Effects of the venom of the green mamba, dendroaspis angusticeps on skeletal muscle and neuromuscular transmission

J. C. BARRETT, A. L. HARVEY

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32 Citations (Scopus)

Abstract

The venom of the green mamba, Dendroaspis angusticeps, was tested for effects on neuromuscular transmission and skeletal muscle contractility in isolated phrenic nerve‐hemidiaphragm preparations of the rat and mouse, chick biventer cervicis muscle preparations and in aneural cultures of embryonic chick skeletal muscle. The venom (10 to 40 μg/ml) augmented the responses to indirect but not direct stimulation. As the venom did not have anticholinesterase activity and did not increase receptor sensitivity, it is likely that the venom enhanced release of acetylcholine. Higher concentrations of venom (40 to 80 μg/ml) inhibited acetylcholine receptor sensitivity. Prolonged exposure to the higher concentrations of venom produced a failure of muscle contractility. Signs of muscle degeneration were seen in skeletal muscle cultures.

Original languageEnglish
Pages (from-to)199-205
Number of pages7
JournalBritish Journal of Pharmacology
Volume67
Issue number2
DOIs
Publication statusPublished - 1 Jan 1979

Keywords

  • acetylcholine
  • acetylthiocholine
  • carbachol
  • cytarabine
  • snake venom
  • tubocurarine chloride
  • animal experiment
  • dose response
  • drug response
  • in vitro study
  • mouse
  • muscle contractility
  • musculoskeletal system
  • neuromuscular synapse
  • neuromuscular transmission
  • receptor sensitivity
  • tissue culture

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