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Ex vivo Culturing of Whole, Developing Drosophila Brains
Published on: July 27, 2012
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发育调节的亚核基因组重组限制了Drosophila的神经祖先能力
Minoree Kohwi1, Joshua R Lupton, Sen-Lin Lai
1Institute of Neuroscience, Institute of Molecular Biology, Howard Hughes Medical Institute, University of Oregon, Eugene, OR 97403, USA.
Cell
|January 22, 2013
概括
随着时间的推移,干细胞失去创造早期细胞类型的能力. 在Drosophila中,背的基因是背的基因.
科学领域:
- 发育生物学是发展生物学.
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 干细胞和祖细胞连续产生不同的细胞类型.
- 原始人随着时间的推移,通过未知的机制失去确定早期命运的能力.
- 在 Drosophila 中,驼背 (Hb) 转录因子在神经前 (神经母细胞) 中指定早期神经元.
研究的目的:
- 研究Drosophila.原生能力丧失背后的机制.
- 了解驼背动物基因调节在神经细胞命运规范中的作用.
主要方法:
- 在体内免疫-DNA FISH 追踪基因位置.
- 对驼基因在核内重新定位的分析.
- 基因重新定位与蛋白质表达 (远距离天线 - Dan) 和祖先能力的相关性.
主要成果:
- 驼背基因移动到核外围,一个压制性隔间,因为神经细胞的能力被丢失了.
- 这种重新定位发生在转录终止数小时后,与远距离天线 (Dan) 下调相关.
- 延长丹表达或破坏板膜可以防止驼重新定位,并扩展神经细胞能力.
结论:
- 神经母细胞经历着发育调节的亚核基因组重组.
- 这种重组会永久地沉默巴的目标基因,从而导致祖先能力的丧失.
- 亚核基因定位是调节发育时间和细胞命运决定的关键机制.
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