杜雪;糜若然;

• 1:天津医科大学总医院妇产科

摘要(Abstract)：

目的:研究VEGF-C对体外培养的宫颈癌HeLa细胞增殖和凋亡的影响;研究VEGF-C受体KDR、信号通路PI3K、MAPK在VEGF-C对宫颈癌增殖和凋亡调控中的作用。方法:应用重组人VEGF-C蛋白体外刺激宫颈癌HeLa细胞,MTT法检测细胞增殖,流式细胞仪检测细胞周期和凋亡,Western blot检测增殖与凋亡相关基因Bcl-2、CyclinD1蛋白表达;应用KDR-Ab、信号通路PI3K抑制剂LY294002、信号通路MAPK抑制剂PD98059预处理HeLa细胞,再进行VEGF-C刺激,观察上述指标的变化。结果:重组VEGF-C(50ng/μl)刺激HeLa细胞后增殖指数增加(2.13 vs 1),细胞周期S期比率增多[(64.26±0.20)%vs(30.91±0.09)%,P<0.05],细胞凋亡率降低(3.29±0.35 vs 7.44±0.55,P<0.05);Bcl-2、Cyclin D1表达增加(P<0.05)。KDR-Ab、LY294002预处理后与VEGF-C组相比增殖指数降低,细胞周期S期比率下降,凋亡指数升高,Bcl-2、Cyclin D1表达降低。PD98059预处理后,与VEGF-C组相比增殖指数降低、细胞周期S期比率下降、Bcl-2、Cyclin D1表达降低,但对VEGF-C诱导的凋亡无明显影响。结论:外源性VEGF-C作用于肿瘤细胞自身的KDR受体,激活细胞内信号传导通路MAPK途径和(或)PI3K途径诱导Cyclin D1表达,使肿瘤细胞S期加快,促进细胞周期的进程,进而促进He-La细胞增殖;通过PI3K途径诱导Bcl-2表达,抑制凋亡。

关键词(KeyWords)： VEGF-C;宫颈癌;增殖;凋亡;信号传导

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 杜雪;糜若然;

DOI: 10.13283/j.cnki.xdfckjz.2011.11.010

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