HOMEPRODUCTSSERVICESCOMPANYCONTACTFAQResearchDictionaryPharmaMobileSign Up FREE or Login

Cytochrome c oxidase deficiency in zidovudine myopathy affects perifascicular muscle fibres and arterial smooth muscle cells.

Abstract
In order to assess the pathogenesis of myopathological alterations induced by zidovudine, we studied muscle samples from 21 patients infected by human immunodeficiency virus with zidovudine myopathy. Cytochrome c oxidase histoenzymatic reaction was evaluated in skeletal muscle fibres and arterial smooth muscle cells. Other investigations included immunocytochemistry for membrane attack complex and endomysial capillary counts. All patients had partial cytochrome c oxidase deficiency. A perifascicular distribution of cytochrome c oxidase-deficient fibres was found in 14 of 21 patients. Cytochrome c oxidase-deficient fibres were significantly more frequent in perifascicular areas than in the complete muscle sections (28% vs 12%, P < 0.001). Cytochrome c oxidase-deficient arteries were found in 11 patients, of whom 10 also had a perifascicular deficiency. Mononuclear microvascular inflammation was observed in four patients and membrane attack complex deposition in capillary walls in two patients. The capillary counts were not significantly different in the patients and in the controls. These results suggest that, in addition to a direct action of zidovudine on mitochondrial DNA, chronic muscle ischaemia related to zidovudine-induced vascular dysfunction might be implicated at the inception of muscle damage in zidovudine myopathy.
AuthorsP Chariot, F Le Maguet, F J Authier, D Labes, F Poron, R Gherardi
JournalNeuropathology and applied neurobiology (Neuropathol Appl Neurobiol) Vol. 21 Issue 6 Pg. 540-7 (Dec 1995) ISSN: 0305-1846 [Print] ENGLAND
PMID8745244 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Antiviral Agents
  • Biomarkers
  • Zidovudine
  • Succinate Dehydrogenase
  • Electron Transport Complex IV
Topics
  • Adult
  • Aged
  • Antiviral Agents (adverse effects)
  • Atrophy
  • Biomarkers
  • Capillaries (pathology)
  • Cytochrome-c Oxidase Deficiency
  • Electron Transport Complex IV (analysis)
  • Female
  • HIV Infections (drug therapy, enzymology, pathology)
  • Humans
  • Male
  • Middle Aged
  • Mitochondrial Myopathies (chemically induced, enzymology, pathology)
  • Muscle Fibers, Skeletal (enzymology, pathology)
  • Muscle, Skeletal (enzymology, pathology)
  • Muscle, Smooth, Vascular (enzymology, pathology)
  • Succinate Dehydrogenase (analysis)
  • Zidovudine (adverse effects)

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research network!


Choose Username:
Email:
Password:
Verify Password: