在细胞机械感应中对机械损失的化学补偿
Qin Ni1,2, Zhuoxu Ge1,2, Anindya Sen1,3
1Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218.
概括
哺乳动物细胞使用化学补偿机制来调整细胞体积和pH,以应对机械刺激. 这涉及PI3K/Akt路径和-交换器1 (NHE1).
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 系统生物学 系统生物学
背景情况:
- 哺乳动物细胞整合化学和机械信号进行适应.
- 机械转导调节细胞生理学,影响恒常状态.
- 了解机械化学相互作用是细胞适应的关键.
研究的目的:
- 研究细胞反应中的化学和机械信号之间的相互作用.
- 阐明细胞体积和pH的非单调变化背后的机制.
- 确定参与细胞适应物理刺激的调节途径.
主要方法:
- 将细胞置于物理刺激和actomyosin细胞骨破坏的条件下.
- 测量细胞体积和细胞内pH值.
- 使用数学建模来分析监管网络.
- 将纤维瘤细胞与正常纤维细胞的反应进行比较.
主要成果:
- 细胞在物理压力下表现出体积和pH的非单调变化.
- 动氨酸的破坏激活PI3K/Akt通路,导致NHE1的激活.
- 这导致细胞内pH值和细胞体积增加.
- 在PI3K/Akt和MAPK/ERK路径之间的竞争性相互作用调节了反应.
- 在HT1080纤维瘤细胞中观察到改变的调节系统.
结论:
- 一个化学补偿机制整合了机械和化学信号.
- PI3K/Akt和NHE1通路介导细胞体积和pH调节.
- 路径竞争影响细胞适应.
- 癌细胞的机械分歧表明机械感觉发生了变化.
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