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Fas死亡受体及FLIP对大肠癌细胞凋亡的影响

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摘要 目的:比较不同大肠癌细胞Fas受体及其下游通路抑制因子FLIP的表达差异,探讨Fas、FLIP对大肠癌细胞凋亡的影响. 方法:体外培养大肠癌细胞,应用直接免疫荧光流式细胞术检测细胞表面Fas表达率,半定量RT-PCR法测定FLIP mRNA的水平,并采用Annexin V法评价细胞对Fas介导的凋亡的敏感性. 结果:大肠癌细胞表面Fas表达率不同,其中HT-29细胞的表达率为42.46±4.32%,明显高于其他3株细胞.SW620 和HT-29细胞FLIP mRNA含量较高,Colo205居中,Lovo 则呈阴性;且相对于任何一株FLIP表达阳性的细胞,FLIPL的表达水平均高于FLIPs.给予凋亡诱导型抗Fas抗体(CH-11)刺激后,4株大肠癌细胞凋亡敏感性均较低. 结论:不同的大肠癌细胞株可能通过不同途径逃避Fas介导的凋亡,其中包括下调Fas的表达和上调FLIP的含量.
出处 《世界华人消化杂志》 CAS 北大核心 2005年第13期1590-1592,共3页 World Chinese Journal of Digestology
基金 天津市自然科学基金资助项目 No.013611511
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参考文献11

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