特定的CaMKIIs在斑马鱼早期发育过程中调解了融合延伸细胞运动
Jamie J McLeod1, Sarah C Rothschild1, Ludmila Francescatto2
1Department of Biology and VCU Life Sciences, Virginia Commonwealth University, Richmond, Virginia, USA.
概括
在斑马鱼中,依赖-卡尔莫杜林蛋白蛋白激酶II (CaMKII) 的循环激活对于胃化过程中的细胞迁移至关重要. 这种由两个基因编码的激酶在融合延伸细胞运动中起着至关重要的作用.
科学领域:
- 发育生物学是发展生物学.
- 分子和细胞生物学分子和细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 非正规的Wnts是影响细胞内 (Ca2+),Ca2+/calmodulin依赖蛋白激酶 (CaMKII) 和脊椎动物胃流中的细胞运动的形态原体.
- 斑马鱼胚胎发生涉及七个CaMKII基因,其中camk2b1和camk2g1被特别确定为对汇聚延伸 (CE) 细胞运动至关重要.
研究的目的:
- 研究CaMKII在斑马鱼胚胎发生中的作用,特别是它在胃流动期间参与细胞迁移的作用.
- 阐明CaMKII影响融合延伸 (CE) 细胞运动的分子机制.
主要方法:
- 使用Morpholino诱导的淘汰 (morphants) 和CRISPR/Cas9基因编辑 () 来研究斑马鱼的CaMKII功能.
- 用药学干预措施,包括thapsigargin用于过度激活和主导负 CaMKII表达,用于评估CaMKII活性.
- 对胚胎表型,细胞增殖,细胞亡和发育标记物的表达进行了分析.
主要成果:
- CaMKII 敲除和敲除导致缺陷的收延伸 (CE),其特征是未收的神经皮质和状细胞,异常的 somite 形成和身体轴缩短.
- 过度激活CaMKII导致CE缺陷,而主导负CaMKII表达导致中线分叉,表明CaMKII在细胞迁移中的关键作用.
- 发现CaMKII活动是CE期间细胞迁移所必需的,并且它部分挽救了Wnt11形态动物表型.
结论:
- 由特定的基因编码的循环激活的CaMKII对于使斑马鱼胃流动在收延伸 (CE) 过程中实现细胞迁移至关重要.
- 这些发现支持一种模型,其中CaMKII作为细胞运动的关键调节者,对适当的胚胎发育至关重要.
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