Improved detection of mitochondrial DNA instability in mitochondrial genome maintenance disorders.
Journal
Genetics in medicine : official journal of the American College of Medical Genetics
ISSN: 1530-0366
Titre abrégé: Genet Med
Pays: United States
ID NLM: 9815831
Informations de publication
Date de publication:
09 2021
09 2021
Historique:
received:
27
11
2020
accepted:
28
04
2021
revised:
27
04
2021
pubmed:
28
5
2021
medline:
21
10
2021
entrez:
27
5
2021
Statut:
ppublish
Résumé
Diseases caused by defects in mitochondrial DNA (mtDNA) maintenance machinery, leading to mtDNA deletions, form a specific group of disorders. However, mtDNA deletions also appear during aging, interfering with those resulting from mitochondrial disorders. Here, using next-generation sequencing (NGS) data processed by eKLIPse and data mining, we established criteria distinguishing age-related mtDNA rearrangements from those due to mtDNA maintenance defects. MtDNA deletion profiles from muscle and urine patient samples carrying pathogenic variants in nuclear genes involved in mtDNA maintenance (n = 40) were compared with age-matched controls (n = 90). Seventeen additional patient samples were used to validate the data mining model. Overall, deletion number, heteroplasmy level, deletion locations, and the presence of repeats at deletion breakpoints were significantly different between patients and controls, especially in muscle samples. The deletion number was significantly relevant in adults, while breakpoint repeat lengths surrounding deletions were discriminant in young subjects. Altogether, eKLIPse analysis is a powerful tool for measuring the accumulation of mtDNA deletions between patients of different ages, as well as in prioritizing novel variants in genes involved in mtDNA stability.
Identifiants
pubmed: 34040194
doi: 10.1038/s41436-021-01206-w
pii: S1098-3600(21)05106-6
doi:
Substances chimiques
DNA, Mitochondrial
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1769-1778Informations de copyright
© 2021. The Author(s), under exclusive licence to the American College of Medical Genetics and Genomics.
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