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Updated: Nov 7, 2025
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Single-channel Analysis and Calcium Imaging in the Podocytes of the Freshly Isolated Glomeruli
Published on: June 27, 2015
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Cytoskeleton Rearrangements Modulate TRPC6 Channel Activity in Podocytes
Alexey Shalygin1, Leonid S Shuyskiy1, Ruslan Bohovyk2
1Institute of Cytology, Russian Academy of Sciences, 194064 Saint-Petersburg, Russia.
International Journal of Molecular Sciences
|April 30, 2021
Summary
The kidney
Area of Science:
- Nephrology and Cell Biology
Background:
- The actin cytoskeleton in podocytes is crucial for kidney filtration barrier function.
- Calcium influx via TRPC6 channels influences podocyte actin structure and barrier integrity.
Purpose of the Study:
- To investigate the feedback mechanism between the podocyte actin cytoskeleton and TRPC6 channel activity.
- To determine if actin cytoskeleton structure modulates TRPC6 channel function.
Main Methods:
- Scanning ion-conductance microscopy to assess podocyte migration.
- Cell-attached patch-clamp electrophysiology to measure TRPC6 channel activity.
- Co-expression studies in Chinese Hamster Ovary (CHO) cells.
Main Results:
- Disruption of the actin cytoskeleton with cytochalasin D enhanced TRPC6 channel activity in podocytes and CHO cells.
- Co-expression of mutant α-actinin-4 (K255E), which solidifies the actin network, decreased TRPC6 channel activity.
- Demonstrated a direct link between actin cytoskeleton organization and TRPC6 channel regulation.
Conclusions:
- The actin cytoskeleton directly modulates TRPC6 channel activity, establishing a feedback loop.
- This interaction is significant for maintaining kidney filtration barrier homeostasis.
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