通过中性粒细胞外陷激活TLR9/NF-κB介导的树突细胞驱动实验性脑疟疾的发病
Shijie Yao1, Yan Zhao1, Chao Yao1
1Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang City, Liaoning Province, 110122, P.R. China.
Journal of neuroinflammation
|August 26, 2025
概括
中性细胞细胞外陷 (NETs) 触发TLR9依赖的树突细胞激活,导致大脑疟疾 (CM) 的致病性CD8+T细胞反应. 抑制NET是一种潜在的CM治疗策略.
科学领域:
- 免疫学
- 病理学
- 分子生物学
背景情况:
- 大脑疟疾 (CM) 是Plasmodium falciparum感染的严重并发症,导致严重的死亡率.
- 控制早期的炎症反应对于预防CM相关死亡至关重要.
研究的目的:
- 研究中性粒细胞和中性粒细胞外陷 (NETs) 在脑疟疾 (CM) 免疫病变的作用.
- 阐明中性粒细胞诱导的炎症和T细胞激活的分子机制.
主要方法:
- 使用由Plasmodium berghei ANKA (PbA) 感染引起的CM的小鼠模型.
- 使用中性粒细胞枯竭,流细胞测量和用NET刺激骨髓衍生的树突细胞 (BMDC).
- 研究了托尔类受体9 (TLR9) 和NF-κB信号通路的参与.
主要成果:
- 在PbA感染中,中性粒细胞的调动速度很快;中性粒细胞的减少保护了小鼠免受神经病变的影响.
- NETs通过TLR9/NF-κB信号激活树突细胞 (DCs),促进CD8+T细胞的激活.
- 使用Sivelestat抑制NET可以改善CM的发病和进展.
结论:
- 中性细胞细胞外陷 (NETs) 驱动TLR9依赖的DC激活和CM中的致病性CD8+T细胞反应.
- NETs-TLR9/NF-κB-DC-CD8+ T细胞轴代表了CM免疫病理学的新机制.
- 针对NET形成可能是脑疟疾的潜在治疗策略.
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