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D1 and D4 dopaminergic receptor interplay mediates coincident G protein-independent and dependent regulation of glutamate NMDA receptors in the lateral amygdala.

Authors: Martina, M  Bergeron, R 
Citation: Martina M and Bergeron R, J Neurochem. 2008 Sep;106(6):2421-35. doi: 10.1111/j.1471-4159.2008.05584.x. Epub 2008 Jul 24.
Pubmed: (View Article at PubMed) PMID:18662324
DOI: Full-text: DOI:10.1111/j.1471-4159.2008.05584.x

Dopamine (DA) receptor and NMDA receptor (NMDAR) activation in the lateral (LA) nucleus of the amygdala plays a critical role in emotional processing. Several distinct mechanisms regulate the molecular cross-talk between DA receptors and NMDARs in different brain regions; however, the cellular mechanism through which DA modulates NMDARs in LA projection neurons has not been studied. Here, we investigated the effect of DA receptor activation on NMDAR currents in LA projection neurons recorded in amygdala slices obtained from young rats. We found that DA reduces NMDAR current amplitudes in an additive manner through the activation of both D1-like and D2-like receptors. The reduction of NMDAR current amplitudes by D1-like receptor activation is mediated by a protein-protein interaction between the D1R and the NMDAR, while the regulation of NMDAR activity by D2-like receptors is elicited through a G protein-dependent pathway controlled by D4R. The results of our investigation show for the first time a functional interplay between D1R and D4R that mediates coincident G protein-independent and dependent regulation of NMDARs.


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CRRD Object Information
CRRD ID: 7248684
Created: 2013-08-15
Species: All species
Last Modified: 2013-08-15
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.