Abstract

目的 探讨体外培养品状体上皮细胞(LECs)的衰老情况以及衰老LECs对凋亡诱导因素的敏感性.方法体外培养兔LECs并传代.对第1、4、7代LECs进行研究,β-半乳糖苷酶组织化学染色检测衰老细胞,分析细胞衰老百分数的差异;原位末端标记法(TUNEL)检测培养过程中细胞的凋亡状况;10μmol/L喜树碱诱导细胞凋亡,比较各代细胞对喜树碱诱导凋亡敏感性的差异. 结果 LECs在体外培养过程中表现为有限生长的特性,经过增生、传代后衰老细胞增加.各代LECs在不受干预的情况下不发生凋亡.第1、4、7代LECs对喜树碱凋亡诱导因素的敏感性差异有统计学意义.结论 LECs在体外培养过程中表现为有限生长的特性,增生的细胞以衰老为结局,衰老的LECs在不受外界干扰的情况下不发生凋亡,但对凋亡诱导因素的敏感性增加。

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