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Updated: Aug 8, 2025
Isolation, Characterization, And High Throughput Extracellular Flux Analysis of Mouse Primary Renal Tubular Epithelial Cells
Published on: June 20, 2018
A refined protocol for the isolation and monoculture of primary mouse renal peritubular endothelial cells
Austin D Thompson1,2,3, Jaroslav Janda1, Rick G Schnellmann1,2,3
1Department of Pharmacology and Toxicology, College of Pharmacy, Bio5 Institute, The University of Arizona, Tucson, AZ, United States.
Abstract:
During an episode of acute kidney injury (AKI), a sudden and rapid decline in renal function is often accompanied by a persistent reduction in mitochondrial function, microvasculature dysfunction/rarefaction, and tubular epithelial injury/necrosis. Additionally, patients who have experienced an AKI are at an elevated risk of developing other progressive renal, cardiovascular, and cardiorenal related diseases. While restoration of the microvasculature is imperative for oxygen and nutrient delivery/transport during proper renal repair processes, the mechanism(s) by which neovascularization and/or inhibition of microvascular dysfunction improves renal recovery remain understudied. Interestingly, pharmacological stimulation of mitochondrial biogenesis (MB) post-AKI has been shown to restore mitochondrial and renal function in mice. Thus, targeting MB pathways in microvasculature endothelial cell (MV-EC) may provide a novel strategy to improve renal vascular function and repair processes post-AKI. However, limitations to studying such mechanisms include a lack of commercially available primary renal peritubular MV-ECs, the variability in both purity and outgrowth of primary renal MV-EC in monoculture, the tendency of primary renal MV-ECs to undergo phenotypic loss in primary monoculture, and a limited quantity of published protocols to obtain primary renal peritubular MV-ECs. Thus, we focused on refining the isolation and phenotypic retention of mouse renal peritubular endothelial cells (MRPEC) for future physiological and pharmacological based studies. Here, we present a refined isolation method that augments the purity, outgrowth, and phenotypic retention of primary MRPEC monocultures by utilizing a collagenase type I enzymatic digestion, CD326+ (EPCAM) magnetic microbead epithelial cell depletion, and two CD146+ (MCAM) magnetic microbead purification cycles to achieve a monoculture MRPEC purity of ≅ 91-99% by all markers evaluated.
Insights
Researchers refined a method to isolate mouse renal peritubular endothelial cells (MRPEC), improving purity and cell retention for studying acute kidney injury (AKI) recovery and potential mitochondrial biogenesis (MB) therapies.
Area of Science:
- Nephrology
- Vascular Biology
- Cell Biology
Background:
- Acute kidney injury (AKI) causes renal dysfunction, microvascular damage, and increases long-term disease risk.
- Restoring microvasculature is crucial for kidney repair, but mechanisms remain unclear.
- Targeting mitochondrial biogenesis (MB) in microvascular endothelial cells (MV-ECs) may enhance recovery post-AKI.
Purpose of the Study:
- To develop a reliable method for isolating and maintaining mouse renal peritubular MV-ECs (MRPEC) for research.
- To overcome limitations in current MRPEC isolation and culture techniques.
- To facilitate future studies on renal vascular function and repair post-AKI.
Main Methods:
- Refined isolation protocol using collagenase type I digestion.
- Depletion of epithelial cells using CD326+ (EPCAM) magnetic microbeads.
- Purification of endothelial cells via two CD146+ (MCAM) magnetic microbead cycles.
Main Results:
- Achieved high purity (91-99%) of MRPEC monocultures.
- Enhanced cell outgrowth and phenotypic retention.
- Established a reproducible method for obtaining pure MRPEC.
Conclusions:
- The refined method significantly improves MRPEC isolation and culture.
- This protocol supports future research into AKI recovery and therapeutic targets.
- Enables investigation of MB pathways in renal MV-ECs.
