic cystitis, bleeding without 
hemodynamic compromise. 
 
For study purposes, the following will be recorded and reported in accordance with IRB 
requirements: 
1.  Any hospitalization and its reason in the first year of transplant, with the exception of 
hospitalizations related to relapsed disease or second HSCTs; 
2.  Neutropenic fever is an expected, common complication; as such, hospitalizations for 

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30
Grade 4 neutropenic fever will be reported in real‐time to the IRB with hospitalizations for 
lesser Grade neutropenic fever routinely reported on a yearly basis; 
3.  Any death before Day +200 following NM-AlloSCT, and any later death which is 
potentially transplant‐related; 
4.  Any unexpected, serious events deemed significant by the PI. 
 
In addition, the following toxicities will be tracked for study purposes and reported on a yearly 
basis to the IRB, or earlier if warranted: 
1.  Clinically significant infections during the first year of transplant, with the exception of 
uncomplicated, culture‐negative neutropenic fever.  This includes CMV disease, other 
clinically significant documented viral infections, bacterial infections, and proven or 
probable invasive fungal infections; 
2.  CMV reactivation (including asymptomatic reactivation); 
3.  Hepatic veno‐occlusive disease; 
4.  Grade 3 or greater pulmonary toxicity during the first year of transplant that is potentially 
transplant‐related; 
 
Additional complications and toxicities may be tracked.  This is in addition to evaluating 
hematologic parameters, GVHD, and disease and survival endpoints outlined in Section 6. 
 
8.3.1 FDA Reporting of Adverse Events 
 
All FDA reporting of adverse events will be conducted in accordance with 21 CFR part 312 and 21 
CFR part 320. 
 
Unexpected Adverse Event: An AE is considered unexpected if the specificity or severity of it is not 
consistent with the applicable product information (e.g., Investigator’s Brochure (IB) for an 
unapproved investigational product or package insert/summary of product characteristics for an 
approved product).  Unexpected also refers to AEs that are mentioned in the IB as occurring with a 
class of drugs or as anticipated from the pharmacological properties of the drug, but are not 
specifically mentioned as occurring with the particular drug under investigation.   
 
Unexpected fatal or life-threatening suspected adverse reactions will be reported to the FDA with 
MedWatch Form 3500A within 7 calendar days of initial receipt of the event information. 
 
Any other suspected adverse reactions to MEDI-551 will be reported to the FDA within 15 calendar 
days of initial receipt of the event information. 
 
8.3.2 Reporting of Adverse Events to AstraZeneca 
 
The sponsor is responsible for submission of adverse events to AstraZeneca in accordance with 
the following guidelines. All event reporting is done via paper correspondence with AstraZeneca. 
 
Suspected Unexpected Serious Adverse Events (SUSARs) will be reported to AstraZeneca 
simultaneously with regulatory submission to the FDA. 
 
Serious Adverse Events (SAEs) will be reported to AstraZeneca on a yearly basis along with an 
annual report. 
 
 
9. 
STATISTICAL CONSIDERATIONS 
 
9.1   
Study design and objectives 

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31
 
The study is designed as a Phase II, non-randomized, single institution prospective study of MEDI-
551 maintenance therapy following NM-AlloSCT for high-risk or relapsed MM.  The premise is that 
MEDI-551 will increase progression-free survival in patients as compared to our historical data in 
MM patients receiving PTCy.  Patients will be enrolled prior to initiation of the conditioning 
regimen.  Patients who are eligible at 60-120 days post-transplant will receive MEDI-551 
maintenance therapy and evaluated for the primary endpoint of progression-free survival.  Patients 
who are transplanted but do not receive MEDI-551 will be followed for secondary endpoints.  The 
target sample size is 36 patients.  We assume that 10% of patients will fail to meet criteria to 
initiate maintenance MED-551 and so plan to enroll 40 patients receiving NM-AlloSCT in order to 
achieve the targeted number of evaluable patients. 
 
9.2   
Accrual 
 
It is estimated that two years of accrual will be necessary to enroll the targeted sample size.  
 
9.3   
Primary endpoint 
 
Determine the progression free survival (PFS) of high-risk or relapsed MM patients undergoing 
non-myeloablative bone marrow allogeneic transplantation (NM-AlloSCT) followed by maintenance 
therapy with MEDI-551. We will estimate the median PFS using the method of Kaplan and Meier 
and derive 90%CI with Bookmeyer-Crowley.  To estimate whether treatment with MEDI-551 
improves PFS we will determine whether the lower interval of the 90%CI excludes the null value 
for median PFS. 
 
