Renal neurohormonal and vascular responses to dynamic exercise in humans
Détails
ID Serval
serval:BIB_A3F10EE0F067
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Renal neurohormonal and vascular responses to dynamic exercise in humans
Périodique
Journal of Applied Physiology
ISSN
8750-7587 (Print)
Statut éditorial
Publié
Date de publication
05/1991
Volume
70
Numéro
5
Pages
2279-86
Notes
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: May
Research Support, Non-U.S. Gov't --- Old month value: May
Résumé
Effects of graded supine dynamic exercise (30, 60, and 80-90% of maximal physical capacity, i.e., work loads of 69, 132, and 188 W) on renal vascular resistance (RVR); renal sympathetic nerve activity [assessed by the renal venous overflow of norepinephrine (NE)]; renal overflows of dopamine (DA), immunoreactive neuropeptide Y (NPY-LI), and renin; as well as plasma concentrations of angiotensin-(1-8)-octapeptide (ANG II) were evaluated in eight healthy male volunteers. Exercise evoked stimulus-dependent and marked elevations of RVR, arterial NE, epinephrine (Epi), and DA. RVR increased by 140% and the renal overflows of NE and DA increased by 1,331 and 179%, respectively, at 188 W. A net removal of NPY-LI at rest turned into a small net renal overflow, which correlated with increases in RVR at 188 W. Increases in renin release (+1,200% at 188 W) correlated with increases in renal NE and DA overflows and with arterial Epi levels. Arterial ANG II levels increased stimulus dependently (by 264% at 188 W) and correlated more closely with increases in RVR than did other variables. Thus dynamic exercise is a potent stimulus for renal nerve activation in humans, and renal sympathetic nerve activity may contribute to increased RVR both directly (NE and, at exhaustive work loads, possibly NPY) and indirectly (via renin-mediated ANG II formation).
Mots-clé
Adult
Dopamine/secretion
Exercise/*physiology
Humans
Kidney/innervation/*physiology
Male
Neuropeptide Y/secretion
Neurotransmitter Agents/*secretion
Norepinephrine/secretion
Renal Circulation/physiology
Renin-Angiotensin System/physiology
Sympathetic Nervous System/physiology
Vascular Resistance/physiology
Pubmed
Web of science
Création de la notice
05/03/2008 17:41
Dernière modification de la notice
20/08/2019 16:09