缺陷的间酶体Bmpr1a介导的BMP信号导致先天性肺囊
Yongfeng Luo1, Ke Cao2, Joanne Chiu1
1Department of Surgery, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, CA 90027.
bioRxiv : the preprint server for biology
|October 9, 2023
概括
介酶体BMP受体1a (Bmpr1a) 信号传递对于正常的肺部发育至关重要. 它的破坏会通过Smad独立的途径影响呼吸道发育,从而导致先天性肺囊.
科学领域:
- 发展生物学 发展生物学
- 细胞信号传递 细胞信号传递
- 肺部病理学 肺部病理学
背景情况:
- 先天性肺囊源于异常的肺发育,其机制尚不清楚.
- 肺介质细胞对这些缺陷的贡献还没有得到充分研究.
研究的目的:
- 研究BMP受体1a (Bmpr1a) 介导的信号在产前肺发育过程中的肺介质中的作用.
- 为了阐明介质Bmpr1a对先天性肺囊形成的贡献.
主要方法:
- 生成的介酶Bmpr1a淘汰赛小鼠模型.
- 分析了肺部分支形态发生和细胞群.
- 研究了BMP连接体表达和上皮信号通路 (Sox2-Sox9轴).
- 检查了Smad1/5下游影响者的作用.
主要成果:
- 介质细胞Bmpr1a的废除扰乱了肺分支的形态发生,导致产前肺囊.
- 中介细胞Bmpr1a缺乏导致呼吸道光滑肌细胞和弹性纤维减少.
- 观察到宫外BMP连接体表达和上皮细胞Sox2-Sox9轴的改变.
- 删除Smad1/5并没有复制囊性表型,表明Smad独立的机制.
结论:
- 由Bmpr1a介导的间酶体BMP信号传递对于正常的产前肺部发育至关重要.
- 被破坏的介质细胞Bmpr1a信号传递有助于通过Smad独立的途径导致先天性肺囊.
- 揭示了涉及肺介质的先天性肺囊的新型致病机制.
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