TLR7 Signaling in Lupus B Cells: New Insights into Synergizing Factors and Downstream Signals.

TLR7 Signaling in Lupus B Cells: New Insights into Synergizing Factors and Downstream Signals.
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DOI:
10.1007/s11926-021-01047-1
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发表时间:
2021-11-24
影响因子:
5
通讯作者:
Satterthwaite AB
Satterthwaite AB
中科院分区:
医学2区
文献类型:
--
作者:
Satterthwaite AB

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Systemic Lupus Erythematosus (SLE) is driven by nucleic acid-containing antigens that stimulate endosomal TLRs. We review new advances in our understanding of how TLR7 signaling in B cells drives autoimmunity. Pathogenic B cell responses to TLR7 engagement are shaped by the disease-associated cytokine environment. TLR7, IFNγ and IL-21 together promote the formation of autoreactive germinal centers and the ABC/DN2 B cell subset. BAFF and type 1 IFNs enhance autoantibody production from transitional B cells in concert with TLR7. TLR7 signaling components STAT1, BANK1, IRF5, SLC15A4 and CXorf21/TASL are associated genetically with SLE and important for lupus development in mice, while role of T-bet is controversial. Proper control of TLR7 trafficking by UNC93B1, syntenin-1, and αvβ3 integrin is critical for preventing autoimmunity. A better understanding of TLR7 signaling has revealed potential new therapeutic approaches for SLE, several of which are being tested in animal models or clinical trials.
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