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- Title
Depletion of muscle mitochondrial DNA in AIDS patients with zidovudine-induced myopathy.
- Authors
Arnaudo, E; Dalakas, M; Shanske, S; Moraes, C T; DiMauro, S; Schon, E A
- Abstract
Long-term zidovudine therapy in patients with human immunodeficiency virus (HIV) infection can cause a destructive mitochondrial myopathy with histological features of ragged-red fibres (RRF) and proliferation of abnormal mitochondria. In 9 zidovudine-treated patients with this myopathy we found severely reduced amounts (up to 78% reduction vs normal adult controls) of mitochondrial DNA (mtDNA) in muscle biopsy specimens by means of Southern blotting. In 2 HIV-positive patients who had not received zidovudine, muscle mtDNA content did not differ from that in the 4 controls. Depletion of mtDNA seems to be reversible, since 1 patient showed a substantial reduction in RRF and a concomitant pronounced increase in muscle mtDNA content after zidovudine therapy was discontinued. Depletion of muscle mtDNA is probably due to zidovudine-induced inhibition of mtDNA replication by DNA polymerase gamma and is not a secondary effect of HIV infection.
- Publication
Lancet (London, England), 1991, Vol 337, Issue 8740, p508
- ISSN
0140-6736
- Publication type
Journal Article
- DOI
10.1016/0140-6736(91)91294-5