阿卡西通过上调SIRT1/NF-κB通路来预防急性肺损伤
Lanxin Gu1, Yue Yin2, Manling Liu2
1Yale School of Public Health, New Haven, CT, 06510, United States.
Heliyon
|September 19, 2024
概括
一种天然的黄,阿卡塞丁,通过增强SIRT1活性,可以防止急性肺损伤. 这抑制了NF-κB的激活,并减少了炎症性细胞因子的释放,改善了存活率和肺部健康.
科学领域:
- 药理学 药理学是指药理学的学科.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 阿卡是一种具有多种药理活动的天然黄.
- 它的抗炎性质和精确的机制,特别是在急性肺损伤中,需要进一步阐明.
研究的目的:
- 在体内评估阿卡在治疗脂聚糖 (LPS) 诱导的急性肺损伤 (ALI) 中的疗效.
- 在实验室中研究阿卡塞丁对瘤亡因子-α (TNF-α) 刺激的细胞损伤的保护作用.
- 阐明涉及SIRT1和NF-κB信号的潜在分子机制.
主要方法:
- 在体内研究涉及小鼠的LPS诱导ALI,评估生存率,肺部组织病理学和支气管洗液 (BALF) 中的炎症标志物.
- 在体外研究中使用TNF-α刺激的A549细胞来评估细胞活力和炎症性细胞因子水平.
- 通过评估SIRT1活性和表达,NAD+/NADH比率以及NF-κB激活 (包括p65乙化) 来研究关键的分子机制.
主要成果:
- 在LPS诱导的ALI小鼠中,阿卡西显著提高了生存率,并改善了肺部病原体损伤.
- 在BALF中,阿卡塞丁治疗减少了炎症细胞透,蛋白质含量以及TNF-α,IL-6,IL-17和IL-1β的水平.
- 在体内和体外,阿卡西增强了SIRT1的活性和表达,导致NF-κB激活的抑制和炎症反应的减少. 在体外,SIRT1抑制消除了这些效应.
结论:
- 阿卡西显示出对急性肺损伤的显著保护作用.
- 该机制涉及SIRT1活性和表达的上调,这随后抑制了NF-κB-p65.5的乙化依赖激活.
- 这一途径最终导致抑制下游炎性细胞因子释放,为ALI提供治疗潜力.
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