Transforming growth factor beta-induced p.(L558P) variant is associated with autosomal dominant lattice corneal dystrophy type IV in a large cohort of Spanish patients
Por:
Campos-Mollo E, Varela-Conde Y, Arriola-Villalobos P, Cabrera-Beyrouti R, Benítez-Del-Castillo JM, Maldonado MJ and Escribano J
Publicada:
1 sep 2019
Resumen:
Importance Rare transforming growth factor beta-induced (TGFBI) gene variants are involved in autosomal dominant corneal dystrophies (CDs) with heterogeneous clinical features. Background The purpose of this study was to analyse TGFBI gene variants and genotype-phenotype correlations in a cohort affected by atypical stromal CD. Design Retrospective cohort study (from May 2014 to September 2017). Participants Thirty-five individuals from 10 unrelated South European families presenting atypical lattice CD (LCD) were included. Methods Corneal phenotypes were assessed by slit-lamp examination and optical coherence tomography (OCT). Contrast sensitivity was measured under mesopic conditions. Genomic DNA was obtained from blood samples, and all 17 TGFBI exons were screened for variants by Sanger sequencing. Main Outcome Measures p.(L558P) variant of TGFBI gene. Results The p.(L558P) variant was identified in 22 members of the 10 families diagnosed with atypical LCD, characterized by late-onset and absence of recurrent erosion syndrome. OCT revealed punctiform deposits in the deep-mid stroma and normal anterior stroma. This variant was demonstrated to be transmitted with the disease according to autosomal dominant inheritance in most families. Conclusions and Relevance To the best of our knowledge, we describe a detailed clinical characterization of the largest CD cohort carrying the TGFBI p.(L558P) variant. We propose that the atypical phenotype of this recently reported alteration can be classified as a form of LCD type IV. The results show that OCT and anterior-posterior analysis of the stromal location of the opacities, along with a genetic analysis of TGFBI, are required to ensure accurate diagnosis and management of CDs.
Filiaciones:
:
Ophthalmology Department, Hospital Virgen de los Lirios, Alcoy, Spain
Cooperative Research Network on Age-Related Ocular Pathology, Visual and Life Quality, Institute of Health Carlos III, Madrid, Spain
Varela-Conde Y:
Ophthalmology Department, Hospital Universitario Río Hortega, Valladolid, Spain
Arriola-Villalobos P:
Cooperative Research Network on Age-Related Ocular Pathology, Visual and Life Quality, Institute of Health Carlos III, Madrid, Spain
Ophthalmology Department, Hospital Clínico San Carlos, Madrid, Spain
Institute of Health Research, Hospital Clínico San Carlos, Madrid, Spain
:
Ophthalmology Department, Hospital de Lluís Alcanyís, Alicante, Spain
Benítez-Del-Castillo JM:
Cooperative Research Network on Age-Related Ocular Pathology, Visual and Life Quality, Institute of Health Carlos III, Madrid, Spain
Ophthalmology Department, Hospital Clínico San Carlos, Madrid, Spain
Institute of Health Research, Hospital Clínico San Carlos, Madrid, Spain
Immunology, Ophthalmology and Otorhinolaryngology Department, Complutense University, Madrid, Spain
Rementería Clinic, Madrid, Spain
Maldonado MJ:
Cooperative Research Network on Age-Related Ocular Pathology, Visual and Life Quality, Institute of Health Carlos III, Madrid, Spain
Institute of Applied Ophthalmobiology (IOBA-Eye Institute), University of Valladolid, Valladolid, Spain
Escribano J:
Cooperative Research Network on Age-Related Ocular Pathology, Visual and Life Quality, Institute of Health Carlos III, Madrid, Spain
Genetics Area, Faculty of Medicine/IDINE, University of Castilla-La Mancha, Albacete, Spain
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