A Study of GDX012 in Adults With Relapsed or Refractory Acute Myeloid Leukemia

September 2, 2026 updated by: Takeda

A Phase 1/2a, Open-Label, Dose Escalation, and Dose Expansion Study to Assess the Safety and Efficacy of GDX012 in Patients With Relapsed or Refractory Acute Myeloid Leukemia

GDX012 is a novel cell therapy developed for the treatment of certain types of cancer, including Acute Myeloid Leukemia (AML). The main aims of the study are to learn how safe GDX012 is, how treatment with GDX012 is tolerated and to determine the best dose of GDX012.

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

The drug being tested in this study is called GDX012. GDX012 is being tested to evaluate the safety and tolerability in adult participants with AML.

The study will enroll approximately 53 patients in two phases, dose escalation and dose expansion.

During Phase 1 (sequential dose escalation), participants will be assigned to one of the following treatment groups each consisting of 3 to 6 participants to receive GDX012 at one of the three dose levels:

  1. GDX012 Dose 1
  2. GDX012 Dose 2
  3. GDX012 Dose 3

Upon completion of Phase 1, 1 to 2 dose levels will be selected for Phase 2a of the study. At the completion of Phase 2a of the study a single dose may be selected by the sponsor and investigators as the recommended phase 2 dose (RP2D) for future study.

This multi-center trial will be conducted in the United States and Japan. The overall time to participate in the study is approximately 14 months.

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.
16

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 Locations

  • Japan
      • Kashiwa, Japan, 277-8577
        • National Cancer Center Hospital East
  • United States
    • Alabama
      • Birmingham, Alabama, United States, 35205
        • University of Alabama at Birmingham (UAB) Hospital
    • California
      • Duarte, California, United States, 91010
        • City of Hope
    • Colorado
      • Denver, Colorado, United States, 80218
        • Sarah Cannon/CBCI
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Comprehensive Cancer Center of Northwestern University
    • Massachusetts
      • Boston, Massachusetts, United States, 02215
        • Dana-Farber Cancer Institute
    • Missouri
      • St Louis, Missouri, United States, 63110
        • Washington University
    • New York
      • New York, New York, United States, 10065
        • Thomas Jefferson University
    • Ohio
      • Cleveland, Ohio, United States, 44195
        • Cleveland Clinic
    • Tennessee
      • Nashville, Tennessee, United States, 37203
        • Tri-Star BMT/Sarah Cannon Nashville
    • Texas
      • Houston, Texas, United States, 77030
        • MD Anderson Cancer Center

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion criteria:

  1. Total body weight of ≥40 kg.

  2. Must have pathologically confirmed relapsed or refractory acute myeloid leukemia (R/R AML) including:

    1. Relapsed AML is defined as ≥5% blasts in the bone marrow (BM) or peripheral blood at any time after achieving a CR, CRh, Cri, or MLFS.
    2. Refractory AML is defined as failure to achieve a CR, CRh, Cri, or MLFS after 1 of the following regimens:

    i. Two courses of intensive induction chemotherapy. ii. At least 2 cycles of hypomethylating agent (HMA) or low-dose, cytarabine-based combination regimen.

    iii. At least 4 cycles of HMA monotherapy.

  3. During dose escalation, participants must be ineligible for hematopoietic stem cell transplantation (HSCT).

  4. Must have an anticipated life expectancy of >3 months before lymphodepletion.

  5. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1.

  6. Participants must have adequate renal, cardiac, hepatic, pulmonary and bone marrow function as defined by the protocol.

Exclusion criteria:

  1. Diagnosis of acute promyelocytic leukemia.
  2. Has received or plans to receive any of the excluded therapy/treatment within the specified timeframe before lymphodepleting chemotherapy as defined by the protocol.
  3. Prior allogeneic HSCT within 3 months of signing informed consent form (ICF) or with ongoing requirement for systemic graft-versus-host therapy.
  4. Active central nervous system (CNS) involvement.
  5. History of malignancy other than non-melanoma skin cancer or carcinoma in situ (eg. cervix, bladder, breast) low grade prostate cancer without treatment requirement unless in remission without treatment for ≥2 years.

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: Non-Randomized
  • 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: Phase 1: Dose Escalation of GDX012 (Dose Level 1)

Participants received GDX012 weight-based dose level 1 as an intravenous (IV) infusion on Day 1 of Phase 1, following lymphodepleting chemotherapy. Dose Level 1 was the lowest dose level.
Drug: GDX012

GDX012 suspension for IV infusion.

Other Names:
  • TAK-012
Drug: Chemotherapy Agents

Chemotherapy agents (fludarabine/cyclophosphamide) as per standard of care.
Experimental: Phase 1: Dose Escalation of GDX012 (Dose Level 2)

Participants received GDX012 weight-based dose level 2 as an IV infusion on Day 1 of Phase 1, following lymphodepleting chemotherapy. Dose Level 2 was higher than Dose Level 1.
Drug: GDX012

GDX012 suspension for IV infusion.

