ISSN:
1573-6903
Keywords:
Behavior
;
serotonin
;
DOI
;
8-OH-DPAT
;
5-HTP
;
depression
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Studies from this laboratory have demonstrated that administration of the selective 5-HT2/1C antagonist LY53857 can block 5-HTP-induced response suppression. To further investigate the serotonergic mechanisms involved in this effect, we decided to test the capacity of LY53857 to block response suppression induced with two selective 5-HT agonists. After a 15 minute baseline period, rats trained to press a lever for milk reinforcement on a VI 1′ schedule were given IP injections of 1.0 mg/kg DOI, or 1.0 mg/kg 8-OH-DPAT to induce response suppression. Subsequently, rats were injected with 1.0 mg/kg LY53857 1 hour prior to DOI- or 8-OH-DPAT-induced response suppression. Preinjections with LY53857 resulted in a 100% blockade of DOI-induced response suppression whereas the same dose did not block response suppression induced with 8-OH-DPAT. These results indicate that the 5-HTP-induced response suppression shows some pharmacological similarity to DOI-induced response suppression and may be mediated through 5-HT2 and/or 5-HT1C receptors.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00969896
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