KCNJ2是驱动变应性气道炎症与重塑所必需的NLRP3炎症小体活化过程中的关键分子
2026/04/28
摘要
气道炎症与重塑是哮喘发病机制的核心特征。全基因组关联研究表明，内向整流钾通道家族成员 KCNJ2 的多个单核苷酸多态性与哮喘患者密切相关。然而，KCNJ2在哮喘气道炎症与重塑中的具体作用尚不明确。本研究发现，Kcnj2 是气道上皮炎症与重塑的重要调控因子。在哮喘患者的气道上皮中，KCNJ2表达显著下调，且此变化与杯状细胞化生及黏液过度分泌相关。在哮喘模型小鼠中，上皮细胞特异性敲除 Kcnj2 可减轻气道炎症、Th2型炎症反应、杯状细胞化生及黏液过度分泌。在培养的哮喘患者原代气道上皮细胞中，抑制KCNJ2同样可阻碍杯状细胞化生、黏液产生及肺上皮源性警报素的表达。该过程的机制至少部分通过限制内流Ca2+内流和外排K+外排进而抑制NLRP3炎症小体活化所介导，因为药物激活NLRP3可削弱由KCNJ2抑制所改善的气道表型。上述结果揭示了KCNJ2在哮喘状态下气道炎症与重塑中的关键作用。
KCNJ2 is Required for NLRP3 Inflammasome Activation That Drives Allergic Airway Inflammation and Remodeling.
Yachao, Cui; Shumei, Wu; Yang, Peng;
Abstrast
Airway inflammation and remodeling are cardinal features of asthma pathogenesis. Genome-wide association studies have shown that several SNPs of KCNJ2, a member of the inwardly rectifying potassium channel family, are associated with asthma in patients. However, the role of KCNJ2 in airway inflammation and remodeling in asthma remains unknown. Here, we demonstrate that the Kcnj2 serves as a critical regulator of airway epithelial inflammation and remodeling. KCNJ2 expression is significantly reduced in the airway epithelium of asthmatic patients, which is associated with goblet cell metaplasia and mucus overproduction. Epithelial cell depletion of Kcnj2 attenuates airway inflammation, Th2 inflammatory response, goblet cell metaplasia, and mucus overproduction in the airways of asthmatic mice. In cultured primary airway epithelial cells of asthmatic patients, KCNJ2 inhibition also hampers goblet cell metaplasia, mucus production, and lung epithelial cell-derived alarmins expression. This process appears to be mediated, at least in part, through inhibition of NLRP3 by restricting Ca(2+) influx and K(+) efflux, as pharmacological activation of NLRP3 diminishes the KCNJ2 inhibition-ameliorated airway phenotypes. These results provide insight into the role of Kcnj2 in airway inflammation and remodeling in asthmatic conditions.
气道炎症与重塑是哮喘发病机制的核心特征。全基因组关联研究表明，内向整流钾通道家族成员 KCNJ2 的多个单核苷酸多态性与哮喘患者密切相关。然而，KCNJ2在哮喘气道炎症与重塑中的具体作用尚不明确。本研究发现，Kcnj2 是气道上皮炎症与重塑的重要调控因子。在哮喘患者的气道上皮中，KCNJ2表达显著下调，且此变化与杯状细胞化生及黏液过度分泌相关。在哮喘模型小鼠中，上皮细胞特异性敲除 Kcnj2 可减轻气道炎症、Th2型炎症反应、杯状细胞化生及黏液过度分泌。在培养的哮喘患者原代气道上皮细胞中，抑制KCNJ2同样可阻碍杯状细胞化生、黏液产生及肺上皮源性警报素的表达。该过程的机制至少部分通过限制内流Ca2+内流和外排K+外排进而抑制NLRP3炎症小体活化所介导，因为药物激活NLRP3可削弱由KCNJ2抑制所改善的气道表型。上述结果揭示了KCNJ2在哮喘状态下气道炎症与重塑中的关键作用。
（中日友好医院呼吸与危重症医学科 万静萱 摘译 林江涛 审校）
（Adv Sci (Weinh) 2026 Apr 10;(0):e17666. DOI：10.1002/advs.202517666. IF: 15.84）
（Adv Sci (Weinh) 2026 Apr 10;(0):e17666. DOI：10.1002/advs.202517666. IF: 15.84）
KCNJ2 is Required for NLRP3 Inflammasome Activation That Drives Allergic Airway Inflammation and Remodeling.
Yachao, Cui; Shumei, Wu; Yang, Peng;
Abstrast
Airway inflammation and remodeling are cardinal features of asthma pathogenesis. Genome-wide association studies have shown that several SNPs of KCNJ2, a member of the inwardly rectifying potassium channel family, are associated with asthma in patients. However, the role of KCNJ2 in airway inflammation and remodeling in asthma remains unknown. Here, we demonstrate that the Kcnj2 serves as a critical regulator of airway epithelial inflammation and remodeling. KCNJ2 expression is significantly reduced in the airway epithelium of asthmatic patients, which is associated with goblet cell metaplasia and mucus overproduction. Epithelial cell depletion of Kcnj2 attenuates airway inflammation, Th2 inflammatory response, goblet cell metaplasia, and mucus overproduction in the airways of asthmatic mice. In cultured primary airway epithelial cells of asthmatic patients, KCNJ2 inhibition also hampers goblet cell metaplasia, mucus production, and lung epithelial cell-derived alarmins expression. This process appears to be mediated, at least in part, through inhibition of NLRP3 by restricting Ca(2+) influx and K(+) efflux, as pharmacological activation of NLRP3 diminishes the KCNJ2 inhibition-ameliorated airway phenotypes. These results provide insight into the role of Kcnj2 in airway inflammation and remodeling in asthmatic conditions.
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