NLRP3炎症酶激活调节中性粒细胞外细胞陷的形成,并加剧支气管支气管炎症
Zhao-Ming Chen1, Jia-Hui He1,2, Rui-di Tang1,3
1State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Joint International Research Laboratory of Respiratory Health, Guangdong Basic Research Center of Excellence for Respiratory Medicine, Department of Allergy and Clinical Immunology, Department of Respiratory and Critical Care Medicine, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510163, P. R. China.
核酸结合寡聚化域类受体蛋白3 (NLRP3) 炎症酶激活促进中性粒细胞外细胞陷 (NET) 在支气管切除症中的形成. 这加剧了呼吸道炎症和上皮损伤,突出了NLRP3作为治疗点.
科学领域:
- 肺部医学 肺部医学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 中性质炎症和 Pseudomonas aeruginosa 感染是支气管炎症的关键.
- 在支气管切除症中炎症酶激活和NET形成的机制尚不清楚.
研究的目的:
- 调查NLRP3炎症酶激活在NET形成,上皮炎症和支气管切除中损伤中的作用.
主要方法:
- 在稳定状态和恶化状态下比较的互白素-1β水平.
- 评估LPS诱导的NLRP3炎症酶激活和中性粒细胞中的NET形成.
- 测量了caspase-1p20,DNA-myeloperoxidase和DNA-中性粒细胞弹性酶的表达.
- 评估了LPS和NET对上皮细胞的协同作用.
- 使用了NLRP3抑制剂 (MCC950,Z-VAD-FMK) 和NET形成抑制剂 (GSK484,LDC7559).
主要成果:
- 在恶化期间增加的白内素-1β水平与中性粒细胞计数相关.
- LPS触发了中性细胞NLRP3炎症酶的激活和NET的形成.
- NETs放大了上皮炎症,增加了MUC5AC,并降低了ZO-1和α-tubulin的表达.
- 抑制剂对NLRP3激活和NET形成产生了特定的影响.
结论:
- NLRP3炎症酶激活是支气管切除症中NET形成的关键驱动因素.
- 这一过程加剧了上皮质炎症和损伤.
- 准NLRP3炎症酶激活可能为支气管切除提供治疗策略.
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