Document Detail


Increased postprandial fatty acid trapping in subcutaneous adipose tissue in obese women.
MedLine Citation:
PMID:  11108729     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The objective of this study was to test the hypothesis that increased fatty acid trapping by subcutaneous adipose tissue might contribute to the development and/or maintenance of obesity. To do so, venoarterial (V-A) gradients across subcutaneous adipose tissue for triglycerides, glycerol, nonesterified fatty acid (NEFA), and acylation-stimulating protein (ASP) were determined in eight lean females [body mass index (BMI), 22.2 +/- 0.6] and eight obese females (BMI, 34.4 +/- 3.4). Plasma insulin was also measured at intervals throughout this period. Fasting plasma triglyceride was significantly higher in the obese group and postprandial triglyceride was also significantly delayed. In contrast, both triglyceride clearance and fatty acid uptake by subcutaneous adipose tissue were significantly greater in the obese group compared with the lean group. Fasting insulin did not differ between the groups, but postprandial insulin values were significantly higher in the obese group. The pattern of ASP release from subcutaneous adipose tissue also appeared to differ in that it was significantly greater in the early postprandial period (0;-90 min) in the obese group versus the lean group and this correlated with greater triglyceride clearance during this period. Moreover, there were strong, positive correlations between BMI and the V-A gradient for fasting ASP, the 0- to 90-min area under the curve (AUC) for ASP V-A gradient fasting insulin, and the 0- to 90-min AUC for fatty acid incorporation into adipose tissue. Taken together, these data demonstrate that fatty acid trapping by adipose tissue can be increased even when overall plasma triglyceride clearance is delayed. The postprandial pattern of insulin, in particular, was altered in the obese, although it is certainly possible that differences in ASP release or response could also contribute to increased fatty acid trapping in the obese. The data, therefore, suggest that increased fatty acid trapping by adipose tissue may be a feature of some forms of obesity.
Authors:
D Kalant; S Phélis; B A Fielding; K N Frayn; K Cianflone; A D Sniderman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of lipid research     Volume:  41     ISSN:  0022-2275     ISO Abbreviation:  J. Lipid Res.     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2001-01-16     Completed Date:  2001-03-01     Revised Date:  2009-11-03    
Medline Journal Info:
Nlm Unique ID:  0376606     Medline TA:  J Lipid Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1963-8     Citation Subset:  IM    
Affiliation:
Mike Rosenbloom Laboratory for Cardiovascular Research, McGill University Health Center, McGill University, Montreal, Quebec, Canada.
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue / metabolism*
Adult
Apolipoproteins B / blood
Fatty Acids / metabolism*
Female
Humans
Middle Aged
Obesity / metabolism*
Postprandial Period*
Chemical
Reg. No./Substance:
0/Apolipoproteins B; 0/Fatty Acids

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


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