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Analysis of hydrostatic pressure-induced changes in umbrella cell surface area
Edward Wang1, Steven Truschel, Gerard Apodaca
1Department of Medicine, University of Pittsburgh, 982 Scaife Hall, 3550 Terrace Street, Pittsburgh, PA 15261, USA.
Methods (San Diego, Calif.)
|June 12, 2003
Summary
Bladder umbrella cells change shape and increase apical surface area when exposed to hydrostatic pressure. This response, crucial for understanding cellular mechanics, is calcium-dependent.
Area of Science:
- Cell Biology
- Biophysics
- Urology
Background:
- Cells respond to mechanical stimuli like hydrostatic pressure, affecting membrane trafficking.
- Bladder umbrella cells are ideal for studying how external forces impact membrane dynamics.
Purpose of the Study:
- To investigate how hydrostatic pressure affects the apical surface area and morphology of bladder umbrella cells.
- To develop a model system for studying mechanotransduction in umbrella cells.
Main Methods:
- A novel pressure chamber was designed to apply physiological hydrostatic pressure.
- Real-time changes in apical surface area were monitored using capacitance measurements.
- Cytoplasmic calcium levels were measured to assess their role in the response.
Main Results:
- Hydrostatic pressure increased umbrella cell apical surface area.
- Umbrella cells transitioned from cuboidal to squamous morphology under pressure.
- The observed changes were dependent on increased cytoplasmic calcium (Ca2+).
Conclusions:
- Hydrostatic pressure induces significant changes in bladder umbrella cell shape and surface area.
- The developed pressure chamber system enables real-time analysis of mechanotransduction.
- Further research can utilize this system to explore pathways regulating cell shape and membrane trafficking.