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Regulation of cell apoptosis by activin A in human cytotrophoblasts in the first trimester
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF PERINATAL MEDICINE
- Issue:
- 4
- DOI:
- 10.3760/cma.j.issn.1007-9408.2006.04.004
- Key Word:
- 激活素A;妊娠初期;滋养层;细胞凋亡;半光氨酸天冬氨酸蛋白酶类;蛋白质P53
Abstract： 目的探讨激活素A(Activin A,ActA)对细胞滋养层细胞凋亡的调节作用. 方法用ActA刺激无血清培养的7～8周人绒毛细胞滋养层细胞后,激光共聚焦和蛋白印迹分析检测凋亡信号通路相关蛋白的表达变化,TUNEL检测细胞凋亡情况.结果高浓度ActA(50 ng/ml)作用24 h后,人绒毛细胞滋养层细胞中TUNEL阳性信号显著增强;同时Caspase-3,-9表达量明显提高(对照组:0.13±0.048和0.26±0.004;50 ng/ml组:0.34±0.068和1.54±0.062;100 ng/ml组:0.45±0.091和0.58±0.008),Caspase-8表达亦略有增加;凋亡相关蛋白P53(对照组:5.2±1.02;50ng/ml组:12.3±1.91;100 ng/ml组:11.5±1.73)和Bax(对照组:0.09±0.021;50 ng/ml组:0.46±0.065;100 ng/ml组:0.68±0.142)表达水平显著增加.结论高浓度ActA可诱导人细胞滋养层细胞发生凋亡,其作用可能主要是通过细胞凋亡的线粒体途径来实现的.
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