Expanded Access to Bezuclastinib for Patients With NonAdvanced Systemic Mastocytosis or Advanced Systemic Mastocytosis

July 10, 2026 updated by: Cogent Biosciences, Inc.

Intermediate-Size Patient Population Expanded Access to Bezuclastinib for Patients With NonAdvanced Systemic Mastocytosis or Advanced Systemic Mastocytosis

The purpose of this expanded access program (EAP) protocol is to provide investigational bezuclastinib to patients with a diagnosis of nonadvanced systemic mastocytosis (NonAdvSM) or advanced systemic mastocytosis (AdvSM) who have received and failed or been intolerant to at least one standard approved therapy and/or have no comparable or satisfactory alternative therapy options.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Available

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Expanded Access

Expanded Access Type

Expanded Access Type

Describes the category of expanded access under U.S. Food and Drug Administration (FDA) regulations. There are three types of expanded access:
  • Individual Patients: Allows a single patient, with a serious disease or condition who cannot participate in a clinical trial, access to a drug or biological product that has not been approved by the FDA. This category also includes access in an emergency situation.
  • Intermediate-size Population: Allows more than one patient (but generally fewer patients than through a Treatment IND/Protocol) access to a drug or biological product that has not been approved by the FDA. This type of expanded access is used when multiple patients with the same disease or condition seek access to a specific drug or biological product that has not been approved by the FDA.
  • Treatment IND/Protocol: Allows a large, widespread population access to a drug or biological product that has not been approved by the FDA. This type of expanded access can only be provided if the product is already being developed for marketing for the same use as the expanded access use.
  • Intermediate-size Population

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Alexandra Malinowski, PharmD
  • Phone Number: 1-877-633-8049
  • Email: EAP@cogentbio.com

Study Locations

  • United States
    • California
      • La Jolla, California, United States, 92037
        • Available
        • Orso Health/Modena Asthma Allergy
      • La Jolla, California, United States, 92037
        • Available
        • Scripps Green Hospital
      • Los Angeles, California, United States, 90095
        • Available
        • UCLA Ronald Reagan Medical Center
    • Illinois
      • Normal, Illinois, United States, 61761
        • Available
        • Sneeze Wheeze & Itch Associates LLC Clinical Research Center
    • Indiana
      • Indianapolis, Indiana, United States, 46202
        • Available
        • Indiana University Health
    • Maine
      • Bangor, Maine, United States, 04401
        • Available
        • Northern Light Eastern Maine Medical Center
    • Maryland
      • Bethesda, Maryland, United States, 20889
        • Available
        • Walter Reed
      • Glenn Dale, Maryland, United States, 20769
        • Available
        • AllerVie Health
    • Massachusetts
      • Boston, Massachusetts, United States, 02215
        • Available
        • Dana Farber Cancer Institute
      • Boston, Massachusetts, United States, 02111
        • Available
        • Boston Specialists
    • Michigan
      • Ann Arbor, Michigan, United States, 48109
        • Available
        • Michigan Medicine- University of Michigan
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Available
        • Mayo Clinic
    • Missouri
      • St Louis, Missouri, United States, 63110
        • Available
        • Washington University School of Medicine in St. Louis
    • New Hampshire
      • Lebanon, New Hampshire, United States, 03756
        • Available
        • Dartmouth-Hitchcock Medical Center
    • New York
      • New York, New York, United States, 10065
        • Available
        • Memorial Sloan Kettering Cancer Center
    • North Carolina
      • Durham, North Carolina, United States, 27705
        • Available
        • Duke Blood Cancer Center
    • Ohio
      • Columbus, Ohio, United States, 43210
        • Available
        • The Ohio State University Wexner Medical Center
    • Texas
      • Dallas, Texas, United States, 75231
        • Available
        • AIR Care
      • Houston, Texas, United States, 77030
        • Available
        • Texas Children's Hospital
      • Houston, Texas, United States, 77030
        • Available
        • The University of Texas, MD Anderson Cancer Center
    • Utah
      • Salt Lake City, Utah, United States, 84112
        • Available
        • University of Utah - Huntsman Cancer Institute
      • Sandy City, Utah, United States, 84093
        • Available
        • Allergy Associates of Utah
    • Washington
      • Tacoma, Washington, United States, 98405
        • Available
        • Northwest Medical Specialties

Participation Criteria

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.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

N/A

Description

Key Inclusion Criteria:

  • Able to provide written informed consent and commit to EAP assessments.
  • ≥18 years of age.
  • Able to swallow tablets.
  • Diagnosed with ASM, SM-AHN, MCL, BMM, ISM, or SSM according to the 2022 WHO Classification for SM
  • Not receiving adequate disease control on current therapy(ies).
  • Have clinically acceptable laboratory screening results.

Exclusion Criteria:

  • Patients who are eligible for and/or enrolled in an on-going bezuclastinib clinical trial.
  • Patients who discontinued investigational use of bezuclastinib in previous clinical trials due to toxicity or withdrawal of consent.
  • Pregnant or currently breastfeeding.
  • Prior or ongoing clinically significant illness or medical or physical condition

Other protocol-defined criteria apply.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Cogent Biosciences, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Rachael Easton, MD, PhD, Cogent Biosciences, Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 31, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 31, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 8, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 13, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 10, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CGT9486-IEAP-001

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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