Inhibition of platelet aggregation and arachidonate metabolism in platelets by procyanidins

Wen Chang Chang, Feng-Lin Hsu

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


The effects of procyanidins on platelet aggregation and arachidonate metabolism in platelets were studied. Nine procyanidins were used in this investigation. Procyanidins B-2-S, EEC and C-1 significantly induced the inhibition of platelet aggregation, and the potency of inhibition was comparable with aspirin. Procyanidin B-2-S was used as a representative of procyanidins for further studies on the effect on arachidonate metabolism. In arachidonate metabolism by fatty acid cyclooxygenase pathway, B-2-S inhibited TXB2 and HHT formation by intact platelets treated with exogenous arachidonic acid. It also inhibited TXB2 formation measured by a specific radioimmunoassay when the cells were challenged with calcium ionophore A23187. In cell-free system, B-2-S inhibited both TXB2 and 12-HETE bioxynthesis in platelet microsome and cytosol, respectively. The inhibitory effect on thromboxane biosynthesis might explain the inhibitory effect of procyanidins on platelet aggregation.

Original languageEnglish
Pages (from-to)181-188
Number of pages8
JournalProstaglandins Leukotrienes and Essential Fatty Acids
Issue number3
Publication statusPublished - Dec 1989

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Cell Biology


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