基础医学与临床 ›› 2013, Vol. 33 ›› Issue (8): 998-1003.

• 研究论文 • 上一篇    下一篇

肝星状细胞通过SDF-1/CXCR4轴诱导肝癌细胞上皮间质转分化并促进其侵袭

李四光1,常远鸿2,刘凯歌3   

  1. 1. 西安医学院临床医学院
    2. 西安市第四医院
    3. 西安医学院附属医院
  • 收稿日期:2012-09-05 修回日期:2012-10-29 出版日期:2013-08-05 发布日期:2013-07-18
  • 通讯作者: 李四光 E-mail:lsg0916@sina.com
  • 基金资助:
    陕西省教育厅专项科研计划项目

Hepatic stellate cell through SDF-1/CXCR4 axis induces epithelial–mesenchymal transition in hepatocellular carcinoma invasion

  • Received:2012-09-05 Revised:2012-10-29 Online:2013-08-05 Published:2013-07-18

摘要: 目的 探讨肝星状细胞是否通过SDF-1/CXCR4轴促进肝癌细胞侵袭的作用和可能机制。方法 通过Western blot 和Real time RT-PCR,检测肝星状细胞LX02和肝癌细胞系SDF-1、CXCR4表达。Transwell实验检测星状细胞LX02或外源性SDF-1干预对肝癌细胞HepG2以及CXCR4基因沉默后的HepG2侵袭的影响,Western blot 检测上皮标志E-Cadherin和间质标志vimentin的表达变化。结果 肝星状细胞LX02中趋化因子SDF-1高表达,4株人肝细胞癌细胞系均有CXCR4高表达,其中HepG2细胞表达最强。星状细胞或SDF-1均能诱导肝癌细胞上皮-间质分化并促进其侵袭。通过RNA干扰技术靶向沉默肝癌细胞CXCR4基因,星状细胞或SDF-1均不能增强其细胞侵袭能力,不能诱导肝癌细胞HepG2发生上皮-间质分化。结论 肝星状细胞通过趋化因子SDF-1/CXCR4轴促进肝癌细胞侵袭,其机制可能与诱导肝癌上皮-间质转化有关。

关键词: 肝癌, 侵袭, 肿瘤, CXCR4, 肝星状细胞。

Abstract: Objective Recent studies have shown that hepatic stellate cell in tumor microenviroment is an important regulator for hepatocellular carcinoma cell behavior. The aim of this study is to explore the impact of hepatic stellate cell in hepatocellular carcinoma invasion through SDF-1/CXCR4 axis. Methods The expressions of SDF-1 and CXCR4 were examined in hepatic stellate cell LX02, four hepatocellular carcinoma cell lines by Western blotting at protein levels and Real-time RT-PCR at mRNA level respectively. In addition, Transwell invasion assay was carried out to analyze the influence of hepatic stellate cell LX02 and SDF-1 on invasion of hepatocellular carcinoma cell HepG2 under normal condition or CXCR4 gene silence condition. Then, Western blotting was performed to evaluate the expression of epithelial mark E-Cadherin and mesenchymal mark vimentin. Results The expression of SDF-1 was high in hepatic stellate cell LX02, and increased levels of expression of CXCR4 were found in all hepatocellular carcinoma cells. Co-culture with hepatic stellate cell LX02 or treatment with SDF-1 both induced the epithelial–mesenchymal transition and increased the invasion of hepatocellular carcinoma cell HepG2. Furthermore, inhibition of CXCR4 by gene silence in HepG2 suppressed the enhanced invasion and epithelial–mesenchymal transition of HepG2 cells which induced by stellate cells or SDF-1. Conclusion Hepatic stellate cells promote hepatocellular carcinoma cell invasion through chemokine SDF-1/CXCR4 axis, the mechanism may involve the epithelial-mesenchymal transition of carcinoma cell.

Key words: hepatocellular carcinoma, invasion, carcinoma, CXCR4, stellate cell.

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