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- W2974366835 abstract "Abstract The AM14 BCR, derived from an autoimmune MRL/lpr mouse, binds autologous IgG2aa/j with low affinity, and as a result, AM14 B cells only proliferate in response to IgG2a immune complexes that incorporate DNA, RNA, or nucleic acid–binding proteins that serve as autoadjuvants. As such, AM14 B cells have served as a useful model for demonstrating the importance of BCR/TLR coengagement in the activation of autoreactive B cells. We now show that the same receptor recognizes an additional murine-encoded Ag, expressed by B6 splenocytes, with sufficient avidity to induce a TLR-independent proliferative response of BALB/c AM14 Vκ8 B cells both in vivo and in vitro. Moreover, detection of this cross-reactive Ag by B6 AM14 Vκ8 B cells promotes an anergic phenotype as reflected by suboptimal responses to BCR cross-linking and the absence of mature B cells in the bone marrow. The B6 Ag further impacts B cell development as shown by a dramatically expanded marginal zone compartment and extensive receptor editing in B6 AM14 Vκ8 mice but not BALB/c AM14 Vκ8 mice. Despite their anergic phenotypes, B6 AM14 Vκ8 B cells can respond robustly to autoantigen/autoadjuvant immune complexes and could therefore participate in both autoimmune responses and host defense." @default.
- W2974366835 created "2019-09-26" @default.
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- W2974366835 date "2019-10-15" @default.
- W2974366835 modified "2023-10-02" @default.
- W2974366835 title "Cross-Reactive Antigen Expressed by B6 Splenocytes Drives Receptor Editing and Marginal Zone Differentiation of IgG2a-Reactive AM14 Vκ8 B Cells" @default.
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- W2974366835 doi "https://doi.org/10.4049/jimmunol.1900499" @default.
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