Involvement of avidity for major histocompatibility complex in homeostasis of naive and memory T cells.

Involvement of avidity for major histocompatibility complex in homeostasis of naive and memory T cells.
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在天真和记忆T细胞的体内稳态中,亲生的涉及主要组织相容性复合物。

DOI:
10.1084/jem.20021812
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发表时间:
2003-04-21
影响因子:
15.3
通讯作者:
Stockinger, B
Stockinger, B
中科院分区:
医学1区
文献类型:
--
作者:
Kassiotis, G;Zamoyska, R;Stockinger, B

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外周T细胞的生存和自我更新的需要以及控制初始池和记忆池大小的机制的性质尚不完全清楚。在这里,我们研究了主要组织相容性复合体(MHC)在幼稚T细胞和记忆T细胞的生存和稳态扩张中的作用。我们发现,初始T细胞受体(TCR)转基因T细胞的稳态行为可以通过TCR和CD5的表达水平推断,CD5是TCR信号的负调节因子。这两个因素决定了mhc衍生信号刺激TCR的强度。我们进一步表明,与幼稚T细胞类似,mhc来源的信号影响淋巴细胞减少条件下记忆T细胞的稳态扩张能力。然而,与幼稚T细胞相比,记忆T细胞可以达到稳态平衡,其中每个克隆的生存/自我更新与它们对mhc衍生信号的渴望分离。
The requirements for survival and self-renewal of peripheral T cells and the nature of mechanisms controlling the size of the naive and memory pool are not completely understood. Here, we examine the involvement of the major histocompatibility complex (MHC) in survival and homeostatic expansion of naive and memory T cells. We show that the homeostatic behavior of naive T cell receptor (TCR)-transgenic T cells can be deduced by the expression levels of TCR and CD5, a negative regulator of TCR signaling. Both these factors determine the strength of TCR stimulation by MHC-derived signals. We further show that, similarly to naive T cells, MHC-derived signals influence the homeostatic expansion capacity of memory T cells under lymphopenic conditions. In contrast to naive T cells, however, memory T cells can reach a homeostatic equilibrium, in which survival/self-renewal of each clone is dissociated from their avidity for MHC-derived signals.
DOI: 10.1016/s1074-7613(00)80092-8
发表时间: 1999-08-01
期刊: IMMUNITY
影响因子: 32.4
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期刊: NATURE IMMUNOLOGY
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