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Coaggregation, Cointernalization, and Codesensitization of Adenosine A2A Receptors and Dopamine D2Receptors

Open access
Hillion, Joëlle, Canals, Meritxell, Torvinen, Maria, Casadó, Vicent, Scott, Rizaldy, Terasmaa, Anton, Hansson, Anita, Watson, Stanley, Olah, Mark E., Mallol, Josefa, Canela, Enric I., Zoli, Michele, Agnati, Luigi F., Ibáñez, Carlos F., Lluis, Carme, Franco, Rafael, Ferré, Sergi, Fuxe, Kjell·2002·Journal of Biological Chemistry

Abstract

Antagonistic and reciprocal interactions are known to exist between adenosine and dopamine receptors in the striatum. In the present study, double immunofluorescence experiments with confocal laser microscopy showed a high degree of colocalization of adenosine A(2A) receptors (A(2A)R) and dopamine D(2) receptors (D(2)R) in cell membranes of SH-SY5Y human neuroblastoma cells stably transfected with human D(2)R and in cultured striatal cells. A(2A)R/D(2)R heteromeric complexes were demonstrated in coimmunoprecipitation experiments in membrane preparations from D(2)R-transfected SH-SY5Y cells and from mouse fibroblast Ltk(-) cells stably transfected with human D(2)R (long form) and transiently cotransfected with the A(2A)R double-tagged with hemagglutinin. Long term exposure to A(2A)R and D(2)R agonists in D(2)R-cotransfected SH-SY5Y cells resulted in coaggregation, cointernalization and codesensitization of A(2A)R and D(2)R. These results give a molecular basis for adenosine-dopamine antagonism at the membrane level and have implications for treatment of Parkinson's disease and schizophrenia, in which D(2)R are involved.

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Metadata

Authors
Hillion, J., Canals, M., Torvinen, M., Casadó, V., Scott, R., Terasmaa, A., Hansson, A., Watson, S., Olah, M. E., Mallol, J., Canela, E. I., Zoli, M., Agnati, L. F., Ibáñez, C. F., Lluis, C., Franco, R., Ferré, S., & Fuxe, K.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-05
Volume
277
Issue
20
Pages
18091-18097
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2107730819
Cited by
500
References
0
FWCI
9.83
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Coaggregation, Cointernalization, and Codesensitization of Adenosine A2A Receptors and Dopamine D2Receptors. https://app.cochat.ai/papers/10.1074/jbc.m107731200
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Hillion, J., Canals, M., Torvinen, M., Casadó, V., Scott, R., Terasmaa, A., Hansson, A., Watson, S., Olah, M. E., Mallol, J., Canela, E. I., Zoli, M., Agnati, L. F., Ibáñez, C. F., Lluis, C., Franco, R., Ferré, S., & Fuxe, K. (2002). Coaggregation, Cointernalization, and Codesensitization of Adenosine A2A Receptors and Dopamine D2Receptors. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m107731200

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