 
9.4   
Sample size and power calculation 
 
We calculated sample size using the formula described in Lawless: equation 3.2.7 (page 108) of 
Lawless (1982) (Statistical Models and Methods for Lifetime Data, John Wiley and Sons).  Sample 
size calculation is based on the assumptions of uniform accrual over time, no loss to follow-up, 
exponentially distributed event times, and use of the exponential MLE test.  
 
We assumed the following values for calculating sample size using a one-sided test:   
Length of accrual period = 24 months  
Length of follow-up period-time from end of accrual to analysis = 24 months 
Type-I error = .10  
Type-II error = .20 
 
Median PFS for the historical rate (Null) = 14 months 
Median PFS under the new treatment (alternative hypothesis) =  21 months 
 
We calculated a sample size of 37 subjects. 
 
9.5.   Analysis of secondary endpoints 
 
In addition to primary endpoint of PFS, we will also estimate the 3-year overall survival (OS) using 
Kaplan-Meier (KM) method.  Cumulative incidences of relapse and non-relapse mortality will be 
estimated separately using Gray’s method for competing risks.  
 
9.6.  
Toxicities  
 

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The cumulative incidence of acute (grade II-IV, grade III-IV) and chronic GVHD (overall, and by 
extent) will be estimated through competing-risk analysis, wherein treatment of 
relapse/progression, graft failure, and death are competing risks for GVHD. These will be reported 
overall and according to HLA match or mismatch status.  We also plan to report the cumulative 
incidence of GVHD with only graft failure and death regarded as competing risks.  The cumulative 
incidence of systemic steroid initiation, the cumulative incidence of non-steroid 
immunosuppression use, and the cumulative incidence of discontinuation of systemic 
immunosuppression for GVHD treatment will be similarly estimated using competing-risk analyses, 
wherein graft failure and death, or graft failure, death and treatment of relapse/progression, are 
considered competing risks.  The number and types of systemic immunosuppression used for 
GVHD treatment will be reported descriptively. Toxicities will be monitored until the end of the 
MEDI-551 treatment period. 
 
9.7.  
Early stopping guidelines for toxicity 
 
Toxicity will be monitored after each transplant recipient up to a maximum of 36 patients. A patient 
who experiences wither GVHD or does before relapsing would be counted towards toxicity. The 
stopping rule for toxicity will hold enrollment if the posterior probability of toxicity being > 30% 
exceeds 0.70.  The prior for this toxicity monitoring rule is a beta(1,5) distribution.  This means that 
our prior guess at the proportion of severe toxicities is 16.7%, and there is a 90% probability that 
this proportion is between 1.0% and 45.1%.  Table 9.1 shows the results of this rule.  For example, 
the rule calls for pausing the study if, for example, 3 out of the first 3 patients, or 4 out of the first 5 
to 7 patients develop toxicity. 
 
 
 
 
Table 9.2 shows the percent of time that the stopping rule will terminate the study under different 
hypothetical risks of toxicity.  These calculations are based on 10,000 simulations. 
 
Table 9.1 Stopping rules 
for toxicity 
Number of 
patients with 
toxicity  
Number of 
evaluable 
patients 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
3-43-4 
5-7 
8-10 
11-13 
14-16 
17-19 
20-22 
23-25 
26-28 
29-31 
32-35 
36 
 

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33
Table 9.2 Operating 
characteristics of safety 
monitoring rules 
True 
proportion 
with the 
toxicity 
Probability of 
stopping 
20% 
25% 
30% 
35% 
40% 
50% 
9.3% 
21% 
40% 
62% 
80% 
98% 
 
 
10 
PATHOLOGY REVIEW 
 
Specimens diagnostic of MM (from the original diagnosis and/or relapse) must be reviewed by the 
Johns Hopkins Department of Pathology prior to starting protocol therapy.   
 
11  
RECORDS TO BE KEPT 
 
Records to be filed include the following: 
1.  Patient consent form; 
2.  Registration form; 
3.  Eligibility checklist(s); 
4.  Case report forms; 
5.  Adverse event report form(s); 
6.  Follow‐up assessments 
 
The principal investigator will review case report forms on a regular basis.  Case report forms will 
be supported by primary source documents. 
 
12 
PATIENT CONSENT AND PEER JUDGMENT 
 
Current federal, NCI, state, and institutional regulations regarding informed consent will be 
followed.  More frequent monitoring of disease status, vital status, and toxicities may be performed 
for study purposes including through collection of outside records and patient and physician 
contact. Patients who relapse or progress will continue to be followed on study unless consent is 
withdrawn. 
 

