Overview

First-in-Human Study of Mutant-selective PI3Kα Inhibitor, RLY-2608, as a Single Agent in Advanced Solid Tumor Patients and in Combination With Fulvestrant in Patients With Advanced Breast Cancer

Status:
Recruiting

Trial end date:
2025-08-31

Target enrollment:

Participant gender:

Summary

This is an open-label, FIH study designed to evaluate the maximum tolerated dose, safety, tolerability, PK, pharmacodynamics, and preliminary antineoplastic activity of RLY-2608, in advanced solid tumor patients with a Phosphatidylinositol-4,5-bisphosphate-3 kinase, catalytic subunit alpha (PIK3CA) mutation in blood and/or tumor per local assessment. The study will evaluate both RLY-2608 as a single agent for patients with unresectable or metastatic solid tumors and RLY-2608 + fulvestrant combination arm for patients with HR+ HER2- locally advanced or metastatic breast cancer. This study consists of 2 parts, a dose escalation (Part 1) and a dose expansion (Part 2).

Phase:

Phase 1

Details

Lead Sponsor:

Relay Therapeutics, Inc.

Treatments:

Fulvestrant