Rare protein-altering variants in ANGPTL7 lower intraocular pressure and protect against glaucoma
Tuomo T. J. Kiiskinen,
Joni A. Turunen,
Aki S Havulinna,
Manuel A Rivas
Posted 26 Jun 2019
bioRxiv DOI: 10.1101/677443 (published DOI: 10.1371/journal.pgen.1008682)
Posted 26 Jun 2019
Protein-altering variants that are protective against human disease provide in vivo validation of therapeutic targets. Here we use genotyping data in UK Biobank and FinnGen to conduct a search for protein-altering variants conferring lower intraocular pressure (IOP) and protection against glaucoma. Through protein-altering variant association analysis we find a missense variant in UK Biobank (rs28991009 (MAF=0.8%) genotyped in 81,527 individuals with measured IOP and an independent set of 4,269 glaucoma patients and 251,355 controls) that significantly lowers IOP (β = −0.73 mmHg for heterozygotes, −2.96 mmHg for homozygotes, P = 1 × 10−13) and is associated with 34% reduced risk of glaucoma ( P = 0.005). In FinnGen, we identify an ANGPTL7 missense variant at a greater than 50-fold increased frequency in Finland compared with other populations (rs147660927, p.Arg220Cys, MAF Finland = 4.1%), which was genotyped in 5,177 glaucoma patients and 130,461 controls and is associated with 30% lower glaucoma risk ( P = 1 × 10−9). We further find three rarer variants in UK Biobank, including a protein-truncating variant, which confer a strong composite lowering of IOP ( P = 0.002), suggesting the protective mechanism likely resides in the loss of an interaction or function. Our results support inhibition or down-regulation of ANGPTL7 as a therapeutic strategy for glaucoma
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