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Updated: Aug 10, 2025

CRISPR-Cas9 Genome Editing of Rat Embryos using Adeno-Associated Virus AAV and 2-Cell Embryo Electroporation
Published on: March 15, 2024
Genome Editing of Rat.
1Division of Fundamental and Applied Sciences, Graduate School of Science and Engineering, Iwate University, Morioka, Iwate, Japan. takehito@iwate-u.ac.jp.
Genome editing technologies like CRISPR-Cas9 simplify the creation of genetically engineered rat strains. New methods, including the technique for animal knockout system by electroporation (TAKE), improve efficiency for producing knockout and knock-in rats.
Area of Science:
- Genetics and Genomics
- Animal Models
- Biotechnology
Background:
- Genome editing technologies have revolutionized the creation of genetically modified animal models.
- Traditional methods for generating engineered rat strains faced challenges with technical difficulty and low efficiency.
- Zinc finger nuclease (ZFN), transcription activator-like effector nuclease (TALEN), and CRISPR-Cas9 are key genome editing tools.
Purpose of the Study:
- To present the latest protocols for producing genome-edited rats.
- To highlight advancements in efficiency and simplicity for creating knockout and knock-in rat strains.
- To introduce the technique for animal knockout system by electroporation (TAKE) as a novel method.
Main Methods:
- Utilizing genome editing nucleases: ZFN, TALEN, and CRISPR-Cas9.
- Employing microinjection techniques for genetic material delivery.
- Implementing the technique for animal knockout system by electroporation (TAKE) for enhanced efficiency.
Main Results:
- Successful generation of knockout and knock-in rat strains using established and novel genome editing methods.
- Demonstration of increased production efficiency compared to older techniques.
- Validation of the technique for animal knockout system by electroporation (TAKE) as a viable alternative.
Conclusions:
- Genome editing technologies have significantly advanced the production of genetically engineered rat models.
- The development of methods like TAKE has overcome previous limitations in efficiency and technical difficulty.
- These protocols provide researchers with powerful tools for creating specific rat strains for various research applications.
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