减少线粒体分裂改善了依赖HIF-1α的病理性视网膜血管生成
Shu-Qi Huang1, Kai-Xiang Cao1, Cai-Ling Wang1
1School of Basic Medical Sciences; The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Guangzhou Medical University, Guangzhou, 511436, China.
Acta pharmacologica Sinica
|April 2, 2024
概括
针对由动胺相关蛋白1 (DRP1) 驱动的线粒体裂变,可以抑制眼睛疾病中的病理性血管生成. 这种方法减少了反应性氧物种 (ROS) 的产生,并显示出治疗增殖性视网膜病变的前景.
科学领域:
- 细胞生物学 细胞生物学
- 眼科医生 眼科 眼科
- 生物化学 生化学
背景情况:
- 血管新生在病理过程中至关重要,例如早产视网膜病变,这是导致失明的原因.
- 内皮线粒体通过活性氧物种 (ROS) 和信号调节血管生成.
- 线粒体动力学,包括融合和裂变,是这些过程的关键.
研究的目的:
- 研究线粒体动态在病态视网膜血管生成中的作用.
- 探索在增殖性视网膜病变中准线粒体裂变的治疗潜力.
主要方法:
- 使用了用血管内皮生长因子 (VEGF) 治疗的人类脉内皮细胞 (HUVEC).
- 研究了动胺相关蛋白1 (DRP1) 和其抑制剂Mdivi-1的作用.
- 使用氧气诱导视网膜病变 (OIR) 的小鼠模型.
主要成果:
- 在HUVEC中,VEGF通过DRP1酸化诱导了线粒体裂变.
- DRP1抑制阻断了VEGF诱导的HUVEC迁移,增殖和管道形成.
- VEGF增加了ROS的产生,这对于依赖HIF-1α的糖分和血管生成至关重要;抑制裂变减少了ROS.
- 在OIR小鼠的视网膜新血管中发现了活跃的DRP1.
- 在OIR模型中,Mdivi-1治疗显著降低了病理性血管生成.
结论:
- 由DRP1调节的线粒体分裂是病理性血管生成的关键驱动因素.
- 抑制线粒体裂变可以减少ROS的产生,并缓解新血管化.
- 准线粒体裂变为增殖性视网膜病变和其他血管生成依赖疾病的潜在治疗策略.
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