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- W2100090670 abstract "How bacterial or viral infections trigger flares of autoimmunity is poorly understood. As toll-like receptor (TLR)-9 activation by exogenous or endogenous CpG-DNA may contribute to disease activity of systemic lupus erythematosus, we examined the effects of CpG-oligodeoxynucleotides (ODN) or DNA derived from Escherichia coli (E. coli) on the course of nephritis in MRL(lpr/lpr) mice. In kidneys of these mice, TLR9 localized to glomerular, tubulointerstitial, and perivascular infiltrates. After intraperitoneal injection labeled CpG-ODN localized to glomerular and interstitial macrophages and dendritic cells in nephritic kidneys of MRL(lpr/lpr) mice but not in healthy MRL controls. Furthermore, murine J774 macrophages and splenocytes from MRL(lpr/lpr) mice, but not tubular epithelial cells, renal fibroblasts, or mesangial cells, expressed TLR9 and up-regulated CCL5/RANTES mRNA upon stimulation with CpG-ODN in vitro. In vivo both E. coli DNA and CpG-ODN increased serum DNA autoantibodies of the IgG2a isotype in MRL(lpr/lpr) mice. This was associated with progression of mild to crescentic glomerulonephritis, interstitial fibrosis, and heavy proteinuria. CpG-ODN increased renal CCL2/MCP-1 and CCL5/RANTES expression associated with increased glomerular and interstitial leukocyte recruitment. In contrast control GpC-ODN had no effect. We conclude that TLR9 activation triggers disease activity of systemic autoimmunity, for example, lupus nephritis, and that adaptive and innate immune mechanisms contribute to the CpG-DNA-induced progression of lupus nephritis." @default.
- W2100090670 created "2016-06-24" @default.
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- W2100090670 date "2004-01-20" @default.
- W2100090670 modified "2023-09-25" @default.
- W2100090670 title "Activation of toll‐like receptor‐9 induces progression of renal disease in MRL‐Fas(lpr) mice" @default.
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- W2100090670 doi "https://doi.org/10.1096/fj.03-0646fje" @default.
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