title: Effects of aspirin, indomethacin, flufenamic acid and paracetamol on prostaglandin output from rat stomach and renal papilla in-vitro and ex-vivo.
abstract: The effects of aspirin, indomethacin, flufenamic acid and paracetamol on prostaglandin (PG) biosynthesis were studied in whole cell preparations of rat renal papilla and stomach in-vitro and ex-vivo. In the ex-vivo experiments a low dose aspirin was a potent inhibitor of PGE output from the stomach but not the renal papilla, while in-vitro renal PGE output was inhibited by aspirin to a greater extent than gastric PGE. Indomethacin and flufenamic acid inhibited both renal papillary and gastric PGE outputs in-vitro and ex-vivo. Paracetamol enhanced PGE output from the stomach more than twice ex-vivo, and to a lesser extent in-vitro. It also augmented PGE output from the papilla ex-vivo but not in-vitro. In view of the possible contribution of cellular organization and pharmacokinetic processes to the ultimate effect, it is suggested that studies on the effects of anti-inflammatory and antipyretic agents on PG biosynthesis should not be restricted to fully in-vitro systems.
mesh_terms: D000082:Acetaminophen / Q000494:pharmacology; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D001241:Aspirin / Q000494:pharmacology; D005260:Female; D005439:Flufenamic Acid / Q000494:pharmacology; D005753:Gastric Mucosa / Q000187:drug effects* / Q000378:metabolism; D066298:In Vitro Techniques; D007213:Indomethacin / Q000494:pharmacology; D007679:Kidney Medulla / Q000187:drug effects* / Q000378:metabolism; D011458:Prostaglandins E / Q000096:biosynthesis*; D051381:Rats
chemical_list: D000893:Anti-Inflammatory Agents; D011458:Prostaglandins E; D000082:Acetaminophen; D005439:Flufenamic Acid; D001241:Aspirin; D007213:Indomethacin