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C C Mello¹, C Schubert, B Draper

¹Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington 98104, USA.

|August 22, 1996

概括

C. elegans 中的 pie-1 基因产生 PIE-1 蛋白质,这对于维持生殖系干细胞多能性至关重要. 细胞分裂期间PIE-1蛋白的局部化确保了生殖细胞保持不分化.

科学领域:

发育生物学发展生物学
干细胞生物学干细胞生物学
遗传学是一个遗传学.

背景情况:

在C. elegans中,全能生殖系芽细胞体通常抵抗体质分化线索.
母性基因 pie-1 中的突变导致胚胎细胞体采用体细胞命运,表明其关键作用.

研究的目的:

研究PIE-1蛋白在维持C. elegans.生殖系干细胞多能性的功能和局部化.
阐明 pie-1 保存生殖线芽细胞体未分化的机制.

主要方法:

在早期发育和细胞分裂过程中,在胚胎细胞体内分析PIE-1蛋白位址.
对 pie-1 突变的基因分析,以了解它们对细胞命运决定的影响.
对PIE-1蛋白的生物化学分析,包括识别潜在的功能动机.

主要成果:

pie-1基因编码了一种核蛋白,PIE-1,在早期发育过程中局部化到生殖细胞质体中.
在胚芽细胞分裂过程中,PIE-1分布不对称,留在未来胚芽细胞的子细胞的中心体中,并从体质子细胞中消失.
PIE-1蛋白含有指纹图案,类似于哺乳动物生长因子反应蛋白.

结论:

细胞分裂期间PIE-1的不对称局部化是保持生殖系干细胞多能性的关键机制.
PIE-1充当抑制剂,防止生殖系的体质分化.
这项研究为基于抑制剂的机制提供了一个模型,以维持特定血统中的干细胞多能性.

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