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

Mitochondrion. 2019 Jul;47:309-317. doi: 10.1016/j.mito.2019.02.006. Epub 2019 Mar 1.

Abstract

Mitochondrial 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.

Keywords: Gene panel; Mitochondrial diseases; Next generation sequencing; Nuclear genes; Respiratory chain; mtDNA.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Child
  • Child, Preschool
  • Cohort Studies
  • Female
  • Genome, Mitochondrial*
  • High-Throughput Nucleotide Sequencing*
  • Humans
  • Infant
  • Male
  • Middle Aged
  • Mitochondrial Diseases / genetics*
  • Molecular Diagnostic Techniques*
  • Sequence Analysis, DNA*