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for males ages 18 years and up (full criteria)
at San Francisco, California and other locations
study started
estimated completion:



The purpose of this study is to assess the efficacy, safety, and pharmacokinetics of niraparib in men with metastatic castration resistant prostate cancer (mCRPC) and deoxyribonucleic acid (DNA) repair anomalies.

Official Title

A Phase 2 Efficacy and Safety Study of Niraparib in Men With Metastatic Castration-Resistant Prostate Cancer and DNA-Repair Anomalies


This is a multicenter and open-label (participants and researchers are aware of the treatment that participants are receiving) study that consists of 4 phases; a Prescreening Phase for biomarker evaluation only, a Screening Phase, a Treatment Phase (Cycle 1 Day 1 and will continue until the study drug is discontinued), and a Follow-up Phase (every 3 months after end of treatment visit). Participants will be monitored for safety during the study period, and up to 30 days after the last dose of study drug.


Prostatic Neoplasms Prostate cancer CRPC Metastatic castrate-resistant prostate cancer Prostate neoplasm Galahad Niraparib DNA anomalies DNA defect PARP inhibitor PARPi Congenital Abnormalities


You can join if…

Open to males ages 18 years and up

  • Histologically confirmed prostate cancer (mixed histology is acceptable, with the exception of the small cell pure phenotype, which is be excluded)
  • Disease progression while on treatment with at least 1 line of taxane-based chemotherapy for prostate cancer
  • Disease progression while on treatment with at least 1 line of Androgen Receptor (AR)targeted therapy
  • Tumor that is Biomarker-positive for deoxyribonucleic acid (DNA) repair anomalies
  • Progression of metastatic prostate cancer in the setting of castrate levels of testosterone or history of bilateral orchiectomy at study entry

You CAN'T join if...

  • Prior treatment with a poly (adenosine diphosphate [ADP] ribose) polymerase (PARP)inhibitor
  • Prior platinum-based chemotherapy for the treatment of prostate cancer
  • Known history or current diagnosis of myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML)
  • Known symptomatic or impending cord compression
  • Known symptomatic uncontrolled brain or leptomeningeal metastases (Day 1)


  • San Francisco, California, United States
  • Sacramento, California, United States
  • Los Angeles, California, United States


currently not accepting new patients, but might later
Start Date
Completion Date
Janssen Research & Development, LLC
Phase 2
Lead Scientist
Won Kim
Study Type
Last Updated
September 27, 2017
I’m interested in this study!