This is an open-label, FIH study designed to evaluate the maximum tolerated dose, recommended Phase 2 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 RLY-2608 as a single agent for patients with unresectable or metastatic solid tumors. It will also evaluate RLY-2608 in combination RLY-2608 + fulvestrant and in triple combination RLY-2608 + fulvestrant + CDK4/6 inhibitor (palbociclib or ribociclib) or CDK4 inhibitor (PF-07220060) for patients with HR+ HER2- locally advanced or metastatic breast cancer or endometrial cancer (palbociclib or ribociclib Part 1). The RLY-2608 single agent arm, RLY-2608 + fulvestrant combination arm, and triple combination arms will have 2 parts: a dose escalation (Part 1) and a dose expansion (Part 2).
PIK3CA Mutation, Solid Tumor, Adult, HER2-negative Breast Cancer, Breast Cancer, Metastatic Breast Cancer, Advanced Breast Cancer, Unresectable Solid Tumor, Endometrial Cancer
This is an open-label, FIH study designed to evaluate the maximum tolerated dose, recommended Phase 2 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 RLY-2608 as a single agent for patients with unresectable or metastatic solid tumors. It will also evaluate RLY-2608 in combination RLY-2608 + fulvestrant and in triple combination RLY-2608 + fulvestrant + CDK4/6 inhibitor (palbociclib or ribociclib) or CDK4 inhibitor (PF-07220060) for patients with HR+ HER2- locally advanced or metastatic breast cancer or endometrial cancer (palbociclib or ribociclib Part 1). The RLY-2608 single agent arm, RLY-2608 + fulvestrant combination arm, and triple combination arms will have 2 parts: a dose escalation (Part 1) and a dose expansion (Part 2).
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
-
The University of Arizona Cancer Center, Tucson, Arizona, United States, 85724
University of California-San Diego, San Diego, California, United States, 90293
HealthONE, Denver, Colorado, United States, 80218
Yale University, New Haven, Connecticut, United States, 06510
Florida Cancer Specialists, Orlando, Florida, United States, 32827
Boca Raton Clinical Research (BRCR) Global, Plantation, Florida, United States, 33322
University of Chicago Medical Center, Chicago, Illinois, United States, 60637
Community Health Network, Indianapolis, Indiana, United States, 46250
Massachusetts General Hospital, Boston, Massachusetts, United States, 02114
Dana-Farber Cancer Institute, Boston, Massachusetts, United States, 02215
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
For general information about clinical research, read Learn About Studies.
18 Years to
ALL
No
Relay Therapeutics, Inc.,
2026-08-31