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Updated: Mar 16, 2026
Phenotypic Characterization of Macrophages from Rat Kidney by Flow Cytometry
Published on: October 18, 2016
Macrophage Phenotype in Kidney Injury and Repair
Xiao-Ming Meng1, Patrick Ming-Kuen Tang2, Jun Li1
1School of Pharmacy, Anhui Medical University, Hefei, China.
Background:
Glomerular and interstitial macrophage infiltration is a feature for both the acute and chronic kidney diseases. Macrophages have been shown to play a diverse role in kidney injury and repair. Thus, macrophages may be a key cell type in acute and chronic kidney injury and repair.
Summary And Key Messages:
During renal inflammation, circulating monocytes are recruited and then become activated and polarized. By adapting to the local microenvironment, macrophages can differentiate into different phenotypes and function as a double-bladed sword in different stages of kidney disease. In general, M1 macrophages play a pathogenic role in boosting inflammatory renal injury, whereas M2 macrophages exert an anti-inflammatory and wound healing (or profibrotic) role during renal repair. In this review, we highlight the phenotypic polarization of macrophages in renal diseases and dissect their distinct functions in renal injury and repair processes, respectively. Moreover, the current understanding of regulatory mechanisms on the phenotypic switch and macrophage-related therapy are also intensively discussed.
Insights
Macrophages are key players in kidney disease, acting as a double-edged sword. Understanding their M1 (inflammatory) and M2 (repair) roles is crucial for developing new kidney injury therapies.
Area of Science:
- Nephrology
- Immunology
- Cell Biology
Background:
- Macrophage infiltration is a hallmark of acute and chronic kidney diseases.
- Macrophages exhibit diverse roles in kidney injury and repair processes.
- These immune cells are critical in the pathogenesis and resolution of renal conditions.
Purpose of the Study:
- To review the phenotypic polarization of macrophages in renal diseases.
- To dissect the distinct functions of macrophage phenotypes in kidney injury and repair.
- To discuss regulatory mechanisms of macrophage phenotypic switching and therapeutic strategies.
Main Methods:
- Literature review of studies on macrophage polarization in kidney disease.
- Analysis of the roles of M1 and M2 macrophages in renal inflammation and repair.
- Discussion of current therapeutic approaches targeting macrophages.
Main Results:
- Monocytes are recruited and polarized into macrophages during renal inflammation.
- M1 macrophages promote inflammatory injury, while M2 macrophages aid in repair.
- Macrophage phenotypes adapt to the local microenvironment, exhibiting dual roles.
Conclusions:
- Macrophages are central to kidney injury and repair, with distinct M1 and M2 functions.
- Understanding macrophage polarization is essential for developing targeted therapies for kidney diseases.
- Further research into macrophage regulatory mechanisms can lead to novel therapeutic interventions.
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