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Clinical Trial ● Currently Recruiting Phase II NCT06789913

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

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 — Recruiting • Phase…

📅 05 May 2026 ⏱ 1 min read
Currently Recruiting
This trial is actively seeking participants in the UK. Discuss eligibility with your patient before referring.
Status
Currently Recruiting
Phase
Phase II
NCT ID
NCT06789913
Sponsor
Relay Therapeutics, Inc.
Start
2025-06-13
ClinicaliQ Trial Snapshot
  • 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 — Recruiting • Phase II • Cardiology / Cardiovascular • NCT06789913.
  • What is being tested: RLY-2608, a mutant-selective PI3Kα inhibitor, is being evaluated for safety and efficacy in treating PIK3CA-related overgrowth spectrum (PROS) and PIK3CA-driven malformations across a Phase 2 randomized study design.
  • Patient eligibility overview: The trial enrolls both adults and children with confirmed PIK3CA mutations causing overgrowth disorders and associated malformations, representing a genetically-defined patient population with a rare developmental condition.
Use This Page For
  • Quick orientation before opening the registry record.
  • Checking recruitment status, phase and sponsor at a glance.
  • Connecting this trial to nearby guidelines, Drug Science and education.
What This Trial Is Studying

This is a 3-part Phase 2 randomized study evaluating the safety and efficacy of the mutant-selective PI3Kα inhibitor, 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.

Eligibility Snapshot
  • Key Inclusion Criteria: * The participant must have a clinical diagnosis of PROS or a malformation within the ISSVA classification. * One or more documented activating PIK3CA mutation(s) that are targeted by selective PI3Kα inhibitors in lesional tissue and/or cell-free DNA from the lesion or blood. Some participants may be eligible without a documented PIK3CA mutation as long as no other genetic driver has been documented. * Lansky (

Use the source registry for the full inclusion and exclusion criteria before discussing referral or enrolment.

Full Trial Details
View this trial on the source registry
Eligibility criteria, protocol, and results when available
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