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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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MicroRNAs01:22

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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...
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RNA Splicing01:32

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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...
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Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
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Nonsense-mediated mRNA Decay02:27

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The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
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相关实验视频

Updated: Jan 18, 2026

A Reporter Assay to Analyze Intronic microRNA Maturation in Mammalian Cells
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在神经癌细胞中,螺旋酶组相关微RNA的核作用

Shelly Mahlab-Aviv1, Keren Or Swissa2, Maram Arafat2

  • 1Department of Biological Chemistry, The Life Science Institute, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

International journal of molecular sciences
|September 13, 2025
PubMed
概括

核微RNA (miRNA) 在神经癌细胞中起着至关重要的作用,调节基因表达和进展. 这项研究揭示了这些重要的分子的新型核功能和点.

关键词:
这是一种反意义的反意义.在ncRNA中,我们可以微型的癌症这就是miRNA生物生成的原因.核miRNA核miRNA是什么意思这是一个前-miRNA.这是一种spliceosomal-miRNA.拼接 拼接 拼接 拼接

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相关实验视频

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科学领域:

  • 分子生物学分子生物学
  • 癌症研究 癌症研究
  • 神经科学是一个神经科学.

背景情况:

  • 微RNAs (miRNAs) 主要调节细胞质中的基因翻译.
  • 毫米RNA的核作用,特别是与结合体相关的核作用,在很大程度上是未知的.
  • 之前的工作将结合酶组相关的miRNA与乳腺癌转移联系起来.

研究的目的:

  • 在神经元癌症模型中研究结合体相关的miRNAs的核功能.
  • 确定新的核目标和监管机制.
  • 探索核miRNAs的取决于上下文的作用.

主要方法:

  • 利用了人类皮层神经元 (HCN) 细胞.
  • 使用的质母细胞瘤 (U87MG) 和神经母细胞瘤 (SH-SY5Y) 细胞系.
  • 分析了与核目标的miRNA相互作用,包括长非编码RNA.

主要成果:

  • 结合体相关的miRNA被确定为神经元癌细胞中的标记物.
  • 发现了这些miRNA的新型核标.
  • 发现miR-99b可以通过5'拼接接处的基配对来提高SPACA6-AS1前mRNA水平.
  • 一些miRNAs显示了对立的核与细胞质调节效应.

结论:

  • 核miRNAs在基因调节中具有多样化和上下文依赖的功能.
  • 这些发现扩大了miRNAs已知的调节作用,超出了细胞质.
  • 核miRNAs代表了理解和治疗脑癌的潜在目标.