Effects of angiotensin II and atrial natriuretic peptide alone and in combination on urinary water and electrolyte excretion in man

J. McMurray, A. D. Struthers

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)

    Abstract

    1. Atrial natriuretic peptide (ANP) has previously been shown to inhibit the renin-angiotensin-aldosterone system (RAAS) at several different levels. We have now investigated a further non-endocrine, renal interaction between ANP and the RAAS. 2. The effects of ANP and angiotensin II (ANG II) alone, and in combination, on urinary electrolyte and water excretion were studied in eight normal male subjects undergoing maximal water diuresis. 3. ANP caused a significant increase in urine flow and sodium excretion. ANG II alone was antidiuretic, antinatriuretic and antikaliuretic. When ANP was given against a background infusion of ANG II, urinary flow rate and electrolyte excretion increased from a new lower level to reach a value intermediate between that found with ANG II alone and ANP alone. 4. It is concluded that the renal effects of ANP are modified in the presence of simultaneously elevated levels of ANG II and that net water and electrolyte excretion reflect the sum of the opposing influences of each peptide. While this interplay may be non-specific, it is possible that ANP may exert some of its actions by specifically inhibiting the intrarenal effects of ANG II.
    Original languageEnglish
    Pages (from-to)419-425
    Number of pages7
    JournalClinical Science
    Volume74
    Issue number4
    DOIs
    Publication statusPublished - 1988

    Keywords

    • Aldosterone
    • Angiotensin II
    • Atrial natriuretic peptide
    • Sodium excretion

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