Dietary Capsaicin Attenuates Metabolic Dysregulation in Genetically Obese Diabetic Mice
Publication: Journal of Medicinal Food
Volume 14, Issue Number 3
Abstract
Metabolic dysregulation (e.g., hyperglycemia, hyperinsulinemia, hyperlipidemia, etc.) is a hallmark of obesity-related diseases such as insulin resistance, type 2 diabetes, and fatty liver disease. In this study, we assessed whether dietary capsaicin attenuated the metabolic dysregulation in genetically obese diabetic KKAy mice, which have severe diabetic phenotypes. Male KKAy mice fed a high-fat diet for 2 weeks received a 0.015% capsaicin supplement for a further 3 weeks and were compared with nonsupplemented controls. Dietary capsaicin markedly decreased fasting glucose/insulin and triglyceride levels in the plasma and/or liver, as well as expression of inflammatory adipocytokine genes (e.g., monocyte chemoattractant protein-1 and interleukin-6) and macrophage infiltration. At the same time expression of the adiponectin gene/protein and its receptor, AdipoR2, increased in adipose tissue and/or plasma, accompanied by increased activation of hepatic AMP-activated protein kinase, a marker of fatty acid oxidation. These findings suggest that dietary capsaicin reduces metabolic dysregulation in obese/diabetic KKAy mice by enhancing expression of adiponectin and its receptor. Capsaicin may be useful as a dietary factor for reducing obesity-related metabolic dysregulation.
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Copyright 2011, Mary Ann Liebert, Inc. and Korean Society of Food Science and Nutrition.
History
Published in print: March 2011
Published online: 20 February 2011
Accepted: 22 November 2010
Received: 2 September 2010
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No competing financial interests exist.
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