Disulfide disruption reverses mucus dysfunction in allergic airway disease.

Disulfide disruption reverses mucus dysfunction in allergic airway disease.
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DOI:
10.1038/s41467-020-20499-0
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发表时间:
2021-01-11
影响因子:
16.6
通讯作者:
Evans CM
Evans CM
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Morgan LE;Jaramillo AM;Shenoy SK;Raclawska D;Emezienna NA;Richardson VL;Hara N;Harder AQ;NeeDell JC;Hennessy CE;El-Batal HM;Magin CM;Grove Villalon DE;Duncan G;Hanes JS;Suk JS;Thornton DJ;Holguin F;Janssen WJ;Thelin WR;Evans CM

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Airway mucus is essential for lung defense, but excessive mucus in asthma obstructs airflow, leading to severe and potentially fatal outcomes. Current asthma treatments have minimal effects on mucus, and the lack of therapeutic options stems from a poor understanding of mucus function and dysfunction at a molecular level and in vivo. Biophysical properties of mucus are controlled by mucin glycoproteins that polymerize covalently via disulfide bonds. Once secreted, mucin glycopolymers can aggregate, form plugs, and block airflow. Here we show that reducing mucin disulfide bonds disrupts mucus in human asthmatics and reverses pathological effects of mucus hypersecretion in a mouse allergic asthma model. In mice, inhaled mucolytic treatment loosens mucus mesh, enhances mucociliary clearance, and abolishes airway hyperreactivity (AHR) to the bronchoprovocative agent methacholine. AHR reversal is directly related to reduced mucus plugging. These findings establish grounds for developing treatments to inhibit effects of mucus hypersecretion in asthma. In asthma, mucus plugging is an important cause of airflow obstruction, but it is not targeted by widely used bronchodilator and anti-inflammatory drugs. Here the authors show that reduction of disulfide bonds that hold mucin polymers together reverses asthma-like obstruction in mice.
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