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MAWD与MAWBP共表达抑制胃癌细胞的EMT

Journal of Shihezi University(Natural Science)(2015)

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Abstract
为探讨胃癌差异表达蛋白MAWD和MAWBP对胃癌细胞EMT的影响.采用pcDNA3.1构建MAWD真核表达载体,在胃癌细胞SGC7901中单独和共同过量表达MAWD与MAWBP,采用免疫荧光检测MAWD和MAWBP在细胞中的定位,采用western blot检测EMT相关标志蛋白E-cadherin、N-cadherin和Snail在细胞中的表达水平.结果显示,成功构建过量表达载体并稳定转染细胞,转染MAWD和MAWBP后,SGC7901细胞形态呈现类似上皮细胞的鹅卵石状,单独转染Vector的细胞则呈现纤维状,MAWD和MAWBP在胞核和胞浆中均有分布,E-cadherin在MAWD和MAWBP共同过量表达细胞中表达明显增强,N-cadherin和Snail则表达减弱.由此可知,MAWD和MAWBP协同抑制胃癌细胞中的EMT.讨论:研究发现MAWD通过Smad7形成复合体加强对TGF-beta通路的抑制,而TGF-beta是诱导EMT的重要细胞因子.MAWBP能与MAWD相互结合,二者共同过量表达时,通过协同作用影响TGF-beta相关的EMT标志性蛋白表达.
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Key words
gastric cancer,MAWD,MAWBP,EMT,TGF-beta
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