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-  2017 

低密度脂蛋白诱导巨噬细胞Raw264.7脂质筏的聚集 Native Low Density Lipoprotein Induces Lipid Raft Aggregation in Macrophages Raw264.7

Keywords: 脂质筏,低密度脂蛋白,荧光漂白恢复

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Abstract:

目的:探究低密度脂蛋白(LDL)与脂质筏之间的关系。方法:运用荧光漂白恢复技术(FRAP),对LDL刺激的细胞和未经LDL刺激的细胞进行观测;采用密度梯度离心的方法分离脂质筏,对各层中胆固醇含量进行测定,通过Western Blot对脂质筏标志性蛋白flotillin-1,caveolin-1进行分析;β-环糊精孵育后,扫描电子显微镜观测细胞形态。结果:经LDL刺激的Raw264.7细胞表现出荧光漂白恢复时间延长;脂质筏区的胆固醇含量增多,脂质筏区标志性蛋白flotillin-1,caveolin-1增加;β-环糊精孵育后细胞形态发生改变,细胞胆固醇含量降低。结论:LDL能诱导细胞膜上脂质筏的聚集

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