Reference code: | PT/FB/BL-2016-030.04 |
Location: | BF-GMS
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Title:
| Nucleus accumbens medium spiny neurons subtypes signal both reward and aversion
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Publication year: | 2020
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URL:
| https://www.nature.com/articles/s41380-019-0525-y
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Abstract/Results: | ABSTRACT:
Deficits in decoding rewarding (and aversive) signals are present in several neuropsychiatric conditions such as depression
and addiction, emphasising the importance of studying the underlying neural circuits in detail. One of the key regions of the
reward circuit is the nucleus accumbens (NAc). The classical view on the field postulates that NAc dopamine receptor D1-
expressing medium spiny neurons (D1-MSNs) convey reward signals, while dopamine receptor D2-expressing MSNs (D2-
MSNs) encode aversion. Here, we show that both MSN subpopulations can drive reward and aversion, depending on their
neuronal stimulation pattern. Brief D1- or D2-MSN optogenetic stimulation elicited positive reinforcement and enhanced
cocaine conditioning. Conversely, prolonged activation induced aversion, and in the case of D2-MSNs, decreased cocaine
conditioning. Brief stimulation was associated with increased ventral tegmenta area (VTA) dopaminergic tone either directly
(for D1-MSNs) or indirectly via ventral pallidum (VP) (for D1- and D2-MSNs). Importantly, prolonged stimulation of either
MSN subpopulation induced remarkably distinct electrophysiological effects in these target regions. We further show that
blocking ?-opioid receptors in the VTA (but not in VP) abolishes the behavioral effects induced by D1-MSN prolonged
stimulation. In turn, blocking d-opioid receptors in the VP (but not in VTA) blocks the behavioral effects elicited by D2-
MSN prolonged stimulation. Our findings demonstrate that D1- and D2-MSNs can bidirectionally control reward and
aversion, explaining the existence of controversial studies in the field, and highlights that the proposed striatal functional
opposition needs to be reconsidered.
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Accessibility: | Document exists in file
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Language:
| eng
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Author:
| Soares-Cunha, C.
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Secondary author(s):
| Vasconcelos, N., Coimbra, B., Domingues, A. V., Silva, J. M., Loureiro-Campos, E., Gaspar, R., Sotiropoulos, I., Sousa, N., Rodrigues, A. J.
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Document type:
| Article
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Number of reproductions:
| 1
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Percentiles:
| 4
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Reference:
| Soares-Cunha, C., Vasconcelos, N., Coimbra, B., Domingues, A. V., Silva, J. M., Loureiro-Campos, E., ... Rodrigues, A. J. (2020). Nucleus accumbens medium spiny neurons subtypes signal both reward and aversion. Molecular Psychiatry, 25(12), 3241-3255. https://doi.org/10.1038/s41380-019-0484-3
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2-year Impact Factor: | 15.992|2020
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Times cited: | 98|2024-02-13
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Indexed document: | Yes
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Quartile: | Q1
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Keywords: | Nucleus accumbens / Reward
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Nucleus accumbens medium spiny neurons subtypes signal both reward and aversion |