SARS-CoV-2包膜蛋白损害了呼吸道上皮质屏障功能,并通过增加细胞内Cl-度加剧呼吸道炎症
Jian-Bang Xu1, Wei-Jie Guan2,3,4, Yi-Lin Zhang5,6
1State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Department of Respiratory and Critical Care Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, P. R. China.
Signal transduction and targeted therapy
|March 26, 2024
概括
SARS-CoV-2 E 蛋白质会损害气道上皮屏障,并通过破坏化物运输来加剧炎症. 阻止SGK1或PDE4可以减少这种E蛋白诱导的炎症.
科学领域:
- 肺部医学 肺部医学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 感染会损害呼吸道上皮质屏障的功能,并引起炎症.
- SARS-CoV-2包膜 (E) 蛋白质是关键的毒性因子,但其在呼吸道病理学中的具体作用尚不清楚.
- 病原体可以破坏表皮屏障的完整性,并调节炎症信号通路.
研究的目的:
- 阐明SARS-CoV-2 E蛋白对呼吸道上皮质屏障功能的病理影响.
- 研究E蛋白对化物 (Cl-) 运输和炎症反应的影响.
- 为了确定E蛋白诱导的气道炎症背后的分子机制.
主要方法:
- 评估了气道上皮细胞中紧密结合蛋白的表达.
- 研究了托尔类受体 (TLR) 2/4和c-Jun N-终端激酶 (JNK) 信号通路的激活.
- 测量了细胞内化物度 ([Cl-]i) 和血清/糖皮质体调节激酶1 (SGK1) 酸化.
- 评估了阻断SGK1或4D化酶 (PDE4) 对炎症的影响.
主要成果:
- SARS-CoV-2 E 蛋白降低了紧密的结节蛋白质的调节,破坏了呼吸道上皮质屏障.
- E蛋白激活了TLR 2/4和JNK信号,通过上调的PDE4D增加了细胞内Cl-度.
- 升高的[Cl-]i促进了SGK1酸化,导致呼吸道炎症的增加.
- 阻止SGK1或PDE4改善了E蛋白诱导的炎症反应.
结论:
- SARS-CoV-2 E 蛋白质破坏了空气道上皮质屏障的完整性.
- 通过PDE4D和SGK1.1,E蛋白通过增加细胞内化物度来加剧呼吸道炎症.
- 准PDE4或SGK1可能代表对抗SARS-CoV-2引起的呼吸道炎症的治疗策略.
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