Fetal expression of a human Aγ globin transgene rescues globin chain imbalance but not hemolysis in EKLF null mouse embryos

A. C. Perkins, K. R. Peterson, G. Stamatoyannopoulos, H. E. Witkowska, Stuart H. Orkin

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Mice lacking the erythroid Kruppel-like factor (EKLF) die in utero at embryonic day 15 (E15) from severe anemia. EKLF-/embryos display a marked deficit in β-globin gene expression. To test whether β-globin deficiency was solely responsible for the anemia and intrauterine death, we corrected the globin chain imbalance in EKLF(-/-) embryos by breeding with a strain of mice that express high levels of human γ-globin. Despite efficient production of hybrid mα2-hγ2 hemoglobin in the fetal livers of EKLF(-/-) animals, hemolysis was not corrected and survival was not prolonged. We concluded that deficiency of nonglobin EKLF target genes is a major contributor to the definitive red blood cell abnormalities and prenatal death in EKLF(-/-) embryos. These results suggest that strategies designed to antagonize EKLF function in adults with hemoglobinopathy. In an attempt to reactivate γ-globin gene expression, may adversely affect other essential aspects of red blood cell physiology. (C) 2000 by The American Society of Hematology.

Original languageEnglish
Pages (from-to)1827-1833
Number of pages7
Issue number5
Publication statusPublished - 1 Mar 2000
Externally publishedYes

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