Clinical trial NCT02023463: Enzalutamide, Radiation Therapy and Hormone Therapy in Treating Patients With Intermediate or High-Risk Prostate Cancer
Official title: Phase Ib Trial of Enzalutamide in Combination With Radiation Therapy and LHRH Agonist Therapy in the Management of Intermediate and High-Risk Prostate Cancer
Study type: INTERVENTIONAL
Overall status: ACTIVE_NOT_RECRUITING
Phase: PHASE1
Conditions: Adenocarcinoma of the Prostate
Recurrent Prostate Cancer
Stage IIB Prostate Cancer
Stage III Prostate Cancer
Stage IV Prostate Cancer
Lead sponsor: Thomas Jefferson University
Sponsor class: OTHER
Collaborators: name: Astellas Pharma Inc
name: Medivation, Inc.
First posted: 2013-12-30
Enrollment: 25
Sex: MALE
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: This phase I trial studies the side effects and best way to give enzalutamide, radiation therapy, and hormone therapy in treating patients with intermediate or high-risk prostate cancer. Androgens can cause the growth of prostate cancer cells. Antihormone therapy, such as enzalutamide, may lessen the amount of androgens made by the body. Radiation therapy uses high energy x rays to kill tumor cells. Giving enzalutamide, radiation therapy, and hormone therapy may be an effective treatment for prostate cancer.

Detailed description: PRIMARY OBJECTIVE:

1) To assess the safety of the combination of neoadjuvant and concurrent enzalutamide with an luteinizing-hormone-releasing hormone (LHRH) agonist and radiation therapy.

SECONDARY OBJECTIVES:

1. To determine the efficacy of the combination of enzalutamide with an LHRH agonist and radiation therapy using prostate specific antigen (PSA) kinetics.
2. To determine the efficacy of the combination of enzalutamide with an LHRH agonist and radiation therapy using PSA nadir.
3. To describe patient-reported outcomes including: Expanded Prostate Cancer Index Composite (EPIC), American Urological Association (AUA) Symptom Index, PROstate magnetic resonance (MR) Imaging Study (PROMIS) Fatigue Scale.

OUTLINE:

Patients receive enzalutamide orally (PO) once daily (QD) for 6 months. Beginning 2 weeks after start of enzalutamide, patients receive LHRH agonist therapy with goserelin acetate subcutaneously (SC) or leuprolide acetate intramuscularly (IM) or SC for 6 months (intermediate risk patients) or 24 months (high risk patients) post-radiation therapy. Beginning 8 weeks after the start of LHRH agonist therapy, patients undergo either intensity modulated radiation therapy (IMRT) or volumetric arc therapy (VMAT) daily five days a week for 8 weeks.

After completion of study treatment, patients are followed up every 3 months for 2 years, every 6 months for 2 years, and then annually thereafter.

Eligibility criteria: Inclusion Criteria:

1. Prostate adenocarcinoma without distant metastatic disease with either Gleason score ≥ 7, PSA ≥ 10 ng/ml, or T2b or greater disease
2. Age \> 18
3. Performance Status: ECOG 0-1
4. Hematologic (minimal values):

   * Absolute neutrophil count \> 1,500/mm3
   * Hemoglobin \> 8.0 g/dl
   * Platelet count \> 100,000/mm3
5. Hepatic function

   * Total bilirubin \< Upper limit of normal (ULN)(except for Gilbert's disease)
   * AST (SGOT) \< 1.5 x ULN
   * ALT (SGPT) \< 1.5 x ULN
6. Creatinine \< 1.5 x ULN
7. Men of childbearing potential must be willing to consent to using effective contraception while on treatment and for at least 3 months thereafter.

Exclusion Criteria:

1. Patients with a history of seizure, underlying brain injury with loss of consciousness, transient ischemic attack within the past 12 months, cerebral vascular accident, brain metastases, brain arteriovenous malformation or the use of concomitant medications that may lower the seizure threshold
2. History of urological surgery or procedures predisposing to GU complications after radiation (will be determined by radiation oncologist)
3. History of diverticulitis, rectal bleeding or other lower GI diseases predisposing to GI complications after radiation (will be determined by radiation oncologist)
4. History of prior chemotherapy or pelvic irradiation,
5. History of prior invasive malignant cancer(s) within the last 5 years except adequately treated or controlled basal cell or squamous cell carcinoma of the skin.
6. Documented distant metastatic disease. NOTE: pelvic lymphadenopathy is NOT excluded.
7. Prior radical prostatectomy or cryosurgery for prostate cancer or bilateral orchiectomy.
8. No experimental medications within 30 days of study entry
9. Patients currently taking the following medications:

   * CYP2C8 inhibitors (e.g. Gemfibrozil)
   * CYP2C8 inducers (e.g. rifampin)
   * CYP3A4 inhibitors (itraconazole)
   * CYP3A4 inducers (e.g., carbamazepine, phenobarbital, phenytoin, rifabutin, rifampin, rifapentine)

Primary outcomes:
measure: Acute toxicities, monitored using the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0 criteria
timeFrame: Up to 1 month post completion of enzalutamide
Secondary outcomes:
measure: Change in PSA levels
timeFrame: Baseline up to 6 months
measure: Quality of life (QoL), measured using the EPIC, AUA symptom index, and the PROMIS Fatigue Scale
timeFrame: Baseline up to 1 year
Other outcomes:
Locations:
city: Philadelphia
country: United States
facility: Thomas Jefferson University
state: Pennsylvania
Study officials:
affiliation: Thomas Jefferson University
name: Robert Den, MD
role: PRINCIPAL_INVESTIGATOR
References: