Vasoactivity of 20-hydroxyeicosatetraenoic acid is dependent on metabolism by cyclooxygenase

B. Escalante, W. C. Sessa, J R Falck, P. Yadagiri, M. L. Schwartzman

Research output: Contribution to journalArticlepeer-review

126 Scopus citations


We recently demonstrated that cortical microsomes from spontaneously hypertensive rats metabolize arachidonic acid via cytochrome P450 to ω- and ω-1 hydroxylated compounds, 19- and 20-hydroxyeicosatetraenoic acids (HETE). The vascular activities of 20-HETE and the two isomers of 19-HETE were examined in rat aortic rings. The HETEs produced concentration-dependent contractions of the aortic rings. The contraction elicited by 20-HETE was abolished partially by removal of endothelium and was inhibited completely by treatment with indomethacin and reversed to a relaxation response by treatment with the endoperoxide and thromboxane receptor antagonist SQ 29548. These data suggest that the vascular effects of 20-HETE depend on subsequent metabolism by cyclooxygenase.

Original languageEnglish (US)
Pages (from-to)229-232
Number of pages4
JournalJournal of Pharmacology and Experimental Therapeutics
Issue number1
StatePublished - 1989

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology


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