Antigen-induced oligomerization of the B cell receptor is an early target of Fc gamma RIIB inhibition.

Antigen-induced oligomerization of the B cell receptor is an early target of Fc gamma RIIB inhibition.
复制标题

DOI:
10.4049/jimmunol.0902334
复制
发表时间:
2010-02-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Pierce SK
Pierce SK
中科院分区:
其他
文献类型:
--
作者:
Liu W;Won Sohn H;Tolar P;Meckel T;Pierce SK

文献摘要

参考文献

被引文献

相似文献

FcγRIIB 是一种有效的抑制性共受体,可阻断响应免疫复合物的 BCR 信号传导,因此在调节 Ab 反应中发挥决定性作用。最近,高分辨率活细胞成像在 B 细胞研究中的应用为 Ag 结合数秒内启动 BCR 信号传导的最早事件提供了新的分子细节。在这项研究中,我们报告说,当通过免疫复合物与 BCR 结合时,FcγRIIB 与 BCR 共定位于微观簇中,并阻断启动 BCR 信号传导的最早事件,包括这些簇内 BCR 的寡聚化、BCR 主动招募到这些簇以及由此产生的扩散和收缩反应。荧光共振能量转移分析表明,阻断这些早期事件可能不需要 BCR 和 FcγRIIB 的细胞质结构域的分子接近,而是依赖于 FcγRIIB 与膜中筏脂质的快速且持续的结合。这些结果可能为旨在调节 FcγRIIB 以控制自身免疫性疾病中的 Ab 反应的治疗提供新的早期靶点。
The FcγRIIB is a potent inhibitory coreceptor that blocks BCR signaling in response to immune complexes and, as such, plays a decisive role in regulating Ab responses. The recent application of high-resolution live cell imaging to B cell studies is providing new molecular details of the earliest events in the initiation BCR signaling that follow within seconds of Ag binding. In this study, we report that when colligated to the BCR through immune complexes, the FcγRIIB colocalizes with the BCR in microscopic clusters and blocks the earliest events that initiate BCR signaling, including the oligomerization of the BCR within these clusters, the active recruitment of BCRs to these clusters, and the resulting spreading and contraction response. Fluorescence resonance energy transfer analyses indicate that blocking these early events may not require molecular proximity of the cytoplasmic domains of the BCR and FcγRIIB, but relies on the rapid and sustained association of FcγRIIB with raft lipids in the membrane. These results may provide novel early targets for therapies aimed at regulating the FcγRIIB to control Ab responses in autoimmune disease.
DOI: 10.1523/jneurosci.0346-04.2004
发表时间: 2004-04-21
影响因子: 5.3
作者:
Li, Q;Lau, A;Stanley, EF
通讯作者: Stanley, EF
DOI: 10.1021/bi00772a008
发表时间: 1972-01-01
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
AREND, WP;MANNIK, M;TELLER, DC
通讯作者: TELLER, DC
DOI: 10.1016/s1074-7613(04)00105-0
发表时间: 2004-05-01
期刊: IMMUNITY
影响因子: 32.4
作者:
Carrasco, YR;Fleire, SJ;Batista, FD
通讯作者: Batista, FD
DOI: 10.1073/pnas.81.19.6159
发表时间: 1984-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
BRIAN, AA;MCCONNELL, HM
通讯作者: MCCONNELL, HM
DOI: 10.1038/353765a0
发表时间: 1991-10-24
期刊: NATURE
影响因子: 64.8
作者:
HARTLEY, SB;CROSBIE, J;GOODNOW, CC
通讯作者: GOODNOW, CC