MiRNA-146ars2910164 Confers a Susceptibility to Digestive System Cancer: A Meta-Analysis Involving 59,098 Subjects

Background MicroRNA(miR)-146amight participate in the occurrence of malignant tumor. The aim of the current investigation was to evaluate the relationship ofmicroRNA-146a(miR-146a) rs2910164 C > G locus to the development of digestive system cancer (DSC). Methods We retrieved publications from PubMed, China Biology Medicine and EMBASE databases up to August 29, 2019. Finally, 56 independent case-control studies with 59,098 participants were included. The strength of the relationship between rs2910164 locus and a risk of DSC was assessed. The power value was also calculated in this study. Results We identified a correlation of rs2910164 locus inmiR-146awith DSC development in dominant model (P= .035; power value = 0.994).MiR-146ars2910164 locus was also identified to be correlated with a risk of DSC in Asians (GG/CG vs. CC:P= .033; power value = 0.989). Sensitivity analysis revealed that any individual study could not alter the final decision. In our study, no significant bias was found among these included studies (P> .1). The results of heterogeneity analysis suggested that small sample size (<1000 subjects), colorectal carcinoma, Asians, gastric carcinoma, esophageal squamous cell carcinoma, hepatocellular cancer, hospital-based study and high-quality score (>= 7.0) subgroups contributed the heterogeneity to our findings. Galbraith radial plot determined that eleven outliers contributed to the main heterogeneity. Conclusion In summary, this meta-analysis highlights that rs2910164 locus might be implicated in the risk of DSC. More studies are, therefore, needed to confirm our results.