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Giving Chemotherapy for a Shortened Amount of Time Before a Stem Cell Transplantation

A Pilot Study of Condensed Busulfan, Melphalan, and Fludarabine Conditioning Prior to Ex-vivo CD34+ Selected Allogeneic Hematopoietic Cell Transplantation

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04098393
Enrollment
39
Registered
2019-09-23
Start date
2019-09-18
Completion date
2026-09-30
Last updated
2025-06-29

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

Conditions

Hematologic Malignancies

Keywords

Busulfan, Melphalan, Fludarabine, Allogeneic Hematopoietic Cell Transplantation, 19-245

Brief summary

The purpose of this study is to see if a condensed version of the chemotherapy regimen busulfan, melphalan, fludarabine (bu/mel/flu) and the drug antithymocyte globulin (ATG-also referred to as rATG or thymoglobulin) can have the same or fewer number of severe side effects in people with various blood cancers 30 days after they receive an allogeneic hematopoietic cell transplantation.

Interventions

DRUGBusulfan 3.2 mg/kg/day

Busulfan 3.2 mg/kg/day, with dose adjustments made according to pharmacokinetic (PK) levels.

DRUGFludarabine

Fludarabine (25mg/m2/ day) administered on days -6, -5, -4, -3, and -2.

DRUGMelphalan

Melphalan (70mg/m2/day) administered on days -6 and -5.

ATG will be given based on a dynamic nomogram based on the patient's absolute lymphocyte count at the start of conditioning and can result in 2 or 3 days of ATG administration.

DRUGBusulfan 0.8 mg/kg

Busulfan 0.8 mg/kg every 6 hours x 10 doses, with dose adjustments made according to PK levels.

PROCEDUREAllogeneic hematopoietic cell transplantation (Allo-HCT)

Allogeneic hematopoietic cell transplantation following the conditioning regimen.

Sponsors

Memorial Sloan Kettering Cancer Center
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

This is a pilot study in which adult patients with hematologic malignancies undergoing ex-vivo CD34-selected allo-HCT will receive a condensed version of our standard bu/mel/flu regimen, reducing the length of the conditioning regimen from 8 days to 5 days.

Eligibility

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

Inclusion criteria

* Patients aged ≥ 18 years old. * Patients with any of the following hematologic malignancies for which allo-HCT is indicated, including: * Acute myeloid leukemia (AML) with intermediate or high-risk features in CR1. * Relapsed AML in ≥ CR2. * Acute leukemias of ambiguous lineage in ≥ CR1. * Acute lymphoid leukemia (ALL) in CR1 with clinical, flow cytometric, or molecular features indicating a high risk for relapse, or ALL in ≥ CR2. * CML meeting one of the following criteria: * Failed response to or intolerant to BCR-ABL tyrosine kinase inhibitors (TKIs). * CML with BCR-ABL mutation consistent with poor response to TKIs (e.g., T315I mutation) * CML in accelerated phase or blast crisis with \<10% blasts after therapy, or in second chronic phase. * Myelodysplastic syndromes (MDS), myeloproliferative neoplasms (MPN), or MDS/MPN overlap syndromes with least one of the following: * Revised International Prognostic Scoring System risk score of intermediate or higher at the time of transplant evaluation. * Life-threatening cytopenias. * 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. * Therapy related disease or disease evolving from other malignant processes. * Chronic myelomonocytic leukemia (CMML-1 or CMML-2). * Severe aplastic anemia. * Relapsed Hodgkin lymphoma meeting both of the following criteria: * Responding to therapy prior to enrollment. * Relapse after autologous HCT or are ineligible for autologous HCT. * Relapsed non-Hodgkin lymphoma meeting both of the following criteria: * Responding to therapy prior to enrollment. * Relapse after prior autologous HCT or are ineligible for autologous HCT. * High-risk multiple myeloma following autologous HCT or relapsed multiple myeloma following autologous HCT with chemosensitive disease. * Adequate organ function is required, defined as follows: * Serum bilirubin ≤ 2 mg/dL, unless benign congenital hyperbilirubinemia. Patients with hyperbilirubinemia related to paroxysmal nocturnal hemoglobinuria or other hemolytic disorders are eligible with PI approval. * AST, ALT, and alkaline phosphatase \< 3 times the upper limit of normal unless thought to be disease-related. * Creatinine clearance ≥ 50 ml/min (calculated by Cockcroft Gault) * LVEF ≥ 45% by MUGA or resting echocardiogram. * Pulmonary function (FEV1 and corrected DLCO) ≥ 50% predicted. * Adequate performance status of ECOG ≤ 2. * Each patient must be willing to participate as a research subject and must sign an informed consent form.

Exclusion criteria

* Patients with active extramedullary disease. * Patients with active central nervous system malignancy. * Active and/or uncontrolled infection at the time of allo-HCT. * Patients who have undergone previous allo-HCT. * Patients who have undergone previous autologous HCT within the last 6 months, with the exclusion of high-risk multiple myeloma patients. * Patient seropositivity for HIV I/II and/or HTLV I/II. * Females who are pregnant or breastfeeding. * Patients unwilling to use contraception during the study period. * Patient or guardian unable to give informed consent or unable to comply with the treatment protocol. Donor Inclusion and

Design outcomes

Primary

MeasureTime frameDescription
the number of grade 4 toxicitiesin the first 30 days post-HCTAll grade 4 CTCAEv5.0 toxicities are included except for hematologic toxicities that are considered expected for patients receiving myeloablative conditioning.

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026