This study demonstrates the metabolic transformation of prostaglandin A1 (PGA1) by guinea pig and rat liver microsomes. The transformation, which required NADPH and oxygen, yielded polar (presumably hydroxylated) products. Incubations with guinea pig liver microsomes yielded one zone of product on tlc, whereas rat liver microsomes produced two discernable metabolic zones. It was demonstrated that PGA1 metabolism in the guinea pig and the rat was inhibited by the addition of SKF-525A, metyrapone, carbon monoxide and cytochrome C; nicotinamide (10 mM) inhibited only the guinea pig system. These findings indicate that the enzymatic activity responsible for PGA1 metabolism is composed of a typical cytochrome P-450 monooxygenase system.
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Pharmacology, Toxicology and Pharmaceutics(all)