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13 
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4.  Mellstedt H, Hammarström S, Holm G. Monoclonal lymphocyte population in human plasma 
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CD45 isoforms defines CALLA+ monoclonal B- lineage cells in peripheral blood from myeloma 
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7.  Jensen GS, Belch AR, Kherani F, Mant MJ, Ruether BA, Pilarski LM. Restricted expression of 
immunoglobulin light chain mRNA and of the adhesion molecule CD11b on circulating monoclonal 
B lineage cells in peripheral blood of myeloma patients. Scand J Immunol (1992).  36:843-53. 
8.  Pilarski LM, Jensen GS. Monoclonal circulating B cells in multiple myeloma. A continuously 
differentiating, possibly invasive, population as defined by expression of CD45 isoforms and 
adhesion molecules. Hematology/Oncology Clinics of North America (1992).  6:297-322. 
9.  Bakkus MH, Van RI, Van Camp B, Thielemans K. Evidence that the clonogenic cell in multiple 
myeloma originates from a pre-switched but somatically mutated B cell. BrJHaematol (1994).  
87:68-74. 
10.  Pilarski LM, Belch AR. Circulating monoclonal B cells expressing P glycoprotein may be a 
reservoir of multidrug-resistant disease in multiple myeloma. Blood (1994).  83:724-36. 
11.  Bergsagel PL, Smith AM, Szczepek A, Mant MJ, Belch AR, Pilarski LM. In multiple myeloma, 
clonotypic B lymphocytes are detectable among CD19+ peripheral blood cells expressing CD38, 
CD56, and monotypic Ig light chain. Blood (1995).  85:436-47. 
12.  Szczepek AJ, Seeberger K, Wizniak J, Mant MJ, Belch AR, Pilarski LM. A high frequency of 
circulating B cells share clonotypic Ig heavy-chain VDJ rearrangements with autologous bone 
marrow plasma cells in multiple myeloma, as measured by single-cell and in situ reverse 
transcriptase-polymerase chain reaction. Blood (1998).  92:2844-55. 
13.  Rasmussen T, Kastrup J, Knudsen LM, Johnsen HE. High numbers of clonal CD19+ cells in 
the peripheral blood of a patient with multiple myeloma. British Journal of Haematology (1999).  
105:265-7. 
14.  Rottenburger C, Kiel K, Bosing T, Cremer FW, Moldenhauer G, Ho AD, Goldschmidt H, Moos 
M. Clonotypic CD20+ and CD19+ B cells in peripheral blood of patients with multiple myeloma 
post high-dose therapy and peripheral blood stem cell transplantation. BrJHaematol (1999).  
106:545-52. 
15.  Rasmussen T, Jensen L, Johnsen HE. Levels of circulating CD19+ cells in patients with 
multiple myeloma. Blood (2000).  95:4020-1. 
16.  Pilarski LM, Hipperson G, Seeberger K, Pruski E, Coupland RW, Belch AR. Myeloma 
progenitors in the blood of patients with aggressive or minimal disease: engraftment and self-
renewal of primary human myeloma in the bone marrow of NOD SCID mice. Blood (2000).  
95:1056-65. 
17.  Drewinko B, Alexanian R, Boyer H, Barlogie B, Rubinow SI. The growth fraction of human 
myeloma cells. Blood (1981).  57:333-8. 
18.  Matsui W, Huff CA, Wang Q, Malehorn MT, Barber J, Tanhehco Y, Smith BD, Civin CI, Jones 
RJ. Characterization of clonogenic multiple myeloma cells. Blood (2004).  103:2332-6. 

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Protocol Version Date: November 10, 2017 
 
