Differential control of CD4(+) T-cell subsets by the PD-1/PD-L1 axis in a mouse model of allergic asthma.

Differential control of CD4(+) T-cell subsets by the PD-1/PD-L1 axis in a mouse model of allergic asthma.
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DOI:
10.1002/eji.201444778
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发表时间:
2015-04
影响因子:
5.4
通讯作者:
Lewkowich, Ian P.
Lewkowich, Ian P.
中科院分区:
医学3区
文献类型:
--
作者:
McAlees, Jaclyn W.;Lajoie, Stephane;Dienger, Krista;Sproles, Alyssa A.;Richgels, Phoebe K.;Yang, Yanfen;Khodoun, Marat;Azuma, Miyuki;Yagita, Hideo;Fulkerson, Patricia C.;Wills-Karp, Marsha;Lewkowich, Ian P.

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检验 PD-1 家族成员在过敏性哮喘中的作用的研究得出了相互矛盾的结果。使用过敏性哮喘小鼠模型,我们发现阻断 PD-1/PD-L1 对不同的 CD4+ T 细胞亚群有不同的影响。 PD-1/PD-L1 阻断不是通过改变潜在 Th2 免疫反应的强度来增强 AHR,而是通过允许伴随的 Th17 免疫反应的发展。支持 CD4+ T 细胞对 PD-1 介导的抑制作用的差异性反应,初始 PD-1−/− 小鼠表现出 Th1 和 Th17 水平升高,但 Th2 细胞因子水平降低,PD-1 连接限制了体外极化 Th1 和 Th17 细胞的细胞因子产生,但略微增强了体外极化 Th2 细胞的细胞因子产生,PD-1 连接增强了非极化条件下培养的初始 T 细胞的 Th2 细胞因子产生。这些数据表明,不同的 CD4+ T 细胞亚群对 PD-1 连接的反应不同,并且可以解释 PD-1 家族成员在控制过敏性哮喘中观察到的一些可变结果。由于 PD-1/PD-L1 轴通过限制 Th17 细胞活性来限制哮喘严重程度,这表明严重过敏性哮喘可能与某些个体的 PD-1/PD-L1 调节轴缺陷有关。
Studies examining the role of PD-1 family members in allergic asthma have yielded conflicting results. Using a mouse model of allergic asthma, we find that blockade of PD-1/PD-L1 has distinct influences on different CD4+ T cell subsets. PD-1/PD-L1 blockade enhances AHR not by altering the magnitude of the underlying Th2 immune response, but by allowing the development of a concomitant Th17 immune response. Supporting differential CD4+ T cell responsiveness to PD-1-mediated inhibition, naïve PD-1−/− mice displayed elevated Th1 and Th17 levels, but diminished Th2 cytokine levels, ligation of PD-1 limited cytokine production by in vitro-polarized Th1 and Th17 cells, but slightly enhanced cytokine production by in vitro-polarized Th2 cells, and PD-1 ligation enhanced Th2 cytokine production by naïve T cells cultured under non-polarizing conditions. These data demonstrate that different CD4+ T cell subsets respond differentially to PD-1 ligation and may explain some of the variable results observed in control of allergic asthma by the PD-1 family members. As the PD-1/PD-L1 axis limits asthma severity by constraining Th17 cell activity, this suggests that severe allergic asthma may be associated with a defective PD-1/PD-L1 regulatory axis in some individuals.
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