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阿托伐他汀对脂多糖诱导人主动脉内皮细胞细胞间黏附分子-1表达的影响*

2016-10-12嵇云鹏张彦燕石廷雨徐旖旎沈祥春

贵州医科大学学报 2016年8期
关键词:贵州模型

嵇云鹏, 张彦燕, 杨 红,3, 石廷雨,3, 徐旖旎, 陶 玲, 沈祥春,3**

(1.贵州医科大学 天然药物资源优效利用重点实验室, 贵州 贵阳 550025; 2.贵州省人民医院 药剂科, 贵州 贵阳 550002; 3.贵州医科大学 中药药理教研室, 贵州 贵阳 550025)



·基础研究·

阿托伐他汀对脂多糖诱导人主动脉内皮细胞细胞间黏附分子-1表达的影响*

嵇云鹏1,2, 张彦燕1, 杨红1,3, 石廷雨1,3, 徐旖旎1, 陶玲1, 沈祥春1,3**

(1.贵州医科大学 天然药物资源优效利用重点实验室, 贵州 贵阳550025; 2.贵州省人民医院 药剂科, 贵州 贵阳550002; 3.贵州医科大学 中药药理教研室, 贵州 贵阳550025)

目的: 观察阿托伐他汀(Atv.)对脂多糖(LPS)诱导人主动脉内皮细胞(HAECs)细胞间黏附分子-1(ICAM-1)表达的影响,并探讨其分子机制。方法: 用1 mg/L LPS复制HAECs损伤模型,通过MTT和乳酸脱氢酶(LDH)外漏率实验观察5 μmol/L Atv.对LPS诱导HAECs损伤的保护作用,采用RT-PCR法检测Atv.对ICAM-1 mRNA表达的影响,Western blot检测Atv.对ICAM-1、IκBα及NF-κB蛋白表达水平的影响。结果: 与LPS组比较,Atv.能有效抑制LPS诱导的HAECs损伤,细胞活力增加(P<0.01),LDH外漏率减少(P<0.01),Atv.可抑制LPS诱导的ICAM-1 mRNA(P<0.05)和蛋白表达上调(P<0.01),还可抑制LPS诱导的IκBα蛋白表达水平的降低和phospho-NF-κ B p65蛋白表达水平的升高(P<0.01)。结论: 阿托伐他汀对LPS诱导HAECs损伤具有保护作用,并有效抑制ICAM-1的表达,该作用与抑制IκBα降解及NF-κB p65磷酸化有关。

阿托伐他汀; 人主动脉内皮细胞; 细胞间黏附分子-1; 核因子-κB

[Abstract]Objective: To observe the effect and mechanism of atorvastatin on the expression of ICAM-1 in lipopolysaccharide (LPS)-induced injury of cultured human aortic endothelial cells (HAECs). Methods: Cultured HAECs were treated with LPS alone (1 mg/L) or in the presence of atorvastatin (Atv.,5 μmol/L). MTT and LDH leakage ratio were used to analyze the protective effect of atorvastatin against LPS. The RT-PCR was used to determine the mRNA expression of ICAM-1. The western blot was adopted to detect the protein expression of ICAM-1, IκBα, NF-κB in HAECs injury induced by LPS. Results: Compared with LPS group, atorvastatin could effectively inhibit LPS-induced injury by increasing cell activity(P<0.01), decreasing LDH releasing ratio(P<0.01), inhibiting the up-regulating mRNA(P<0.05) and protein (P<0.01) expression of ICAM-1, inhibiting the decreasing of phospho-NF-κB p65 protein expression (P<0.01) and the increasing of IκBα protein expression (P<0.01). Conclusion: Atorvastatin has a protective effect on LPS induced HAECs injury, and can effectively inhibit the expression of ICAM-1, which is related to the inhibition of IκBα degradation and NF-κB p65 phosphorylation.

[Key words]atorvastatin; human aortic endothelial cells; intercellular adhesion molecule-1; nuclear factor-κB

细胞-细胞间黏附作用在多种刺激诱导的免疫应答中起重要作用。细胞间黏附分子-1(ICAM-1)与整合素家族成员淋巴细胞功能相关抗原-1(LFA-1)及巨噬细胞分化抗原(Mac-1)结合,介导LFA-1阳性细胞发生黏附及其它生物学反应,在单核细胞与内皮细胞紧密黏附过程中发挥着极为重要的作用[1]。ICAM-1在脑缺血、帕金森、癌症等疾病ICAM-1表达异常升高,认为ICAM-1表达异常与肝癌、肺癌及结肠癌等肿瘤的发生发展有关[2-4];研究还发现,动脉粥样硬化(atherosclerosis, AS)斑块中和缺血再灌注损伤后的内皮细胞中ICAM-1表达也升高[5-6],因此ICAM-1已成为预防和治疗多种疾病的潜在靶点。……

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