35
19.  Matsui W, Wang Q, Barber JP, Brennan S, Smith BD, Borrello I, McNiece I, Lin L, Ambinder 
RF, Peacock C, Watkins DN, Huff CA, Jones RJ. Clonogenic Multiple Myeloma Progenitors, Stem 
Cell Properties, and Drug Resistance. Cancer Research (2008).  68:190-7. 
20.  Rasheed ZA, Kowalski J, Smith BD, Matsui W. Concise review: emerging concepts in clinical 
targeting of cancer stem cells. Stem Cells (2011).  29:883-7. 
21.  Peacock CD, Wang Q, Gesell GS, Corcoran-Schwartz IM, Jones E, Kim J, Devereux WL, 
Rhodes JT, Huff CA, Beachy PA, Watkins DN, Matsui W. Hedgehog signaling maintains a tumor 
stem cell compartment in multiple myeloma. Proceedings of the National Academy of Sciences 
(2007).  104:4048-53. 
22.  Brennan SK, Wang Q, Tressler R, Harley C, Go N, Bassett E, Huff CA, Jones RJ, Matsui W. 
Telomerase inhibition targets clonogenic multiple myeloma cells through telomere length-
dependent and independent mechanisms. PLoS ONE (2010).  5. 
23.  Matsui W, Wang Q, Barber JP, Brennan S, Smith BD, Borrello I, McNiece I, Lin L, Ambinder 
RF, Peacock C, Watkins DN, Huff CA, Jones RJ. Clonogenic multiple myeloma progenitors, stem 
cell properties, and drug resistance. Cancer Research (2008).  68:190-7. 
24.  Moreau P, Voillat L, Benboukher L, Mathiot C, Dumontet C, Robillard N, Herault O, Garnache 
F, Garand R, Varoqueaux N, vet-Loiseau H, Harousseau JL, Bataille R. Rituximab in CD20 
positive multiple myeloma. Leukemia (2007).  21:835-6. 
25.  Treon SP, Pilarski LM, Belch AR, Kelliher A, Preffer FI, Shima Y, Mitsiades CS, Mitsiades NS, 
Szczepek AJ, Ellman L, Harmon D, Grossbard ML, Anderson KC. CD20-directed serotherapy in 
patients with multiple myeloma: biologic considerations and therapeutic applications. J 
Immunother (2002).  25:72-81. 
26.  Zojer N, Kirchbacher K, Vesely M, Hubl W. Rituximab treatment provides no clinical benefit in 
patients with pretreated advanced multiple myeloma. Leukemia and Lymphoma (2006).  47:1103-
9. 
27.  Huff CA, Matsui WH, Douglas Smith B, Jones RJ. Strategies to eliminate cancer stem cells: 
clinical implications. European Journal of Cancer (2006).  42:1293-7. 
28.  Jones RJ, Matsui WH, Smith BD. Cancer stem cells: are we missing the target? Journal of the 
National Cancer Institute (2004).  96:583-5. 
29.  Huff C, Wang Q, Rogers K, Jung M, Bolanos-Meade J, Borrello I, Jones R, Matsui W. 
Correlation of clonogenic cancer stem cell (CSC) growth with clinical outcomes in multiple 
myeloma (MM) patients undergoing treatment with high dose cyclophosphamide (Cy) and 
rituximab. AACR Meeting Abstracts (2008).  2008:LB-87. 
30.  Matsui W, Huff CA, Wang Q, Malehorn MT, Barber J, Tanhehco Y, Smith BD, Civin CI, Jones 
RJ. Characterization of clonogenic multiple myeloma cells. Blood (2004).  103:2332-6. 
31.  Bensinger WI, Buckner CD, Anasetti C, Clift R, Storb R, Barnett T, Chauncey T, Shulman H, 
Appelbaum FR. Allogeneic marrow transplantation for multiple myeloma: an analysis of risk factors 
on outcome. Blood (1996).  88:2787-93. 
32.  Badros A, Barlogie B, Siegel E, Cottler-Fox M, Zangari M, Fassas A, Morris C, Anaissie E, 
van Rhee F, Tricot G. Improved outcome of allogeneic transplantation in high-risk multiple 
myeloma patients after nonmyeloablative conditioning. JClinOncol (2002).  20:1295-303. 
33.  Maloney DG, Molina AJ, Sahebi F, Stockerl-Goldstein KE, Sandmaier BM, Bensinger W, 
Storer B, Hegenbart U, Somlo G, Chauncey T, Bruno B, Appelbaum FR, Blume KG, Forman SJ, 
McSweeney P, Storb R. Allografting with nonmyeloablative conditioning following cytoreductive 
autografts for the treatment of patients with multiple myeloma. Blood (2003).  102:3447-54. 
34.  Bruno B, Giaccone L, Festuccia M, Boccadoro M. Role of allogeneic transplantation in 
multiple myeloma in the era of new drugs. Mediterranean journal of hematology and infectious 
diseases (2010).  2:e2010013. 
35.  Kneppers E, van der Holt B, Kersten MJ, Zweegman S, Meijer E, Huls G, Cornelissen JJ, 
Janssen JJ, Huisman C, Cornelisse PB, Bruijnen CP, Emmelot M, Sonneveld P, Lokhorst HM, 
Mutis T, Minnema MC. Lenalidomide maintenance following non-myeloablative allogeneic stem 
cell transplantation in multiple myeloma is not feasible: results of the HOVON 76 trial. Blood 
(2011). 

