缺少质细胞:一种控制质与神经元命运的遗传开关
B W Jones1, R D Fetter, G Tear
1Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley 94720, USA.
Cell
|September 22, 1995
概括
缺少的质细胞 (gcm) 基因充当二元开关,决定Drosophila发育中的细胞命运. 它的存在将神经元转化为质细胞,而它的缺席则导致质细胞成为神经元.
科学领域:
- 发展生物学 发展生物学
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 在Drosophila中缺少的质细胞 (gcm) 基因对于质细胞分化至关重要.
- 几乎所有质前体中都观察到GCM的早期发育表达模式.
研究的目的:
- 研究质细胞缺失 (gcm) 基因作为细胞命运决定中的二进制遗传开关的作用.
- 了解GCM如何调节神经元与神经元之间的质细胞的分化.
主要方法:
- 对Drosophila中功能丧失的gcm突变等位基因的分析.
- 使用转基因构造用于子宫外表达的功能增益gcm条件的检查.
- 在周围神经系统 (PNS) 中观察细胞分化.
主要成果:
- 在gcm中失去功能的突变导致几乎所有质细胞的分化失败.
- 在gcm突变体中,PNS中的质细胞转化为神经元.
- 宫外表达的gcm将许多假定神经元转化为质细胞.
结论:
- 缺失的质细胞 (gcm) 基因作为二进制遗传开关,决定了质细胞和神经元之间的细胞命运.
- Gcm蛋白质的存在促进了神经元到质细胞的转化,而它的缺失则促进了质细胞到神经元的转化.
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