亚砷酸钠对上皮细胞向间充质细胞转变过程的影响
董雪;李晓翠;史艳芬;范洪学;李荣贵
【期刊名称】《中国老年学杂志》 【年(卷),期】2011(031)001
【摘要】目的 研究亚砷酸钠(NaAsO2)对上皮细胞向间质细胞的转变(epithelial to mesenchymal transition,EMT) 过程的影响.方法 ①EMT模型的建立:培养小鼠乳腺上皮细胞(NMuMG),当细胞大约融合50%时,换成3%血清的培养基,24 h后加入5 ng/ml TGF-β,作用24 h后,观察NMuMG形态,细胞染色检测E-ca、Vimentin表达、实时定量RT-PCR检测E-ca,Vimentin mRNAs 表达水平,是否成功的由上皮细胞转变成间质细胞.②加入NaAsO2:以5 ng/ml TGF-β作为阴性对照组,观察组5 ng/ml TGF-β+5 μmol/ml NaAsO2、5 ng/ml TGF-β+10 μmol/ml NaAsO2,再次检测上述指标.结果 ①成功建立EMT模型:细胞形态由立方形的上皮细胞转变成长梭形间质细胞;细胞染色显示,与未诱导组相比,E-ca表达呈阴性,Vimentin表达明显呈阳性;E-ca基因表达水平显著下降,Vimentin基因表达水平显著上调.②NaAsO2对EMT过程的影响:一定浓度范围内,随NaAsO2浓度升高,明显增强了Vimentin表达;E-ca基因水平逐渐降低,Vimentin基因水平明显升高,呈剂量-效应关系.结论 NaAsO2促进了EMT过程,可能是砷中毒引发癌症的发病机制之一.%Objective To explore the effect of sodium arsenite on the epithelial to mesenchymal transition (EMT)process. Methods NMuMGs were cultured, when it grew up to 50% , 3% serous medium were changed, and 5 ng/ml TGF-β was added into medium after 24 hour. When 5 ng/ml TGF-β working on