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The Role of Dopaminergic Receptors in the Behavioral Effects Induced by Lisuride in Male Rats

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Specialty Pharmacology
Date 1983 Jan 1
PMID 6408668
Citations 13
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Abstract

Lisuride increased the incidence of stretching and yawning (SY) as well as of penile erection (PE) and elicited stereotyped behavior (SB), aggressive behavior and mounting in male rats, depending on the dose used. SY was prevented by two dopaminergic antagonists, haloperidol and sulpiride, but not by methysergide, a serotoninergic antagonist, while PE was antagonized by all three drugs. With regard to SB, aggressive behavior and mounting, all three were suppressed by haloperidol; sulpiride, while partially antagonizing aggressiveness, failed to affect SB and mounting; methysergide did not significantly influence any of the three. This suggests that lisuride principally affects the dopaminergic system. Although further detailed studies are required to elucidate which type of the complex population of DA-receptors is involved in each kind of behavior, we suggest that SY at least is due to the activation by lisuride of presynaptic DA-receptors.

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