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CXCL5 regulation of proliferation and migration in human non-small cell lung cancer cells.
Epithelial neutrophil-activating peptide-78 (CXCL5), a member of the subgroup of CXC-type chemokine family, is an inflammatory factor involved in the progression of lung cancer, but the underlying mechanism remains unclear. In this study, we investigated the effects of CXCL5 on proliferation and migration in non-small cell lung cancer (NSCLC) using tissue microarrays from NSCLC patients and H460 cells transfected with a CXCL5-interfered lentivirus vector or stimulated with recombinant CXCL5. We observed that the expression of CXCL5 was significantly higher in lung cancer cell lines, and high CXCL5 was associated with high chemokine (C-X-C motif) receptor 2 expression and was significantly associated with poor differentiation. The high expression of CXCL5 was associated with poor NSCLC prognosis and was an independent predictive factor. Furthermore, downregulation of CXCL5 in H460 cells significantly reduced proliferation and migration. Recombinant CXCL5 promoted H460 cell proliferation and movement by activating MAPK/ERK1/2 and PI3K/AKT signaling. Our study elucidates the important role of CXCL5 in the progression and prognosis of NSCLC. These findings suggested that CXCL5 might be a potential biomarker and novel therapeutic target for lung cancer.
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