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Updated: Jul 6, 2026
Guided Differentiation of Mature Kidney Podocytes from Human Induced Pluripotent Stem Cells Under Chemically Defined Conditions
Published on: July 2, 2020
New insights into the function of the Wilms tumor suppressor gene WT1 in podocytes
Avril A Morrison1, Rebecca L Viney, Moin A Saleem
1Bristol Genomics Research Institute, Centre for Research in Biomedicine, Faculty of Health and Life Sciences, University of the West of England, Bristol, UK.
Abstract:
The Wilms tumor suppressor gene WT1 is essential for early urogenital development: homozygous mutations in WT1 result in embryonic lethality due to a failure in the development of kidneys and gonads. In the adult kidney, WT1 expression is limited to the glomerular podocytes. Several human nephrotic diseases arise from mutations of the WT1 gene, including mutations that affect its zinc-fingers and alternative splicing of +/- KTS isoforms. These include WAGR (for Wilms tumor, aniridia, genitourinary anomalies, and mental retardation), and Frasier and Denys-Drash syndromes. Recent advances including the development of transgenic mouse models and conditionally immortalized podocyte cell lines are beginning to shed light on WT1's crucial role in podocyte function.
Insights
The Wilms tumor suppressor gene (WT1) is vital for kidney and gonad development. Mutations in WT1 cause severe developmental failures and nephrotic diseases in humans.
Area of Science:
- Genetics
- Developmental Biology
- Nephrology
Background:
- The Wilms tumor suppressor gene (WT1) is crucial for early urogenital development.
- WT1 mutations lead to embryonic lethality, impacting kidney and gonad formation.
- In adult kidneys, WT1 is specifically expressed in glomerular podocytes.
Purpose of the Study:
- To elucidate the critical role of WT1 in podocyte function.
- To understand the genetic basis of nephrotic diseases linked to WT1 mutations.
- To explore the impact of WT1 mutations on kidney development and disease.
Main Methods:
- Analysis of WT1 gene mutations in human nephrotic syndromes.
- Utilizing transgenic mouse models to study WT1 function.
- Employing conditionally immortalized podocyte cell lines for in vitro studies.
Main Results:
- WT1 mutations affecting zinc-fingers and +/- KTS splicing are implicated in WAGR, Frasier, and Denys-Drash syndromes.
- Studies highlight WT1's essential role in maintaining podocyte integrity and function.
- WT1 is indispensable for the proper development of kidneys and gonads.
Conclusions:
- WT1 is a key regulator of urogenital development and podocyte function.
- Genetic defects in WT1 underlie several severe nephrotic diseases.
- Ongoing research with advanced models is crucial for understanding WT1's complex roles.
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