CD4+ T cell effects on CD8+ T cell location defined using bioluminescence.

CD4+ T cell effects on CD8+ T cell location defined using bioluminescence.
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DOI:
10.1371/journal.pone.0016222
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发表时间:
2011-01-20
期刊:
影响因子:
3.7
通讯作者:
Crispe IN
Crispe IN
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Azadniv M;Bowers WJ;Topham DJ;Crispe IN

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CD8+类T淋巴细胞在传递细胞毒功能和控制病毒和细胞内感染方面起着关键作用。这些细胞得到了CD4+类T淋巴细胞的帮助,这些T淋巴细胞促进了它们的激活、克隆性扩张、充分分化和持久记忆。在这项研究中,我们通过抗体介导的CD4+T细胞耗尽和成像抗原驱动的生物发光CD8+T细胞在活体小鼠体内的重新分布,研究了CD4+T细胞对CD8+T细胞位置的影响。我们发现,CD4+T细胞影响CD8+T细胞的生物分布,有利于CD8+T细胞定位于腹部淋巴结。流式细胞仪分析显示,这与特定整合素的表达增加有关。初始CD8+T细胞激活时存在的CD4+T细胞也会影响它们在记忆阶段的生物分布。基于这些结果,我们提出了一个模型,即CD4+T细胞“帮助”的功能之一是编程CD8+T细胞的归巢潜能。
T lymphocytes of the CD8+ class are critical in delivering cytotoxic function and in controlling viral and intracellular infections. These cells are “helped” by T lymphocytes of the CD4+ class, which facilitate their activation, clonal expansion, full differentiation and the persistence of memory. In this study we investigated the impact of CD4+ T cells on the location of CD8+ T cells, using antibody-mediated CD4+ T cell depletion and imaging the antigen-driven redistribution of bioluminescent CD8+ T cells in living mice. We documented that CD4+ T cells influence the biodistribution of CD8+ T cells, favoring their localization to abdominal lymph nodes. Flow cytometric analysis revealed that this was associated with an increase in the expression of specific integrins. The presence of CD4+ T cells at the time of initial CD8+ T cell activation also influences their biodistribution in the memory phase. Based on these results, we propose the model that one of the functions of CD4+ T cell “help” is to program the homing potential of CD8+ T cells.
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