相关实验视频
Updated: Aug 23, 2025

Culturing and Manipulation of O9-1 Neural Crest Cells
Published on: October 9, 2018
河马-雅普信号维护阴耳节点恒温
Mingjie Zheng1, Rich G Li2, Jia Song3
1Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston (M.Z., X.Z., S.E., W.C., Jun Wang).
河马-雅普通路对于维持心脏起器功能至关重要. 扰乱阴耳节细胞中的Lats1/2激酶会导致功能障碍,但通过抑制Yap和Taz来挽救这一问题.
科学领域:
- 心脏病学 心脏病学
- 分子生物学分子生物学
- 信号通道的信号通道
背景情况:
- 鼻腔节点 (SAN) 是心脏的自然起器,负责启动节奏的心跳.
- 了解SAN功能是有限的,因为它的小尺寸和复杂性.
- 河马信号通路对于心脏发育和再生至关重要,但其在SAN中的作用尚不清楚.
研究的目的:
- 研究Hippo通路调节器在SAN心脏起器细胞中的作用.
- 为了确定心脏传导系统中的Hippo-Yap通路的功能.
主要方法:
- 使用心脏导导系统特定的Cre驱动器 (Hcn4-Cre) 在SAN细胞中的Hippo激酶 (Lats1/2) 和效应器 (Yap/Taz) 的条件失活.
- 生理学评估包括遥测心电图,心声和成像.
- 分子分析涉及马森三色染色,免疫染色,RNAscope,CUT&Tag测序,qPCR和西式斑点.
主要成果:
- 在SAN细胞中Lats1/2的失活导致严重的鼻节功能障碍,其特征是处理失调和纤维化增加.
- 观察到的表型是通过Yap和Taz的遗传删除来拯救的,这表明Lats1/2通过Hippo-Yap路径发挥作用.
- 雅普调节参与平衡 (Ryr2) 和纤维化 (Tgfb1,Tgfb3) 的基因,而Lats1/2的失活会改变这些基因的表达.
结论:
- 规范的Hippo-Yap通路对于维持SAN平衡至关重要.
- 这项研究阐明了Hippo-Yap通路在调节心脏起器功能和组织完整性方面的新作用.
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