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茶多酚对氧化型低密度脂蛋白损伤后内皮细胞微管蛋白的影响 被引量:1

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摘要 目的研究茶多酚(TP)对氧化型低密度脂蛋白(ox-LDL)损伤的人脐静脉血管内皮细胞(HUVEC)α-微管蛋白和β-微管蛋白的影响。方法将实验分为四组TP组(25μg/ml),ox-LDL(200μg/ml)+TP组(25μg/ml),ox-LDL组(200μg/ml)及对照组(等体积溶剂)。采用四唑盐(MTT)比色法测定细胞活性,免疫组化法测定α-微管蛋白和β-微管蛋白的表达。结果MTT结果显示,ox-LDL可明显抑制HUVEC增殖,与对照组相比,增殖率降低了40%(P<0.05)。TP和ox-LDL共同培养,细胞增殖率明显上升,与对照相比仅降低7.8%(P>0.05)。免疫组化结果显示,ox-LDL下调HUVECα-微管蛋白和β-微管蛋白表达,分别为35%(P<0.01)和40%(P<0.01),TP与ox-LDL共同培养后,α-微管蛋白表达无明显升高(12%,P>0.05),β-微管蛋白表达升高了32%(P<0.05)。结论TP具有抑制ox-LDL诱导的HUVEC生长抑制的作用,且可以逆转ox-LDL引起的β-微管蛋白表达的降低作用。
出处 《卫生研究》 CAS CSCD 北大核心 2007年第1期100-101,共2页 Journal of Hygiene Research
基金 山东省自然科学基金(No.Y2002C42)
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