Extended vs Short-term Abatacept Dosing for Graft Versus Host Disease Prophylaxis

NCT ID: NCT04380740

Last Updated: 2025-05-28

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: PHASE2
• Total Enrollment: 160 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-03-30
• Study Completion Date: 2028-06-30

Brief Summary

This is a multicenter randomized, double blind, Phase 2 trial for patients receiving transplants from 7 of 8 HLA matched donors, in which an extended dosing regimen of abatacept, and a short-term dosing regimen + placebo, when added to standard calcineurin inhibitor + methotrexate-based prophylaxis, will be compared for their ability to improve outcomes in patients with a minimum follow-up of one year post-transplant. All patients will receive 4 doses of abatacept (Days -1, +5, +14, +28). Prior to the fifth dose, patients will be randomly assigned to the 4-dose abatacept arm and receive 4 doses of placebo or 8-dose abatacept arm and receive 4 more doses of abatacept. The primary endpoint of the study will be severe AGVHD-free, severe CGVHD-free, relapse-free survival (SGRFS). The study will end when the last patient has reached 2 years after transplant. Results will first be calculated and the study unblinded when the last patient has reached one year post-transplant.

Conditions

Graft Vs Host Disease

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: TRIPLE

Study Groups

Standard GVHD Prophylaxis + Abatacept + Placebo

Standard GVHD prophylaxis of calcineurin inhibitor (cyclosporine or tacrolimus) and methotrexate + 4 doses of Abatacept (investigational product) + 4 doses of Placebo.

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: DRUG

During the extended dosing of abatacept, those randomized to receive 4 doses will receive a placebo consisting of an equal volume of normal saline solution.

Abatacept

Intervention Type: DRUG

Investigational prophylaxis with extended-dosing abatacept, a calcineurin inhibitor and methotrexate.

Standard GVHD Prophylaxis + Abatacept Extended dosing

Standard GVHD prophylaxis of calcineurin inhibitor (cyclosporine or tacrolimus) and methotrexate + 8 doses of Abatacept.

Group Type: EXPERIMENTAL

Abatacept

Intervention Type: DRUG

Investigational prophylaxis with extended-dosing abatacept, a calcineurin inhibitor and methotrexate.

Interventions

Placebo

During the extended dosing of abatacept, those randomized to receive 4 doses will receive a placebo consisting of an equal volume of normal saline solution.

Intervention Type: DRUG

Abatacept

Investigational prophylaxis with extended-dosing abatacept, a calcineurin inhibitor and methotrexate.

Intervention Type: DRUG

Other Intervention Names

saline; orencia

Eligibility Criteria

Inclusion Criteria

1. Must be at least 2 years old and weigh 10 kg.

2. Must have a willing unrelated adult donor (bone marrow or peripheral blood). Donors may have a single mismatch (i.e. be a 7/8) and this mismatch may be at the allele or antigen level; however, donors with allele level disparity should be given preference over those with antigen level disparity. Patients for whom a donor is available with disparity only in the host versus graft direction (because of recipient homozygosity), will not be eligible, since this mismatching does not increase the risk for GVHD. Centers may perform extended typing (e.g. DQB1 and DPB1) according to institutional practices and use these results in selecting donors; however, it is recommended that this extending typing be used only to select between donors who are equally well matched with the recipient at the A, B, C and DRB1.

3. All patients and/or their parents or legal guardians must sign a written informed consent. Assent, when appropriate, will be obtained according to institutional guidelines.

Exclusion Criteria

5. Patients with an inherited predisposition to leukemia or otherwise hematologic malignancies that have not been associated with predisposition to transplant morbidities or non-hematologic cancers.

6. Karnofsky performance score or Lanskey Play-Performance Scale score >/= 80.

• If the patient does not meet defined eligibility requirements, the PI/study committee must be contacted to determine eligibility.

1. Patients with the following hematologic malignancies will be excluded: Chronic Lymphocytic Leukemia, Myeloma and Primary Myelofibrosis.

