Genetic associations in CHAT and COL11A1 with primary angle-closure glaucoma susceptibility: A systematic review and meta-analysis

Genome-wide association studies (GWAS) have identified that single-nucleotide polymorphisms (SNPs) rs1258267 in CHAT and rs3753841 in COL11A1 are associated with primary angle-closure glaucoma (PACG). The purpose of the study was to evaluate the association of CHAT rs1258267 and COL11A1 rs3753841 with PACG. A comprehensive electronic database search was performed to include eligible studies, published from October 2010 to March 2022. By calculating summary odds ratios (ORs) and 95% confidence intervals (CI) under five genetic models, the risk of PACG related to these two SNPs could be estimated. Heterogeneity was measured with a Chi-square-based Q statistic test and the I2 statistic. By the Z test, we analyzed the overall effect of OR. We used funnel plots and Begg's funnel plots to evaluate the publication bias of included studies. The meta-analysis was guided by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 checklist. There were eighteen studies associating CHAT rs1258267 with PACG indicating evidently decreased PACG risk in five genetic models. Thirty studies were included to demonstrate a notable increase in the risk of PACG-carrying COL11A1 rs3753841 genotypes. Subgroup analyses showed that the association of CHAT rs1258267 and COL11A1 rs3753841 with PACG was obvious in Asians, while no evidence was found to confirm this connection in Caucasians. This meta-analysis suggests that CHAT rs1258267 G/A polymorphisms could bring about a decreased risk of PACG susceptibility and COL11A1 rs3753841 G/A polymorphisms could cause an increased risk. These effects mainly manifest in Asians.

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