外部线索对对流感A感染的时钟驱动保护的影响
Oindrila Paul1, Thomas G Brooks2, Alisha Shetty1
1Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
The Journal of clinical investigation
|November 17, 2025
概括
在流感感染期间破坏光循环会损害免疫反应和保护. 节律性饮食时间可以帮助减轻这些负面影响,突出说明昼夜节律在病毒感染中的重要性.
科学领域:
- 免疫学 免疫学 免疫学
- 时间生物学 时间生物学
- 病毒学 病毒学
背景情况:
- 流感和呼吸道病毒导致显著的死亡率和发病率.
- 昼夜节律调节免疫反应,并提供对流感的临时保护.
- 感染后昼夜节律的作用需要进一步研究.
研究的目的:
- 调查感染后的节律功能是否对抗流感的时间性保护是必要的.
- 为了确定环境循环中断对流感结果的影响.
- 探索感染期间对免疫反应的昼夜影响的机制.
主要方法:
- 鼠被感染了流感病毒,并暴露在被操纵的光暗周期中.
- 在感染后的关键窗口期间,环境照明线索被破坏.
- 分析了免疫细胞群 (单细胞,CD8+ T细胞) 和肺部转录组学.
- 使用时钟突变小鼠和节律性食时间干预措施来评估昼夜钟参与和补偿机制.
主要成果:
- 在关键的感染后窗口中破坏光周期取消了日间特定时间的保护.
- 这种干扰导致免疫反应失调,其特征是肺部炎症单细胞和CD8+ T细胞增加.
- 转录基因分析显示过度炎症.
- 干扰没有影响时钟突变小鼠的结果,证实了宿主的昼夜时钟调节.
- 节奏性饮食时间减轻了光周期中断的不良影响.
结论:
- 环境定时线索,特别是光周期,对于在流感感染期间保持保护性昼夜调节至关重要.
- 扰乱昼夜节律导致免疫失调和恶化的流感结果.
- 外部线索,如餐点时间,可以补偿光周期的中断,这表明多个体内时钟发挥了作用.
- 这些发现强调了病毒病原发生过程中环境时间和内源节律之间的相互作用,并为临床护理提供了见解.
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