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• W2072692007 abstract "Abstract Patients affected by β-thalassemia major require lifelong transfusions because of insufficient or absent production of the β chain of hemoglobin (Hb). A minority of patients are cured by allogeneic bone marrow transplantation. In the most severe of the hitherto available mouse models of β-thalassemia, a model for human β-thalassemia intermedia, we previously demonstrated that globin gene transfer in bone marrow cells is curative, stably raising Hb levels from 8.0-8.5 to 11.0-12.0 g/dL in long-term chimeras. To fully assess the therapeutic potential of gene therapy in the context of a lethal anemia, we now have created an adult model of β0-thalassemia major. In this novel model, mice engrafted with β-globin–null (Hbbth3/th3) fetal liver cells succumb to ineffective erythropoiesis within 60 days. These mice rapidly develop severe anemia (2-4 g/dL), massive splenomegaly, extramedullary hematopoiesis (EMH), and hepatic iron overload. Remarkably, most mice (11 of 13) treated by lentivirus-mediated globin gene transfer were rescued. Long-term chimeras with an average 1.0-2.4 copies of the TNS9 vector in their hematopoietic and blood cells stably produced up to 12 g/dL chimeric Hb consisting of muα2:huβ2tetramers. Pathologic analyses indicated that erythroid maturation was restored, while EMH and iron overload dramatically decreased. Thus, we have established an adult animal model for the most severe of the hemoglobinopathies, Cooley anemia, which should prove useful to investigate both genetic and pharmacologic treatments. Our findings demonstrate the remarkable efficacy of lentivirus-mediated globin gene transfer in treating a fulminant blood disorder and strongly support the efficacy of gene therapy in the severe hemoglobinopathies." @default.
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• W2072692007 date "2003-04-15" @default.
• W2072692007 modified "2023-10-17" @default.
• W2072692007 title "A novel murine model of Cooley anemia and its rescue by lentiviral-mediated human β-globin gene transfer" @default.
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• W2072692007 doi "https://doi.org/10.1182/blood-2002-10-3305" @default.
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