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A2A adenosine receptor agonists reduce both high-palatability and low-palatability food intake in female rats.
MedLine Citation:
PMID:  22743606     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The present study examined the effect of two A2A adenosine receptor (AR) agonists, CGS 21680 and VT 7, on high-palatability food (HPF) intake in a model of binge eating in sated rats and on low-palatability food (LPF) intake in food-deprived rats. Binge eating was induced in female rats by three 8-day cycles of food restriction/refeeding, followed by acute stress. Two groups of rats were used: NR+NS rats normally fed and not stressed and R+S rats exposed to cycles of food restriction/refeeding and then stressed. R+S rats had higher intake of HPF than the NR+NS controls. The two A2AAR agonists were tested at doses of 0.1 and 0.05 mg/kg intraperitoneally; VT 7 did not modify locomotor activity at either dose, whereas CGS 21680 only slightly reduced it at the higher dose tested. The injection of 0.1 mg/kg of both agonists markedly reduced HPF intake both in R+S and in NR+NS rats. The dose of 0.05 mg/kg was inactive. CGS 21680 and VT 7, 0.1 mg/kg, also reduced the standard LPF intake in 24 h food-deprived rats; however, they did not reduce water intake, indicating that their effect on food intake is selective. The dose of 0.05 mg/kg was inactive. Thus, A2AAR agonists exert a rather general effect on food intake, inhibiting both HPF intake in sated rats and LPF intake in food-deprived rats. They may potentially be useful pharmacological agents to control binge-related eating disorders and to reduce food overconsumption associated with obesity.
Authors:
Maria V Micioni Di Bonaventura; Carlo Cifani; Catia Lambertucci; Rosaria Volpini; Gloria Cristalli; Maurizio Massi
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-27
Journal Detail:
Title:  Behavioural pharmacology     Volume:  -     ISSN:  1473-5849     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9013016     Medline TA:  Behav Pharmacol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
aSchool of Pharmacy, Pharmacology Unit bMedicinal Chemistry Unit, University of Camerino, Camerino, Italy.
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