This phase I/II trial studies the side effects and best dose of conventional T cells and regulatory T cells and to see how well they work in treating patients with hematologic malignancies that have spread to other places in the body (advanced) and are undergoing T cell-depleted donor stem cell transplant. Giving chemotherapy and total body irradiation before a donor stem cell transplant helps stop the growth of cancer cells. It may also stop the patient's immune system from rejecting the donor's stem cells. When the healthy stem cells from a donor are infused into the patient they may help the patient's bone marrow make stem cells, red blood cells, white blood cells, and platelets. Sometimes the transplanted cells from a donor can make an immune response against the body's normal cells. Removing the T cells from the donor cells before transplant may stop this from happening. Giving an infusion of the donor's T cells (donor lymphocyte infusion) later may help the patient's immune system see any remaining cancer cells as not belonging in the patient's body and destroy them (called graft-versus-tumor effect).
Study sponsor and potential other locations can be found on ClinicalTrials.gov for NCT01660607.
PRIMARY OBJECTIVES:
I. To determine the efficacy, safety, and feasibility of administration of several dose combinations of conventional T cells (Tcon) and regulatory T cells (Treg) in subjects undergoing allogeneic hematopoietic cell transplantation (HCT) with HLA matched donors (related or unrelated), using a T cell depleted graft (CD34+ hematopoietic progenitor cells [“CD34+ HSPC”]), without immunosuppression.
II. To determine the maximum tolerated dose of infused Treg and Tcon cells with myeloablative allogeneic HCT using matching donors.
III. Determine if concomitant single agent immunosuppression is needed with fresh Treg cells (phase 2 stage 1).
IV. To determine 1 year graft-versus-host disease (GvHD) free relapse free survival (GRFS) post HCT (phase 2 stage 2).
SECONDARY OBJECTIVES:
I. To determine the 1-year overall survival in patients undergoing allogeneic hematopoietic cell transplantation with matched related donors.
II. To measure the incidence and severity chronic GvHD.
III. To measure incidence of serious infections.
EXPLORATORY OBJECTIVE:
I. To measure immune reconstitution parameters.
OUTLINE: This is a phase I, dose-escalation study of Treg and Tcon followed by a phase II study. Patients with acute leukemia, chronic myelogenous leukemia (high risk), myelodysplastic syndrome, or myeloproliferative disorder are assigned to Regimen I or II and patients with non-Hodgkin lymphoma are assigned to Regimen III.
REGIMEN I: Patients undergo fractionated total-body irradiation (fTBI) on days -8 to -5. Patients also receive etoposide intravenously (IV) on day -4 and cyclophosphamide IV on day -2. Patients then undergo allogeneic CD34+ T-cell depleted HCT on day 0 and infusion of Treg on day 0 and Tcon on day 2.
REGIMEN II: Patients receive busulfan IV every 6 hours on days -7 to -4 and cyclophosphamide IV on days -3 to -2. Patients then undergo allogeneic CD34+ T-cell depleted HCT and infusion of Treg and Tcon as in Regimen I.
REGIMEN III: Patients receive carmustine IV on day -6, etoposide IV on day -4, and cyclophosphamide IV on day -2. Patients then undergo allogeneic CD34+ T-cell depleted HCT infusion of Treg and Tcon as in Regimen I.
GRAFT-VERSUS-HOST DISEASE (GVHD) PROPHYLAXIS: Patients receiving treatment in Regimens I and III receive sirolimus beginning on day 3; patients receiving treatment in Regimen II receive tacrolimus beginning on day 3.
After completion of study treatment, patients are followed up at 30, 60, 90, 100, 180, and 365 days, and then yearly for 5 years.
Lead OrganizationStanford Cancer Institute Palo Alto
Principal InvestigatorEverett Meyer