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Updated: Jul 30, 2026
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Isolation and Culture of Cells from the Nephrogenic Zone of the Embryonic Mouse Kidney
Published on: April 22, 2011
Secreted Frizzled-related proteins can regulate metanephric development
K Yoshino1, J S Rubin, K G Higinbotham
1Laboratory of Comparative Carcinogenesis, Building 538/Room 205E, National Cancer Institute, Frederick, MD 21702, USA. yoshino@mail.ncifcrf.gov
Mechanisms of Development
|April 5, 2001
Summary
Secreted Frizzled-related protein-1 (sFRP-1) inhibits kidney development by blocking Wnt-4 signaling, while sFRP-2 counteracts this effect, promoting tubule formation during renal organogenesis.
Area of Science:
- Developmental Biology
- Molecular Biology
- Nephrology
Background:
- Wnt-4 signaling is crucial for kidney development, particularly the epithelial conversion of metanephric mesenchyme.
- Secreted Frizzled-related proteins (sFRPs) modulate Wnt signaling and are expressed in the developing kidney.
Purpose of the Study:
- To investigate the roles of sFRP-1 and sFRP-2 in regulating kidney development via Wnt signaling.
- To determine the specific effects of sFRP-1 and sFRP-2 on metanephric organogenesis.
Main Methods:
- Recombinant sFRP-1 and sFRP-2 were applied to cultured embryonic rat kidneys (metanephroi).
- Effects on tubule formation, bud branching, and epithelial conversion were assessed.
- Wnt signaling pathway activity was evaluated by measuring TCF DNA-binding activity.
Main Results:
- sFRP-1 significantly inhibited tubule formation and bud branching in metanephroi cultures.
- Co-treatment with sFRP-2 partially restored tubular differentiation and bud branching, suggesting an antagonistic role.
- sFRP-1 blocked mesenchymal epithelial conversion and Wnt target gene expression, while sFRP-2 did not affect TCF activation.
Conclusions:
- sFRP-1 and sFRP-2 appear to compete locally to regulate Wnt signaling during renal organogenesis.
- sFRP-1 may prevent inappropriate development or maintain progenitor cells, while sFRP-2 may promote tubulogenesis by enabling Wnt-4 signaling.
- These findings highlight the complex interplay of sFRPs in controlling kidney development.
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