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Effect of glucocorticoids on contractile apparatus of rat skeletal muscle.

Abstract
Skeletal muscles which have a high oxidative potential are less sensitive to the catabolic action of dexamethasone. In fast-twitch white muscles, where the oxidative capacity is low, the alkaline proteinase activity as well as the rise in the number of lysosomes was more pronounced. It seems that the glucocorticoid-caused myopathy is a result of elevated degradation of contractile proteins. This process of degradation of contractile proteins begins in the myosine filaments and then spreads to the thin filaments and the z-line.
AuthorsT Seene, M Umnova, K Alev, A Pehme
JournalJournal of steroid biochemistry (J Steroid Biochem) Vol. 29 Issue 3 Pg. 313-7 (Mar 1988) ISSN: 0022-4731 [Print] England
PMID3282126 (Publication Type: Comparative Study, Journal Article)
Chemical References
  • Contractile Proteins
  • Dexamethasone
  • Endopeptidases
Topics
  • Actin Cytoskeleton (ultrastructure)
  • Animals
  • Contractile Proteins (metabolism)
  • Dexamethasone (pharmacology)
  • Endopeptidases (metabolism)
  • Hydrogen-Ion Concentration
  • Lysosomes (metabolism, ultrastructure)
  • Male
  • Microscopy, Electron
  • Muscles (drug effects, metabolism, ultrastructure)
  • Oxidation-Reduction
  • Rats
  • Rats, Inbred Strains

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