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IEEE Transactions on Bio-Medical Engineering

|September 25, 2023

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Researchers developed a low-cost cell stretcher enabling independent, unequal biaxial stretching for in vitro studies. This device precisely controls mechanical signals, revealing how distinct strain patterns alter cell morphology and orientation during live imaging.

Area of Science:

Biophysics
Cell Biology
Biomaterials Engineering

Background:

Cellular behavior is governed by complex chemical and mechanical cues.
In vitro models are essential for studying cell mechanics and disease progression.
Mimicking in vivo mechanical environments is critical for accurate cellular studies.

Purpose of the Study:

To develop and validate a cost-effective, pneumatically controlled cell stretcher.
To enable independent control of strain in two directions for unequal biaxial stretching.
To facilitate real-time microscopy during mechanical stimulation of cells.

Main Methods:

Utilized independent pneumatic channels controlled by electrical signals for stretching.
Employed finite element simulations to calculate membrane strain fields.

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Published on: June 2, 2019

Applied particle tracking algorithms and image processing for strain validation and cell morphology analysis.

Main Results:

Achieved uniaxial, equibiaxial, and unequal biaxial stretching with <1% strain error.
Demonstrated distinct cellular responses in orientation, length, and area to different stretching patterns.
Enabled precise strain application up to [Formula: see text] at a frequency of [Formula: see text].

Conclusions:

The developed device provides a uniform, variable strain field for cell experiments.
Real-time live cell imaging is feasible with the system.
This platform offers a scalable, low-cost method for mechanical stimulation and understanding cellular responses to bio-realistic strains.