title: Effect of dipyrone, acetylsalicylic acid and acetaminophen on human neutrophil chemotaxis.
abstract: Dipyrone metabolites 4-methylaminoantipyrine (MAA) and 4-formylaminoantipyrine (FAA) as well as acetylsalicylic acid inhibited neutrophil migration toward zymosan-activated serum. Inhibition was maximal (76.8 +/- 19.0; 79.2 +/- 12.5 and 80.0 +/- 4.4%, respectively, P less than 0.003) when suboptimal concentrations (0.3%) of the chemoattractant were used and could be demonstrated with drug concentrations comparable with plasma concentrations obtained in clinical use. Acetaminophen and other dipyrone metabolites 4-aminoantipyrine (AA) and 4-acetylaminoantipyrine (AAA) lacked chemotactic inhibitory potential. Only MAA and FAA inhibited mildly neutrophil random migration (18.1 +/- 7.8 and 11.2 +/- 3.4%, respectively). We suggest that blocking neutrophil movement plays a role in the anti-inflammatory activity of dipyrone and acetylsalicylic acid, but their mechanism of inhibition remains obscure.
mesh_terms: D000082:Acetaminophen / Q000494:pharmacology*; D000632:Aminopyrine / Q000031:analogs & derivatives* / Q000494:pharmacology; D000675:Ampyrone / Q000031:analogs & derivatives / Q000494:pharmacology; D001241:Aspirin / Q000494:pharmacology*; D002634:Chemotaxis, Leukocyte / Q000187:drug effects*; D004177:Dipyrone / Q000031:analogs & derivatives / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D009504:Neutrophils / Q000187:drug effects*; D047069:Pyrazolones
chemical_list: D047069:Pyrazolones; D000632:Aminopyrine; D000675:Ampyrone; C011256:4-formylaminoantipyrine; D000082:Acetaminophen; D004177:Dipyrone; C010403:N-acetylaminoantipyrine; C008667:noramidopyrine; D001241:Aspirin