Psychopharmacology

, Volume 208, Issue 3, pp 417–426

Neuropeptide Y (NPY) suppresses yohimbine-induced reinstatement of alcohol seeking

  • Andrea Cippitelli
  • Ruslan Damadzic
  • Anita C. Hansson
  • Erick Singley
  • Wolfgang H. Sommer
  • Robert Eskay
  • Annika Thorsell
  • Markus Heilig
Original Investigation

DOI: 10.1007/s00213-009-1741-y

Cite this article as:
Cippitelli, A., Damadzic, R., Hansson, A.C. et al. Psychopharmacology (2010) 208: 417. doi:10.1007/s00213-009-1741-y

Abstract

Introduction

Reinstatement of responding to a previously alcohol-associated lever following extinction is an established model of relapse-like behavior and can be triggered by stress exposure. Here, we examined whether neuropeptide Y (NPY), an endogenous anti-stress mediator, blocks reinstatement of alcohol-seeking induced by the pharmacological stressor yohimbine.

Materials and methods

NPY [5.0 or 10.0 μg/rat, intracerebroventricularly (ICV)] dose-dependently blocked the reinstatement of alcohol seeking induced by yohimbine (1.25 mg/kg, i.p.) but failed to significantly suppress the maintenance of alcohol self-administration. We then used c-fos expression mapping to examine neuronal activation following treatment with yohimbine or NPY alone or yohimbine following NPY pre-treatment.

Results and discussion

The analysis was focused on a network of structures previously implicated in yohimbine-induced reinstatement, comprised of central (CeA) and basolateral (BLA) amygdala and the shell of the nucleus accumbens (Nc AccS). Within this network, both yohimbine and NPY potently induced neuronal activation, and their effects were additive, presumably indicating activation of excitatory and inhibitory neuronal populations, respectively.

Conclusion

These results suggest that NPY selectively suppresses relapse to alcohol seeking induced by stressful events and support the NPY system as an attractive target for the treatment of alcohol addiction.

Keywords

YohimbineReinstatementAlcohol seekingc-fosNPYRelapse

Copyright information

© US Government 2009

Authors and Affiliations

  • Andrea Cippitelli
    • 1
  • Ruslan Damadzic
    • 1
  • Anita C. Hansson
    • 1
    • 2
  • Erick Singley
    • 1
  • Wolfgang H. Sommer
    • 1
    • 2
  • Robert Eskay
    • 1
  • Annika Thorsell
    • 1
  • Markus Heilig
    • 1
  1. 1.Laboratory of Clinical and Translational Studies, National Institute of Alcohol Abuse and Alcoholism (NIAAA)National Institutes of Health (NIH)BethesdaUSA
  2. 2.Department of PsychopharmacologyUniversity of HeidelbergMannheimGermany