Prostacyclin-like activity in rat vascular tissues. fast, long-lasting inhibition by treatment with lysine acetylsalicylate

Silvia Villa, Giovanni de Gaetano

Research output: Contribution to journalArticlepeer-review

Abstract

Both arterial and venous tissues obtained from normal rats released prostacyclin (PGI2)-like activity, as marked by its potent inhibitory effect on platelet aggregation. Intraperitoneal or intravenous administration of a single dose of a soluble lysine salt of acetylsalicylic acid (L-ASA, 1-400 mg/kg) resulted in abolition or substantial reduction of prostacyclin-like activity released from rat vasculature. The inhibitory effect of L-ASA was evident one minute after its i.v. administration to the animals, persisted for at least 24 hours and was still detectable (in venous tissues only) 168 hours later. Venous tissues were inhibited by doses of L-ASA as low as 1 mg/kg, whereas arterial tissues were not inhibited by doses of L-ASA lower than 10 mg/kg. This difference may possibly be related to the lower prostacyclin-like activity shown by rat venous tissues compared to arterial ones. It is suggested that L-ASA or part of its molecule may bind to and inhibit cyclo-oxygenase in the blood vessel wall in a manner similar to the acetylation of platelet cyclo-oxygenase.

Original languageEnglish
Pages (from-to)1117-1124
Number of pages8
JournalProstaglandins
Volume14
Issue number6
DOIs
Publication statusPublished - 1977

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology

Fingerprint

Dive into the research topics of 'Prostacyclin-like activity in rat vascular tissues. fast, long-lasting inhibition by treatment with lysine acetylsalicylate'. Together they form a unique fingerprint.

Cite this