Negative Regulation of Lymphocyte Activation by the Adaptor Protein LAX 1
Negative Regulation of Lymphocyte Activation by the Adaptor Protein LAX 1
复制标题
接头蛋白 LAX 1 对淋巴细胞激活的负调控
作者:
Minghua Zhu;Olivia Granillo;R. Wen;Kaiyong Yang;X. Dai;Demin Wang;Weiguo Zhang
The membrane-associated adaptor protein LAX is a linker for activation of T cells (LAT)-like molecule that is expressed in lymphoid tissues. Upon stimulation of T or B cells, it is phosphorylated and interacts with Grb2 and the p85 subunit of PI3K. LAX, however, is not capable of replacing LAT in the TCR signaling pathway. In this study we report that upon T or B cell activation, the LAX protein was up-regulated dramatically. Although disruption of the LAX gene by homologous recombination had no major impact on lymphocyte development, it caused a significant reduction in CD23 expression on mature B cells. Interestingly, naive LAX−/− mice had spontaneous germinal center formation. Compared with normal T and B cells, LAX−/− T and B cells were hyperresponsive and had enhanced calcium flux, protein tyrosine phosphorylation, MAPK and Akt activation, and cell survival upon engagement of the T or B AgRs. Our data demonstrate that LAX functions as a negative regulator in lymphocyte signaling.
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影响因子:
56.9
作者:
L. Peso;M. González‐García;C. Page;R. Herrera;G. Núñez
通讯作者:
L. Peso;M. González‐García;C. Page;R. Herrera;G. Núñez
DOI:
10.1165/ajrcmb.20.1.3299
发表时间:
1999
期刊:
American journal of respiratory cell and molecular biology.
影响因子:
--
作者:
Cernadas,M;DeSanctis,GT;Krinzman,SJ;Mark,DA;Donovan,CE;Listman,JA;Kobzik,L;Kikutani,H;Christiani,DC;Perkins,DL;Finn,PW
通讯作者:
Finn,PW
影响因子:
32.4
作者:
Lu, BF;Yu, H;Flavell, RA
通讯作者:
Flavell, RA
影响因子:
56.9
作者:
Cardone, MH;Roy, N;Reed, JC
通讯作者:
Reed, JC