Document Detail


Experience with activity based anorexia enhances conditioned taste aversion learning in rats.
MedLine Citation:
PMID:  20946908     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Activity based anorexia (ABA) is a model that mimics the self-starvation and hyperactivity features of anorexia nervosa (AN). This study investigated whether a history of ABA will enhance food avoidance learning and retard its extinction in female rats. We compared the acquisition and extinction of a conditioned taste aversion (CTA) in naive (ad lib with no access to RW), ABA, and pair-fed to the food intake of ABA (with access to a locked RW) female Sprague-Dawley rats. The CTA conditioning was conducted after the ABA and pair-fed rats had recovered to their pre-food restriction body weights. For the CTA learning, 0.3M sucrose consumption was followed by low doses LiCl (0.009M or 0.018M at 1.33ml/100g of body weight, IP) injection. The results revealed that the ABA rats acquired an aversion to sucrose significantly sooner than the naive controls. Furthermore, they completely avoided sucrose while the naive and pair-fed controls still sampled it by the end of 10 conditioning trials. When extinction was assessed by 1-bottle and 2-bottle tests, the ABA rats extinguished more slowly than the controls. However, the differences in sucrose aversion extinction between the ABA and control rats were only significant in the 1-bottle test. These data suggest that experience with AN-like behaviors results in an acquired aversion to a preferred food sooner and a longer retention of the negative food associations. These findings have implications for understanding the persistence of aberrant eating behaviors in eating disorders.
Authors:
Nu-Chu Liang; Nicholas T Bello; Timothy H Moran
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2010-10-12
Journal Detail:
Title:  Physiology & behavior     Volume:  102     ISSN:  1873-507X     ISO Abbreviation:  Physiol. Behav.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-03     Completed Date:  2011-04-07     Revised Date:  2013-07-03    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  51-7     Citation Subset:  IM    
Copyright Information:
2010 Elsevier Inc. All rights reserved.
Affiliation:
Department of Psychiatry and Behavioral Sciences, School of Medicine, the Johns Hopkins University, Baltimore, MD 21205, USA. nliang2@jhmi.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Anorexia Nervosa / psychology*
Avoidance Learning / physiology*
Conditioning, Classical / physiology*
Disease Models, Animal
Extinction, Psychological / physiology
Female
Food
Lithium Chloride
Motor Activity / physiology*
Rats
Rats, Sprague-Dawley
Sucrose
Grant Support
ID/Acronym/Agency:
R01 DK019302-34/DK/NIDDK NIH HHS
Chemical
Reg. No./Substance:
57-50-1/Sucrose; 7447-41-8/Lithium Chloride
Comments/Corrections

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