Valemetostat Tosylate (DS-3201b) Phase 2 Study in Relapsed or Refractory Adult T-cell Leukemia/Lymphoma

February 6, 2025 updated by: Daiichi Sankyo Co., Ltd.

A Phase 2, Multicenter, Open-label, Single-arm Study of Valemetostat Tosylate (DS-3201b) in Patients With Relapsed or Refractory Adult T-cell Leukemia/Lymphoma

This Phase 2 study will be conducted to assess the efficacy and safety of valemetostat tosylate (DS-3201b) in participants with relapsed or refractory adult T-cell leukemia/lymphoma (r/r ATL).

Study Overview

Status

Status

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

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 (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.
25

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

Contacts and Locations

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

Study Locations

  • Japan
      • Kagoshima-city, Japan
        • Kagoshima University Hospital
      • Nagasaki-shi, Japan
        • Nagasaki University Hospital
    • Aichi
      • Nagoya-shi, Aichi, Japan
        • Nagoya City University Hospital
    • Chiba
      • Kashiwa-shi, Chiba, Japan
        • National Cancer Center Hospital East
    • Ehime
      • Tōon-shi, Ehime, Japan
        • Ehime University Hospital
    • Fukuoka
      • Fukuoka-shi, Fukuoka, Japan
        • Kyushu University Hospital
      • Fukuoka-shi, Fukuoka, Japan
        • National Hospital Organization Kyushu Cancer Center
    • Hokkaido
      • Sapporo-shi, Hokkaido, Japan
        • Hokkaido University Hospital
    • Kagoshima
      • Kagoshima-shi, Kagoshima, Japan
        • Imamura General Hospital
    • Kochi
      • Nankoku-shi, Kochi, Japan
        • Kochi Medical School Hospital
    • Kumamoto
      • Kumamoto-shi, Kumamoto, Japan
        • Kumamoto University Hospital
    • Miyagi
      • Sendai-shi, Miyagi, Japan
        • National University Corporation Tohoku University Tohoku University Hospital
    • Miyazaki
      • Miyazaki-shi, Miyazaki, Japan
        • University of Miyazaki Hospital
    • Nagasaki
      • Sasebo-shi, Nagasaki, Japan
        • Local Incorporated Administrative Agency Sasebo City General Hospital
    • Okayama
      • Okayama-shi, Okayama, Japan
        • Okayama University Hospital
    • Okinawa
      • Nakagami-gun, Okinawa, Japan
        • University of the Ryukyus hospital
    • Osaka
      • Osaka-shi, Osaka, Japan
        • Osaka International Cancer Institute
      • Osakasayama-shi, Osaka, Japan
        • Kindai University Hospital
      • Suita-shi, Osaka, Japan
        • Osaka University Hospital
    • Saga
      • Saga-shi, Saga, Japan
        • Saga University Hospital
    • Saitama
      • Hidaka-shi, Saitama, Japan
        • Saitama Medical University International Medical Center
    • Shizuoka
      • Hamamatsu-shi, Shizuoka, Japan
        • Hamamatsu University Hospital
    • Tokyo
      • Chuo Ku, Tokyo, Japan
        • National Cancer Center Hospital
      • Minato-Ku, Tokyo, Japan
        • IMSUT Hospital, The Institute of Medical Science, The University of Tokyo

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

20 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Participants with relapsed or refractory adult T-cell leukemia/lymphoma (ATL) who have history of treatment with mogamulizumab or are mogamulizumab intolerant, contraindication after treatment with at least 1 medication regimen
  • Aged ≥20 years or older at the time of signing the informed consent
  • Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 0-2
  • At least 1 evaluable lesion
  • Participants who have defined laboratory criteria
  • Life expectancy ≥ 3 months

Exclusion Criteria:

