2000
DOI: 10.4049/jimmunol.165.10.5788
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Amplification of IL-1β-Induced Matrix Metalloproteinase-9 Expression by Superoxide in Rat Glomerular Mesangial Cells Is Mediated by Increased Activities of NF-κB and Activating Protein-1 and Involves Activation of the Mitogen-Activated Protein Kinase Pathways

Abstract: The modulation of cell signaling by free radicals is important for the pathogenesis of inflammatory diseases. Recently, we have shown that NO reduces IL-1β-induced matrix metalloproteinase (MMP-9) expression in glomerular mesangial cells (MC). Here we report that exogenously administrated superoxide, generated by the hypoxanthine/xanthine oxidase system (HXXO) or by the redox cycler 2,3-dimethoxy-1,4-naphtoquinone, caused a marked amplification of IL-1β-primed, steady state, MMP-9 mRNA level and an increase in… Show more

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Cited by 202 publications
(191 citation statements)
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References 51 publications
(46 reference statements)
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“…Cigarette smoke may increase matrix metalloproteinase expression via activation of inflammatory transcription factors. The expression of the AP-1 transcription factor complex is positively associated with matrix metalloproteinase expression, 94,95 and cigarette smoke is associated with increased expression of AP-1. 96,97 Secretion of MMP-1 and MMP-3 from macrophages stimulated in vitro or in vivo depends on the activation of NF-B, 98 and NF-B is required for cytokine upregulation of MMP-1, MMP-3, and MMP-9 in VSMCs.…”
Section: Smoking and Regulation Of Matrix Metalloproteinase Activitymentioning
confidence: 99%
“…Cigarette smoke may increase matrix metalloproteinase expression via activation of inflammatory transcription factors. The expression of the AP-1 transcription factor complex is positively associated with matrix metalloproteinase expression, 94,95 and cigarette smoke is associated with increased expression of AP-1. 96,97 Secretion of MMP-1 and MMP-3 from macrophages stimulated in vitro or in vivo depends on the activation of NF-B, 98 and NF-B is required for cytokine upregulation of MMP-1, MMP-3, and MMP-9 in VSMCs.…”
Section: Smoking and Regulation Of Matrix Metalloproteinase Activitymentioning
confidence: 99%
“…are similar to other MMPs except for the addition of a transmembrane domain and a cytoplasmic tail at the C terminus; and MT-MMPs are also expressed in many carcinomas (Seiki, 1999). The activities of the MMPs are regulated by gene expression (Eberhardt et al, 2000;Sato and Seiki, 1993), proenzyme activation (Crabbe et al, 1994;Imai et al, 1995) and inhibition of the active enzymes by their specific tissue inhibitors (Gomez et al, 1997).…”
Section: Introductionmentioning
confidence: 99%
“…MMP-9 Induction in C6 Cells or in Clones Overexpressing PKC-Is NF-B-dependent-Up-regulation of mmp-9 gene expression upon exposure to inflammatory cytokines critically depends on the activation of NF-B (24,25). To evaluate the possible implication of this transcription factor in the regulation of MMP-9 by PKC-, we tested the effect of an NF-Bspecific inhibitory peptide, SN50, that blocks its translocation to the nucleus (26).…”
Section: Fig 2 Induction Of Pkc-activity By Il-1 and Tnf-␣mentioning
confidence: 99%