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  • Title: Effects of 5-HT in globus pallidus on haloperidol-induced catalepsy in rats.
    Author: Wei L, Chen L.
    Journal: Neurosci Lett; 2009 Apr 17; 454(1):49-52. PubMed ID: 19429052.
    Abstract:
    Histological, behavioral and electrophysiological studies have suggested that 5-HT may regulate motor function by affecting globus pallidus neurons activity. In this study, the effects of 5-HT in globus pallidus on haloperidol-induced catalepsy and its possible receptor mechanisms were examined in rats using bar tests. Bilateral microinjection of 5-HT (10microM) into globus pallidus significantly attenuated haloperidol-induced catalepsy. This anticataleptic effect was completely counteracted by selective 5-HT(1B) receptors antagonist SB-224289 (10microM), while partly reversed by selective 5-HT(4) receptors antagonist GR-113808 (1microM). In addition, the selective 5-HT(7) receptors antagonist SB-269970 (1microM) partly reversed the anticataleptic effect of 5-HT only at the incipient period after the intrapallidal injection. In conclusion, 5-HT in globus pallidus could attenuate haloperidol-induced catalepsy via multiple receptor mechanisms.
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