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Role of PARP Inhibitors Developing in mCRPC

Danielle Bucco
Published: Tuesday, Dec 26, 2017

Prostate Cancer
PARP inhibitors are beginning to show promise for patients with metastatic castration-resistant prostate cancer (mCRPC).

In January 2016, the FDA granted olaparib (Lynparza) a breakthrough therapy designation as a treatment for patients with BRCA1/2 or ATM-mutated mCRPC who have received prior taxane-based chemotherapy and at least either enzalutamide (Xtandi) or abiraterone acetate (Zytiga). The decision is based on findings from the phase II TOPARP-A trial, which demonstrated that olaparib had a nearly 90% overall response rate in a subgroup of patients who had DNA-repair defects.

Additionally, there is an ongoing phase III trial (NCT02987543) investigating olaparib versus enzalutamide or abiraterone acetate in patients with mCRPC who have failed prior treatment with a new hormonal agent and have homologous recombination repair gene mutations.

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