Cutting Edge: A Threshold of B Cell Costimulatory Signals Is Required for Spontaneous Germinal Center Formation in Autoimmunity.
Cutting Edge: A Threshold of B Cell Costimulatory Signals Is Required for Spontaneous Germinal Center Formation in Autoimmunity.
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DOI:
10.4049/jimmunol.2100548
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发表时间:
2021-11-01
期刊:
影响因子:
--
通讯作者:
Jackson SW
中科院分区:
文献类型:
--
作者:
Chiang K;Largent AD;Arkatkar T;Thouvenel CD;Du SW;Shumlak N;Woods J;Li QZ;Liu Y;Hou B;Rawlings DJ;Jackson SW
Cognate interactions between autoreactive B and T cells promote systemic lupus erythematosus (SLE) pathogenesis by, inter alia, facilitating spontaneous germinal center (GC) formation. Whereas both myeloid and B cell antigen presenting cells (APCs) express B7 ligands (CD80 and CD86), the prevailing model holds that dendritic cell (DC) costimulation is sufficient for CD28-dependent T cell activation. Here, we report that B cell-intrinsic CD80/CD86 deletion unexpectedly abrogates GCs in murine lupus. Interestingly, absent GCs differentially impacted serum autoantibodies (autoAb). In keeping with distinct extra-follicular (EF) and GC activation pathways driving lupus autoAb, lack of GCs correlated with loss of RNA-associated autoAb but preserved anti-dsDNA and connective tissue autoAb titers. Strikingly, even heterozygous B cell CD80/CD86 deletion was sufficient to prevent autoimmune GCs and RNA-associated autoAb. Together, these findings identify a key mechanism whereby B cells promote lupus pathogenesis, by providing a threshold of costimulatory signals required for autoreactive T cell activation.
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