Non-Myeloablative Bone Marrow Transplant for Patients With Sickle Cell Anemia and Other Blood Disorders
Sickle Cell Disease
About this trial
This is an interventional treatment trial for Sickle Cell Disease focused on measuring sickle cell disease
Eligibility Criteria
DISEASE CHARACTERISTICS:
Diagnosis of 1 of the following sickle cell anemias (Hb SS):
- Hb S/β° thalassemia
- Hb S/β+ thalassemia
- Hb SC disease
- Hb SE disease
- Hb SD disease
- Hemoglobin SO-Arab disease
- Hb S/hereditary persistence of fetal hemoglobin
Meets 1 of the following criteria:
- History of invasive pneumococcal disease
- Stroke or CNS event lasting > 24 hours
- MRI changes indicative of brain parenchymal damage
- Evidence of cerebrovascular disease by magnetic resonance angiography
- Acute chest syndrome requiring exchange transfusion or hospitalization
- Recurrent vaso-occlusive pain crisis (> 2 per year for the last 2 years)
- Stage I or II sickle lung disease
- Sickle retinopathy
- Osteonecrosis
- Red cell alloimmunization (> 2 antibodies) during long-term transfusion
- Constellation of dactylitis in the first year of life AND a baseline hemoglobin < 7 g/dL and leukocytosis (WBC > 13.4/mm^3) in the absence of infection during the second year of life
- Pitted RBC count > 3.5% during the first year of life
- Ineligible for or refused bone marrow transplantation from an HLA-matched sibling donor
Partially mismatched (at least haploidentical) first-degree relative donor available
- No minor (donor anti-recipient) ABO incompatibility if an ABO compatible donor is available
PATIENT CHARACTERISTICS:
- ECOG performance status (PS) 0-1 OR Karnofsky or Lansky PS 70-100%
- LVEF ≥ 35%
- FEV_1 and forced vital capacity ≥ 40% predicted
- Direct bilirubin < 3.1 mg/dL
- No moderate to severe pulmonary hypertension by ECHO
- No debilitating medical or psychiatric illness that would preclude study participation
- No HIV positivity
- Not pregnant or nursing
- Negative pregnancy test
- Fertile patients must use effective contraception
PRIOR CONCURRENT THERAPY:
- No prior transfusions from donor
- No immunosuppressive agents, including steroids as antiemetics, within 24 hours after the last dose of post-transplantation cyclophosphamide
Sites / Locations
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Arms of the Study
Arm 1
Arm 2
Experimental
Experimental
Transplant - 200 cGy
Transplant - 400 cGy
Conditioning regimen with anti-thymocyte globulin, fludarabine, cyclophosphamide, and total body irradiation - 200. Seizure prophylaxis with levetiracetam. Allogeneic bone marrow transplant infusion on Day 0. Graft-vs-host-disease (GVHD) prophylaxis with cyclophosphamide, mycophenolate mofetil, and sirolimus.
Conditioning regimen with anti-thymocyte globulin, fludarabine, cyclophosphamide, and total body irradiation - 400. Seizure prophylaxis with levetiracetam. Allogeneic bone marrow transplant infusion on Day 0. Graft-vs-host-disease (GVHD) prophylaxis with cyclophosphamide, mycophenolate mofetil, and sirolimus.