纳诺基,Oct4和Sox2编码区域的微RNAs调节胚胎干细胞分化
Yvonne Tay1, Jinqiu Zhang, Andrew M Thomson
1Stem Cell and Developmental Biology, Genome Institute of Singapore, Agency for Science Technology and Research, #08-01, Genome, 60 Biopolis Street, Singapore 138672, Singapore.
微RNAs (miRNAs) 针对基因中的编码序列,而不仅仅是未翻译的区域. 这一发现揭示了基因调节和特定物种miRNA活动的新机制.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 微RNAs (miRNAs) 是基因表达的关键调节者.
- 从历史上看,miRNA点被认为仅限于信使RNA (mRNA) 的3'未翻译区域 (UTR).
- 这种假设限制了对miRNA介导的基因调节的理解.
研究的目的:
- 研究特定基因的编码序列 (CDS) 中miRNA目标的存在和功能.
- 探索CDS定位的miRNA点在小鼠胚胎干细胞分化中的作用.
- 挑战miRNA-目标相互作用的传统模型.
主要方法:
- 对小鼠Nanog,Oct4和Sox2基因进行分析,以检测它们的CDS中的miRNA位.
- 使用位点定向突变发生的实验验证,以评估目标位点破坏的影响.
- 在miRNA介导的CDS向后观察细胞和表型变化.
主要成果:
- 在Nanog,Oct4和Sox2.2的CDS中识别了许多自然存在的miRNA点位.
- 证明特定的miRNAs (miR-134,miR-296,miR-470) 在干细胞分化过程中准这些CDS位点.
- 观察到特征差异化的转录和形态变化,突变阻止了这些效应.
结论:
- miRNA目标不仅限于3' UTR,而且在CDS中也很丰富.
- CDS定位的miRNA目标可以是特定物种的.
- 这扩展了已知的miRNA功能机制,支持基因调节的增强模型.
更多相关视频
10:48Differentiation of a Human Neural Stem Cell Line on Three Dimensional Cultures, Analysis of MicroRNA and Putative Target Genes
Published on: April 12, 2015
09:04Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies
Published on: April 22, 2017
相关概念视频
Embryonic Stem Cells
Combinatorial Gene Control
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
Embryonic Stem Cells
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...
Maintenance of the ES Cell State
Somatic to iPS Cell Reprogramming
Methods of Nuclear Reprogramming
