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NCT07584226PHASE1Recruiting

A First-in-human Study of RLY-8161 in Advanced NRAS-Mutant Solid Tumors

Relay Therapeutics, Inc.

Start Date

3/9/2026

Completion Date

12/31/2029

Summary

This is a Phase 1 first-in-human, open-label multicenter study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics, and preliminary antitumor activity of RLY-8161, an NRAS-selective inhibitor, in participants with advanced NRAS-mutant melanoma and other solid tumors.

Detailed Description

This is a Phase 1 first-in-human, open-label multicenter study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics, and preliminary antitumor activity of RLY-8161, an NRAS-selective inhibitor, in participants with advanced NRAS-mutant melanoma and other solid tumors. This study consists of 2 parts: dose escalation (Part 1) and dose expansion (Part 2). Part 1, dose escalation will explore multiple ascending doses of RLY-8161 in participants with any advanced NRAS-mutant solid tumor until maximum tolerated dose is reached or one or more recommended Phase 2 dose (RP2D) is identified. Part 2, dose expansion will be at the RP2D(s) identified in Part 1 in NRAS-mutant solid tumors.

Eligibility Criteria

Age Range: 18 years to No maximum

Inclusion Criteria: * Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1. * Histologically confirmed diagnosis of unresectable Stage III or IV melanoma or other solid tumor. * Disease is refractory to standard therapy (including targeted therapy), participant is intolerant of standard therapy, or participant has declined standard therapy. * Measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. * One or more documented primary oncogenic NRAS mutation(s). Exclusion Criteria: * Known activating KRAS, HRAS, or BRAF mutation or known alterations in other driver oncogenes. * Prior treatment with ERK, MEK, RAF, or RAS targeting agents or any agent whose mechanism of action is to inhibit the RAS-MAPK pathway. * For participants with melanoma: lactate dehydrogenase (LDH) \>2×ULN. * Central nervous system (CNS) metastases that are associated with progressive neurologic symptoms or require ongoing corticosteroids to control the CNS disease.

Interventions

DRUG

RLY-8161

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Conditions

Advanced NRAS-Mutant MelanomaAdvanced NRAS-Mutant Solid TumorsNRAS MutationNRAS G12DNRAS G13RNRAS G13DNRAS G12VNRAS Q61RNRAS Q61KNRAS Q61LNRAS Q61H

Locations

University of California, Los Angeles

Los Angeles, California 90095

United States

University of California, San Francisco

San Francisco, California 94143

United States

University of Colorado Hospital

Aurora, Colorado 80045

United States

Massachusetts General Hospital

Boston, Massachusetts 02114

United States

Dana Farber Cancer Institute

Boston, Massachusetts 02215

United States

START Midwest, LLC

Grand Rapids, Michigan 49546

United States

Memorial Sloan Kettering Cancer Center

New York, New York 10065

United States

Sarah Cannon Research Institute Oncology Partners

Nashville, Tennessee 37203

United States

NEXT Virginia

Fairfax, Virginia 22031

United States