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MBG453 in Lower Risk MDS

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04823624
Recruitment Status : Not yet recruiting
First Posted : April 1, 2021
Last Update Posted : April 1, 2021
Information provided by (Responsible Party):
Andrew Mark Brunner, MD, Massachusetts General Hospital

Brief Summary:

This research study is assessing the efficacy of MBG-453, a humanized monoclonal antibody, in treating myelodysplastic syndromes (MDS).

The name of the study drug involved in this study is MBG453.

Condition or disease Intervention/treatment Phase
Myelodysplastic Syndromes Drug: MBG453 Phase 2

Detailed Description:

This is an adaptive two-stage phase II clinical trial to assess the activity of the anti-TIM-3, (T cell immunoglobulin domain and mucin domain) antibody, MBG453, in patients with lower-risk myelodysplastic syndromes (MDS), not eligible for or progressing on frontline therapy.

The U.S. Food and Drug Administration (FDA) has not approved MBG453 for myelodysplastic syndromes (MDS), but it has been approved for other uses.

The study drug (MBG453) may interact with TIM-3 (an antibody which is a protein that attaches to foreign infectious/invading cells and signals the immune system) which might aid the immune system's response by helping immune cells recognize, find, and destroy cancer cells in the body.

The research study procedures include screening for eligibility and study treatment, including evaluations and follow up visits.

Participants will receive study treatment for as long as they and their doctor believe they are benefiting from the study drug. Participants will then be followed for 12 months after their last dose of the study drug or until they withdraw their consent to be contacted.

It is expected that about 20 people will take part in this research study

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 20 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: TIM3 Inhibition With MBG453 for Patients With Lower Risk MDS: an Adaptive Two-Stage Phase II Clinical Trial
Estimated Study Start Date : September 2021
Estimated Primary Completion Date : June 30, 2022
Estimated Study Completion Date : December 31, 2022

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: MG MBG453
Participants will be given MBG453 On Day 1 of each cycle 28 days (4 weeks) study cycle
Drug: MBG453
intravenous infusion

Primary Outcome Measures :
  1. Overall response rate (ORR) [ Time Frame: 6 months ]
    Assessed on the proposal for the modification of the International Working Group (IWG) response criteria in myelodysplasia (Cheson et al., 2006), but modified to include complete remission with partial hematologic improvement CRh (Bloomfield et al., 2018), and the 2018 proposed update for hematologic responses and transfusion independence (TI) (Platzbecker et al., 2019). Patients with dysplastic-type CMML will use MDS risk-stratification and response assessment criteria.

Secondary Outcome Measures :
  1. Number of Participants With Treatment-Related Adverse Events as Assessed by CTCAE Version 5.0 [ Time Frame: during the intervention, an average of 1 year ]
    The number and proportion of adverse events, graded as defined by CTCAE version 5.0 will be tabulated by type and grade.

  2. Overall survival (OS) 1-year [ Time Frame: 1 year ]
    Estimated using the Kaplan and Meier method.

  3. Progression free survival (PFS) [ Time Frame: through study completion, an average of 1 year ]
    Estimated using the Kaplan and Meier method.

  4. Time to disease progression [ Time Frame: through study completion, an average of 1 year ]
    Estimated using the Kaplan and Meier method.

  5. Duration of response [ Time Frame: through study completion, an average of 1 year ]
    Estimated using the Kaplan and Meier method.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Lower risk MDS patients (IPSS-R score ≤ 3.5 at diagnosis) who have progressed or are refractory to/intolerant of prior therapy and meet one of the following categories:

    • RBC transfusion dependent according to IWG criteria must either be unresponsive to prior ESA therapy or have an EPO level > 500
    • Prior HMA therapy
    • Patients with the following cytopenias who otherwise are felt to require treatment per the treating physician:

      • Platelets < 50k/uL
      • ANC < 500 cells/uL
    • Patients with MDS with isolated del(5q) ("5q- syndrome") must have progressed on or not tolerated lenalidomide
    • Patients who are not felt to be candidates for or lack other standard treatment options. Patients with prior luspatercept exposure are eligible.
    • Patients with dysplastic type CMML (WBC < 13,000 cells/uL) meeting the above criteria are eligible; responses will be assessed using MDS criteria
  • Age ≥18 years. Because no dosing or adverse event data are currently available on the use of MGB453 in participants <18 years of age, children are excluded from this study, but will be eligible for future pediatric trials.
  • ECOG performance status ≤2 (see Appendix A).
  • Participants must have adequate organ and marrow function as defined below within 21 days of treatment:

    • Total bilirubin ≤ 2 mg/dL (unless due to Gilbert's in which case it must be <3 mg/dL)
    • AST(SGOT)/ALT(SGPT) ≤3 × institutional ULN
    • Creatinine clearance ≥30 mL/min/1.73 m2 (by MDRD calculation)
  • Human immunodeficiency virus (HIV)-infected participants on effective anti-retroviral therapy with undetectable viral load over the prior 6 months are eligible for this trial.
  • Participants with known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Functional Classification. To be eligible for this trial, participants should be class 2B or better.
  • Ability to understand and the willingness to sign a written informed consent document.

