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Foxc2 is essential for podocyte function

Daniel Nilsson1, Mikael Heglind1, Zahra Arani1

  • 1Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.

Physiological Reports
|May 8, 2019
PubMed

Insights

Foxc2 deletion in podocytes causes severe kidney failure and proteinuria in mice. This highlights Foxc2

Area of Science:

  • Nephrology
  • Developmental Biology
  • Genetics

Background:

  • Foxc2 is an early marker of podocyte development in the glomerulus.
  • Global deletion of Foxc2 leads to embryonic lethality.
  • Investigating Foxc2's role in podocytes requires conditional deletion models.

Purpose of the Study:

  • To investigate the specific role of Foxc2 in mature podocyte function.
  • To understand the consequences of podocyte-specific Foxc2 loss.
  • To identify downstream targets of Foxc2 in podocytes.

Main Methods:

  • Generation of mice with podocyte-specific Foxc2 deletion.
  • Histological analysis of kidney tissue to assess podocyte injury.
  • Protein analysis to identify changes in glomerular proteins.
  • In vitro studies to confirm gene regulation.

Main Results:

  • Podocyte-specific Foxc2 deletion resulted in rapid onset of proteinuria and kidney failure.
  • Observed podocyte foot process effacement and slit diaphragm disruption.
  • Reduced glomerular expression of Neuropilin 1 (Nrp1), a Foxc2 target gene.
  • Podocyte-specific Nrp1 ablation did not cause proteinuria, suggesting limited podocyte role.

Conclusions:

  • Foxc2 is essential for maintaining podocyte structure and function.
  • Disruption of Foxc2 leads to severe podocyte injury and kidney failure.
  • Foxc2 regulates key proteins involved in glomerular integrity, including Nrp1, though Nrp1's primary role may lie elsewhere.
Keywords:
Foxc2Nrp1podocyteproteinuria

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