Mucus production stimulated by IFN-AhR signaling triggers hypoxia of COVID-19.

Mucus production stimulated by IFN-AhR signaling triggers hypoxia of COVID-19.
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DOI:
10.1038/s41422-020-00435-z
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发表时间:
2020-12
期刊:
影响因子:
44.1
通讯作者:
Huang B
Huang B
中科院分区:
生物学1区
文献类型:
--
作者:
Liu Y;Lv J;Liu J;Li M;Xie J;Lv Q;Deng W;Zhou N;Zhou Y;Song J;Wang P;Qin C;Tong WM;Huang B

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沉默的缺氧已经成为冠状病毒病2019年的一个独特特征(新冠肺炎)。在这项研究中,我们发现粘蛋白积聚在新冠肺炎患者的支气管肺泡灌洗液中,并在感染SARS-CoV-2的小鼠和猕猴的肺部上调。我们发现,无论是干扰素-β还是干扰素-γ,在SARS-CoV-2感染后,都会通过依赖IDO-Kyn的途径激活芳烃受体信号,导致肺泡上皮细胞粘蛋白的转录上调,包括分泌型和膜结合型粘蛋白。因此,累积的肺泡粘液影响血气屏障,从而导致缺氧和肺活量减少,这可以通过阻断AhR活性来逆转。这些发现可能解释了新冠肺炎患者中无症状缺氧的形成,并提出了一种可能的以AhR通路为靶点的干预策略。
Silent hypoxia has emerged as a unique feature of coronavirus disease 2019 (COVID-19). In this study, we show that mucins are accumulated in the bronchoalveolar lavage fluid (BALF) of COVID-19 patients and are upregulated in the lungs of severe respiratory syndrome coronavirus 2 (SARS-CoV-2)-infected mice and macaques. We find that induction of either interferon (IFN)-β or IFN-γ upon SARS-CoV-2 infection results in activation of aryl hydrocarbon receptor (AhR) signaling through an IDO-Kyn-dependent pathway, leading to transcriptional upregulation of the expression of mucins, both the secreted and membrane-bound, in alveolar epithelial cells. Consequently, accumulated alveolar mucus affects the blood-gas barrier, thus inducing hypoxia and diminishing lung capacity, which can be reversed by blocking AhR activity. These findings potentially explain the silent hypoxia formation in COVID-19 patients, and suggest a possible intervention strategy by targeting the AhR pathway.
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