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活跃的核定位和actomyosin收缩性在发生性腺体的过程中保持领导细胞的完整性
Priti Agarwal1, Simon Berger2, Tom Shemesh3
1Department of Cell and Developmental Biology, Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
核中的核.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学是发展生物学.
- 生物物理学的生物物理.
背景情况:
- 正确的器官分布对细胞运动至关重要.
- 在Cayenorhabditis elegans远端细胞 (DTC) 的核在发生性腺形态发生过程中是前部局部化的,但原因尚不清楚.
研究的目的:
- 阐明维护核定位在DTC中的分子机制.
- 调查核定位在C. elegans性腺发育过程中的功能意义.
主要方法:
- 确定了KASH蛋白UNC-83作为核和kinesin-1.1之间的连接器.
- 利用基因淘汰和实时成像来观察破坏核定位和actomyosin收缩性的影响.
- 开发了一个生物物理模型来理解细胞力学.
主要成果:
- UNC-83将核与kinesin-1连接起来,用于积极的核定位.
- 破坏核定位本身对性腺形态发生没有影响.
- 结合核错位和降低了actomyosin收缩性,导致DTC分裂和性腺分叉.
- 在U转动过程中观察到DTC分裂成核细胞和无核细胞.
- 无核细胞体显示出暂时的生殖细胞支持.
结论:
- 领导细胞使用活跃的核定位 (通过微管电机) 和actomyosin收缩性来实现完整性和形态发生.
- 这些互补的机械策略使复杂的3D环境中的导航成为可能.
- 核定位对于在C. elegans淋巴体发育过程中防止细胞分裂至关重要.
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