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Leigh disease caused by the mitochondrial DNA G14459A mutation in unrelated families
D M Kirby1, S G Kahler, M L Freckmann
1Murdoch Institute, Royal Children's Hospital, Melbourne, Australia.
Abstract:
Leigh disease can be caused by defects of both nuclear and mitochondrially encoded genes. One mitochondrial DNA mutation, G14459A, has been associated with both respiratory chain complex I deficiency and Leber's hereditary optic neuropathy, with or without dystonia. Here, we report the occurrence of this mutation in 3 complex I-deficient patients from 2 separate pedigrees who presented with Leigh disease, with no evidence or family history of Leber's hereditary optic neuropathy or dystonia.
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