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CRISPR/Cas9 筛选用于在癌细胞中全基因组研究 MYC 结合的 E 盒的必需性。

CRISPR/Cas9 screen for genome-wide interrogation of essential MYC-bound E-boxes in cancer cells.

机构信息

Institute of Human Genetics, Polish Academy of Sciences, Poznań, Poland.

Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznań, Poland.

出版信息

Mol Oncol. 2023 Nov;17(11):2295-2313. doi: 10.1002/1878-0261.13493. Epub 2023 Aug 7.

DOI:10.1002/1878-0261.13493
PMID:37519063
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10620128/
Abstract

The transcription factor MYC is a proto-oncogene with a well-documented essential role in the pathogenesis and maintenance of several types of cancer. MYC binds to specific E-box sequences in the genome to regulate gene expression in a cell-type- and developmental-stage-specific manner. To date, a combined analysis of essential MYC-bound E-boxes and their downstream target genes important for growth of different types of cancer is missing. In this study, we designed a CRISPR/Cas9 library to destroy E-box sequences in a genome-wide fashion. In parallel, we used the Brunello library to knock out protein-coding genes. We performed high-throughput screens with these libraries in four MYC-dependent cancer cell lines-K562, ST486, HepG2, and MCF7-which revealed several essential E-boxes and genes. Among them, we pinpointed crucial common and cell-type-specific MYC-regulated genes involved in pathways associated with cancer development. Extensive validation of our approach confirmed that E-box disruption affects MYC binding, target-gene expression, and cell proliferation in vitro as well as tumor growth in vivo. Our unique, well-validated tool opens new possibilities to gain novel insights into MYC-dependent vulnerabilities in cancer cells.

摘要

转录因子 MYC 是一种原癌基因,在多种癌症的发病机制和维持中具有明确的重要作用。MYC 结合基因组中的特定 E 盒序列,以细胞类型和发育阶段特异性的方式调节基因表达。迄今为止,对不同类型癌症生长重要的必需 MYC 结合 E 盒及其下游靶基因的综合分析尚不存在。在这项研究中,我们设计了一个 CRISPR/Cas9 文库,以在全基因组范围内破坏 E 盒序列。同时,我们使用 Brunello 文库敲除编码蛋白的基因。我们在四个依赖 MYC 的癌细胞系(K562、ST486、HepG2 和 MCF7)中进行了这些文库的高通量筛选,揭示了几个必需的 E 盒和基因。其中,我们确定了与癌症发展相关途径中涉及的关键共同和细胞类型特异性 MYC 调节基因。对我们方法的广泛验证证实,E 盒的破坏会影响 MYC 结合、靶基因表达和体外细胞增殖以及体内肿瘤生长。我们独特的、经过良好验证的工具为深入了解癌细胞中依赖 MYC 的脆弱性提供了新的可能性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/e1df8604d43e/MOL2-17-2295-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/c69f3b2c746e/MOL2-17-2295-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/781d0b4c69a2/MOL2-17-2295-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/0ef7bd9faeea/MOL2-17-2295-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/6699b655c378/MOL2-17-2295-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/674fdf1d8e42/MOL2-17-2295-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/e1df8604d43e/MOL2-17-2295-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/c69f3b2c746e/MOL2-17-2295-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/781d0b4c69a2/MOL2-17-2295-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/0ef7bd9faeea/MOL2-17-2295-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/6699b655c378/MOL2-17-2295-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/674fdf1d8e42/MOL2-17-2295-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/690e/10620128/e1df8604d43e/MOL2-17-2295-g004.jpg

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