Engineering a self-eliminating transgene in the yellow fever mosquito, Aedes aegypti.

Engineering a self-eliminating transgene in the yellow fever mosquito, Aedes aegypti.
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DOI:
10.1093/pnasnexus/pgac037
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发表时间:
2022-05
期刊:
PNAS NEXUS
影响因子:
--
通讯作者:
Adelman, Zach N.
Adelman, Zach N.
中科院分区:
其他
文献类型:
--
作者:
Chae, Keun;Dawson, Chanell;Valentin, Collin;Contreras, Bryan;Zapletal, Josef;Myles, Kevin M.;Adelman, Zach N.

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Promising genetics-based approaches are being developed to reduce or prevent the transmission of mosquito-vectored diseases. Less clear is how such transgenes can be removed from the environment, a concern that is particularly relevant for highly invasive gene drive transgenes. Here, we lay the groundwork for a transgene removal system based on single-strand annealing (SSA), a eukaryotic DNA repair mechanism. An SSA-based rescuer strain (kmoRG) was engineered to have direct repeat sequences (DRs) in the Aedes aegypti kynurenine 3-monooxygenase (kmo) gene flanking the intervening transgenic cargo genes, DsRED and EGFP. Targeted induction of DNA double-strand breaks (DSBs) in the DsRED transgene successfully triggered complete elimination of the entire cargo from the kmoRG strain, restoring the wild-type kmo gene, and thereby, normal eye pigmentation. Our work establishes the framework for strategies to remove transgene sequences during the evaluation and testing of modified strains for genetics-based mosquito control.
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