仙人掌粉对大鼠血脂的调节作用及其机制的探讨

目的:观察仙人掌粉对大鼠血脂的调节作用,并探讨其作用机制。方法:分别以基础饲料、基础饲料加高、中、低剂量仙人掌粉饲喂正常大鼠,观察仙人掌粉对正常大鼠血清总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL C),低密度脂蛋白胆固醇(LDL C)、动脉硬化指数(AI),血清丙二醛(MDA),超氧化物歧化酶(SOD)等指标的影响。将造模成功的高血脂大鼠随机分为4组:分别为模型对照组和仙人掌粉高、中、低3剂量组,后者按高、中、低3种剂量给予样品。以上各组继续喂饲高脂饲料,3周后分别取血测定上述指标。结果:仙人掌粉对正常大鼠血清TC有降低作用,但与正常饲料组比较无显著差异(P>0.05),对正常大鼠TG,HDL C无影响。能明显降低正常大鼠MDA含量,升高SOD活性,与对照组比较,差异均有显著性意义。对于实验性高脂血症大鼠,仙人掌粉高、中、低3剂量组均能显著降低血清TC,LDL C,AI(P<0.01),TG(P<0.05),且其降脂作用与给药剂量有关。结论:仙人掌粉对正常大鼠及实验性高脂血症大鼠血脂均有调节作用,而对后者作用更为显著。

Regulative effect of opuntia powder on blood lipids in rats and its mechanism

OBJECTIVE: To observe the regulative effect of opuntia powder on blood lipids in wistar rats and to explore its mechanism. METHOD: Forty normal rats were divided into four groups:control group (fed with basal feed), opuntia high, middle and low dosage groups (fed with basal feed and opuntia powder of high, middle and low dosage. The influence of opuntia powder on serum total cholesterol (TC), triglyceride (TG), high density lipoprotein-cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C), arteriosclerosis index (AI), serum malondialdehyde (MDA), superoxide dismutase (SOD) were observed. (2) All of the hyperlipemia wistar rats for experiments were divided into four groups: model control group and other three groups (high, middle, low dosage groups respectively). Three weeks later, samples of blood were taken for survey of levels of TC, TG HDL-C, LDL-C, AI, MDA, SOD. RESULT: After opuntia powder treatment,the level of TC in nomal wistar rats was decreased. However, there was no significant difference comparing with control group (P > 0.05). The serum MAD level in the low, middle and high dosage groups were all obviously decreased, which were significantly lower than that in the control group. The SOD activities were all higher than that in the control group. The level of TC, LDL-C, AI (P < 0.01), TG (P < 0.05) were lower significantly in hyperlipemia wistar rats after treated by opuntia powder of high, middle and low dosage. The down-regulation of blood lipids was related with the dosage of opuntia powder. CONCLUSION: The opuntia powder may regulate the level of blood lipids in normal and hyperlipemia wistar rats. The effect is more obviously in hyperlipemia rats than that in normal rats.