通过ADAP诱导PDPNhi巨细胞子集的分子控制,作为败血症中的宿主防御
Pengchao Zhang1, Xinning Wang1, Xiaodong Yang2
1MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Suzhou Medical College of Soochow University, Soochow University, Suzhou, Jiangsu Province, China.
JCI insight
|February 4, 2025
概括
粘附和脱粒促进适应蛋白 (ADAP) 在败血症期间调节巨细胞的波多普拉宁 (PDPN) 表达. 通过ADAP介导的PDPN上调增强了巨细胞的功能,并防止了败血症的严重程度.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 巨的波多普拉宁 (PDPN) 表达在败血症中至关重要,但其由托尔样受体4 (TLR4) 的调节和对巨功能的影响尚不清楚.
- 了解PDPN监管是开发新型败血症治疗的关键.
研究的目的:
- 为了阐明TLR4刺激的PDPN在巨细胞上调调节的调节机制.
- 研究PDPN表达在巨细胞功能和败血症结局中的作用.
主要方法:
- 使用了体外和体内败血症模型,包括ADAP缺乏和野生类型 (WT) 的小鼠.
- 采用巨细胞刺激试验,基因操纵 (ADAP缺乏) 和药理干预措施.
- 研究的信号通路包括布鲁顿氨酸激酶 (BTK),mTOR和STAT3.
主要成果:
- 在TLR4刺激的巨细胞中,PDPN的上调需要粘附和降粒促进适应蛋白 (ADAP).
- 缺乏ADAP会导致PDPN的表达减少,并加剧败血症的严重程度.
- 一个独特的PDPN高 (PDPNhi) 腹膜巨细胞子集与M2类表型和增强的细胞活性在WT中产生,但不是ADAP缺乏的小鼠.
- 通过BTK介导的ADAP酸化,与mTOR结合,激活STAT3,导致PDPN促进体的交易激活.
- STAT3激活增强了PDPNhi巨细胞的产生,并减轻了败血症的严重程度.
结论:
- 在败血症期间,ADAP是TLR4诱导的巨细胞中PDPN表达的关键调节者.
- 通过ADAP介导的PDPN上调会重置巨细胞的功能,增强对败血症的先天免疫防御.
- 准ADAP-STAT3通路为败血症提供了一个潜在的治疗策略.
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