The yellow agouti mutation alters some but not all responses to diet and exercise

Obesity Research
Sally ChiuCraig H Warden

Abstract

Effects of ectopic expression of the agouti signaling protein were studied on responses to diet restriction and exercise in C57BL/6J (B6) mice and obese B6 mice congenic for the yellow agouti mutation [B6.Cg-Ay (Ay)]. Adult male Ay mice were either kept sedentary or exercised on a running wheel and fed ad libitum or diet restricted until weight matched to ad libitum-fed B6 control mice. Body composition, plasma lipids, leptin, and adiponectin were measured. mRNA levels for leptin, adiponectin, lipoprotein lipase, and pyruvate dehydrogenase kinase 4 were measured in a visceral (epididymal) and a subcutaneous (femoral) fat depot by real-time polymerase chain reaction. Correlations among traits exhibited one of three patterns: similar lines for B6 and Ay mice, different slopes for B6 and Ay mice, and/or different intercepts for B6 and Ay mice. Correlations involving plasma leptin, mesenteric and epididymal adipose weights, or low-density lipoprotein-cholesterol were most likely to have different slopes and/or intercepts in B6 and Ay mice. mRNA levels for leptin, Acrp30, pyruvate dehydrogenase kinase 4, and lipoprotein lipase in epididymal adipose tissue were not correlated with corresponding levels in femoral adipose tissue. The a...Continue Reading

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Citations

Feb 24, 2009·Nutrition and Cancer·Melissa J L BonordenMargot P Cleary
Oct 31, 2008·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Carrie Haskell-LuevanoZhimin Xiang
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