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Generation of Brown Fat-Specific Knockout Mice Using a Combined Cre-LoxP, CRISPR-Cas9, and Adeno-Associated Virus Single-Guide RNA System
Published on: March 24, 2023
Generation and Validation of Tissue-Specific Knockout Strains for Toxicology Research
Cherish A Taylor1, William Shawlot2, Jin Xiang Ren2
1Division of Pharmacology & Toxicology, College of Pharmacy, Institute for Cellular & Molecular Biology and Institute for Neuroscience, University of Texas at Austin, Austin, Texas.
This study details the Cre-loxP system for generating tissue-specific knockout mice. It covers creating conditional alleles, breeding strategies, and validation methods for reliable genetic research models.
Area of Science:
- Genetics and Genomics
- Developmental Biology
- Molecular Biology
Background:
- Tissue-specific knockout mice are essential tools in scientific research.
- The Cre-loxP system is a primary method for creating these specialized mouse models.
- Efficient generation and validation protocols are crucial for reproducible research.
Purpose of the Study:
- To provide a comprehensive guide for generating tissue-specific knockout mice using the Cre-loxP system.
- To detail the necessary steps from creating conditional alleles to validating the final knockout mice.
- To offer a standardized protocol for researchers utilizing this technique.
Main Methods:
- Gene targeting in mouse embryonic stem cells to generate conditional alleles.
- Recovery of Cre transgenic mice from cryopreserved sperm via in vitro fertilization.
- Breeding strategies for obtaining specific tissue knockouts.
- Validation using PCR, RT-PCR, qPCR, and immunoblot analysis.
Main Results:
- Successful generation of conditional alleles in mouse embryonic stem cells.
- Establishment of protocols for recovering transgenic mice and implementing breeding schemes.
- Comprehensive validation of knockout mice at DNA, mRNA, and protein levels.
Conclusions:
- The described protocols offer a robust framework for generating and validating tissue-specific knockout mice.
- This methodology facilitates the study of gene function in specific tissues.
- The detailed steps ensure reproducibility and reliability in creating genetically modified mouse models.
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