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Microscale pressure measurements based on an immiscible fluid/fluid interface
Jing Yang1,2, Xing Duan3, Andrew K Fraser3
1Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA.
Scientific Reports
|December 29, 2019
Summary
Scientists developed a new microscale pressure measurement technique using fluid interfaces. This method accurately measures hydraulic pressure in tiny biological samples, revealing pressure build-up in epithelial tissues.
Area of Science:
- Biophysics
- Microfluidics
- Cell Biology
Background:
- Accurate measurement of hydraulic pressure at the microscale is crucial for understanding biological processes.
- Existing methods often lack the precision or applicability for small biological samples.
Purpose of the Study:
- To introduce a novel method for microscale pressure measurement.
- To demonstrate its application in biological systems, specifically in epithelial tissues and developing embryos.
Main Methods:
- Utilizing the curvature changes of an immiscible fluid/fluid interface to determine hydraulic pressure.
- Applying the technique to measure pressure in epithelial domes, organoids, and embryonic lumens.
Main Results:
- The method accurately measures pressure at the 10-micron scale.
- Pressure build-up across epithelial barriers was quantified (100-300 Pa).
- Ion channel activity was shown to modulate this pressure.
Conclusions:
- The proposed fluid interface method offers a precise tool for microscale hydraulic pressure sensing.
- This technique provides new insights into pressure dynamics within micro-scale biological environments.
- Findings highlight the role of ion channels in regulating pressure in epithelial tissues.
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