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Effects of a bolus dose of atrial natriuretic factor in young and elderly volunteers
Author(s) -
HEIM J.M.,
GOTTMANN K.,
WEIL J.,
STROM T. M.,
GERZER R.
Publication year - 1989
Publication title -
european journal of clinical investigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.164
H-Index - 107
eISSN - 1365-2362
pISSN - 0014-2972
DOI - 10.1111/j.1365-2362.1989.tb00229.x
Subject(s) - natriuresis , medicine , endocrinology , diuresis , bolus (digestion) , hemodynamics , receptor , blood pressure , atrial natriuretic peptide , renal function
Abstract. We assessed the haemodynamic and renal effects as well as the effects on plasma cGMP levels of a small i.v. dose (33 μg) of human atrial natriuretic factor (99–126; hANF) in two age groups of healthy volunteers. Binding properties of platelet ANF receptors were also measured. The elderly (four males, eight females, mean age 52.3 years) showed increased haemodynamic (decrease in blood pressure) and renal responses (diuresis, natriuresis, calciuresis) as well as greater increases in plasma cGMP levels and urinary cGMP excretion than the young subjects (four males, 12 females, mean age 26 years). Binding capacities and affinities of platelet ANF receptors were identical in both groups. These data indicate that the sensitivity to ANF increases with age and that this increased sensitivity is reflected in the reactivity of plasma cGMP levels but not in the properties of platelet ANF receptors. The data may be important for the therapeutic use of ANF, for the understanding of the physiological regulation of ANF action and may underline the necessity of using age‐matched control subjects for clinical studies on the possible therapeutic effectiveness of ANF.