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[Effects of pure total flavonoids from Citrus changshan-huyou on blood lipid metabolism in hyperlipidemic rats].
Zhongguo Zhong Yao za Zhi = Zhongguo Zhongyao Zazhi = China Journal of Chinese Materia Medica 2017 March
To observe and investigate the effects and mechanisms of the pure total flavonoids from Citrus changshan-huyou(PTFC) on blood lipid metabolism in hyperlipidemic rats. SD rats were fed with high fat diet for 4 weeks to induce hyperlipidemic rats model, meanwhile three dosages (50, 100, 200 mg•kg ⁻¹•d ⁻¹) of PTFC were administrated intragastrically for 4 weeks respectively.After 2 weeks of modeling, their tail blood was taken and serum TC, TG, and HDL-C levels were detected by biochemical method and their body weight was measured. After 4 weeks of modeling, their body weight was measured and liver weight was measured, then the levels of TC, TG, HDL-C, LDL-C, ALT, AST, MDA and SOD in serum were detected to calculate lipid comprehensive index(LDL-C/HDL-C and LDL-C/TC ratios) and atherogenic index(AI); in addition, MDA and SOD levels were detected by biochemical method. The hitopathological changes of the liver tissues were observed by HE staining; the protein expression levels of PPAR-α, Lpl, and Lipc were detected by ELISA; and the mRNA expression levels of PPAR-α in the liver tissue were detected by Real-time PCR. The results showed that gavage administration of the PTFC significantly decreased the body weight, liver weight, liver index, serum ALT and AST activities, the levels of serum TC, TG, LDL-C, LDL-C/HDL-C, AI and increased serum HDL and LDL/TC level. Moreover, the PTFC significantly enhanced SOD activity and decreased the concentration of MDA in serum and liver tissue. Further mechanism investigation indicated that PTFC inhibited serum lipid accumulation by increasing the expressions PPAR-α, Lpl, Lipc protein and PPAR-α mRNA of the liver tissues. PTFC could actively regulate blood lipid metabolism by ameliorating hepatic function, improving the body's antioxidant capacity, lowering levels of oxidative stress, as well as positively regulating the expression levels of PPAR-α, Lpl, Lipc protein and PPAR-α mRNA of the liver tissues in rats.
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