A Phase 2 Study of Mutant-selective PI3Kα Inhibitor, RLY-2608, in Adults and Children With PIK3CA Related Overgrowth Spectrum and Malformations Driven by PIK3CA Mutation (The ReInspire Study)

This is a 3-part Phase 2 randomized study evaluating the safety and efficacy of the mutant-selective PI3Kα inhibitor, zovegalisib (RLY-2608), in adults and children with PIK3CA Related Overgrowth Spectrum (PROS) and malformations driven by PIK3CA mutation. Part 1 is a dose selection, Part 2 is a basket design with exploratory single-arm cohorts for various subpopulations of participants, and Part 3 is randomized, double-blinded study vs placebo.

NCT Number	NCT06789913
Lead Sponsor	Relay Therapeutics, Inc.
Conditions	PIK3CA-Related Overgrowth Spectrum (PROS), Lymphatic Malformations, Vascular Malformations, PIK3CA Mutation, CLOVES Syndrome, Klippel Trenaunay Syndrome, Megalencephaly-capillary Malformation Polymicrogyria Syndrome (MCAP), Vascular Anomalies
Enrollment	277 participants
Start Date	2025-06-13
Primary Completion	2031-07 (estimated)
Study Completion	2031-10 (estimated)
Updated on ClinicalTrials.gov	2026-08-12