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Protocol Version Date: November 10, 2017 
 
36
36.  Luznik L, O'Donnell PV, Symons HJ, Chen AR, Leffell MS, Zahurak M, Gooley TA, Piantadosi 
S, Kaup M, Ambinder RF, Huff CA, Matsui W, Bolaños-Meade J, Borrello I, Powell JD, Harrington 
E, Warnock S, Flowers M, Brodsky RA, Sandmaier BM, Storb RF, Jones RJ, Fuchs EJ. HLA-
haploidentical bone marrow transplantation for hematologic malignancies using nonmyeloablative 
conditioning and high-dose, posttransplantation cyclophosphamide. Biology of Blood and Marrow 
Transplantation (2008).  14:641-50. 
37.  Symons HJ, Fuchs EJ. Hematopoietic SCT from partially HLA-mismatched (HLA-
haploidentical) related donors. Bone Marrow Transplantation (2008).  42:365-77. 
38.  Luznik L, Bolaños-Meade J, Zahurak M, Chen AR, Smith BD, Brodsky R, Huff CA, Borrello I, 
Matsui W, Powell JD, Kasamon Y, Goodman SN, Hess A, Levitsky HI, Ambinder RF, Jones RJ, 
Fuchs EJ. High-dose cyclophosphamide as single-agent, short-course prophylaxis of graft-versus-
host disease. Blood (2010).  115:3224-30. 
39.  Ciurea SO, Zhang M-J, Bacigalupo AA, Bashey A, Appelbaum FR, Aljitawi OS, Armand P, 
Antin JH, Chen J, Devine SM, Fowler DH, Luznik L, Nakamura R, O’Donnell PV, Perales M-A, 
Pingali SR, Porter DL, Riches MR, Ringdén OTH, Rocha V, Vij R, Weisdorf DJ, Champlin RE, 
Horowitz MM, Fuchs EJ, Eapen M. Haploidentical transplant with posttransplant 
cyclophosphamide vs matched unrelated donor transplant for acute myeloid leukemia. Blood 
(2015).  126:1033-40. 
40.  Ghosh N, Ye X, Bolanos-Meade J, Fuchs EJ, Luznik L, Jones RJ, Matsui W, Borrello I, Huff 
CA. Allogeneic Blood or Marrow Transplantation with Post-Transplantation Cyclophosphamide as 
Graft-versus-Host Disease Prophylaxis in Multiple Myeloma  
41.  Carpenter PA, Snyder DS, Flowers MED, Sanders JE, Gooley TA, Martin PJ, Appelbaum FR, 
Radich JP. Prophylactic administration of imatinib after hematopoietic cell transplantation for high-
risk Philadelphia chromosome–positive leukemia. Blood (2007).  109:2791-3. 
42.  Antar A, Kharfan-Dabaja MA, Mahfouz R, Bazarbachi A. Sorafenib Maintenance Appears 
Safe and Improves Clinical Outcomes in FLT3-ITD Acute Myeloid Leukemia After Allogeneic 
Hematopoietic Cell Transplantation. Clinical Lymphoma Myeloma and Leukemia (2015).  15:298-
302. 
43.  Chen Y-B, Li S, Lane AA, Connolly C, Del Rio C, Valles B, Curtis M, Ballen K, Cutler C, Dey 
BR, El-Jawahri A, Fathi AT, Ho VT, Joyce A, McAfee S, Rudek M, Rajkhowa T, Verselis S, Antin 
JH, Spitzer TR, Levis M, Soiffer R. Phase I Trial of Maintenance Sorafenib after Allogeneic 
Hematopoietic Stem Cell Transplantation for Fms-like Tyrosine Kinase 3 Internal Tandem 
Duplication Acute Myeloid Leukemia. Biology of Blood and Marrow Transplantation (2014).  
20:2042-8. 
44.  Kanakry JA, Gocke CD, Bolaños-Meade J, Gladstone DE, Swinnen LJ, Blackford AL, Fuchs 
EJ, Huff CA, Borrello I, Matsui WH, Brodsky RA, Rosner GL, Shanbhag S, Luznik L, Jones RJ, 
Ambinder RF, Kasamon YL. Phase II Study of Nonmyeloablative Allogeneic Bone Marrow 
Transplantation for B Cell Lymphoma with Post-Transplantation Rituximab and Donor Selection 
Based First on Non-HLA Factors. Biology of Blood and Marrow Transplantation (2015).  21:2115-
22. 
45.  Ward E, Mittereder N, Kuta E, Sims GP, Bowen MA, Dall’Acqua W, Tedder T, Kiener P, Coyle 
AJ, Wu H. A glycoengineered anti‐CD19 antibody with potent antibody‐dependent cellular 
cytotoxicity activity in vitro and lymphoma growth inhibition in vivo. British Journal of Haematology 
(2011).  155:426-37. 
46.  Herbst R, Wang Y, Gallagher S, Mittereder N, Kuta E, Damschroder M, Woods R, Rowe DC, 
Cheng L, Cook K. B-cell depletion in vitro and in vivo with an afucosylated anti-CD19 antibody. 
Journal of Pharmacology and Experimental Therapeutics (2010).  335:213-22. 
47.  Goswami T, Forero A, Hamadani M, Sonet A, Verhoef G, Fanale MA, Bello CM, Huang W, 
Cheson BD. (2012) Phase I/II study of MEDI-551, a humanized monoclonal antibody targeting 
CD19, in subjects with relapsed or refractory advanced B-cell malignancies. Journal of Clinical 
Oncology 30(15).  
48.  Ogura M, Ando K, Uike N, Ogawa Y, Uchida T, Abe Y, Morishita T, Kojima M, Choi I, Yagawa 
K. A multicenter phase I study of the humanized anti-CD19 monoclonal antibody, MEDI-551, in 

