Extending the Spectrum of EYS-Associated Retinal Disease to Macular Dystrophy.

Abstract:

Purpose:To assess the phenotypic variability and natural course of inherited retinal diseases (IRDs) caused by EYS mutations. Methods:Multiethnic cohort study (N = 30) with biallelic EYS variants from a clinical IRD database (retinitis pigmentosa [RP], N = 27; cone-rod dystrophy [CRD], N = 1; and macular dystrophy, N = 2). In vitro minigene splice assay was performed to determine the effect on EYS pre-mRNA splicing of the c.1299+5_1299+8del variant in macular dystrophy patients. Results:We found 27 different EYS variants in RP patients and 7 were novel. The rate of visual field loss of the V4e isopter area was -0.84 ± 0.44 ln(deg2) per year, and the rate of visual acuity loss was 0.75 Early Treatment Diabetic Retinopathy Study letters per year. Ellipsoid zone width was correlated with area of the hyperautofluorescent ring, with rs = 0.78 and P < 0.001. Rate of decline in ellipsoid zone width was -57 ± 17 μm per year (P < 0.01) (n = 14) or -3.69% ± 0.51% from baseline per year (P < 0.001). An isolated CRD patient carried a homozygous EYS variant (c.9405T>A), previously identified in RP patients. Two siblings with macular dystrophy carried compound heterozygous EYS variants: c.1299+5_1299+8del and c.6050G>T. The former was novel and shown to result in skipping of exon 8, and the latter was a known RP variant. Conclusions:We report on EYS-associated macular dystrophy, extending the spectrum of EYS-associated IRDs. We observed heterogeneity between RP patients in age of onset and disease progression. Identical EYS variants were found in cases with RP, CRD, and macular dystrophy. Screening for EYS variants in CRD and macular dystrophy patients might increase the diagnostic yield in previously unsolved cases.

authors

Pierrache LHM,Messchaert M,Thiadens AAHJ,Haer-Wigman L,de Jong-Hesse Y,van Zelst-Stams WAG,Collin RWJ,Klaver CCW,van den Born LI

doi

10.1167/iovs.18-25531

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

2049-2063

issue

6

eissn

0146-0404

issn

1552-5783

pii

2733513

journal_volume

60

pub_type

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