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Accession IconGSE49566

Analyses of a deactivation genetic variation in Ha-Ras proto oncogene identified in a patient wit premature aging and insulin resistance

Organism Icon Homo sapiens
Sample Icon 9 Downloadable Samples
Technology Badge Icon Affymetrix Human Genome U95 Version 2 Array (hgu95av2)

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Inherited genetic variants of insulin receptor induced cellular signaling have long been suspected to contribute to the development of type-2- diabetes mellitus. In this report we discuss a heterozygous mutation in the first coding exon of the proto-oncogene Ha-Ras (Ha-RasA11P) that we have identified in a patient with familial premature aging syndrome. The patient has atopic sklerodermic skin alterations, insulin resistance as well as disturbances in lipid metabolism. In vitro analyzes have shown that this mutation disrupted not only the signal transduction of the insulin receptor but also other receptor tyrosine kinases, such as IGF-1, EGF, PDGF. These results demonstrate that HA-Ras has a significant role in insulin sensitivity in humans.
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