Opposing roles for serotonin in cholinergic neurons of the ventral and dorsal striatum.
| Publication Type | Academic Article |
| Authors | Virk M, Sagi Y, Medrihan L, Leung J, Kaplitt M, Greengard P |
| Journal | Proc Natl Acad Sci U S A |
| Volume | 113 |
| Issue | 3 |
| Pagination | 734-9 |
| Date Published | 01/05/2016 |
| ISSN | 1091-6490 |
| Keywords | Cholinergic Neurons, Neostriatum, Serotonin |
| Abstract | Little is known about the molecular similarities and differences between neurons in the ventral (vSt) and dorsal striatum (dSt) and their physiological implications. In the vSt, serotonin [5-Hydroxytryptamine (5-HT)] modulates mood control and pleasure response, whereas in the dSt, 5-HT regulates motor behavior. Here we show that, in mice, 5-HT depolarizes cholinergic interneurons (ChIs) of the dSt whereas hyperpolarizing ChIs from the vSt by acting on different 5-HT receptor isoforms. In the vSt, 5-HT1A (a postsynaptic receptor) and 5-HT1B (a presynaptic receptor) are highly expressed, and synergistically inhibit the excitability of ChIs. The inhibitory modulation by 5-HT1B, but not that by 5-HT1A, is mediated by p11, a protein associated with major depressive disorder. Specific deletion of 5-HT1B from cholinergic neurons results in impaired inhibition of ACh release in the vSt and in anhedonic-like behavior. |
| DOI | 10.1073/pnas.1524183113 |
| PubMed ID | 26733685 |
| PubMed Central ID | PMC4725497 |