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相关概念视频

lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

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In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
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Types of RNA01:20

Types of RNA

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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
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Ribosome Profiling02:24

Ribosome Profiling

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Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
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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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相关实验视频

Updated: Jul 12, 2025

CRISPR Gene Editing Tool for MicroRNA Cluster Network Analysis
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对长非编码RNA的突变密度分析揭示了与蛋白质编码RNA和预后值相似的模式.

Troy Zhang1, Hui Yu1, Yongsheng Bai2

  • 1Department of Public Health and Sciences, Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL 33136, USA.

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|October 20, 2023
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概括

长非编码RNAs (lncRNAs) 显示突变密度模式类似于癌症中的蛋白质编码信使RNAs (mRNAs). 这一发现突显了lncRNA突变在癌症研究中的潜在作用.

关键词:
长长的非编码RNA.突变密度 突变密度 突变密度 突变密度突变链偏差 突变链偏差转录 开始 网站 转录 网站

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科学领域:

  • 基因组学就是基因组学.
  • 癌症生物学 癌症生物学
  • 分子瘤学分子瘤学

背景情况:

  • 基因组研究传统上侧重于蛋白质编码基因中的突变和基因表达.
  • 基因组技术和计算方法的进步扩大了研究范围,包括突变密度和非编码RNA.
  • 与非编码RNA,特别是长非编码RNA (lncRNA) 进行突变密度分析的整合仍然未被探索.

研究的目的:

  • 为了研究跨不同癌症类型的长非编码RNA (lncRNA) 突变密度模式.
  • 将lncRNA突变模式与蛋白质编码信使RNA (mRNA) 的突变模式进行比较.
  • 探索 lncRNA 突变模式,转录链偏差和患者预后之间的关联.

主要方法:

  • 在80个癌症队列中分析了57种癌症类型的lncRNA突变密度模式.
  • 将lncRNA突变模式与蛋白质编码mRNA突变模式进行比较.
  • 转录链偏差的统计分析及其与预后的相关性,使用Log Odds Ratio度量.

主要成果:

  • lncRNAs表现出类似于蛋白质编码mRNAs的突变密度模式,包括转录开始地点附近的峰值和下降.
  • 在许多队列中观察到具有统计意义的转录链偏差,无论是lncRNA还是mRNA.
  • 某些转录链偏差与患者的预后有关,可能与转录合修复机制有关.

结论:

  • 这项研究是首次将突变密度模式与lncRNA突变结合起来.
  • lncRNAs表现出与蛋白质编码mRNAs相似的突变模式,这强调了它们在癌症中的重要性.
  • 这些发现表明,lncRNAs在癌症的发展和进展中起着至关重要的作用,需要进一步研究.