Effects of systemic 5-HT(1B) receptor compounds on ventral tegmental area intracranial self-stimulation thresholds in rats
by
Hayes DJ, Graham DA, Greenshaw AJ.
Centre for Neuroscience, 513 HMRC,
University of Alberta, Edmonton, AB, Canada T6G 2S2.
Eur J Pharmacol. 2009 Feb 14;604(1-3):74-8.

ABSTRACT

Serotonin 1B (5-HT(1B)) receptors may play a role in regulating motivation and reward-related behaviours. To date, no studies have investigated the effects of the highly selective 5-HT(1B) receptor agonist CP 94253, on the reward model of ventral tegmental area intracranial self-stimulation. The current study investigated the hypothesis that 5-HT(1B) receptors play an inhibitory role in ventral tegmental area ICSS. Using Sprague-Dawley rats, the effects of the selective 5-HT(1B) receptor agonist CP 94253 (0-5.0 mg/kg) and the 5-HT(1B/1D) receptor antagonist GR 127935 (10.0 mg/kg) were investigated in rats trained to respond for ventral tegmental area ICSS; results were compared using rate-frequency threshold analysis. The highest dose of CP 94253 (5.0 mg/kg) tested in ventral tegmental area ICSS produced an increase in rate-frequency thresholds without affecting maximal response rates. This effect was attenuated by GR 127935 which did not show any effects when administered alone. These results suggest that 5-HT(1B) receptors play an inhibitory role in regulating ventral tegmental area ICSS.

P11
5-HT1
5-HT2
5-HT3
5-HT4
5-HT1a
5-HT2c
Anpirtoline
Eltoprazine
Zolmitriptan
Knockout mice
5-HT2c/5-HT2b
5-HT1a v 5-HT1b
SSRIs and 5-HT1b
MDMA and 5-HT1a
MDMA and 5-HT1b
5-HT1b and reward
5-HT1b and anxiety
Aggression and serotonin
5-HT-moduline, serotonin and mood
5-HT1b inverse agonists as antidepressants
Extracellular serotonin and 5-HT1b blockade