在哺乳动物基因组中进行有针对性,可编程和精确的协奏复制
Yaoge Jiao1, Min Li1, Xingyu He1
1Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
Genome research
|June 9, 2023
概括
研究人员通过主要编辑 (TD-PE) 开发了并行重复,以精确地模拟基因组变异. 这种新的遗传工具准确地创建双重复制,帮助研究遗传疾病和癌症.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 基因工程是一种基因工程.
背景情况:
- 双重复制是常见的基因组改变,与疾病和癌症有关.
- 目前的遗传工具很难准确地模拟这些变异,这阻碍了研究.
- 了解合重复对于推进遗传疾病和癌症研究至关重要.
研究的目的:
- 开发一种新的遗传工具,用于在哺乳动物基因组中创建有针对性和精确的协奏复制.
- 克服模拟并联重复现有方法的局限性.
- 建立一个可编程的策略来研究合重复的表型后果.
主要方法:
- 开发了一种名为"通过主要编辑 (TD-PE) 进行并行重复"的策略.
- 使用了一对用于特定编辑和ssDNA初始化而设计的转原始编辑指导RNA (pegRNAs).
- 工程逆转录酶 (RT) 模板用于同源的重和片段重复.
主要成果:
- TD-PE成功地创建了精确的基因组片段 (50bp到10kb) 在现场并行重复,效率高达28.33%.
- 通过微调pegRNAs实现了同时的目标重复和片段插入.
- 通过生成多个与疾病相关的并联重复来证明该工具的实用性.
结论:
- 在哺乳动物基因组中,TD-PE提供了一种强大,可编程和精确的方法来产生合重复.
- 这种工具有助于研究双重复制在遗传疾病和癌症中的作用.
- TD-PE代表了涉及结构变异的遗传研究的重大进步.
相关概念视频
Conservative Site-specific Recombination and Phase Variation
6.0K
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
6.0K
Gene Duplication and Divergence
6.2K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.2K
Replication in Eukaryotes
171.0K
Overview
171.0K
Introduction to Nuclear Reprogramming
2.0K
Nuclear reprogramming is the process of switching gene expression of one cell type to that of another cell type, usually from a differentiated cell state to an undifferentiated cell state. Differentiation occurs during processes such as development and morphogenesis, tissue regeneration, and malignancy. Cells can also be artificially induced to reprogram their gene expression by techniques such as nuclear transfer, induced pluripotency, and cell fusion. Such techniques have many applications in...
2.0K
Homologous Recombination
50.7K
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
50.7K
Methods of Nuclear Reprogramming
1.8K
Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
1.8K


