Targeted suppression of autoreactive CD8(+) T-cell activation using blocking anti-CD8 antibodies.

Targeted suppression of autoreactive CD8(+) T-cell activation using blocking anti-CD8 antibodies.
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DOI:
10.1038/srep35332
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发表时间:
2016-10-17
期刊:
影响因子:
4.6
通讯作者:
Wooldridge L
Wooldridge L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Clement M;Pearson JA;Gras S;van den Berg HA;Lissina A;Llewellyn-Lacey S;Willis MD;Dockree T;McLaren JE;Ekeruche-Makinde J;Gostick E;Robertson NP;Rossjohn J;Burrows SR;Price DA;Wong FS;Peakman M;Skowera A;Wooldridge L

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CD 8 + T细胞在自身免疫性疾病如多发性硬化症和1型糖尿病的发病机制中发挥作用。然而,靶向整个CD 8 + T细胞群体的药物是不可取的,因为相关的缺乏特异性可能导致不希望的后果,最值得注意的是对感染的易感性增强。在这里,我们表明,自身反应性CD 8 + T细胞是高度依赖于CD 8的配体诱导的活化通过T细胞受体(TCR)。相反,病原体特异性CD 8 + T细胞相对不依赖于CD 8。这些属的差异涉及一种内在的二分法,其根据与同源肽-主要组织相容性复合物I类(pMHCI)的单体相互作用亲和力来分离自体衍生的和外源性抗原特异性TCR。因此,“阻断”抗CD 8抗体可以以相对选择性的方式抑制自身反应性CD 8 + T细胞活化。这些发现为开发和体内评估优先靶向CD 8 + T细胞区室内疾病相关自身免疫反应的新型治疗策略提供了合理的基础。
CD8+ T-cells play a role in the pathogenesis of autoimmune diseases such as multiple sclerosis and type 1 diabetes. However, drugs that target the entire CD8+ T-cell population are not desirable because the associated lack of specificity can lead to unwanted consequences, most notably an enhanced susceptibility to infection. Here, we show that autoreactive CD8+ T-cells are highly dependent on CD8 for ligand-induced activation via the T-cell receptor (TCR). In contrast, pathogen-specific CD8+ T-cells are relatively CD8-independent. These generic differences relate to an intrinsic dichotomy that segregates self-derived and exogenous antigen-specific TCRs according to the monomeric interaction affinity with cognate peptide-major histocompatibility complex class I (pMHCI). As a consequence, “blocking” anti-CD8 antibodies can suppress autoreactive CD8+ T-cell activation in a relatively selective manner. These findings provide a rational basis for the development and in vivo assessment of novel therapeutic strategies that preferentially target disease-relevant autoimmune responses within the CD8+ T-cell compartment.
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