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Biol Psychiatry. 2011 Jun 1;69(11):1083-90. doi: 10.1016/j.biopsych.2010.12.030. Epub 2011 Feb 21.

β-Adrenergic receptors enhance excitatory transmission in the bed nucleus of the stria terminalis through a corticotrophin-releasing factor receptor-dependent and cocaine-regulated mechanism.

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  • 1Neuroscience Graduate Program, Center Molecular Neuroscience, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA.

Abstract

BACKGROUND:

Evidence suggests that the noradrenergic and corticotrophin-releasing factor (CRF) systems play critical roles in relapse and stress-related behaviors. In particular, behavioral studies point to a serial signaling process initiated by β-adrenergic receptors that requires CRF receptor (CRFR)-dependent signaling in the bed nucleus of the stria terminalis (BNST) to produce stress-induced relapse to cocaine seeking.

METHODS:

We used whole cell patch clamp recordings from acutely prepared mouse brain slices to examine the actions of β-adrenergic receptors and CRFR1 on excitatory transmission in BNST. We examined the effects of agonists of these receptors in slices prepared from naive, sham, and cocaine-conditioned mice.

RESULTS:

β(1)-adrenergic receptor activation within the BNST produces an enhancement of excitatory synaptic transmission that requires CRFR1-dependent signaling. We show that chronic cocaine administration transiently disrupts β(1)-adrenergic- and CRFR1-dependent enhancement of glutamatergic transmission, that this disruption wanes with time, and that it can be reintroduced with a cocaine challenge.

CONCLUSIONS:

In total, these studies identify a circuit mechanism within the BNST that may play an important role in CRF- and norepinephrine-regulated behaviors.

Copyright © 2011 Society of Biological Psychiatry. Published by Elsevier Inc. All rights reserved.

PMID:
21334600
[PubMed - indexed for MEDLINE]
PMCID:
PMC3090515
Free PMC Article
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