Summary
To investigate the effects of fluid expansion on endogenous atrial natriuretic peptide (ANP) and cyclic 3′,5′-guanosine monophosphate (cGMP), four male volunteers were studied before, during and after intravasal volume loading. Volume expansion was performed by intravenous infusion of 2,000 ml isotonic saline solution within 30 min. Mean plasma ANP levels increased 2.5-fold from 31.2 pg/ml to 81.7 pg/ml 40 min after the start of infusion. Plasma cGMP levels paralleled the rise in ANP, shwoing a mean cGMP increment from 2.7 pmol/ml to a maximum of 8.2 pmol/ml. Both ANP and cGMP levels were back to basal levels 120 min after termination of the infusion. Stimulation of endogenous ANP release by volume loading suggests that ANP is involved in the regulation of fluid homeostasis in man. The parallel rise in plasma cGMP levels supports the idea that cGMP is a mediator for the effects of ANP.
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Abbreviations
- ANP:
-
atrial natriuretic peptid
- cGMP:
-
cyclic 3′,5′-guanosine monophosphate
- PRA:
-
plasma renin activity
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Weil, J., Lang, R.E., Suttmann, H. et al. Concomitant increase in plasma atrial natriuretic peptide and cyclic GMP during volume loading. Klin Wochenschr 63, 1265–1268 (1985). https://doi.org/10.1007/BF01738451
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DOI: https://doi.org/10.1007/BF01738451