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Updated: Mar 14, 2026
Isolation and Culture of Bone Marrow-Derived Macrophages from Mice
Published on: June 23, 2023
Rabbit M1 and M2 macrophages can be induced by human recombinant GM-CSF and M-CSF
Kazuyoshi Yamane1, Kai-Poon Leung2
1US Army Dental and Craniofacial Trauma Research and Tissue Regeneration Institute of Surgical Research Fort Sam Houston TX USA; Department of Bacteriology Osaka Dental University Hirakata-shi Osaka Japan.
Abstract:
Macrophages can change their phenotype in response to environmental cues. Polarized macrophages are broadly classified into two groups: classical activated M1 and alternative activated M2. Characterization of human macrophages has been widely studied, but polarized macrophages in rabbits have not been characterized. We characterized rabbit macrophages that were polarized using human recombinant GM-CSF and M-CSF. GM-CSF-treated macrophages had higher mRNA expression of proinflammatory cytokines (M1 phenotype) than did the M-CSF-treated counterpart. By contrast, high levels of TGF-β and IL-10 expression (M2 phenotype) were found in M-CSF-treated macrophages. The present study may be useful to understand roles of polarized macrophages in rabbit disease models.
Insights
This study characterized polarized rabbit macrophages, finding GM-CSF induced M1 phenotypes and M-CSF induced M2 phenotypes. These findings advance understanding of rabbit immune responses in disease models.
Area of Science:
- Immunology
- Cell Biology
- Veterinary Medicine
Background:
- Macrophages exhibit diverse phenotypes (M1, M2) crucial for immune responses.
- Human macrophage polarization is well-documented, but rabbit macrophage polarization remains understudied.
- Understanding rabbit macrophage polarization is vital for utilizing rabbit disease models.
Purpose of the Study:
- To characterize polarized M1 and M2 macrophages in rabbits.
- To investigate the effects of granulocyte-macrophage colony-stimulating factor (GM-CSF) and macrophage colony-stimulating factor (M-CSF) on rabbit macrophage polarization.
Main Methods:
- Rabbit macrophages were isolated and cultured.
- Polarization was induced using human recombinant GM-CSF and M-CSF.
- mRNA expression of key cytokines (pro-inflammatory, M1, M2 markers) was analyzed.
Main Results:
- GM-CSF treatment resulted in higher mRNA expression of pro-inflammatory cytokines, indicative of an M1 phenotype.
- M-CSF treatment led to high expression of TGF-β and IL-10, characteristic of an M2 phenotype.
- Differential gene expression confirmed distinct M1 and M2 polarization patterns in rabbit macrophages.
Conclusions:
- Rabbit macrophages can be polarized into M1 and M2 phenotypes using GM-CSF and M-CSF, respectively.
- This characterization provides a foundation for studying macrophage roles in rabbit disease models.
- The findings contribute to comparative immunology and the development of translational research using rabbits.
