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Neuronal characteristics in embryonic renal stroma
K Sainio1, D Nonclercq, M Saarma
1Department of Pathology, University of Helsinki, Finland.
The International Journal of Developmental Biology
|March 1, 1994
Summary
Kidney stromal cells express neurofilament proteins, distinguishing them from neuronal cells during kidney development. These cells have a low proliferation rate, suggesting a supportive role in renal morphogenesis.
Area of Science:
- Developmental biology
- Cell biology
- Nephrology
Background:
- The metanephric mesenchyme differentiates into nephron epithelial cells and renal stroma.
- The molecular identity of renal stromal cells during kidney development is not fully understood.
Purpose of the Study:
- To investigate the molecular characteristics of renal stromal cells.
- To identify cell types involved in kidney morphogenetic processes.
Main Methods:
- In situ hybridization for neurofilament light protein mRNA.
- Immunohistochemistry for neurofilament light and medium proteins.
- Immunohistochemistry for L1 neural cell adhesion protein.
- Bromodeoxyuridine incorporation for proliferation analysis.
Main Results:
- Peritubular renal stromal cells express neurofilament light and medium proteins.
- Stromal cells are neurofilament-positive and L1 neural cell adhesion protein-negative.
- Renal microganglion neurons are neurofilament-positive and L1 neural cell adhesion protein-positive.
- Stromal cell proliferation is low compared to tubular cells.
Conclusions:
- Renal stromal cells represent a distinct cell population with neurofilament expression.
- These stromal cells can be molecularly differentiated from renal ganglion neurons.
- The low proliferation rate suggests a role beyond rapid cell division in kidney development.