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Aviakosm Ekolog Med · Jan 2014
[Investigation into the vestibular protective properties of melatoninergic agents].
- V V Iasnetsov, V G Motin, S K Karsanova, Vic V Iasnetsov, Iu V Ivanov, and N A Chel'naia.
- Aviakosm Ekolog Med. 2014 Jan 1;48(2):31-4.
AbstractExperiments with rats showed that melatonin (2.5 mg/kg) produces a distinct vestibular protective effect excelling promethazine (50 mg/kg) as a reference agent, and also antidepressant agomelatine (5 mg/kg) as another melatoninergic agent. Lusindol, a blocker of MT1/MT2-receptors (2.5 mg/kg), and bicuculline (1.5 mg/kg), a specific GABA-receptors antagonist, weakened the melatonin effect significantly. The results testify mediation of the melatonin action by these receptors. Whole-cell patch clamp in an experiment with convoluted oblongata sections from white nonlinear infant male rats (14-d old) disclosed that melatonin (2 mM) inhibited drastically (29 +/- 3%) the excitatory postsynaptic current caused by depolarization step in neurons of the medial vestibular nucleus. Lusindol (0.1 mM) inhibited the effect of melatonin (2 mM) significantly (71 +/- 6%) which suggests involvement of melatonin MT1/MT2-receptors.
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