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低温可以通过限制IL-1β释放和NETs形成来防止呼吸器诱导的肺损伤
bioRxiv : the preprint server for biology
|April 16, 2025
概括
治疗性低温通过减少IL-1β释放和中性粒细胞细胞外陷 (NETs) 在小鼠机械通风期间的形成来预防急性呼吸衰竭. 这一发现为管理呼吸机引起的肺损伤提供了潜在的新策略.
科学领域:
- 免疫学 免疫学 免疫学
- 生理学 生理学 生理学
- 临界护理医学 临界护理医学
背景情况:
- 机械通风对于急性呼吸困难综合征 (ARDS) 至关重要,但可能导致呼吸器诱导的肺损伤 (VILI).
- 维利涉及介质素-1β (IL-1β) 和中性粒细胞外细胞陷 (NETs),导致低氧化.
- 介素-1受体1 (IL-1R1) 信号传递与VILI期间的NETs形成和低氧症有关.
研究的目的:
- 研究IL-1R1信号传递在LPS-HVV诱导的低氧化和NETs形成中的作用.
- 评估低温症在缓解VILI及其相关炎症反应方面的治疗潜力.
主要方法:
- 使用LPS和高体积通风 (LPS-HVV) 的小鼠模型来诱导VILI.
- 评估IL-1R1缺乏对低氧化和NETs形成的影响.
- 对LPS-HVV小鼠进行治疗性低温 (TH),并测量生理和炎症标志物.
- 在低温条件下检查了IL-1β释放和巨细胞中Gasdermin D (GSDMD) 裂变.
主要成果:
- 在LPS-HVV小鼠中,呈现出低氧化和NETs形成,而在IL-1R1缺乏的小鼠中,这些缺陷减弱了.
- 在LPS-HVV小鼠中,治疗性低温 (32°C) 预防了低氧化,减少了白蛋白泄漏,IL-1β,GSDMD裂变和NETs形成.
- 低温症显著降低了用ATP或尼日里辛刺激的LPS原始化巨细胞中的IL-1β释放和GSDMD裂变.
结论:
- 在LPS-HVV引起的肺损伤中,IL-1R1信号传递对NETs的形成和低氧症至关重要.
- 治疗性低温有效地通过调节NLRP3炎症酶激活,IL-1β释放和NETs形成来缓解急性呼吸衰竭.
- 低温是一种有前途的治疗策略,用于预防或治疗呼吸机引起的肺损伤.
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