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缺少Atp6i的小鼠模型揭示了转变生长因子-β1 /Smad2/3作为一个关键的信号通路,调节牙细胞分化和牙根形成

Jue Wang^1,2, Abigail McVicar³, Yilin Chen³

¹Department of Pathology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.

International journal of oral science

|August 20, 2023

概括

在小鼠中缺少Atp6i会通过损害口腔细胞分化和TGF-β1信号传递来阻止牙根的形成. 恢复TGF-β1部分挽救了根部发育,揭示了牙再生的关键途径.

科学领域:

生物化学生化学
发展生物学发展生物学
遗传学遗传学是一个

背景情况:

牙根的发育和质细胞分化的机制尚未完全理解.
在这些过程中,ATP6i (ATP6i) 起作用,但其确切的功能尚不清楚.

研究的目的:

研究Atp6i在牙根形成和牙细胞分化中的作用.
阐明潜在的生物分子机制,包括转化生长因子-β (TGF-β) 信号通路.

主要方法:

利用缺少Atp6i (Atp6i-/-) 的小鼠研究牙根的发育.
进行RNA测序 (RNA-seq) 来分析基因表达特征.
通过评估Smad2/3激活和使用条件介质实验来研究TGF-β信号.
在囊下移植的Atp6i-/-小鼠牙细菌与异位TGF-β1.

主要成果:

缺少Atp6i导致牙根形成停止,并截断了赫特维格上皮根盖 (HERS) 的进展.
在Atp6i-/-小鼠中观察到根细胞生细胞的增殖和分化减少.
消极细胞分化标志物 (Col1a1,Nfic,Dspp,Osx) 的下调,以及在Atp6i-/- 消极细胞中Smad2/3激活的受损.
TGF-β1信号传递至关重要,因为其中和阻断了分化,外宫TGF-β1部分挽救了根部的发育.

结论:

对于正常的牙根形成和牙细胞分化,ATP6i是必不可少的.
功能障碍的Atp6i会损害TGF-β1的释放,导致牙细胞分化受损,并可能导致骨质疏松症相关的根缺陷.
TGF-β1 / Smad2 / 3信号通路是牙芽细胞分化和牙根发育的关键调节者,为再生提供治疗点.

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