雾化德克斯梅托米丁可通过Keap1-Nrf2-ARE通路缓解呼吸机引起的肺损伤中的氧化应激
1Department of Anesthesiology, The Second Affiliated Hospital, Soochow University, Suzhou, China AND Department of Anesthesiology, The Second Affiliated Hospital, Wannan Medical College, Wuhu, China. zhajun_927@163.com.
Iranian journal of allergy, asthma, and immunology
|October 18, 2024
概括
雾化德克斯梅德托米丁 (DEX) 有效地减少了老鼠的肺损伤和炎症. 与静脉注射相比,这种方法显示出优异的结果,突出显示了它在治疗呼吸机诱导的肺损伤 (VILI) 的潜力.
科学领域:
- 肺部医学 肺部医学
- 药理学 药理学是指药理学的学科.
- 毒理学 毒理学 毒理学
背景情况:
- 呼吸机引起的肺损伤 (VILI) 是重症监护中的一个重要并发症.
- 氧化应激和炎症是VILI背后的关键机制.
- 德克斯梅德托米丁 (DEX) 已经显示出缓解VILI的潜力,但其施用途径和机制需要进一步调查.
研究的目的:
- 探索 nebulized dexmedetomidine (DEX) 在改善大鼠VILI诱导的氧化应激的机制.
- 为了比较雾化DEX与静脉注射DEX在治疗VILI中的疗效.
- 调查Keap1-Nrf2-ARE信号通路在DEX介导的保护中对VILI的作用.
主要方法:
- 40只Sprague-Dawley大鼠被分为控制,VILI模型,雾化DEX和静脉注射DEX组.
- 机械通风被应用来诱导VILI.
- 肺组织和血清样本被分析为湿与干的重量比,扩散膜损伤 (DAD) 评分,炎症标志物 (TNF-α,IL-2,IL-6),氧化应激指数 (MDA,SOD),以及Nrf2和Keap1的表达.
- 使用定量实时PCR和西班牙血迹来评估蛋白质和基因表达.
主要成果:
- 雾化和静脉注射的DEX都显著改善了VILI,降低了肺湿干比率和DAD得分.
- 服用DEX降低了炎症标志物 (TNF-α,IL-2,IL-6) 和MDA的水平,同时增加了SOD水平.
- 与静脉注射相比,雾化DEX显示出更明显的改善,通过Keap1-Nrf2-ARE通路显著调节Keap1和Nrf2表达.
结论:
- 德克斯梅德托米丁有效地减轻了VILI诱导的氧化应激和炎症.
- 与静脉注射相比,雾化DEX的使用是减轻VILI的优越途径.
- DEX对VILI的保护作用通过Keap1-Nrf2-ARE信号通路进行介导.
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