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Investigations of the endocannabinoid system in adipose tissue.
MedLine Citation:
PMID:  21466769     Owner:  NLM     Status:  In-Data-Review    
Obesity is a world wide epidemic; it is becoming more usual to be overweight or obese than to be normal weight. Obesity increases the risk of an extensive range of diseases such as cardiovascular disease, diabetes mellitus type 2, hypertension, depression and some types of cancer. Adipose tissue is more than a storage organ for surplus energy - it is also a setting for complex metabolic processes and adipose tissue releases substances that interact with other parts of the body to influence several systems including food intake and energy metabolism. The endocannabinoid system (ECS) is one of the signalling systems that control feeding behaviour. The ECS is implicated in many functions, such as pain, memory, addiction, inflammation, and feeding, and could be considered a stress recovery system. It also seems to integrate nutrient intake, metabolism and storage maintaining homeostatic balance. The ECS is a recently discovered system, and research indicates hyperactivity in obesity. The aim of this thesis is to elaborate on the relationships of this widespread system and its elements in adipose tissue in obesity. Study I is a 4 weeks rat intervention study to investigate whether weight independent effect of Rimonabant treatment exists. We found that food intake-tolerance development could be circumvented by cyclic administration of Rimonabant and implications of weight independent effects of treatment. Study II is a cross-sectional study to establish the expression of cannabinoid receptor 1 from various adipose tissue depots of lean and obese persons. In this study we conclude, that the subcutaneous adipose tissue express more CBR1 than the visceral depot in lean, but comparable levels in obese. Study III is a 10 weeks human intervention study to asses the effects on the ECS of 10% weight loss. We found reduction in the ECS in obesity that normalised with weight loss. Our results clearly show the presence of all the components of the ECS in human adipose tissue, and suggest that the ECS is reduced in adipose tissue in obesity. Our results do not support the hypothesis of hyperactivity of the ECS in human obesity. Possible future treatment of obesity with CBR1 antagonist could involve cyclic treatment of specific peripheral compounds.
Marianne Faurholt Bennetzen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Danish medical bulletin     Volume:  58     ISSN:  1603-9629     ISO Abbreviation:  Dan Med Bull     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-04-06     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0066040     Medline TA:  Dan Med Bull     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  B4269     Citation Subset:  IM    
Department of Internal Medicine and Endocrinology, MEA, Aarhus University Hospital, Tage-Hansens Gade 2, 8000 Aarhus, Denmark.
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