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Abstract Title:

Ginger extract prevents high-fat diet-induced obesity in mice via activation of the peroxisome proliferator-activated receptorδ pathway.

Abstract Source:

J Nutr Biochem. 2015 May 28. Epub 2015 May 28. PMID: 26101135

Abstract Author(s):

Koichi Misawa, Kojiro Hashizume, Masaki Yamamoto, Yoshihiko Minegishi, Tadashi Hase, Akira Shimotoyodome

Article Affiliation:

Koichi Misawa

Abstract:

The initiation of obesity entails an imbalance wherein energy intake exceeds expenditure. Obesity is increasing in prevalence and is now a worldwide health problem. Food-derived peroxisome proliferator-activated receptorδ (PPARδ) stimulators represent potential treatment options for obesity. Ginger (Zingiber officinale Roscoe) was previously shown to regulate the PPARγ signaling pathway in adipocytes. In this study, we investigated the antiobesity effects of ginger in vivo and the mechanism of action in vitro. Energy expenditure was increased, and diet-induced obesity was attenuated in C57BL/6J mice treated with dietary ginger extract (GE). GE also increased the number of Type I muscle fibers, improved running endurance capacity and upregulated PPARδ-targeted gene expression in skeletal muscle and the liver. 6-Shogaol and 6-gingerol acted as specific PPARδ ligands and stimulated PPARδ-dependent gene expression in cultured human skeletal muscle myotubes. An analysis of cellular respiration revealed that pretreating cultured skeletal muscle myotubes with GE increased palmitate-induced oxygen consumption rate, which suggested an increase in cellular fatty acid catabolism. These results demonstrated that sustained activation of the PPARδ pathway with GE attenuated diet-induced obesity and improved exercise endurance capacity by increasing skeletal muscle fat catabolism. 6-Shogaol and 6-gingerolmay be responsible for the regulatory effects of dietary ginger on PPARδ signaling.

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Sayer Ji
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