一个形态遗传波的遗传诱导和机械化学传播
Anaïs Bailles1,2, Claudio Collinet3,4, Jean-Marc Philippe1,2
1IBDM-UMR7288, Aix Marseille Université and CNRS, Marseille, France.
Nature
|August 16, 2019
概括
在Drosophila内皮发育过程中,有两种模式控制着actomyosin的活性. 局部转录启动了肌蛋白II (MyoII) 激活的波浪,然后机械地驱动了进一步的细胞侵入.
科学领域:
- 发育生物学
- 细胞生物学
- 生物物理
背景情况:
- 组织形态发生依赖于由actomyosin收缩驱动的细胞形状变化.
- 基因表达模式调节了细胞的收缩性,以区域化细胞行为.
研究的目的:
- 研究Drosophila内皮形态发生过程中控制Rho1和myosin II (MyoII) 激活的机制.
- 阐明转录和机械线索之间的相互作用,
主要方法:
- 使用Drosophila作为一个模型生物.
- 研究Rho1和MyoII激活模式.
- 检查了雾配体和机械反在细胞发育中的作用.
主要成果:
- 确定了Rho1-MyoII激活的两种模式:局部转录启动和组织规模波.
- 证明波是由MyoII机械驱动的, 而不是持续转录或雾.
- 表明一个细胞列中的MyoII激活和发育促进了通过整合素在下一行中的粘附和随后的激活.
结论:
- 草内皮形态发生由局部转录启动,并通过机械驱动的反循环传播.
- 肌肉II活动和细胞变形创造了一个循环,驱动着细胞的连续发育和组织的形成.
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