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
37
patients with relapsed or refractory B-cell lymphoma and multiple myeloma. Blood (2014).  
124:1756-. 
49.  Hamadani M, Fanale MA, Bello CM, Kipps TJ, Offner F, Verhoef G, Federico M, Gregory SA, 
Sonet A, Assouline S. Safety profile and clinical response to MEDI-551, a humanized monoclonal 
anti-CD19, in a phase 1/2 study in adults with relapsed or refractory advanced B-cell malignancies. 
Blood (2013).  122:1810-. 
50.  Rajkumar SV, Harousseau J-L, Durie B, Anderson KC, Dimopoulos M, Kyle R, Blade J, 
Richardson P, Orlowski R, Siegel D, Jagannath S, Facon T, Avet-Loiseau H, Lonial S, Palumbo A, 
Zonder J, Ludwig H, Vesole D, Sezer O, Munshi NC, San Miguel J. Consensus recommendations 
for the uniform reporting of clinical trials: report of the International Myeloma Workshop Consensus 
Panel 1. Blood (2011).  117:4691-5. 
51.  Rajkumar SV, Dimopoulos MA, Palumbo A, Blade J, Merlini G, Mateos M-V, Kumar S, 
Hillengass J, Kastritis E, Richardson P, Landgren O, Paiva B, Dispenzieri A, Weiss B, LeLeu X, 
Zweegman S, Lonial S, Rosinol L, Zamagni E, Jagannath S, Sezer O, Kristinsson SY, Caers J, 
Usmani SZ, Lahuerta JJ, Johnsen HE, Beksac M, Cavo M, Goldschmidt H, Terpos E, Kyle RA, 
Anderson KC, Durie BGM, Miguel JFS. International Myeloma Working Group updated criteria for 
the diagnosis of multiple myeloma. The Lancet Oncology (2014).  15:e538-e48. 
 
 
 

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Protocol Version Date: November 10, 2017 
 
38
14 
 APPENDICES  
14.1 
Appendix A.  Diagnostic criteria for multiple myeloma51  
Clonal bone marrow plasma cells ≥10% of biopsy-proven bony or extramedullary plasmacytoma* 
and any one or more of the following myeloma-defining events: 
 
 
Evidence of end-organ damage that can be attributed to the underlying plasma cell 
proliferative disorder, specifically:  
o 
Hypercalcemia: serum calcium > 0.25mmol/L (> 1mg/dL) higher than the upper 
limit of normal or > 2.75mmol/L (>11mg/dL)  
o 
Renal insufficiency: creatinine clearance < 40mL per min or serum creatinine > 
177µmol/L (> 2mg/dL)  
o 
Anemia: hemoglobin value of > 20g/L below the lower limit of normal, or a 
hemoglobin value < 100g/L  
o 
Bone lesions: one or more osteolytic lesions on skeletal radiography, CT, or PET-
CT 
 
Any one or more of the following biomarkers of malignancy:  
o 
Clonal bone marrow plasma cell percentage ≥ 60%  
o 
Involved:uninvolved serum free light chain ratio ≥100  
o 
>1 focal lesions on MRI studies  
 
 

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
14.2 
TABLES 
 
Table 7.1 
 
 
 
1CBC with manual differential and platelet count. 
2Includes serum sodium, potassium, chloride, CO2, BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT. 
3Estimated creatinine clearance is calculated using the Cockcroft-Gault formula and actual body weight. 
4Infectious disease titers include: CMV, Hepatitis panel (HepA Ab, HepB SAb, HepB SAg, HepB Core Ab, HepC Ab), herpes simplex virus, syphilis, HIV and HTLV 
I/II antibody, and varicella zoster. 
5May be performed within 12 weeks of enrollment. 
6Pregnancy test must be performed < 14 days from enrollment.  Pregnancy test is required for females of child-bearing potential and may be performed per 
institutional practices.

