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Cellogram: On-the-Fly Traction Force Microscopy.

Tobias Lendenmann1,2, Teseo Schneider2, Jérémie Dumas2,3

  • 1Laboratory of Thermodynamics in Emerging Technologies and #Institute for Mechanical Systems , ETH Zurich , Zurich 8092 , Switzerland.

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|September 21, 2019
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Summary
This summary is machine-generated.

This study introduces a novel software pipeline for rapid, reference-free traction force microscopy (TFM) to map cell forces in real-time. It enables dynamic monitoring of cellular mechanics during biological processes like cancer cell death and cell cycle progression.

Keywords:
Real time analysiscTFMfocal adhesionreference freestress fiberstraction force microscopy

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Area of Science:

  • Biophysics
  • Cell Biology
  • Computational Biology

Background:

  • Traction Force Microscopy (TFM) traditionally requires time-consuming cell deadhesion for force mapping.
  • Reference-free TFM methods offer real-time force map generation but need efficient algorithms.
  • Existing methods struggle to keep pace with dynamic biological processes.

Purpose of the Study:

  • To develop an integrated, automated software pipeline for rapid, reference-free TFM.
  • To enable on-the-fly force map generation from single TFM images.
  • To apply the method for real-time monitoring of cellular mechanical behavior.

Main Methods:

  • Developed an integrated software pipeline combining image processing, reference image estimation, and finite element analysis.
  • Implemented a reference-free approach for TFM, eliminating the need for cell deadhesion.
  • Utilized single TFM images for force map rendering within minutes of acquisition.

Main Results:

  • The pipeline generates force maps from single reference-free TFM images in seconds to minutes.
  • Successfully monitored cancer cell mechanical annihilation as a function of temperature, identifying a 45 °C threshold.
  • Mapped physically connected adhesion points by correlating forces across cells, revealing cell cycle-dependent length variations.

Conclusions:

  • The developed pipeline provides a robust, automated solution for real-time TFM.
  • Enables dynamic investigation of cellular mechanics in response to environmental changes and during cell cycle progression.
  • Offers a significant advancement for studying complex biological processes requiring rapid mechanical measurements.