Genome-wide association study for refractive astigmatism reveals genetic co-determination with spherical equivalent refractive error: the CREAM consortium

Q Li, R Wojciechowski, CL Simpson, PG Hysi, Virginie Verhoeven, MK Ikram, R Hohn, V Vitart, AW Hewitt, K Oexle, KM Makela, S Macgregor, M Pirastu, Q Fan, CY (Ching-Yu) Cheng, B St Pourcain, G McMahon, JP Kemp, K Northstone, JS RahiPM Cumberland, NG Martin, PG Sanfilippo, Y (Yi) Lu, YX Wang, C Hayward, O Polasek, H Campbell, G Bencic, AF Wright, J Wedenoja, T Zeller, A Schillert, A Mirshahi, K Lackner, SP Yip, MKH Yap, JS Ried, C Gieger, F Murgia, JF Wilson, B Fleck, S Yazar, Hans Vingerling, Bert Hofman, André Uitterlinden, Fernando Rivadeneira, Najaf Amin, L Karssen, Ben Oostra, X Zhou, YY Teo, ES Tai, E Vithana, V Barathi, YF Zheng, RG Siantar, K Neelam, YC Shin, J (Jan) Lam, E Yonova-Doing, C Venturini, SM Hosseini, HS Wong, T Lehtimaki, M Kahonen, O Raitakari, NJ Timpson, DM Evans, CC Khor, T Aung, TL Young, P Mitchell, B Klein, Cornelia Duijn, T Meitinger, JB Jonas, PN Baird, DA Mackey, TY Wong, SM Saw, O Parssinen, D Stambolian, CJ Hammond, Caroline Klaver, C Williams, AD Paterson, JE Bailey-Wilson, JA Guggenheim

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Abstract

To identify genetic variants associated with refractive astigmatism in the general population, meta-analyses of genome-wide association studies were performed for: White Europeans aged at least 25 years (20 cohorts, N = 31,968); Asian subjects aged at least 25 years (7 cohorts, N = 9,295); White Europeans aged < 25 years (4 cohorts, N = 5,640); and all independent individuals from the above three samples combined with a sample of Chinese subjects aged < 25 years (N = 45,931). Participants were classified as cases with refractive astigmatism if the average cylinder power in their two eyes was at least 1.00 diopter and as controls otherwise. Genome-wide association analysis was carried out for each cohort separately using logistic regression. Meta-analysis was conducted using a fixed effects model. In the older European group the most strongly associated marker was downstream of the neurexin-1 (NRXN1) gene (rs1401327, P = 3.92E-8). No other region reached genome-wide significance, and association signals were lower for the younger European group and Asian group. In the meta-analysis of all cohorts, no marker reached genome-wide significance: The most strongly associated regions were, NRXN1 (rs1401327, P = 2.93E-07), TOX (rs7823467, P = 3.47E-07) and LINC00340 (rs12212674, P = 1.49E-06). For 34 markers identified in prior GWAS for spherical equivalent refractive error, the beta coefficients for genotype versus spherical equivalent, and genotype versus refractive astigmatism, were highly correlated (r = -0.59, P = 2.10E-04). This work revealed no consistent or strong genetic signals for refractive astigmatism; however, the TOX gene region previously identified in GWAS for spherical equivalent refractive error was the second most strongly associated region. Analysis of additional markers provided evidence supporting widespread genetic co-susceptibility for spherical and astigmatic refractive errors.
Original languageUndefined/Unknown
Pages (from-to)131-146
Number of pages16
JournalHuman Genetics
Volume134
Issue number2
DOIs
Publication statusPublished - 2015

Research programs

  • EMC MGC-02-96-01
  • EMC MM-01-39-09-A
  • EMC NIHES-01-64-01
  • EMC OR-01-60-01

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