在肝肺综合征小鼠中,循环BMP9的升高会通过ALK1-Endoglin-Smad1/5/9信号传递加剧肺血管生成
Chunyong Yang1, Mei Sun1, Yihui Yang1,2
1Department of Anesthesiology, Southwest Hospital, Third Military Medical University, Chongqing, China.
European journal of clinical investigation
|April 9, 2024
概括
从肝脏中提升的骨形态蛋白9 (BMP9) 通过ALK1通路促进肝肺综合征 (HPS) 中的肺血管生长. 这种BMP9信号传递也推动了HPS中亲血管性单细胞的积累.
科学领域:
- 肝病学和肺部医学 肝病学和肺部医学
- 分子生物学分子生物学
- 血管新生研究研究
背景情况:
- 骨形态遗传蛋白9 (BMP9) 是一种肝脏分泌的蛋白质,与肝脏疾病的进展有关.
- 在肝肺综合征 (HPS) 中BMP9的确切作用仍然不完全理解.
- 这项研究调查了BMP9在HPS中的影响和信号机制.
研究的目的:
- 评估普通胆道结合 (CBDL) 对HPS大鼠模型中BMP9表达的影响.
- 阐明BMP9信号传递对HPS肺血管功能障碍有所贡献的机制.
- 探索BMP9在肺微血管中的单细胞积累中的作用.
主要方法:
- 在由CBDL诱导的HPS的老鼠模型中分析循环BMP9水平.
- 评估HPS大鼠血清对肺血管内皮细胞的 in vivo 和 in vitro 影响.
- 研究BMP9信号通路,包括活性蛋白受体类激酶1 (ALK1),内分泌素和Smad1/5/9.9.
主要成果:
- 与对照组相比,HPS大鼠的循环BMP9水平显著升高.
- 升高的BMP9通过ALK1-Endoglin-Smad1/5/9通路促进了内皮细胞的增殖和管的形成.
- 通过向ALK1来抑制BMP9信号传递,可以减少这些亲血管性效应和单细胞积累.
- 增加的BMP9与增强的肺血管密度和亲血管性单细胞透相关.
结论:
- 来自肝脏的循环BMP9升高通过ALK1-Endoglin-Smad1/5/9通路驱动HPS中的肺血管生成.
- 在HPS期间,BMP9信号通路参与了肺微血管中亲血管性单细胞的积累.
- 准BMP9通路可能为HPS提供治疗潜力.
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