Preemptive Infusion of Donor Lymphocytes Depleted of TCR + T Cells + CD19+ B Cells Following ASCT

Leland Metheny

Status and phase: Withdrawn; Phase 1

Conditions: Acute Myeloid/Lymphoblastic Leukemia; Allogeneic Stem Cell Transplant Candidate; Myeloproliferative Neoplasm; Myelodysplastic Syndrome; Lymphoproliferative Disorders

Treatments: Biological: Cellular therapy product

Study type: Interventional

Funder types: Other

Identifiers

NCT03939585

CASE1Z19

Details and patient eligibility

About

The purpose of this study is to reduce the risk of cancer relapse by giving a donor lymphocyte infusion (DLI) to boost the immune system early after a stem cell transplant so that leukemia cells that escaped chemotherapy can be detected and killed. This DLI will contain mostly lymphocytes that have graft versus tumor effect with low risk of graft versus host disease. Because the process of giving a DLI in the first four weeks after a transplant has not been approved by the Food and Drug Administration (FDA), this study in investigational (experimental).

Full description

The primary objective of this study is to investigate if donor lymphocytes depleted of TCR-αβ T cells and B cells can be infused on Day 28 following allogeneic stem cell transplantation without inducing Grade III-IV graft versus host disease, Grade II GVHD requiring systemic treatment and or new onset, severe neutropenia requiring growth factor support.

This study also seeks to characterize the lymphocyte subsets obtained following depletion of TCR-αβ T cells and B cells from non-mobilized, leukapheresis products.

Additionally, this study will attempt to describe occurrence of disease relapse and to describe the occurrence of post-transplant re- activation and/or infections with viruses such as CMV, and EBV.

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Subjects must have histologic or cytologic confirmation of ANY hematologic malignancy
• Allogeneic stem cell transplant is indicated as management of underlying hematologic malignancy.
• Participant has organ function (cardiac, lung and liver) considered adequate to undergo conditioning chemotherapy and allogeneic stem cell transplant in the assessment of the clinical program
• Participant has a 10/10 HLA-matched sibling donor OR has a HLA-haploidentical donor available (in the absence of a 10/10 HLA matched unrelated donor)
• The related transplant donor is willing, available and consents to undergo a second, non-mobilized leukapheresis for the procurement of donor lymphocytes
• The related transplant donor is 18 years of age or older
• Subjects must have the ability to understand and the willingness to sign a written informed consent document or provide assent.

Exclusion criteria

• Subject is unwilling to receive a prophylactic donor lymphocyte infusion per study protocol.
• The related donor is unwilling or unavailable to undergo a second, non- mobilized leukapheresis for the procurement of donor lymphocytes.
• Women of child-bearing potential and men must agree to use adequate contraception (double barrier method of birth control or abstinence) 4 weeks prior to study entry and for the duration of study participation. Women of child-bearing age must have documented negative pregnancy test prior to start of conditioning regimen for stem cell transplantation and a repeat negative pregnancy test prior to infusion of the lymphocyte product.
• Patients with any of the following organ function abnormalities: Left ventricular ejection fraction (LVEF) < 45%; DLCO <45% of expected value corrected for alveolar volume and hemoglobin; Serum Creatinine >2 times the upper limit of normal.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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0 participants in 1 patient group

NK/γδ T cell-enriched cell therapy product

Experimental group

Description:

This study will treat 10 participants with the donor NK/TCR-γδ T cell product. Of those 10 participants, 5 would have 10/10 HLA matched sibling donors (MSD) while 5 would have partially matched, related (haplo) donors. * 27 days post transplant, the participant's donor will undergo a second, non-mobilized leukapheresis to obtain peripheral blood mononuclear cells (PBMCs). * Donor PBMCs will be processed next day (Day T+28) to obtain the NK cell/TCRγδ T cell product for same day infusion if the participant remains aGVHD free and clinically stable. * Participants will continue routine post-transplant and GVHD monitoring, as well as disease assessment at 56 days, 100 days, 6 months and 1 year following transplant. * Blood samples will be obtained on T=0, T+7, 14, 21 and 28 days and then weekly until T + 56 days, then on T+100 days, + 6 months and + 12 months. If immune-mediated adverse events occur (GVHD, CRS etc) additional blood samples will be obtained at onset and resolution.

Treatment:

Biological: Cellular therapy product