Defects of insulin's signal transduction in old rat livers.

  title={Defects of insulin's signal transduction in old rat livers.},
  author={O Nadiv and Oren S. Cohen and Yehiel Zick},
  volume={130 3},
Aging is associated with a postbinding defect in insulin action, leading to increased glucose intolerance and occasional diabetes. To determine whether defects in insulin receptor kinase (IRK) activity or in the phosphorylation of its physiological substrates underlie this age-related phenomenon, young (2-3 months old) and old (24-27 months old) Wistar rats were studied. When assayed in vitro, the hepatic IRK activities of noninjected old and young rats were comparable. Thirty seconds after the… CONTINUE READING