
handle: 11441/139732 , 10261/265509 , 10668/17807
[PT] Mutações no gene ABCA4 são causa comum da doença de Stargardt, mas outros fenótipos da retina também foram associados a mutações nesse gene. Apresentamos um relato de caso observacional de um fenótipo clínico incomum da doença de Stargardt. O exame oftalmológico incluiu a acuidade visual com melhor correção, fotografia em cores e com autofluorescência, angiofluoresceinografia, tomografia de coerência óptica e testes de eletrofisiologia. Na paciente em questão, realizou-se o sequenciamento de próxima geração de 99 genes associados a distrofias retinais hereditárias. Tratava-se de uma mulher de 48 anos com melhor acuidade visual corrigida de 20/25 e 20/20. A fundoscopia revelou lesões puntiformes amarelas perifoveais. Os resultados da angiofluoresceinografia e da autofluorescência do fundo de olho foram consistentes com distrofia em padrão. A eletrorretinografia por padrões mostrou diminuição bilateral dos valores de p50. Os testes genéticos revelaram duas mutações missense heterozigóticas, c.428C>T, p. (Pro143Leu) e c.3113C>T, p. (Ala.1038Val), no gene ABCA4. Nossos resultados nos fazem pensar que essas mutações específicas em ABCA4 talvez possam estar associadas a um fenótipo específico da doença, caracterizado por uma aparência fundoscópica semelhante à da distrofia em padrão. Uma caracterização detalhada do fenótipo da retina em pacientes portadores de mutações específicas em ABCA4 é crucial para compreender a expressão da doença e para garantir o tratamento clínico ideal para pacientes com distrofias retinais hereditárias.
[EN] Mutations in the ABCA4 gene are a common cause of Stargardt disease; however, other retinal phenotypes have also been associated with mutations in this gene. We describe an observational case report of an unusual clinical phenotype of Stargardt disease. The ophthalmological examination included best corrected visual acuity, color and autofluorescence photography, fluorescein angiography, optical coherence tomography, and electrophysiology tests. Targeted next-generation sequencing of 99 genes associated with inherited retinal dystrophies was performed in the index patient. A 48-year-old woman presented with a best corrected visual acuity of 20/25 and 20/20. Fundoscopy revealed perifoveal yellow flecked-like lesions. Fluorescein angiography and fundus autofluorescence findings were consistent with pattern dystrophy. Pattern electroretinogram demonstrated bilateral decrease of p50 values. Genetic testing identified two heterozygous missense mutations, c.428C>T, p.(Pro143Leu) and c.3113C>T, p.(Ala.1038Val), in the ABCA4 gene. Based on our results, we believe that these particular mutations in the ABCA4 gene could be associated with a specific disease phenotype characterized by funduscopic appearance similar to pattern dystrophy. A detailed characterization of the retinal phenotype in patients carrying specific mutations in ABCA4 is crucial to understand disease expression and ensure optimal clinical care for patients with inherited retinal dystrophies.
This work was supported by Instituto de Salud Carlos III (ISCIII), Spanish Ministry of Economy and Competitiveness and co-funded by European Union (ERDF, “A way to make Europe”) [PI15-01648] and [PI1800612]; regional Ministry of Economy, Innovation, Science and Employment [CTS-1664] and regional Ministry of Health and Families [PEER-0501-2019] of the Autonomous Government of Andalusia; Foundation Isabel Gemio/Foundation Cajasol [FGEMIO-2019-01].
Fluorescein angiography, Membro 4 da Subfamília A de transportadores de cassetes de ligação de ATP, Stargardt disease/diagnosis, Member 4, Tomography, optical coherence, Angiofluoresceinografia, Pattern dystrophy‑like phenotype, Multimodal imaging, ATP-binding cassette transporter, Electroretinography, Humans, Stargardt Disease, ATP- -binding cassette transporter, Letters, Fluorescein Angiography, Tomography, Doença de Stargardt/diagnóstico, ABCA4 mutations, Enfermedad de Stargardt, Inherited retinal dystrophies, Optical coherence, ATP-binding cassette transporters, Distrofia macular tipo patrón, Electrophysiology tests, Middle Aged, Retinal dystrophies, Imagen multimodal, Eletrorretinografia, Stargardt disease, Electrofisiología ocular, Phenotype, Subfamily A, Distrofias retinianas, Tomografia de coerência óptica, Mutaciones en ABCA4, Mutation, Distrofias hereditarias de la retina, ATP-Binding Cassette Transporters, Female, ATP-binding cassette transporter, subfamily A, member 4, Tomography, Optical Coherence
Fluorescein angiography, Membro 4 da Subfamília A de transportadores de cassetes de ligação de ATP, Stargardt disease/diagnosis, Member 4, Tomography, optical coherence, Angiofluoresceinografia, Pattern dystrophy‑like phenotype, Multimodal imaging, ATP-binding cassette transporter, Electroretinography, Humans, Stargardt Disease, ATP- -binding cassette transporter, Letters, Fluorescein Angiography, Tomography, Doença de Stargardt/diagnóstico, ABCA4 mutations, Enfermedad de Stargardt, Inherited retinal dystrophies, Optical coherence, ATP-binding cassette transporters, Distrofia macular tipo patrón, Electrophysiology tests, Middle Aged, Retinal dystrophies, Imagen multimodal, Eletrorretinografia, Stargardt disease, Electrofisiología ocular, Phenotype, Subfamily A, Distrofias retinianas, Tomografia de coerência óptica, Mutaciones en ABCA4, Mutation, Distrofias hereditarias de la retina, ATP-Binding Cassette Transporters, Female, ATP-binding cassette transporter, subfamily A, member 4, Tomography, Optical Coherence
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