Relay announces plans for Phase 3 breast cancer trial of drug combination

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Relay Therapeutics Announces Clinical Data for Zovegalisib plus Atirmociclib Triplet Combination Supportive of Further Development in Frontline Metastatic Breast Cancer

April 27, 2026 6:00 AM EDT

Zovegalisib + atirmociclib + AI selected as triplet regimen for frontline development

Compelling efficacy and tolerability data for zovegalisib triplet in median 3L patients

44% ORR in heavily pre-treated, CDK4/6-experienced patients (median third-line); ORR is similar across kinase and non-kinase PIK3CA mutations

Phase 3 frontline trial in endocrine sensitive patients expected to initiate in early 2027, subject to regulatory feedback

Supply agreement in place with Pfizer to supply atirmociclib for the Phase 3 frontline trial

Relay Therapeutics to host a conference call... More