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Related Experiment Videos

Postexercise proteinuria in humans and its adrenergic component.

J R Poortmans1, C Haggenmacher, J Vanderstraeten

  • 1Chimie Physiologique, Institut Supérieur d Education Physique et de Kinésithérapie, Université Libre de Bruxelles, Bruxelles, Belgium. jrpoortm@ulb.ac.be

The Journal of Sports Medicine and Physical Fitness
|April 24, 2001
PubMed
Summary

This study found that administering clonidine, an alpha2-adrenergic agonist, reduced postexercise proteinuria and albuminuria in healthy males. This suggests catecholamines play a role in exercise-induced kidney changes.

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Area of Science:

  • Exercise Physiology
  • Renal Physiology
  • Pharmacology

Background:

  • Postexercise proteinuria is common, potentially linked to hemodynamic and sympathetic nervous system responses.
  • The role of catecholamines in exercise-induced kidney changes requires further investigation.

Purpose of the Study:

  • To investigate the role of catecholamines in postexercise proteinuria.
  • To determine if an alpha2-adrenergic agonist (clonidine) can attenuate exercise-induced kidney effects.

Main Methods:

  • Nine healthy males received clonidine (300 mg) or placebo two hours before maximal exercise testing.
  • Blood and urine samples were collected at rest and post-exercise for lactate, creatinine, and albumin analysis.
  • Renal clearance of albumin was calculated to assess kidney function.

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Main Results:

  • Clonidine administration significantly reduced postexercise proteinuria and albuminuria compared to placebo.
  • Postexercise albumin renal clearance decreased by 40% with clonidine treatment.
  • Plasma lactate levels post-exercise were similar between clonidine and placebo groups.

Conclusions:

  • Catecholamines appear to contribute to increased glomerular membrane permeability during strenuous exercise.
  • Alpha2-adrenergic agonism may mitigate exercise-induced proteinuria and albuminuria.