Study of the RNR Inhibitor BBI-825 in Subjects With Tumors With Resistance Gene Amplifications (STARMAP)

June 5, 2026 updated by: Boundless Bio, Inc.

An Open-Label, Multicenter, First-in-Human, Dose-Escalation and Dose-Expansion, Phase 1/2 Study of BBI-825 and BBI-825 in Combination With Select Targeted Therapies in Subjects With Locally Advanced or Metastatic Solid Tumors With Resistance Gene Amplifications

BBI-825 is a potent, selective, oral, small molecule inhibitor of ribonucleotide reductase (RNR). This is a first-in-human, open-label, non-randomized, 3-part, Phase 1/2 study to determine the safety profile and identify the maximum tolerated dose and recommended Phase 2 dose of BBI-825 administered as a single agent and in combination with select targeted therapies.

Study Overview

Status

Status

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

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.

Detailed Description

BBI-825 will be administered orally (PO) twice daily (BID) to subjects with locally advanced or metastatic non-resectable solid tumors, whose disease has progressed despite all standard therapies or for whom no further standard or clinically acceptable therapy exists.

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.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
19

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

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.

Study Contact Backup

Study Locations

  • United States
    • California
      • Santa Monica, California, United States, 90403
        • Sarcoma Oncology Research Center
    • Michigan
      • Grand Rapids, Michigan, United States, 49546
        • START MidWest
    • New York
      • New York, New York, United States, 10065
        • Memorial Sloan Kettering Cancer Center
    • Texas
      • Irving, Texas, United States, 75039
        • NEXT Oncology
      • San Antonio, Texas, United States, 78229
        • NEXT Oncology

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

No

Description

Inclusion Criteria:

  • Locally advanced or metastatic non-resectable solid tumors, whose disease has progressed despite all standard therapies or for whom no further standard or clinically acceptable therapy exists,
  • Availability of FFPE tumor tissue, archival or newly obtained,
  • Measurable disease as defined by RECIST Version 1.1,
  • Adequate hematologic function,
  • Adequate hepatic and renal function,
  • Eastern Cooperative Oncology Group performance status (ECOG PS) 0 or 1,
  • Other inclusion criteria per study protocol.

Exclusion Criteria:

  • Prior exposure to a selective RNR inhibitor (Note: Prior exposure to chemotherapies with nonselective RNR inhibitory activity e.g., gemcitabine is permitted),
  • Receipt of any approved or considered standard of care anticancer drug(s) or biological product(s) within 4 weeks or 5 half-lives,
  • Hematologic malignancies,
  • Primary CNS malignancy, leptomeningeal disease, or symptomatic active CNS metastases, with exceptions per study protocol,
  • Prior or concurrent malignancies, with exceptions per study protocol,
  • History of HBV, HCV, or HIV infection,
  • Clinically significant cardiac condition,
  • Active or history of interstitial lung disease (ILD) or pneumonitis, or history of ILD or pneumonitis requiring steroids or other immunosuppressive medications,
  • QTcF > 470 msec,
  • Concurrent use of strong inhibitors or inducers of CYP3A, CYP2C8, CYP2C9, or CYP2C19,
  • Other exclusion criteria per study protocol.

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?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
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.
Experimental: Single Agent Dose Escalation
Single agent BBI-825, administered orally, twice daily, in 28-day cycles
Drug: BBI-825
Oral RNR inhibitor
Other Names:
  • ribonucleotide reductase inhibitor

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Frequency and severity of treatment emergent adverse events (TEAEs) of BBI-825
Time Frame: Start of Cycle 1 until 30 days following last dose (each cycle is 28 days)
TEAEs will be assessed and severity assigned by using the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0.
Start of Cycle 1 until 30 days following last dose (each cycle is 28 days)
Maximum Tolerated Dose (MTD) and/or Recommended Phase 2 Dose (RP2D) of BBI-825
Time Frame: Start of Cycle 1 until 30 days following last dose (each cycle is 28 days)
The MTD and/or RP2D of BBI-825 will be determined.
Start of Cycle 1 until 30 days following last dose (each cycle is 28 days)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Maximum observed plasma concentration (Cmax) of BBI-825
Time Frame: Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Maximum observed plasma concentration (Cmax) of BBI-825 will be determined.
Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Trough observed plasma concentration (Ctrough) of BBI-825
Time Frame: Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Trough observed plasma concentration (Ctrough) of BBI-825 will be determined.
Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Time to Cmax (Tmax) of BBI-825
Time Frame: Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Time to Cmax (Tmax) of BBI-825 will be determined.
Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Area under the concentration time curve (AUC) of BBI-825
Time Frame: Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Area under the concentration time curve (AUC) of BBI-825 will be determined.
Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Anti-tumor activity of BBI-825 as determined by RECISTv1.1
Time Frame: Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)
Number of participants achieving a best response of progressive disease, stable disease, partial response, or complete response.
Start of Cycle 1 until Day 1 of last treatment cycle (each cycle is 28 days)

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.
Boundless Bio, 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: Robert Doebele, MD, Boundless Bio, 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 Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 28, 2024

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 25, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 25, 2025

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).
February 26, 2024

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 7, 2024

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.
March 8, 2024

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.
June 8, 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.
June 5, 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.
June 1, 2026

More Information

Terms related to this study

Keywords

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.
  • BBI-825-101

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

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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