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Tackling Tissue Macrophage Heterogeneity by SplitCre Transgenesis.
Sigalit Boura-Halfon1, Rebecca Haffner-Krausz2, Shifra Ben-Dor3
1Department of Immunology and Regenerative Biology, Weizmann Institute of Science, Rehovot, Israel. s.boura-halfon@weizmann.ac.il.
Methods in Molecular Biology (Clifton, N.J.)
|August 28, 2023
Summary
New CRISPR/Cas9 methods enable precise study of macrophage subpopulations. This advanced genetic technique improves understanding of these immune cells in health and disease.
Area of Science:
- Immunology
- Genetics
- Cell Biology
Background:
- Macrophages are diverse immune cells crucial for tissue homeostasis.
- Studying specific macrophage populations is challenging due to limited specificity of traditional genetic models.
- Classical Cre recombinase-mediated conditional mutagenesis often lacks precision for distinct macrophage subsets.
Purpose of the Study:
- To introduce and elaborate on CRISPR/Cas9-based binary transgenic strategies for studying tissue-resident macrophage subpopulations.
- To highlight the advantages of intersectional genetics for precise genetic manipulation.
- To discuss the application of these advanced techniques in mouse models.
Main Methods:
- Utilizing CRISPR/Cas9 technology for enhanced genetic targeting.
- Employing a binary transgenic system with two promoters driving inactive Cre fragments.
- Co-expression of Cre fragments leads to dimerization and subsequent Cre recombinase activity.
Main Results:
- This approach allows for the characterization and manipulation of genetically defined tissue macrophage subpopulations.
- Overcomes limitations of single promoter-driven Cre models.
- Enables more accurate functional studies of specific macrophage subsets.
Conclusions:
- CRISPR/Cas9-mediated intersectional genetics offers a powerful, cost-effective tool for macrophage research.
- This methodology improves the study of tissue macrophage heterogeneity in both physiological and pathophysiological contexts.
- Advanced genetic strategies are essential for dissecting complex immune cell functions.
