López-Rodríguez VR, Arce-González R, Martínez-Aguilar A, Rodríguez-López CE, Groman-Lupa S, Neria-González MI, Rodríguez-Uribe G, Zenteno JC. Mutational Profile and Retinal Phenotypes of
PCARE-Related Cone-Rod Dystrophies in a Mexican Cohort.
J Ophthalmol 2024;
2024:4003914. [PMID:
38468717 PMCID:
PMC10927338 DOI:
10.1155/2024/4003914]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/31/2024] [Accepted: 02/24/2024] [Indexed: 03/13/2024] Open
Abstract
Purpose
The aim of the study is to describe the genotype and phenotype of a Mexican cohort with PCARE-related retinal disease.
Methods
The study included 14 patients from 11 unrelated pedigrees with retinal dystrophies who were demonstrated to carry biallelic pathogenic variants in PCARE. Visual assessment methods included best corrected visual acuity, color fundus photography, Goldmann visual field test, kinetic perimetry, dark/light adapted chromatic perimetry, full-field electroretinography, autofluorescence imaging, and spectral domain-optical coherence tomography imaging. Genetic screening was performed either by gene panel sequencing or by exome sequencing.
Results
According to the results of multimodal imaging and functional tests, all 14 patients were diagnosed with cone-rod dystrophy. Six different PCARE pathogenic alleles were identified in our cohort, including three novel mutations: c.3048_3049del (p.Tyr1016∗), c.3314_3315del (p.Ser1105∗), and c.551A > G (p.His184Arg). Notably, alleles p.His184Arg, p.Arg613∗, and p.Arg984∗ were present in 18 of the 22 (82%) PCARE alleles from probands in our cohort.
Conclusion
Our work expands the PCARE mutational profile by identifying three novel pathogenic variants causing retinal dystrophy. While phenotypic variations occurred among patients, a cone-rod dystrophy pattern was observed in all affected individuals.
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