Abstract:
:IL-17, which exerts strong pro-inflammatory effects, has emerged as an important mediator in inflammation-associated cancer. However, the characteristics of IL-17-producing cells, the relevance of IL-17 to clinical parameters and its function in the development and progression of colorectal carcinoma still remain to be explored. In the present study, we first found the levels of IL-17 producing cells were significantly increased in the tumor regions of samples from colorectal carcinoma patients compared with non-tumor regions. Confocal microscopic analysis showed co-staining of IL-17 with CD4 and CD68, indicating IL-17 in colorectal carcinoma was expressed by macrophage and Th17. High expression of IL-17 was associated with high microvessel density. Univariate and multivariate analysis revealed that IL-17 was an independent prognostic factor for overall survival. To explore the underlying mechanisms of IL-17 in angiogenesis, we used PCR-array to find pro-angiogenic factor in cancer cells specifically induced by IL-17, then validated VEGF as one of factors in IL-17-mediated angiogenesis with the use of quantitative RT-PCR, ELISA and VEGF immunohistochemistry. Our results propose IL-17 as a novel indicator of prognosis in the patients with colorectal carcinoma and could serve as a novel therapeutic target for colorectal carcinoma, furthermore our results indicate that IL-17 producing cells may facilitate development of colorectal carcinoma by fostering angiogenesis via promote VEGF production from cancer cells.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Liu J,Duan Y,Cheng X,Chen X,Xie W,Long H,Lin Z,Zhu Bdoi
10.1016/j.bbrc.2011.03.021subject
Has Abstractpub_date
2011-04-08 00:00:00pages
348-54issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(11)00393-7journal_volume
407pub_type
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