Document Detail


A procedure for studying the footshock-induced reinstatement of cocaine seeking in laboratory rats.
MedLine Citation:
PMID:  21248699     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The most insidious aspect of drug addiction is the high propensity for relapse. Animal models of relapse, known as reinstatement procedures, have been used extensively to study the neurobiology and phenomenology of relapse to drug use. Although procedural variations have emerged over the past several decades, the most conventional reinstatement procedures are based on the drug self-administration (SA) model. In this model, an animal is trained to perform an operant response to obtain drug. Subsequently, the behavior is extinguished by withholding response-contingent reinforcement. Reinstatement of drug seeking is then triggered by a discrete event, such as an injection of the training drug, re-exposure to drug-associated cues, or exposure to a stressor. Reinstatement procedures were originally developed to study the ability of acute non-contingent exposure to the training drug to reinstate drug seeking in rats and monkeys. Reinstatement procedures have since been modified to study the role of environmental stimuli, including drug-associated cues and exposure to various forms of stress, in relapse to drug seeking. Over the past 15 years, a major focus of the reinstatement literature has been on the role of stress in drug relapse. One of the most commonly used forms of stress for studying this relationship is acute exposures to mild, intermittent, electric footshocks. The ability of footshock stress to induce reinstatement of drug seeking was originally demonstrated by Shaham and colleagues (1995) in rats with a history of intravenous heroin SA(5). Subsequently, the effect was generalized to rats with histories of intravenous cocaine, methamphetamine, and nicotine SA, as well as oral ethanol SA. Although footshock-induced reinstatement of drug seeking can be achieved reliably and robustly, it is an effect that tends to be sensitive to certain parametrical variables. These include the arrangement of extinction and reinstatement test sessions, the intensity and duration of footshock stress, and the presence of drug-associated cues during extinction and testing for reinstatement. Here we present a protocol for footshock-induced reinstatement of cocaine seeking that we have used with consistent success to study the relationship between stress and cocaine seeking.
Authors:
David A Kupferschmidt; Zenya J Brown; Suzanne Erb
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Publication Detail:
Type:  Journal Article; Video-Audio Media     Date:  2011-01-06
Journal Detail:
Title:  Journal of visualized experiments : JoVE     Volume:  -     ISSN:  1940-087X     ISO Abbreviation:  J Vis Exp     Publication Date:  2011  
Date Detail:
Created Date:  2011-01-20     Completed Date:  2011-02-23     Revised Date:  2013-02-20    
Medline Journal Info:
Nlm Unique ID:  101313252     Medline TA:  J Vis Exp     Country:  United States    
Other Details:
Languages:  eng     Pagination:  -     Citation Subset:  IM    
Affiliation:
Psychology, University of Toronto Scarborough.
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MeSH Terms
Descriptor/Qualifier:
Animals
Behavior, Addictive / physiopathology*
Cocaine / administration & dosage*
Conditioning, Operant / physiology*
Disease Models, Animal
Electroshock / methods*
Extinction, Psychological
Male
Rats
Rats, Inbred LEC
Recurrence
Stress, Psychological / physiopathology
Chemical
Reg. No./Substance:
50-36-2/Cocaine
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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