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NCT07458347PHASE1Recruiting

A Phase 1 Dose-escalation Trial of KST-6051 in Participants With Advanced Solid Tumors With Kirsten Rat Sarcoma Viral Oncogene Homolog (KRAS) Mutation

Kestrel Therapeutics, Inc.

Start Date

4/21/2026

Completion Date

5/1/2028

Summary

The main purpose of the trial is to assess whether the trial drug, KST-6051, is safe and tolerable when administered orally to adults with advanced or metastatic solid tumors with certain KRAS mutations.

Detailed Description

This is a first-in-human, phase 1, open-label, multicenter clinical trial designed to evaluate safety, tolerability, pharmacokinetics, biomarkers, pharmacodynamics and preliminary activity of orally administered KST-6051. The trial seeks to enroll adults with advanced or metastatic KRAS mutant solid tumors including but not limited to pancreatic ductal adenocarcinoma, colorectal cancer, and non-small cell lung cancer whose cancers have progressed after prior therapy or in whom standard therapy was not tolerated. The trial includes a dose escalation phase in which higher doses of KST-6051 will be given in subsequent groups of participants. Participants can stay in the trial as long as they benefit from the treatment and can tolerate it.

Eligibility Criteria

Age Range: 18 years to No maximum

Inclusion Criteria: 1. Age ≥ 18 years. 2. Willing and able to give written informed consent. 3. Histologically documented locally advanced and unresectable or metastatic NSCLC, PDAC, CRC, or other solid tumor. 4. Documentation of KRAS mutation prior to the first dose of trial drug(s). 5. Progressed on or intolerant to standard treatment(s). 6. Eastern Cooperative Oncology Group Performance Status (ECOG PS) of 0 or 1. 7. Adequate cardiovascular, hematological, liver, and renal function. 8. Measurable disease at baseline per Response Evaluation Criteria In Solid Tumors version 1.1 (RECIST 1.1). Exclusion Criteria: 1. Previous or current treatment with RAS or KRAS inhibitors. 2. Central nervous system (CNS) tumors or metastases. 3. Inability to swallow oral medications. 4. Pregnant, breastfeeding, or expecting to conceive or father children within the projected duration of the trial. Other inclusion/exclusion criteria are specified in the protocol.

Interventions

DRUG

KST-6051

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Conditions

KRAS-mutant Non-small Cell Lung Cancer (NSCLC)KRAS-mutant Pancreatic Ductal Adenocarcinoma (PDAC)KRAS-mutant Colorectal Cancer (CRC)Other KRAS-mutant Solid Tumors

Locations

Cedars-Sinai Medical Center

Los Angeles, California 90048

United States

Florida Cancer Specialists

Sarasota, Florida 34232

United States

Moffitt Cancer Center

Tampa, Florida 33612

United States

Mass General Brigham Cancer Institute at Massachusetts General Hospital

Boston, Massachusetts 02114

United States

Sidney Kimmel Cancer Center

Philadelphia, Pennsylvania 19107

United States

The University of Texas MD Anderson Cancer Center

Houston, Texas 77030

United States

NEXT Oncology

San Antonio, Texas 78229

United States

Huntsman Cancer Institute, University of Utah

Salt Lake City, Utah 84112

United States

NEXT Virginia

Fairfax, Virginia 22031

United States