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Related Experiment Videos

Clindamycin and lincomycin alter miniature endplate current decay.

J F Fiekers, I G Marshall, R L Parsons

    Nature
    |October 25, 1979
    PubMed
    Summary

    Antibiotics like clindamycin and lincomycin can cause muscle paralysis through distinct mechanisms. Clindamycin directly depresses muscle contractility, while lincomycin affects neuromuscular transmission, altering endplate channel behavior differently.

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    Area of Science:

    • Pharmacology
    • Neuroscience
    • Molecular Biology

    Background:

    • Antibiotic-induced muscle paralysis is a known side effect of certain drug classes.
    • Aminoglycosides, polymyxins, and tetracyclines are established causes of neuromuscular blockade.
    • Lincomycin and clindamycin, though structurally related, exhibit unique paralysis characteristics.

    Purpose of the Study:

    • To investigate the distinct mechanisms by which lincomycin and clindamycin induce muscle paralysis.
    • To elucidate the effects of these antibiotics on endplate channel behavior.

    Main Methods:

    • Electrophysiological recordings of miniature endplate currents (m.e.p.c.s) in a relevant model.
    • Analysis of m.e.p.c. decay kinetics and voltage sensitivity.
    • Comparison of the effects of clindamycin and lincomycin on neuromuscular function.

    Main Results:

    • Clindamycin increased m.e.p.c. decay rate and reduced voltage sensitivity without changing decay nature.
    • Lincomycin altered m.e.p.c. decay, causing an initial rapid phase followed by a prolonged phase.
    • Both antibiotics demonstrated significant, yet differential, impacts on endplate channel behavior.

    Conclusions:

    • Clindamycin appears to directly depress muscle contractility.
    • Lincomycin's primary action seems to be the depression of neuromuscular transmission.
    • These findings clarify the distinct neuromuscular effects of clindamycin and lincomycin, contributing to understanding antibiotic-induced paralysis.

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