| Title |
RU 24969, a 5-HT1A/1B agonist, elevates brain stimulation reward thresholds: an effect reversed by GR 127935, a 5-HT1B/1D antagonist
|
|---|---|
| Published in |
Psychopharmacology, January 1999
|
| DOI | 10.1007/s002130050831 |
| Pubmed ID | |
| Authors |
A. A. Harrison, Loren H. Parsons, George F. Koob, Athina Markou |
| Abstract |
Recent studies suggest that serotonergic neurotransmission through the serotonin-1B (5-HT1B) receptor is involved in reward processes. The purpose of the present studies was to investigate the effects of 5-HT(1B) receptor activation and antagonism on intracranial self-stimulation (ICSS) reward using a current-threshold ICSS task. Male Wistar rats were prepared with bipolar electrodes in the lateral hypothalamus. When stable baseline thresholds were established, the effects of the mixed 5-HT(1A)/1B receptor agonist, RU 24969 (0-1 mg/kg, SC), on ICSS behavior were assessed. Administration of this compound elevated ICSS thresholds without affecting response latencies, a measure of general motoric activity. The 5-HT(1B/1D) receptor antagonist, GR 127935 (0-10 mg/kg, SC), had no significant effect on ICSS behavior. However, pretreatment with an intermediate dose of GR 127935 (3 mg/kg), which was previously without effect on ICSS behavior, reversed the threshold-elevating effects of RU 24969 (1 mg/kg), suggesting the involvement of the 5-HT1B receptor in this effect of RU 24969 administration. Furthermore, pretreatment with RU 24969 (0.3 and 0.6 mg/kg), prior to 10 mg/kg cocaine hydrochloride, dose-dependently attenuated the threshold-reducing effects of cocaine. This result is interpreted as two opposing drug effects canceling each other out rather than a specific pharmacological antagonism. In conclusion, the results suggest that activation of 5-HT(1B) receptors reduces brain stimulation reward. |
Mendeley readers
The data shown below were compiled from readership statistics for 29 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Argentina | 2 | 7% |
| United Kingdom | 1 | 3% |
| Unknown | 26 | 90% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 5 | 17% |
| Student > Ph. D. Student | 4 | 14% |
| Professor | 3 | 10% |
| Student > Doctoral Student | 3 | 10% |
| Professor > Associate Professor | 3 | 10% |
| Other | 4 | 14% |
| Unknown | 7 | 24% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 7 | 24% |
| Psychology | 5 | 17% |
| Neuroscience | 3 | 10% |
| Biochemistry, Genetics and Molecular Biology | 1 | 3% |
| Decision Sciences | 1 | 3% |
| Other | 3 | 10% |
| Unknown | 9 | 31% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 08 March 2024.
All research outputs
#8,534,976
of 25,373,627 outputs
Outputs from Psychopharmacology
#2,227
of 5,320 outputs
Outputs of similar age
#24,657
of 109,585 outputs
Outputs of similar age from Psychopharmacology
#19
of 34 outputs
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