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
Table 7.2 
 
 
 
1Post transplant evaluation will occur until eligibility criteria for initiation of MED-551 are met.  Subsequent evaluation will take place according to MEDI-551 
evaluation table. 
2CBC with manual differential and platelet count to be performed weekly from Day 0 until engraftment.  CBCs will be performed per institutional guidelines from the 
time of engraftment through randomization.  
3Includes serum sodium, potassium, chloride, CO2, BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT.on weeks 8 and 16. 
4If history of hepatitis B or C.   
5Required once prior to initiation of MEDI-551 maintenance. 
6Required once prior to initiation of MEDI-551 maintenance for females of child-bearing potential and may be performed per institutional practices. 
1
2
3
4
5
6
7
8
10
12
16
24
Physical exam (focused)
X
X
X
X
X
X
X
X
X
X
Assessment of GVHD
X
X
X
X
X
X
X
X
X
X
X
ECOG performance status
X
X
X
X
X
X
X
X
X
X
X
Evaluate eligibility to begin MEDI-551 maintenance
X
X
X
X
Hematology 2
X
X
X
X
X
X
X
X
X
X
X
X
Blood chemistries 3
X
X
X
X
X
X
X
X
X
X
X
X
Viral hepatitis tests 4
Thyroid stimulating hormone 5
X
X
X
Pregnancy test 6
X
X
X
Disease evaluation
Quantitative serum immunoglobulins
X
X
X
SPEP and immunofixation
X
X
X
24 Hour Urine for UPEP, protein excretion and immunofixation
X
X
X
Serum free light chain ratio
X
X
X
Skeletal bone survey or CT scan
X
X
X
Whole blood for chimerism
X
X
X
Bone marrow aspirate and biopsy for chimerism and MRD analysis
X
X
Blood sample for MM CSCs and B cells
X
X
X
X
X
Study Assessments/Testing1
Weeks Post Transplant (prior to starting maintenance only)

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
Table 7.3a 
 
 
 
1For C1D1 assessments and testing are not required if carried out in the past 7 days. 
2Temperature, blood pressure, pulse rate, respiratory rate, pulse ox pre-dose, every 30 min during infusion, end of infusion, and 30 and 60 minutes post end of 
infusion. 
3CBC with manual differential and platelet count to be performed weekly for the first cycle then monthly. 
4Includes serum sodium, potassium, chloride, CO2, BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT. 
5Required at EOT; otherwise perform when indicated clinically. 
6Every 6 months during treatment or when clinically indicated. 
7Pre-dose only. 
 
 
8
9
10
11
12
13
14
15
16
20
24
26
28
32
36
40
44
48
52
56
C1
D1
C1
D8
C1
D15
C1
D22
C2
D1
C2
D8
C2 
D15
C2 
D22
C3
D1
C4
D1
C5
D1
C5
D15
C6
D1
C7
D1
C8
D1
C9
D1
C10
D1
C11
D1
C12
D1
EOT
Physical exam (focused)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Weight
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Vitals2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Assessment of GVHD
X
X
X
X
X
X
X
X
x
Physical exam (focused)
X
X
X
X
X
X
X
X
X
X
X
ECOG performance status
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Hematology 3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Blood chemistries 4
X
X
X
X
X
X
X
X
Thyroid stimulating hormone
X
X
X
X
X
Disease evaluation
Quantitative serum immunoglobulins
X
X
X
X
X
X
X
SPEP and immunofixation
X
X
X
X
X
X
X
24 Hour Urine for UPEP, protein excretion and immunofixation
X
X
X
X
X
X
X
Serum free light chain ratio
X
X
X
X
X
X
X
Skeletal bone survey or CT scan 5
X
X
X
Whole blood for chimerism 6
X
X
X
Bone marrow aspirate and biopsy for chimerism and MRD analysis
X
X
X
Blood sample for MM CSCs and B cells
X
X
X
X
X
X
X
Serum for MEDI-551 PK 7
X
X
X
X
X
X
X
X
X
Serum for MEDI-551 ADA
X
X
X
X
Study Assessments/Testing1
MEDI-551 Cycle (C) and Day (D)
Weeks Post Transplant

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
Table 7.3b 
 
 
 
1For C1D1 assessments and testing are not required if carried out in the past 7 days. 
2Temperature, blood pressure, pulse rate, respiratory rate, pulse ox pre-dose, every 30 min during infusion, end of infusion, and 30 and 60 minutes post end of 
infusion. 
3CBC with manual differential and platelet count to be performed weekly for the first cycle then monthly. 
4Includes serum sodium, potassium, chloride, CO2, BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT. 
5Required at EOT; otherwise perform when indicated clinically. 
6Every 6 months during treatment or when clinically indicated. 
7Pre-dose only. 
 
