Targeted next generation sequencing identifies novel pathogenic variants and provides molecular diagnoses in a cohort of pediatric and adult patients with unexplained mitochondrial dysfunction

Nogueira, CéliaSilva, LisbethPereira, CristinaVieira, LuísLeão Teles, ElisaRodrigues, EsmeraldaCampos, TeresaJaneiro, PatríciaGaspar, AnaDupont, JulietteBandeira, AnabelaMartins, EsmeraldaMagalhães, MarinaSequeira, SílviaVieira, José PedroSantos, HelenaVilarinho, SílviaVilarinho, Laura2020-04-302020-04-302019-03-01Mitochondrion. 2019 Jul;47:309-317. doi: 10.1016/j.mito.2019.02.006. Epub 2019 Mar 11567-7249http://hdl.handle.net/10400.18/6560Mitochondrial diseases (MD) are a group of rare inherited disorders, characterized by phenotypic heterogeneity, with hitherto no effective therapeutic options. The aim of this study was to develop a next generation sequencing (NGS) strategy, by using a custom gene panel and whole mitochondrial genome, to identify the disease causing pathogenic variants in 146 patients suspicious of MD. The molecular analysis of this cohort revealed six novel and 15 described pathogenic variants, as well as 26 variants of unknown significance. Our findings are expanding the mutational landscape of these disorders and support the use of a NGS strategy for a higher diagnostic yield.engMitochondrial DiseasesGene PanelmtDNANuclear GenesNext Generation SequencingRespiratory ChainDoenças GenéticasTargeted next generation sequencing identifies novel pathogenic variants and provides molecular diagnoses in a cohort of pediatric and adult patients with unexplained mitochondrial dysfunctionjournal article10.1016/j.mito.2019.02.006