板蓝根水提物预防大鼠高脂血症

摘要

AIM To observe the effects of aqueous extract of Isatidis Radix (AEIR) on formation of hyperlipidemia in rats.METHODS Seventy-two male SD rats were randomly divided into six groups,normal control group,model group,AEIR low-dose (20 mg/kg),middle-dose (40 mg/kg),high-dose (80 mg/kg)groups and fenofibrate (20 mg/kg) group.Drugs were intragastrically administered for 40 days,body weights were recorded every five days.The rats in the normal control group were fed with ordinary diet,those in the other five groups were fed with high fat diet.At the end of experiment,the rats were killed,then ratio of fat weight to body weight,serum lipid level,LPL,HL,MDA and SOD were detected.The pathological changes of liver tissue were observed by light microscope.RESULTS AEIR significantly decreased body weight,fat weight and ratio of fat weight to body weight;significantly reduced the levels of TC,TG and LDL;significantly enhanced the activities of LPL and HL;significantly decreased MDA content and increased SOD activity in serum and liver tissue.Compared with the model group,the adipose degeneration of liver tissue in the various AEIR groups and fenofibrate group was improved.CONCLUSION AEIR can prevent the formation of hyperlipidemia in rats by regulating lipid metabolism.%目的 观察板蓝根Isatidis Radix水提物对大鼠高脂血症形成的影响.方法 将72只雄性SD大鼠随机分成6组,正常对照组,模型组,板蓝根水提物低、中、高剂量组(20、40、80 mg/kg)及非诺贝特(20 mg/kg)组,灌胃给药40d,每5d记录1次体质量.除正常对照组大鼠喂食普通饲料外,其余5组均给予高脂饲料.实验结束后处死大鼠,对脂体比、血脂水平、脂蛋白脂酶(LPL)、肝脂酶(HL)、丙二醛(MDA)、超氧化物歧化酶(SOD)进行检测,光镜观察肝组织病理变化.结果 板蓝根水提物显著降低体质量、脂肪质量、脂体比;显著减少总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白(LDL)水平;显著增加LPL、HL活性;显著降低血清和肝组织中MDA含有量,升高SOD活性.与模型组相比,板蓝根水提物各组和非诺贝特组中肝组织脂肪变性有所改善.结论 板蓝根水提物可通过调节脂质代谢来预防大鼠高脂血症的形成.