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相关概念视频

RNA Splicing01:32

RNA Splicing

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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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Alternative RNA Splicing02:18

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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...
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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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RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
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Evaluation of Exon Inclusion Induced by Splice Switching Antisense Oligonucleotides in SMA Patient Fibroblasts
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修复突变的NF1mRNA与跨剪切组I内部 ribozymes 的修复.

André Leier1, Xu Han2, Jehanne Aghzadi2

  • 1Department of Genetics, University of Alabama at Birmingham, Birmingham, AL 35294, USA.

Cancers
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概括

研究人员探索了RNA转链拼接来修复神经纤维素瘤I型 (NF1) mRNA变体. 这项研究确定了特定的拼接部位和增强的 ribozyme 序列,用于潜在的 NF1 RNA 修复策略.

关键词:
神经纤维素瘤 I 类型泰特拉希米纳热 (Tetrahymena thermophila) 是一种热的植物.延伸指南序列的延伸指南序列.组I 内子 组I 内子这就是 hNF1NF1.mNf1 的时间.里博酶里博酶是什么意思通过拼接进行跨拼接.

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科学领域:

  • 分子生物学分子生物学
  • 在RNA治疗方面,RNA疗法.
  • 遗传医学是一种遗传医学.

背景情况:

  • 神经纤维素瘤 I 型 (NF1) 是一种由 NF1 基因中的致病变异引起的遗传疾病.
  • 目前的治疗方法侧重于控制症状,但纠正潜在的遗传缺陷提供了一个有希望的治疗途径.
  • RNA转接是一个新兴的转录修复策略,最近FDA批准的药物进入临床试验.

研究的目的:

  • 研究来自Tetrahymena thermophila的转接组I内 ribozymes的潜力,以修复致病性NF1 (pre-) mRNA变体.
  • 通过替换NF1mRNA的3'-尾部来实现这一目标.

主要方法:

  • 在NF1mRNA上的拼接部位的计算识别和生物化学验证.
  • 通过组合实验识别可提高酶效率的扩展指导序列 (EGS).

主要成果:

  • 该研究成功验证了设计的 ribozyme 的正确转接产品.
  • 在HEK293 NF1-/-细胞中进行了验证,这些细胞被设计成表达mNf1.1.

结论:

  • 为NF1mRNA修复建立了一个功能拼接部位和增强活动的延长导向序列.
  • 进一步优化 ribozyme 设计和传递方法是必要的,以建立基于 ribozyme 的 RNA 修复作为 NF1.1 的可行的治疗策略.