title: Inhibition of diamine oxidase activity by metronidazole.
abstract: Metronidazole was found to be a non-competitive inhibitor of man, rabbit and rat intestinal diamine oxidases with an inhibition constant value of approximately 10(-4) M. The purified bovine serum amine oxidase was not inhibited, whereas the purified swine kidney enzyme gave similar results. These findings suggest that metronidazole and similar compounds, used as antibacterial and antiprotozoal drugs, should be given under careful control, especially when administered for long times, because a decrease of intestinal diamine oxidase activity was proven to be a risk factor for several pathologies of this organ.
authors.affiliation: Department of Biochemical Sciences A. Rossi Fanelli, University of Rome La Sapienza, Italy.
authors.forename: O
authors.initials: O
authors.lastname: Befani
authors.forename: T S
authors.initials: TS
authors.lastname: Shiozaki
authors.forename: P
authors.initials: P
authors.lastname: Turini
authors.forename: P
authors.initials: P
authors.lastname: Gerosa
authors.forename: B
authors.initials: B
authors.lastname: Mondovi
mesh_terms: D006631:Amine Oxidase (Copper-Containing) / Q000037:antagonists & inhibitors*; D000818:Animals; D002417:Cattle; D003956:Dialysis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007422:Intestines / Q000201:enzymology*; D007668:Kidney / Q000201:enzymology; D007700:Kinetics; D008795:Metronidazole / Q000494:pharmacology*; D000587:Oxidoreductases Acting on CH-NH Group Donors / Q000097:blood; D011817:Rabbits; D051381:Rats; D013552:Swine
chemical_list: D008795:Metronidazole; D006631:Amine Oxidase (Copper-Containing); D000587:Oxidoreductases Acting on CH-NH Group Donors