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用于多重复原始编辑的百科病毒载体组装
Francesco Aulicino1, Renata A Raele1, Alexandra Harrison1
1School of Biochemistry, University of Bristol, Bristol, UK.
Methods in molecular biology (Clifton, N.J.)
|July 1, 2024
概括
在哺乳动物细胞中,高效的原始编辑 (PE) 需要提供多个组件. 研究人员开发了一种baculovirus (BV) 载体协议,以克服无基因组重写的交付挑战,而无需DNA双链断裂 (DSB).
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物技术是生物技术.
背景情况:
- 克里斯普尔技术可以进行基因组编辑,但需要有效地传递多个遗传组件.
- 主编辑 (PE) 提供了精确的基因组重写,而不会诱导DNA双链断裂 (DSB).
- 传统的病毒载体具有有限的载荷能力,阻碍了像PE.PE这样的先进编辑技术的高效交付.
研究的目的:
- 在哺乳动物细胞中开发一种用于多重原始编辑的新型传递系统.
- 为了克服病毒载体包装能力的局限性,主要编辑组件.
- 建立一个用于组装适合哺乳动物细胞转导和PE的baculovirus (BV) 载体的协议.
主要方法:
- 用于多重编辑原始编辑的 baculovirus (BV) 载体组装.
- 利用baculovirus的大型合成DNA容量携带多个遗传有效载荷.
- 用开发的baculovirus载体对哺乳动物细胞进行转导,用于主要编辑应用.
主要成果:
- 展示了一种用于创建 baculovirus 载体的协议,用于多重化质量编辑.
- 通过使用baculovirus载体成功转导哺乳动物细胞.
- 促进主要编辑所需的多个遗传组件的高效交付.
结论:
- 百科病毒载体提供了一个可行的解决方案,可以在哺乳动物细胞中提供多个组件进行原始编辑.
- 这种方法克服了传统病毒载体的包装限制,用于先进的基因组编辑.
- 开发的协议使用主要编辑技术实现了高效和无的基因组重写.
相关概念视频
What are Viruses?
Overview
Viral Structure
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
Retrovirus Life Cycles
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
Viral Recombination
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
Retroviruses
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
Viruses with RNA Genomes
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...

