Infantile onset encephalomyopathy, retinopathy, optic atrophy, and mitochondrial DNA depletion associated with a novel pathogenic DHX16 variant.
Clin Genet
; 104(6): 686-693, 2023 12.
Article
em En
| MEDLINE
| ID: mdl-37574199
ABSTRACT
We studied a patient with mitochondrial DNA depletion in skeletal muscle and a multiorgan phenotype, including fatal encephalomyopathy, retinopathy, optic atrophy, and sensorineural hearing loss. Instead of pathogenic variants in the mitochondrial maintenance genes, we identified previously unpublished variant in DHX16 gene, a de novo heterozygous c.1360C>T (p. Arg454Trp). Variants in DHX16 encoding for DEAH-box RNA helicase have previously been reported only in five patients with a phenotype called as neuromuscular oculoauditory syndrome including developmental delay, neuromuscular symptoms, and ocular or auditory defects with or without seizures. We performed functional studies on patient-derived fibroblasts and skeletal muscle revealing, that the DHX16 expression was decreased. Clinical features together with functional data suggest, that our patient's disease is associated with a novel pathogenic DHX16 variant, and mtDNA depletion could be a secondary manifestation of the disease.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Doenças Retinianas
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Atrofia Óptica
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Erros Inatos do Metabolismo
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
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Infant
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article