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Bcl-2家族在阿司匹林诱导人小细胞肺癌A549细胞凋亡中的作用 被引量:7

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摘要 目的研究阿司匹林对人小细胞肺癌A549细胞体外增殖抑制作用及凋亡的影响,探究Bcl-2在诱导凋亡机制中的作用。方法运用体外细胞培养,阿司匹林以不同浓度(1、2.5、5、7.5、10mmol/L)作用于人小细胞肺癌A549细胞。采用噻唑蓝(MTT)法测定阿司匹林对细胞杀伤率;用流式细胞检测法测定细胞周期时相改变及细胞凋亡率;琼脂糖电泳法观察凋亡细胞DNALadder现象;Westernblot检测凋亡相关基因Bcl-2等表达;荧光染色观察细胞线粒体膜电位的改变。结果阿司匹林对人小细胞肺癌A549细胞有较强的抑制作用,有明显的时间和剂量依赖性;可使A549细胞G0/G1期和G2/M期比例明显下降,S期比例升高;诱导细胞凋亡发生;阿司匹林作用A549细胞后,Bcl-2表达量减少,Bax表达增加,Caspase3活化,线粒体膜电位改变。结论阿司匹林在体外可有效抑制人小细胞肺癌A549细胞增殖,可能通过影响肿瘤细胞DNA合成,改变细胞周期时相分布、诱导凋亡发挥抑制细胞增殖作用,其凋亡机制与Bcl-2表达减少,线粒体膜跨膜电位下降相关。
出处 《广东医学》 CAS CSCD 北大核心 2010年第11期1389-1391,共3页 Guangdong Medical Journal
基金 三峡大学青年科学基金资助项目(编号:KJ2008A038)
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参考文献9

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