Host DNA released by NETosis promotes rhinovirus-induced type-2 allergic asthma exacerbation.

Host DNA released by NETosis promotes rhinovirus-induced type-2 allergic asthma exacerbation.
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DOI:
10.1038/nm.4332
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发表时间:
2017-06
期刊:
影响因子:
82.9
通讯作者:
Johnston SL
Johnston SL
中科院分区:
医学1区
文献类型:
--
作者:
Toussaint M;Jackson DJ;Swieboda D;Guedán A;Tsourouktsoglou TD;Ching YM;Radermecker C;Makrinioti H;Aniscenko J;Bartlett NW;Edwards MR;Solari R;Farnir F;Papayannopoulos V;Bureau F;Marichal T;Johnston SL

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呼吸道病毒感染是过敏性哮喘恶化的最常见原因。2型免疫反应的增强与哮喘急性发作密切相关,但病毒感染如何增强2型免疫反应尚不清楚。我们报告了鼻病毒感染后宿主双链DNA(dsDNA)的释放与人类2型过敏性炎症的加重之间的显著相关性。在过敏性气道超敏反应的小鼠模型中,我们发现鼻病毒感染触发了与中性粒细胞胞外陷阱(NETs)形成(NETosis)相关的dsDNA释放。我们进一步证明,通过阻断中性粒细胞弹性蛋白酶或用DNA酶降解NET来抑制NETosis可以保护小鼠免受2型免疫病理学的影响。此外,单独注射小鼠基因组DNA足以概括鼻病毒诱导的2型免疫应答和哮喘病理学的许多特征。因此,NETosis及其相关的细胞外dsDNA有助于发病机制,并可能代表鼻病毒诱导的哮喘急性发作的潜在治疗靶点。
Respiratory viral infections represent the most common cause of allergic asthma exacerbations. Amplification of type 2 immune response is strongly implicated in asthma exacerbation, but how virus infection boosts type 2 responses is poorly understood. We report a significant correlation between release of host double stranded DNA (dsDNA) following rhinovirus infection and exacerbation of type 2 allergic inflammation in humans. In a mouse model of allergic airway hypersensitivity, we show that rhinovirus infection triggers dsDNA release associated with neutrophil extracellular traps (NETs) formation (NETosis). We further demonstrate that inhibiting NETosis by blocking neutrophil elastase, or degrading NETs with DNase protects mice from type 2 immunopathology. Furthermore, injection of mouse genomic DNA alone is sufficient to recapitulate many features of rhinovirus-induced type 2 immune responses and asthma pathology. Thus, NETosis and its associated extracellular dsDNA contribute to the pathogenesis and may represent potential therapeutic targets of rhinovirus-induced asthma exacerbations.
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