Preventive Effect of Geniposide on Metabolic Disease Status in Spontaneously Obese Type 2 Diabetic Mice and Free Fatty Acid-Treated HepG2 Cells

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概要

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• Accumulation of visceral fat induces various symptoms of metabolic syndrome such as insulin resistance and abnormal glucose/lipid metabolism and eventually leads to the onset of ischemic cerebrovascular diseases. Geniposide, which is iridoid glycoside from the fruit of Gardenia jasminoides ELLIS, is recognized as being useful against hyperlipidemia and fatty liver. In order to clarify the effect of geniposide on metabolic disease-based visceral fat accumulation and the relevant molecular mechanism, experiments were performed in spontaneously obese Type 2 diabetic TSOD mice and the free fatty acid-treated HepG2 cells. In the TSOD mice, geniposide showed suppression of body weight and visceral fat accumulation, alleviation of abnormal lipid metabolism and suppression of intrahepatic lipid accumulation. In addition, geniposide alleviated abnormal glucose tolerance and hyperinsulinemia, suggesting that geniposide has an insulin resistance-alleviating effect. Next, in order to investigate the direct effect of geniposide on the liver, the effect on the free fatty acid-treated HepG2 fatty liver model was investigated using genipin, which is the aglycone portion of geniposide. Genipin suppressed the intracellular lipid accumulation caused by the free fatty acid treatment and also significantly increased the intracellular expression of a fatty acid oxidation-related gene (peroxisomal proliferator-activated receptor: PPARα). From these results, it was confirmed that geniposide has an anti-obesity effect, an insulin resistance-alleviating effect and an abnormal lipid metabolism-alleviating effect, and the metabolite genipin shows a direct effect on the liver, inducing expression of a lipid metabolism-related gene as one of its molecular mechanisms.

• 公益社団法人　日本薬学会の論文

著者

• Shimada Tsutomu

  Research Institute Of Pharmaceutical Sciences Musashino University

• ABURADA Masaki

  Research Division, Tsumura & Co.

• Miyamoto Ken-ichi

  Graduate School Of Natural Science And Technology Kanazawa University

• Shimada Tsutomu

  Res. Inst. Of Pharmaceutical Sciences Musashino Univ.

• Kojima Kazuko

  Research Institute Of Pharmaceutical Sciences Faculty Of Pharmacy Musashino University

• Kojima Kazuko

  Graduate School Of Humanities And Social Sciences University Of Tsukuba

• Nagareda Yasuhiro

  Research Institute of Pharmaceutical Sciences, Musashino University

• Watanabe Michiru

  Graduate School of Natural Science and Technology, Kanazawa University

• Ishizaki Junko

  Graduate School of Natural Science and Technology, Kanazawa University

• Sai Yoshimichi

  Graduate School of Natural Science and Technology, Kanazawa University

• Miyamoto Ken-ichi

  Graduate School Of Natural Sci. And Technol. Kanazawa Univ.

• Kojima Kazuko

  Graduate School of Natural Science and Technology, Kanazawa University

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