Association between DAPK1 Promoter Methylation and Cervical Cancer: A Meta-Analysis

Jiaqiang Xiong, Ya Li, Kecheng Huang, Meixia Lu, Hao Shi, Lanfang Ma, Aiyue Luo, Shuhong Yang, Zhiyong Lu, Jinjin Zhang, Lilan Yang, Shixuan Wang (+1 others)
2014 PLoS ONE  
Death-associated protein kinase1 (DAPK1) is an important tumor suppressor gene. DNA methylation can inactivate genes, which has often been observed in the carcinogenesis of cervical cancer. During the past several decades, many studies have explored the association between DAPK1 promoter methylation and cervical cancer. However, many studies were limited by the small samples size and the findings were inconsistent among them. Thus, we conducted a metaanalysis to assess the association between
more » ... PK1 promoter methylation and cervical cancer. Methods: We systematically searched eligible studies in the PubMed, Web of Science, EMBASE and CNKI databases. Using meta-regression, subgroup analysis and sensitivity analysis, we explored the potential sources of heterogeneity. The odds ratio (OR) and 95% confidence interval (95% CI) were calculated by Meta-Analysis in R. Results: A total of 15 studies from 2001 to 2012, comprising 818 tumor tissues samples and 671 normal tissues samples, were analyzed in this meta-analysis. The frequencies of DAPK1 promoter methylation ranged from 30.0% to 78.6% (median, 59.3%) in cervical cancer tissue and 0.0% to 46.7% (median, 7.8%) in normal cervical tissue. The pooled OR was 19.66 (95%CI = 8.72-44.31) with the random effects model, and heterogeneity was found through the sensitivity analysis. The I 2 = 60% (P = 0.002) decreased to I 2 = 29.2% (P = 0.144) when one heterogeneous study was excluded, and the pooled OR increased to with the fixed effects model. Conclusion: The results suggested a strong association between DAPK1 promoter methylation and cervical cancer. This study also indicated that DAPK1 promoter methylation may be a biomarker during cervical carcinogenesis that might serve as an early indication of cervical cancer.
doi:10.1371/journal.pone.0107272 pmid:25268905 pmcid:PMC4182030 fatcat:vsgd4df3erdqzlw2fjqyuley4q