An observational study profiling biospecimens from 10,000 metastatic prostate cancer (mPCa) patients to screen for molecular alterations.

Abstract

TPS402 Background: Despite recent success in development and use of targeted agents in patients with solid tumors, there is a paucity of such therapies approved for use in prostate cancer. This observational study provides next-generation sequencing (NGS) to men with mPCa to evaluate the proportion of patients available for targeted therapy clinical trials in mPCa and to assess the feasibility of using a large-scale NGS screening program to match patients for eligibility criteria in clinical trials. Methods: Using a virtual clinical trial model to maximize patient access and enrollment, this study is providing next-generation sequencing (NGS) to 10,000 men with mPCa. Patients with histologically-documented mPCa and surplus formalin-fixed paraffin-embedded tumor tissue are eligible for enrollment. Leftover archival tissue is submitted for NGS to Strata Oncology, a clinical laboratory improvement amendments (CLIA)-certified lab. The StrataNGS assay sequences DNA and RNA, and simultaneously detects a range of actionable genomic alterations including gene mutations, small insertions and deletions, copy number changes, and gene fusions in 87 cancer-related genes. Microsatellite instability status is determined via the number of length variant alleles observed in NGS sequencing data at several microsatellite loci. Test reports presented to the clinician include all positive and negative variants detected, and information about potential matching therapeutic protocols. Clinical trial information: NCT03061305.