Macrophage-secreted IL-8 induces-epithelial-mesenchymal transition in hepatocellular carcinoma cells by activating the JAK2/STAT3/Snail pathway

被引:232
作者
Fu, Xiu-Tao [1 ,2 ]
Dai, Zhi [1 ,2 ]
Song, Kang [1 ,2 ]
Zhang, Zhuo-Jun [2 ]
Zhou, Zheng-Jun [1 ,2 ]
Zhou, Shao-Lai [1 ,2 ]
Zhao, Yi-Ming [1 ,2 ]
Xiao, Yong-Sheng [1 ]
Sun, Qi-Man [1 ]
Ding, Zhen-Bin [1 ]
Fan, Jia [1 ,2 ,3 ]
机构
[1] Fudan Univ, Minist Educ, Key Lab Carcinogenesis & Canc Invas, Liver Canc Inst,Zhongshan Hosp, Shanghai 200032, Peoples R China
[2] Fudan Univ, Zhongshan Hosp, Shanghai Key Lab Organ Transplantat, Shanghai 200032, Peoples R China
[3] Fudan Univ, Inst Biomed Sci, Shanghai 200032, Peoples R China
关键词
hepatocellular carcinoma; CD68; IL-8; epithelial-mesenchymal transition; STAT3; TUMOR-ASSOCIATED MACROPHAGES; NEUTROPHIL CHEMOTACTIC FACTOR; BREAST-CANCER CELLS; INTERLEUKIN-8; EXPRESSION; VENOUS METASTASES; PROSTATE-CANCER; GENE-EXPRESSION; POOR-PROGNOSIS; UP-REGULATION; TNF-ALPHA;
D O I
10.3892/ijo.2014.2761
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Macrophages are a major component of the leukocyte infiltrate of tumors and play a pivotal role in the progression of hepatocellular carcinoma (HCC). However, the molecular mechanisms by which macrophages promote HCC invasion are poorly understood. The present study was undertaken to investigate the relationship between macrophages and epithelial-mesenchymal transition (EMT) of HCC. Double-staining immunohistochemistry was used to observe the association between macrophages and EMT markers in clinical HCC samples and it showed that EMT primarily occurred at the edge of the tumor nest, in which infiltrating macrophages were always observed. This indicated that CD68 which is a marker of macrophages, was correlated with EMT marker levels. In addition, after being cultured with macrophages for 24 h, the ability of HCC cells to migrate and invade increased, Snail and N-Cadherin expression was upregulated, and E-Cadherin was downregulated. An antibody array assay was applied to analyze the supernatant of these cultures and it demonstrated IL-8 increased significantly in the macrophage co-culture system. Finally, the role of macrophage-derived IL-8 in the invasion of HCC cells was assayed, and downstream signaling pathways were also investigated. We found that IL-8: i) may induce EMT and promote HCC cell migration and invasion and ii) is associated with the JAK2/STAT3/Snail signaling pathway. Taking together, these findings revealed that macrophages that have infiltrated tumors may induce epithelial-mesenchymal transition of HCC cells via the IL-8 activated JAK2/STAT3/Snail pathway. Thus, this may offer a potential target for developing new HCC therapies.
引用
收藏
页码:587 / 596
页数:10
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