@article {10444, title = {Genome-wide association meta-analysis highlights light-induced signaling as a driver for refractive error.}, journal = {Nat Genet}, volume = {50}, year = {2018}, month = {2018 Jun}, pages = {834-848}, abstract = {

Refractive errors, including myopia, are the most frequent eye disorders worldwide and an increasingly common cause of blindness. This genome-wide association meta-analysis in 160,420 participants and replication in 95,505 participants increased the number of established independent signals from 37 to 161 and showed high genetic correlation between Europeans and Asians (>0.78). Expression experiments and comprehensive in silico analyses identified retinal cell physiology and light processing as prominent mechanisms, and also identified functional contributions to refractive-error development in all cell types of the neurosensory retina, retinal pigment epithelium, vascular endothelium and extracellular matrix. Newly identified genes implicate novel mechanisms such as rod-and-cone bipolar synaptic neurotransmission, anterior-segment morphology and angiogenesis. Thirty-one loci resided in or near regions transcribing small RNAs, thus suggesting a role for post-transcriptional regulation. Our results support the notion that refractive errors are caused by a light-dependent retina-to-sclera signaling cascade and delineate potential pathobiological molecular drivers.

}, issn = {1546-1718}, doi = {10.1038/s41588-018-0127-7}, author = {Tedja, Milly S and Wojciechowski, Robert and Hysi, Pirro G and Eriksson, Nicholas and Furlotte, Nicholas A and Verhoeven, Virginie J M and Iglesias, Adriana I and Meester-Smoor, Magda A and Tompson, Stuart W and Fan, Qiao and Khawaja, Anthony P and Cheng, Ching-Yu and H{\"o}hn, Ren{\'e} and Yamashiro, Kenji and Wenocur, Adam and Grazal, Clare and Haller, Toomas and Metspalu, Andres and Wedenoja, Juho and Jonas, Jost B and Wang, Ya Xing and Xie, Jing and Mitchell, Paul and Foster, Paul J and Klein, Barbara E K and Klein, Ronald and Paterson, Andrew D and Hosseini, S Mohsen and Shah, Rupal L and Williams, Cathy and Teo, Yik Ying and Tham, Yih Chung and Gupta, Preeti and Zhao, Wanting and Shi, Yuan and Saw, Woei-Yuh and Tai, E-Shyong and Sim, Xue Ling and Huffman, Jennifer E and Polasek, Ozren and Hayward, Caroline and Bencic, Goran and Rudan, Igor and Wilson, James F and Joshi, Peter K and Tsujikawa, Akitaka and Matsuda, Fumihiko and Whisenhunt, Kristina N and Zeller, Tanja and van der Spek, Peter J and Haak, Roxanna and Meijers-Heijboer, Hanne and van Leeuwen, Elisabeth M and Iyengar, Sudha K and Lass, Jonathan H and Hofman, Albert and Rivadeneira, Fernando and Uitterlinden, Andr{\'e} G and Vingerling, Johannes R and Lehtim{\"a}ki, Terho and Raitakari, Olli T and Biino, Ginevra and Concas, Maria Pina and Schwantes-An, Tae-Hwi and Igo, Robert P and Cuellar-Partida, Gabriel and Martin, Nicholas G and Craig, Jamie E and Gharahkhani, Puya and Williams, Katie M and Nag, Abhishek and Rahi, Jugnoo S and Cumberland, Phillippa M and Delcourt, C{\'e}cile and Bellenguez, C{\'e}line and Ried, Janina S and Bergen, Arthur A and Meitinger, Thomas and Gieger, Christian and Wong, Tien Yin and Hewitt, Alex W and Mackey, David A and Simpson, Claire L and Pfeiffer, Norbert and P{\"a}rssinen, Olavi and Baird, Paul N and Vitart, Veronique and Amin, Najaf and van Duijn, Cornelia M and Bailey-Wilson, Joan E and Young, Terri L and Saw, Seang-Mei and Stambolian, Dwight and MacGregor, Stuart and Guggenheim, Jeremy A and Tung, Joyce Y and Hammond, Christopher J and Klaver, Caroline C W} } @article {10426, title = {A genome-wide association study of corneal astigmatism: The CREAM Consortium.}, journal = {Mol Vis}, volume = {24}, year = {2018}, month = {2018}, pages = {127-142}, abstract = {

Purpose: To identify genes and genetic markers associated with corneal astigmatism.

