Germline excision of transgenes in Aedes aegypti by homing endonucleases.

Germline excision of transgenes in Aedes aegypti by homing endonucleases.
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DOI:
10.1038/srep01603
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Adelman, Zach N.
Adelman, Zach N.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Aryan, Azadeh;Anderson, Michelle A. E.;Myles, Kevin M.;Adelman, Zach N.

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伊蚊Aedes(Ae.)埃及伊蚊是登革热病毒(血清型1 -4)和基孔肯雅病毒的主要载体。归巢核酸内切酶(Homing endonuclease,HE)是一种古老的自私因子,以高度特异性的方式催化双链DNA断裂(double stranded DNA breaks,DSB)。在这份报告中,我们表明,HEs Y2-I-AniI,I-CreI和I-SceI都能够催化切除基因组片段从Ae。埃及人基因组中的一种遗传方式。Y2-I-AniI在两个独立的基因组靶点上表现出最高的效率,20-40%的Y2-I-AniI处理的个体产生了失去靶转基因的后代。发现HE诱导的DSB通过单链退火(SSA)和非同源末端连接(NHEJ)途径以依赖于转基因中直接重复序列的可用性的方式被修复。这些结果支持在Ae中开发基于HE的基因编辑和基因驱动策略。埃及伊蚊,并确认HEs在该重要载体中的转基因操作和修饰中的效用。
Aedes (Ae.) aegypti is the primary vector for dengue viruses (serotypes1–4) and chikungunya virus. Homing endonucleases (HEs) are ancient selfish elements that catalyze double-stranded DNA breaks (DSB) in a highly specific manner. In this report, we show that the HEs Y2-I-AniI, I-CreI and I-SceI are all capable of catalyzing the excision of genomic segments from the Ae. aegypti genome in a heritable manner. Y2-I-AniI demonstrated the highest efficiency at two independent genomic targets, with 20–40% of Y2-I-AniI-treated individuals producing offspring that had lost the target transgene. HE-induced DSBs were found to be repaired via the single-strand annealing (SSA) and non-homologous end-joining (NHEJ) pathways in a manner dependent on the availability of direct repeat sequences in the transgene. These results support the development of HE-based gene editing and gene drive strategies in Ae. aegypti, and confirm the utility of HEs in the manipulation and modification of transgenes in this important vector.
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