过氧化物通过Nrf2激活和ferroptosis抑制减轻败血症引起的急性肺损伤
Kuida Chen1, Shipeng Lu1, Ke Shi2
1State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing 210023, China.
International immunopharmacology
|December 10, 2024
概括
过氧化物是一种传统的中医药化合物,通过激活Nrf2通路并抑制铁亡,可以防止败血症引起的急性肺损伤 (ALI). 这种机制突出显示了超氧化物.
科学领域:
- 药理学 药理学是指药理学的学科.
- 细胞生物学 细胞生物学
- 传统中国医药 传统中国医药
背景情况:
- 败血症引起的急性肺损伤 (ALI) 在ICU中呈现出显著的发病率和死亡率.
- 传统中医药 (TCM) 化合物显示出治疗性承诺,治疗败血症引起的ALI.
- 超氧化物是一种TCM衍生的化合物,具有抗炎和抗氧化特性,但其在ALI中的机制尚不清楚.
研究的目的:
- 阐明超氧化物对败血症诱导的ALI的保护作用的潜在机制.
- 为了研究超氧化物在调节ALI炎症,铁积累和铁症中的作用.
- 确定Nrf2信号通路在超酸的治疗作用中的参与.
主要方法:
- 使用了一种由败血症诱导的ALI的小鼠模型,由结和穿孔 (CLP) 诱导.
- 使用脂聚糖 (LPS) 刺激的MLE-12细胞研究细胞机制.
- 研究过氧化物与Keap1的结合亲和力及其对Nrf2转位和下游基因表达的影响.
- 评估了Nrf2沉默和抑制对超酸的保护作用的影响.
主要成果:
- 在ALI模型中,过氧化物预处理显著降低了肺炎,铁积累和脂质过氧化.
- 过氧化物优先结合Keap1在特定位置 (Arg380,Arg415),抑制Nrf2降解并促进核转位.
- 在超氧化物治疗后观察到抗费洛症基因表达的升级.
- 沉默或抑制Nrf2消除了超酸的保护作用,证实了Nrf2的关键作用.
结论:
- 过氧化物通过Nrf2-介导的信号通路抑制铁亡,对败血症诱导的ALI产生保护作用.
- 过氧化物通过破坏Keap1/Nrf2相互作用而作为Nrf2激活剂.
- 这项研究提供了对hyperoside对ALI的治疗潜力的机制性见解.
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