TY - JOUR
T1 - Pharmacologic atrial natriuretic pep tide reduces human leg capillary filtration
AU - Watenpaugh, Donald E.
AU - Vissing, Susanne F.
AU - Lane, Lynda D.
AU - Buckey, Jay C.
AU - Firth, Brain G.
AU - Erdman, William
AU - Hargens, Alan R.
AU - Blomqvist, Gunnar G.
PY - 1995/9
Y1 - 1995/9
N2 - Atrial natriuretic peptide (ANP) is produced and secreted by atrial cells. We measured calf capillary filtration rate with prolonged venous-occlusion plethysmography of supine healthy male subjects during pharmacologic infusion of ANP (48 pmol/kg/min for 15 min; n = 6) and during placebo infusion (n = 7). Results during infusions were compared to prior control measurements. ANP infusion increased plasma [ANP] from 30 ± 4 to 2,568 ± 595 pmol/L. Systemic hemoconcentration occurred during ANP infusion: Mean hematocrit and plasma colloid osmotic pressure increased 4.6 and 11.3%, respectively, relative to preinfusion baseline values (p < 0.05). Mean calf filtration, however, was significantly reduced from 0.15 to 0.08 ml/100 ml/min with ANP. Heart rate increased 20% with ANP infusion, whereas blood pressure was unchanged. Calf conductance (blood flow/arterial pressure) and venous compliance were unaffected by ANP infusion. Placebo infusion had no effect relative to prior baseline control measurements. Although ANP induced systemic capillary filtration, in the calf, filtration was reduced with ANP. Therefore, pharmacologic ANP infusion enhances capillary filtration from the systemic circulation, perhaps at upper body or splanchnic sites or both, while having the opposite effect in the leg.
AB - Atrial natriuretic peptide (ANP) is produced and secreted by atrial cells. We measured calf capillary filtration rate with prolonged venous-occlusion plethysmography of supine healthy male subjects during pharmacologic infusion of ANP (48 pmol/kg/min for 15 min; n = 6) and during placebo infusion (n = 7). Results during infusions were compared to prior control measurements. ANP infusion increased plasma [ANP] from 30 ± 4 to 2,568 ± 595 pmol/L. Systemic hemoconcentration occurred during ANP infusion: Mean hematocrit and plasma colloid osmotic pressure increased 4.6 and 11.3%, respectively, relative to preinfusion baseline values (p < 0.05). Mean calf filtration, however, was significantly reduced from 0.15 to 0.08 ml/100 ml/min with ANP. Heart rate increased 20% with ANP infusion, whereas blood pressure was unchanged. Calf conductance (blood flow/arterial pressure) and venous compliance were unaffected by ANP infusion. Placebo infusion had no effect relative to prior baseline control measurements. Although ANP induced systemic capillary filtration, in the calf, filtration was reduced with ANP. Therefore, pharmacologic ANP infusion enhances capillary filtration from the systemic circulation, perhaps at upper body or splanchnic sites or both, while having the opposite effect in the leg.
KW - Capillary permeability
KW - Capillary pressure
KW - Extracellular fluid
KW - Hemoconcentration
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U2 - 10.1097/00005344-199509000-00011
DO - 10.1097/00005344-199509000-00011
M3 - Article
C2 - 8583783
AN - SCOPUS:0029081560
SN - 0160-2446
VL - 26
SP - 414
EP - 419
JO - Journal of Cardiovascular Pharmacology
JF - Journal of Cardiovascular Pharmacology
IS - 3
ER -