格雷姆林在肺高血压的发病过程中发挥着关键作用
Edwina Cahill1, Christine M Costello, Simon C Rowan
1University College Dublin, School of Medicine and Medical Sciences, Belfield, Dublin 4, Ireland.
肺部增加的格雷姆林素有助于慢性低氧性肺部疾病中的肺高血压. 降低格雷姆林的水平可以改善骨形态遗传蛋白 (BMP) 信号传递,减弱血管重塑,提供潜在的治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 肺部医学 肺部医学
- 分子生物学分子生物学
背景情况:
- 肺高血压 (PH) 是慢性低氧性肺病的严重并发症.
- 改变的骨形态遗传蛋白 (BMP) 信号传导与PH病原发生有关.
- 在低氧PH中减少BMP信号的机制以前是未知的.
研究的目的:
- 阐明在低氧性肺高血压中减少BMP信号传递的机制.
- 为了研究BMP抗剂的作用,格雷姆林,在低氧PH.
- 评估格雷姆林作为PH的治疗点的潜力.
主要方法:
- 量化小鼠肺部和其他器官中的格雷姆林1和格雷姆林2表达.
- 在缺氧条件下,研究了人类肺微血管内皮细胞的格雷姆林分泌物.
- 评估了格雷姆林1缺乏对BMP信号传递和低氧小鼠肺血管抵抗的影响.
- 从人类PH患者的肺血管中检查了格雷姆林的局部化.
主要成果:
- 格雷姆林1和2的表达在肺部更高;格雷姆林1在缺氧小鼠肺血管中增加.
- 低氧诱导的格雷姆林分泌物抑制了内皮BMP信号传递和修复.
- 格雷姆林1缺乏改善了BMP信号传递,并减少了缺氧小鼠的血管重塑和抵抗力.
- 在患有异常性和遗传性肺动脉高血压的患者的肺血管中观察到格林林的增加.
结论:
- 升高的格雷姆林在缺氧诱导的肺血管重塑和PH的抵抗增加中发挥着关键作用.
- 高基底肺格雷姆林表达可能解释肺循环对PHBMP受体突变的脆弱性.
- 向格雷姆林为治疗低氧性肺高血压提供了一个潜在的策略.
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