单细胞RNA-seq揭示了哺乳动物细胞中动态的,随机的单单基因基因表达
Qiaolin Deng1, Daniel Ramsköld, Björn Reinius
1Ludwig Institute for Cancer Research, Box 240, 171 77 Stockholm, Sweden.
概括
哺乳动物细胞表现出丰富的随机单基因基因表达,其中只有两个基因拷贝中的一个是活跃的. 这在单个细胞中独立且动态地发生,即使在成熟的组织中也是如此.
科学领域:
- 基因组学就是基因组学.
- 发展生物学 发展生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 二倍体细胞通常表现出两种基因等位基因的表达.
- 单个细胞中的全基因组基因表达模式在很大程度上仍然没有特征.
研究的目的:
- 为了研究单个小鼠胚胎细胞中的全基因组基表达模式.
- 为了确定单基因基因表达的流行率和动态.
主要方法:
- 来自混合遗传背景的小鼠植入前胚胎的单细胞分析 (CAST/EiJ × C57BL/6J).
- 全球评估自体和X染色体等位基因表达.
主要成果:
- 丰富的单样基因表达 (12-24%) 观察到自体基因.
- 发现基表达在密切相关的细胞中是独立的,随机的和动态的.
- 证明了父亲X染色体的新活化.
- 在成熟细胞中检测到类似的单基表达模式.
结论:
- 独立和随机的基转录驱动了哺乳动物细胞中丰富的随机单基表达.
- 基表达是一种动态的过程,即使在邻近的细胞之间也存在显著的变化.
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