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Correlation between Tiam1 expression and epithelial-mesenchymal transition in human colorectal cancer cell lines
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- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 32
- DOI:
- 10.3969/j.issn.1009-3079.2009.32.012
- Key Word:
- Tiam1基因;上皮-间质转化;大肠癌
Abstract： 目的:探讨Tiaml和EMT在不同转移能力的大肠癌细胞中的关系.方法:用Real time-RT PCR法分析Tiaml mRNA,Ecadherin mRNA和Vimentin mRNA在6种大肠癌细胞系中的表达:通过免疫组织化学检测Tiaml,Ecadherin和Vimentin在LoVo和HT29中的表达.通过考马斯亮蓝染色观察LoVo和HT29的细胞骨架.结果:在SW620,SW480/M5,HT29,LoVo和LS174T中,Tiam1 mRNA的表达水平分别是SW480的0,51,7,67,0,00,0,36,0,06倍,差异具有统计学意义(P<0.05);Ecadherin mRNA的表达水平分别是SW480的3.18,2.27,5.92,0.00,0.61倍,差异具有统计学意义(P<0.05);Vimentin mRNA的表达水平分别是SW480的6.08,0.02,0.35,11.72,0.00倍,差异具有统计学意义(P<0.05).细胞免疫组织化学显示LoVo细胞的Tiaml表达呈阳性(++),Vimentin表达呈强阳性(+++),Ecadherin表达阴性(-);HT29细胞的Ecadaerin表达呈阳性(++),Tiaml和Vimentin表达阴性(-).LoVo细胞质中丝网状的骨架蛋白结构及点状肌动蛋白小体比HT29多.结论:Tiam促进大肠癌转移的机制可能与EMT发生有关.
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