Rucaparib + Enzalutamide for Prostate Cancer

(CASPAR Trial)

Recruiting at 438 trial locations

Overseen By Arpit Rao, MD

Age: 18+

Sex: Male

Travel: May Be Covered

Time Reimbursement: Varies

Trial Phase: Phase 3

Waitlist Available

Sponsor: Alliance for Clinical Trials in Oncology

No Placebo Group

Pivotal Trial (Near Approval)

Prior Safety Data

Breakthrough Therapy

Trial Summary

What is the purpose of this trial?

This randomized, placebo-controlled phase III trial is evaluating the benefit of rucaparib and enzalutamide combination therapy versus enzalutamide alone for the treatment of men with prostate cancer that has spread to other places in the body (metastatic) and has become resistant to testosterone-deprivation therapy (castration-resistant). Enzalutamide helps fight prostate cancer by blocking the use of testosterone by the tumor cells for growth. Poly adenosine diphosphate (ADP)-ribose polymerase (PARP) inhibitors, such as rucaparib, fight prostate cancer by prevent tumor cells from repairing their DNA. Giving enzalutamide and rucaparib may make patients live longer or prevent their cancer from growing or spreading for a longer time, or both. It may also help doctors learn if a mutation in any of the homologous recombination DNA repair genes is helpful to decide which treatment is best for the patient.

Research Team

Arpit Rao, MD

Principal Investigator

Baylor College of Medicine

Eligibility Criteria

Men with metastatic prostate cancer resistant to testosterone-deprivation therapy are eligible. They must have documented prostate adenocarcinoma, radiographic progression, and no central nervous system metastases that aren't stable or treated. Participants need to be off certain drugs affecting liver enzymes and recovered from major surgeries or treatments. No prior treatment for metastatic castration-resistant prostate cancer is allowed.

Inclusion Criteria

I have available tissue samples from my cancer for testing.

My cancer has spread and can be measured or not.

Total bilirubin =< 1.5 x upper limit of normal (ULN)

Treatment Details

Interventions

• Enzalutamide (Antiandrogen)
• Rucaparib camsylate (PARP Inhibitor)

Trial Overview The trial tests if adding Rucaparib (a PARP inhibitor) to Enzalutamide improves outcomes in men whose prostate cancer has spread and resists hormone therapy. It's a phase III study where patients are randomly assigned either the combination of both drugs or Enzalutamide alone, plus placebos as needed.

Participant Groups

Group I: Arm I (enzalutamide, rucaparib) Experimental Treatment 7 Interventions

Patients receive enzalutamide PO QD and rucaparib PO BID. Patients who did not undergo bilateral orchiectomy also receive ADT consisting of leuprolide acetate IM, goserelin acetate SC every 12 weeks or degarelix SC. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

Group II: Arm II (enzalutamide, placebo) Active Control 6 Interventions

Patients receive enzalutamide PO QD and placebo PO BID. Patients who did not undergo bilateral orchiectomy also receive ADT consisting of leuprolide acetate IM, goserelin acetate SC every 12 weeks or degarelix SC. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

Enzalutamide is already approved in Canada, Japan for the following indications:

Approved in Canada as Xtandi for:

• Metastatic castration-resistant prostate cancer (mCRPC)
• Non-metastatic castration-resistant prostate cancer (nmCRPC)

Approved in Japan as Xtandi for:

• Metastatic castration-resistant prostate cancer (mCRPC)
• Non-metastatic castration-resistant prostate cancer (nmCRPC)

Who Is Running the Clinical Trial?

Alliance for Clinical Trials in Oncology

Lead Sponsor

Trials

521

Recruited

224,000+

National Cancer Institute (NCI)

Collaborator

Trials

14,080

Recruited

41,180,000+