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.
|Number of pages||7|
|Publication status||Published - 1 Mar 2000|