KEAP1/NRF2轴控制人体内皮细胞中LPS诱导的氧化应激,炎症酶激活和caspase-1活动
Alba Montero-Jodra1,2, Maria Jesús Estebán-Amo2,3, Silvia Patricia Fernández-Martínez2
1Department of Surgery, University of Valladolid, Valladolid, Spain.
PloS one
|February 4, 2026
概括
4-octyl itaconate (4-OI) 通过减少氧化应激,保护内皮细胞免受败血症引起的炎症. 这通过KEAP1/NRF2途径发生,抑制炎酶激活和线粒体ROS.
科学领域:
- 细胞的新陈代谢
- 炎症生物学 炎症生物学
- 败血症病理生理学病理生理学
背景情况:
- 内皮细胞在败血症炎症中至关重要,但它们的代谢适应性尚不清楚.
- 巨细胞在炎症期间表现出明显的代谢重新连接,产生抗炎性伊塔康酸盐.
- 人的静脉内皮细胞 (HUVECs) 缺乏内源性伊他康酸盐生产.
研究的目的:
- 为了研究HUVECs对脂聚糖 (LPS) 刺激的代谢反应.
- 为了确定外源的4-octyl itaconate (4-OI) 是否可以调节HUVECs中LPS诱导的炎症.
- 阐明4-OI保护作用的基础分子机制.
主要方法:
- 使用LPS刺激HUVECs,并使用4-OI进行治疗.
- 测量线粒体的活性氧物种 (mitoROS) 和炎症酶激活标记物 (ASC斑,caspase-1).
- 基因沉默KEAP1和NRF2以调查KEAP1/NRF2抗氧化途径及其在4-OI影响中的作用.
主要成果:
- 由LPS刺激的HUVECs没有显示出典型的巨细胞代谢重新连接.
- 4-OI治疗显著降低了LPS诱导的线粒体和HUVECs中的炎症酶激活.
- 4-OI的保护作用通过KEAP1/NRF2通路进行介导,KEAP1的沉默模仿了4-OI的作用.
结论:
- 外源性4-OI保护内皮细胞免受LPS诱导的氧化应激和败血症期间的炎症.
- KEAP1/NRF2抗氧化途径是4-OI在HUVEC中发挥保护作用的主要机制.
- 4-OI代表了一种潜在的治疗策略,用于减轻败血症中的内皮细胞功能障碍.
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