Effect of Peucedanum japonicum Thunb on the Expression of Obesity-Related Genes in Mice on a High-Fat Diet

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  • Nukitrangsan Natthanan
    United Graduate School of Agricultural Sciences, Kagoshima University Center of Molecular Biosciences, Tropical Biosphere Research Center, University of the Ryukyus
  • Okabe Takafumi
    Center of Molecular Biosciences, Tropical Biosphere Research Center, University of the Ryukyus
  • Toda Takayoshi
    Department of Clinical Labolatory Medicine, School of Medicine, University of the Ryukyu Hospital
  • Inafuku Masashi
    Center of Molecular Biosciences, Tropical Biosphere Research Center, University of the Ryukyus
  • Iwasaki Hironori
    Center of Molecular Biosciences, Tropical Biosphere Research Center, University of the Ryukyus
  • Yanagita Teruyoshi
    Laboratory of Nutrition Biochemistry, Department of Applied Biochemistry and Food Science, Saga University
  • Oku Hirosuke
    Center of Molecular Biosciences, Tropical Biosphere Research Center, University of the Ryukyus

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The present study describes the effect of Peucedanum japonicum Thunb (PJT) intake on the expression of obesity-related genes in mice fed a high-fat diet. To explore the mechanism underlying the effect of PJT, This study focused on the expression of genes, especially those related to obesity and metabolism syndrome, in the liver and adipose tissues. In agreement with our previous observations, intake of 10 % PJT for 4 weeks significantly reduced serum triglyceride (TG), leptin, abdominal fat, and adipocyte size. PJT also significantly increased fecal excretion of TG, decreased that of bile acid, and tended to increase the fecal excretion of total cholesterol. Microarray analysis was used to monitor changes in 324 metabolic syndrome-related genes in the liver. Statistically significant upregulation of PPP1R10, RORC, and PBEF1 genes and downregulation of DUSP1, INSIG2, and SERPINA12 genes were noted and confirmed by real-time RT-PCR. These changes were indicative of increased fatty acid oxidation in the maintenance of lipid homeostasis and insulin sensitivity in the livers of PJT-fed mice. PJT increased the expression of PPARγ, FXRα, DGAT1, and ATGL genes, suggesting an enhancement of adipocyte differentiation and normalization of functionality of adipose tissue.

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