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Related Experiment Video

Updated: May 20, 2026

Generation of Patient-Derived Podocytes from Skin Biopsies

Generation of Patient-Derived Podocytes from Skin Biopsies

Published on: May 26, 2023

Growth-dependent podocyte failure causes glomerulosclerosis.

Akihiro Fukuda¹, Mahboob A Chowdhury, Madhusudan P Venkatareddy

¹Nephrology Division, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.

Journal of the American Society of Nephrology : JASN

|July 10, 2012

Summary

This summary is machine-generated.

Impaired podocyte growth response to stress causes glomerulosclerosis and kidney failure. Calorie restriction preventing weight gain and glomerular enlargement may slow or prevent end-stage renal disease (ESRD).

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Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation

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An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney

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Area of Science:

Nephrology
Cell Biology
Molecular Biology

Background:

Podocyte depletion causes glomerulosclerosis.
The role of podocyte hypertrophic stress response in glomerulosclerosis is unknown.

Purpose of the Study:

To investigate if impaired podocyte hypertrophic response to stress causes glomerulosclerosis.

Main Methods:

Generated transgenic rats with dominant negative AA-4E-BP1 transgene driven by podocin promoter.
Studied kidney histology, protein excretion, and effects of body weight, transgene dose, uni-nephrectomy, and calorie restriction.

Main Results:

Transgenic rats developed end-stage renal disease (ESRD) by 12 months.
Proteinuria and glomerulosclerosis correlated with body weight and transgene dose.
Calorie restriction preventing weight gain and glomerular enlargement prevented disease development.

Conclusions:

Failure of podocytes to match glomerular tuft growth via mTORC1 pathway triggers proteinuria, glomerulosclerosis, and ESRD.
Reducing body weight and glomerular growth may be adjunctive therapies for slowing ESRD progression.