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Gene therapy for platelet disorders: studies with Glanzmann s thrombasthenia Wilcox DA; White GC 2ndJ Thromb Haemost 2003[Nov]; 1 (11): 2300-11Current research aimed at correcting platelet defects are designed to further our knowledge in the use of hematopoietic stem cells for gene therapies of hemorrhagic disorders. Information gained from these studies may be directly applicable to treatment of disorders affecting platelets (e.g. Glanzmann's thrombasthenia, Bernard Soulier syndrome, gray platelet syndrome, and von Willebrand disease) as well as other disorders affecting distinct hematopoietic cell lineages. This work specifically addresses three questions: (i) can bone marrow stem cells be given sufficient genetic information to induce abnormal megakaryocytes to synthesize transgene products that help newly formed platelets to participate in normal hemostasis? (ii) can the newly synthesized receptor be maintained as a platelet-specific protein at therapeutic levels for a reasonable period of time? and (iii) will newly expressed proteins be tolerated by the immune system or become a target for B- and T-cell mediated immunity resulting in the premature destruction and clearing of the genetically altered megakaryocytes and platelets? Answers to these questions should indicate the feasibility of targeting platelets with genetic therapies that will in turn enable better management of patients with inherited bleeding disorders. The long-range benefit of this research will be an improved understanding of the regulation of protein expression during normal megakaryocytopoiesis, and the accumulation of additional scientific knowledge about normal platelet function and the way in which platelets and other cells recognize and interact with each other.|Animals[MESH]|Blood Platelet Disorders/*therapy[MESH]|Genetic Therapy/*methods[MESH]|Hematopoietic Stem Cell Transplantation[MESH]|Hematopoietic Stem Cells/metabolism[MESH]|Humans[MESH]|Immune Tolerance[MESH]|Megakaryocytes/metabolism/pathology[MESH]|Platelet Glycoprotein GPIIb-IIIa Complex/*administration & dosage/genetics[MESH]|Thrombasthenia/*therapy[MESH] |
