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对参与牙细胞分化机制的转录因子的全面分析
Haruka Nakazato1, Shoko Onodera2, Natsuko Aida2
1Department of Endodontics, Tokyo Dental College, 2-9-18 Kanda-Misaki-Chou, Chiyoda, Tokyo, 101-0061, Japan.
Medical molecular morphology
|July 10, 2024
概括
研究人员确定了关键的转录因子,这些因子对于在培养物中维持芽细胞身份至关重要. 激活特定的信号通路,如Notch和Hedgehog,与生长因子一起,有助于保存牙细胞表型.
科学领域:
- 牙科生物学 牙科生物学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 初级培养的芽细胞迅速失去其特定的组织特征.
- 识别维持质细胞表型的因素对于再生牙科和研究至关重要.
研究的目的:
- 为了确定转录因子 (TFs),在初级培养物中维持芽细胞表型至关重要.
- 调查,Notch和即时早期基因 (IEGs) 在芽细胞培养维护中的作用.
主要方法:
- 分离初级C57BL/6J小鼠牙间细胞 (DMC).
- 使用RNA测序 (RNA-seq) 进行全面的基因表达分析,将新鲜分离的细胞与2天培养进行比较.
- 使用lentiviral向量强制表达特定的TF和通路激活器 (FGF4,FGF9,CHIR99021).
主要成果:
- 在2天内,在培养的小鼠牙介质细胞中,Odontoblast标记基因表达显著下降.
- 与相关的,与Notch相关的和与直接早期基因 (IEG) 相关的转录因子的表达也下降了.
- 这些TFs的强制表达,以及FGF,Wnt激活剂,显著诱导了臭性标记基因表达.
结论:
- 缺口信号传递和即时早期基因 (IEGs) 对于在培养物中维持芽细胞表型至关重要.
- 同时激活FGF,Wnt,Hedgehog,Notch通路和IEG转录因子,可以协同维持牙细胞表型.
- Hedgehog 和 Notch 信号通路在维持口腔细胞表型方面发挥着重要作用,补充了 FGF 和 Wnt 信号.
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