Evaluation of OPEN zinc finger nucleases for direct gene targeting of the ROSA26 locus in mouse embryos.

Evaluation of OPEN zinc finger nucleases for direct gene targeting of the ROSA26 locus in mouse embryos.
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DOI:
10.1371/journal.pone.0041796
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Pelczar P
Pelczar P
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hermann M;Maeder ML;Rector K;Ruiz J;Becher B;Bürki K;Khayter C;Aguzzi A;Joung JK;Buch T;Pelczar P

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锌指核酸酶(ZFN)可以在各种生物和细胞类型中进行精确的基因组修饰。商业ZFN被报道直接在小鼠受精卵中增强基因靶向,而使用公共可用资源的类似方法尚未被描述。在这里,我们报告了使用寡聚化池工程(OPEN)ZFN对小鼠基因组进行精确的靶向突变。开放式ZFN可以使用公开可用的资源来构建,因此为学术研究人员提供了一个有吸引力的替代方案。通过开放选择获得了两对针对小鼠基因组GT(Rosa26)Sor的ZFN对,并用于单细胞小鼠胚胎的基因阻断和同源基因替换。当在小鼠受精卵中表达时,一对特定的ZFN促进了非同源末端连接(NHEJ)介导的基因破坏。当ZFN对与靶向载体共注射时,我们还观察到了单一的同源重组(HR)驱动的基因替换事件。我们的实验证明了在小鼠受精卵中直接使用开放ZFN技术既可以通过NHEJ实现基因消融,也可以通过HR实现基因替换。
Zinc finger nucleases (ZFNs) enable precise genome modification in a variety of organisms and cell types. Commercial ZFNs were reported to enhance gene targeting directly in mouse zygotes, whereas similar approaches using publicly available resources have not yet been described. Here we report precise targeted mutagenesis of the mouse genome using Oligomerized Pool Engineering (OPEN) ZFNs. OPEN ZFN can be constructed using publicly available resources and therefore provide an attractive alternative for academic researchers. Two ZFN pairs specific to the mouse genomic locus gt(ROSA26)Sor were generated by OPEN selections and used for gene disruption and homology-mediated gene replacement in single cell mouse embryos. One specific ZFN pair facilitated non-homologous end joining (NHEJ)-mediated gene disruption when expressed in mouse zygotes. We also observed a single homologous recombination (HR)-driven gene replacement event when this ZFN pair was co-injected with a targeting vector. Our experiments demonstrate the feasibility of achieving both gene ablation through NHEJ and gene replacement by HR by using the OPEN ZFN technology directly in mouse zygotes.
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