ERCC6 plays a promoting role in the progression of non-small cell lung cancer

Although excision repair cross-complementing group 6 (ERCC6) has been reported to be associated with lung cancer risk, the specific roles of ERCC6 in non-small cell lung cancer (NSCLC) progression are inadequately studied. Thus, this study aimed to examine the potential functions of ERCC6 in NSCLC. The expression of ERCC6 in NSCLC was analyzed by immunohistochemical staining and quantitative PCR. Celigo cell count, colony formation, flow cytometry, wound-healing, and transwell assays were used to evaluate the effects of ERCC6 knockdown on the proliferation, apoptosis, and migration of NSCLC cells. The effect of ERCC6 knockdown on tumor-forming ability of NSCLC cells was estimated by establishing xenograft model. ERCC6 was highly expressed in NSCLC tumor tissues and cell lines, and high ERCC6 expression was significantly associated with poor overall survival. Additionally, ERCC6 knockdown significantly suppressed cell proliferation, colony formation and migration, while accelerated cell apoptosis of NSCLC cells in vitro. Moreover, ERCC6 knockdown inhibited tumor growth in vivo. Further studies verified that ERCC6 knockdown attenuated the expression levels of Bcl-w, CCND1, and c-Myc. Altogether, these data unveil a major role of ERCC6 in the progression of NSCLC, and ERCC6 is expected to become a novel therapeutic target for NSCLC treatment.

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