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Updated: Jun 22, 2025
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Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation
Published on: August 19, 2020
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Developmental Causes of Focal Segmental Glomerulosclerosis
Luna Shane Klomp1, Elena Levtchenko1, Rik Westland1
1Department of Pediatric Nephrology, Emma Children's Hospital - Amsterdam UMC, Location University of Amsterdam, Amsterdam, The Netherlands.
Glomerular Diseases
|July 2, 2024
Summary
Focal segmental glomerulosclerosis (FSGS) in congenital anomalies of the kidney and urinary tract (CAKUT) may stem from more than just reduced nephrons. This review explores multifactorial causes involving podocyte and nephron progenitor cell mechanisms.
Area of Science:
- Nephrology
- Developmental Biology
- Genetics
Background:
- Focal segmental glomerulosclerosis (FSGS) is a kidney disease characterized by glomerular damage.
- Congenital anomalies of the kidney and urinary tract (CAKUT) are linked to FSGS.
- Previously, FSGS in CAKUT was attributed solely to reduced nephron number and hyperfiltration.
Purpose of the Study:
- To challenge the singular hypothesis of hyperfiltration-induced FSGS in CAKUT.
- To propose a multifactorial pathogenesis for FSGS in CAKUT.
- To highlight overlapping cellular mechanisms in podocyte injury and developmental defects.
Main Methods:
- Review of existing literature on FSGS pathogenesis.
- Analysis of genetic factors, including PAX2 variants.
- Exploration of podocyte biology and nephron progenitor cell function.
Main Results:
- New evidence suggests developmental defects contribute to FSGS, even without congenital kidney anomalies.
- PAX2 gene variants, critical for kidney development, are implicated in adult-onset FSGS.
- A multifactorial model encompassing podocyte injury and developmental pathways is proposed.
Conclusions:
- FSGS in CAKUT likely involves complex interactions beyond simple hyperfiltration.
- Shared cellular mechanisms may link developmental processes and podocyte injury in FSGS.
- Further research into these overlapping pathways is crucial for understanding and treating FSGS.
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