Identification de biomarqueurs du syndrome métabolique par une approche métabolomique chez l'humain

Authors: Boulet, Marie Michèle
Advisor: Tchernof, André
Abstract: Metabolomic profiling of obese individuals revealed high blood levels of branched-chain amino acids (BCAA) possibly linked to altered adipose tissue BCAA catabolism. We examined plasmatic AA profiling linked with visceral obesity and cardiometabolic risk factors as well as gene expression and protein abundance of BCAA-catabolizing enzymes in adipose tissue of lean-to-obese women. We showed that obese women had significantly higher circulating BCAA, glutamate and tyrosine levels. Moreover, circulating BCAA levels were positively related to glucose homeostasis variables in addition to total and subcutaneous adiposity markers while glutamate and C3 acylcarnitine levels were positively associated with visceral adipose tissue area and triglycerides. Obese women had lower expression and protein levels of BCAA-catabolizing enzymes in visceral adipose tissue specifically. The results of this study suggest that plasma concentrations of BCAA, tyrosine and glutamate are elevated in obese individuals. This could be associated with a reduction in expression and protein abundance of BCAA-catabolizing enzymes mainly observed in omental adipose tissue of obese individuals.
Document Type: Mémoire de maîtrise
Issue Date: 2014
Open Access Date: 20 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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