Chapter title |
Direct Generation of Conditional Alleles Using CRISPR/Cas9 in Mouse Zygotes
|
---|---|
Chapter number | 2 |
Book title |
Site-Specific Recombinases
|
Published in |
Methods in molecular biology, January 2017
|
DOI | 10.1007/978-1-4939-7169-5_2 |
Pubmed ID | |
Book ISBNs |
978-1-4939-7167-1, 978-1-4939-7169-5
|
Authors |
Colin E. J. Pritchard, Lona J. Kroese, Ivo J. Huijbers |
Abstract |
Conditional alleles in genetically modified mice allow for the deletion of a gene of interest in a target tissue when combined with a tissue-specific Cre recombinase. A conditional allele is achieved by introducing LoxP sites around a critical exon, a gene, or a cluster of genes. Previously, conditional alleles were introduced in the mouse germline by classic gene targeting in embryonic stem cells, a challenging and time-consuming procedure. Now, conditional alleles can be generated directly in fertilized mouse eggs (zygotes) using the CRISPR/Cas9 technology. This one-step generation of mice is easier in design and faster. Here, we describe our achieved success rate, the considerations in design of a conditional allele, a detailed protocol to prepare the zygote injection mix, and the screening procedure to identify the new conditional knockout mouse strain. |
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