Literature DB >> 8287912

The effects of selective activation of the 5-HT3 receptor with m-chlorophenylbiguanide on sleep and wakefulness in the rat.

A Ponzoni1, J M Monti, H Jantos.   

Abstract

The effects of the 5-HT3 receptor agonist, m-chlorophenylbiguanide, were compared with those of the 5-HT3 receptor antagonist, MDL 72222, in rats implanted with electrodes for chronic sleep recordings. m-Chlorophenylbiguanide (12.5-50.0 micrograms) injected into the left lateral ventricle increased wakefulness and rapid eye movement (REM) sleep latency, whereas slow wave sleep, REM sleep and the number of REM periods were reduced. MDL 72222 (0.1-1.0 mg/kg, s.c.) induced a delayed and dose-dependent increase of slow wave sleep. Pretreatment with MDL 72222 (0.1-0.5 mg/kg) prevented the effects of m-chlorophenylbiguanide (50 micrograms) on wakefulness and sleep. It is suggested that the increase of wakefulness after 5-HT3 receptor activation could be related to the release of endogenous serotonin and dopamine.

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Year:  1993        PMID: 8287912     DOI: 10.1016/0014-2999(93)90520-r

Source DB:  PubMed          Journal:  Eur J Pharmacol        ISSN: 0014-2999            Impact factor:   4.432


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