RECRUITING

A Study of Mezagitamab in Adults With Chronic Primary Immune Thrombocytopenia

Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

Primary immune thrombocytopenia (ITP) is a condition where the immune system mistakenly destroys platelets, which are cells that help stop bleeding. This leads to a low number of platelets, making it easier to bruise or bleed. The main aim of this study is to learn whether mezagitamab, when given just under the skin (subcutaneously \[SC\]), is effective in keeping the platelet count of adults with ITP stable when compared to a placebo. A placebo looks like medicine but doesn't have any active ingredients in it. The participants will be treated with mezagitamab for up to 6 months. During the study, participants will visit their study clinic several times. Participants who complete the TAK-079-3002 study or do not have any response to study treatment by week 16 (according to study criteria) will be given the opportunity to participate in a continuation study to receive open label mezagitamab (if they are eligible and the site is able to open the continuation study).

Official Title

A Phase 3, Randomized, Double-blind, Placebo-controlled Study to Evaluate Efficacy and Safety of Mezagitamab Subcutaneous Injection in Participants With Chronic Primary Immune Thrombocytopenia

Quick Facts

Study Start:2025-02-27
Study Completion:2027-12-28
Study Type:Not specified
Phase:Not Applicable
Enrollment:Not specified
Status:RECRUITING

Study ID

NCT06722235

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.

Ages Eligible for Study:18 Years
Sexes Eligible for Study:ALL
Accepts Healthy Volunteers:No
Standard Ages:ADULT, OLDER_ADULT
Inclusion CriteriaExclusion Criteria
  1. 1. The participant has been diagnosed with ITP that has persisted for at least 12 months.
  2. 2. The participant's diagnosis of ITP is supported by a prior response to an ITP therapy (not including a thrombopoietin receptor agonist \[TPO-RA\]), defined as having achieved a platelet count ≥50,000/μL.
  3. 3. The participant has evidence of insufficient response or intolerance to at least 1 currently available first-line therapy for treatment of ITP (for example, corticosteroids), and at least 1 currently available second-line therapy for treatment of ITP (for example, TPO-RA, rituximab, fostamatinib, mycophenolate). Insufficient response to previous treatment is defined as failure to achieve a sustained platelet count of at least 50,000/μL or doubling of baseline platelet count after an appropriate course of prior ITP treatment. Intolerance is defined as a documented side effect causing discontinuation of the therapy.
  4. 4. The participant has a mean platelet count of \<30,000/μL.
  5. 5. If the participant is receiving allowed standard-of-care treatment for ITP at screening, and continued use is intended, treatment may continue during the trial if the dose, and frequency have been stable for at least 4 weeks before receiving the first dose of IMP (i.e., Day 1), and are expected to remain stable throughout the trial.
  6. 6. If the participant is an individual with potential for pregnancy, the participant is not pregnant as confirmed by negative human chorionic gonadotropin during screening, and before the first dose of trial intervention.
  1. 1. The participant has secondary ITP.
  2. 2. The participant has had any thrombotic or embolic event within 12 months before signing the informed consent form (ICF).
  3. 3. The participant has had a splenectomy within 3 months before signing the ICF.
  4. 4. The participant has active infection with hepatitis B virus, hepatitis C virus, or human immunodeficiency virus (HIV).
  5. 5. History of malignancy (including myelodysplastic syndrome) within 5 years of signing the ICF, except for treated non-melanoma skin cancer or cervical carcinoma in situ.
  6. 6. In the opinion of the investigator, the participant has a serious medical or psychiatric illness that could potentially interfere with the completion of treatment according to this protocol.
  7. 7. The participant has received anti-cluster of differentiation (CD)20 treatment within 12 months before screening, and either of the following applies:
  8. 1. The last dose was received within 6 months before screening.
  9. 2. The last dose was received between 6, and 12 months before screening, and the participant has a cluster of differentiation 19 positive (CD19+) count below the lower limit of normal.
  10. 8. The participant has received any monoclonal or polyclonal antibody for immunomodulation within 6 months before Day 1.
  11. 9. The participant has any prior exposure to mezagitamab or has been exposed to another investigational agent within 4 weeks or 5 half-lives, whichever is longer, before Day 1.
  12. 10. The participant has used anticoagulants (e.g., vitamin K antagonists, direct oral anticoagulants) within 3 weeks prior to the first dose of trial treatment.
  13. 11. The participant has received a live or live-attenuated vaccine within 4 weeks prior to the first dose of trial treatment or has any live or live-attenuated vaccine planned during the trial.
  14. 12. The participant has used the following immunosuppressive agents as specified prior to the first dose of trial treatment: alkylating agents (e.g., cyclophosphamide) within 8 weeks, vinca alkaloids (e.g., vincristine) within 4 weeks, sulfones (e.g., dapsone) within 3 weeks, antiproliferative agents: (e.g., mycophenolate mofetil, and azathioprine) within 2 weeks, and calcineurin inhibitors: (e.g., cyclosporine) within 2 weeks.
  15. 13. The participant has used intravenous immunoglobulin (IVIg), SC immunoglobulin, recombinant human thrombopoietin, anti-D immunoglobulin treatment, or efgartigimod within 4 weeks before signing the ICF or it is expected that any treatment for thrombocytopenia other than the participant's standard-of-care ITP therapy (e.g., rescue therapy, administration of blood products) may be used between screening, and Day 1.
  16. 14. The participant has a history of severe allergic or anaphylactic reactions to recombinant proteins or excipients used in the mezagitamab/placebo formulation.

Contacts and Locations

Study Contact

Takeda Contact
CONTACT
+1-877-825-3327
medinfoUS@takeda.com

Principal Investigator

Study Director
STUDY_DIRECTOR
Takeda

Study Locations (Sites)

Keck Medicine of USC
Los Angeles, California, 90033
United States
Rocky Mountain Movement Disorders Center | Englewood, CO
Englewood, Colorado, 80113
United States
Georgetown University Medical Center (GUMC) - Lombardi Comprehensive Cancer Center (LCCC)
Washington, District of Columbia, 20007
United States
University Of Louisville
Louisville, Kentucky, 40202-3229
United States
Massachusetts General Hospital
Boston, Massachusetts, 02114
United States
Duke University Hospital
Durham, North Carolina, 27710
United States
East Carolina University
Greenville, North Carolina, 27834
United States
Hospital of The University of Pennsylvania
Philadelphia, Pennsylvania, 19104
United States
Lewis Katz School of Medicine at Temple University
Philadelphia, Pennsylvania, 19140
United States
Baylor College of Medicine
Houston, Texas, 77030
United States
Versiti Wisconsin, Inc
Milwaukee, Wisconsin, 53233
United States

Collaborators and Investigators

Sponsor: Takeda

  • Study Director, STUDY_DIRECTOR, Takeda

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 Registration Dates

Study Start Date2025-02-27
Study Completion Date2027-12-28

Study Record Updates

Study Start Date2025-02-27
Study Completion Date2027-12-28

Terms related to this study

Keywords Provided by Researchers

  • Thrombocytopenia
  • TAK-079
  • Blood Platelet Disorders
  • Hematologic Diseases
  • Cytopenia
  • Purpura
  • Hemorrhagic Disorders
  • Autoimmune Diseases
  • Immune System Diseases
  • Hemorrhage
  • Skin Manifestations
  • Purpura, Thrombocytopenic, Idiopathic
  • Purpura, Thrombocytopenic

Additional Relevant MeSH Terms

  • Immune Thrombocytopenic Purpura (ITP)