苦荞麦总黄酮对高脂血大鼠血脂和抗氧化作用的影响

目的:研究苦荞麸总黄酮对实验性高脂血症大鼠的降脂和抗氧化作用。方法:7w龄,60只Wistar大鼠,按体重随机分为6组;除正常对照组外,其余各组用高脂饲料制作动物高脂血症模型,其中苦荞麸总黄酮分为0.2、0.5、1.0g/kgbw剂量组;以绞股兰总苷片(0.032g/kgbw)为阳性对照组;正常组、模型组为10ml/kgbw蒸馏水,各组每天灌胃一次,连续6w。最终测定血脂、肝脂和抗氧化相关指标。结果:苦荞麸总黄酮各组与模型组比较:各剂量组均能有效地降低血清甘油三酯(TG)、总胆固醇(TC)和肝脏TC、TG值,其中小剂量组降血清TG、抗动脉硬化和抗血清脂质氧化效果显著,不仅使血清TG降低73.9%,TC降低36.4%,还能提高血清谷胱甘肽过氧化物酶(GSH-Px)活性和抗动脉粥样硬化指数(AAI)值,降低致动脉粥样硬化指数(AI)值和血清丙二醛(MDA)含量,且不引起肝脏指数(LI)变化。结论:苦荞麸总黄酮能显著降低大鼠血脂、肝脂水平,提高血清抗氧化酶活性,抑制血清脂质过氧化物产生。

EFFECTS OF TOTAL FLAVONOIDS EXTRACT OF TARTARY BUCKWHEAT GERM ON SERUM LIPIDS AND ANTIOXIDATION IN HYPERCHOLESTEROLEMIC RATS

Objective: To study the effects of the total flavonoids of tartary buckwheat germ (TFTBG) on serum lipid and antioxidation in hypercholesterolemic rats. Method: According to body weight,60 Wistar rats were divided randomly into 6 groups: normal control group (NC), high-fat control group (HFC), Jiaogulan positive control group (JPC, Gynostemma pantaphyllum total glucoside tablet 0.032g/kg bw),TFTBG 1.0,0.5and TFTBG 0.2 g/kg bw (HD,MD,LD) group. Except NC group, all other groups were fed high-fat diet for hyperlipidemia model. NC group and HFC group were given distilled water 10 ml/kg bw. Water and TFTBG were given by gavage once a day for 6 w respectively. Serum TG, TC HDL-C, LDL-C, apoA1, apoB, SOD, GSH-Px and MDA were determined. Results: Compared with HFC group, serum TG ,TC were lowered significantly(P<0.01,P<0.01) in all TFTBG groups. Hepatic TC and TG were lowered significantly too. In LD group, serum GSH-Px and AAI were elevated, while serum MDAand AI were lowered. Conclusion: TFTBG can lower serum and hepatic lipid level and elevate the activity of antioxidative enzymes significantly. It has antioxidant and hypocholesterolemtic capacity in hypercholesterolemic rats.