已发表论文

非小细胞肺癌中钙粘蛋白的临床病理意义及潜在药物目标

 

Authors Wang Z, Wang B, Guo H, Shi G, Hong X

Published Date December 2014 Volume 2015:9 Pages 207—216

DOI http://dx.doi.org/10.2147/DDDT.S74259

Received 13 September 2014, Accepted 13 October 2014, Published 19 December 2014

Background: Previous studies demonstrate that T-cadherin is a candidate tumor suppressor in several types of human tumors, including non-small cell lung cancer (NSCLC). Lack of protein expression of T-cadherin  by hypermethylation has been found to play an important role in lung alveolar differentiation regulation and epithelial tumorigenesis. However, the correlation between T-cadherin  hypermethylation and clinicopathological characteristics of NSCLC remains unclear. Here we conducted a systematic review and meta-analysis to quantitatively evaluate the effects of T-cadherin  hypermethylation on the incidence of NSCLC and clinicopathological characteristics.
Methods: A detailed literature search was carried out for related research publications. Analyses of pooled data were performed. Odds ratio (OR) and hazard ratio (HR) were calculated and summarized, respectively.
Results: Final analysis of 1,172 NSCLC patients from 15 eligible studies was performed. T-cadherin  hypermethylation was observed to be significantly higher in NSCLC than in normal lung tissue, based on the pooled OR from nine studies including 532 NSCLC and 372 normal lung tissue samples (OR=8.19, 95% confidence interval [CI]=5.41–12.39, <0.00001). T-cadherin  hypermethylation may also be associated with pathological types. The pooled OR was obtained from four studies including 111patients with squamous cell carcinoma and 106 with adenocarcinoma (OR=0.35, 95% CI=0.19–0.66, =0.001), which indicated that T-cadherin  hypermethylation plays a more important role in the pathogenesis of adenocarcinoma. We did not find that T-cadherin  hypermethylation was correlated with the sex or smoking status, clinical stages, or epidermal growth factor receptor (EGFR) mutation status. However, T-cadherin  hypermethylation was found to be significantly higher in poorly differentiated NSCLC than in moderately and highly differentiated NSCLC, and NSCLC patients with T-cadherin hypermethylation had a lower survival rate than those without T-cadherin  hypermethylation.
Conclusion: The results of this meta-analysis suggest that T-cadherin  hypermethylation is associated with an increased risk and worse survival in NSCLC. T-cadherin  hypermethylation, which induces the inactivation of T-cadherin  gene, plays an important role in the carcinogenesis, cancer progression, as well as clinical outcome.
Keywords: methylation, lung cancer, meta-analysis, EGFR, odds ratio, hazard ratio