The D/I Polymorphism in theAngiotensin-ConvertingEnzyme Gene and Chronic Obstructive Pulmonary Disease Risk: A Meta-Analysis

作者：Xiaobo Li, Na Wei, Zhangjun Wu, QI Zhan-zhong, Xin Zhang, Qiuling Chen, Zhiqiang Xia, Shuo Li · 发表于：COPD Journal of Chronic Obstructive Pulmonary Disease · 年份：2012 · DOI：10.3109/15412555.2012.694921 · 被引用次数：6 · 研究领域：Renin-Angiotensin System Studies、Asthma and respiratory diseases、Genetics and Physical Performance

BACKGROUND: The deletion/insertion (D/I) polymorphism in the angiotensin-converting enzyme (ACE) gene has been implicated in susceptibility of chronic obstruction pulmonary disease (COPD), but a number of studies have reported inconclusive results. The aim of this study is to investigate the relationship between the D/I polymorphism in the ACE gene and COPD risk by meta-analysis. METHOD: We searched Pubmed database, Embase database, CNKI database and Wanfang database, covering all studies until October 10, 2011. Statistical analysis was performed by using the software Revman4.2 and STATA 10.0. RESULTS: A total of 710 COPD cases and 862 controls in 10 case-control studies were included in this study. The results suggested that the DD homozygote carriers did not have an increased or decreased risk of COPD when compared with the heterozygote DI and II homozygote carriers. However, in the subgroup analysis by race, significant increased risks were found in Asian DD homozygote carriers (OR = 2.6 and 95% CI = 1.47-4.57 for DD vs. DI+II) but not in Caucasian DD homozygote carriers (OR = 0.91, 95%CI = 0.69-1.22, P = 0.54 for DD vs. DI+II). CONCLUSIONS: This meta-analysis suggested that the ACE gene is a COPD susceptible gene in Asian populations. Future studies are needed to validate our conclusions..