IRAK-4- and MyD88-dependent pathways are essential for the removal of developing autoreactive B cells in humans.

IRAK-4- and MyD88-dependent pathways are essential for the removal of developing autoreactive B cells in humans.
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DOI:
10.1016/j.immuni.2008.09.015
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发表时间:
2008-11-14
期刊:
影响因子:
32.4
通讯作者:
Meffre E
Meffre E
中科院分区:
医学1区
文献类型:
--
作者:
Isnardi I;Ng YS;Srdanovic I;Motaghedi R;Rudchenko S;von Bernuth H;Zhang SY;Puel A;Jouanguy E;Picard C;Garty BZ;Camcioglu Y;Doffinger R;Kumararatne D;Davies G;Gallin JI;Haraguchi S;Day NK;Casanova JL;Meffre E

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Most autoreactive B cells are normally counterselected during early B cell development. To determine whether Toll-like receptors (TLRs) regulate the removal of autoreactive B lymphocytes, we tested the reactivity of recombinant antibodies from single B cells isolated from patients deficient for IRAK-4, and MyD88, whose cells do not respond to TLRs except TLR3 and from UNC-93B-deficient patients whose cells are irresponsive to TLR3, TLR7, TLR8 and TLR9. All patients suffered from defective central and peripheral B cell tolerance checkpoints resulting in the accumulation of large numbers of autoreactive mature naïve B cells in their blood. Hence, TLR7, TLR8, and TLR9 may normally prevent the recruitment of developing autoreactive B cells in healthy donors. Paradoxically, IRAK-4-, MyD88- and UNC-93B-deficient patients do not display autoreactive antibodies in their serum nor develop autoimmune diseases revealing that IRAK-4/MyD88/UNC-93B pathways blockade is likely to thwart the development of autoimmunity in humans.
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