The CD4⁺ T-cell help signal is transmitted from APC to CD8⁺ T-cells via CD27-CD70 interactions.

The CD4⁺ T-cell help signal is transmitted from APC to CD8⁺ T-cells via CD27-CD70 interactions.
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DOI:
10.1038/ncomms1948
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发表时间:
2012-07-10
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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CD 8+细胞毒性T淋巴细胞是针对感染性病原体、肿瘤以及在致病性自身免疫的情况下正常自身组织的免疫的关键组分。CD 4 + T(TH)细胞通过首先经由CD 40-CD 40 L相互作用激活抗原呈递细胞,在引发期间为CD 8+细胞毒性T淋巴细胞提供“帮助”。在这里,我们表明,免疫后,无论是非炎症,非复制抗原或明显的炎症复制抗原,CD 8+细胞毒性T淋巴细胞阻止接收信号,通过CD 27在引发随后表现出一个特定的缺陷,在其能力的二次扩增,可以挽救没有TRAIL。因此,“帮助信息”通过CD 70-CD 27信号传递给CD 8 + T细胞,使它们能够进行二次扩增并避免再刺激时TRAIL介导的凋亡。这些研究结果完成了我们的理解,通过TH是提供给CD 8+细胞毒性T淋巴细胞在引发过程中的细胞相互作用。
CD8 + cytotoxic T lymphocytes are critical components of immunity against infectious pathogens, tumours, and in the case of pathogenic autoimmunity, normal self tissues. CD4 + T (TH) cells provide ‘help’ to CD8 + cytotoxic T lymphocytes during priming by first activating antigen-presenting cells via CD40–CD40L interactions. Here we show that, after immunization with either a noninflammatory, nonreplicating antigen or an overtly inflammatory replicating antigen, CD8 + cytotoxic T lymphocytes prevented from receiving a signal through CD27 during priming subsequently exhibit a specific defect in their capacity for secondary expansion that can be rescued by the absence of TRAIL. Thus, the ‘help message’ is transmitted to CD8 + T cells via CD70–CD27 signals, enabling them to undergo secondary expansion and avoid TRAIL-mediated apoptosis on re-stimulation. These findings complete our understanding of the cellular interactions through which TH is provided to CD8 + cytotoxic T lymphocytes during priming.
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