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- W2317430088 abstract "B lymphocyte stimulator (BLyS) and APRoliferation inducing ligand (APRIL) are members of the TNF superfamily that regulate B-cell survival and autoreactivity. To further understand the significance of elevated BLyS and APRIL in systemic lupus erythematosus (SLE), we examined the expression profiles of their receptors (B-cell-activating factor (BAFF)-R, transmembrane activator and calcium modulator and cyclophilin ligand interactor, and B cell maturation antigen (BCMA)) on B-cell subsets in SLE and also investigated the differential expression and function of BCMA in TLR9-induced B-cell activation. While BAFF-R expression on SLE B cells was significantly lower compared to healthy control B cells (p = 0.003), BCMA expression was substantially higher on SLE B cells (p = 0.038), especially on memory cells and plasmablasts. BCMA(+) cells had higher CD19 and CD86 expression, indicating a greater degree of activation in both healthy and lupus patients. CpG stimulation increased BCMA expression on B cells and induced the proliferation and maturation of BCMA(+) B cells. A BCMA agonistic antibody also enhanced CpG-induced proliferation, activation, and IgG secretion by B cells in both healthy controls and lupus patients. Furthermore, the agonistic BCMA antibody co-stimulated auto-antibody production by CpG-stimulated lupus B cells in vitro. Signaling through BCMA enhances B cell activation following exposure to TLR9 agonists, and increased expression in SLE may contribute to the production of IgG autoantibodies." @default.
- W2317430088 created "2016-06-24" @default.
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- W2317430088 date "2011-01-20" @default.
- W2317430088 modified "2023-09-26" @default.
- W2317430088 title "Increased BCMA expression in lupus marks activated B cells, and BCMA receptor engagement enhances the response to TLR9 stimulation" @default.
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- W2317430088 doi "https://doi.org/10.3109/08916934.2010.509122" @default.
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