title: Mitochondrial oxidative phosphorylation in autosomal dominant optic atrophy.
abstract: BACKGROUND
  Autosomal dominant optic atrophy (ADOA), a form of progressive bilateral blindness due to loss of retinal ganglion cells and optic nerve deterioration, arises predominantly from mutations in the nuclear gene for the mitochondrial GTPase, OPA1. OPA1 localizes to mitochondrial cristae in the inner membrane where electron transport chain complexes are enriched. While OPA1 has been characterized for its role in mitochondrial cristae structure and organelle fusion, possible effects of OPA1 on mitochondrial function have not been determined.
  
  
  RESULTS
  Mitochondria from six ADOA patients bearing OPA1 mutations and ten ADOA patients with unidentified gene mutations were studied for respiratory capacity and electron transport complex function. Results suggest that the nuclear DNA mutations that give rise to ADOA in our patient population do not alter mitochondrial electron transport.
  
  
  CONCLUSIONS
  We conclude that the pathophysiology of ADOA likely stems from the role of OPA1 in mitochondrial structure or fusion and not from OPA1 support of oxidative phosphorylation.
authors.affiliation: Division of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA. mayorov_vi@mercer.edu
authors.forename: Vladimir I
authors.initials: VI
authors.lastname: Mayorov
authors.forename: Angela J
authors.initials: AJ
authors.lastname: Lowrey
authors.forename: Valerie
authors.initials: V
authors.lastname: Biousse
authors.forename: Nancy J
authors.initials: NJ
authors.lastname: Newman
authors.forename: Susan D
authors.initials: SD
authors.lastname: Cline
authors.forename: Michael D
authors.initials: MD
authors.lastname: Brown
mesh_terms: D004579:Electron Transport / Q000235:genetics; D020558:GTP Phosphohydrolases / Q000235:genetics / Q000378:metabolism; D006801:Humans; D008928:Mitochondria / Q000378:metabolism*; D009154:Mutation; D029241:Optic Atrophy, Autosomal Dominant / Q000235:genetics / Q000378:metabolism*; D010085:Oxidative Phosphorylation
chemical_list: D020558:GTP Phosphohydrolases; C415198:OPA1 protein, human
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