Highly efficient and precise base editing by engineered dCas9-guide tRNA adenosine deaminase in rats.

Highly efficient and precise base editing by engineered dCas9-guide tRNA adenosine deaminase in rats.
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通过工程化的 dCas9 引导 tRNA 腺苷脱氨酶在大鼠体内进行高效、精确的碱基编辑。

DOI:
10.1038/s41421-018-0047-9
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发表时间:
2018
期刊:
影响因子:
33.5
通讯作者:
Zhang L
Zhang L
中科院分区:
生物学1区
文献类型:
--
作者:
Ma Y;Yu L;Zhang X;Xin C;Huang S;Bai L;Chen W;Gao R;Li J;Pan S;Qi X;Huang X;Zhang L

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大鼠是了解糖尿病、高血压和神经系统疾病等人类疾病机制的参考实验室动物模型1,2。CRISPR/Cas9系统已被证明是产生基因修饰大鼠的有效且灵活的工具3-6。已经做出了很大的努力来减少副作用并扩展该系统的应用7-10。胞嘧啶碱基编辑器(CBE),其包含具有CRISPR/Cas9的工程化胞嘧啶脱氨酶,可用于修饰哺乳动物基因组DNA而不诱导双链DNA断裂或模板。CBE通过诱导C· G到T· A的转化来靶向序列,窗口约为5个核苷酸11。最近,同一个小组开发了一种新的dCas 9-guide tRNA腺苷脱氨酶,它能够诱导A· T转化为G· C。与CBE一起,ABE使得能够在靶基因组序列12中引入所有四种核苷酸转换(C至T、A至G、T至C和G至A)。与野生型CRISPR/Cas9系统相比,这些碱基编辑工具为人类疾病的基因校正提供了更安全的方法。在这里,我们报告这种新开发的腺嘌呤碱基编辑器在大鼠碱基编辑中的应用。
Dear Editor Rats are reference laboratory animal models for understanding mechanism of human diseases such as diabetes, hypertension, and neurological disorder 1, 2. CRISPR/Cas9 system has proved an efficient and flexible tool to generate gene modified rats 3–6. Great efforts have been made to reduce the side effects and extend the application of this system 7–10. Cytosine base editor (CBE), containing the engineered cytosine deaminase with CRISPR/Cas9 can be used to modify mammal genomic DNA without induction of double-strand DNA break or template. CBE targets sequence by inducing C· G to T· A conversion with a window of approximately five nucleotides 11. Recently, the same group developed a new dCas9-guide tRNA adenosine deaminase which was capable of inducing A· T to G· C conversion. Together with CBE, ABE enables introduction of all four nucleotides transitions (C to T, A to G, T to C, and G to A) in target genomic sequence 12. These base-editing tools provide a much safer approach compared with wild-type CRISPR/Cas9 system for gene correction of human disease. Here we report the application of this newly developed adenine base editors in rat base editing.
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