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Title: Resistance training downregulates macrophages infiltration in the kidney of 5/6 nephrectomized rats
Authors: MORAES, Milton RochaROSA, Thiago SantosSOUZA, Michel KendyNEVES, Rodrigo Vanerson PassosBACURAU, Reury Frank PereiraPASSOS, Clevia SantosCENEDEZE, Marcos AntonioPASSOS, Michelle TiveronMACHADO, Flavia GomesPACHECO-SILVA FILHO, AlvaroCAMARA, Niels Olsen Saraiva
Citation: LIFE SCIENCES, v.213, p.190-197, 2018
Abstract: Introduction: Chronic kidney disease (CKD) is considered a significant world health problem with elevated mortality rates. Patients with CKD are restricted to mild physical activity, present chronic inflammatory state and loss of muscle strength. Currently, the influence of resistance exercise (RE) on the progression of renal disease has not being fully elucidated. Purpose: To evaluate the effects of RE on the progression of CKD in a remnant kidney model (5/6Nx) in rats. Methods: Eight-week-old Wistar rats were submitted to 5/6 nephrectomy and were divided into four groups: Sham sedentary (Sham SD); Sham RE (Sham RE); 5/6Nx SD and 5/6Nx RE. The animals were trained for 8 weeks in a vertical climbing ladder for 3 days per week, on non-consecutive days. Results: As expected, 5/6Nx SD group presented a markedly loss of renal function, increased plasma inflammatory cytokines and increased oxidative stress with a reduced activity of nitric oxide. The higher macrophage infiltration and fibrosis confirmed these conditions. RE attenuated systolic blood pressure and renal function decrease and also improved serum lipid parameters in 5/6 Nx animals. It was evident the increase of muscle strength and mass in the trained groups while the sedentary group showed reduced muscle weight and strength compared to Sham SD. Conclusions: RE implemented following 5/6Nx retard the progression of chronic kidney injury while simultaneously allowed the maintenance of skeletal muscle strength.
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