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Updated: Jan 19, 2026
Isolation of Primary Human Proximal Tubule Epithelial Cells and Their Use in Creating a Microphysiological Model of the Renal Proximal Tubule
Published on: May 9, 2025
Rrm2b deletion causes mitochondrial metabolic defects in renal tubules
Yi-Fan Chen1, I-Hsuan Lin2, Yu-Ru Guo3
1The Ph.D. Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, 11031, Taipei, Taiwan.
Abstract:
Renal diseases impose considerable health and economic burdens on health systems worldwide, and there is a lack of efficient methods for the prevention and treatment due to their complexity and heterogeneity. Kidneys are organs with a high demand for energy produced by mitochondria, in which Rrm2b has critical functions as reported. The Rrm2b kidney-specific knockout mice we generated exhibited age-dependent exacerbated features, including mitochondrial dysfunction and increased oxidative stress; additionally, resulted in severe disruption of mitochondria-related metabolism. Rrm2b is vital not only to supply dNTPs for DNA replication and repair, but also to maintain structural integrity and metabolic homeostasis in mitochondria. Thence, Rrm2b deletion might induce chronic kidney defects in mice. This model can facilitate exploration of novel mechanisms and targeted therapies in the kidney diseases and has important translational and clinical implications.
Insights
Mitochondrial protein Rrm2b is crucial for kidney health. Its absence in mice caused kidney defects, highlighting Rrm2b
Area of Science:
- Biochemistry
- Mitochondrial Biology
- Nephrology
Background:
- Renal diseases present significant global health and economic challenges.
- Kidneys have high energy demands met by mitochondria, where Rrm2b plays a key role.
- Current treatments for kidney diseases are limited due to their complexity.
Purpose of the Study:
- To investigate the role of Rrm2b in kidney function and disease.
- To establish a mouse model for studying kidney defects related to Rrm2b.
Main Methods:
- Generation of kidney-specific Rrm2b knockout mice.
- Analysis of age-dependent kidney phenotypes, including mitochondrial function and metabolism.
- Assessment of DNA replication and repair mechanisms.
Main Results:
- Rrm2b knockout mice showed exacerbated age-dependent kidney defects.
- Mitochondrial dysfunction and increased oxidative stress were observed.
- Disruption of mitochondria-related metabolism and impaired DNA synthesis occurred.
Conclusions:
- Rrm2b is essential for maintaining kidney structural integrity and metabolic homeostasis.
- Rrm2b deficiency leads to chronic kidney defects in mice.
- This Rrm2b-deficient model offers insights into kidney disease mechanisms and potential therapies.
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