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Synergistic effect of 5-HT1A and σ1 receptor activation on prefrontal dopaminergic transmission under circulating steroid deficiency
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hiramatsu, Naoki Ago, Yukio Hasebe, Shigeru Nishimura, Akira Matsuda, Toshio |
| Copyright Year | 2013 |
| Abstract | Serotonin (5-HT)1A and σ1 receptors have been implicated in psychiatric disorders. We previously found that combined 5-HT reuptake inhibition and σ1 receptor activation has a synergistic effect on prefrontal dopaminergic transmission in adrenalectomized/castrated mice lacking circulating steroid hormones. In the present study, we examined the mechanisms underlying this neurochemical synergism. Systemic administration of fluvoxamine, a selective 5-HT reuptake inhibitor with agonistic activity towards the σ1 receptor, increased prefrontal dopamine (DA) levels, and adrenalectomy/castration potentiated this fluvoxamine-induced increase in DA. This enhancement of DA release was blocked by WAY100635 (a 5-HT1A receptor antagonist), but not by ritanserin (a 5-HT2 receptor antagonist), azasetron (a 5-HT3 receptor antagonist) or SB269970 (a 5-HT7 receptor antagonist). Individually, osemozotan (a 5-HT1A receptor agonist) and (+)-SKF-10,047 (a σ1 receptor agonist) did not alter prefrontal monoamine levels in adrenalectomized/castrated and sham-operated mice differentially. In contrast, co-administration of these drugs increased prefrontal DA levels to a greater extent in adrenalectomized/castrated mice than in sham-operated animals. Furthermore, co-administration of osemozotan and (+)-SKF-10,047 increased expression of the neuronal activity marker c-Fos in the ventral tegmental area of adrenalectomized/castrated mice, but not in sham-operated animals. These findings suggest that combined activation of 5-HT1A and σ1 receptors has a synergistic effect on prefrontal dopaminergic transmission under circulating steroid deficiency, and that this interaction may play an important role in the regulation of the prefrontal DA system. |
| Starting Page | 53 |
| Ending Page | 61 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.neuropharm.2013.06.026 |
| PubMed reference number | 23851260 |
| Journal | Medline |
| Volume Number | 75 |
| Alternate Webpage(s) | https://api.elsevier.com/content/article/pii/S0028390813002955 |
| Alternate Webpage(s) | https://www.sciencedirect.com/science/article/pii/S0028390813002955?dgcid=api_sd_search-api-endpoint |
| Alternate Webpage(s) | https://doi.org/10.1016/j.neuropharm.2013.06.026 |
| Journal | Neuropharmacology |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
