CTLA-4 trafficking and surface expression.

CTLA-4 trafficking and surface expression.
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DOI:
10.1016/j.it.2008.02.011
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发表时间:
2008-06
影响因子:
16.8
通讯作者:
Schneider H
Schneider H
中科院分区:
医学1区
文献类型:
--
作者:
Valk E;Rudd CE;Schneider H

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T细胞共受体细胞毒性T细胞抗原4(CTLA-4)具有强抑制作用,如CTLA-4缺陷小鼠的淋巴增殖表型所示。尽管CTLA-4对T细胞功能具有强效作用,但它主要是一种细胞内抗原,其表面表达受到限制性运输至细胞表面和快速内化的严格调控。最近,几种信号分子如Trim、PLD、ARF-1和TIRC 7已被描述参与CTLA-4向细胞表面的转运。表面表达水平的微小变化对T细胞活化的结果具有重大影响。CTLA-4表面表达的最佳调节对于刺激和抑制信号的平衡至关重要,以最大化保护性免疫应答,同时维持免疫耐受性和预防自身免疫。
The T-cell co-receptor cytotoxic T-cell antigen 4 (CTLA-4) has a strong inhibitory role as shown by the lymphoproliferative phenotype of CTLA-4-deficient mice. Despite its potent effects on T-cell function, CTLA-4 is primarily an intracellular antigen whose surface expression is tightly regulated by restricted trafficking to the cell surface and rapid internalisation. Recently, several signalling molecules such as Trim, PLD, ARF-1 and TIRC7 have been described to be involved in the transport of CTLA-4 to the cell surface. Minor changes in surface expression levels have major effects on the outcome of T-cell activation. Optimal regulation of CTLA-4 surface expression is crucial for the balance of stimulatory and inhibitory signals to maximize protective immune responses while maintaining immunological tolerance and preventing autoimmunity.
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发表时间: 2005-02-15
期刊: BLOOD
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