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Alterations of plasma metabolite profiles related to adipose tissue distribution and cardiometabolic risk.
Am. J. Physiol. Endocrinol. Metab. 309, E736-E746 (2015)
CONTEXT: Metabolomic profiling of obese individuals revealed altered concentrations of many metabolites, especially branched-chain amino acids (BCAA), possibly linked to altered adipose tissue BCAA catabolism. OBJECTIVE: We tested the hypothesis that some features of this metabolite signature relate closely to visceral obesity and concomitant alterations in cardiometabolic risk factors. We also postulated that alterations in BCAA-catabolizing enzymes are predominant in visceral adipose tissue. METHODS: Fifty-nine women (BMI 20-41 kg/m(2)) undergoing gynecologic surgery were recruited and characterized for overall and regional adiposity, blood metabolite levels using targeted metabolomics and cardiometabolic risk factors. Adipose samples (visceral and subcutaneous) were obtained and used for gene expression and western blot analyses. RESULTS: Obese women had significantly higher circulating BCAA and Kynurenine/Tryptophan (KYN/Trp) ratio than lean or overweight women (p<0.01). Principal component analysis confirmed that factors related to AA and the KYN/Trp ratio were positively associated with BMI, fat mass, visceral or subcutaneous adipose tissue area and subcutaneous adipocyte size (p≤0.05). AA-related factor was positively associated with HOMA-IR (p≤0.01). Factors reflecting glycerophospholipids and sphingolipids levels were mostly associated with altered blood lipid concentrations (p≤0.05). Glutamate level was the strongest independent predictor of visceral adipose tissue area (r=0.46, p<0.001). Obese women had lower expression and protein levels of BCAA-catabolizing enzymes in visceral adipose tissue compared to overweight or lean women (p≤0.05). CONCLUSIONS: Among metabolites altered in obesity, plasma concentrations of BCAA and the KYN/Trp ratio are closely related to increased adiposity. Alterations in expression and protein levels of BCAA-catabolizing enzymes are predominant in visceral adipose tissue.
Impact Factor
Scopus SNIP
Web of Science
Times Cited
Times Cited
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Cited By
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3.785
1.164
65
84
Anmerkungen
Besondere Publikation
Auf Hompepage verbergern
Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Branched-chain Amino Acids ; Cardiometabolic Risk Factors ; Visceral Obesity
Sprache
englisch
Veröffentlichungsjahr
2015
HGF-Berichtsjahr
2015
ISSN (print) / ISBN
0193-1849
e-ISSN
1522-1555
Quellenangaben
Band: 309,
Heft: 8,
Seiten: E736-E746
Verlag
American Physiological Society
Begutachtungsstatus
Peer reviewed
Institut(e)
Molekulare Endokrinologie und Metabolismus (MEM)
Institute of Experimental Genetics (IEG)
Institute of Experimental Genetics (IEG)
POF Topic(s)
30201 - Metabolic Health
90000 - German Center for Diabetes Research
90000 - German Center for Diabetes Research
Forschungsfeld(er)
Genetics and Epidemiology
PSP-Element(e)
G-505600-003
G-501900-061
G-501900-061
WOS ID
WOS:000364060500004
Scopus ID
84945196141
PubMed ID
26306599
Erfassungsdatum
2015-09-10