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Journals The FASEB Journal June 2009

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Alternative splicing of the murine receptor for advanced glycation end-products (RAGE) gene

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The alternative splicing of pre-mRNAs is a critical mechanism in genomic complexity, disease, and development. Studies of the receptor for advanced glycation end-products (RAGE) indicate that this gene undergoes a variety of splice events in humans. However, no studies have extensively analyzed the tissue distribution in other species or compared evolutionary differences of RAGE isoforms. Because the majority of studies probing RAGE function have been performed in murine models, we therefore performed studies to identify and characterize the splice variants of the murine RAGE gene, and we compared these to human isoforms. Here, using mouse tissues, we identified numerous splice variants including changes in the extracellular domain or the removal of the transmembrane and cytoplasmic domains, which produce soluble splice isoforms. Comparison of splice variants between humans and mice revealed homologous regions in the RAGE gene that undergo splicing as well as key species-specific mechanisms of splicing. Further analysis of tissue splice variant distribution in mice revealed major differences between lung, kidney, heart, and brain. To probe the potential impact of disease-like pathological states, we studied diabetic mice and report that RAGE splice variation changed dramatically, resulting in an increase in production of soluble RAGE (sRAGE) splice variants, which were not associated with detectable levels of sRAGE in murine plasma. In conclusion, we have determined that the murine RAGE gene undergoes extensive splicing with distinct splice isoforms being uniquely distributed in different tissues. These differences in RAGE splicing in both physiological and pathogenic states further expand our understanding of the biological repertoire of this receptor in health and disease.—Kalea, A. Z., Reiniger, N., Yang, H., Arriero, M., Schmidt, A. M., Hudson, B. I. Alternative splicing of the murine receptor for advanced glycation end-products (RAGE) gene.

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Article Details
Kalea, Anastasia Z.; Reiniger, Nina; Yang, Hojin; Arriero, Maria; Schmidt, Ann Marie; Hudson, Barry I.
The FASEB Journal , Volume 23 (6): 1766
Fed of American Socs for Experimental Biology – Jun 1, 2009
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