简介：
Overview
This protocol outlines the zygote microinjection technique for CRISPR-Cas9 and donor DNA, facilitating the creation of gene cassette knock-in and floxed mice. This method is essential for advanced in vivo experiments in various research fields.
Key Study Components
Area of Science
- Genetic Engineering
- Neuroscience
- Transgenic Models
Background
- Genetically-modified mice are crucial for studying gene function and disease mechanisms.
- The CRISPR-Cas9 system allows precise genome editing.
- This technique supports diverse research areas including neurology and immunology.
- Efficient gene targeting can enhance experimental outcomes in mouse models.
Purpose of Study
- To develop a reliable method for creating genetically-modified mice.
- To enable advanced genetic modifications for various research applications.
- To improve the efficiency of gene targeting in mouse zygotes.
Methods Used
- Preparation of zygotes and microinjection setup.
- Injection of CRISPR components into zygotes.
- Monitoring of zygote development post-injection.
- Assessment of gene targeting efficiency and birth rates.
Main Results
- Median production efficiency for gene cassette knock-in mice was 20.8%.
- Median birth rate under nonlethal conditions was 34.0%.
- Median production efficiency for floxed mice was 7.7%.
- Demonstrated potential for high efficiency in gene editing applications.
Conclusions
- The microinjection technique is effective for generating genetically-modified mice.
- Adjustments in microinjection parameters are crucial for success.
- This method supports a wide range of genetic studies in various fields.
What is the main application of this technique?
This technique is primarily used for creating genetically-modified mice for research in genetics and disease.
How does CRISPR-Cas9 improve gene editing?
CRISPR-Cas9 allows for precise and efficient modifications at specific genomic locations.
What are floxed mice?
Floxed mice have specific genes flanked by loxP sites, allowing for conditional gene knockout.
What factors influence the success of zygote microinjection?
Factors include the quality of zygotes, microinjection technique, and the composition of the injection solution.
What is the significance of gene cassette knock-in?
Gene cassette knock-in allows for the insertion of new genetic material, facilitating the study of gene function.
Who demonstrated the procedure?
The procedure was demonstrated by technical staff Natsumi Iki, Miyuki Ishida, and Yoko Tanimoto.
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