Abstract
Prostaglandin E and F biosynthesis from eicosa-8,11,14-trienoic acid in microsomes from bovine seminal vesicles is inhibited by catalase. Prostaglandin biosynthesis in the same system is also inhibited by 3-amino-1,2,4-triazole (AT) and NaN 3, reagents which function as heme enzyme inhibitors. AT and NaN 3 inhibit arachidonic acid induced platelet aggregation. Chlorpromazine, a hydroxyl radical scavenger, inhibits platelet aggregation. 1,4-diazabicyclo[2.2.2.] octane, a singlet oxygen scavenger, does not inhibit either microsomal biosynthesis or platelet aggregation. The results are consistent with a mechanism requiring the enzymatic decomposition of H 2O 2 to a radical, possibly ·OH, in the biosynthesis of prostaglandins.
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