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在发育的胚胎中,由actomyosin依赖的机制调节组织流动
R Marisol Herrera-Perez1, Christian Cupo1, Cole Allan1
1Department of Mechanical Engineering, Columbia University, New York, New York, 10027, USA.
PRX life
|May 13, 2024
概括
胚胎上皮组织的流动是由actomyosin收缩性调节的. 操纵actomyosin张力会改变组织力学,表明同otropic张力会增加类似固体的特性,而异otropic张力会使组织流体化.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 表皮组织流动对于胚胎发育和形态发生至关重要.
- 胚胎上皮组织的机械性质和控制它们的因素尚未完全理解.
- 阿克托米奥辛的收缩性影响细胞和细胞骨网络机制,但其在胚胎组织动态中的体内作用尚不清楚.
研究的目的:
- 为了研究actomyosin-dependent张力如何影响胚胎上皮组织的机械特性和流动动力学.
- 剖析细胞产生的张力在胚胎发育期间调节组织机制中的作用.
主要方法:
- 利用光遗传工具精确的时空操纵在Drosophila生殖带表皮中的actomyosin收缩性.
- 组织机械性质的量化变化,细胞重组和组织水平的流动,以应对改变的actomyosin活动.
主要成果:
- 对actomyosin收缩性的光遗传学操纵显著改变了生殖带表皮的固体-流体机械特性.
- 增加的actomyosin激活导致了更高的整体张力,但降低了张力异构性,导致更像固体的组织特性和流量减少.
- 降低了actomyosin活性降低了张力水平和异型性,导致比野生类型更像固体的特性,但比激活更小.
结论:
- 在胚胎发生过程中,上皮组织的流动通过对组织机械性质的actomyosin依赖调节来控制.
- 组织力学是由张力水平和异构性调节的:异构性张力促进了类似固体的行为,而异构性张力促进了流体化.
- 在胚胎发育过程中,协调调节actomyosin活性对于快速组织重塑至关重要.
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