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Long-term exercise restores hydrogen sulfide in the kidney and contributes to exercise benefits in 5/6 nephrectomized rats.
Clinical and Experimental Hypertension : CHE 2018 March 10
Physical exercise is shown to have protective effects on chronic kidney disease (CKD). CKD itself is associated with a reduction in renal hydrogen sulfide (H2S) concentration. This study was designed to investigate whether protective effects of exercise in 5/6 nephrectomized (5/6 NX) rats is associated with H2S levels in the kidney? Twenty four male Wistar rats weighing 250-300 g were assigned into 4 groups: 1- Sham 2- Sham exercise 3-5/6 NX 4-5/6 NX+exercise. To induce CKD, 4 days after removing upper and lower one-third parts of the left kidney, total right nephrectomy was performed. In the Sham groups, anesthesia and surgery were performed like the other groups without removal of the kidney mass. Exercise was performed by treadmill at a speed of 18 m/min for 8 weeks. At the end of the twelfth week, blood and kidney samples were collected to measure renal function (levels of plasma urea and creatinine), oxidative stress markers (renal MDA level and SOD activity), and histological indices. Eight weeks exercise significantly improved serum creatinine, BUN, renal MDA level, SOD activity, renal sympathetic nerve activity (RSNA), hypertension, and renal histology in addition to renal H2S level compared to the 5/6 NX group. The results suggest that regular exercise improves renal oxidative status and ameliorates renal damage, hypertension, and RSNA in 5/6 nephrectomized rats. These improvements by exercise might be associated with the increase in renal H2S level.
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