The effect of hydralazine on arachidonic acid metabolism in isolated, washed human platelets

J. R. Luderer, Laurence Demers, R. W. Janson, C. T. Nomides, A. H. Hayes

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The effects of hydralazine on arachidonic acid metabolism were studied in isolated washed human platelets. The washed platelets (10 9/ml) were exposed to 14C-arachidonic acid and incubated for 15 minutes in a platelet aggregometer (37°C). The media was then extracted and the reaction products separated by means of reversed phase high pressure liquid chromatography. In this system, hydralazine inhibited the production of TXB 2 (the stable metabolite of TXA 2) and enhanced the production of PGF 2(α) and PGE 2 in a dose dependent fashion. Indomethacin, blocked the production of all prostaglandin compounds normally synthesized by platelets. These results suggest that hydralazine is a specific thromboxane synthetase inhibitor and that its vasodilatory effects might be related to its ability to block the production of an endogenous vasoconstrictor (i.e. TXA 2).

Original languageEnglish (US)
Pages (from-to)43-52
Number of pages10
JournalResearch Communications in Chemical Pathology and Pharmacology
Volume28
Issue number1
StatePublished - Jun 20 1980

Fingerprint

Hydralazine
Platelets
Arachidonic Acid
Metabolism
Blood Platelets
Thromboxane-A Synthase
High pressure liquid chromatography
Prostaglandins F
Vasoconstrictor Agents
Reverse-Phase Chromatography
Metabolites
Prostaglandins E
Reaction products
Indomethacin
Prostaglandins
High Pressure Liquid Chromatography

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine
  • Toxicology
  • Pharmacology
  • Pharmacology, Toxicology and Pharmaceutics(all)

Cite this

Luderer, J. R. ; Demers, Laurence ; Janson, R. W. ; Nomides, C. T. ; Hayes, A. H. / The effect of hydralazine on arachidonic acid metabolism in isolated, washed human platelets. In: Research Communications in Chemical Pathology and Pharmacology. 1980 ; Vol. 28, No. 1. pp. 43-52.
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The effect of hydralazine on arachidonic acid metabolism in isolated, washed human platelets. / Luderer, J. R.; Demers, Laurence; Janson, R. W.; Nomides, C. T.; Hayes, A. H.

In: Research Communications in Chemical Pathology and Pharmacology, Vol. 28, No. 1, 20.06.1980, p. 43-52.

Research output: Contribution to journalArticle

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AU - Demers, Laurence

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AB - The effects of hydralazine on arachidonic acid metabolism were studied in isolated washed human platelets. The washed platelets (10 9/ml) were exposed to 14C-arachidonic acid and incubated for 15 minutes in a platelet aggregometer (37°C). The media was then extracted and the reaction products separated by means of reversed phase high pressure liquid chromatography. In this system, hydralazine inhibited the production of TXB 2 (the stable metabolite of TXA 2) and enhanced the production of PGF 2(α) and PGE 2 in a dose dependent fashion. Indomethacin, blocked the production of all prostaglandin compounds normally synthesized by platelets. These results suggest that hydralazine is a specific thromboxane synthetase inhibitor and that its vasodilatory effects might be related to its ability to block the production of an endogenous vasoconstrictor (i.e. TXA 2).

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