Relation of Changes in Body Fat Distribution to Oxidative Stress - 22/11/17
Abstract |
Android fat is a surrogate measure of visceral obesity in the truncal region. Both visceral adiposity and oxidative stress (OS) are linked to cardiometabolic risk factors and clinical cardiovascular disease. However, whether body fat distribution (android vs gynoid) is associated with OS remains unknown. We hypothesized that increased android fat will be associated with greater OS. Body fat distribution and markers of OS, including plasma levels of reduced (cysteine and glutathione) and oxidized (cystine and glutathione disulfide) aminothiols, were estimated in 711 volunteers (67% female, 23% black, mean age 48 ± 11) enrolled in the Emory Georgia Tech Predictive Health study. At 1 year, 498 subjects had repeat testing. At baseline, anthropometric and fat distribution indexes, including body mass index, waist circumference, weight/hip ratio, and android and gynoid fat mass correlated with lower plasma concentrations of glutathione and higher cystine levels indicative of higher OS. At 1 year, the change in android but not gynoid fat mass or body mass index negatively correlated with the change in the plasma glutathione level after adjustment for cardiovascular risk factors. Increased body fat, specifically android fat mass, is an independent determinant of systemic OS, and its change is associated with a simultaneous change in OS, measured as plasma glutathione. In conclusion, our findings suggest that excess android or visceral fat contributes to the development of cardiovascular disease through modulating OS.
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This work was supported by the Marcus and Woodruff Foundations, Atlanta, Georgia, and the Emory University/Georgia Tech Predictive Health Institute, and awards UL1 RR025008 and UL1 TR000454 from the Clinical and Translational Science Award Program, the National Institutes of Health (NIH), the National Center for Research Resources, and the National Center for Advancing Translational Sciences. Dr. Quyyumi is supported by NIH grants 5P01HL101398-02, 1P20HL113451-01, 1R56HL126558-01, 1RF1AG051633-01, R01 NS064162-01, R01 HL89650-01, HL095479-01, 1U10HL110302-01, 1DP3DK094346-01, and 2P01HL086773, and American Heart Association grant no. 0000031288. HMK has been supported by the Abraham J. and Phyllis Katz Foundation and NHLBI T32 THL130025A. |
Vol 120 - N° 12
P. 2289-2293 - décembre 2017 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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