Methods: A meta-analysis of genome-wide association studies (GWASs) of corneal astigmatism undertaken for 14 European ancestry (n=22,250) and 8 Asian ancestry (n=9,120) cohorts was performed by the Consortium for Refractive Error and Myopia. Cases were defined as having >0.75 diopters of corneal astigmatism. Subsequent gene-based and gene-set analyses of the meta-analyzed results of European ancestry cohorts were performed using VEGAS2 and MAGMA software. Additionally, estimates of single nucleotide polymorphism (SNP)-based heritability for corneal and refractive astigmatism and the spherical equivalent were calculated for Europeans using LD score regression.

Results: The meta-analysis of all cohorts identified a genome-wide significant locus near the platelet-derived growth factor receptor alpha () gene: top SNP: rs7673984, odds ratio=1.12 (95\% CI:1.08-1.16), p=5.55{\texttimes}10. No other genome-wide significant loci were identified in the combined analysis or European/Asian ancestry-specific analyses. Gene-based analysis identified three novel candidate genes for corneal astigmatism in Europeans-claudin-7 (), acid phosphatase 2, lysosomal (), and TNF alpha-induced protein 8 like 3 ().

Conclusions: In addition to replicating a previously identified genome-wide significant locus for corneal astigmatism near the gene, gene-based analysis identified three novel candidate genes, , , and , that warrant further investigation to understand their role in the pathogenesis of corneal astigmatism. The much lower number of genetic variants and genes demonstrating an association with corneal astigmatism compared to published spherical equivalent GWAS analyses suggest a greater influence of rare genetic variants, non-additive genetic effects, or environmental factors in the development of astigmatism.

}, keywords = {Acid Phosphatase, Asian Continental Ancestry Group, Astigmatism, Claudins, Cohort Studies, Cornea, Corneal Diseases, European Continental Ancestry Group, Gene Expression, Genetic Predisposition to Disease, Genome-Wide Association Study, Humans, Intracellular Signaling Peptides and Proteins, Odds Ratio, Polymorphism, Single Nucleotide, Receptor, Platelet-Derived Growth Factor alpha, Software}, issn = {1090-0535}, author = {Shah, Rupal L and Li, Qing and Zhao, Wanting and Tedja, Milly S and Tideman, J Willem L and Khawaja, Anthony P and Fan, Qiao and Yazar, Seyhan and Williams, Katie M and Verhoeven, Virginie J M and Xie, Jing and Wang, Ya Xing and Hess, Moritz and Nickels, Stefan and Lackner, Karl J and P{\"a}rssinen, Olavi and Wedenoja, Juho and Biino, Ginevra and Concas, Maria Pina and Uitterlinden, Andr{\'e} and Rivadeneira, Fernando and Jaddoe, Vincent W V and Hysi, Pirro G and Sim, Xueling and Tan, Nicholas and Tham, Yih-Chung and Sensaki, Sonoko and Hofman, Albert and Vingerling, Johannes R and Jonas, Jost B and Mitchell, Paul and Hammond, Christopher J and H{\"o}hn, Ren{\'e} and Baird, Paul N and Wong, Tien-Yin and Cheng, Chinfsg-Yu and Teo, Yik Ying and Mackey, David A and Williams, Cathy and Saw, Seang-Mei and Klaver, Caroline C W and Guggenheim, Jeremy A and Bailey-Wilson, Joan E} }