SALT: Alternative Donor Bone Marrow and Cord Blood Transplantation for High Risk Sickle Cell Disease
We hope to gain valuable information about the safety, success of engraftment, and rates of complications using alternate donor transplantation for children with severe SCD. Crucial information will be also collected about late effects from alternate donor BMT sickle cell, providing valuable information to clinicians and families making decisions among interventions for children with severe sickle cell disease. If successful, alternate donor transplantation in this setting could pave the way to offering curative treatment to many more patients with severe SCD.
Unfortunately, less than 1/4th of patients with severe SCD will have a matched sibling donor that can serve as a BMT donor. This research protocol proposes to study the safety and usefulness of "alternate donor transplant" (using donors other than matched siblings). We will offer this treatment to children with severe sickle cell disease that do not have a matched sibling BMT donor. Alternative donors can be family members who are slightly less than completely matched, unrelated volunteer donors who are completely matched, and donated banked umbilical cord blood that is completely or nearly completely matched.
Alternative donor transplant has been performed commonly in patients with cancer, and also provides curative therapy for several non-malignant diseases (severe immunodeficiency, marrow failure and metabolic storage diseases). Alternate donor transplants carry higher risks of complications, including graft-versus-host disease, infection, and graft failure. Therefore, we will be selective about which patients are invited to participate, limiting eligibility to those patients that have had a severe SCD related problem (rather than those who are doing well and are likely to have few SCD related problems), but excluding patients who have such severe organ damage that they are more likely to die during transplant, and limiting eligibility to a young age group. A multi-step review algorithm that includes internal, local and external expert review has been constructed to provide a thorough, safe and ethical accrual process. We will treat patients using drugs and methods commonly used in alternate donor transplant for other diseases such as leukemia, and incorporate lessons learned from our previous experience in BMT for sickle cell by modifying supportive care measures. Special attention will be given to evaluation of post-BMT effects in this population, as well as potential reasons for adverse effects (such as graft failure).
We think that Atlanta is a particularly good place to study this kind of transplant for several reasons. One reason is experience: our program has transplanted more children with SCD than any other single institution in North America, with excellent outcomes. Additionally, SCD patients in our area often have been treated on a special red cell transfusion program that limits the number of people donating the blood; we think this is likely to reduce the chance of graft failure.
Control: Active Control, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Sickle Cell Disease
Alternative donor bone marrow and cord blood
Children's Healthcare of Altanta
Results (where available)
- Source: http://clinicaltrials.gov/show/NCT00257543
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
Hematopoietic Stem Cell Transplantation
Transfer of HEMATOPOIETIC STEM CELLS from BONE MARROW or BLOOD between individuals within the same species (TRANSPLANTATION, HOMOLOGOUS) or transfer within the same individual (TRANSPLANTATION, AUTOLOGOUS). Hematopoietic stem cell transplantation has been used as an alternative to BONE MARROW TRANSPLANTATION in the treatment of a variety of neoplasms.
Peripheral Blood Stem Cell Transplantation
Transplantation of stem cells collected from the peripheral blood. It is a less invasive alternative to direct marrow harvesting of hematopoietic stem cells. Enrichment of stem cells in peripheral blood can be achieved by inducing mobilization of stem cells from the BONE MARROW.
Exchange Transfusion, Whole Blood
Repetitive withdrawal of small amounts of blood and replacement with donor blood until a large proportion of the blood volume has been exchanged. Used in treatment of fetal erythroblastosis, hepatic coma, sickle cell anemia, disseminated intravascular coagulation, septicemia, burns, thrombotic thrombopenic purpura, and fulminant malaria.
The soft tissue filling the cavities of bones. Bone marrow exists in two types, yellow and red. Yellow marrow is found in the large cavities of large bones and consists mostly of fat cells and a few primitive blood cells. Red marrow is a hematopoietic tissue and is the site of production of erythrocytes and granular leukocytes. Bone marrow is made up of a framework of connective tissue containing branching fibers with the frame being filled with marrow cells.
An abnormal hemoglobin resulting from the substitution of valine for glutamic acid at position 6 of the beta chain of the globin moiety. The heterozygous state results in sickle cell trait, the homozygous in sickle cell anemia.
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