Nitric oxide involvement in post-exercise proteinuria of sedentary young men

Abstract

Objectives. - Post-exercise proteinuria is generally characterised based on the alterations in renal hemodynamics. The present study was focused on the role of nitric oxide in post-exercise proteinuria; nitric oxide is a biomolecule involved in mechanisms that affect renal hemodynamics and is a mediator that rises during exercise bouts. Methods. - Healthy human subjects performed three high-intensity exercise sessions with a one-week interval; control, NO donor (isosorbide mononitrate) and vasodilator that unrelated nitric oxide (diltiazem). Urine samples obtained immediately before and 30 and 120 minutes after the exercise session were examined for proteinuria. The alterations in systemic blood pressure induced by the drugs were evaluated by performing blood pressure measurements. Results. - Both the agents that were administered caused a significant decrease in the systolic or diastolic blood pressure; however, the extent of reduction was not different between the two agents. Exercise session induced apparent proteinuria at 30 minutes post-exercise during all the protocols. Exercise-induced rise in urinary protein excretion was significantly reduced by isosorbide mononitrate, while a similar effect was not observed for diltiazem. Conclusion. -Our results revealed that exogenous nitric oxide could alter the hemodynamic changes during exercise and thus reduce post-exercise proteinuria. Further, endogenous nitric oxide may prevent excessive elevation in the post-exercise proteinuria during normal physiological conditions. (C) 2019 Elsevier Masson SAS. All rights reserved.