A Multisystem Mitochondrial Disease Caused by a Novel MT-TL1 mtDNA Variant: A Case Report

Autor: Domenico Giannese, Vincenzo Montano, Piervito Lopriore, Claudia Nesti, Annalisa LoGerfo, Maria Adelaide Caligo, Flavio Dal Canto, Gianandrea Pasquinelli, Angelo Giovanni Bonadio, Diego Moriconi, Gabriele Siciliano, Michelangelo Mancuso
Rok vydání: 2022
Předmět:
Zdroj: Journal of neuromuscular diseases. 10(1)
ISSN: 2214-3602
Popis: Background: Mitochondrial tRNA (MTT) genes are hotspot for mitochondrial DNA mutation and are responsible of half mitochondrial disease. MTT mutations are associated with a broad spectrum of phenotype often with complex multisystem involvement and complex genotype-phenotype correlations. MT-TL1 mutations, among which the m.3243A>G mutation is the most frequent, are associated with myopathy, maternal inherited diabetes and deafness, MELAS, cardiomyopathy, and focal segmental glomerulosclerosis. Case study: Here we report the case of an Italian 49-years old female presenting with encephalomyopathy, chronic proteinuric kidney disease and a new heteroplasmic m.3274_3275delAC MT-TL1 gene mutation. Conclusions: Our case demonstrates a systemic mitochondrial disease caused by the heteroplasmic m.3274_3275delAC MT-TL1 gene mutation, not yet described in the literature. A mitochondrial disease should be suspected in case of complex multisystem phenotypes, including steroid-resistant nephrotic syndrome with multisystemic involvement.
Databáze: OpenAIRE