炎症诱导的内皮细胞激活和血管新生发芽由基特异性化酶20下调
bioRxiv : the preprint server for biology
|June 6, 2025
概括
乌比基特异性酶20 (USP20) 抑制了内皮细胞中NFκB信号传递和血管生成. 抑制USP20活动促进血管新生,而其表达减少它,为动脉样硬化和癌症提供治疗潜力.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 心血管研究研究心血管研究
背景情况:
- 核因子-κB (NFκB) 途径驱动与炎症相关的血管生成,对动脉样硬化和瘤生长至关重要.
- 已知乌比基特异性酶20 (USP20) 在光滑肌细胞中抑制NFκB,但其在内皮细胞 (ECs) 中的作用尚不清楚.
研究的目的:
- 研究USP20在调节内皮细胞内NFκB信号传递和血管生成中的作用.
- 为了确定USP20的活性和酸化状态是否会影响EC功能和病态血管生成.
主要方法:
- 利用来自野生类型和USP20淘汰赛小鼠的初级EC和小鼠冠状动脉内皮细胞 (MCEC).
- 使用USP20 (野生型,主导负型,模仿型,抗型变种) 的基因操纵来评估NFκB活性和血管生成潜力.
- 进行了体外测试 (伤,球形) 和体外测试 (大动脉环) 以量化血管生成和细胞迁移. 确定MMP3作为一个关键的下游目标.
主要成果:
- Usp20缺乏或不活跃的USP20变体增加了ECs中的NFκB活性和血管生成.
- 活跃的USP20或耐药变体会削弱NFκB信号传递,降低血管生成.
- USP20调节矩阵金属蛋白酶3 (MMP3),一个下游NFκB目标,影响血管发芽.
结论:
- USP20 作为内皮细胞中NFκB驱动的血管生成的负调节剂.
- USP20表达水平与病态血管生成的程度相反相关.
- 向USP20酸化,特别是Ser334,是控制癌症和动脉样硬化等疾病中的血管生成的潜在治疗策略.
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