title: Metronidazole inhibits leukocyte-endothelial cell adhesion in rat mesenteric venules.
abstract: OBJECTIVE
  The beneficial effects of metronidazole in intestinal inflammation are generally attributed to the drug's antimicrobial actions. The objective of this study was to determine whether metronidazole exerts an anti-inflammatory action by inhibiting leukocyte-endothelial cell adhesion in postcapillary venules.
  
  
  METHODS
  Short-term (leukotriene B4 superfusion) and long-term (subcutaneous indomethacin injections) inflammatory responses were elicited in rat mesentery). The number of adherent and emigrated leukocytes, leukocyte rolling velocity, erythrocyte velocity, blood flow, and shear rate were monitored in normal and inflamed postcapillary venules.
  
  
  RESULTS
  Eightfold and 2.7-fold increases in leukocyte adherence and comparable increments in leukocyte emigration were observed 48 hours and 14 days after indomethacin treatment, respectively. Metronidazole, but not its vehicle (methylcellulose), reversed the leukocyte adherence and emigration responses elicited by indomethacin. The antibiotic was equally effective in preventing the reduction in leukocyte rolling velocity and increased leukocyte adherence/emigration elicited by acutely exposing venules to leukotriene B4.
  
  
  CONCLUSIONS
  These results indicate that some of the beneficial effects of metronidazole in intestinal inflammation may be related to its influence on leukocyte-endothelial cell adhesion.
authors.affiliation: Department of Internal Medicine I, University of Regensberg, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Arndt
authors.forename: K D
authors.initials: KD
authors.lastname: Palitzsch
authors.forename: M B
authors.initials: MB
authors.lastname: Grisham
authors.forename: D N
authors.initials: DN
authors.lastname: Granger
mesh_terms: D000818:Animals; D002448:Cell Adhesion / Q000502:physiology; D004730:Endothelium, Vascular / Q000166:cytology* / Q000502:physiology; D007213:Indomethacin / Q000008:administration & dosage / Q000494:pharmacology; D007279:Injections, Subcutaneous; D007962:Leukocytes / Q000166:cytology* / Q000502:physiology; D007975:Leukotriene B4 / Q000008:administration & dosage / Q000494:pharmacology; D008297:Male; D008642:Mesenteric Veins / Q000166:cytology* / Q000502:physiology; D008795:Metronidazole / Q000494:pharmacology*; D051381:Rats; D014699:Venules / Q000166:cytology* / Q000502:physiology
chemical_list: D008795:Metronidazole; D007975:Leukotriene B4; D007213:Indomethacin