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Mouse Genome Engineering Using Designer Nucleases
Published on: April 2, 2014
Efficient gene targeting by TAL effector nucleases coinjected with exonucleases in zygotes
Tomoji Mashimo1, Takehito Kaneko, Tetsushi Sakuma
1Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan. tmashimo@anim.med.kyoto-u.ac.jp
Scientific Reports
|February 15, 2013
Summary
Combining TAL Effector Nucleases (TALENs) with Exonuclease 1 (Exo1) significantly enhances gene editing efficiency in rat cells and embryos. This improved method facilitates the creation of gene knockout rats, advancing gene targeting technologies.
Area of Science:
- Molecular Biology
- Genetics
- Biotechnology
Background:
- TAL Effector Nucleases (TALENs) are powerful gene editing tools.
- Current TALEN efficiency is limited, particularly in mammalian embryos.
- Enhanced gene disruption methods are needed for broader applications.
Purpose of the Study:
- To improve the efficiency of TALEN-mediated gene editing.
- To investigate the synergistic effect of Exonuclease 1 (Exo1) with TALENs.
- To establish an efficient method for generating gene knockout rats.
Main Methods:
- Engineered site-specific TALENs were combined with Exonuclease 1 (Exo1).
- Gene disruption was tested in rat fibroblast cells and fertilized rat eggs.
- Knockout rat production was assessed for the albino (Tyr) gene.
Main Results:
- Combined expression of TALENs and Exo1 led to highly efficient gene disruption in rat cells.
- Exo1 increased gene editing efficiency by up to ~30% in fertilized rat eggs.
- Successful production of knockout rats for the albino (Tyr) gene was achieved.
Conclusions:
- TALENs combined with Exo1 offer an efficient and straightforward method for gene knockout generation.
- This approach enhances gene targeting capabilities in zygotes across various species.
- The findings expand the toolkit for genetic engineering and research.
