Evidence map›Paper›PMID 39644342›Full record

ArticleInternational ophthalmology2024

Multimodal imaging and genetic screening in Mexican patients with Gyrate atrophy: identification of novel OAT pathogenic variants.

Ana Lía Díazceballos-García, Rodrigo Matsui, María Graciela Chairez Miranda, Jaime Francisco Rosales Padrón, Federico Graue-Wiechers, Juan Carlos Zenteno

Abstract read
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Article in International ophthalmology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Ana Lía Díazceballos-GarcíaRetina and Vitreous Department, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca 14 Colonia Obrera, C.P. 06800, Mexico City, Mexico. analiadiazceballos@gmail.com.ORCID https://orcid.org/0000-0003-1972-6429
Rodrigo MatsuiRetina and Vitreous Department, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca 14 Colonia Obrera, C.P. 06800, Mexico City, Mexico. romatsui@institutodeoftalmologia.org.ORCID https://orcid.org/0000-0002-4492-7006
María Graciela Chairez MirandaGenetics Department, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico.
Jaime Francisco Rosales PadrónRetina and Vitreous Department, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca 14 Colonia Obrera, C.P. 06800, Mexico City, Mexico.
Federico Graue-WiechersRetina and Vitreous Department, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca 14 Colonia Obrera, C.P. 06800, Mexico City, Mexico.
Juan Carlos ZentenoGenetics Department, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico.ORCID https://orcid.org/0000-0002-9716-8146

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeDescription of retinal phenotype by structural and functional testing, ornithine plasma levels and mutational data of OAT gene in patients with Gyrate Atrophy (GA).

methodsOphthalmologic examination, fundus photography (CFP), autofluorescence (FAF), spectral-domain optical coherence tomography (SD-OCT), Goldmann perimetry (GP), full-field electroretinogram (ffERG) and chromatic perimetry (CP) testing were performed. Ornithine plasma levels were measured. Sanger sequencing mutational analysis of the coding exons and exon-intron junctions of the OAT gene were analyzed.

resultsTwelve eyes of seven Mexican patients with GA were included. CFF showed peripheric patches of chorioretinal atrophy; FAF revealed peripheric oval areas of hypoautofluorescence; SD-OCT exhibited outer retinal tubulations in 58%, cystoid macular edema in 50%, epiretinal membrane in 42%, foveoschisis and staphyloma in 17%, and hyperreflective deposits in 100% of the eyes; GP showed constricted visual fields in 100% of the eyes; ffERG revealed preserved photopic response in 17% and preserved scotopic response in 17% of the eyes; CP exposed a deficit in generalized response of rods and cones in 100% of the eyes. Mean ornithine plasma levels were 509.5 µmol/L. One patient with genetic confirmation of GA had normal ornithine plasma levels (48 µmol/L). Molecular findings in OAT gene detected two novel pathogenic variants: c.796 C > T (p.Gln266*) and c.721_722dupCC (p.Asp242ArgfsTer6).

conclusionThis study provides new information regarding functional and structural diagnosis in patients with GA, expands the understanding of retinal phenotype in patients with GA, reports two novel mutations and presents the first case of GA confirmed by genetic testing with normal ornithine levels.

Indexed as

ElectroretinographyGyrate AtrophyMultimodal ImagingOrnithine-Oxo-Acid TransaminaseTomography, Optical CoherenceAdolescentAdultChildDNA Mutational AnalysisFemaleFluorescein AngiographyGenetic TestingHumansMaleMexicoMiddle AgedOAT protein, humanOrnithineOrnithine-Oxo-Acid TransaminaseDystrophyGyrate atrophyHereditary eye diseasesMolecular analysisOAT geneOrnithine

Identifiers

PMID39644342
PMCPMC11625059

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.