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Tonic regulation of satiety by 5-HT1B receptors in the mouse: converging evidence from behavioural and c-fos immunoreactivity studies
journal contribution
posted on 2023-06-07, 18:06 authored by Michelle Lee, Liz Somerville, Guy A Kennett, Colin Trevor Dourish, Pete CliftonPete CliftonActivation of 5-HT1B receptors is thought to play an important role in the inhibitory influence of serotonin on feeding behaviour and body weight in mammals. Earlier studies have shown that 5-HT1B-knockout (KO) mice eat more and are heavier than wild-type (WT) controls and that the selective 5-HT1B receptor agonist CP-94,253 reduces food intake in food-deprived mice. Here we characterize the behavioural effects of both CP-94,253 and the selective 5-HT1B receptor antagonist SB224289 on feeding and other behaviours within the behavioural satiety sequence, and also report a c-fos mapping study using CP-94,253. CP-94,253 produced a dose-dependent suppression of food intake with a profile consistent with a selective effect on feeding behaviour. These effects were absent or reduced in 5-HT1B-KO mice and in WT mice pretreated with SB224289. SB224289 administered alone enhanced food intake consistent with impaired satiation; a similar effect was apparent in 5-HT1B-KO mice compared to WT. CP-94,253 induced c-fos in a range of structures previously implicated in the expression of feeding behaviour. These results suggest that the activation of 5-HT1B receptors is an important component of endogenous satiation mechanisms in the mouse.
History
Publication status
- Published
Journal
European Journal of NeuroscienceISSN
0953-816XExternal DOI
Issue
11Volume
19Page range
3017-3025Pages
9.0Department affiliated with
- Psychology Publications
Notes
Senior author; first author was research assistant on BBSRC LINK project grant for which Clifton was PI. Remaining authors were industrial collaborators and a colleague.Full text available
- No
Peer reviewed?
- Yes