title: Respiratory burst in peritoneal exudate cells in response to a modified tuftsin.
abstract: Intraperitoneal administration of tuftsin-M [Thr-Lys-Pro-Arg-NH-(CH2)2-NH-CO-C15H31] to Balb/C mice has been shown to induce a respiratory burst in the peritoneal exudate cells. The macrophages exhibited enhanced levels of O2-, H2O2, NADPH oxidase and myeloperoxidase, but the activities of superoxide dismutase, catalase and glutathione peroxidase remained virtually unchanged. The magnitude of the oxidative burst depended directly on the dose of tuftsin-M; higher activity was observed at higher doses of the peptide. Tuftsin-M enhanced the generation of both O2- and H2O2 under in vitro conditions, as did phorbol myristate acetate. These results suggest that tuftsin-M could enhance non-specific defence against infections by activating the macrophages.
authors.affiliation: Division of Biochemistry, Central Drug Research Institute, Lucknow, India.
authors.forename: S P
authors.initials: SP
authors.lastname: Singh
authors.forename: R
authors.initials: R
authors.lastname: Chhabra
authors.forename: V M
authors.initials: VM
authors.lastname: Srivastava
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D002374:Catalase / Q000378:metabolism; D005029:Ethylenediamines / Q000008:administration & dosage / Q000494:pharmacology*; D005979:Glutathione Peroxidase / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000378:metabolism*; D066298:In Vitro Techniques; D007274:Injections, Intraperitoneal; D007700:Kinetics; D008264:Macrophages / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D009247:NADH, NADPH Oxidoreductases / Q000378:metabolism; D019255:NADPH Oxidases; D009195:Peroxidase / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism; D013481:Superoxides / Q000378:metabolism*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014405:Tuftsin / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D005029:Ethylenediamines; D013481:Superoxides; C077747:tuftsin-M; D006861:Hydrogen Peroxide; D002374:Catalase; D009195:Peroxidase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D009247:NADH, NADPH Oxidoreductases; D019255:NADPH Oxidases; D013755:Tetradecanoylphorbol Acetate; D014405:Tuftsin