BMAL1 links the circadian clock to viral airway pathology and asthma phenotypes.

BMAL1 links the circadian clock to viral airway pathology and asthma phenotypes.
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DOI:
10.1038/mi.2017.24
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发表时间:
2018-01
期刊:
影响因子:
8
通讯作者:
Haspel JA
Haspel JA
中科院分区:
医学1区
文献类型:
--
作者:
Ehlers A;Xie W;Agapov E;Brown S;Steinberg D;Tidwell R;Sajol G;Schutz R;Weaver R;Yu H;Castro M;Bacharier LB;Wang X;Holtzman MJ;Haspel JA

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哮喘患者的症状会有昼夜节律变化。然而,目前尚不清楚这种常见的呼吸道疾病的具体方面与时钟基因的关系,时钟基因对哺乳动物昼夜节律的产生至关重要。在这里,我们使用了一个急性和慢性呼吸道疾病的病毒模型来研究生物钟紊乱如何影响哮喘的肺表型。核心时钟基因BMal1的缺失或时差造成的昼夜节律功能的环境破坏加剧了由仙台病毒(SeV)和甲型流感病毒(IAV)引起的小鼠急性病毒性毛细支气管炎。出生后BMal1的缺失足以引发SeV易感性增加,并与病毒复制控制受损相关。重要的是,BMAL1−/−小鼠在感染后出现了更广泛的哮喘样呼吸道变化,包括粘液产生和呼吸道阻力增加。在来自两个哮喘队列的人类呼吸道样本中,我们观察到多个时钟基因的表达模式发生了变化。我们的结果表明,BMal1通过调节肺对常见哮喘病毒诱因的抗病毒反应,在哮喘呼吸道疾病的发生发展中发挥作用。
Patients with asthma experience circadian variations in their symptoms. However it remains unclear how specific aspects of this common airway disease relate to clock genes, which are critical to the generation of circadian rhythms in mammals. Here, we used a viral model of acute and chronic airway disease to examine how circadian clock disruption affects asthmatic lung phenotypes. Deletion of the core clock gene bmal1 or environmental disruption of circadian function by jet-lag exacerbated acute viral bronchiolitis caused by Sendai virus (SeV) and influenza A virus (IAV) in mice. Post-natal deletion of bmal1 was sufficient to trigger increased SeV susceptibility and correlated with impaired control of viral replication. Importantly, bmal1−/− mice developed much more extensive asthma-like airway changes post-infection, including mucus production and increased airway resistance. In human airway samples from two asthma cohorts, we observed altered expression patterns of multiple clock genes. Our results suggest a role for bmal1 in the development of asthmatic airway disease via the regulation of lung antiviral responses to common viral triggers of asthma.
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