上睑下垂
炎症体
鼻息肉
促炎细胞因子
医学
MAPK/ERK通路
前列腺素E2受体
糖皮质激素受体
免疫学
信号转导
细胞生物学
炎症
生物
受体
癌症研究
糖皮质激素
内科学
兴奋剂
作者
Yue Li,Lihong Chang,Weiqiang Huang,Hongwei Bao,Xia Li,Xiaohong Chen,Haotian Wu,Zhouzhou Yao,Zizhen Huang,Samuel E. Weinberg,Deyu Fang,Yana Zhang,Gehua Zhang
标识
DOI:10.1016/j.jaci.2022.02.031
摘要
BackgroundPyroptosis is closely related to inflammation. However, the molecular mechanisms and pathologic contributions of pyroptotic epithelial cell are not yet fully understood.ObjectiveThis study aimed to explore the function and molecular mechanisms of IL-17A on human nasal epithelial cell (hNEC) pyroptosis.MethodsThe expression of pyroptosis-related biomarkers and IL-17A was assessed in sinonasal mucosa from control individuals, patients with chronic rhinosinusitis without nasal polyps, and patients with chronic rhinosinusitis with nasal polyps (CRSwNP) by using quantitative RT-PCR. Their localization was analyzed via immunohistochemistry and immunofluorescence. The ultrastructural characteristics of IL-17A–induced pyroptosis in hNECs were visualized by using electron microscopy. IL-17A functional assays were performed on hNECs and airway epithelial cell lines. Cytokine levels were quantified via ELISA. The signaling pathways involved in IL-17A–induced pyroptosis were studied via unbiased RNA sequencing and Western blotting.ResultsThe expression of IL-17A and the pyroptotic biomarkers NOD-like receptor family, pyrin domain containing 3 (NLRP3), caspase-1, gasdermin D, and IL-1β was increased in nasal mucosa from patients with CRSwNP compared with in those with chronic rhinosinusitis without nasal polyps and the control subjects. IL-17A was positively correlated and colocalized with the pyroptotic biomarkers. IL-17A treatment induced pyroptosis in the hNECs and cell lines analyzed, primarily through the extracellular signal–regulated kinase (ERK)-NLRP3/caspase-1 signaling pathway, and increased IL-1β and IL-18 secretion in hNECs. Moreover, IL-17A–induced pyroptosis contributed to steroid resistance by affecting glucocorticoid receptor-α and glucocorticoid receptor-β expression, and the inhibition of pyroptotic proteins partially abolished IL-17A–induced steroid resistance in hNECs.ConclusionElevated IL-17A level promotes pyroptosis in hNECs through the ERK-NLRP3/caspase-1 signaling pathway and contributes to glucocorticoid resistance by affecting glucocorticoid receptor homeostasis in patients with CRSwNP. Pyroptosis is closely related to inflammation. However, the molecular mechanisms and pathologic contributions of pyroptotic epithelial cell are not yet fully understood. This study aimed to explore the function and molecular mechanisms of IL-17A on human nasal epithelial cell (hNEC) pyroptosis. The expression of pyroptosis-related biomarkers and IL-17A was assessed in sinonasal mucosa from control individuals, patients with chronic rhinosinusitis without nasal polyps, and patients with chronic rhinosinusitis with nasal polyps (CRSwNP) by using quantitative RT-PCR. Their localization was analyzed via immunohistochemistry and immunofluorescence. The ultrastructural characteristics of IL-17A–induced pyroptosis in hNECs were visualized by using electron microscopy. IL-17A functional assays were performed on hNECs and airway epithelial cell lines. Cytokine levels were quantified via ELISA. The signaling pathways involved in IL-17A–induced pyroptosis were studied via unbiased RNA sequencing and Western blotting. The expression of IL-17A and the pyroptotic biomarkers NOD-like receptor family, pyrin domain containing 3 (NLRP3), caspase-1, gasdermin D, and IL-1β was increased in nasal mucosa from patients with CRSwNP compared with in those with chronic rhinosinusitis without nasal polyps and the control subjects. IL-17A was positively correlated and colocalized with the pyroptotic biomarkers. IL-17A treatment induced pyroptosis in the hNECs and cell lines analyzed, primarily through the extracellular signal–regulated kinase (ERK)-NLRP3/caspase-1 signaling pathway, and increased IL-1β and IL-18 secretion in hNECs. Moreover, IL-17A–induced pyroptosis contributed to steroid resistance by affecting glucocorticoid receptor-α and glucocorticoid receptor-β expression, and the inhibition of pyroptotic proteins partially abolished IL-17A–induced steroid resistance in hNECs. Elevated IL-17A level promotes pyroptosis in hNECs through the ERK-NLRP3/caspase-1 signaling pathway and contributes to glucocorticoid resistance by affecting glucocorticoid receptor homeostasis in patients with CRSwNP.
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