EZH2 Inhibitor Zeprumetostat in Combination Therapy for Patients With Relapsed or Refractory Mature T-cell and NK-cell Lymphomas

January 4, 2026 updated by: Qingqing Cai, Sun Yat-sen University

An Open-label, Multicenter, Exploratory Clinical Study of the EZH2 Inhibitor Zeprumetostat in Combination Therapy for Patients With Relapsed or Refractory Mature T-cell and NK-cell Lymphomas.

This is a prospective, multicenter, open-label, phase Ib/II clinical study to evaluate the safety and efficacy of EZH2 inhibitor Zeprumetostat in combination therapy for patients with relapsed or refractory mature T-cell and NK-cell lymphomas.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet 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.
60

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 2
  • 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.

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:

  • Voluntarily participate in the clinical study; fully understand and be informed about the study and sign the Informed Consent Form (ICF); willing to comply with and capable of completing all trial procedures;
  • Age ≥ 18 years
  • Pathologically confirmed mature T-cell and NK-cell lymphomas.
  • Using the Lugano 2014 criteria, the patient must have at least one measurable or evaluable lesion
  • Participants must have experienced disease progression, treatment failure, or intolerance following standard therapy. Patients with ALCL are required to have previously received anti-CD30-targeted therapy, while patients with NKTCL must have previously been treated with pegaspargase or L-asparaginase.
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0-2
  • Adequate organ and bone marrow function

Exclusion Criteria:

  • Lymphoma involvement in the central nervous system or meninges
  • Active infections
  • Prior treatment with an EZH2 inhibitor or an EZH1/2 dual inhibitor that was discontinued due to intolerance to toxicity;
  • For patients enrolled in Cohort 1, prior treatment with a JAK inhibitor that was discontinued due to intolerance to toxicity;
  • For patients enrolled in Cohort 2, prior treatment with an HDAC inhibitor that was discontinued due to intolerance to toxicity.
  • History of Human Immunodeficiency Virus (HIV) infection and/or Acquired Immunodeficiency Syndrome (AIDS).
  • Patients with mental disorders or those unable to provide informed consent
  • Any other condition deemed by the investigator to be unsuitable for study enrollment;
  • Pregnant or breastfeeding women, and subjects of childbearing potential who are unwilling to use contraception;
  • Individuals with a known hypersensitivity to any of the investigational drugs.

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: Zeprumetostat Combined with Golidocitinib or Chidamide
In Cohort 1, patients will receive Zeprumetostat in combination with Golidocitinib, with an initial dose of 350mg of Zeprumetostat. Each treatment cycle is 28 days. The Zeprumetostat will be combined with Golidocitinib at the RP2D dose level for an extension study. In Cohort 2, patients will receive Zeprumetostat in combination with Chidamide, with an initial dose of 350mg of Zeprumetostat. Each treatment cycle is 28 days. The Zeprumetostat will be combined with Chidamide at the RP2D dose level for an extension study.
Drug: Zeprumetostat
350mg, po, bid
Drug: Golidocitinib
Cohort 1: Golidocitinib: 150mg, po, qd
Drug: Chidamide
Cohort 2: Chidamide: 20mg, po, biw

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
Overall response rate(ORR) for Phase 2
Time Frame: Up to 24 months
The proportion of patients who achieve complete remission (CR) or partial remission (PR) as the best response.
Up to 24 months
DLT for Phase 1b
Time Frame: The first cycle after administration (each cycle is 28 days)
To identify the dose-limiting toxicity
The first cycle after administration (each cycle is 28 days)
RP2D for phase Ib
Time Frame: The first cycle after administration (each cycle is 28 days)
To identify the recommended phase 2 dose
The first cycle after administration (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
Duration of Response(DOR)
Time Frame: Up to 4 years
To investigate the preliminary anti-tumor efficacy
Up to 4 years
Progression-free survival(PFS)
Time Frame: Up to 4 years
To investigate the preliminary anti-tumor efficacy
Up to 4 years
Overall survival(OS)
Time Frame: Up to 4 years
To investigate the preliminary anti-tumor efficacy
Up to 4 years
Complete response rate (CRR)
Time Frame: Up to 24 months
Defined as the proportion of patients who achieve complete remission as the best response
Up to 24 months

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.
Sun Yat-sen University

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 (Estimated)

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.
January 1, 2026

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.
January 1, 2028

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.
January 1, 2030

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 20, 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.
January 4, 2026

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.
January 14, 2026

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.
January 14, 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.
January 4, 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.
December 1, 2025

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.
  • B2025-804

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

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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