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α2β1 Integrin Is Required for Optimal NK Cell Proliferation during Viral Infection but Not for Acquisition of Effector Functions or NK Cell–Mediated Virus Control
The Journal of Immunology ( IF 4.4 ) Pub Date : 2020-02-03 , DOI: 10.4049/jimmunol.1900927
Colby Stotesbury 1 , Pedro Alves-Peixoto 1 , Brian Montoya 1 , Maria Ferez 1 , Savita Nair 1 , Christopher M. Snyder 1 , Shunchuan Zhang 1 , Cory J. Knudson 1 , Luis J. Sigal 1
Affiliation  

Key Points α2β1 deficiency does not alter the balance of NK cell/ILC1 generation. α2β1 deficiency does not alter NK cell maturation. α2β1-deficient NK cells efficiently protect from lethal mousepox and control MCMV. NK cells play an important role in antiviral resistance. The integrin α2, which dimerizes with integrin β1, distinguishes NK cells from innate lymphoid cells 1 and other leukocytes. Despite its use as an NK cell marker, little is known about the role of α2β1 in NK cell biology. In this study, we show that in mice α2β1 deficiency does not alter the balance of NK cell/ innate lymphoid cell 1 generation and slightly decreases the number of NK cells in the bone marrow and spleen without affecting NK cell maturation. NK cells deficient in α2β1 had no impairment at entering or distributing within the draining lymph node of ectromelia virus (ECTV)–infected mice or at becoming effectors but proliferated poorly in response to ECTV and did not increase in numbers following infection with mouse CMV (MCMV). Still, α2β1-deficient NK cells efficiently protected from lethal mousepox and controlled MCMV titers in the spleen. Thus, α2β1 is required for optimal NK cell proliferation but is dispensable for protection against ECTV and MCMV, two well-established models of viral infection in which NK cells are known to be important.

中文翻译:

α2β1 整合素是病毒感染期间最佳 NK 细胞增殖所必需的,但不是获得效应子功能或 NK 细胞介导的病毒控制所必需的

关键点 α2β1 缺乏不会改变 NK 细胞/ILC1 生成的平衡。α2β1 缺乏不会改变 NK 细胞的成熟。α2β1 缺陷型 NK 细胞可有效预防致命鼠痘并控制 MCMV。NK细胞在抗病毒抗性中起重要作用。整合素 α2 与整合素 β1 形成二聚体,将 NK 细胞与先天淋巴细胞 1 和其他白细胞区分开来。尽管它用作 NK 细胞标记物,但对 α2β1 在 NK 细胞生物学中的作用知之甚少。在这项研究中,我们表明,在小鼠中,α2β1 缺乏不会改变 NK 细胞/先天淋巴细胞 1 代的平衡,并且会略微减少骨髓和脾脏中 NK 细胞的数量,而不影响 NK 细胞的成熟。缺乏 α2β1 的 NK 细胞在进入或分布在 ectromelia 病毒 (ECTV) 感染的小鼠的引流淋巴结内或成为效应器方面没有受损,但对 ECTV 的增殖反应很差,并且在感染小鼠 CMV (MCMV) 后数量没有增加)。尽管如此,α2β1 缺陷的 NK 细胞仍能有效地防止致命的鼠痘并控制脾脏中的 MCMV 滴度。因此,α2β1 是最佳 NK 细胞增殖所必需的,但对于防止 ECTV 和 MCMV 是可有可无的,这两种公认的病毒感染模型在其中 NK 细胞很重要。α2β1 缺陷型 NK 细胞可有效防止致命鼠痘并控制脾脏中的 MCMV 滴度。因此,α2β1 是最佳 NK 细胞增殖所必需的,但对于防止 ECTV 和 MCMV 是可有可无的,这两种公认的病毒感染模型在其中 NK 细胞很重要。α2β1 缺陷型 NK 细胞可有效防止致命鼠痘并控制脾脏中的 MCMV 滴度。因此,α2β1 是最佳 NK 细胞增殖所必需的,但对于防止 ECTV 和 MCMV 是不必要的,这两种病毒感染模型众所周知,其中 NK 细胞很重要。
更新日期:2020-02-03
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