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Effect of hesperetin, a citrus flavonoid, on the liver triacylglycerol content and phosphatidate phosphohydrolase activity in orotic acid-fed rats

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Abstract

The effect of dietary hesperetin on the hepatic lipid content and the enzyme activities involved in triacylglycerol (TG) synthesis in rats fed diets with or without 1% orotic acid (OA) was studied. Hepatic TG content was raised by approximately 5-fold after administration of OA for 10 days. The OA-feeding significantly increased the activity of hepatic microsomal phosphatidate phosphohydrolase (PAP), which is the rate-limiting enzyme for TG synthesis. Hepatic glucose-6-phosphate dehydrogenase (G6PDH) and malic enzyme activities were also increased. An addition of 1% hesperetin to the OA-supplemented diet resulted in the decrease of the hepatic TG content by 44% and of microsomal PAP activity. Dietary hesperetin alone neither affected liver TG content nor PAP activity significantly. OA-feeding caused an increased liver cholesterol level, whereas simultaneous addition of hesperetin and OA reduced its content to the control level. A slight reduction of hepatic cholesterol by hesperetin was also observed in the OA-free dietary group. The present study demonstrated that dietary hesperetin can reduce the hepatic TG accumulation induced by OA, and this was associated with the reduced activity of TG synthetic enzyme, PAP.

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Authors and Affiliations

  1. Faculty of Natural Resources and Life Science, Dong-A University, Pusan, 604-714, Korea

    J.-Y. Cha, Y.-S. Cho & I. Kim

  2. Nippon Shinyaku Co., Ltd, Japan

    T. Anno

  3. Department of Applied Biological Sciences, Saga University, Saga, 840, Japan

    S.M. Rahman & T. Yanagita

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  1. J.-Y. Cha
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  2. Y.-S. Cho
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  6. T. Yanagita
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Cha, JY., Cho, YS., Kim, I. et al. Effect of hesperetin, a citrus flavonoid, on the liver triacylglycerol content and phosphatidate phosphohydrolase activity in orotic acid-fed rats. Plant Foods Hum Nutr 56, 349–358 (2001). https://doi.org/10.1023/A:1011884200848

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