期刊
PATHOLOGY RESEARCH AND PRACTICE
卷 210, 期 8, 页码 514-520出版社
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.prp.2014.04.010
关键词
Caveolin-1; Large cell lung carcinoma; EGFR; MMP2; MMP9
类别
资金
- National Natural Science Foundation of China [81201838]
Purpose: This study investigated the relationships of caveolin-1 expression with clinical pathologic parameters and the prognosis of patients with large cell lung carcinoma. This study also explored the roles of caveolin-1 in cell invasiveness, matrix metalloproteinase (MMP) expression, and non-small cell lung carcinoma activity in vitro. Methods: A total of 120 tissue samples were immunohistochemically analyzed for caveolin-1 expression. Cell invasion ability was measured by a Transwell invasion assay. Protein expression was assessed by Western blotting. MMP activity was detected by gelatin zymography. Results: Caveolin-1 was expressed in 54 of 120 (45.0%) cases of large cell lung carcinoma. Caveolin-1 expression was significantly correlated with node status (NO vs. N1, N2, and N3; P = 0.005) and advanced pTNM stage (Stages I and II vs. Stage III, P < 0.001). Patients with caveolin-l-positive expression had a poorer prognosis than did those with caveolin-1-negative expression (P < 0.001). The knockdown of caveolin-1 in H460 and 95D cells reduced the invasive ability of the cells and the expression of phosphorylated epidermal growth factor receptor (EGFR), phospho-extracellular signal-regulated kinases 1 and 2, MMP2, and MMP9; the protein level and activity of MMP2 and MMP9 were also decreased by the inhibition of EGFR activity in H460 and 95D cells. Conclusions: The expression of caveolin-1 was positively correlated with an advanced pathologic stage. Thus, caveolin-1 could act as a predictor of a poor prognosis in patients with large cell lung carcinoma. In addition, the downregulation of caveolin-1 reduced both the invasive ability of tumor cells and the protein and activity levels of MMP2 and MMP9 in vitro, suggesting the involvement of EGFR/MMP signaling in this process. (C) 2014 Elsevier GmbH. All rights reserved.
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