Serotonin (5-HT) 2A receptor activation enhances dialysate levels of dopamine and noradrenaline, but not 5-HT, in the frontal cortex of freely-moving rats

Serotonin (5-HT) 2A receptor activation enhances dialysate levels of dopamine and noradrenaline,... The 5-HT 2 receptor agonist, DOI, dose-dependently (0.16–10.0 mg/kg, s.c.) increased dialysate levels of dopamine (DA) and noradrenaline (NA), but not 5-HT, in the frontal cortex (FCX) of freely-moving rats. This action was abolished by the selective 5-HT 2A antagonist, MDL100,907 (0.04), which did not, itself, modify levels of DA and NA. In contrast, the selective 5-HT 2B/2C antagonist, SB206,553 (0.63), increased levels of DA and NA additively with DOI. Thus, in contrast to a tonic, inhibitory influence of 5-HT 2C receptors (see Millan, M.J., Dekeyne, A., Gobert, A., 1998. Serotonin (5-HT) 2C receptors tonically inhibit dopamine (DA) and noradrenaline (NAD), but not 5-HT, release in the FCX in vivo. Neuropharmacology 37, 953–955), 5-HT 2A receptors exert a phasic, facilitatory influence upon FCX levels of DA and NA. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Neuropharmacology Elsevier

Serotonin (5-HT) 2A receptor activation enhances dialysate levels of dopamine and noradrenaline, but not 5-HT, in the frontal cortex of freely-moving rats

Neuropharmacology, Volume 38 (2) – Feb 1, 1999

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Publisher
Elsevier
Copyright
Copyright © 1999 Elsevier Science Ltd
ISSN
0028-3908
eISSN
1873-7064
DOI
10.1016/S0028-3908(98)00188-9
Publisher site
See Article on Publisher Site

Abstract

The 5-HT 2 receptor agonist, DOI, dose-dependently (0.16–10.0 mg/kg, s.c.) increased dialysate levels of dopamine (DA) and noradrenaline (NA), but not 5-HT, in the frontal cortex (FCX) of freely-moving rats. This action was abolished by the selective 5-HT 2A antagonist, MDL100,907 (0.04), which did not, itself, modify levels of DA and NA. In contrast, the selective 5-HT 2B/2C antagonist, SB206,553 (0.63), increased levels of DA and NA additively with DOI. Thus, in contrast to a tonic, inhibitory influence of 5-HT 2C receptors (see Millan, M.J., Dekeyne, A., Gobert, A., 1998. Serotonin (5-HT) 2C receptors tonically inhibit dopamine (DA) and noradrenaline (NAD), but not 5-HT, release in the FCX in vivo. Neuropharmacology 37, 953–955), 5-HT 2A receptors exert a phasic, facilitatory influence upon FCX levels of DA and NA.

Journal

NeuropharmacologyElsevier

Published: Feb 1, 1999

References

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