In order to study the effects of Ampelopsis grossedentata on endogenous cholesterol biosynthesis and the effects of reducing blood lipid in hyperlipidemia rats,extraction of flavonoids from Ampelopsis grossedentata by using ethanol(TFAG),and the effects of TFAG on intracellular cholesterol synthesis were detected by amphotericin B-cell model;SD hyperlipidemia rat model was established by feeding high fat diet.A formulated medicine called Xuezhikang was used as a positive control,and TFAG of different doses were administered to the stomach for 30 d continuously to measure the indexes of heart,liver tissue homogenate and serum;part of the liver was taken for pathological observation.The results showed that TFAG could significantly inhibit the synthesis of cholesterol in cells.TFAG of different doses could significantly reduce the content of TC and TG in serum of hyperlipidemia rats,and increase the content of HDL;TC and TG in heart and liver were also decreased;besides,it could increase the content of SOD,CAT and GSH in the liver of hyperlipidemia rats,and reduce the content of MDA.The results of pathological section showed that TFAG could improve the damage degree of hepatocytes in hyperlipidemia rats,and the effect of high dose group was similar to that of Xuezhikang group.In general,TFAG has good antioxidant and reducing blood lipid effects,and can effectively inhibit liver steatosis.
