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- W2151049082 abstract "Monocyte chemoattractant protein-1 (MCP-1) is a potent chemokine synthesized by several cell types, e.g., inflammatory cells, such as monocytes, and resident renal cells, such as human tubular epithelial cells (TECs). Besides induction of monocyte recruitment, MCP-1 has been suggested to induce non-leukocytes to produce cytokines and adhesion molecules. Inflammation of the tubulointerstitium is a hallmark of many renal diseases and contributes to progression of renal failure; the purpose therefore of this study was to investigate the influence of MCP-1 on markers of inflammatory activation in human TECs. MCP-1 stimulated interleukin-6 (IL-6) secretion and intercellular adhesion molecule-1 (ICAM-1) synthesis in a time- and dose-dependent manner. In parallel, MCP-1 increased IL-6 and ICAM-1 mRNA expression in human TECs. Pretreatment with pertussis toxin, GF109203X, BAPTA-AM, and pyrrolidine dithiocarbamate inhibited MCP-1-dependent IL-6 and ICAM-1 synthesis, suggesting the involvement of Gi-proteins, protein kinase C, intracellular Ca(2+), and nuclear factor-kappaB (NF-kappaB) in MCP-1 signaling. Using electrophoretic gel mobility shift assay, we observed that MCP-1 stimulated binding activity of NF-kappaB. Binding activity of the activator protein-1 (AP-1), which has been implicated to regulate induction of the IL-6 gene together with NF-kappaB, was also stimulated by MCP-1. In the present experiments, NF-kappaB and AP-1 were involved in the MCP-1-mediated induction of IL-6, as demonstrated by cis element double-stranded (decoy) oligonucleotides (ODN). In contrast to IL-6 release, MCP-1-induced ICAM-1 expression was predominantly dependent on NF-kappaB activation. These results document for the first time that MCP-1 induces an inflammatory response in human TECs. This may be an important new mechanism in the pathogenesis of tubulointerstitial inflammation." @default.
- W2151049082 created "2016-06-24" @default.
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- W2151049082 date "2002-06-01" @default.
- W2151049082 modified "2023-10-16" @default.
- W2151049082 title "MCP-1 Induces Inflammatory Activation of Human Tubular Epithelial Cells" @default.
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- W2151049082 doi "https://doi.org/10.1097/01.asn.0000015609.31253.7f" @default.
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