Functional implications of T cell receptor diversity.

Functional implications of T cell receptor diversity.
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DOI:
10.1016/j.coi.2009.05.004
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发表时间:
2009-06
影响因子:
7
通讯作者:
Doherty PC
Doherty PC
中科院分区:
医学2区
文献类型:
--
作者:
Turner SJ;La Gruta NL;Kedzierska K;Thomas PG;Doherty PC

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幼稚T细胞通过“足够”的热情识别一系列可能的抗原,被招募到任何给定的宿主反应中。选择更多样化的功能阵列是否能更好地控制免疫?也许低贪婪的“杀手”,“吻了就跑”,最有效地消灭了病毒感染的目标,而高贪婪的“助手”,忠实地呆在原地,产生更多的细胞因子。最近的研究结果确实表明,广泛的T细胞受体库的选择是抗原接触后初始阶段的特征,而持续暴露会导致进一步的分裂周期和“最适合”克隆型的渐进数字优势。在这里,我们回顾了最近的进展,证明了T细胞库多样性和感染免疫之间的联系,并考虑了潜在的机制。
Naive T cells are recruited into any given host response by recognizing a spectrum of possible antigens with “sufficient” avidity. Does selecting a more functionally diverse array give better immune control? Perhaps low avidity “killers” that “kiss and run” operate optimally to eliminate virus-infected targets, while high avidity “helpers” that stay faithfully in place produce more cytokine. Recent findings indeed suggest that selection of a broad T cell receptor repertoire is characteristic of the initial phase following antigen contact, while continued exposure leads to further cycles of division and the progressive numerical dominance of “best-fit” clonotypes. Here we review recent advances demonstrating a link between T cell repertoire diversity and immunity to infection, and consider the potential mechanisms at play.
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