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相关概念视频

DNA Isolation01:24

DNA Isolation

DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
Sanger Sequencing01:57

Sanger Sequencing

DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
Restriction Enzymes01:11

Restriction Enzymes

Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...

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相关实验视频

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Targeted DNA Methylation Analysis by Next-generation Sequencing
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基于酶的新型减少表示方法,用于使用低投入的DNA甲基化概况.

Qianli Liu1,2, Kathryn A Helmin1, Zachary D Dortzbach1

  • 1Division of Pulmonary and Critical Care Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, United States.

Nucleic acids research
|June 30, 2025
PubMed
概括

减少表示酶甲基化测序 (RREM-seq) 能够从低输入样本中准确地定制DNA甲基化概况. 这种方法克服了传统二硫酸盐测序的局限性,即使使用最小的DNA,也提供了更高的覆盖率和可靠的结果.

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科学领域:

  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
  • 基因组学就是基因组学.
  • 分子生物学分子生物学

背景情况:

  • 基于二硫酸盐的DNA甲基化测序方法可以降解DNA,特别是在低输入样本中,损害数据质量.
  • 酶甲基化测序 (EM-seq) 提供了一种更少偏见的替代方案,改善了基因组覆盖范围.
  • 减少代表性的方法通过丰富CpG丰富的地区来提高效率和成本效益.

研究的目的:

  • 为减少表示方法 (RREM-seq) 调整酶甲基化测序技术.
  • 为了从低输入样本中实现DNA甲基化分析.
  • 将RREM-seq性能与减少表示双硫酸盐测序 (RRBS) 进行比较.

主要方法:

  • 开发并实施了减少表示EM-seq (RREM-seq) 协议.
  • 使用不同数量的小鼠和人类DNA将RREM-seq与RRBS进行比较.
  • 分析了小鼠T细胞群和人类临床样本中的DNA甲基化概况.

主要成果:

  • 在<2 ng DNA的情况下,RRBS失败了,而RREM-seq成功地从1-25 ng DNA生成了库.
  • 低输入的RREM-seq库显示了>10倍的监管基因组元素覆盖率比RRBS.
  • 在严重的SARS-CoV-2肺炎患者中,RREM-seq检测到T细胞群之间的甲基化差异.

结论:

  • RREM-seq是一种可靠的方法,用于低输入样本的DNA甲基化概况.
  • 该技术提供单核酸分辨率和增强的基因组覆盖范围.
  • RREM-seq适用于临床样本和推进表观遗传研究.