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Jui-En Lo, Chia-Yi Cheng, Chang-Hao Yang, Chung-May Yang, Yi-Chieh Chen, Yu-Shu Huang, Pei-Lung Chen, Ta-Ching Chen; Genotypes Influence Clinical Progression in EYS-Associated Retinitis Pigmentosa. Trans. Vis. Sci. Tech. 2022;11(7):6. doi: https://doi.org/10.1167/tvst.11.7.6.
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The purpose of this study was to investigate the genetic and clinical characteristics of eyes shut homolog (EYS)-associated retinitis pigmentosa (RP).
This was a retrospective cross-sectional observational study of 36 patients with EYS-associated autosomal recessive RP (arRP).
The gene sequencing results revealed that c.6416G>A (p.Cys2139Tyr) and c.7228+1G>A were the two most predominant variants in our cohort and that variants near the C-terminus, which contains alternating laminin and epidermal growth factor (EGF) domains, accounted for the majority of the allele counts (58 of a total of 72) and relative allele frequencies (81%). Over half of the patients presented with pericentral-type RP (n = 19, 60%), which frequently occurred in combination with macular lesions (n = 10, 52%). Patients having both variants within the alternating laminin and EGF domains near the C-terminus had a more severe disease progression (average 0.045 logMAR increase per year) than those having one variant in the N-terminus and the other in the C-terminus (average 0.001 logMAR increase per year).
Pericentral RP was the major phenotype in patients with EYS-associated arRP. There was also a statistically significant relationship between the location of the variants and the severity of the disease.
This study may aid patients with EYS-associated arRP to predict future vision acuity based on their genetic and clinical features.
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