细胞拉伸激活了一个ATM机械转导通路,该通路重塑细胞骨和染色质
Giulia Bastianello1, Giancarlo Porcella2, Galina V Beznoussenko2
1IFOM, the FIRC Institute of Molecular Oncology, 20139 Milan, Italy; Oncology and Haemato-Oncology Department, University of Milan, 20122 Milan, Italy.
Cell reports
|December 13, 2023
概括
ATAXIA-telangiectasia突变 (ATM) 激酶通过细胞骨架和活性氧物种 (ROS) 对机械应激做出反应,影响ATAXIA-telangiectasia (A-T) 中的细胞刚性和迁移. 这揭示了ATM超出DNA损伤之外的机械反应作用.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 遗传学 遗传学 是一个
背景情况:
- ATAXIA telangiectasia突变 (ATM) 和ATAXIA telangiectasia与Rad3相关 (ATR) 是DNA损伤反应 (DDR) 激酶.
- ATM对活性氧物种 (ROS) 和ATR对机械应力做出反应.
- ATM突变会导致神经衰退性疾病 - - 神经衰退性疾病 - - 神经衰退性障碍 (A-T) 的发生.
研究的目的:
- 调查ATM如何对机械应力做出反应.
- 阐明机械力的ATM激活背后的机制.
- 了解ATM在细胞机械反应中的作用及其与ATT临床特征的关系.
主要方法:
- 在生物体内成像成像.
- 电子显微镜的电子显微镜
- 蛋白质组学是指蛋白质组学.
- 机械生物学方法的方法.
主要成果:
- 细胞骨和ROS,而不是Mre11,在细胞变形后调解ATM激活.
- ATM 缺乏导致细胞刚度增加,压力纤维积累,并在迁移过程中改变了膜特性.
- 在机械应力时,ATM定位到actin细胞骨架,并在机械应力时酸化细胞骨架和染色质的调节剂.
结论:
- ATM在细胞机械响应中起着至关重要的作用,与其标准的DDR功能不同.
- 这一发现有助于解释阿塔克西亚 (ataxia telangiectasia) 的临床症状.
- 在一个集成的细胞机械反应通路中,ATM和ATR表现出不同的作用.
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