2. Active Relapse (>5% blasts) of their primary malignancy.

3. For patients with Acute Lymphocytic Leukemia (ALL) with pre-transplant MRD testing performed as standard practice at the treating institution, patients with MRD >0.01% will be ineligible.

4. For patients with Acute Myeloid Leukemia (AML) with pre-transplant MRD testing as standard of practice at the treating institution, patients with any MRD status are eligible and should be enrolled at the discretion of provider.

5. For patients with MDS, those with >5% blasts will be excluded.

6. Prior allogeneic HCT.

7. Uncontrolled viral, bacterial, fungal or protozoal infection at the time of study enrollment.

8. HIV infection.

9. Serious psychiatric disease including schizophrenia, bipolar disorder and severe depression.

10. Prisoners or others who are compulsorily detained.

11. Any patient with a known or suspected inherited predisposition to cancer should be discussed with the study team prior to screening for eligibility.

1. Patients with a known inherited or constitutional predisposition to transplant morbidities, including, but not limited to Fanconi Anemia, Dyskeratosis Congenita, Shwachman-Diamond Syndrome and Down Syndrome will be excluded.

2. Patients with known inherited or constitutional predisposition to non-hematologic cancers including, but not limited to Li-Fraumeni syndrome, BRCA1 and BRCA2 mutations will be excluded.

12. Patients with active non-hematological malignancies (except non-melanoma skin cancers) or those with non-hematological malignancies (except non-melanoma skin cancers) who have been rendered with no evidence of disease, and are disease free for <2 years.

13. Incompletely treated active tuberculosis Infection.

14. Pregnancy (positive serum b-HCG) or breastfeeding.

15. Estimated GFR of < 50 mL/min/1.73m2.

16. Cardiac ejection fraction < 50 (using M-Mode if assessment is done by ECHO)

17. T.bilirubin > 2 × upper limit of normal or ALT > 4 × upper limit of normal or unresolved veno-occlusive disease.

18. Pulmonary disease with FVC, FEV1 or DLCO parameters <45% predicted (corrected for hemoglobin) or requiring supplemental oxygen. Children who are developmentally unable to perform pulmonary function testing will be assessed solely on their need for supplemental oxygen.

19. Presence of antibodies to a mismatched donor HLA antigen (please refer to Section 3.4.g).

20. Patients who have developed severe AGVHD, severe CGVHD or relapse will be excluded at the time of randomization.

1. Severe allergic reaction during the first 4 doses of abatacept

2. If any clinical events occur that preclude further dosing of abatacept, those patients will be deemed ineligible for randomization

• Minimum Eligible Age: 2 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Bristol-Myers Squibb

INDUSTRY

Sponsor Role: collaborator

Boston Children's Hospital

OTHER

Sponsor Role: lead

Responsible Party

Leslie Kean

Director, Stem Cell Transplantation Program, Division of Hematology/Oncology, Boston Children's Hosptial

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

City Of Hope National Medical Center

Duarte, California, United States

Moffitt Cancer Center

Tampa, Florida, United States

Emory University/Winship Cancer Center

Atlanta, Georgia, United States

University of Chicago

Chicago, Illinois, United States

Massachusetts General Hospital

Boston, Massachusetts, United States

Boston Children's Hospital

Boston, Massachusetts, United States

Beth Israel Deaconess Medical Center

Boston, Massachusetts, United States

Dana-Farber Cancer Institute

Boston, Massachusetts, United States

University of Michigan

Ann Arbor, Michigan, United States

Washington University St. Louis

St Louis, Missouri, United States

University of Rochester

Rochester, New York, United States

Cincinnati Children's Hospital

Cincinnati, Ohio, United States

Oregon Health and Sciences University

Portland, Oregon, United States

Children's Hospital of Philadelphia

Philadelphia, Pennsylvania, United States

Countries

United States

Other Identifiers

20-227

Identifier Type: OTHER

Identifier Source: secondary_id

IRB-P00035528

Identifier Type: -

Identifier Source: org_study_id