title: Upregulatory effects of cefpimizole natrium on human leukocytes.
abstract: Cefpimizole natrium (CPIZ), an antibiotic belonging to the cephalosporins, was examined regarding its influence on neutrophil functions. Neutrophil superoxide (O2-) generation increased by intravenous CPIZ in patients with maxillofacial diseases. In vitro examination revealed that CPIZ directly stimulates neutrophils to generate O2- in a dose-dependent manner, though the induction ability is not as strong as phorbol myristate acetate (PMA). Protein kinase C (PKC) activity in the neutrophil plasma membrane increased after CPIZ treatment, while the activity in the cytosol fraction decreased. CPIZ cooperated with biological response modifiers (BRMs) such as sizofilan, lentinan, OK-432, rIL-2 and rIFN-gamma in neutrophil O2- generation. Non-specific cytotoxicity against K562 cells and candida cells was also enhanced by neutrophil pretreatment with both CPIZ and one of the BRMs except for sizofilan and rIL-2. From these results it can be concluded that CPIZ directly enhanced neutrophil O2- generation and that these CPIZ activations are further beneficial to protection against bacterial infections.
authors.affiliation: Department of Oral Surgery, Kochi Medical School, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Ueta
authors.forename: K
authors.initials: K
authors.lastname: Yoneda
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.forename: T
authors.initials: T
authors.lastname: Osaki
mesh_terms: D002478:Cells, Cultured; D002511:Cephalosporins / Q000494:pharmacology*; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D006801:Humans; D007376:Interleukin-2 / Q000494:pharmacology; D009504:Neutrophils / Q000187:drug effects* / Q000502:physiology; D011493:Protein Kinase C / Q000032:analysis; D011994:Recombinant Proteins / Q000494:pharmacology; D013481:Superoxides / Q000378:metabolism; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D015854:Up-Regulation
chemical_list: D002511:Cephalosporins; D007376:Interleukin-2; D011994:Recombinant Proteins; D013481:Superoxides; C038845:cefpimizole; D011493:Protein Kinase C; D013755:Tetradecanoylphorbol Acetate