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Mouse Oocyte Microinjection, Maturation and Ploidy Assessment
Published on: July 23, 2011
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通过器官丰富,小鼠卵细胞与姐妹囊胚细胞分化
1Howard Hughes Medical Institute Research Laboratories, Department of Embryology, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA. spradling@ciwemb.edu leile@med.umich.edu.
Science (New York, N.Y.)
|February 27, 2016
概括
鼠标卵细胞通过从生殖细胞中的姊妹细胞中接收细胞器,形成巴尔比亚尼体. 这种器官运输对卵细胞分化至关重要,而其破坏导致胚胎细胞死亡.
科学领域:
- 发育生物学
- 细胞生物学
- 生殖生物学
背景情况:
- 卵细胞分化涉及从生殖细胞或结核细胞中接收细胞器和细胞质.
- 胚胎细胞在哺乳动物生殖过程中的具体作用仍然很大程度上是未知的.
- 了解这些过程是生殖健康和发育研究的关键.
研究的目的:
- 调查生殖细胞囊在小鼠生殖过程中的作用.
- 阐明卵细胞发育过程中的器官转移和巴尔比安尼体的机制.
- 确定细胞质和器官运输在哺乳动物卵细胞分化中的功能重要性.
主要方法:
- 对小鼠原始生殖细胞和生殖细胞囊的观察.
- 使用微管依赖运输抑制剂来研究细胞器的运动.
- 对Balbiani体形成的分析和卵细胞命运的确定.
- 在器官转移过程中研究膜动态和类似细胞灭绝的过程.
主要成果:
- 鼠标的生殖细胞从邻近的囊细胞中接收器官,形成巴尔比亚尼体,并分化为卵细胞.
- 没有获得足够的细胞器的类似护士的生殖细胞会经历类似细胞灭绝的细胞死亡.
- 微管依赖的运输对于器官细胞的移动,巴尔比亚尼体的形成和卵细胞命运至关重要.
- 膜分解和类似细胞亡的事件伴随着器官转移,类似于Drosophila护士细胞倾倒.
结论:
- 细胞质和器官运输对于哺乳动物卵细胞的分化至关重要.
- 这些运输机制似乎在进化过程中得到了保护.
- 这些发现突出了胚胎细胞在通过细胞间传输支持卵细胞发育中的新角色.
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