Btk Supports Autoreactive B Cell Development and Protects against Apoptosis but Is Expendable for Antigen Presentation.
Btk Supports Autoreactive B Cell Development and Protects against Apoptosis but Is Expendable for Antigen Presentation.
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Btk支持自身反应性B细胞发育并防止细胞凋亡,但对于抗原呈递是消耗性的。
DOI:
10.4049/jimmunol.2000558
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发表时间:
2021-12-15
期刊:
影响因子:
--
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文献类型:
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Bruton’s tyrosine kinase (Btk) propogates B cell signaling, and BTK-inhibitors are in clinical trials for autoimmune disease. While autoreactive B cells fail to develop in the absence of Btk, its role in mature cells is unknown. To address this issue, a model of conditional removal (Btkflox/Cre-ERT2) was used to excise Btk from mature transgenic B cells that recognize the pathophysiologic autoantigen insulin. Anti-insulin B cells escape central tolerance and promote autoimmune diabetes, mimicking human autoreactive cells. Lifelong Btk-deficiency was previously shown to eliminate 95% of anti-insulin B cells but in this model mature anti-insulin B cells survived for weeks after targeted Btk deletion, even when competing with a polyclonal repertoire. BCR-stimulated cells could still signal via Syk, PLCy2 and CD22, but failed to upregulate the anti-apoptotic protein Bcl-xl, and proliferation was impaired. Surprisingly, Btk-depleted anti-insulin B cells could still present antigen and activate T cells, a critical function in promoting T cell-mediated islet cell destruction. Thus, pharmacologic targeting of Btk may be most effective by blocking expansion of established autoreactive cells, and preventing emergence of new ones.
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影响因子:
4.4
作者:
Bonami, Rachel H.;Sullivan, Allison M.;Kendall, Peggy L.
通讯作者:
Kendall, Peggy L.
DOI:
10.1084/jem.20080611
发表时间:
2009-01-16
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Duty JA;Szodoray P;Zheng NY;Koelsch KA;Zhang Q;Swiatkowski M;Mathias M;Garman L;Helms C;Nakken B;Smith K;Farris AD;Wilson PC
通讯作者:
Wilson PC
DOI:
10.4049/jimmunol.0900367
发表时间:
2009-11-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Kendall PL;Moore DJ;Hulbert C;Hoek KL;Khan WN;Thomas JW
通讯作者:
Thomas JW
影响因子:
5.3
作者:
KAWAKAMI, Y;YAO, LB;KAWAKAMI, T
通讯作者:
KAWAKAMI, T
DOI:
10.4049/jimmunol.1202104
发表时间:
2013-03-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Kendall PL;Case JB;Sullivan AM;Holderness JS;Wells KS;Liu E;Thomas JW
通讯作者:
Thomas JW