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重组人RGD-FasL对胶质瘤细胞U138/U343/U373的体外抗肿瘤的活性分析
Authors
丘劲华
庄国洪
+3 more
李文珠
罗芳洪
苏金华
Publication date
15 November 2009
Publisher
Abstract
目的研究重组人RGD-FasL对3株胶质瘤细胞U138/U343/U373的杀伤作用及机制。方法采用RT-PCR方法、MTT比色法、DNA倍体分析、流式细胞术检测融合蛋白对3株胶质瘤细胞的杀伤作用;利用Western blot法探讨其作用机制。结果FasmRNA在U138和U343细胞中有表达,在U373细胞中未有可见表达;DcR3mRNA在3株细胞中均有表达,在U373细胞中强表达。采用流式细胞术检测肿瘤细胞表面两种受体的表达情况,结果与RT-PCR相符。U138细胞株对RGD-FasL敏感并呈剂量依赖性;U343细胞株对RGD-FasL相对敏感;U373细胞对RGD-FasL不敏感。用PI检测细胞周期与凋亡表明RGD-FasL能使U138/U343细胞停留在G1期,推迟进入S期,抑制细胞生长并诱导细胞发生凋亡。Western blot实验表明RGD-FasL作用细胞后caspase-8/3/9的表达升高,Bcl-2的表达降低。结论重组人RGD-FasL可以不同程度的诱导胶质瘤细胞凋亡,其机制与其受体的表达和caspase-8/3/9、Bcl-2的表达有关
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Last time updated on 16/06/2016