NAT GENET:CRISPR基因编辑存在潜在致癌性

2020-05-19 MedSci原创 MedSci原创

对42个细胞系对的遗传学表征表明,Cas9的引入会导致p53-失活突变的出现和扩大。

Cas9通常被引入细胞系中,以实现CRISPR-Cas9介导的基因组编辑。最近,研究人员对Cas9表达本身的遗传和转录后果进行了探究。

对165对人类癌症细胞系及其Cas9表达的衍生物进行了基因表达谱分析,研究人员发现在引入Cas9后,p53通路有所上调,特别是在野生型TP53(TP53-WT)细胞系中。这在信使RNA和蛋白质水平上得到了证实。

此外,在Cas9表达的细胞系中观察到DNA修复水平的升高。对42个细胞系对的遗传学表征表明,Cas9的引入会导致p53-失活突变的出现和扩大。这一点在同源TP53-WT和TP53-null(TP53-/-)细胞系的竞争实验中得到了证实。

最后,Cas9在TP53-WT中的活性比在TP53-突变体细胞系中的活性低,而且Cas9诱导的p53通路激活影响了细胞对遗传和化学干扰的敏感性。

这些发现可能对CRISPR-Cas9介导的基因组编辑的正确使用有广泛的影响。

 

原始出处:

Oana M. Enache et al. Cas9 activates the p53 pathway and selects for p53-inactivating mutations. Nature Genetics. 2020. 

 

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    2020-09-04 liye789132251
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    2020-12-20 cy0324
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    2020-06-06 canlab
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    2020-05-21 yuandd
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    2020-05-21 jambiya

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