单细胞转录组学揭示了免疫细胞表达和拼接的双模性
Alex K Shalek1, Rahul Satija, Xian Adiconis
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
Nature
|May 21, 2013
概括
个体细胞表现出显著的基因表达差异. 单细胞RNA测序揭示了小鼠树突细胞中免疫基因表达和拼接模式的广泛双模变异.
科学领域:
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
- 细胞生物学 细胞生物学
背景情况:
- 一个群体内的单个细胞表现出显著的分子和功能多样性.
- 之前的研究受限于无法同时测量单细胞中的多个分子.
- 基因组分析方法现在可用于单细胞分析.
研究的目的:
- 用单细胞RNA测序研究小鼠骨髓衍生树突细胞 (BMDC) 的细胞异质性.
- 识别基因表达和拼接模式中以前未被观察到的变异.
- 了解细胞多样性背后的调节回路.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 的小鼠骨髓衍生的树突细胞 (BMDCs).
- 在特定的转录的验证中进行RNA-光 in situ杂交 (FISH).
- 在单个细胞中分析基因表达和拼接模式.
- 使用淘汰赛小鼠模型来研究调节电路.
主要成果:
- 在信使RNA的丰度和拼接模式中发现了广泛的,以前未被观察到的双模变异.
- 数百个关键的免疫基因表现出双模性表达,甚至是高度表达的基因.
- 拼接模式显示了单个细胞之间的显著异质性.
- 确定了一个由137个协同调节的抗病毒反应基因组成的模块.
- 该模块的变化与涉及Stat2和Irf7.7的干扰子反电路有关.
结论:
- 单细胞基因组学有力地揭示了功能多样性,并揭示了细胞状态和电路.
- 双向基因表达和拼接有助于BMDCs的细胞异质性.
- 干扰素反回路在传播基因表达变异方面发挥着作用.
相关概念视频
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Cell Specific Gene Expression
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
Cell Specific Gene Expression
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...

