Locally different role of atrial natriuretic peptide (ANP) in the pericardial fluid

Pál Soós, Alexander Juhász-Nagy, Heikki Ruskoaho, István Hartyánszky, Béla Merkely, Miklós Tóth, Ferenc Horkay

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Pericardial fluid (PF) contains several vasoactive agents in higher concentrations than venous plasma (VP). However, with human atrial natriuretic peptide (ANP) controversial data have been reported in earlier studies performed on a limited number of patients (less than 20). The present study was designed to characterize the ANP levels in human PF and cardiac tissues, and to ascertain whether myocardial ischemic state is a major factor in determining ANP production of the human heart. In a total of 316 consecutive patients undergoing open heart surgery ANP levels in VP, PF, atrial and ventricular tissues were measured by radioimmunoassay and analyzed by high-performance liquid chromatography (HPLC). The data are presented as median and 25th-75th percentiles. Our results showed ANP concentration [ANP] of PF significantly exceeded that of VP and [ANP] in the atrial tissue was significantly higher than in the ventricular tissue (p < 0.001). In patients without myocardial ischemia (valvular heart disease) [ANP] in the PF was 258.3 (189.9-342.5) pg/ml, in the VP 28.4 (11.7-57.6) pg/ml and 151.7 (78.4-447.6) ng/mg in the atrial, 0.4 (0.2-1.6) ng/mg in the ventricular tissue. The corresponding values for patients with coronary artery disease were 208.1 (153.8-318.9) pg/ml in the PF, 19.8 (9.4-27.9) pg/ml in the VP, 129.6 (66.5-455.0) ng/mg in the atrial and 1.0 (0.1-1.8) ng/mg in the ventricular tissue. The ventricular tissue levels correlated to the atrial tissue levels (r = 0.317; p < 0.05). Great difference (p < 0.001) was found in the atrial tissue levels between females [414.6 (119.7-734.4) ng/mg] and males [105.4 (65.3-204.2) ng/mg]. In HPLC analysis the majority of the pericardial fluid and tissue ir-ANP coeluted with human ANP [99-126]. In conclusion, [ANP] in PF of cardiosurgical patients is higher by an order of magnitude than in VP. Intrapericardial ANP may reflect the peptide concentration in the myocardial interstitium and may represent a paracrine regulatory mechanism, which seems independent of ANP-induced putative antiischemic influences.

Original languageEnglish
Pages (from-to)2563-2573
Number of pages11
JournalLife Sciences
Volume71
Issue number21
DOIs
Publication statusPublished - Oct 11 2002

Keywords

  • Atrial natriuretic peptide
  • Myocardial interstitium
  • Myocardial ischemia
  • Paracrine regulation
  • Pericardial fluid

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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