人类和黑猩猩干细胞遗传依赖的比较
Richard She1, Tyler Fair2, Nathan K Schaefer3
1Whitehead Institute for Biomedical Research, Cambridge, MA, USA.
人类细胞具有独特的遗传依赖性影响繁殖,通过猿类CRISPR镜识别. 这些差异,特别是细胞周期基因,可能解释了人类大脑的进化.
科学领域:
- 进化生物学
- 基因组学
- 细胞和分子生物学
背景情况:
- 通过对大猿进行比较研究,
- 人类与其他人类之间的细胞和遗传差异尚不清楚.
研究的目的:
- 与其他猿类相比,研究人类细胞的不同遗传依赖性.
- 在人类进化过程中对细胞增殖产生特定物种影响的基因.
主要方法:
- 使用全基因组CRISPR干扰选方法进行了比较功能丧失.
- 在人类和黑猩猩多能干细胞中进行选,与猩猩细胞进行比较.
- 分析了对细胞增殖的特定物种影响,并确定了75个受影响的基因.
主要成果:
- 确定了75个对细胞增殖有特定物种影响的基因,包括细胞循环和 lysosomal 途径中的基因.
- 通过与猩猩细胞进行比较, 确定这些基因功能是人类衍生的.
- 在神经前细胞和大脑器官中观察到对CDK2和CCNE1耗尽的特定人体强度.
结论:
- 人类细胞的进化变化改变了基本基因的格局.
- 支持G1阶段长度假设作为人类大脑扩张的机制.
- 建立了一个系统地揭示物种之间的细胞和分子差异的平台.
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