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. 2018 Feb 15;8(1):3124.
doi: 10.1038/s41598-018-20435-9.

Analysis combining correlated glaucoma traits identifies five new risk loci for open-angle glaucoma

Collaborators, Affiliations

Analysis combining correlated glaucoma traits identifies five new risk loci for open-angle glaucoma

Puya Gharahkhani et al. Sci Rep. .

Abstract

Open-angle glaucoma (OAG) is a major cause of blindness worldwide. To identify new risk loci for OAG, we performed a genome-wide association study in 3,071 OAG cases and 6,750 unscreened controls, and meta-analysed the results with GWAS data for intraocular pressure (IOP) and optic disc parameters (the overall meta-analysis sample size varying between 32,000 to 48,000 participants), which are glaucoma-related traits. We identified and independently validated four novel genome-wide significant associations within or near MYOF and CYP26A1, LINC02052 and CRYGS, LMX1B, and LMO7 using single variant tests, one additional locus (C9) using gene-based tests, and two genetic pathways - "response to fluid shear stress" and "abnormal retina morphology" - in pathway-based tests. Interestingly, some of the new risk loci contribute to risk of other genetically-correlated eye diseases including myopia and age-related macular degeneration. To our knowledge, this study is the first integrative study to combine genetic data from OAG and its correlated traits to identify new risk variants and genetic pathways, highlighting the future potential of combining genetic data from genetically-correlated eye traits for the purpose of gene discovery and mapping.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Regional plots for the new risk loci identified in single variant analyses in this study. The most significantly associated SNPs in each region are marked as solid purple diamonds. Pairwise correlations (LD r2) between the top SNP and the other SNPs in a 400 kb flanking region are illustrated by different colours. Blue spikes show estimated recombination rates. (a) rs72815193 on chromosome 10 near MYOF, CYP26A1, and CYP26C (the most significant results were obtained in combined OAG and VCDR analysis conducted in combined Asians and European ancestry). (b) rs56962872 on chromosome 3 within LOC253573 (LINC02052), near CRYGS and TBCCD1 (the most significant results were obtained in combined OAG and VCDR analysis conducted in European ancestry). (c) rs6478746 on chromosome nine near LMX1B (the most significant results were obtained in combined OAG and CA in European ancestry). (d) rs9530458 on chromosome 13 within LMO7 (combined OAG data from ANZRAG and NEIGHBORHOOD). cM = centimorgan.

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