PNAS:生物钟影响人体病毒抵抗力

2016-08-24 张章 中国科学报


  

近日刊登于美国《国家科学院院刊》上的一项新研究显示,病毒感染的时机与宿主昼夜节律的关系可能会影响疾病的进程。人体在一天中不同时段对病毒感染的抵抗力会出现较大变化,这主要是因为人的生物钟会影响病毒复制以及扩散的能力。

生物钟是生物体内的一种无形的“时钟”,主要指生物体生命活动的内在节律性,它调节着人体多项生理功能,包括睡眠规律、体温、免疫系统以及激素分泌等。干扰一种生物的生物钟可能影响其免疫应答,但人们对宿主生物钟对病毒感染进程的影响仍然不清楚。

英国剑桥大学Akhilesh Reddy及其同事在一天的不同时间用疱疹病毒感染了小鼠以及小鼠成纤维细胞。结果发现,如果小鼠在早上感染了病毒,它们体内的病毒复制程度10倍于那些当天10小时后才感染的小鼠。研究人员随后移除了小鼠的时钟基因Bmal1基因,结果疱疹感染增加,还增加了小鼠成纤维细胞的A型流感病毒感染。而且,不论小鼠在一天中哪个时段感染病毒,病毒复制都处在非常高的水平,这显示了生物钟在其中具有的影响力。

作者表示,如果破坏细胞中的生物钟,就会增加疱疹病毒和甲型流感病毒的感染程度。因此在一天中不同时段感染病毒会给人体的相关抵抗力带来很大影响,在“错误的时间”感染病毒会导致病情较为严重。

他们指出,这些发现提示节律周期的干扰可能影响病毒感染的严重性,而且可能代表了一种调控病毒在宿主体内复制的潜在工具。

原始出处

Rachel S. Edgara, Alessandra Stangherlina, Andras D. Nagya,b, Michael P. Nicollc,1, Stacey Efstathiouc,1, John S. O’Neilla,2, and Akhilesh B. Reddya,3.Cell autonomous regulation of herpes and influenza virus infection by the circadian clock.PNAS.2016

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    2017-05-16 drwjr
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    2016-08-25 1dd8a7c5m95(暂无匿称)

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    2016-08-25 1dd8a7c5m95(暂无匿称)

    学习了,赞一个!!

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    2016-08-25 1dd8a7c5m95(暂无匿称)

    学习了,赞一个!!

    0

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    2016-08-25 刘煜

    学习新知识。谢谢。

    0

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