title: Influence of ibuprofen on the infection with Listeria monocytogenes.
abstract: Listeria monocytogenes is a bacterial infection, which is facultatively localized in monocytes and macrophages. The influence of ibuprofen (CAS 15687-27-1), a nonsteroidal anti-inflammatory drug (NSAID), on this bacterial infection in balb/c mice was investigated. One day prior to sublethal infection, balb/c mice were treated intravenously with various therapeutic concentrations of ibuprofen alone or ibuprofen in combination with a suboptimal dosage of murine recombinant interferon gamma, a lymphokine produced by T-helper cells. Three days post-infection, parasite burdens of the mainly infected organs, spleen and liver, were determined by the colony-forming unit assay. It was shown that the prophylactic treatment with ibuprofen in a concentration of 4 mg/kg body weight resulted in a more than 10-fold reduction of viable Listeria monocytogenes in the spleen, whereas in liver 12 mg/kg Ibuprofen was necessary for a comparable kill of viable bacteria. A higher concentration of ibuprofen did not resulted in a higher antibacterial efficacy. In order to clarify the mechanism of ibuprofen action, molecular-biological experiments were performed to measure the messenger RNA (mRNA) induced by ibuprofen. It is presented here that therapeutic concentrations of ibuprofen induced significant higher amounts of mRNA for interleukin-1 in human monocytes compared to untreated cells. These findings support the hypothesis that ibuprofen influences the complex immune system to overcome a bacterial infection.
authors.affiliation: Fraunhofer Institute for Toxicology, Department of Immunology, Hannover, Fed. Rep. of Germany.
authors.forename: S
authors.initials: S
authors.lastname: Hockertz
authors.forename: R
authors.initials: R
authors.lastname: Heckenberger
authors.forename: A
authors.initials: A
authors.lastname: Emmendörffer
authors.forename: M
authors.initials: M
authors.lastname: Müller
mesh_terms: D000818:Animals; D015152:Blotting, Northern; D002460:Cell Line; D005260:Female; D006801:Humans; D007052:Ibuprofen / Q000008:administration & dosage / Q000627:therapeutic use*; D007371:Interferon-gamma / Q000627:therapeutic use; D007375:Interleukin-1 / Q000096:biosynthesis; D008088:Listeriosis / Q000188:drug therapy* / Q000382:microbiology; D051379:Mice; D008807:Mice, Inbred BALB C; D009000:Monocytes / Q000187:drug effects / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis / Q000096:biosynthesis
chemical_list: D007375:Interleukin-1; D012333:RNA, Messenger; D007371:Interferon-gamma; D007052:Ibuprofen