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The effect of the 5-HT1A receptor agonist, 8-OH-DPAT, on motion-induced emesis in Suncus murinus.

By Farideh A. Javid and Robert J. Naylor


NoIn the present study we evaluated the role of 5-HT1A receptors in mediating the inhibitory action of 8-OH-DPAT, a 5-HT1A receptor agonist, in motion sickness in Suncus murinus. 8-OH-DPAT (0.1 mg/kg, i. p) attenuated motion-induced emesis which was associated with an increase in the latency of the onset to the first emetic episode. Pre-treatment with methysergide (a 5-HT1/2/7 receptor antagonist, 1.0 mg/kg, i. p.), WAY-100635 (a 5-HT1A receptor antagonist, 1.0 mg/kg, i. p.), SB269970A (a 5-HT7 receptor antagonist, 1.0 and 5.0 mg/kg, i. p.), ondansetron (a 5-HT3 receptor antagonist, 1.0 mg/kg, i. p) or GR13808 (a 5-HT4 receptor antagonist, 0.5 mg/kg, i. p) failed to modify the inhibitory action of 8-OH-DPAT on motion sickness. Furthermore, the application of either methysergide, WAY-100635, SB269970A, ondansetron or GR13808 alone had no effect on motion sickness in its own right. These data indicate that neither 5-HT1A nor any 5-HT2 receptor subtypes, 5-HT3, 5-HT4 and 5-HT7 receptors are likely to be involved in the inhibition of motion-induced emesis mediated by 8-OH-DPAT

Topics: Motion sickness, 8-OH-DPAT, Suncus murinus
Year: 2006
DOI identifier: 10.1016/j.pbb.2006.11.018
OAI identifier:
Provided by: Bradford Scholars
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