Biosynthesis of PGs AA 环氧合酶 COX-1 COX (Cyclo-oxygenase) PGG2 过氧合酶 PGH2 PG derivatives 缓激肽↑ 5HTs↑Biosynthesis of PGs AA PGG2 PGH2 PG derivatives 环氧合酶 过氧合酶 COX-1 COX-2 缓激肽↑ 5-HTs↑ COX (Cyclo-oxygenase)