Abstract
Insulin resistance in Werner's syndrome (WS) was studied using the glucose clamp technique, and compared with physiologically aged and young subjects. Fasting immuno-reactive insulin (IRI) was increased in patients with Werner's syndrome compared with aged and young subjects. Metabolic clearance rate (MCR) of glucose was decreased in the aged and WS. A rightward shift of the dose-response curves of insulin and MCR of glucose was observed in the aged and WS with a more pronounced shift in the latter. MCR of insulin was also decreased in WS. [ 125I]insulin binding to erythrocytes was similar in the three groups. These results suggest that insulin resistance associated with WS is due to a post-binding defect manifested by a rightward shift of the dose-response curve of insulin-induced glucose disposal and a decrease in insulin clearance rate.
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