血小板激活因子和蛋白酶激活受体2合作,通过核因子-kappa B的交换激活促进中性粒细胞的招募和肺炎
Irismara Sousa Silva1, Aline D Almeida1, Antônio C M Lima Filho2
1Laboratory of Inflammation and Proteases, Department of Pharmacology, Institute of Biological Sciences (ICB), Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil.
Scientific reports
|December 7, 2023
概括
这项研究揭示了血小板激活受体 (PAFR) 和蛋白酶激活受体2 (PAR2) 在驱动肺炎和中性粒细胞招募方面的关键合作. 阻断PAR2显著降低了肺部的炎症反应.
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
- 药理学 药理学是指药理学的学科.
背景情况:
- 血小板激活受体 (PAFR) 和蛋白酶激活受体2 (PAR2) 与肺部和呼吸道炎症疾病有关.
- 在肺炎中PAR2和PAFR的合作作用仍然未被探索.
- 了解这种相互作用对于开发针对性治疗炎症性肺部疾病至关重要.
研究的目的:
- 研究PAR2在PAF诱导的肺炎和中性粒细胞招募中的作用.
- 在肺炎的背景下阐明PAFR和PAR2之间的合作机制.
- 评估PAR2对抗对炎症介质和细胞信号通路的影响.
主要方法:
- 在挑战之前,BALB/c小鼠接受了PAR2抗剂 (ENMD1068) 或PAFR抗剂 (WEB2086) 的治疗,然后接受了卡巴米尔-PAF (C-PAF) 或PAR2抗剂 (PAR2-AP) 的治疗.
- 评估了白细胞透,化学激素水平 (CXCL1,CXCL2),骨髓氧化酶 (MPO) 和N-乙糖氨基酶 (NAG) 在支气管支气管洗液 (BALF) 中.
- 在RAW 264.7巨细胞中研究了细胞内信号传递,PAFR/PAR2相互作用和NF-κB激活.
主要成果:
- 用ENMD1068阻断PAR2阻断抑制了C-PAF诱导的中性粒细胞招募,肺炎和媒介体的产生.
- 与WEB2086的PAFR对抗作用也减少了PAR2-AP诱导的中性粒细胞招募.
- PAR2阻塞损害了C-PAF诱导的信号传递和巨细胞中的NF-κB p65转位,表明存在功能合作.
结论:
- 这项研究提供了第一个证据,证明PAFR和PAR2在调解肺炎中的功能合作.
- PAFR和PAR2之间的相互作用对于中性粒细胞的招募和肺部巨细胞的激活至关重要.
- 向PAR2代表了涉及PAFR信号的炎症性肺病的潜在治疗策略.
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