Protective coding variants in CFH and PELI3 and a variant near CTRB1 are associated with age-related macular degeneration†.

Hum Mol Genet
Authors
Abstract

Although numerous common age-related macular degeneration (AMD) alleles have been discovered using genome-wide association studies, substantial disease heritability remains unexplained. We sought to identify additional common and rare variants associated with advanced AMD. A total of 4,332 cases and 25,268 controls of European ancestry from three different populations were genotyped using the Illumina Infinium HumanExome BeadChip. We performed meta-analyses to identify associations with common variants, and single variant and gene-based burden tests to identify rare variants. Two protective, low-frequency, non-synonymous variants were significantly associated with a decrease in AMD risk: A307V in PELI3 (odds ratio [OR] = 0.14, P = 4.3 × 10(-10)) and N1050Y in CFH (OR = 0.76, P = 6.2 × 10(-12)). The new variants have a large effect size, similar to some rare mutations we reported previously in a targeted sequencing study, which remain significant in this analysis: CFH R1210C (OR = 18.82, P = 3.5 × 10(-07)), C3 K155Q (OR = 3.27, P = 1.5 × 10(-10)) and C9 P167S (OR = 2.04, P = 2.8 × 10(-07)). We also identified a strong protective signal for a common variant (rs8056814) near CTRB1 associated with a decrease in AMD risk (logistic regression: OR = 0.71, P = 1.8 × 10(-07)). Suggestive protective loci were identified in the COL4A3 and APOH genes. Our results support the involvement of common and low-frequency protective variants in this vision-threatening condition. This study expands the roles of the innate immune pathway as well as the extracellular matrix and high-density lipoprotein pathways in the aetiology of AMD.

Year of Publication
2016
Journal
Hum Mol Genet
Date Published
2016 Dec 22
ISSN
1460-2083
DOI
10.1093/hmg/ddw336
PubMed ID
28011711
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