Cocaine withdrawal-induced trafficking of delta-opioid receptors in rat nucleus accumbens.

Brain Research
Lisa M Ambrose-LanciElisabeth J Van Bockstaele

Abstract

Interactions between the opioidergic and dopaminergic systems in the nucleus accumbens (NAcb) play a critical role in mediating cocaine withdrawal-induced effects on cell signaling and behavior. In support of this, increased activation of striatal dopamine-D1 receptors (D1R) results in desensitization of delta-opioid receptor (DOR) signaling through adenylyl cyclase during early cocaine withdrawal. A potential cellular substrate underlying receptor desensitization is receptor internalization. The present study examined the effect of cocaine withdrawal on subcellular localization of DOR in dendrites of the NAcb core (NAcbC) and shell (NAcbS) using immunoelectron microscopy. Female and male rats received binge-pattern cocaine or saline for 14 days and subsequently underwent 48 h withdrawal. Animals were transcardially perfused and tissue sections were processed for immunogold-silver localization of DOR. Semi-quantitative analysis revealed that cocaine withdrawal caused an increase in the percentage of DOR localized intracellularly in the NAcbS of male and female rats and the NAcbC of male rats compared to saline controls. In contrast, in the NAcbC of female rats, there was an increase in DOR associated with the plasma membrane fo...Continue Reading

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Citations

Mar 13, 2009·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Diana Simmons, David W Self
Feb 4, 2012·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Vincent LaurentBernard W Balleine
Oct 27, 2009·Progress in Neurobiology·Xu ZhangGuo-Qiang Ma
Oct 2, 2009·Peptides·Richard J Bodnar
Mar 6, 2012·Biochemical and Biophysical Research Communications·Fernanda M DalioVitor Oliveira
Mar 13, 2015·Nicotine & Tobacco Research : Official Journal of the Society for Research on Nicotine and Tobacco·Oscar V TorresLaura E O'Dell
Jun 28, 2016·Pharmacological Reviews·Louis GendronGraciela Pineyro
Dec 24, 2019·The International Journal of Neuropsychopharmacology·Krista L Connelly, Ellen M Unterwald

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