HLA-HAPLOIDENTICAL FAMILIAL DONOR HEMATOPOIETIC CELL TRANSPLANTATION AFTER REDUCED INTENSITY CONDITIONING OF BUSULFAN, FLUDARABINE, AND ANTI-THYMOCYTE GLOBULIN FOR ADULT PATIENTS WITH HEMATOLOGIC MALIGNANCIES AND MYELODYSPLASTIC SYNDROME - A PHASE 2 STUDY

OBJECTIVES:

• To evaluate the efficacy of HLA-haploidentical familial donor hematopoietic cell transplantation with a reduced-intensity conditioning regimen of busulfan, fludarabine phosphate, and anti-thymocyte globulin in patients with hematologic malignancies or myelodysplastic syndromes.

OUTLINE: Before receiving the reduced-intensity conditioning regimen, patients receive one dose of intrathecal (IT) methotrexate, then leucovorin calcium IV or orally 4 hours after methotrexate and every 6 hours for a total of 8 doses.

• Reduced-intensity conditioning regimen: Patients receive busulfan IV over 6 hours on days -7 and -6, fludarabine phosphate IV over 30 minutes on days -7 to -2, anti-thymocyte globulin (ATG) IV over 4 hours on days -4 to -1, and methylprednisolone IV over 30 minutes on days -4 to -1.
• HLA-haploidentical familial donor hematopoietic stem cell transplantation (HSCT): Patients undergo allogeneic HSCT over 1 hour on days 0 and 1.
• Graft-versus-host disease (GVHD) prophylaxis: Patients receive cyclosporine IV* over 2-4 hours every 12 hours on days -1 to 30 followed by a taper until day 60 and methotrexate IV on days 2, 4 , 7, and 12.

NOTE: *Cyclosporine can be given orally once oral medication can be tolerated