Cited by 68Neuropeptides and Animal PhysiologyNeurotransmitter Receptor Influence on BehaviorRegulation of Appetite and Obesity

Dynorphin-kappa opioid receptor activity in the central amygdala modulates binge-like alcohol drinking in mice

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Anderson, Rachel I., Lopez, Marcelo F., Griffin, William C., Haun, Harold L., Bloodgood, Daniel W., Pati, Dipanwita, Boyt, Kristen M., Kash, Thomas L. +1 more·2019·Neuropsychopharmacology

Abstract

Although previous research has demonstrated a role for kappa opioid receptor-mediated signaling in escalated alcohol consumption associated with dependence and stress exposure, involvement of the dynorphin/kappa opioid receptor (DYN/KOR) system in binge-like drinking has not been fully explored. Here we used pharmacological and chemogenetic approaches to examine the influence of DYN/KOR signaling on alcohol consumption in the drinking-in-the-dark (DID) model of binge-like drinking. Systemic administration of the KOR agonist U50,488 increased binge-like drinking (Experiment 1) while, conversely, systemic administration of the KOR antagonist nor-BNI reduced drinking in the DID model (Experiment 2). These effects of systemic KOR manipulation were selective for alcohol as neither drug influenced consumption of sucrose in the DID paradigm (Experiment 3). In Experiment 4, administration of the long-acting KOR antagonist nor-BNI into the central nucleus of the amygdala (CeA) decreased alcohol intake. Next, targeted "silencing" of DYN+ neurons in the CeA was accomplished using a chemogenetic strategy. Cre-dependent viral expression in DYN+ neurons was confirmed in CeA of Pdyn-IRES-Cre mice and functionality of an inhibitory (hM4Di) DREADD was validated (Experiment 5). Activating the inhibitory DREADD by CNO injection reduced binge-like alcohol drinking, but CNO injection did not alter alcohol intake in mice that were treated with control virus (Experiment 6). Collectively, these results demonstrate that DYN/KOR signaling in the CeA contributes to excessive alcohol consumption in a binge-drinking model.

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  1. [2]2. NIAAA NIoAAaA. National Institute on Alcohol Abuse and Alcoholism Council approves definition of binge drinking. NIAAA Newsl. 2004;3:3.

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Authors
Anderson, R. I., Lopez, M. F., Griffin, W. C., Haun, H. L., Bloodgood, D. W., Pati, D., Boyt, K. M., Kash, T. L., & Becker, H. C.
Affiliations
  • Medical University of South Carolina (US)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
Becker, Howard C.
Venue
Neuropsychopharmacology
Published
2018-12-11
Volume
44
Issue
6
Pages
1084-1092
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2903920169
Cited by
68
References
60
Citations by year
2026: 4 · 2025: 5 · 2024: 8 · 2023: 8 · 2022: 12 · 2021: 17 · 2020: 10 · 2019: 3 · 2018: 1
FWCI
3.53
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Health & Human Services | NIH | National Institute on Alcohol Abuse and Alcoholism (F32 AA023700, T32 AA007474, P50 AA10716, U01 AA014095, F31 AA025835, P60 AA011605, U24 AA025475)
  • U.S. Department of Veterans Affairs (BX 000813)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
dynorphin, kappa opioid receptor, central amygdala, U50,488, nor-binaltorphimine, chemogenetic silencing, DREADD, alcoholism, stress exposure
MeSH terms
Animals, Behavior, Animal, Disease Models, Animal, Dynorphins, Genetic Techniques, Male, Mice, Inbred C57BL, Naltrexone, Receptors, Opioid, kappa, 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer, Mice, Binge Drinking, Central Amygdaloid Nucleus

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