Migration-induced cell shattering due to DOCK8 deficiency causes a type 2-biased helper T cell response.

Migration-induced cell shattering due to DOCK8 deficiency causes a type 2-biased helper T cell response.
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DOI:
10.1038/s41590-020-0795-1
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发表时间:
2020-12
期刊:
影响因子:
30.5
通讯作者:
Mandl, Judith N.
Mandl, Judith N.
中科院分区:
医学1区
文献类型:
--
作者:
Schneider, Caitlin;Shen, Connie;Gopal, Angelica A.;Douglas, Todd;Forestell, Benjamin;Kauffman, Keith D.;Rogers, Dakota;Artusa, Patricio;Zhang, Qian;Jing, Huie;Freeman, Alexandra F.;Barber, Daniel L.;King, Irah L.;Saleh, Maya;Wiseman, Paul W.;Su, Helen C.;Mandl, Judith N.

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影响免疫细胞迁移并导致免疫缺陷的突变说明了细胞运动在宿主防御中的重要性。在人类中,DOCK 8(一种参与造血细胞迁移的鸟嘌呤交换因子)的功能缺失突变导致免疫缺陷,矛盾的是,导致过敏性疾病。在这里,我们证明,与人类一样,Dock 8 −/−小鼠在肺部感染新型隐球菌和其他非Th 2刺激物后具有深刻的2型CD 4 + T辅助细胞(Th 2)偏好。我们发现,招募的Dock 8 −/− CX 3CR 1+单核吞噬细胞对迁移诱导的细胞破碎非常敏感,释放IL-1β,驱动CD 4 + T细胞产生GM-CSF。阻断IL-1β、GM-CSF或半胱天冬酶活化消除了缺乏DOCK 8的小鼠中的2型偏斜。重要的是,用凋亡细胞治疗感染的野生型小鼠显著增加了GM-CSF的产生和Th 2分化。这揭示了细胞死亡在感染期间驱动2型信号中的重要作用,这可能对理解过敏性疾病中2型CD 4 + T细胞应答的病因学具有意义。
Mutations that impact immune cell migration and result in immune deficiency illustrate the importance of cell movement in host defense. In humans, loss-of-function mutations in DOCK8, a guanine exchange factor involved in hematopoietic cell migration, leads to immunodeficiency and, paradoxically, allergic disease. Here, we demonstrate that, like humans, Dock8−/− mice have a profound type-2 CD4+ T helper cell (Th2) bias upon pulmonary infection with Cryptococcus neoformans and other non-Th2 stimuli. We found that recruited Dock8−/− CX3CR1+ mononuclear phagocytes are exquisitely sensitive to migration-induced cell shattering, releasing IL-1β that drives GM-CSF production by CD4+ T cells. Blocking IL-1β, GM-CSF, or caspase activation eliminated the type-2 skew in mice lacking DOCK8. Importantly, treatment of infected wild-type mice with apoptotic cells significantly increased GM-CSF production and Th2 differentiation. This reveals an important role for cell death in driving type-2 signals during infection, which may have implications for understanding the etiology of type-2 CD4+ T cell responses in allergic disease.
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