An integrated clinical morphology and functional genomics approach reveals upregulation of PLEKHA7 and C10orf53 in iris contributes to primary angle closure glaucoma [RNA-seq]

Previous Genome-wide association studies (GWASs) have identified susceptibility loci of primary angle closure glaucoma (PACG), but applicating these findings is difficult. Although shallow anterior chamber depth (ACD) and short axial length (AL) are characteristic phenotypes of PACG, current GWAS variants do not show any correlation with these features, calling for the identification of more risk factors . Here, thicker and enlarged iris was identified as a significant independent risk factors. By employing allelic-specific STARR-seq and assay for transposase-accessible chromatin using sequencing (ATAC-seq), we screened disease-related variants in linkage disequilibrium and identified 2 causative variants in iris. Alterations in these variants may contribute to the pathogenic iris phenotype by upregulating the expression of PLEKHA7 and C10orf53, potentially regulating PACG development and progression. Our efforts nominate the important role of iris and identify pathogenic SNP-target gene interactions for PACG, providing a potentially powerful approach for interpreting noncoding variation of diseases. Overall design: We conducted allelic-specific STARR-seq for PACG candidate variants and ATAC-seq for ARPE-19 cell lines and human iris.