Neuromuscular transmission in the mdx mouse

Alexandre Nagel, Frank Lehmann‐Horn, Andrew G. Engel

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

The mdx mouse is an animal model for human Duchenne dystrophy. In both disorders, the muscle fiber plasma membrane is rendered selectively vulnerable by dystrophin deficiency. In both disorders there are also ultrastructural abnormalities involving the postsynaptic membrane of the neuromuscular junction. The object of this electrophysiologic study was to determine whether the observed ultrastructural abnormalities at the mdx neuromuscular junction are associated with an abnormality of neuromuscular transmission. In comparison with age‐matched control mice, the mdx mice show an abnormal, age‐dependent decrease of the amplitude of the miniature end‐plate potential and aconcomitant increase in the quantal content of the end‐plate potential. Consequently, the safety margin of neuromuscular transmission is not impaired.

Original languageEnglish (US)
Pages (from-to)742-749
Number of pages8
JournalMuscle & Nerve
Volume13
Issue number8
DOIs
StatePublished - Aug 1990

Keywords

  • acetylcholine receptor
  • mdx mouse
  • muscular dystrophy
  • neuromuscular junction
  • neuromuscular transmission

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)

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