DARPP-32 and regulation of the ethanol sensitivity of NMDA receptors in the nucleus accumbens

The medium spiny neurons of the nucleus accumbens receive both an excitatory glutamatergic input from forebrain and a dopaminergic input from the ventral tegmental area. This integration point may constitute a locus whereby the N -methyl- D -aspartate (NMDA)-subtype of glutamate receptors promotes d...

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Veröffentlicht in:Nature neuroscience 2002-07, Vol.5 (7), p.641-648
Hauptverfasser: Maldve, R. E., Zhang, T. A., Ferrani-Kile, K., Schreiber, S. S., Lippmann, M. J., Snyder, G. L., Fienberg, A. A., Leslie, S. W., Gonzales, R. A., Morrisett, R. A.
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container_end_page 648
container_issue 7
container_start_page 641
container_title Nature neuroscience
container_volume 5
creator Maldve, R. E.
Zhang, T. A.
Ferrani-Kile, K.
Schreiber, S. S.
Lippmann, M. J.
Snyder, G. L.
Fienberg, A. A.
Leslie, S. W.
Gonzales, R. A.
Morrisett, R. A.
description The medium spiny neurons of the nucleus accumbens receive both an excitatory glutamatergic input from forebrain and a dopaminergic input from the ventral tegmental area. This integration point may constitute a locus whereby the N -methyl- D -aspartate (NMDA)-subtype of glutamate receptors promotes drug reinforcement. Here we investigate how dopaminergic inputs alter the ethanol sensitivity of NMDA receptors in rats and mice and report that previous dopamine receptor-1 (D1) activation, culminating in dopamine and cAMP-regulated phosphoprotein-32 kD (DARPP-32) and NMDA receptor subunit-1 (NR1)-NMDA receptor phosphorylation, strongly decreases ethanol inhibition of NMDA responses. The regulation of ethanol sensitivity of NMDA receptors by D1 receptors was absent in DARPP-32 knockout mice. We propose that DARPP-32 mediated blunting of the response to ethanol subsequent to activation of ventral tegmental area dopaminergic neurons initiates molecular alterations that influence synaptic plasticity in this circuit, thereby promoting the development of ethanol reinforcement.
doi_str_mv 10.1038/nn877
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subjects 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine - pharmacology
Animal Genetics and Genomics
Animals
Behavioral Sciences
Biological Techniques
Biomedical and Life Sciences
Biomedicine
Cell nuclei
Cyclic AMP - metabolism
Cyclic AMP-Dependent Protein Kinases - metabolism
Dopamine - metabolism
Dopamine Agonists - pharmacology
Dopamine and cAMP-Regulated Phosphoprotein 32
Ethanol - pharmacology
In Vitro Techniques
Mice
Mice, Knockout
Nerve Tissue Proteins
Neurobiology
Neuronal Plasticity - drug effects
Neuronal Plasticity - physiology
Neurosciences
Neurotransmitter receptors
Nucleus Accumbens - cytology
Nucleus Accumbens - drug effects
Nucleus Accumbens - metabolism
Phosphoproteins - deficiency
Phosphoproteins - genetics
Phosphoproteins - metabolism
Phosphorylation - drug effects
Physiological aspects
Rats
Receptors, Dopamine D1 - metabolism
Receptors, N-Methyl-D-Aspartate - antagonists & inhibitors
Receptors, N-Methyl-D-Aspartate - drug effects
Receptors, N-Methyl-D-Aspartate - metabolism
Ventral Tegmental Area - physiology
title DARPP-32 and regulation of the ethanol sensitivity of NMDA receptors in the nucleus accumbens
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