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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Methysergide blocks the sleep suppressant action of quipazine in rats.

The aim of the present study was to examine the effect of methysergide, a 5-hydroxytryptamine (5-HT) receptor antagonist, on the sleep suppression produced by the 5-HT receptor agonist, quipazine. Treatment with methysergide maleate (5 mg/kg, IP) 15 min before the administration of quipazine blocked quipazine-induced suppression of flow-wave sleep (SWS), but failed to prevent the decrease in rapid-eye-movement sleep (REMS) produced by quipazine. Treatment with methysergide also prevented the head-shaking behavior induced by quipazine, a phenomenon associated with increased activity of the central serotonergic system. Furthermore, it was shown that administration of methysergide alone (1 or 5 mg/kg, IP) had little effect on sleep or head-shaking behavior. The present data provide pharmacological evidence that the suppression of SWS but not REMS by quipazine may be a result of stimulation of 5-HT receptors.[1]

References

  1. Methysergide blocks the sleep suppressant action of quipazine in rats. Fornal, C., Radulovacki, M. Psychopharmacology (Berl.) (1982) [Pubmed]
 
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