Other Names:
  • TAK-012
Drug: Chemotherapy Agents

Chemotherapy agents (fludarabine/cyclophosphamide) as per standard of care.
Experimental: Phase 1: Dose Escalation of GDX012 (Dose Level 3)

Participants received GDX012 weight-based dose level 3 as an IV infusion on Day 1 of Phase 1, following lymphodepleting chemotherapy. Dose Level 3 was higher than Dose Level 2.
Drug: GDX012

GDX012 suspension for IV infusion.

Other Names:
  • TAK-012
Drug: Chemotherapy Agents

Chemotherapy agents (fludarabine/cyclophosphamide) as per standard of care.

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
Number of Participants With Dose Limiting Toxicities (DLTs) to Determine the Maximum Tolerated Dose (MTD) of GDX012
Time Frame: Up to 30 days post infusion

DLTs were defined as events occurring by Day 30 after the first GDX012 infusion considered related to GDX012 if they could not be explained by underlying disease, prior therapy, intercurrent illness, or lymphodepleting chemotherapy. Events were graded according to the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) Version 5.0. DLTs included severe non-hematologic toxicities (Grade 3-4, unresolved or involving vital organs), Grade ≥3 graft versus host disease (GvHD) graded per the Mount Sinai Acute GvHD International Consortium recommendations and 2014 National Institutes of Health (NIH) Consensus, Grade 3-4 cytokine release syndrome (CRS) or immune effector cell-associated neurotoxicity syndrome (ICANS) per American Society for Transplantation and Cellular Therapy (ASTCT) criteria, Grade ≥3 infusion reactions or tumor lysis syndrome (TLS), persistent cytopenia or marrow hypocellularity, and any Grade 5 toxicity attributable to GDX012.
Up to 30 days post infusion
Number of Participants With Treatment-Emergent Adverse Events (TEAEs)
Time Frame: Up to 14 months

An adverse event (AE) is any untoward medical occurrence in a participant administered a pharmaceutical product; the untoward medical occurrence does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product whether or not it is related to the medicinal product. This includes any newly occurring event or a previous condition that has increased in severity or frequency since the administration of study drug. TEAEs are defined as any AE that begins on or after the initiation of treatment with a study intervention or any existing event that worsens following exposure to the study intervention.
Up to 14 months

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
Percentage of Participants With Disease Response
Time Frame: Up to 14 months

Percentage of participants with disease response included participants who achieved complete response (CR), complete response with partial hematologic recovery (CRh), or complete response with incomplete hematologic recovery (CRi), based on responses assessed by the investigator according to the 2022 European Leukemia Net [ELN] response criteria for acute myeloid leukemia (AML). CR was defined as the sum of complete remission and complete remission without measurable residual disease (MRD). CRh was defined as the sum of CRh and CRhMRD-. CRi was defined as the sum of CRi and CRiMRD-.
Up to 14 months
Percentage of Participants With Measurable Residual Disease (MRD) Negative Status as Determined by Flow Cytometry
Time Frame: Up to 14 months

The MRD negative status was defined as (less than) <0.1% detectable disease based on local assessment of bone marrow and/or blood.
Up to 14 months
Duration of Response (DOR)
Time Frame: Up to 14 months

DOR was planned to be assessed for participants with CR, CRh, or CRi and was defined as the time from the date of first documented CR, CRh, or CRi to the date of first documented relapse or death from any cause, whichever comes first. CR was defined as the sum of Complete Remission and Complete Remission without MRD. CRh was defined as the sum of CRh and CRhMRD-. CRi was defined as the sum of CRi and CRiMRD- .
Up to 14 months
Event-free Survival (EFS)
Time Frame: Up to 14 months

EFS was defined as the time from the date of the first GDX012 administration to the date of treatment failure, relapse for those who achieved CR, CRh, or CRi, or death from any cause, whichever came first. CR was defined as the sum of Complete Remission and Complete Remission without MRD (CRMRD-). CRh was defined as the sum of CRh and CRhMRD-. CRi was defined as the sum of CRi and CRiMRD-. EFS was analyzed using the Kaplan-Meier method.
Up to 14 months
Overall Survival (OS)
Time Frame: Up to 14 months

OS was defined as the time from the date of the first GDX012 administration to the date of death from any cause. Participants without documentation of death at the time of analysis were censored at the last contact date. OS was analyzed using the Kaplan-Meier method.
Up to 14 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.
Takeda

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: Medical Director, Takeda

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.

Helpful Links

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.
July 11, 2023

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.
August 20, 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.
November 30, 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).
May 24, 2023

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.
May 24, 2023

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.
June 2, 2023

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.
September 25, 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.
September 2, 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.
September 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.
  • TAK-012-1501
  • jRCT2033240022 (Registry Identifier: jRCT)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.

IPD Sharing Access Criteria

IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/. For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

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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