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Time-lapse Microscopy of Early Embryogenesis in Caenorhabditis elegans
Published on: August 25, 2011
鉴定早期C. elegans胚胎中细胞质局部化所需的基因
K J Kemphues1, J R Priess, D G Morton
1Section of Genetics and Development Cornell University Ithaca, New York 14853.
Cell
|February 12, 1988
概括
研究人员确定了四种基因 (par-1,par-2,par-3,par-4),这些基因对于C. elegans的早期胚胎发育至关重要. 突变破坏细胞分裂和P颗粒局部化,导致发育缺陷和致命性.
科学领域:
- 发育生物学是发展生物学.
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 母亲因素对于启动早期胚胎发育至关重要.
- 母性成分的细胞内定位指导非对称的细胞分裂和命运决定.
- 线虫C. elegans作为研究基本发育过程的模型生物.
研究的目的:
- 鉴定和描述涉及C. elegans早期胚胎发育对母体效应控制的基因.
- 了解这些基因在细胞质局部化和细胞命运决定中的作用.
- 研究这些基因突变对胚胎发育和生育能力的影响.
主要方法:
- 隔离和分析八个严格的母性效应突变.
- 基因分析以确定受影响的基因 (par-1,par-2,par-3,par-4).
- 突变胚胎的表型特征,包括裂变模式,时间,P颗粒定位和致命性.
主要成果:
- 四个基因 (par-1,par-2,par-3,par-4) 被确定为早期C. elegans胚胎中细胞质局部化至关重要.
- 突变导致裂变模式,时间和P颗粒定位的缺陷.
- 完全表达的突变导致缺少肠道细胞的胚胎致死性.
- 不完全表达的突变导致致命性和没有子孙的表型 (缺少生殖细胞).
结论:
- 对于C. elegans的早期胚胎发育而言,细胞内定位的母体编码系统至关重要.
- 这个系统的干扰会导致类缺陷,包括细胞分裂的改变,P颗粒的错位化和发育停止.
- 这些基因在胚胎发生过程中在建立细胞不对称性和细胞命运方面发挥着基本作用.
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