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T Cell Depleted Allogeneic Hematopoietic Stem Cell Transplantation Conditioned With a Reduced Intensity Regimen in Patients With Hematologic Malignancies and Aplastic Anemia

Allogeneic Hematopoietic Stem Cell Transplantation of α/β T-Lymphocyte Depleted Graft Conditioned With a Reduced Intensity Regimen in Patients With Hematologic Malignancies and Aplastic Anemia

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03531736
Enrollment
17
Registered
2018-05-22
Start date
2018-05-09
Completion date
2027-05-01
Last updated
2026-07-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Myeloid Diseases

Keywords

Allogeneic Hematopoietic Stem Cell Transplantation, intensity conditioning regimen, 17-639

Brief summary

The main purpose of this study is to learn if a new combination of chemotherapy, in combination with low-dose radiation, will be safe for the patient, and at the same time provide the best opportunity to cure the bone marrow cancer. The combination of chemotherapy and radiation described in the study is considered 'low intensity.' Although the chemotherapy agents used in this study and for transplant are FDA approved, the chemotherapy treatment and conditioning regimens or combinations listed in this consent are not yet FDA approved. The CliniMACS device is FDA approved for one type of T cell depletion (positive selection of the stem cells) but not approved yet for other type of T cell depletion, which is being studied on this protocol. This pilot study, along with other studies will serve as the basis for FDA approval, if outcomes are favorable.

Interventions

ATG (2 mg/kg/d IV on days-8 through -7)

DRUGfludarabine

fludarabine (30 mg/m2/d on days -5 through -2)

RADIATIONtotal body irradiation

TBI 200 cGy (days -2 and -1) given post stem cell infusion

DRUGcyclophosphamide

cyclophosphamide given post stem cell infusion (50 mg/kg on days +3 and +4)

DRUGRituxan

Rituxan (200 mg/m2) will be given to reduce the risk of EBV viremia

PROCEDUREAllogeneic Hematopoietic Stem Cell Transplantation

Allogeneic Hematopoietic Stem Cell Transplantation

Sponsors

Memorial Sloan Kettering Cancer Center
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

This is a pilot study to assess engraftment of a T cell depleted (TCD) graft following a reduced intensity conditioning regimen (RIC). The conditioning regimen will include total body irradiation (TBI), Fludarabine, anti-thymocyte globulin (ATG) and post transplant cyclophosphamide (PT-Cy). The graft will be TCD and will be composed of a TCR-α/β+ lymphocyte depletion stem cells and CD34+ selected stem cells.

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Patients with one of the high risk myeloid diseases as outlined below. Patients must have ≤ 5% blasts on the last BM evaluation prior to starting the conditioning regimen. Diseases included on this protocol include: 1. Acute Myeloid Leukemia (AML) in CR1 with intermediate or high risk features as defined below: °Cytogenetic abnormalities which are not considered "good risk" cytogenetic features (i.e t(8:21), t(15:17), inv 16 without c-kit mutations. And/or * Therapy related AML with history of antineoplastic therapy (radiation and/or chemotherapy) And/or * Normal karyotype with mutations of FLT3, RUNX1, TP53 mutation, ASXL1 or any others that are considered to be high risk 2. AML in ≥ 2nd remission 3. Myelodysplastic syndrome, myeloproliferative neoplasms, or MDS/MPN overlap syndrome with: °International prognostic scoring system risk score INT-2 or high risk at the time of transplant evaluation. And/or * Any risk category if life-threatening cytopenia exists And/or * Karyotype or genomic changes that indicate high risk for progression to acute myelogenous leukemia, including abnormalities of chromosome 7 or 3, mutations of TP53, or complex or monosomal karyotype. 4. Chronic myelomonocytic leukemia (CMML) 5. Chronic myeloid leukemia (CML) with the following features: °Patients who have failed or are intolerant to BCR-ABL tyrosine kinase inhibitors. And/or °CML with BCR-ABL mutation consistent with poor response to tyrosine kinase inhibition (e.g T351l mutation) 6. Patients with severe aplastic anemia * Chronic lymphocytic leukemia (CLL) with high risk disease as defined by the EBMT consensus criteria. * Non-Hodgkin lymphoma meeting both of the following criteria: * Responding to therapy prior to enrollment. * Relapse after prior autologous bone marrow transplant or are ineligible for autologous bone marrow transplant. * Multiple Myeloma with disease in the following categories: * Patients with relapsed multiple myeloma following autologous stem cell transplantation who have achieved at least partial response following additional chemotherapy * Patients with high risk cytogenetics at diagnosis must have achieved at least a partial response following autologous stem cell transplantation. Patients must have complex karyotype, del17p, t4;14, and/or t14;16 by FISH and/or del13 by karyotyping. * Each patient must be willing to participate as a research participant and must sign an informed consent form. * Organ Function and Performance Status Criteria: 1. Patients be ≥ 18 years old. 2. Patients must have a Karnofsky (adult) or Performance Status ≥ 70%. 3. Patients must have adequate organ function measured by: * Cardiac: asymptomatic or if symptomatic, then LVEF at rest must be ≥ 40% and must improve with exercise. * Hepatic: \< 5x ULN ALT and \< 2x ULN total serum bilirubin, unless there is congenital benign hyperbilirubinemia. * Renal: CrCl \>30ml/min (measured or calculated/estimated). * Pulmonary: asymptomatic or if symptomatic, DLCO \> 50% of predicted (corrected for hemoglobin)

Exclusion criteria

* Prior allogenic hematopoietic stem cell transplantation * Prior radiation therapy with 400cGY or more of TBI * BM with increased fibrosis (Reticulin stain \> 1/3) * Active and uncontrolled infection at time of transplantation * HIV infection * Seropositivity for HTLV-1 * Inadequate performance status/ organ function * Pregnancy or breast feeding * Patient or guardian unable to give informed consent or unable to comply with the treatment protocol including appropriate supportive care, follow-up, and research tests. Donor Inclusion and

Design outcomes

Primary

MeasureTime frameDescription
Rate of donor Neutrophil Engraftment30 days post-transplantNeutrophil engraftment (recovery of ANC) defined by an ANC ≥ 500/mm\^3 for 3 consecutive days

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORRoni Tamari, MD

Memorial Sloan Kettering Cancer Center

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 25, 2026