Sustained signaling by canonical helper T cell cytokines throughout the reactive lymph node.

Sustained signaling by canonical helper T cell cytokines throughout the reactive lymph node.
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DOI:
10.1038/ni.1866
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发表时间:
2010-06
期刊:
影响因子:
30.5
通讯作者:
--
中科院分区:
医学1区
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--
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细胞因子是调节免疫应答的可溶性蛋白质。目前的范例是淋巴组织中的细胞因子产生是紧密定位的,并且信号传导发生在缀合细胞之间。在这里,我们评估细胞因子信号在感染过程中通过测量在体内磷酸化的细胞内信号转导和转录激活因子(STAT)。我们发现,干扰素γ(IFN-γ)和白细胞介素4(IL-4)的信号,以大多数淋巴细胞在整个反应性淋巴结,和IL-4的调节幼稚,旁观者细胞足以推翻相反的Th 1指令。我们的研究结果表明,尽管局部生产,细胞因子可以渗透淋巴结和修改其中的大多数细胞。旁观者细胞的细胞因子调节可以提供一种机制,通过这种机制,慢性蠕虫感染破坏宿主对后续感染或疫苗接种尝试的反应。
Cytokines are soluble proteins that regulate immune responses. A current paradigm is that cytokine production in lymphoid tissues is tightly localized and signaling occurs between conjugate cells. Here we assess cytokine signaling during infection by measuring in vivo phosphorylation of intracellular signal transducers and activators of transcription (STATs). We show that interferon γ (IFN-γ) and interleukin 4 (IL-4) signal to the majority of lymphocytes throughout the reactive lymph node, and that IL-4 conditioning of naïve, bystander cells is sufficient to override opposing Th1 instruction. Our results demonstrate that, despite localized production, cytokines can permeate a lymph node and modify the majority of cells therein. Cytokine conditioning of bystander cells could provide a mechanism by which chronic worm infections subvert the host response to subsequent infections or vaccination attempts.
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影响因子: --
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影响因子: 32.4
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