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Direct involvement of σ-1 receptors in the dopamine D 1 receptor-mediated effects of cocaine

Open access
Navarro, Gemma, Moreno, Estefanía, Aymerich, Marisol, Marcellino, Daniel, McCormick, Peter J., Mallol, Josefa, Cortés, Antoni, Casadó, Vicent, Canela, Enric I., Ortiz, Jordi, Fuxe, Kjell, Lluís, Carmen, Ferré, Sergi, Franco, Rafael·2010·Proceedings of the National Academy of Sciences

Abstract

It is well known that cocaine blocks the dopamine transporter. This mechanism should lead to a general increase in dopaminergic neurotransmission, and yet dopamine D 1 receptors (D 1 Rs) play a more significant role in the behavioral effects of cocaine than the other dopamine receptor subtypes. Cocaine also binds to σ-1 receptors, the physiological role of which is largely unknown. In the present study, D 1 R and σ 1 R were found to heteromerize in transfected cells, where cocaine robustly potentiated D 1 R-mediated adenylyl cyclase activation, induced MAPK activation per se and counteracted MAPK activation induced by D 1 R stimulation in a dopamine transporter-independent and σ 1 R-dependent manner. Some of these effects were also demonstrated in murine striatal slices and were absent in σ 1 R KO mice, providing evidence for the existence of σ 1 R-D 1 R heteromers in the brain. Therefore, these results provide a molecular explanation for which D 1 R plays a more significant role in the behavioral effects of cocaine, through σ 1 R-D 1 R heteromerization, and provide a unique perspective toward understanding the molecular basis of cocaine addiction.

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Crossref · 10.1073/pnas.1008911107

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Metadata

Authors
Navarro, G., Moreno, E., Aymerich, M., Marcellino, D., McCormick, P. J., Mallol, J., Cortés, A., Casadó, V., Canela, E. I., Ortiz, J., Fuxe, K., Lluís, C., Ferré, S., & Franco, R.
Venue
Proceedings of the National Academy of Sciences
Published
2010-10-18
Volume
107
Issue
43
Pages
18676-18681
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2088872562
Cited by
171
References
1
FWCI
3.43
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Direct involvement of σ-1 receptors in the dopamine D 1 receptor-mediated effects of cocaine. https://app.cochat.ai/papers/10.1073/pnas.1008911107
The paper
Navarro, G., Moreno, E., Aymerich, M., Marcellino, D., McCormick, P. J., Mallol, J., Cortés, A., Casadó, V., Canela, E. I., Ortiz, J., Fuxe, K., Lluís, C., Ferré, S., & Franco, R. (2010). Direct involvement of σ-1 receptors in the dopamine D 1 receptor-mediated effects of cocaine. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1008911107

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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