siLOXL2 抑制了由ox-LDL引起的内皮炎症反应和EndMT
Jing Ma1, Jia Ling1, Rui Tong1
1Department of Cardiology, Shanghai Pudong Hospital Affiliated to Fudan University, Shanghai, China.
Cerebrovascular diseases extra
|October 17, 2024
概括
类似于lysyl氧化酶2 (LOXL2) 的沉默可以防止氧化低密度脂蛋白 (ox-LDL) 诱导的内皮细胞功能障碍. 这种保护作用与抑制内皮-介质酶过渡 (EndMT) 途径有关.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 细胞病理学细胞病理学
背景情况:
- 动脉样硬化 (AS) 涉及内皮细胞 (EC) 功能障碍.
- 氧化低密度脂蛋白 (ox-LDL) 是AS发病的一个关键因素.
- 在ox-LDL诱导的EC损伤中,酸氧化酶 (LOX) 类2 (LOXL2) 的作用需要阐明.
研究的目的:
- 研究LOXL2在牛-LDL诱导的人静脉内皮细胞 (HUVEC) 功能障碍中的作用和机制.
- 为了确定LOXL2静音是否可以保护HUVECs免受ox-LDL诱导的损伤.
主要方法:
- 用不同度的ox-LDL处理HUVEC.
- 使用小干扰RNA (siLOXL2) 沉默了LOXL2表达.
- 测试包括西斑,RT-qPCR,细胞迁移,ROS测量,氧化应激标志物,ELISA和粘附测试.
主要成果:
- 在HUVECs中,LOXL2表达被ox-LDL上调.
- LOXL2沉默降低了ox-LDL诱导的EC迁移,ROS产生和炎症性细胞因子释放 (IL-1β,IL-6,TNF-α).
- 洛克斯2抑制了内皮 - 介质细胞转换 (EndMT) 的减弱标记物,包括减少α-平滑肌动蛋白和维丁,以及增加CD31和·维勒布兰德因子.
结论:
- LOXL2静音保护可以防止ox-LDL诱导的内皮细胞功能障碍.
- 保护机制涉及EndMT通路的抑制.
- 准LOXL2可能代表动脉样硬化症的治疗策略.
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