INTERACTION BETWEEN EPIDERMAL GROWTH FACTOR AND ARGININE VASOPRESSIN IN RENAL MEDULLARY MEMBRANES

S. L. Grant, P. A. Phillips, C. B. Gow

Research output: Contribution to journalConference article

Abstract

1. Epidermal growth factor is a potent mitogen that causes natriuresis, diuresis and inhibition of arginine vasopressin‐induced water reabsorption. 2. The aim of this study was to determine any interaction between epidermal growth factor and the V1 (vascular) and/or V2 (antidiuretic) arginine vasopressin receptor subtypes. 3. Radioligand binding displacement assays demonstrated that although arginine vasopressin related peptides displaced both radioligands from renal medullary membranes at low concentrations epidermal growth factor displaced neither. 4. Arginine vasopressin V2 receptor second messenger cyclic adenosine monophosphate (CAMP) production was inhibited by epidermal growth factor (IC50 2 ± 10−7 mol/L) as was sodium fluoride cAMP production but only at much higher concentrations. 5. Therefore the diuretic effect of epidermal growth factor is not via direct antagonism of arginine vasopressin receptors but seems mediated via inhibition of the V2 second messenger system.

Original languageEnglish
Pages (from-to)243-247
Number of pages5
JournalClinical and Experimental Pharmacology and Physiology
Volume21
Issue number3
DOIs
Publication statusPublished - Mar 1994
Externally publishedYes

Keywords

  • arginine vasopressin
  • arginine vasopressin receptor
  • cyclic adenosine monophosphate
  • epidermal growth factor.

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