通过与BRD4结合,S100A4参与败血症诱导的内皮细胞炎症反应和屏障损伤
1Department of Infectious Diseases, Yueqing People's Hospital, Wenzhou City, Zhejiang, China.
Clinical hemorheology and microcirculation
|May 28, 2025
概括
蛋白质S100A4通过与BRD4.4结合,加剧了人类静脉内皮细胞 (HUVECs) 中的败血症引起的损伤. 抑制S100A4可以保护HUVECs免受脂聚糖 (LPS) 损伤,减少炎症和屏障功能障碍.
科学领域:
- 内皮细胞生物学 内皮细胞生物学
- 败血症的分子机制
- 炎症和免疫的作用
背景情况:
- 在暴露于败血清的内皮细胞中,S100A4被上调.
- 内源S100A4在脂聚糖 (LPS) 诱导的内皮细胞损伤中的作用需要进一步研究.
研究的目的:
- 探索内源性S100A4在脂聚糖 (LPS) 诱导的人类静脉内皮细胞 (HUVECs) 损伤中的作用.
- 在LPS诱导的HUVEC中研究S100A4和BRD4之间的相互作用.
主要方法:
- 建立了一个LPS诱导的HUVEC损伤模型.
- 使用了siRNA-S100A4转染和Ov-BRD4等离子体转染.
- 使用在线数据库进行目标预测和免疫沉降 (IP) 验证.
- 评估了细胞活力,细胞亡,屏障功能 (TER,紧结蛋白) 和炎症反应 (细胞因子,单细胞粘附,粘附分子).
主要成果:
- 在LPS诱导的HUVEC中,S100A4与BRD4结合;这两种蛋白质都被上调.
- 干扰S100A4增强了细胞活力,屏障功能和Bcl2表达,同时减少了细胞亡,炎症性细胞因子 (TNFα,IL-1β,IL-6),单细胞粘附以及亲细胞亡和粘附分子的表达.
- 过度表达BRD4可以抵消S100A4干扰的保护作用.
结论:
- 在LPS诱导的炎症反应和HUVECs屏障损伤中,S100A4起着至关重要的作用.
- S100A4通过与BRD4.4的相互作用来调解这些效应.
- 向S100A4可能为败血症引起的内皮功能障碍提供治疗策略.
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