Alcohol and Alcoholism Advance Access published online on October 13, 2009
Alcohol and Alcoholism, doi:10.1093/alcalc/agp065
Augmented Stress-Induced Alcohol Drinking and Withdrawal in Mice Lacking Functional Natriuretic Peptide-A Receptors


1 Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health, University of Heidelberg, J 5, 68159 Mannheim, Germany;
2 Department of Psychopharmacology, Central Institute of Mental Health, University of Heidelberg, J 5, 68159 Mannheim, Germany
3 Department of Psychiatry and Psychotherapy, University of Hamburg, Martinistr. 51 20241 Hamburg, Germany
* Corresponding author: Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health, University of Heidelberg, J 5, 68159 Mannheim, Germany. Tel: +49-621-1703-3803; Fax: +49-621-1703-3505. E-mail: jochen.mutschler{at}zi-mannheim.de
Received 23 June 2009; first review notified 24 July 2009; in revised form 29 July 2009; accepted 28 August 2009
| Abstract |
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Aims: Preclinical and clinical data suggest an involvement of atrial natriuretic peptides (ANP) in alcohol-associated psychopathology. We now present first data on alcohol drinking behaviour in mice lacking a functional natriuretic peptide-A (NPR-A) receptor. Methods: NPR-A–/– and wild-type mice were given a free choice between water and increasing concentrations of alcohol (2–16%). A forced swim stress was performed thereafter on three consecutive days to investigate stress-induced alcohol drinking. Additionally, neurobehavioural alcohol withdrawal response was investigated following 14 days of forced-alcohol intake. Results: Whereas basal alcohol intake did not differ between NPR-A mutants and wild-type littermates, NPR-A mutants showed an increased stress-induced alcohol intake and aggravated neurobehavioural symptoms of alcohol withdrawal. Conclusions: Mice lacking a functional NPR-A receptor represent a useful model to study the role of the ANP system in alcohol-associated pathology. To study the role of the natriuretic NPR-A gene for the modulation of risk of alcohol-related disorders, NPR-A-related polymorphisms should be targeted in clinical studies.
These authors contributed equally to this work.