KaryoCreate:一种基于CRISPR的技术,通过向人类中位素来研究染色体特异性形
Nazario Bosco1, Aleah Goldberg1, Xin Zhao1
1Institute for Systems Genetics and Department of Biochemistry and Molecular Pharmacology, NYU Langone Health, New York, NY, USA.
Cell
|April 19, 2023
概括
研究人员开发了基于CRISPR的技术KaryoCreate,用于设计特定的染色体增量或损失 (无倍积分). 这种工具有助于研究癌症和其他疾病,通过创建受控的形细胞模型.
科学领域:
- 遗传学和基因组学
- 癌症生物学
- 分子生物学
背景情况:
- 染色体数量改变的特征是癌细胞的常见特征.
- 对于癌症研究来说,了解特定形瘤的功能后果至关重要.
研究的目的:
- 介绍KaryoCreate,一种用于生成染色体特异性的新型CRISPR工程系统.
- 验证KaryoCreate在诱导染色体错误分离方面的效率和特异性.
- 通过结肠上皮细胞作为模型,研究特定形瘤在癌症进展中的作用.
主要方法:
- KaryoCreate使用与突变KNL1结合的染色体特异性sgRNA和dCas9的联合表达.
- sgRNAs针对染色体特异性误分的CENPA结合的α卫星重复.
- 在细胞模型中验证了基于CRISPR的系统来诱导染色体的增加和减少.
主要成果:
- KaryoCreate成功地产生了染色体特异性体,平均效率为8%的增益和12%的损失.
- 这项技术在10种不同的染色体上得到了验证.
- 结肠细胞中的染色体18q损失诱导了对TGF-β的耐药性,与半性基因缺失有关.
结论:
- KaryoCreate是一项创新的技术,用于创建和研究染色体错误分离和积.
- 这种系统为研究形积分在癌症和其他生物环境中的作用提供了强大的工具.
- 特定的形状,如18q损失,可以驱动癌症表型,如耐药性.
更多相关视频
09:04Generation of Defined Genomic Modifications Using CRISPR-CAS9 in Human Pluripotent Stem Cells
Published on: September 25, 2019
8.3K
10:07A Standard Methodology to Examine On-site Mutagenicity As a Function of Point Mutation Repair Catalyzed by CRISPR/Cas9 and SsODN in Human Cells
Published on: August 25, 2017
7.9K
相关概念视频
01:59CRISPR
52.5K
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...
52.5K
01:17Karyotyping
62.0K
Overview
62.0K
02:30Histone Variants at the Centromere
4.4K
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
4.4K
01:28CRISPR/Cas9 Genome Editing
82
The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
82
02:31Homologous Recombination
50.8K
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...
50.8K