Plasma clearance and tissue binding of rANP[99-126] and iso-rANP[1-45] in the rat

S. C. Pang, I. R. Sarda, D. A. Wigle, Z. J. Zhou, D. B. Jennings, T. G. Flynn

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Plasma clearance and tissue binding of atrial natriuretic peptide (ANP) and iso-ANP were compared in Inactin-anaesthetized rats. It was found that the plasma half-life of iso-ANP was comparable to ANP. Appearance of trichloroacetic acid-soluble radioactivity of iso-ANP in the plasma was considerably slower than that of ANP, suggesting that the metabolic process of these two peptides may be different. Although the binding distribution of these two peptides was similar, the total binding of iso-ANP to organs other than the kidney was much lower. The kidney, lung, heart and adrenal gland appeared to be major target organs for iso-ANP. Autoradiography showed that iso-ANP bound specifically to the renal glomerulus and proximal part of the proximal tubule. This latter binding site in the kidney was not apparent with ANP, suggesting that iso-ANP may exerts its physiological action at different sites in this organ.

Original languageEnglish (US)
Pages (from-to)1-9
Number of pages9
JournalRegulatory Peptides
Volume33
Issue number1
DOIs
StatePublished - Mar 26 1991

Keywords

  • ANP
  • Atrial natriuretic peptide
  • Autoradiography
  • Plasma clearance
  • Tissue binding
  • iso-ANP

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Endocrinology
  • Clinical Biochemistry
  • Cellular and Molecular Neuroscience

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