Comparison of the in vitro effect of eicosapentaenoic acid (EPA)-derived lipoxygenase metabolites on human platelet function with those of arachidonic acid.

Abstract:

:Eicosapentaenoic acid (EPA) has been reported to have a potent anti-aggregatory activity and to be efficiently metabolized by 12-lipoxygenase, not by cyclooxygenase in platelets. In vitro effect of 12-lipoxygenase metabolites of EPA on platelet function was studied and compared with those of arachidonic acid (AA). The 12-lipoxygenase metabolites of AA and EPA; 12-hydroperoxyeicosatetraenoic acid (12-HPETE) and 12-hydroperoxyeicosapentaenoic acid (12-HPEPE), and their hydroxy derivatives, 12-hydroxyeicosatetraenoic acid (12-HETE) and 12-hydroxyeicosapentaenoic acid (12-HEPE) were prepared enzymatically using human platelet lysate. These compounds were purified by high performance liquid chromatography and identified by gas chromatography mass spectrometry. 12-HPETE and 12-HPEPE inhibited dose-dependently washed human platelet aggregation and serotonin (5-HT) release induced by AA and collagen. The potency of 12-HPEPE was almost equal to that of 12-HPETE. Their hydroxy derivatives, 12-HETE and 12-HEPE were less potent. 12-hydroperoxy derivatives of AA and EPA were the most potent in inhibiting platelet aggregation and 5-HT release among 5-, 12- and 15-hydroperoxy isomers of AA and EPA. The inhibitory effects of 12-HPETE and 12-HPEPE on platelet aggregation were additive.

journal_name

Thromb Res

journal_title

Thrombosis research

authors

Takenaga M,Hirai A,Terano T,Tamura Y,Kitagawa H,Yoshida S

doi

10.1016/0049-3848(86)90248-3

subject

Has Abstract

pub_date

1986-02-01 00:00:00

pages

373-84

issue

3

eissn

0049-3848

issn

1879-2472

pii

0049-3848(86)90248-3

journal_volume

41

pub_type

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