ArticleMammalian genome : official journal of the International Mammalian Genome Society2005
A 191-kb genomic fragment containing the human alpha-globin locus can rescue alpha-thalassemic mice.
Article in Mammalian genome : official journal of the International Mammalian Genome Society, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 7 citations in OpenAlex.
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- Computational tools for comparative phenomics: the role and promise of ontologies.Mammalian genome : official journal of the International Mammalian Genome Society · 2012Review
- New approaches to the representation and analysis of phenotype knowledge in human diseases and their animal models.Briefings in functional genomics · 2011Review
- Long human CHGA flanking chromosome 14 sequence required for optimal BAC transgenic "rescue" of disease phenotypes in the mouse Chga knockout.Physiological genomics · 2010Article
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7 authors at 3 institutions in 2 countries.
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Abstract
A 191-kb human bacterial artificial chromosome (BAC) containing the human alpha-globin genomic locus was used to generate transgenic mice that express, exclusively, human alpha-globin ((hu)alpha-globin). Expression of (hu)alpha-globin reaches a level of 36% of that of endogenous mouse alpha-globin ((mu)alpha-globin) on a heterozygous mouse alpha-thalassemia background ((mu)alpha-globin knockout, (mu)alpha(+/-)). Hemizygous transgenic mice carrying the (hu)alpha-globin locus on a heterozygous knockout background ((hu)alpha(+/0), (mu)alpha(++/--)) demonstrated complementation of most hematologic parameters. By crossing (hu)alpha(+/0), (mu)alpha(++/--) mice, we were able to generate mice entirely dependent on (hu)alpha-globin synthesis. Breeding and fluorescent in situ hybridization studies demonstrate that only mice homozygous for the transgene were able to rescue embryonic lethal homozygous (mu)alpha-globin knockout embryos ((mu)alpha(--/--)). Adult rescued mice produce hemoglobin at levels similar to wild-type mice, with partial red cell complementation based on mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), and red cell distribution width (RDW) measurements. Significant erythrocythemia above wild-type levels seems to be the main compensatory mechanism for the normalization of the hemoglobin levels in the rescued animals. Our studies demonstrate that the (hu)alpha-globin locus in the 191-kb transgene contains all the necessary elements for the regulated expression of (hu)alpha-globin in transgenic mice. This animal model should be valuable for studying the mechanisms regulating (hu)alpha-globin production and for development of therapeutic strategies for beta-thalassemia based on downregulation of alpha-globin expression.
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