4.5 Article Proceedings Paper

Molecular basis for treatment of mitochondrial myopathies

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NEUROLOGICAL SCIENCES
卷 21, 期 5, 页码 S909-S912

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SPRINGER-VERLAG ITALIA SRL
DOI: 10.1007/s100720070002

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mitochondrial myopathies; therapy

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Mitochondrial DNA (mtDNA) is the only autonomously replicating source of DNA outside the nucleus. The mitochondrial genome encodes thirteen essential polypeptides of the mitochondrial respiratory chain. Defects of the mitochondrial genome can cause severe neurological and multi-systemic disorders. In many patients there is a mixture of mutated and wild-type mtDNA in the same cell (a situation termed heteroplasmy). In these patients the ratio of mutated to wild-type mtDNA is crucial and a biochemical defect only occurs with relatively high levels of mutated mtDNA within an individual cell. This threshold also seems to be critical in the development of mtDNA disease. Since the genetic defect causes a dysfunction in the terminal stage of oxidative metabolism, there is little potential for pharmacological intervention. Molecular techniques must be developed to reverse the ratio of mutated and wild-type mtDNA. In this paper we summarise our approach using both antigenomic peptide nucleic acids and cell necrosis.

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