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A Phase 2 Study to Evaluate Safety and Efficacy of Abiraterone Acetate in Male Participants With Prostate Cancer

Information source: Janssen Research & Development, LLC
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Prostate Cancer

Intervention: Abiraterone (Drug); Leuprolide (Drug); Prednisone (Drug)

Phase: Phase 2

Status: Completed

Sponsored by: Janssen Research & Development, LLC

Official(s) and/or principal investigator(s):
Janssen Research & Development, LLC Clinical Trial, Study Director, Affiliation: Janssen Research & Development, LLC


The purpose of this study is to evaluate safety and efficacy of abiraterone acetate plus leuprolide acetate and prednisone, versus leuprolide acetate alone in male participants with prostate cancer (a disease in which cells in the prostate gland become abnormal and start to grow uncontrollably, forming tumors) who are suitable candidates for prostatectomy (surgery to remove all or part of the prostate gland).

Clinical Details

Official title: A Phase 2 Open-Label, Randomized, Multi-center Study of Neoadjuvant Abiraterone Acetate (CB7630) Plus Leuprolide Acetate and Prednisone Versus Leuprolide Acetate Alone in Men With Localized High Risk Prostate Cancer

Study design: Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Primary outcome:

Testosterone Concentration in Prostate Tissue

Dihydrotestosterone (DHT) Concentration in Prostate Tissue

Secondary outcome:

Testosterone and Dihydrotestosterone (DHT) Concentration in Prostate Tissue

Androstenedione and Dehydroepiandrosterone (DHEA) Concentrations in Prostate Tissue

Serum Levels of Androgens

Percentage of Participants With Prostate-specific Antigen (PSA) Response

Percentage of Participants With Pathologic Complete Response (CR)

Number of Participants With Tumor Expression of Androgen Receptor (AR) Regulated Genes at Week 24

Correlation Between Molecular and Protein Expression With Intracellular Androgen Levels and Pathologic Response to Study Treatment

Detailed description: This is an open-label (all people know the identity of the intervention), randomized (the study drug is assigned by chance), and multi-center (conducted in more than one center) study of abiraterone in male participants with prostate cancer. The duration of study will be approximately 24-32 weeks per participant. The study consists of 4 parts: Screening (that is, 30 days before study commences on Day 1); Treatment (abiraterone acetate 1000 milligram per day or leuprolide acetate as 22. 5 milligram intramuscular injection [injection of a substance into a muscle] or prednisone 5 mg once daily); Prostatectomy (Week 24); and Follow-up ( 4-8 weeks after prostatectomy). Participants will receive either abiraterone, leuprolide and prednisone for 24 weeks (that is, Group 1) or leuprolide once every 12 weeks up to Week 24 then abiraterone and prednisone from Week 13 to 24 (that is, Group 2). All the eligible participants will be randomly assigned to 1 of the 2 treatment groups. Efficacy will be evaluated primarily through the concentrations of testosterone and dihydrotestosterone from prostate tissues at Week 12. Participants' safety will be monitored throughout the study.


Minimum age: 18 Years. Maximum age: N/A. Gender(s): Male.


Inclusion Criteria:

- Histologically or cytologically confirmed adenocarcinoma of the prostate

- At least three core biopsies positive for prostate cancer (a minimum of 6 core

biopsies must be obtained at baseline). A prostate biopsy within 6 months from Screening is allowed for entry requirements

- At least one of the following features: prostate specific antigen (PSA) greater than

(>) 10 nanogram per milliliter (ng/ml); PSA velocity >2 ng/ml per /year (defined as a rise in PSA of >2 ng/ml in the preceding 12 month period); Gleason score greater than or equal to (>=) 7 (4+3); Gleason score 6 if either PSA >=10 ng/ml or PSA velocity >=2 ng/ml/year

- Serum testosterone >200 nanogram/deciliter

- Participant and urologist must agree that participant is suitable for prostatectomy

Exclusion Criteria:

- Serious or uncontrolled co-existent, non-malignant disease, including active and

uncontrolled infection

- Abnormal liver function consisting of any of the following: serum bilirubin >= 1. 5 *

upper limit of normal (ULN); aspartate aminotransferase or alanine aminotransferase >=2. 5 * ULN

- Uncontrolled hypertension within the Screening period (systolic blood pressure

>= 160 millimeter of mercury [mmHg] or diastolic BP >= 95 mmHg)

- Requirement for corticosteroids greater than the equivalent of 5 milligram of

prednisone daily

- Participants with active or symptomatic viral hepatitis or chronic liver disease or

clinically significant heart disease or as evidenced by myocardial infarction, or arterial thrombotic events in the past 6 months, severe or unstable angina, or New York Heart Association (NYHA) Class II-IV heart disease or cardiac ejection fraction measurement of < 50 percent at Baseline or history of gastrointestinal disorders (medical disorders or extensive surgery) which may interfere with the absorption of the study drug or history of pituitary or adrenal dysfunction

Locations and Contacts

Boston, Massachusetts, United States

Houston, Texas, United States

Seattle, Washington, United States

Wenatchee, Washington, United States

Additional Information

Starting date: November 2009
Last updated: March 6, 2013

Page last updated: August 23, 2015

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