机构地区:[1]福建医科大学省立临床医学院 [2]福建省立医院心内科,福建福州350001
出 处:《中国医药导报》2014年第9期12-16,共5页China Medical Herald
摘 要:目的 探讨定位性动脉粥样硬化模型中动脉粥样硬化的发病机制及各因素间内在联系.方法 将48只新西兰白兔随机分成两组:对照组6只给予基础饲料+假手术,模型组42只饲以1%胆固醇、6%猪油的高脂饲料8周,进食高脂饲料后1周行髂动脉球囊内膜剥脱术.酶学法测定三酰甘油(TG)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)水平;放免法测定血浆内皮素(ET)、血栓素B2(TXB2)、6-酮-前列腺素F1α(6-Keto-PGF1α)水平;硝酸还原法测定血清一氧化氮(NO)水平;免疫比浊法测定二磷酸腺苷(ADP)诱导的最大血小板聚集率(MPA).8周时进行髂动脉造影,处死对照组及部分模型组动物行光镜检查.使用SPSS 19.0统计软件进行配对或非配对t检验,并进行多元线性回归分析,相关分析采用Pearson检验.结果 模型组中所有髂动脉都有不同程度(15%~100%)的狭窄,平均(61.47±28.10)%,对照组未见明显狭窄.与对照组[TG:(0.96±0.78) mmol/L,TC:(1.89 ±0.60) mmol/L,LDL-C:(0.85 ±0.42) mmol/L,ET:(297.55 ±44.67)ng/L,MPA:(33.72 ±6.35)%,TXB2:(68.55±8.90)ng/L,TXB2/6-Keto-PGF1α:19.67±3.38]相比,血清或血浆TG 、TC、LDL-C、ET、MPA、TXB2和TXB2/6-Keto-PGF1α比值在模型组中均显著增高[TG:(4.61 ±2.15) mmol/L,TC:(40.49±9.53) mmol/L,LDL-C:(36.96±8.17) mmol/L,ET:(386.78±52.92)ng/L,MPA:(48.10±7.25)%,TXB2:(184.14±27.51)ng/L,TXB2/6-Keto-PGF1α:85.75±37.50],差异有高度统计学意义(P<0.01),除TG外上述指标血清或血浆浓度均分别与髂动脉最大狭窄程度(MSD)呈正相关(P<0.05);而与对照组[HDL-C:(0.64±0.18)mmol/L,NO:(71.83±3.81) μmol/L,6-Keto-PGF1α:(361.11±71.69)ng/L,NO/ET比值:23.30±0.76]比较,血清或血浆HDL-C、NO、6-Keto-PGF1α以及NO/ET比值在模型组均显著减少[HDL-C:(0.33±degrees of stenosis ranging from 15% to 100%,with the average of (61.47 ± 28.10) % in model group,but no Objective To investigate the pathological mechanism of atherosclerosis and internal relations among various factors in focal atherosclerotic model.Methods 48 New Zealand white rabbits were randomly divided into two groups:control group was given standard diet and sham operation (n=6),model group was given an atherogenic diet with 1%cholesterol and 6% pig oil for 8 weeks and balloon endometrial stripped in iliac artery was done 1 week after atherogenie diet (n=42).Before and after 8 weeks of dietary intervention,bood samples were collected for enzymatic measurement of serum triglyceride (TG),total cholesterol (TC),low-density lipoprotein cholestrol (LDL-C) and high-density lipoprotein cholestrol (HDL-C).Plasma endothelin (ET),thromboxane B2 (TXB2),6-keto-prostaglandin F1α (6-keto-PGF1α) were detected by radioimmunoassy.Serum nitric oxide (NO) was measured by nitrate reductase,and maximal platelet aggregation (MPA) rate following adenosine diphosphate (ADP) activation in vitro was assessed by immunoprecipitation.At the end of the dietary intervention,iliac artery quantitative angiography was made and iliac arteries in control and partial model group (n=6) were examined by light microscopy.Paired or unpaired t test,multiple linear regression analysis and Pearson correlation analysis were carried out by SPSS 19.0.Results All iliac arteries had various obvious stenosis in control group.Compared with control group [TG:(0.96±0.78) mmol/L,TC:(1.89±0.60) mmol/L,LDL-C:(0.85±0.42) mmol/L,ET:(297.55±44.67) ng/L,MPA:(33.72±6.35) %,TXB2:(68.55±8.90) ng/L,TXB2/6-Keto-PGF1α:19.67±3.38],serum or plasma TG,TC,LDL-C,ET,TXB2 concentration and the ratio of TXB2 to 6-keto-PGF1α significantly increased in model group [TG:(4.61±2.15) mmol/L,TC:(40.49±9.53) mmol/L,LDL-C:(36.96±8.17) mmol/L,ET:�
分 类 号:R543.5[医药卫生—心血管疾病]
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