Sexual dimorphism of pancreatic beta-cell degeneration in transgenic mice expressing an insulin-ras hybrid gene.

Abstract excerpt

The human H-ras oncogene induces cell degeneration and diabetes when expressed in pancreatic beta-cells in transgenic mice. The disease develops predominantly in male mice between 5-8 months of age. Most transgenic female mice do not manifest this phenotype, even at much greater ages. However, ovariectomy induces female beta-cell degeneration similar to that in the males. In contrast, castration or the presence...

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