A Study of 14C-Bleximenib (Radiolabeled) in Participants With Acute Leukemia

July 30, 2026 updated by: Janssen Research & Development, LLC

An Open-Label Study to Investigate the Absorption, Metabolism, And Excretion (AME) Of 14C-Bleximenib (JNJ-75276617) in Participants With Acute Leukemia

The purpose of this study is to assess how the body absorbs, breaks down (metabolism), and removes (excretes) radiolabeled bleximenib (a drug molecule that has been chemically bonded with a radioactive isotope which emits radiation making it easier to track in the body) in participants with acute leukemia (highly aggressive blood cancer typically characterized by large numbers of immature white blood cells in the bone marrow).

Study Overview

Status

Status

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

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.
Interventional

Enrollment (Estimated)

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.
10

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 Locations

  • United Kingdom
      • Manchester, United Kingdom, M20 4BX
        • Recruiting
        • The Christie NHS Foundation Trust Christie Hospital

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:

  • Body weight greater than or equal to (>=) 40 kilograms (kg)
  • Relapsed or refractory (R/R) acute leukemia harboring histone-lysine N-methyltransferase 2A (KMT2A), nucleophosmin 1 (NPM1), nucleoporin 98 (NUP98) or nucleoporin 214 (NUP214) gene alterations, and has exhausted, or is ineligible for available therapeutic options
  • Eastern cooperative oncology group (ECOG) performance status grade of 0 or 1
  • Regular bowel movements (that is [i.e.], average production of at least one stool every 2 days)
  • A woman of childbearing potential must have a negative highly sensitive serum beta-human chorionic gonadotropin at screening and within 48 hours prior to the first dose of study treatment

Exclusion criteria:

  • Acute promyelocytic leukemia or diagnosis of Down syndrome associated leukemia, according to world health organization (WHO) 2016 criteria
  • Active central nervous system (CNS) disease
  • Recipient of solid organ transplant
  • Any toxicity (except for alopecia, stable peripheral neuropathy, thrombocytopenia, neutropenia, anemia) from previous anticancer therapy that has not resolved to baseline or to Grade 1 or less
  • Major surgery (e.g., requiring general anesthesia) within 2 weeks prior to first dose of study treatment or has not recovered from surgery or has major surgery planned during the time the participant is receiving study treatment

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: Single Group 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: Bleximenib
Participants will receive a single oral dose of 14C-bleximenib on Cycle 1 Day 1. The recommended Phase 2 dose (RP2D) of bleximenib will start on Cycle 1 Day 2 with non-radiolabeled bleximenib and will continue until the end of Cycle 1 (cycle duration=28 days), with subsequent roll-over for eligible participants to 75276617ALE1001 (NCT04811560) for continued non-radiolabeled bleximenib administration as appropriate.
Drug: 14C-bleximenib
14C-bleximenib will be administered orally.
Other Names:
  • JNJ-75276617
Drug: bleximenib
Non-radiolabeled bleximenib will be administered orally.
Other Names:
  • JNJ-75276617

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
Percentage of Dose Excreted in Urine (feu)
Time Frame: Up to Day 28
Total amount excreted into the urine, expressed as a percentage of the administered dose will be reported.
Up to Day 28
Percentage of Dose Excreted in Feces (fef)
Time Frame: Up to Day 28
Total amount excreted into the feces expressed as a percentage of the administered dose will be reported.
Up to Day 28
Amount Excreted in Urine (Aeu)
Time Frame: Up to Day 28
Aeu defined as the total amount of bleximenib and radioactivity excreted into the urine will be reported.
Up to Day 28
Amount Excreted in Feces (Aef)
Time Frame: Up to Day 28
Aef defined as the total amount of bleximenib and radioactivity excreted into the feces will be reported.
Up to Day 28
Area Under the Concentration-Time Curve from Time 0 to the Last Measurable Concentration (AUC0-t)
Time Frame: Cycle 1 Day 1, and Cycle 1 Day 2 (Cycle duration=28 days)
AUC0-t in whole blood and plasma will be reported.
Cycle 1 Day 1, and Cycle 1 Day 2 (Cycle duration=28 days)
Maximum Observed Concentration (Cmax)
Time Frame: Cycle 1 Day 1, and Cycle 1 Day 2 (Cycle duration=28 days)
Maximum observed concentration in whole blood and plasma will be determined.
Cycle 1 Day 1, and Cycle 1 Day 2 (Cycle duration=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
Number of Participants with Adverse Events (AEs) and Serious Adverse Events (SAEs)
Time Frame: Up to 58 days
An AE is any untoward medical occurrence in a clinical study participant administered a pharmaceutical (investigational or non investigational) product. An AE does not necessarily have a causal relationship with the study treatment. A SAE is any untoward medical occurrence that at any dose: results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product and is medically important.
Up to 58 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.
Janssen Research & Development, LLC

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: Janssen Research & Development, LLC Clinical Trial, Janssen Research & Development, LLC

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.
November 18, 2025

Primary Completion (Estimated)

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.
September 29, 2026

Study Completion (Estimated)

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.
September 29, 2026

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).
December 9, 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.
December 9, 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.
December 22, 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 31, 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 30, 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

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.
  • 75276617ALE1006 (Other Identifier: Janssen Research & Development, LLC)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

The data sharing policy of Johnson & Johnson Innovative Medicine is available at www.innovativemedicine.jnj.com/our-innovation/clinical-trials/transparency. As noted on this site, requests for access to the study data can be submitted through Yale Open Data Access (YODA) Project site at yoda.yale.edu.

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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