A Safety Study of Abiraterone Acetate Administered in Combination With Docetaxel in Patients With Metastatic Castration-Resistant Prostate Cancer (mCRPC)

This study is ongoing, but not recruiting participants.
Sponsor:
Information provided by (Responsible Party):
Cougar Biotechnology, Inc.
ClinicalTrials.gov Identifier:
NCT01400555
First received: July 21, 2011
Last updated: May 12, 2014
Last verified: May 2014

July 21, 2011
May 12, 2014
September 2011
November 2014   (final data collection date for primary outcome measure)
Proportion of patients with a dose-limiting toxicity [ Time Frame: Up through Week 6 ] [ Designated as safety issue: Yes ]
Proportion of patients with a dose-limiting toxicity [ Time Frame: Up through Week 6 ] [ Designated as safety issue: No ]
Complete list of historical versions of study NCT01400555 on ClinicalTrials.gov Archive Site
  • Proportion of patients with prostate-specific antigen (PSA) response [ Time Frame: Up to Month 36 ] [ Designated as safety issue: No ]
  • Time to PSA progression [ Time Frame: Up to Month 36 ] [ Designated as safety issue: No ]
  • Objective response rate [ Time Frame: Up to Month 36 ] [ Designated as safety issue: No ]
  • Radiographic progression-free survival [ Time Frame: Up to Month 36 ] [ Designated as safety issue: No ]
  • Survival [ Time Frame: Up to Month 36 ] [ Designated as safety issue: No ]
  • Proportion of patients with prostate-specific antigen (PSA) response [ Time Frame: Up to Week 36 ] [ Designated as safety issue: No ]
  • Time to PSA progression [ Time Frame: Up to Week 36 ] [ Designated as safety issue: No ]
  • Objective response rate [ Time Frame: Up to Week 36 ] [ Designated as safety issue: No ]
  • Radiographic progression-free survival [ Time Frame: Up to Week 36 ] [ Designated as safety issue: No ]
  • Survival [ Time Frame: Up to Week 36 ] [ Designated as safety issue: No ]
Not Provided
Not Provided
 
A Safety Study of Abiraterone Acetate Administered in Combination With Docetaxel in Patients With Metastatic Castration-Resistant Prostate Cancer (mCRPC)
A Phase 1b Safety Study of Abiraterone Acetate (JNJ-212082) and Docetaxel in Subjects With Metastatic Castration-Resistant Prostate Cancer (mCRPC)

The purpose of this study is to evaluate the maximum safe dose of abiraterone acetate administered in combination with docetaxel plus prednisone in patients with metastatic castration-resistant prostate cancer (mCRPC).

This is an open-label (patients and their doctors will know the identity of study drug administered), uncontrolled (patients are not assigned to treatment by chance), multicenter safety study of escalating dose levels of abiraterone acetate administered in combination with docetaxel plus prednisone in patients with metastatic castration-resistant prostate cancer (mCRPC). This study is conducted in 2 parts. Part I consists of Screening, Treatment, assessment of dose-limiting toxicity (DLT), and determination of the maximum tolerated dose (MTD). Participants are enrolled in sequential 6-subject cohorts (groups) and administered combination therapy (abiraterone acetate and docetaxel plus prednisone) according to a dose-escalation schedule. The abiraterone acetate dose in this study will escalate from 500 mg to 1000 mg daily until the MTD is determined. The MTD is the highest combination dose among the dose combinations investigated in this study at which no more than 2 (33%) of the patients in a cohort experience a DLT. A DLT is defined by an adverse event occurring from Day 1 Week 2 (first dose of abiraterone acetate) to the day before the Day 1 Week 7 docetaxel infusion (3 weeks after the second docetaxel infusion); non-hematological toxicity >=Grade 3; Grade 4 neutropenia lasting more than 5 days, neutropenia complicated by fever, or systemic infection; thrombocytopenia <25,000/mcL, or any thrombocytopenia requiring platelet transfusion; and, any subjectively intolerable toxicity. Part II of the study consists of Continuing Treatment, when patients remain at the allocated dose level, escalate to the combination MTD, or discontinuation of docetaxel (if toxicity or intolerability develops) and continue abiraterone acetate (up to 1000 mg/day) plus prednisone, until disease progression; End of Treatment, when posttreatment efficacy and safety will be documented; and Follow-Up, when survival status and new antitumor therapy are monitored. Blood samples for pharmacokinetic and efficacy measurements will be collected at selected times during the study. Safety will be monitored. The total duration of study participation may be up to 36 months. Oral abiraterone acetate will be administered as a single daily dose (500, 750, or 1000 mg). Docetaxel will be administered once every 3 weeks as an intravenous (IV) infusion (60 or 75 mg/m2) over 1 hour. Study participants will premedicate with oral dexamethasone 8 mg 1, 3, and 12 hours before the start of each docetaxel IV infusion. Oral prednisone 5 mg will be administered twice daily.

