Abstract |
Compulsive drug use despite adverse consequences defines addiction. While mesolimbic dopamine signaling is sufficient to drive compulsion, psychostimulants such as cocaine also boost extracellular serotonin (5-HT) by inhibiting reuptake. We used SERT Met172 knockin (SertKI) mice carrying a transporter that no longer binds cocaine to abolish 5-HT transients during drug self-administration. SertKI mice showed an enhanced transition to compulsion. Conversely, pharmacologically elevating 5-HT reversed the inherently high rate of compulsion transition with optogenetic dopamine self-stimulation. The bidirectional effect on behavior is explained by presynaptic depression of orbitofrontal cortex–to–dorsal striatum synapses induced by 5-HT via 5-HT1B receptors. Consequently, in projection-specific 5-HT1B receptor knockout mice, the fraction of individuals compulsively self-administering cocaine was elevated.
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Authors | Yue Li, Linda D Simmler, Ruud Van Zessen, Jérôme Flakowski, Jin-Xia Wan, Fei Deng, Yu-Long Li, Katherine M Nautiyal, Vincent Pascoli, Christian Lüscher |
Journal | Science (New York, N.Y.)
(Science)
Vol. 373
Issue 6560
Pg. 1252-1256
(Sep 10 2021)
ISSN: 1095-9203 [Electronic] United States |
PMID | 34516792
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Chemical References |
- Receptor, Serotonin, 5-HT1B
- Serotonin Plasma Membrane Transport Proteins
- Serotonin
- Cocaine
- Dopamine
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Topics |
- Animals
- Cocaine
(administration & dosage)
- Cocaine-Related Disorders
(genetics, metabolism)
- Dopamine
(metabolism)
- Gene Knock-In Techniques
- Mice
- Mice, Knockout
- Optogenetics
- Receptor, Serotonin, 5-HT1B
(deficiency, metabolism)
- Serotonin
(metabolism)
- Serotonin Plasma Membrane Transport Proteins
(metabolism)
- Synaptic Transmission
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