H7N9 virus infection triggers lethal cytokine storm by activating gasdermin E-mediated pyroptosis of lung alveolar epithelial cells.

H7N9 virus infection triggers lethal cytokine storm by activating gasdermin E-mediated pyroptosis of lung alveolar epithelial cells.
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DOI:
10.1093/nsr/nwab137
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发表时间:
2022-01
影响因子:
20.6
通讯作者:
Chen H
Chen H
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wan X;Li J;Wang Y;Yu X;He X;Shi J;Deng G;Zeng X;Tian G;Li Y;Jiang Y;Guan Y;Li C;Shao F;Chen H

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H7N9流感病毒于2013年在中国出现,造成1560多人感染,其中39%是致命的。H7N9患者肺部的“细胞因子风暴”与预后不良和死亡有关;然而,触发细胞因子风暴的潜在机制尚不清楚。在这里,我们发现H7N9病毒在小鼠肺中的有效复制激活了肺泡上皮细胞中的gasdermin E(GSDME)介导的焦亡,然后释放的胞质内容物引发了细胞因子风暴。Gsdme基因敲除可使A549和人原代肺泡上皮细胞在H7N9病毒感染后从焦亡死亡转变为凋亡,Gsdme基因敲除小鼠在H7N9病毒致死感染后存活。我们的研究结果表明,GSDME激活是H7N9病毒感染的肺部细胞因子风暴和致死结果的关键和独特机制,从而为开发抗H7N9病毒的抗病毒药物打开了新的大门。
The H7N9 influenza virus emerged in China in 2013, causing more than 1560 human infections, 39% of which were fatal. A ‘cytokine storm’ in the lungs of H7N9 patients has been linked to a poor prognosis and death; however, the underlying mechanism that triggers the cytokine storm is unknown. Here, we found that efficient replication of the H7N9 virus in mouse lungs activates gasdermin E (GSDME)-mediated pyroptosis in alveolar epithelial cells, and that the released cytosolic contents then trigger a cytokine storm. Knockout of Gsdme switched the manner of death of A549 and human primary alveolar epithelial cells from pyroptosis to apoptosis upon H7N9 virus infection, and Gsdme knockout mice survived H7N9 virus lethal infection. Our findings reveal that GSDME activation is a key and unique mechanism for the pulmonary cytokine storm and lethal outcome of H7N9 virus infection and thus opens a new door for the development of antivirals against the H7N9 virus.
人类感染新型禽源甲型流感 (H7N9) 病毒。
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