title: MnTBAP, a synthetic metalloporphyrin, inhibits production of tumor necrosis factor-alpha in lipopolysaccharide-stimulated RAW 264.7 macrophages cells via inhibiting oxidative stress-mediating p38 and SAPK/JNK signaling.
abstract: Antioxidants are able to inhibit inflammatory gene expression in response to lipopolysaccharide via down-regulating generation of intracellular reactive oxygen species (ROS) as second messengers. The effect of manganese (III) tetrakis (4-benzoic acid) porphyrin (MnTBAP), a synthetic metalloporphyrin with antioxidant activity, on tumor necrosis factor (TNF)-alpha production in lipopolysaccharide-stimulated RAW 264.7 macrophage cells was examined. MnTBAP prevented the generation of intracellular ROS in lipopolysaccharide-stimulated RAW 264.7 cells and further inhibited lipopolysaccharide-induced TNF-alpha production. MnTBAP exclusively prevented the phosphorylation of p38 mitogen-activated protein kinase (MAPK) and stress-activated protein kinase (SAPK/JNK) whereas it did not affect the phosphorylation and activation of nuclear factor-kappaB and extracellular signal regulated kinase 1/2. MnTBAP was suggested to inhibit lipopolysaccharide-induced TNF-alpha production by the prevention of intracellular ROS generation and subsequent inactivation of p38 MAPK and SAPK/JNK.
authors.affiliation: Department of Microbiology and Immunology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan.
authors.forename: Gantsetseg
authors.initials: G
authors.lastname: Tumurkhuu
authors.forename: Naoki
authors.initials: N
authors.lastname: Koide
authors.forename: Jargalsaikhan
authors.initials: J
authors.lastname: Dagvadorj
authors.forename: Ferdaus
authors.initials: F
authors.lastname: Hassan
authors.forename: Shamima
authors.initials: S
authors.lastname: Islam
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Naiki
authors.forename: Isamu
authors.initials: I
authors.lastname: Mori
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Yoshida
authors.forename: Takashi
authors.initials: T
authors.lastname: Yokochi
mesh_terms: D000818:Animals; D002460:Cell Line; D007155:Immunologic Factors / Q000494:pharmacology*; D048670:MAP Kinase Kinase 4 / Q000187:drug effects*; D008264:Macrophages / Q000187:drug effects* / Q000276:immunology; D008665:Metalloporphyrins / Q000494:pharmacology*; D051379:Mice; D019950:Mitogen-Activated Protein Kinase 1 / Q000378:metabolism; D048052:Mitogen-Activated Protein Kinase 3 / Q000378:metabolism; D016328:NF-kappa B / Q000187:drug effects; D018384:Oxidative Stress; D017382:Reactive Oxygen Species / Q000037:antagonists & inhibitors; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis*; D048051:p38 Mitogen-Activated Protein Kinases / Q000187:drug effects*
chemical_list: D007155:Immunologic Factors; D008665:Metalloporphyrins; D016328:NF-kappa B; D017382:Reactive Oxygen Species; D014409:Tumor Necrosis Factor-alpha; C097284:manganese(III)-tetrakis(4-benzoic acid)porphyrin; D019950:Mitogen-Activated Protein Kinase 1; D048052:Mitogen-Activated Protein Kinase 3; D048051:p38 Mitogen-Activated Protein Kinases; D048670:MAP Kinase Kinase 4