Ezrin tunes the magnitude of humoral immunity.
Ezrin tunes the magnitude of humoral immunity.
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DOI:
10.4049/jimmunol.1301315
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发表时间:
2013-10-15
期刊:
影响因子:
--
通讯作者:
Gupta N
中科院分区:
文献类型:
--
作者:
Pore D;Parameswaran N;Matsui K;Stone MB;Saotome I;McClatchey AI;Veatch SL;Gupta N
Ezrin is a member of the Ezrin-Radixin-Moesin (ERM) family of membrane-actin cytoskeleton crosslinkers that participate in a variety of cellular processes. In B cells, phosphorylation of ezrin at different sites regulates multiple processes such as lipid raft coalescence, BCR diffusion, microclustering, and endosomal JNK activation. In this study, we generated mice with conditional deletion of ezrin in the B cell lineage to investigate the physiological significance of ezrin’s function in antigen receptor-mediated B cell activation and humoral immunity. B cell development, as well as the proportion and numbers of major B cell subsets in peripheral lymphoid organs were unaffected by the loss of ezrin. Using super resolution imaging methods we show that in the absence of ezrin, BCRs respond to antigen binding by accumulating into larger and more stable signaling microclusters. Loss of ezrin led to delayed BCR capping and accelerated lipid raft coalescence. While proximal signaling proteins showed stronger activation in the absence of ezrin, components of the distal BCR signaling components displayed distinct effects. Ezrin deficiency resulted in increased B cell proliferation and differentiation into antibody-secreting cells ex vivo, and stronger T cell-independent and -dependent responses to antigen in vivo. Overall, our data demonstrate that ezrin regulates amplification of BCR signals and tunes the strength of B cell activation and humoral immunity.
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DOI:
10.4049/jimmunol.1102322
发表时间:
2012-04-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Davey AM;Pierce SK
通讯作者:
Pierce SK
影响因子:
3.7
作者:
Chen EJ;Shaffer MH;Williamson EK;Huang Y;Burkhardt JK
通讯作者:
Burkhardt JK
影响因子:
4.4
作者:
Cheng, PC;Brown, BK;Pierce, SK
通讯作者:
Pierce, SK
影响因子:
30.5
作者:
Faure, S;Salazar-Fontana, LI;Delon, J
通讯作者:
Delon, J
影响因子:
32.4
作者:
Liu W;Meckel T;Tolar P;Sohn HW;Pierce SK
通讯作者:
Pierce SK