介质细胞-内皮细胞过渡有助于心脏新血管化
Eric Ubil1, Jinzhu Duan2, Indulekha C L Pillai2
1Department of Cell Biology &Physiology, School of Medicine, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
Nature
|October 16, 2014
概括
心脏纤维细胞在心脏受伤后可以转化为内皮细胞,有助于修复. 蛋白质p53对于这一过程至关重要,为心脏病提供了潜在的治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 内皮细胞对于血管形成至关重要.
- 已知心脏纤维细胞分化为内皮细胞 (内皮细胞到介质细胞的转变).
- 心脏纤维细胞采取内皮命运并在心脏损伤后促进新血管化的潜力仍然未被探索.
研究的目的:
- 为了研究心脏纤维细胞是否可以在心脏损伤后过渡到内皮细胞.
- 确定转录因子p53在这个过程中的作用.
- 评估调节这种过渡进行心脏修复的治疗潜力.
主要方法:
- 在心脏损伤模型中利用遗传命运映射技术.
- 分析了纤维细胞衍生的内皮细胞的表型和功能特征.
- 研究了p53调制 (损失和刺激) 对细胞命运,血管化和心脏功能的影响.
主要成果:
- 观察到心脏纤维细胞在缺血性心脏损伤后迅速采用内皮细胞类型的表型.
- 来自纤维细胞的内皮细胞表现出原生内皮细胞的特征.
- 纤维细胞中p53的损失导致内皮细胞的形成受损,血管密度降低,心脏功能恶化.
- 刺激p53通路增强了介质细胞到内皮细胞的过渡,改善了血管性,改善了心脏功能.
结论:
- 心脏纤维细胞的介质细胞到内皮细胞的过渡是损伤心脏中新血管化的重要贡献者.
- 转录因子p53在这种细胞重编程中起着关键的调节作用.
- 调节p53通路是一个有前途的治疗策略,用于促进心脏修复和加强心肌梗塞后的血管性.
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