摘要
目的:研究冬虫夏草提取物(YCC)在调血脂与抗氧化方面的活性。方法:建立高脂饮食诱导的高脂血症金黄地鼠模型,连续ig给予200 mg·kg-1的YCC 4周后,比色法测定动物血清中总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-c)与高密度脂蛋白胆固醇(HDL-c)的含量,观察YCC调节脂质代谢的活性;基于体外分子水平反应体系,运用比色、荧光、化学发光的方法评价不同浓度YCC对DPPH、超氧阴离子、羟自由基、脂质过氧自由基、过氧化氢及过氧亚硝基的清除活性;建立铜离子诱导人低密度脂蛋白(LDL)氧化修饰模型,并观察YCC对LDL氧化过程的影响。结果:与模型组比较,YCC在200 mg·kg-1剂量下明显降低了高脂饮食饲养的地鼠血清中TC,TG,LDL-c含量,同时升高HDL-c/LDL-c(P<0.05);YCC对1,1-二苯基-2-苦肼基自由基(DPPH)和过氧化氢的半数抑制浓度(IC50)分别为(125.6±3.4)mg·L-1,(758.9±11.2)mg·L-1;YCC对脂质过氧自由基、过氧亚硝基、羟自由基的最大清除率分别为(86.5±14.5)%,(64.4±3.3)%,(44.1±6.0)%;YCC在50,100 mg·L-1浓度下可明显延长铜离子诱导LDL氧化过程的滞留时相。结论:YCC在体内显示出调血脂、体外显示出抗氧化活性。
Objective:To investigate the effects of Cordyceps militaris extracts(YCC) on regulating serum lipids and antioxidation.Method:We established high-fat diet-induced hyperlipidemic golden hamster model.After the four-week administration of YCC(200 mg·kg-1),the levels of total cholesterol(TC),triglyceride(TG),low density lipoprotein-cholesterol(LDL-c),and high density lipoprotein-cholesterol(HDL-c) in serum were assayed with the method of chromatometry to observe the effects of YCC on serum lipid regulation;we also evaluated the scavenging activity of YCC against a array of free radicals,including 1,1-diphenyl-2-picrylhydrazyl radical(DPPH),superoxide anion,hydroxyl radical,peroxyl radical,hydrogen peroxide and peroxynitrite based on molecular level reactions in vitro;at the same time,we evaluated the effect of YCC on cupric ion-induced human low density lipoprotein(LDL) oxidation.Results:Compared with model group,YCC decreased the levels of serum TC,TG,LDL-c significantly,while increased the ratio of HDL-c/LDL-c(P0.05) at the dose of 200 mg·kg-1.The IC50 of YCC against DPPH and hydrogen peroxide are(125.6±3.4) mg·L-1,(758.9±11.2) mg·L-1 respectively.The maximal scavenging activity of YCC against peroxyl radical,peroxynitrite and hydroxyl radical is(86.5±14.5)%,(64.4±3.3)%,(44.1±6.0)%.In addition,YCC prolonged the lag phase of LDL oxidation process at 50,100 mg·L-1.Conclusion:YCC displayed serum lipid regulating in vivo and antioxidative activity in vitro.
出处
《中国实验方剂学杂志》
CAS
北大核心
2011年第12期127-131,共5页
Chinese Journal of Experimental Traditional Medical Formulae
基金
国家自然科学基金项目(30873063)
北京市自然科学基金项目(7092068)
关键词
冬虫夏草提取物
高脂血症
调血脂
自由基
低密度脂蛋白
抗氧化
Cordyceps militaris extracts
hyperlipidemia
regulating blood lipids
free radical
low density lipoprotein
antioxidation