德克-1通过在喘中通过卡斯帕-11/4介导的巨细胞激增炎症加剧中性粒细胞的炎症
Runjin Cai1,2, Xiaoxiao Gong1,2, Xiaozhao Li3,2
1Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
Respiratory research
|March 8, 2024
概括
德克-1激活通过触发卡斯帕-11/4介导的巨细胞灭和化学激素释放来加剧喘,导致呼吸道炎症增加. 抑制这种途径可以缓解喘模型中的症状.
科学领域:
- 免疫学 免疫学 免疫学
- 呼吸系统医学 呼吸系统医学
- 细胞生物学 细胞生物学
背景情况:
- 模式识别受体Dectin-1对于抗真菌免疫和中性粒细胞炎症至关重要.
- 喘中Dectin-1的过度表达表明它在疾病发病过程中起作用,尽管机制尚不清楚.
- 德克-1与激素灭亡有关,这是一种涉及严重喘的细胞死亡途径,但卡斯帕-11/4的参与仍未得到充分探索.
研究的目的:
- 调查Dectin-1激活在室内灰尘 (HDM) 引起的喘中的作用.
- 为了阐明 caspase-11/4-mediated pyroptosis 在 Dectin-1 驱动的呼吸道炎症中的参与.
- 探索针对喘中的Dectin-1-caspase-11/4轴的治疗策略.
主要方法:
- 采用了一种室内灰尘虫 (HDM) 诱导的喘小鼠模型,用Dectin-1激动剂 (Curdlan) 和caspase-11抑制剂 (wedelolactone) 治疗.
- 通过Westernblotting分析了支气管洗液 (BALF) 中的炎症细胞,并测量了caspase-11和gasdermin D (GSDMD) 的蛋白质表达.
- 在试验室中评估了细胞热和化学激素表达,以及相关的Dectin-1,热因子,以及喘患者中的中性粒细胞.
主要成果:
- 用Curdlan激活Dectin-1,在小鼠中加剧了中性粒细胞呼吸道炎症,而Wedelolactone治疗减轻了这种效应.
- 库德兰/HDM刺激增加了caspase-11激活片段和GSDMD-N释放,以及巨细胞灭 (真空变性退化,LDH释放) 在体外和体内.
- 观察到中性粒细胞化学因子 (CXCL1,CXCL3,CXCL5) 和它们的受体CXCR2的上调,并被wedelolactone抑制.
- 在喘患者的唾液中发现Dectin-1表达在巨细胞,caspase-4和中性粒细胞比例之间存在正相关性.
结论:
- 在喘中激活Dectin-1促进了 caspase-11/4介导的巨细胞灭.
- 这种热会刺激化学激素的分泌,加剧呼吸道中性粒细胞炎症.
- 向Dectin-1和caspase-11/4通路为喘管理提供了一个潜在的治疗策略.
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