Axin1通过抑制Hertwig的上皮根盖中的AKT1-mTORC1激活和Shh翻译来调节牙根的发育
Xiaoyu Zheng1,2, Hongcan Huang1,2, Zhipeng Zhou3
1State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China.
概括
赫特维格上皮根盖 (HERS) 中的axin1对于牙根的发育至关重要. 它的缺失会通过AKT1-mTORC1途径扰乱核糖体生物发生和mRNA翻译,导致根缺陷.
科学领域:
- 牙科生物学 牙科生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 赫特维格的上皮根盖 (HERS) 对于牙根的发育至关重要.
- 在根部发育中调节 HERS 功能的关键基因在很大程度上是未知的.
研究的目的:
- 调查Axin1在HERS在牙根发育过程中的作用.
- 阐明Axin1在根形成中的功能背后的分子机制.
主要方法:
- 使用了在HERS中Axin1移除的小鼠模型.
- 分析了正规的Wnt信号传递,AKT1-mTORC1通路,核糖体生物发生和mRNA转化.
- 研究了Rptor哈普洛因不足和Shh信号抑制的影响.
主要成果:
- 在HERS中,Axin1的表达很高,对正常的根部发育至关重要.
- 在HERS中Axin1缺乏导致根缺陷独立于正规Wnt信号.
- 亚克辛1调节AKT1-mTORC1通路,控制核糖体生物发生和mRNA转化.
- 由于增强的mTORC1活动,Axin1的失活导致Sonic hedgehog (Shh) 的过度产量.
- Rptor的哈普洛因缺乏或Shh抑制可以挽救Axin1依赖的根缺陷.
结论:
- Axin1独立于正规的Wnt信号来控制牙根的发育.
- 亚克辛1通过AKT1-mTORC1通路调节核糖体生物发生和mRNA转化.
- 这一途径影响Shh合成,突出了根形成中的新机制.
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