畜牧兽医学报 ›› 2023, Vol. 54 ›› Issue (2): 694-705.doi: 10.11843/j.issn.0366-6964.2023.02.026

• 预防兽医 • 上一篇    下一篇

白细胞介素-10对口蹄疫病毒感染小鼠T细胞增殖及其表达TNF-α、IFN-γ和IL-2的影响

郭紫晶1,2, 陈飞2, 张志雄2, 柏玲1,2, 张志东1*, 李彦敏1*   

  1. 1. 西南民族大学畜牧兽医学院, 成都 610041;
    2. 中国农业科学院兰州兽医研究所家畜疫病病原生物学国家重点实验室OIE/国家口蹄疫参考实验室, 兰州 730046
  • 收稿日期:2022-04-07 出版日期:2023-02-23 发布日期:2023-02-21
  • 通讯作者: 张志东,主要从事动物病毒病致病机制研究,E-mail:zhangzhidong@swun.edu.cn;李彦敏,主要从事动物病毒病免疫机制与防控技术研究,E-mail:liyanmin@swun.edu.cn
  • 作者简介:郭紫晶(1992-),女,布依族,贵州安顺人,博士,主要从事动物病毒病致病机制研究,E-mail:657694728@qq.com
  • 基金资助:
    西南民族大学中央高校基本科研业务费专项(2021115);西南民族大学引进高层次人才科研资助金项目(RQD202100);四川省自然科学基金(2022NSFSC0073)

Effects of Interleukin-10 on T Cell Proliferation and Its Expression of TNF-α, IFN-γ and IL-2 in Mice Infected with Foot-and-Mouth Disease Virus

GUO Zijing1,2, CHEN Fei2, ZHANG Zhixiong2, BAI Ling1,2, ZHANG Zhidong1*, LI Yanmin1*   

  1. 1. College of Animal Husbandry and Veterinary Medicine, Southwest Minzu University, Chengdu 610041, China;
    2. OIE/National Foot and Mouth Disease Reference Laboratory, State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
  • Received:2022-04-07 Online:2023-02-23 Published:2023-02-21

摘要: 白细胞介素-10(IL-10)增高是口蹄疫病毒(FMDV)感染过程中显著特征之一。本研究旨在探讨IL-10对FMDV感染小鼠外周血T细胞增殖及其表达效应功能相关细胞因子的影响。采用CCK-8和流式细胞术分别检测小鼠外周血T细胞增殖和T细胞表达效应功能相关细胞因子(TNF-α、IFN-γ和IL-2)。结果显示,与对照小鼠相比,FMDV感染小鼠(感染12、24、36和48 h)外周血T细胞对刀豆蛋白A刺激的增殖均显著下降(P<0.05或P<0.01);FMDV感染小鼠的外周血CD4+T细胞表达TNF-α和IL-2均显著下降(均P<0.01),CD8+T细胞表达TNF-α、IFN-γ和IL-2也显著下降(P<0.01或P<0.000 1)。体内阻断IL-10/IL-10R信号或者敲除IL-10均能显著恢复FMDV感染小鼠外周血T细胞的增殖(P<0.05或P<0.01),但不影响CD4+和CD8+T细胞表达TNF-α、IFN-γ和IL-2。本研究首次揭示FMDV能抑制小鼠外周血T细胞增殖及其表达TNF-α、IFN-γ和IL-2,其有助于FMDV逃避宿主免疫反应。尽管体内阻断IL-10/IL-10R信号或者敲除IL-10不影响CD4+和CD8+T细胞的表达TNF-α、IFN-γ和IL-2,但其有助于恢复外周血T细胞的增殖能力,该结果为FMD新型防控产品的研发提供新的思路。

关键词: 口蹄疫病毒, 白细胞介素-10, T细胞, 细胞增殖, 细胞因子

Abstract: The increase of interleukin-10 (IL-10) is one of the hallmarks during foot-and-mouth disease virus (FMDV) infection. The aim of this study was to investigate the effects of IL-10 on the proliferation and the expressions of function-related cytokines of T cells in peripheral blood of mice infected with FMDV. The proliferation and the expressions of effector function-related cytokines (TNF-α, IFN-γ and IL-2) of T cells in peripheral blood of mice were detected by CCK-8 and flow cytometry, respectively. The results showed that the proliferations of T cells in peripheral blood of FMDV-infected mice at 12, 24, 36 and 48 hpi were significantly decreased compared with that of mock-mice (P<0.05 or P<0.01); and the expressions of TNF-α and IL-2 of CD4+ T cells in peripheral blood of infected mice were significantly decreased compared with that of mock-mice (all P<0.01); and the expressions of TNF-α, IFN-γ and IL-2 of CD8+ T cells in peripheral blood of infected mice were also significantly decreased compared with that of mock-mice (P<0.01 or P<0.000 1). However, blocking IL-10/IL-10R signaling in vivo or knocking out IL-10 contributed to restore the proliferation of T cells in peripheral blood following FMDV infection (P<0.05 or P<0.01), but did not affect the expressions of TNF-α, IFN-γ and IL-2 of CD4+ and CD8+ T cells. The study for the first time revealed that the proliferation and the expressions of TNF-α, IFN-γ and IL-2 of T cells were inhibited after FMDV infection, which contributed to evade immune responses. Although blocking IL-10/IL-10R signaling in vivo or knocking out IL-10 did not affect the expressions of TNF-α, IFN-γ and IL-2 of CD4+ and CD8+ T cells, it contributed to restore the proliferation of T cells in peripheral blood of FMDV-infected mice, providing new perspectives and new strategies for the design of new products for FMD prevention and control.

Key words: foot-and-mouth disease virus, interleukin-10, T cells, proliferation, cytokine

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