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相关概念视频

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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piRNA - Piwi-interacting RNAs02:57

piRNA - Piwi-interacting RNAs

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PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
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Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

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In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
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Master Transcription Regulators02:23

Master Transcription Regulators

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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相关实验视频

Updated: May 16, 2025

Visualization of Cell Cycle Variations and Determination of Nucleation in Postnatal Cardiomyocytes
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Visualization of Cell Cycle Variations and Determination of Nucleation in Postnatal Cardiomyocytes

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微RNA机制指导普金尼细胞规范的指令.

Norjin Zolboot1, Yao Xiao2, Jessica X Du1

  • 1Department of Neuroscience, The Scripps Research Institute, La Jolla, CA 92037, USA.

Neuron
|April 3, 2025
PubMed
概括
此摘要是机器生成的。

微RNAs (miRNAs) 对于大脑发育至关重要,驱动神经元亚型的规范. 这项研究揭示了特定miRNA在Purkinje细胞分化和识别中的关键作用.

关键词:
一个AGO2的AGO2这就是CLIP-seqq.普尔金尼细胞是什么?功能丧失 功能丧失 功能丧失绘制地图,绘制地图.微型RNA-目标网络微RNAs 是一个微型RNA.神经元的身份 神经元的身份转录后监管的规定.标签: 规格 规格 规格 规格 规格

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科学领域:

  • 神经科学是一个神经科学.
  • 分子生物学分子生物学
  • 遗传学 遗传学 是一个

背景情况:

  • 微RNAs (miRNAs) 是基因表达的重要调节者.
  • 它们在大脑发育过程中神经元亚型规范中的精确作用尚未完全理解.
  • 普尔金尼细胞 (PC) 差异化以前被认为是独立于miRNA调节的.

研究的目的:

  • 为了研究miRNAs在普尔金耶细胞 (PC) 差异化和身份中的作用.
  • 以高空间时分辨率剖析细胞类型特定的miRNA目标网络.
  • 识别PC发育的关键miRNA窗口,包括树突生成和合成生成.

主要方法:

  • 设计了用于高分辨率的miRNA功能时空分析的先进技术.
  • 使用快速和可逆的miRNA功能丧失模型.
  • 在罕见的细胞类型中开发了新的小鼠模型,用于miRNA-target网络映射.

主要成果:

  • 证明miRNAs对于普尔金耶细胞 (PC) 差异化是必要的.
  • 确定了对PC树突发生和协同发生至关重要的特定时间窗口.
  • 发现了由miR-206及其目标 (Shank3,Prag1,En2,Vash1) 调节的PC特定的转录后程序.

结论:

  • 通过miRNAs调节基因表达对于神经元亚型规范至关重要,超出了转录控制范围.
  • miR-206及其点在PC特异性树突发生和合成发生中发挥关键作用.
  • 通过miRNAs进行转录后调节对于建立神经元身份至关重要.