Relay Therapeutics Inc. announced interim clinical data from a subset analysis of the investigational drug zovegalisib (RLY-2608), an allosteric, pan-mutant and isoform-selective inhibitor of PI3Kα, in combination with fulvestrant for patients with PI3Kα-mutated, HR+/HER2- advanced breast cancer previously treated with CDK4/6 inhibitors. The data were presented at the 2025 San Antonio Breast Cancer Symposium (SABCS). Efficacy results showed a median progression-free survival $(PFS)$ of 10.3 months in all patients and 11.4 months in second-line patients, with activity observed across subgroups regardless of prior fulvestrant or other SERD exposure, or ESR1 mutation status. The ongoing Phase 3 ReDiscover-2 trial continues to enroll CDK4/6-experienced breast cancer patients.
Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Relay Therapeutics Inc. published the original content used to generate this news brief via GlobeNewswire (Ref. ID: GNW9600940-en) on December 12, 2025, and is solely responsible for the information contained therein.
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