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NOS/NO在酒精致血管内皮损伤效应中的作用

The Effect of Nitric Oxide Synthase/Nitric Oxide in Vascular Endothelium Damage Induced by Alcohol

【作者】 李友

【导师】 让蔚清;

【作者基本信息】 南华大学 , 卫生毒理学, 2006, 硕士

【摘要】 目的:本实验通过检测动物血清及细胞培养液中MDA、NO、NOS、ADMA等指标,从脂质过氧化与NO代谢等两条途径探讨酒精对血管内皮的损伤作用及其可能机制。方法:实验分为两个部分,即动物实验和细胞培养实验。动物实验选用SD大鼠(雄性、56只、体重约250g)灌胃给予不同剂量饮用酒(红星二锅头,1mL/100g),每天一次,连续2个月,建立酒精摄入的动物实验模型。实验分为7组(n=8)。(1)对照组,(2)低、中、高三个剂量的饮酒组(红星二锅头,14V/V、28V/V、56V/V),(3)高脂饮食组,(4)高脂饮食联合中剂量酒精组(28V/V),灌胃给予红星二锅头的同时,给予高脂饲料,(5)维生素E保护组,在(4)组基础上,每天给予维生素E(100mg/kg,灌酒前1h灌胃给予)。造模2个月后,按常规操作取动物血清,测定动物血清中血糖、总胆固醇、甘油三酯(分光光度法)、MDA(硫代巴比妥酸法)、NO(硝酸还原酶法)的含量与NOS(包括iNOS、eNOS、总NOS,生化法)的活性;并测定血清中ADMA(HPLC法)的含量,评价长期高剂量饮酒联合高脂饮食的心血管效应。细胞实验采用含10%小牛血清的DMEM培养基培养HUVEC-12细胞株。待细胞长至80%融合,换用1%小牛血清DMEM培养基同步化24h,用不同浓度的乙醇(0、25、50、100、200mmol/L)与细胞共培养,建立细胞实验模型。实验分组:(1)D-Hank’s对照组,(2)不同浓度乙醇处理组(25、50、100、200mmol/L),(3)H2O2阳性对照组(500μmol/L),(4)VitC保护组(100mg/L),在乙醇(100mmol/L)

【Abstract】 Objective: In the present study, we examined the injuring effects of vascularendothelium induced by alcohol; we also examined injuring effects of alcohol on cultured human umbilical vein endothelial cell ( HUVEC-12 ) and explored whether the injuring effects of alcohol were related to both changes of ADMA level in serum or culture medium and lipid peroxidation.Methods: The experiment was divided into two parts. In the one part, Sprague-Dawley male rats weighing about 250g were actively given the three doses of alcohol (14V/V、 28V/V、 56V/V) by intragastrication in 1mL/100g, one time per day for two months. On the60th day, the blood samples were collected from femoral arteries, centrifuged(3500rpm,10min) and separated immediately. Serum concentrations of glucose (GLU), total cholesterol (TCHO), triglyceride (TG) (spectrophotometric method) were determined. In the case of the time-effect of alcohol, serum concentrations of GLU, TCHO, TG at 20th, 40th and 60th day after alcohol being given were determined. Serum concentrations of MDA (thiobarbituric acid method), NO (Griess method) and ADMA (HPLC) levers were determined. Serum activity of NOS (biochemical approach) was determined.The experimental rats were randomly divided into 7 groups: (1) negative group, rats were given with equal volume of distilled water; (2) the alcohol groups, rats were given with different alcohol at concentrations (Hongxing Erguotou, 14V/V、 28V/V、 56V/V); (3) high fat diet group, rats were given with high fat diet; (4) high fat diet & alcohol at middle concentrations group (28V/V); (5) VitE (100mg/kg) protective group, rats were given with

  • 【网络出版投稿人】 南华大学
  • 【网络出版年期】2006年 11期
  • 【分类号】R114
  • 【被引频次】4
  • 【下载频次】157
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