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Live Cell Response to Mechanical Stimulation Studied by Integrated Optical and Atomic Force Microscopy
Published on: October 4, 2010
Universal physical responses to stretch in the living cell
Xavier Trepat1, Linhong Deng, Steven S An
1Program in Molecular and Integrative Physiological Sciences, Harvard School of Public Health, Boston, Massachusetts 02115, USA.
Nature
|June 1, 2007
Summary
Cells respond to stretching, like during heartbeats, with a universal fluidization of their cytoskeleton. This suggests physical forces, not just signaling, govern cell behavior, revealing simple laws in cell biology.
Area of Science:
- Cell Biology
- Soft Matter Physics
- Biophysics
Background:
- Cells experience significant mechanical stretch during physiological processes.
- Mechanical stretch is a known regulator of cell growth, differentiation, migration, and gene expression.
Purpose of the Study:
- To investigate the cellular response to transient mechanical stretch.
- To identify universal principles governing cell behavior under mechanical stress.
Main Methods:
- Experimental application of transient stretch to various cell types.
- Analysis of cytoskeletal dynamics and material properties.
- Development of physical models to describe cellular responses.
Main Results:
- A universal fluidization of the cytoskeleton was observed in response to transient stretch.
- This response is mediated by physical forces, not solely specific signaling pathways.
- The cell interior behaves as a crowded, fragile soft material.
Conclusions:
- Cellular response to stretch follows simple, universal phenomenological laws.
- These laws emerge from the interplay of biochemistry, molecular crowding, and physical forces.
- Findings bridge cell biology and soft matter physics, highlighting the role of physical forces in cellular regulation.
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