PEDIATRICS Vol. 80 No. 4 October 1987, pp. 545-548
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Increased Plasma Cyclic Guanosine Monophosphate Concentrations in Children With High Levels of Circulating Atrial Natriuretic Peptide

Jochen Weil MD1, Rupert Gerzer MD1, Tim Strom MD1, Rudolf E. Lang MD1, Christoph Döhlemann MD1, Dieter Knorr MD1, and Frank Bidlingmaier MD1

1 From the Department of Pediatrics and Medicine, University of Munich, Munich, and the Department of Pharmacology, University of Heidelberg, Heidelberg, Federal Republic of Germany

Simultaneous measurements of plasma atrial natriuretic peptide (ANP) and cyclic guanosine monophosphate (GMP) concentrations were performed in children with various forms of cardiac diseases (n = 22) and in control children (n = 29). In healthy children, plasma ANP and cyclic GMP levels ranged between 2.4 and 98.0 (mean 45.8) pg/mL and 0.2 to 2.8 (mean 1.40) pmol/mL, respectively. In children with cardiac diseases, plasma ANP (26.0 to 499.7 [mean 188.7] pg/mL) and cyclic GMP (0.2 to 6.0 [mean 2.9] pmol/mL) levels were significantly higher than in control children (both P < .0001). There was a linear correlation between the two values in children with cardiac diseases (P < .01). Because the effects of ANP to target tissues are mediated by cyclic GMP, cyclic GMP appears to be a marker for the cellular responses to ANP. The increased cyclic GMP levels in children with cardiac diseases indicate that ANP exerts its effects on target organs also in states of chronically enhanced ANP levels.

Key Words: atrial natriuretic peptide • cyclic 3',5'-guanosine monophosphate • cardiac disease

Submitted on July 9, 1986
Accepted on November 10, 1986