Inhibition of renin secretion from rat renal cortical slices by (R)-12- HETE

W. L. Henrich, J. R. Falck, W. B. Campbell

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The arachidonic acid metabolite 12-hydroxyeicosatetraenoic acid (12-HETE) inhibits renin secretion both in vivo and in vitro, but the enzymatic origin of the 12-HETE responsible for renin inhibition is unknown. These studies examined the effect of the 12-HETE stereoisomers (R)-12-HETE (a product of the cytochrome P-450 monooxygenase enzyme system) and (S)-12-HETE (a product of the lipoxygenase enzyme system) on basal and stimulated renin secretion from superficial cortical slices in the rat. First, rat cortex was shown to produce 12-HETE; chiral-phase high-performance liquid chromatography revealed that cortex produced 81% (S)-12-HETE and 19% (R)-12-HETE. (R)-12-HETE reduced basal renin release by 28 ± 4% to 49 ± 5% at concentrations of 10-9 to 10-7 M (P < 0.05 to 0.01). (S)-12-HETE did not significantly affect renin release. (R)-12-HETE also blunted isoproterenol-stimulated renin secretion (P < 0.05) at a concentration of 10-6 M. 20-HETE, another cytochrome P-450 product, did not exert a significant effect on renin release. In summary, both (R)-12-HETE and (S)-12-HETE are synthesized by renal cortical tissue. Only (R)-12-HETE directly inhibits in vitro renin release. These findings suggest that the renal cytochrome P-450 enzyme system is capable of directly influencing local renin secretion.

Original languageEnglish (US)
Pages (from-to)F665-F670
JournalAmerican Journal of Physiology - Renal Fluid and Electrolyte Physiology
Volume263
Issue number4 32-4
DOIs
StatePublished - 1992

Keywords

  • cytochrome P-450 system
  • hydroxyeicosatetraenoic acid
  • renal cortex

ASJC Scopus subject areas

  • Physiology

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