De novo CTBP1 variant is associated with decreased mitochondrial respiratory chain activities

  1. Lookup NU author(s)
  2. Ewen Sommerville
  3. Dr Charlotte Alston
  4. Dr Angela Pyle
  5. Dr Langping He
  6. Gavin Falkous
  7. Professor Patrick Chinnery
  8. Professor Bobby McFarland
  9. Professor Robert Taylor
Author(s)Sommerville EW, Alston CL, Pyle A, He L, Falkous G, Naismith K, Chinnery PF, McFarland R, Taylor RW
Publication type Article
JournalNeurology Genetics
Year2017
Volume3
Issue5
Pages
ISSN (electronic)2376-7839
Full text is available for this publication:
Objective: To determine the genetic etiology of a young woman presenting an early-onset, progressive neurodegenerative disorder with evidence of decreased mitochondrial complex I and IV activities in skeletal muscle suggestive of a mitochondrial disorder.Methods: A case report including diagnostic workup, whole-exome sequencing of the affected patient, filtering, and prioritization of candidate variants assuming a suspected autosomal recessive mitochondrial disorder and segregation studies.Results: After excluding candidate variants for an autosomal recessive mitochondrial disorder, re-evaluation of rare and novel heterozygous variants identified a recently reported, recurrent pathogenic heterozygous CTBP1 missense change (c.991C>T, p.Arg331Trp), which was confirmed to have arisen de novo.Conclusions: We report the fifth known patient harboring a recurrent pathogenic de novo c.991C>T p.(Arg331Trp) CTBP1 variant, who was initially suspected to have an autosomal recessive mitochondrial disorder. Inheritance of suspected early-onset mitochondrial disease could wrongly be assumed to be autosomal recessive. Hence, this warrants continued re-evaluation of rare and novel heterozygous variants in patients with apparently unsolved suspected mitochondrial disease investigated using next-generation sequencing.
PublisherWolters Kluwer Health
URLhttps://doi.org/10.1212/NXG.0000000000000187
DOI10.1212/NXG.0000000000000187
PubMed idPMC5610040
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