Metastatic Castrate Resistant Prostate Cancer – Immunotherapy and PARP Inhibitors

Alan Tan, MD, discusses multiple advanced treatment options for prostate cancer, focusing on genomic testing, PARP inhibitors, and emerging immunotherapy strategies. His 26-minute presentation begins with data indicating that 12% of prostate cancer patients carry germline mutations, predominantly in the BRCA family, emphasizing the prognostic significance of BRCA alterations. Genomic testing advancements, particularly in homologous recombination repair (HRR) alterations, reveal actionable pathways in approximately 25-27% of cases. PARP inhibitors are highlighted for their efficacy in BRCA-mutated cancers, with the latest trials—PROpel, TALAPRO-2, and MAGNITUDE—demonstrating survival benefits in combination therapies.

Dr. Tan also addresses immunotherapy, with a compelling clinical example underscoring the transformative impact of pembrolizumab in an ultra-high tumor mutation burden case. He also examines T-cell engagers, which show promise in overcoming downregulated MHC expression, and early-phase trials for bispecific antibodies. Toxicity management in PARP inhibitors is discussed in detail.

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