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[On the mechanism of antimotion sickness effects of mexidol]

V G Motin, V V Iasnetsov

    Aviakosmicheskaia I Ekologicheskaia Meditsina = Aerospace and Environmental Medicine
    |September 1, 2010
    PubMed

    Insights

    Mexidol significantly inhibits excitatory postsynaptic currents in rat neurons, suggesting its anti-motion sickness effects stem from blocking ion channels, particularly NMDA-receptors.

    Area of Science:

    • Neuroscience
    • Pharmacology
    • Ion Channel Physiology

    Background:

    • Motion sickness is a debilitating condition.
    • Mexidol is a potential therapeutic agent.
    • Understanding its mechanism of action is crucial.

    Purpose of the Study:

    • To investigate the ion mechanisms underlying the anti-motion sickness effects of Mexidol.
    • To determine the specific ion channels modulated by Mexidol in the medial vestibular nucleus.

    Main Methods:

    • Whole-cell patch-clamp recordings were performed on rat medullar oblongata slices.
    • Experiments utilized convoluted medullar oblongata sections from young male rats.
    • Excitation postsynaptic currents were measured under specific voltage-clamp conditions.

    Main Results:

    • 5 mV of Mexidol induced a 96 +/- 2% inhibition of excitatory postsynaptic currents.
    • This inhibition was observed in neurons of the medial vestibular nucleus.
    • The effect was linked to a 10 mV depolarization step and a holding potential of -70 mV.

    Conclusions:

    • Mexidol's anti-motion sickness properties are mediated by ion mechanisms.
    • It involves modulation of glutamate and GABAergic components.
    • Primarily, Mexidol inhibits ion currents through NMDA-receptor channels.

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