title: Effect of S-(1,2-dicarboxyethyl) glutathione and S-(1,2-dicarboxyethyl) cysteine on the stimulus-induced superoxide generation and tyrosyl phosphorylation of proteins in human neutrophils.
abstract: We investigated the effects of S-(1,2-dicarboxyethyl) glutathione (DCEG) and S-(1,2-dicarboxyethyl) cysteine (DCEC) on the stimulus-induced superoxide generation and tyrosyl phosphorylation of proteins in human neutrophils. When the cells were preincubated with DCEG, the superoxide generation induced by N-formyl-methionyl-leucyl-phenylalanine (fMLP) was enhanced in concentration-dependent manner but DCEC showed no effect. The influence of DCEG and DCEC on phorbol 12-myristate 13-acetate-induced superoxide generation showed no effect. On the other hand, the superoxide generation induced by arachidonic acid was markedly suppressed by DCEG and DCEC in concentration-dependent manner. The suppression of DCEG was more effective than that of DCEC. The superoxide generation induced by fMLP in the DCEG-treated cells was suppressed by genistein. DCEG enhanced tyrosyl phosphorylation of 80.0 kDa, 60.0 kDa, and 45.0 kDa proteins in human neutrophils. The tyrosyl phosphorylation of 80.0 kDa, 60.0 kDa, and 45.0 kDa proteins was suppressed by genistein. The enhancement of tyrosyl phosphorylation of these proteins in the DCEG-treated cells was parallel to the enhancement of the fMLP-induced superoxide generation.
authors.affiliation: Department of Anesthesiology and Resuscitology, Kochi Medical School, Kochi, Japan
authors.forename: Chunlei
authors.initials: C
authors.lastname: Wang
authors.forename: Huangwei
authors.initials: H
authors.lastname: Lu
authors.forename: Guang
authors.initials: G
authors.lastname: Chen
authors.forename: Koichi
authors.initials: K
authors.lastname: Yamashita
authors.forename: Masanobu
authors.initials: M
authors.lastname: Manabe
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kodama
mesh_terms: D016718:Arachidonic Acid / Q000494:pharmacology; D001798:Blood Proteins / Q000737:chemistry / Q000378:metabolism; D003545:Cysteine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology; D019833:Genistein / Q000494:pharmacology; D005978:Glutathione / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D015151:Immunoblotting; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology; D009504:Neutrophils / Q000187:drug effects* / Q000378:metabolism*; D010766:Phosphorylation; D013481:Superoxides / Q000378:metabolism*; D013755:Tetradecanoylphorbol Acetate / Q000031:analogs & derivatives / Q000494:pharmacology; D014443:Tyrosine / Q000378:metabolism
chemical_list: D001798:Blood Proteins; D004791:Enzyme Inhibitors; D013481:Superoxides; C041581:S-(1,2-dicarboxyethyl)glutathione; D016718:Arachidonic Acid; C017212:S-(1,2-dicarboxyethyl)cysteine; D014443:Tyrosine; C016658:phorbolol myristate acetate; D009240:N-Formylmethionine Leucyl-Phenylalanine; D019833:Genistein; D005978:Glutathione; D003545:Cysteine; D013755:Tetradecanoylphorbol Acetate