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. 1993 Apr 15;90(8):3177–3181. doi: 10.1073/pnas.90.8.3177

Lethal thalassemia after insertional disruption of the mouse major adult beta-globin gene.

W R Shehee 1, P Oliver 1, O Smithies 1
PMCID: PMC46262  PMID: 8475058

Abstract

Thalassemias are hereditary anemias caused by mutations that disturb the normal 1:1 balance of alpha- and beta-globin chains that form hemoglobin. We have disrupted the major adult beta-globin gene (b1) in mouse embryonic stem cells by using homologous recombination to insert selectable sequences into the gene. Mice homozygous for this insertional disruption of the b1 gene (Hbbth-2/Hbbth-2) are severely anemic and die perinatally. In contrast, approximately 60% of mice homozygous for deletion of the same gene (Hbbth-1/Hbbth-1) survive to adulthood and are much less anemic [Skow, L. C., Burkhart, B. A., Johnson, F. M., Popp, R. A., Goldberg, S. Z., Anderson, W. F., Barnett, L. B. & Lewis, S. E. (1983) Cell 34, 1043-1052]. These different phenotypes have implications for the control of beta-globin gene expression.

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Selected References

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