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集成因特异性信号驱动ER的压力依赖性动脉动脉内皮激活
Cyrine Ben Dhaou1, Zaki Al-Yafeai2, G Ali Cruz-Marquez1
1Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, USA.
Redox biology
|November 22, 2025
概括
纤维素-整体素信号触发了内皮细胞内 (ER) 压力,通过JNK-c-Jun通路放大了炎症. 这种特定于矩阵的ER应激反应对于动脉动脉内皮激活至关重要.
科学领域:
- 心血管生物学 心血管生物学
- 细胞应激反应的应激反应
- 细胞外矩阵生物学 细胞外矩阵生物学
背景情况:
- 动脉样硬化涉及由动脉微环境 (ECM,血流) 和炎症线索 (oxLDL) 驱动的内皮激活.
- 一种ECM蛋白质的纤维素增强了这些刺激在阿瑟罗位点.
- 末质网膜 (ER) 应激在阿瑟罗区域观察到,但其通过ECM的调节和在内皮炎症中的作用尚不清楚.
研究的目的:
- 研究细胞外基质 (ECM) 在内皮细胞中调节ER压力的作用.
- 阐明纤维内素-整合素信号传导对内皮炎症激活有所贡献的机制.
主要方法:
- 在纤维素或底层膜蛋白质上培养的利用内皮细胞.
- 采用了整合素激活和纤维素结合素 (α5,αv) 的基因操纵 (talin1突变,siRNA,基因删除).
- 评估了ER压力标志物,炎症基因表达 (RNA-seq) 和信号通路 (JNK-c-Jun,NF-κB).
主要成果:
- 氧化低密度脂蛋白 (oxLDL) 和干扰的流量诱导ER压力选择性地在纤维内素粘附细胞中,依赖于整合素激活.
- 沉默纤维内素结合因特林或内皮特异性缺失减少了体内ER压力.
- 通过阻止独立于NF-κB的JNK-c-Jun激活,ER压力抑制抑制了炎症基因表达.
结论:
- 纤维素-整体素信号传递是内皮细胞内基因特异性ER应激的关键媒介.
- 这一途径通过JNK-c-Jun信号来强化内皮炎症,以应对机械和代谢压力.
- 在动脉样硬化中发现了一种新的机制,该机制将ECM,ER压力和内皮功能障碍与动脉样硬化相关.
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