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组蛋白去乙酰化酶抑制剂促进肺腺癌A549细胞株凋亡机理的研究 被引量:1

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摘要 收集2×106个A 549肺腺癌细胞,以含10%胎牛血清培养后,随机分为观察组及对照组各1×106个细胞,观察组分别加入0.1、0.2、0.5μm o l/L浓度的曲古抑菌素A(TSA),对照组不予处理。观察两组A 549细胞凋亡、细胞周期及caspase-8、caspase-9表达情况。结果观察组A 549细胞凋亡率明显高于对照组,呈现时间、浓度依赖性效应关系,药物作用后72 h,0.5μm o l/L TSA处理的A 549细胞凋亡率最高,达50%;而对照组A 549细胞凋亡率在各时间点均无明显变化。观察组细胞主要积聚在G2/M期,呈浓度依赖性,0.1、0.2、0.5μm o l/L的TSA处理后,细胞积聚在G2/M期的比例分别为23.4、35.8、39.7,与对照组比较P均<0.05。W estern b lot检测证实,TSA诱导了A 549肺腺癌细胞caspase-8、caspase-9裂解活化,随着TSA作用时间延长,其蛋白着色深度逐步升高。证实TSA可诱导A 549细胞株凋亡,其机制可能为触发一种存在于正常细胞的G2检测点功能,引发cas-pase蛋白酶的级联反应。
出处 《山东医药》 CAS 北大核心 2006年第26期32-33,共2页 Shandong Medical Journal
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