Interventional
Phase 1
Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
  • Prostate Neoplasms
  • Prostate Cancer
  • Drug: Cohort 4
    Docetaxel 75 mg/m2 administered once every 3 weeks + abiraterone acetate 750 mg/day + prednisone 10 mg/day
  • Drug: Cohort 3
    Docetaxel 75 mg/m2 administered once every 3 weeks + abiraterone acetate 1000 mg/day + prednisone 10 mg/day
  • Drug: Cohort 2
    Docetaxel 75 mg/m2 administered once every 3 weeks + abiraterone acetate 500 mg/day + prednisone 10 mg/day
  • Drug: Cohort 1
    Docetaxel 60 mg/m2 administered once every 3 weeks + abiraterone acetate 500 mg/day + prednisone 10 mg/day
  • Experimental: 001
    Cohort 1 Docetaxel 60 mg/m2 administered once every 3 weeks + abiraterone acetate 500 mg/day + prednisone 10 mg/day
    Intervention: Drug: Cohort 1
  • Experimental: 002
    Cohort 2 Docetaxel 75 mg/m2 administered once every 3 weeks + abiraterone acetate 500 mg/day + prednisone 10 mg/day
    Intervention: Drug: Cohort 2
  • Experimental: 003
    Cohort 3 Docetaxel 75 mg/m2 administered once every 3 weeks + abiraterone acetate 1000 mg/day + prednisone 10 mg/day
    Intervention: Drug: Cohort 3
  • Experimental: 004
    Cohort 4 Docetaxel 75 mg/m2 administered once every 3 weeks + abiraterone acetate 750 mg/day + prednisone 10 mg/day
    Intervention: Drug: Cohort 4
Huang X, Chau CH, Figg WD. Challenges to improved therapeutics for metastatic castrate resistant prostate cancer: from recent successes and failures. J Hematol Oncol. 2012 Jul 2;5:35. doi: 10.1186/1756-8722-5-35.

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Active, not recruiting
22
July 2015
November 2014   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • Adenocarcinoma of the prostate
  • Metastatic disease documented by bone, computed tomography (CT), or magnetic resonance image (MRI) scan
  • Surgical or medical castration with testosterone less than 50 ng/dL
  • Prostate cancer progression documented by 1 of the following: PSA progression according to Prostate Cancer Working Group 2 (PCWG2) criteria, radiographic progression by modified Response Evaluation Criteria in Solid Tumors (RECIST) or bone scan
  • Absolute neutrophil count >1,500 cells/mm3
  • Platelets >100,000/µl
  • Hemoglobin >=10.0 g/dL
  • Eastern Cooperative Group (ECOG) status score of <=2.

Exclusion Criteria:

  • Elevated liver function tests (LFTs): Serum bilirubin >upper limit of normal (ULN), alanine (ALT) or aspartate (AST) aminotransferase > 1.5 ULN concomitant with alkaline phosphatase > 2.5 ULN
  • Small cell carcinoma of the prostate
  • Pulmonary or brain metastasis, liver metastasis is allowed if LFTs are not elevated
  • Pre-existing neuropathy or severe fluid retention
  • Prior cytotoxic chemotherapy for metastatic prostate cancer
  • Prior therapy with other CYP17 inhibitor(s) or investigational agent(s) targeting the androgen receptor for metastatic prostate cancer
  • Treatment of primary tumor within 4 weeks of Day 1 Week 1 with surgery, radiation, chemotherapy or immunotherapy
  • Use of investigational drug within 4 weeks of Day 1 Week 1 or current enrollment in an investigational drug or device study
  • Prior ketoconazole for prostate cancer
  • Recent history of ischemic heart disease, electrocardiogram (ECG) abnormalities, or atrial fibrillation.
Male
18 Years and older
No
Contact information is only displayed when the study is recruiting subjects
United States
 
NCT01400555
CR018712, COU-AA-206
Yes
Cougar Biotechnology, Inc.
Cougar Biotechnology, Inc.
Not Provided
Study Director: Cougar Biotechnology, Inc. Clinical Trial Cougar Biotechnology, Inc.
Cougar Biotechnology, Inc.
May 2014

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP