细胞外矩阵刚度通过核因子-Y (NF-Y) 转录因子控制心脏纤维细胞的增殖
Reza Ebrahimighaei1, Nathalie Tarassova1, Samuel C Bond2
1Department of Translational Health Sciences, Bristol Medical School, Bristol, BS2 8HW, United Kingdom.
Biochimica et biophysica acta. Molecular cell research
|November 23, 2023
概括
核因子-Y (NF-Y) 驱动心脏纤维细胞增殖在硬的细胞外基质上,独立于已知的途径. 这一发现揭示了导致心脏纤维化和心力衰竭的新机制.
科学领域:
- 心血管生物学 心血管生物学
- 细胞机械传导 细胞机械传导
- 分子心脏病学分子心脏病学
背景情况:
- 心脏纤维细胞 (CF) 的增殖导致心脏纤维化,心肌硬化和心力衰竭.
- CF对细胞外矩阵 (ECM) 刚性做出反应,增加原合成和增殖,创建一个积极的反循环.
- 现有的模型涉及YAP-TEAD和MKL1-SRF作为关键机械敏感的转录因子.
研究的目的:
- 为了确定新型机制,调节CF扩散,以应对病理上硬的ECM.
- 研究核因子-Y (NF-Y) 作为CF中机械敏感调节者的作用.
主要方法:
- 研究了CF扩散和基因表达在不同的ECM度.
- 评估了NF-Y的作用,包括NF-YA蛋白水平和转录活性.
- 利用siRNA和主导阴性突变体来抑制NF-Y功能.
- 研究了FAK信号对NF-YA蛋白水平的影响.
主要成果:
- 一个硬的ECM通过独立于YAP-TEAD和MKL1-SRF的机制增强了CF的扩散.
- 核因子-Y (NF-Y) 作为一种新的机械敏感转录因子,调解这种增强的扩散.
- 刚性ECM增加NF-YA蛋白水平和NF-Y转录活性,驱动细胞循环基因表达.
- NF-YA水平由FAK信号调节,将ECM组成与NF-Y活动联系起来.
- 抑制NF-Y阻断了硬基质上的增殖,而其过度表达增强了软基质上的增殖.
结论:
- NF-Y是一个关键的生物机械敏感的转录因子,在严格的ECM条件下促进CF的扩散.
- NF-Y代表了缓解心脏纤维化和功能障碍的新型治疗标.
- 这一发现揭示了细胞对心脏矩阵刚性的反应中的新途径.
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