实用肿瘤学杂志 ›› 2014, Vol. 28 ›› Issue (4): 310-314.doi: 10.11904/j.issn.1002-3070.2014.04.005

• 论著 • 上一篇    下一篇

STAT3通过上调Twist基因表达从而诱导肺腺癌细胞上皮-间质转化

李志伟 王凤云 张倩倩 李丁楠 张纯慧 燕飞虎 张艳桥   

  1. 哈尔滨医科大学附属肿瘤医院内科 (哈尔滨 150081)
  • 出版日期:2014-08-28 发布日期:2014-07-31
  • 作者简介:李志伟,男,(1973-),博士,副主任医师,从事肿瘤内科治疗和研究工作的研究

STAT3 promote lung adenocarcinoma EMT by up-regulating Twist expressing

LI Zhiwei, WANG Fengyun, ZHANG Qianqian, LI Dingnan, ZHANG Chunhui, YAN Feihu, ZHANG Yanqiao   

  1. 1Department of Gastrointestinal Medical Oncology, The Tumor Hospital of Harbin Medical University, Harbin 150081, China
  • Online:2014-08-28 Published:2014-07-31

摘要: 目的 探讨信号转导子与转录激活子3(STAT3)基因在肺腺癌细胞上皮-间质转化(Epithelial-mesenchymal transition,EMT)过程中的作用。方法 应用STAT3-siRNA转染人肺腺癌A549细胞,下调STAT3基因表达。转染后观察细胞形态学变化,通过Western blot检测STAT3和Twist蛋白的表达变化。同时应用Transwell法和划痕实验检测细胞的侵袭和迁移能力。并应用免疫组化法验证STAT3和Twist蛋白在肺腺癌组织中表达的相关性。结果STAT3-siRNA转染人肺腺癌A549细胞后,STAT3基因表达下降,同时降低Twist的表达,并且降低肺癌细胞的增殖、侵袭和迁移能力, 在肺腺癌组织中我们也观察到到随着分化程度升高,两个蛋白在肺癌组织中的的表达均逐渐降低,并呈正相关。结论 STAT3基因通过调节Twist的表达,参与EMT过程,从而在肺癌进展中发挥重要作用。

关键词: 肺腺癌, 转导子与转录激活子3, Twist, 上皮-间质转化

Abstract: ObjectiveTo study effects of signal transducer and activator of transcription 3 (STAT3) gene on lung adenocarcinoma cells EMT. Methods We observed morphological changes of the cells and detected the expression of STAT3 and Twist by western blot after STAT3-SiRNA plasmid was transfected into A549 cells. Meanwhile, we observed invasion and migration ability of A549 cells using transwell method and wound healing assay. Eventually, we verified the correlation between STAT3 and Twist expression in lung adenocarcinoma tissues by immunohistochemical method. Results Si-STAT3 significantly down-regulated the expression of STAT3 in A549 cells, and pronouncedly inhibited migration and invasion of A549 cells in vitro. Meanwhile, we also found decreased expression of Twist. The expression of STAT3 was positively correlated with the expression of Twist in lung adenocarcinoma tissue specimens and the expression of two genes was reversely correlated with tissue differentiation degree. Conclusion The STAT3 participated in the process of EMT by regulating twist expression, which played a vital role in progression of lung adenocarcinoma.

Key words: Lung adenocarcinoma, STAT3, Twist, EMT

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