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eNOS通过控制小鼠胚胎发生过程中的β-catenin信号来调节淋巴的规范性
Drishya Iyer1, Diandra M Mastrogiacomo1, Kunyu Li1
1Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa.
Arteriosclerosis, thrombosis, and vascular biology
|September 28, 2023
概括
内皮NO合成酶 (eNOS) 直接与β-catenin结合,独立于NO,以调节淋巴发育. 这一发现揭示了淋巴规范的新机制,对于预防淋巴等疾病至关重要.
科学领域:
- 血管生物学 血管生物学
- 发育生物学是发展生物学.
- 细胞信号传递 细胞信号传递
背景情况:
- 淋巴对于单向淋巴输送至关重要,它们的功能障碍会导致淋巴等疾病.
- 淋巴的发育是通过机械传导信号发起的,以响应胚胎发生过程中的振荡性淋巴流.
- 内皮NO合成酶 (eNOS) 是已知的血管剪切应激因子,但其在淋巴发育中的作用尚不清楚.
研究的目的:
- 研究eNOS在淋巴发育中的作用.
- 阐明参与eNOS介导的淋巴形成的信号通路.
主要方法:
- 利用了全球第3位的淘汰赛小鼠和人类皮肤淋巴内皮细胞.
- 检查了β-catenin激活,核转位和蛋白表达.
- 进行共免疫沉和近距离结合测试以评估蛋白质相互作用.
- 研究了Foxo1基因切除对淋巴的特异性的影响.
主要成果:
- 失去eNOS将淋巴的特异性降低了45%,并抑制了β-catenin激活和核转位.
- 在体内和体外对eNOS下调的β-catenin标蛋白进行基因淘汰/淘汰.
- eNOS直接与β-catenin结合,通过振荡式剪切应力增强结合.
- 在eNOS淘汰赛小鼠中,Foxo1基因切除部分挽救了门规范缺陷.
结论:
- 证明了eNOS在淋巴规范中的新,无NO独立的作用.
- 提出了一个 eNOS 直接结合β-catenin 调节其核转位和转录活动的机制.
- 强调了eNOS-β-catenin相互作用在淋巴发育中的重要性.
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