相关实验视频
Updated: Jul 1, 2025

Modeling Paracrine Noncanonical Wnt Signaling In Vitro
Published on: December 10, 2021
一个Wnt10a-Notch信号轴控制赫特维格的上皮根盖细胞行为在根裂模式的过程中
Kai Sun1, Miao Yu1, Jiayu Wang1
1Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China.
Wnt10a对于牙根发育至关重要. 失去Wnt10a会扰乱赫特维格上皮根盖 (HERS) 细胞的增殖和分裂,从而导致牛牙. 激活Notch信号部分挽救了这个缺陷.
科学领域:
- 牙科发展生物学 牙科发展生物学
- 牙形态发生的分子机制
背景情况:
- Wnt10a突变会导致牙根发育缺陷的牙牙病.
- 皮质Wnt10a在赫特维格皮质根 (HERS) 细胞行为和根裂模式中的确切作用尚不清楚.
研究的目的:
- 阐明皮质Wnt10a调节 HERS细胞行为的内生机制.
- 为了了解Wnt10a对牙根裂模式的贡献.
主要方法:
- 利用K14-Cre;Wnt10a小鼠研究Wnt10a在HERS中的作用.
- 采用了EDU测定,用于增殖标记的免疫光 (cyclin D1),细胞分裂方向 (E-Cadherin,乙-α-Tubulin) 和信号通路组件 (Jag1,Notch2).
- 研究了通过腺病毒和囊移植的Notch信号激活,以评估救援效应.
主要成果:
- 在Wnt10a缺乏的小鼠中,HERS延伸和水平延伸受损.
- 在HERS中观察到内上皮质 (IEE) 细胞的增殖减少和细胞分裂方向改变.
- 在Wnt10a缺乏的小鼠的HERS IEE细胞中对Jag1和Notch2表达的下调.
- 在Notch信号激活时,部分挽救根裂缺陷.
结论:
- 皮质Wnt10a对于正常的牙根裂形态发生至关重要.
- Wnt10a通过Notch信号通路调节HERS细胞的增殖和水平分裂.
- Wnt10a-Notch信号轴对于正确的牙根发育至关重要.
相关概念视频
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Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
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The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
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