Related Experiment Video

Updated: Apr 4, 2026

Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells
06:23

Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells

Published on: November 21, 2025

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Rapid Podocyte ablation Causes Acute Renal Tubule Cell Necrosis and Interstitial Fibrosis

Yilin Chen, Mohammad Islamuddin, Xiaofeng Ding

    Biorxiv : the Preprint Server for Biology
    |April 3, 2026
    PubMed

    Insights

    Acute podocyte loss causes kidney tubular cell damage and renal failure. This study developed a mouse model to show podocyte injury directly leads to renal tubular necrosis and fibrosis, offering insights into kidney disease mechanisms.

    Area of Science:

    • Nephrology
    • Renal Pathophysiology
    • Experimental Nephrology

    Background:

    • The direct impact of podocyte loss on acute renal tubular cell (RTC) damage, interstitial fibrosis, and subsequent renal failure remains poorly understood.
    • Existing models may not fully capture the rapid and specific nature of podocyte injury.

    Purpose of the Study:

    • To establish a novel mouse model for acute, specific podocyte ablation.
    • To investigate the direct consequences of podocyte loss on renal tubular cells and kidney function.
    • To explore the molecular mechanisms and potential therapeutic targets in podocyte injury-induced kidney disease.

    Main Methods:

    • Generation of an acute, specific podocyte-ablation mouse model using intermedilysin (ILY)-mediated human CD59 (hCD59) cell ablation in Nphs2Cre mice.
    • Administration of ILY to induce podocyte ablation and observation of dose-dependent effects on renal failure and survival.
    • Analysis of renal pathology, glomerular function, proteinuria, and tubule damage in ablated mice, with and without supportive treatment (peritoneal dialysis).
    • Transcriptomic analysis of kidney samples from ablated mice and glomerulonephritis patients to identify altered gene and pathway expressions.

    Main Results:

    • Rapid podocyte ablation directly induced RTC necrosis, leading to dose-dependent renal failure and death within 2-3 days.
    • Supportive treatment extended survival, revealing progressive interstitial fibrosis, glomerulosclerosis, persistent proteinuria, and tubule damage.
    • Glomerular function was severely disrupted at week 1 post-ablation, with partial recovery by week 2.
    • Upregulation of TLRs and apoptosis pathways, and downregulation of mitochondrial functions were observed in both the mouse model and human kidney samples.

    Conclusions:

    • Acute podocyte ablation in this model directly causes RTC necrosis, progressing to interstitial fibrosis and renal failure.
    • This model is valuable for studying podocyte injury-mediated tubular damage and glomerular repair mechanisms.
    • The findings suggest potential novel therapeutic targets for kidney diseases stemming from podocyte injury.

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