Body mass index-independent inflammation in omental adipose tissue associated with insulin resistance in morbid obesity
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Authors
Hardy, Olga T.Perugini, Richard A.
Nicoloro, Sarah M.
Gallagher-Dorval, Karen A.
Puri, Vishwajeet
Straubhaar, Juerg R.
Czech, Michael P.
Document Type
Journal ArticlePublication Date
2011-01-04Keywords
AdipocytesAdipose Tissue
Adult
*Body Mass Index
Chemokines
Female
Follow-Up Studies
Gene Expression
Humans
Inflammation
*Insulin Resistance
Male
Middle Aged
Obesity, Morbid
*Omentum
Polymerase Chain Reaction
RNA
Retrospective Studies
UMCCTS funding
Endocrinology, Diabetes, and Metabolism
Pediatrics
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Show full item recordAbstract
BACKGROUND: Obesity is a strong risk factor for resistance to insulin-mediated glucose disposal, a precursor of type 2 diabetes and other disorders. However, not all obese individuals are insulin resistant. We sought to identify the molecular pathways that might cause obesity-associated insulin resistance in humans by studying the morbidly obese who were insulin sensitive versus insulin resistant, thereby eliminating obesity as a variable. METHODS: Combining gene expression profiling with computational approaches, we determined the global gene expression signatures of omental and subcutaneous adipose tissue samples obtained from similarly obese patients undergoing gastric bypass surgery. RESULTS: Gene sets related to chemokine activity and chemokine receptor binding were identified as most highly expressed in the omental tissue from insulin-resistant compared with insulin-sensitive subjects, independent of the body mass index. These upregulated genes included chemokines (C-C motif) ligand 2, 3, 4, and 18 and interleukin-8/(CC-X motif) ligand 8 and were not differentially expressed in the subcutaneous adipose tissues between the 2 groups of subjects. Insulin resistance, but not the body mass index, was associated with increased macrophage infiltration in the omental adipose tissue, as was adipocyte size, in these morbidly obese subjects. CONCLUSION: Our findings have demonstrated that inflammation of the omental adipose tissue is strongly associated with insulin resistance in human obesity even in subjects with similar body mass index values. Published by Elsevier Inc. All rights reserved.Source
Surg Obes Relat Dis. 2011 Jan-Feb;7(1):60-7. Epub 2010 Jun 1. Link to article on publisher's siteDOI
10.1016/j.soard.2010.05.013Permanent Link to this Item
http://hdl.handle.net/20.500.14038/43196PubMed ID
20678967Related Resources
Link to Article in PubMedae974a485f413a2113503eed53cd6c53
10.1016/j.soard.2010.05.013