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- W2103402364 abstract "Abstract Objective To investigate the hypothesis that proteasome inhibition may have potential in the treatment of SLE, by targeting plasmacytoid dendritic cells (PDCs) and plasma cells, both of which are critical in disease pathogenesis. Methods Lupus‐prone mice were treated with the nonselective proteasome inhibitors carfilzomib and bortezomib, the immunoproteasome inhibitor ONX 0914, or vehicle control. Tissue was harvested and analyzed by flow cytometry using standard markers. Nephritis was monitored by evaluation for proteinuria and by histologic analysis of kidneys. Serum anti–double‐stranded DNA (anti‐dsDNA) levels were measured by enzyme‐linked immunosorbent assay (ELISA), and total IgG and dsDNA antibody‐secreting cells (ASCs) by enzyme‐linked immunospot assay. Human peripheral blood mononuclear cells or mouse bone marrow cells were incubated with Toll‐like receptor (TLR) agonists and proteasome inhibitors, and interferon‐α (IFNα) levels were measured by ELISA and flow cytometry. Results Early treatment of lupus‐prone mice with the dual‐targeting proteasome inhibitors carfilzomib or bortezomib or the immunoproteasome‐specific inhibitor ONX 0914 prevented disease progression, and treatment of mice with established disease dramatically abrogated nephritis. Treatment had profound effects on plasma cells, with greater reductions in autoreactive than in total IgG ASCs, an effect that became more pronounced with prolonged treatment and was reflected in decreasing serum autoantibody levels. Notably, proteasome inhibition efficiently suppressed production of IFNα by TLR‐activated PDCs in vitro and in vivo, an effect mediated by inhibition of both PDC survival and PDC function. Conclusion Inhibition of the immunoproteasome is equally efficacious as dual targeting agents in preventing lupus disease progression by targeting 2 critical pathways in disease pathogenesis, type I IFN activation and autoantibody production by plasma cells." @default.
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- W2103402364 date "2012-01-27" @default.
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- W2103402364 title "Beneficial effect of novel proteasome inhibitors in murine lupus via dual inhibition of type I interferon and autoantibody-secreting cells" @default.
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- W2103402364 doi "https://doi.org/10.1002/art.33333" @default.
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