TY - JOUR
T1 - Renal Extraction and Acute Effects of Glucagon-like peptide-1 on Central and Renal Hemodynamics in Healthy Men
AU - Asmar, Ali
AU - Simonsen, Lene
AU - Asmar, Meena
AU - Madsbad, Sten
AU - Holst, Jens Juul
AU - Frandsen, Erik
AU - Moro, Cedric
AU - Jonassen, Thomas
AU - Bülow, Jens
N1 - Copyright © 2015, American Journal of Physiology - Endocrinology and Metabolism.
PY - 2015/4/15
Y1 - 2015/4/15
N2 - The present experiments were performed to elucidate the acute effects of intravenous infusion of glucagon-like peptide (GLP)-1 on central and renal hemodynamics in healthy men. Seven healthy middle-aged men were examined on two different occasions in random order. During a 3-h infusion of either GLP-1 (1.5 pmol·kg−1·min−1) or saline, cardiac output was estimated noninvasively, and intraarterial blood pressure and heart rate were measured continuously. Renal plasma flow, glomerular filtration rate, and uptake/release of hormones and ions were measured by Fick's Principle after catheterization of a renal vein. Subjects remained supine during the experiments. During GLP-1 infusion, both systolic blood pressure and arterial pulse pressure increased by 5 ± 1 mmHg (P = 0.015 and P = 0.002, respectively). Heart rate increased by 5 ± 1 beats/min (P = 0.005), and cardiac output increased by 18% (P = 0.016). Renal plasma flow and glomerular filtration rate as well as the clearance of Na+ and Li+ were not affected by GLP-1. However, plasma renin activity decreased (P = 0.037), whereas plasma levels of atrial natriuretic peptide were unaffected. Renal extraction of intact GLP-1 was 43% (P < 0.001), whereas 60% of the primary metabolite GLP-1 9-36amide was extracted (P = 0.017). In humans, an acute intravenous administration of GLP-1 leads to increased cardiac output due to a simultaneous increase in stroke volume and heart rate, whereas no effect on renal hemodynamics could be demonstrated despite significant extraction of both the intact hormone and its primary metabolite.
AB - The present experiments were performed to elucidate the acute effects of intravenous infusion of glucagon-like peptide (GLP)-1 on central and renal hemodynamics in healthy men. Seven healthy middle-aged men were examined on two different occasions in random order. During a 3-h infusion of either GLP-1 (1.5 pmol·kg−1·min−1) or saline, cardiac output was estimated noninvasively, and intraarterial blood pressure and heart rate were measured continuously. Renal plasma flow, glomerular filtration rate, and uptake/release of hormones and ions were measured by Fick's Principle after catheterization of a renal vein. Subjects remained supine during the experiments. During GLP-1 infusion, both systolic blood pressure and arterial pulse pressure increased by 5 ± 1 mmHg (P = 0.015 and P = 0.002, respectively). Heart rate increased by 5 ± 1 beats/min (P = 0.005), and cardiac output increased by 18% (P = 0.016). Renal plasma flow and glomerular filtration rate as well as the clearance of Na+ and Li+ were not affected by GLP-1. However, plasma renin activity decreased (P = 0.037), whereas plasma levels of atrial natriuretic peptide were unaffected. Renal extraction of intact GLP-1 was 43% (P < 0.001), whereas 60% of the primary metabolite GLP-1 9-36amide was extracted (P = 0.017). In humans, an acute intravenous administration of GLP-1 leads to increased cardiac output due to a simultaneous increase in stroke volume and heart rate, whereas no effect on renal hemodynamics could be demonstrated despite significant extraction of both the intact hormone and its primary metabolite.
U2 - 10.1152/ajpendo.00429.2014
DO - 10.1152/ajpendo.00429.2014
M3 - Journal article
C2 - 25670826
SN - 0193-1849
VL - 308
SP - E641-E649
JO - American Journal of Physiology: Endocrinology and Metabolism
JF - American Journal of Physiology: Endocrinology and Metabolism
IS - 8
ER -