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Updated: Jan 28, 2026

Targeted DNA Methylation Analysis by Next-generation Sequencing
Published on: February 24, 2015
Targeted next generation sequencing identifies novel pathogenic variants and provides molecular diagnoses in a cohort
Célia Nogueira1, Lisbeth Silva2, Cristina Pereira3
1Research & Development Unit, Human Genetics Department, National Institute of Health Doutor Ricardo Jorge, Porto, Portugal; Newborn Screening, Metabolism & Genetics Unit, Human Genetics Department, National Institute of Health Doutor Ricardo Jorge, Porto, Portugal.
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.
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