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在对血红蛋白和PAMP的反应中,NLRP12-PANoptosome激活了PANoptosis和病理学
Balamurugan Sundaram1, Nagakannan Pandian1, Raghvendra Mall1
1Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Cell
|June 2, 2023
概括
NLRP12是一种细胞体传感器,可触发炎症和PANoptosome的激活,从而导致细胞死亡和炎症. 删除NLRP12受保护的小鼠,突出其在血液溶解疾病中的作用.
科学领域:
- 免疫学
- 细胞生物学
- 分子医学
背景情况:
- 细胞质的先天免疫传感器,包括炎细胞和PAN光细胞,对于宿主防御和炎症细胞死亡至关重要.
- 传感器NLRP12的触发因子和疾病中的作用在很大程度上是未知的.
- NLRP12与各种传染性和炎症性疾病有关.
研究的目的:
- 为了阐明NLRP12的激活触发器.
- 确定NLRP12在炎症和PANoptosome激活中的作用.
- 研究NLRP12对细胞死亡,炎症和疾病病理学的贡献.
主要方法:
- 通过血红素加病原体相关分子模式 (PAMPs) 或TNF进行NLRP12激活.
- 使用托尔类受体 (TLR) 信号通路,包括TLR2/4和IRF1诱导.
- 检查了炎酶和PANoptosome复合体的形成,细胞因子成熟 (IL-1β,IL-18) 和细胞死亡途径 (caspase-8/RIPK3).
- 使用小鼠血液溶解急性损伤模型评估NLRP12的体内作用.
主要成果:
- NLRP12被确定为一个传感器,驱动炎症和PANoptosome激活作为对血红素加PAMP或TNF的反应.
- TLR2/4信号诱导了IRF1,它对Nlrp12的表达进行了上调,从而启动了炎症组合.
- 炎症酶是较大的NLRP12-PANoptosome复合体的组成部分,通过caspase-8/RIPK3调解炎症细胞死亡.
- 在血液溶解模型中,Nlrp12的删除提供了对急性损伤和致死性的保护.
结论:
- NLRP12 作为血红蛋白加PAMP诱导的PANoptosis,炎症和病理学的关键细胞体传感器.
- NLRP12可以调节炎症酶激活和更大的PANoptosome复合体.
- NLRP12及其相关途径分子是血液溶解和炎症疾病的潜在治疗点.
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