Summary
In order to test the hypothesis that mitochondrial myopathy may be caused by mutation of the mitochondrial (mt) genome, restriction fragment length polymorphism in leucocyte mt DNA has been studied in 38 patients with mitochondrial myopathy, 44 of their unaffected matrilineal relatives, and 35 normal control subjects. Previously unreported mt DNA polymorphisms were identified in both patients and controls. No differences in restriction fragment patterns were observed between affected and unaffected individuals in the same maternal line, and there was no evidence of major deletion of mt DNA in patients. This study provides no positive evidence of mitochondrial inheritance in mitochondrial myopathy, but this has not been excluded.
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Holt, I.J., Harding, A.E. & Morgan-Hughes, J.A. Mitochondrial DNA polymorphism in mitochondrial myopathy. Hum Genet 79, 53–57 (1988). https://doi.org/10.1007/BF00291710
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DOI: https://doi.org/10.1007/BF00291710