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Updated: Aug 19, 2025
Phenotypic Characterization of Macrophages from Rat Kidney by Flow Cytometry
Published on: October 18, 2016
Where Are They Now: Spatial and Molecular Diversity of Tissue-Resident Macrophages in the Kidney
Matthew D Cheung1, Anupam Agarwal2, James F George3
1Department of Surgery, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama; Department of Medicine, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama; Nephrology Research and Training Center, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama.
Abstract:
Kidney resident macrophages (KRMs) are involved in homeostasis, phagocytosis, defense against infectious agents, response to insults, inflammation, and tissue repair. They also play critical roles in the pathogenesis and recovery from many kidney diseases such as acute kidney injury. KRMs historically have been studied as one homogenous population, but the wide-ranging roles and phenotypes observed suggest that there is greater heterogeneity than previously understood. Advancements in RNA sequencing technologies (single-cell RNA sequencing and spatial transcriptomics) have identified specific subsets of KRMs that are molecularly, functionally, and spatially distinct with dynamic changes after kidney injury. Multiple studies have identified unique markers that represent these subpopulations, permitting further characterization of the function and roles they play in the kidney. Understanding the diversity of KRM subpopulations will be key in the development of novel therapies used in treating kidney diseases and promoting kidney health.
Insights
Kidney resident macrophages (KRMs) are diverse. New research reveals distinct subpopulations crucial for kidney health and disease recovery, paving the way for targeted therapies.
Area of Science:
- Immunology
- Renal Biology
- Cellular Heterogeneity
Background:
- Kidney resident macrophages (KRMs) are vital for kidney homeostasis and disease pathogenesis.
- Historically viewed as a uniform population, KRMs exhibit diverse roles and phenotypes.
- KRMs are critical in acute kidney injury and other renal diseases.
Purpose of the Study:
- To explore the heterogeneity of kidney resident macrophages.
- To identify distinct KRM subpopulations and their roles in kidney health and disease.
- To highlight the potential of understanding KRM diversity for novel therapeutic strategies.
Main Methods:
- Single-cell RNA sequencing
- Spatial transcriptomics
- Marker identification for KRM subpopulations
Main Results:
- Identification of distinct molecularly, functionally, and spatially defined KRM subsets.
- Demonstration of dynamic changes in KRM subpopulations following kidney injury.
- Discovery of unique markers characterizing specific KRM populations.
Conclusions:
- Kidney resident macrophages are highly heterogeneous, comprising distinct subpopulations.
- Understanding KRM diversity is essential for developing targeted therapies for kidney diseases.
- Further characterization of KRM subsets will advance kidney disease treatment and promote renal health.
