细胞是依赖于ER应激的芽细胞前细胞
T Ouchi1, M Ando1, R Kurashima1
1Department of Physiology, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan.
Journal of dental research
|February 5, 2025
概括
神经/质抗原2 (NG2) 阳性细胞分化为功能性牙细胞,协调牙修复. 激活转录因子6a (ATF6a) 是这一过程的关键,它将内质网膜应激与质细胞再生和矿化联系起来.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 生物化学 生物化学
背景情况:
- 牙细胞对牙形成至关重要,并且具有由像Piezo1.1这样的道介导的机械感知特性.
- (Ca2+) 信号传递,涉及流入和细胞内存储物,如内质网膜 (ER),对于细胞功能至关重要.
- 周血管细胞,包括NG2阳性周细胞,与口腔细胞相互作用,但它们在牙再生中的作用尚未完全理解.
研究的目的:
- 为了研究NG2阳性乳细胞的分化潜力,使其成为牙细胞.
- 阐明ER应激和ATF6a在牙细胞再生和牙形成中的作用.
- 了解ER压力,Ca2+信号传递和Piezo1活动在牙芽细胞系细胞之间的相互作用.
主要方法:
- 在小鼠体内遗传减少芽细胞以诱导再生.
- 使用NG2作为细胞周边细胞标记物.
- 使用ER压力诱导剂 (thapsigargin) 和抑制剂 (Piezo1抑制剂,ATF6a/NG2基因沉默).
- 测量细胞内Ca2+度并评估矿化能力.
主要成果:
- NG2阳性细胞在失去细胞后分化为Piezo1阳性细胞,有助于修复性牙形成.
- ATF6a对于NG2阳性皮质细胞分化为功能性牙芽细胞至关重要.
- 由SERCA抑制诱导的ER应激增强了口腔细胞原生细胞中的Piezo1介导的Ca2+反应.
- 对ATF6a或NG2的基因沉默会损害Odontoblast血统细胞矿化.
结论:
- ATF6a在调节NG2阳性乳细胞分化成功能性口腔细胞中发挥着关键作用.
- 这些新形成的口腔细胞具有感觉和牙形成能力,这对于牙修复至关重要.
- 该研究强调了一种涉及ER应激和ATF6a的新机制,用于调节牙细胞再生和机械感应.
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