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The main purpose of this project is to cure patients with high risk Sickle cell disease and other red cell disorders including thalassemia and diamond-blackfan anemia by bone marrow transplantation. The patients enrolled in this study will be those who lack matched sibling donors and therefore have no other option but to undergo bone marrow transplantation using matched but unrelated bone marrow or umbilical cord blood from the national marrow donor program registry. Since bone marrow transplantation for these disorders using matched unrelated donors has two major problems i.e. engraftment, or , the process of new marrow being accepted and allowed to grow in the the patient; and graft-versus-host disease, or the process where the new marrow "rejects" the host or the patient, this study has been devised with methods to overcome these two problems and thus make transplantation from unrelated donors both successful in terms of engraftment and safe in terms of side effects, both acute and long term.
In order to accomplish these two goals, two important things will be done. Firstly, patients will get three medicines which are considered reduced intensity because they are not known to cause the serious organ damage seen with conventional chemotherapy. These medicines, however, do cause intense immune suppression so these can cause increased infections. Secondly, in addition to transplantation of bone marrow from unrelated donors, patients will also transplanted with mesenchymal stromal cells derived from the bone marrow of their parents. Mesenchymal stromal cells are adult stem cells that are normally found in the bone marrow and are thought to create the right background for the blood cells to grow. They have been shown in many animal and human studies to improve engraftment. In addition, they have a special property by which they prevent and are now even considered to treat graft versus host disease. Therefore, by using a reduced intensity chemotherapy regimen before transplant and transplanting mesenchymal stromal cells, we hope to improve engraftment while at the same time decrease the potential for severe side effects associated with a conventional transplant which uses extremely high doses of chemotherapy.
Allocation: Non-Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Sickle Cell Disease
Bone marrow transplantation
Children's Hospital of Alabama
Children's Health System, Alabama
Published on BioPortfolio: 2014-07-23T21:13:39-0400
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The transference of BONE MARROW from one human or animal to another for a variety of purposes including HEMATOPOIETIC STEM CELL TRANSPLANTATION or MESENCHYMAL 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.
Agents that destroy bone marrow activity. They are used to prepare patients for BONE MARROW TRANSPLANTATION or STEM CELL TRANSPLANTATION.
Techniques for the removal of subpopulations of cells (usually residual tumor cells) from the bone marrow ex vivo before it is infused. The purging is achieved by a variety of agents including pharmacologic agents, biophysical agents (laser photoirradiation or radioisotopes) and immunologic agents. Bone marrow purging is used in both autologous and allogeneic BONE MARROW TRANSPLANTATION.
Immunosuppression by reduction of circulating lymphocytes or by T-cell depletion of bone marrow. The former may be accomplished in vivo by thoracic duct drainage or administration of antilymphocyte serum. The latter is performed ex vivo on bone marrow before its transplantation.
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