  • A presence of central nervous system involvement at the time of screening tests
  • Have poorly controlled complication (eg. chronic congestive heart failure, unstable angina
  • ≥ Grade 3 neuropathy
  • QT interval corrected using Fridericia's method (QTcF) >470 ms
  • Has an uncontrolled infection
  • Participants who use corticosteroids over 10 mg/day
  • Receipt of allogeneic hematopoietic stem cell transplantation
  • History of, or concurrent, malignant tumors

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: DS-3201b
Drug: Valemetostat Tosylate
Once a day, 200 mg, oral administration
Other Names:
  • DS-3201b

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) assessed by central evaluation organization
Time Frame: Through the end of the study (within approximately 5 years)
The percentage of participants who were assessed for best overall response, who achieved complete remission (CR), complete remission, unconfirmed (CRu) or partial remission (PR) by central evaluation organization.
Through the end of the study (within approximately 5 years)

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
Overall response rate (ORR) assessed by investigator
Time Frame: Through the end of the study (within approximately 5 years)
The percentage of participants who were assessed for best overall response, who achieved CR, CRu, or PR by investigator.
Through the end of the study (within approximately 5 years)
Best response per tumor lesions
Time Frame: Through the end of the study (within approximately 5 years)
Best response in target lesions (nodal or extranodal lesions), peripheral blood lesions, and skin lesions.
Through the end of the study (within approximately 5 years)
Complete remission rate (CR rate)
Time Frame: Through the end of the study (within approximately 5 years)
The percentage of participants who were assessed for best overall response, who achieved CR or CRu.
Through the end of the study (within approximately 5 years)
Tumor control rate (TCR)
Time Frame: Through the end of the study (within approximately 5 years)
The percentage of participants who were assessed for best overall response, who achieved CR, CRu, PR or stable disease (SD).
Through the end of the study (within approximately 5 years)
Time to response (TTR)
Time Frame: Through the end of the study (within approximately 5 years)
Period from the first day of DS-3201b dose to the first day of CR, CRu, or PR
Through the end of the study (within approximately 5 years)
Duration of response (DOR)
Time Frame: Through the end of the study (within approximately 5 years)
Period from first CR, CRu, or PR to residual disease/progressive disease (RD/PD) or death.
Through the end of the study (within approximately 5 years)
Progression-free survival (PFS)
Time Frame: Through the end of the study (within approximately 5 years)
Period from the first day of DS-3201b dose to the day of RD/PD or death.
Through the end of the study (within approximately 5 years)
Overall survival (OS)
Time Frame: Through the end of the study (within approximately 5 years)
Period from the first day of DS-3201b dose to death.
Through the end of the study (within approximately 5 years)

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.
Daiichi Sankyo Co., Ltd.

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: Clinical Study Leader, Daiichi Sankyo

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 21, 2019

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.
April 24, 2021

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.
October 27, 2024

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).
September 23, 2019

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.
September 23, 2019

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.
September 25, 2019

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.
March 25, 2025

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.
February 6, 2025

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.
February 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.
  • DS3201-A-J201
  • 194964 (Other Identifier: JAPIC CTI)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

De-identified individual participant data (IPD) and applicable supporting clinical trial documents may be available upon request at https://vivli.org/. In cases where clinical trial data and supporting documents are provided pursuant to our company policies and procedures, Daiichi Sankyo will continue to protect the privacy of our clinical trial participants. Details on data sharing criteria and the procedure for requesting access can be found at this web address: https://vivli.org/ourmember/daiichi-sankyo/

IPD Sharing Time Frame

Studies for which the medicine and indication have received European Union (EU) and United States (US), and/or Japan (JP) marketing approval on or after 01 January 2014 or by the US or EU or JP Health Authorities when regulatory submissions in all regions are not planned and after the primary study results have been accepted for publication.

IPD Sharing Access Criteria

Formal request from qualified scientific and medical researchers on IPD and clinical study documents from clinical trials supporting products submitted and licensed in the United States, the European Union and/or Japan from 01 January 2014 and beyond for the purpose of conducting legitimate research. This must be consistent with the principle of safeguarding study participants' privacy and consistent with provision of informed consent.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • CSR

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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