Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/29740
Title: Combined aerobic and resistance exercise training attenuates cardiac dysfunctions in a model of diabetes and menopause
Authors: SANCHES, Iris CalladoBUZIN, MorganaCONTI, Filipe FernandesDIAS, Danielle da SilvaSANTOS, Camila Paixao dosSIRVENTE, RaquelSALEMI, Vera Maria CuryLLESUY, SusanaIRIGOYEN, Maria-ClaudiaANGELIS, Katia De
Citation: PLOS ONE, v.13, n.9, article ID e0202731, 15p, 2018
Abstract: The study aimed at evaluating the effects of combined aerobic and resistance exercise training on cardiac morphometry and function, oxidative stress and inflammatory parameters in diabetic ovariectomized rats. For this, female Wistar rats (10 weeks-old) were divided into 4 groups (n = 8): euglycemic (E), diabetic (streptozotocin, 50 mg/kg, iv) (D), diabetic ovariectomized (DO) and trained diabetic ovariectomized (TDO). The combined exercise training was performed on a treadmill and in a ladder adapted to rats (8 weeks, at 40 +/- 60% of maximal capacity). The left ventricle (LV) morphometry and function were evaluated by echocardiography. Oxidative stress and inflammatory markers were measured on ventricles tissue. The sedentary diabetic animals (D and DO) showed impaired systolic and diastolic functions, as well as increased cardiac overload, evaluated by myocardial performance index (MPI-D: 0.32 +/- 0.05; DO: 0.39 +/- 0.13 vs. E: 0.25 +/- 0.07), in relation to E group. Systolic and MPI dysfunctions were exacerbated in DO when compared to D group. The DO group presented higher protein oxidation and TNF-alpha/IL-10 ratio than D groups. Glutathione redox ratio (GSH/GSSG) and IL-10 were decreased in both D and DO groups when compared to E group. Exercise training improved exercise capacity, systolic and diastolic functions and MPI (0.18 +/- 0.11). The TDO group showed reduced protein oxidation and TNF-alpha/IL-10 ratio and increased GSH/GSSG and IL-10 in relation to the DO group. These results showed that combined exercise training was able to attenuate the cardiac dysfunctions, probably by reducing inflammation and oxidative stress in an experimental model of diabetes and menopause.
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Instituto do Coração - HC/InCor

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