相关实验视频

Updated: Jun 20, 2025

Selection-dependent and Independent Generation of CRISPR/Cas9-mediated Gene Knockouts in Mammalian Cells

Selection-dependent and Independent Generation of CRISPR/Cas9-mediated Gene Knockouts in Mammalian Cells

Published on: June 16, 2017

通过核酸介导的CRISPR-Cas9的酸调节特异性

Kelly E W Carufe^1,2, Nicholas G Economos^1,2,3, Peter M Glazer^1,2

¹Department of Therapeutic Radiology, Yale School of Medicine, New Haven, Connecticut, USA.

Nucleic acid therapeutics

|July 22, 2024

概括

合成核酸 (PNA) 通过向指导RNA,增强CRISPR-Cas9基因编辑特异性高达10倍. 这提高了人类治疗和异位基因特异性疾病治疗的精度.

科学领域:

分子生物学分子生物学
生物技术是生物技术.
基因工程是一种基因工程.

背景情况:

克里斯普尔-Cas9基因疗法具有广泛的应用,但需要增强的特异性.
非目标突变和治疗单核酸差异疾病的挑战限制了当前的CRISPR-Cas9技术.
提高Cas9的特异性对于推进基于人类的基因疗法至关重要.

研究的目的:

开发一种使用合成核酸 (PNA) 增加CRISPR-Cas9特异性的方法.
评估PNA修改 (长度,结合点,同质性) 对Cas9特异性的影响.
探索由PNA引导的Cas9.9启用的等位基因特异性基因编辑能力.

主要方法:

合成核酸 (PNA) 旨在将特定序列与指导RNA (gRNA) 结合.
测试了PNA长度的变化,与原空间体相邻动机 (PAM) 相对的结合位置以及同质性的变化.
Cas9的特异性在针对性/非针对性和基因特异性编辑上下文中进行了评估.

主要成果:

PNAs显著增加了Cas9的特异性,达到高达10倍的增强.
在PAM位点远处的gRNA区域结合PNAs有效提高了特异性.
在PAM近位区域的PNAs有故意的不匹配,允许对Cas9活动的等位基因特异调节.

结论:

酸核酸是提高CRISPR-Cas9特异性和精度的有希望的策略.
这种方法解决了当前基因编辑技术的局限性,特别是在治疗应用中.
这些发现为更准确,更有效的基于CRISPR的基因疾病治疗铺平了道路.

关键词:

这就是CRISPR-Cas9的特征.一个等位基因的特异性远离目标 - 远离目标酸核酸的核酸是什么?监管监管监管监管监管监管特殊性的特异性

更多相关视频

CRISPR Epigenome Editing in Human Cells using Plasmid DNA Transfection and mRNA Nucleofection Delivery

CRISPR Epigenome Editing in Human Cells using Plasmid DNA Transfection and mRNA Nucleofection Delivery

Published on: May 30, 2025

CRISPR Gene Editing Tool for MicroRNA Cluster Network Analysis

CRISPR Gene Editing Tool for MicroRNA Cluster Network Analysis

Published on: April 25, 2022

相关概念视频

CRISPR

CRISPR

Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...

CRISPR and crRNAs

CRISPR and crRNAs

Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...

Conservative Site-specific Recombination and Phase Variation

Conservative Site-specific Recombination and Phase Variation

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...

Homologous Recombination

Homologous Recombination

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...