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Abstract Title:

Resveratrol improves insulin resistance hyperglycemia and hepatosteatosis but not hypertriglyceridemia, inflammation, and life span in a mouse model for Werner syndrome.

Abstract Source:

J Gerontol A Biol Sci Med Sci. 2011 Mar;66(3):264-78. Epub 2010 Oct 25. PMID: 20974729

Abstract Author(s):

Adam Labbé, Chantal Garand, Victoria C Cogger, Eric R Paquet, Myriam Desbiens, David G Le Couteur, Michel Lebel

Article Affiliation:

Centre de Recherche en Cancérologie de l'Université Laval, Hôpital Hôtel-Dieu de Québec, 9 McMahon St, Québec, Québec G1R 2J6, Canada. michel.lebel@crhdq.ulaval.ca.

Abstract:

Werner syndrome is a premature aging disorder caused by mutations in a RecQ-like DNA helicase. Mice lacking the helicase domain of the WRN homologue exhibit many features of Werner syndrome, including a pro-oxidant status and a shorter mean life span. Here, we show that resveratrol supplementation improved the hyperglycemia and the insulin resistance phenotype in these Wrn mutant mice. In addition, resveratrol reversed liver steatosis, lipid peroxidaton, and the defenestration phenotypes observed in such mice. Resveratrol, however, did not improve the hypertriglyceridemia, inflammatory stress, nor extend the mean life span of these mutant mice. Microarray and biologic pathway enrichment analyses on liver tissues revealed that resveratrol mainly decreased lipidogenesis and increased genes involved in the insulin signaling pathway and the glutathione metabolism in Wrn mutant mice. Finally, resveratrol-treated mutant mice exhibited an increase in the frequency of lymphoma and of several solid tumors. These results indicate that resveratrol supplementation might exert at least metabolic benefits for Werner syndrome patients.

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