NLRP3对于中性粒细胞两极分化和化学反应对白血B4梯度的反应至关重要
Stijn Van Bruggen1,2,3, Pierre-André Jarrot1,2, Eline Thomas4,5
1Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115.
概括
中性粒细胞的招募依赖于NLRP3炎症体,用于适当的细胞极化和定向迁移. 这种炎症组合对引导中性粒细胞到感染和炎症的部位至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 具有天生的免疫力.
背景情况:
- 中性粒细胞的招募对于对感染和炎症的天生的免疫反应至关重要.
- 在中性粒细胞刺激时,NLRP3炎症酶被激活,并在免疫信号传递中发挥作用.
- 之前的研究表明,NLRP3缺乏的小鼠中中性粒细胞的招募减少.
研究的目的:
- 为了调查NLRP3炎症酶缺陷是否会影响中性粒细胞的化学反应.
- 阐明NLRP3炎症酶组合在中性粒细胞迁移动态中的特定作用.
主要方法:
- 在体外化疗测试中,使用leukotriene B4 (LTB4) 梯度与野生类型和NLRP3缺乏的中性粒细胞进行了测试.
- 使用MCC950.0进行NLRP3炎症酶组合的药理抑制.
- 肠道显微镜观察中性粒细胞在体内向激光诱导损伤的迁移.
- 使用诺科达的微管细胞骨破坏.
主要成果:
- 缺乏NLRP3的中性粒细胞表现出细胞极化受损,迁移方向性降低,向LTB4的速度降低.
- 药物抑制NLRP3炎症酶组合降低了方向性,但没有降低整体运动性.
- 微管中断恢复了NLRP3缺乏的中性粒细胞的非定向迁移.
- 在体内显微镜证实了NLRP3缺乏模型中中性粒细胞迁移的减少.
结论:
- NLRP3炎症酶组合对于确定中性粒细胞极性至关重要.
- 这种极性对于引导中性粒细胞的化学转移向炎症刺激至关重要.
- 对于方向迁移而言,NLRP3炎症酶的功能是特别需要的,而不是一般的细胞运动性.
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