Wnt导向的表达CXCL12的尖端乳头前细胞驱动牙根的形成
Mizuki Nagata1,2, Gaurav T Gadhvi3, Taishi Komori4
1Department of Orthodontics, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, USA.
Nature communications
|July 2, 2025
概括
在牙上表达CXCL12的细胞对于牙根的形成至关重要. 这些细胞分化为牙芽细胞和水泥芽细胞,表现出可塑性和Wnt依赖性调节牙再生.
科学领域:
- 牙科生物学 牙科生物学
- 干细胞生物学 干细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 牙根的形成对于牙的定至关重要,并且涉及到牙角 (AP).
- 根部发育中的AP细胞的精确生理协调尚不清楚.
- 来自AP的介酶干细胞具有再生疗法的潜力.
研究的目的:
- 识别和特征细胞群在牙上,驱动牙根的形成.
- 阐明这些关键AP细胞的分化潜力和调控机制.
- 探索特定信号通路在维护牙原生细胞命运中的作用.
主要方法:
- 在小鼠模型中利用基于Cxcl12-creER的细胞系谱追踪.
- 在低氧条件下研究了细胞的出现.
- 研究了Wnt信号抑制和TGF-β受体抑制 (galunisertib) 对细胞命运的影响.
主要成果:
- 在根形成开始的低氧条件下,在AP中确定了表达CXCL12的细胞.
- 这些CXCL12+细胞分化为牙细胞和水泥细胞,有助于根的延长.
- CXCL12+细胞表现出可塑性,在再生条件下分化为骨质母细胞.
- Wnt通路的无活化导致了根断层和异常的纤维细胞命运,这些命运被galunisertib缓解.
结论:
- 顶叶叶片中的CXCL12+细胞是关键的牙介质原生细胞.
- 这些祖先以Wnt-依赖的方式维持了odonto-cementogenic命运.
- 这些细胞的可塑性凸显了它们在牙根形成和再生潜力中的重要作用.
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