 
 
 
16
17
18
19
20
21
22
23
24
28
32
34
36
40
44
48
52
56
60
64
C1
D1
C1
D8
C1
D15
C1
D22
C2
D1
C2
D8
C2 
D15
C2 
D22
C3
D1
C4
D1
C5
D1
C5
D15
C6
D1
C7
D1
C8
D1
C9
D1
C10
D1
C11
D1
C12
D1
EOT
Physical exam (focused)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Weight
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Vitals2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Assessment of GVHD
X
X
X
X
X
X
X
X
x
Physical exam (focused)
X
X
X
X
X
X
X
X
X
X
X
ECOG performance status
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Hematology 3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Blood chemistries 4
X
X
X
X
X
X
X
X
Thyroid stimulating hormone
X
X
X
X
X
Disease evaluation
Quantitative serum immunoglobulins
X
X
X
X
X
X
X
SPEP and immunofixation
X
X
X
X
X
X
X
24 Hour Urine for UPEP, protein excretion and immunofixation
X
X
X
X
X
X
X
Serum free light chain ratio
X
X
X
X
X
X
X
Skeletal bone survey or CT scan 5
X
X
X
Whole blood for chimerism 6
X
X
X
Bone marrow aspirate and biopsy for chimerism and MRD analysis
X
X
X
Blood sample for MM CSCs and B cells
X
X
X
X
X
X
X
Serum for MEDI-551 PK 7
X
X
X
X
X
X
X
X
X
Serum for MEDI-551 ADA
X
X
X
X
Study Assessments/Testing1
Weeks Post Transplant
MEDI-551 Cycle (C) and Day (D)

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
Table 7.3c 
 
 
 
1For C1D1 assessments and testing are not required if carried out in the past 7 days. 
2Temperature, blood pressure, pulse rate, respiratory rate, pulse ox pre-dose, every 30 min during infusion, end of infusion, and 30 and 60 minutes post end of 
infusion. 
3CBC with manual differential and platelet count to be performed weekly for the first cycle then monthly. 
4Includes serum sodium, potassium, chloride, CO2, BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT. 
5Required at EOT; otherwise perform when indicated clinically. 
6Every 6 months during treatment or when clinically indicated. 
7Pre-dose only. 
 
 
24
25
26
27
28
29
30
31
32
36
40
42
44
48
52
56
60
64
68
72
C1
D1
C1
D8
C1
D15
C1
D22
C2
D1
C2
D8
C2 
D15
C2 
D22
C3
D1
C4
D1
C5
D1
C5
D15
C6
D1
C7
D1
C8
D1
C9
D1
C10
D1
C11
D1
C12
D1
EOT
Physical exam (focused)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Weight
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Vitals2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Assessment of GVHD
X
X
X
X
X
X
X
X
x
Physical exam (focused)
X
X
X
X
X
X
X
X
X
X
X
ECOG performance status
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Hematology 3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Blood chemistries 4
X
X
X
X
X
X
X
X
Thyroid stimulating hormone
X
X
X
X
X
Disease evaluation
Quantitative serum immunoglobulins
X
X
X
X
X
X
X
SPEP and immunofixation
X
X
X
X
X
X
X
24 Hour Urine for UPEP, protein excretion and immunofixation
X
X
X
X
X
X
X
Serum free light chain ratio
X
X
X
X
X
X
X
Skeletal bone survey or CT scan 5
X
X
X
Whole blood for chimerism 6
X
X
X
Bone marrow aspirate and biopsy for chimerism and MRD analysis
X
X
X
Blood sample for MM CSCs and B cells
X
X
X
X
X
X
X
Serum for MEDI-551 PK 7
X
X
X
X
X
X
X
X
X
Serum for MEDI-551 ADA
X
X
X
X
Study Assessments/Testing1
MEDI-551 Cycle (C) and Day (D)
Weeks Post Transplant

Protocol Number: J1747 
Protocol Version Date: November 10, 2017 
 
 
Table 7.4 
 
 
 
1Follow up evaluations to be carried out every 6 months after two years. 
2CBC with manual differential and platelet count to be performed weekly for the first cycle then monthly. 
3Includes serum sodium, potassium, chloride, CO2, BUN, creatinine, calcium, total bilirubin, alkaline phosphatase, AST, ALT.