Exclusion Criteria:

  • Participants who have had chemotherapy or radiotherapy within 14 days or five half-lives, whichever is shorter, prior to the first dose of study treatment.
  • Participants who are receiving any other investigational agents; a washout of 14 days or 5 half-lives, whichever is longer, is required. The washout period for biologic agents should be 28 days since the last dose.
  • Prior exposure to a TIM-3 inhibitor.
  • Active autoimmune disease requiring > 10 mg per day of prednisone or the equivalent. Inactive or controlled autoimmune disease is allowed.
  • Prior solid organ transplant is exclusionary. Patients with prior hematopoietic cell transplant are eligible if they are over 6 months from transplant and not on any related immunosuppressive therapy.
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to MBG453.
  • Active untreated or concurrent malignancy that is distinct in primary site or histology, excluding:

    • The following will not be exclusionary: non-melanoma skin cancer, noninvasive colonic polyps, superficial bladder tumors, cervical cancer in-situ, ductal carcinoma in situ of the breast, monoclonal B-cell lymphocytosis, or monoclonal gammopathy of undetermined significance.
    • Hormonal therapy is allowed.
    • History of other malignancy is allowed if not requiring active management.
    • Other malignancies that were treated with curative intent at least 1 year prior to study screening and without evidence of active disease will be allowed.
    • Participants with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial pending discussion with the principal investigator.
  • Participants with uncontrolled intercurrent illness.
  • Participants must not have clinically active HBV or HCV; testing is not required
  • Receipt of a live vaccination within 28 days of cycle 1 day 1
  • Participants with psychiatric illness/social situations that would limit compliance with study requirements.
  • Female contraception is required. Pregnant women are excluded from this study because MBG453 is an agent with the potential for teratogenic or abortifacient effects. Because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother with MBG453, breastfeeding should be discontinued. Women of child-bearing potential should use highly effective methods of contraception during treatment and for 150 days after the last dose of MBG453.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04823624

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Contact: Andrew Brunner, MD 617-724-1124

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United States, Massachusetts
Massachusetts General Hospital Cancer Center
Boston, Massachusetts, United States, 02114
Contact: Andrew Brunner, MD    617-724-1124   
Principal Investigator: Andrew Brunner, MD         
Brigham and Women's Hospital
Boston, Massachusetts, United States, 02215
Contact: Marlise Luskin, MD, MSCE    617-632-1906   
Principal Investigator: Marlise Luskin, MD, MSCE         
Dana-Farber Cancer Institute
Boston, Massachusetts, United States, 02215
Contact: Marlise Luskin, MD, MSCE    617-632-1906   
Principal Investigator: Marlise Luskin, MD, MSCE         
Sponsors and Collaborators
Massachusetts General Hospital
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Principal Investigator: Andrew Brunner, MD Massachusetts General Hospital
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Responsible Party: Andrew Mark Brunner, MD, Principal Investigator, Massachusetts General Hospital Identifier: NCT04823624    
Other Study ID Numbers: 20-637
First Posted: April 1, 2021    Key Record Dates
Last Update Posted: April 1, 2021
Last Verified: March 2021
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: The Dana-Farber / Harvard Cancer Center encourages and supports the responsible and ethical sharing of data from clinical trials. De-identified participant data from the final research dataset used in the published manuscript may only be shared under the terms of a Data Use Agreement. Requests may be directed to: [contact information for Sponsor Investigator or designee]. The protocol and statistical analysis plan will be made available on only as required by federal regulation or as a condition of awards and agreements supporting the research.
Supporting Materials: Study Protocol
Statistical Analysis Plan (SAP)
Informed Consent Form (ICF)
Time Frame: Data can be shared no earlier than 1 year following the date of publication
Access Criteria: Contact the Partners Innovations team at

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Andrew Mark Brunner, MD, Massachusetts General Hospital:
Myelodysplastic Syndromes
Additional relevant MeSH terms:
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Myelodysplastic Syndromes
Bone Marrow Diseases
Hematologic Diseases
Precancerous Conditions