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Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy
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Mechanical Mapping of Spheroids Using Brillouin Spectroscopy.

Chloe B Rodgers1, Giedrė Astrauskaitė1, Rebecca E Ginesi1

  • 1Centre for the Cellular Microenvironment, Advanced Research Centre, 11 Chapel Lane, University of Glasgow.

Journal of Visualized Experiments : Jove
|December 29, 2025
PubMed
Summary

Brillouin spectroscopy offers a non-destructive way to measure the mechanical properties of 3D biological samples. This technique advances in vivo biophysics and disease diagnostics by assessing microscale mechanics within living spheroids.

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Area of Science:

  • Biophysics
  • Biomaterials Science
  • Optical Spectroscopy

Background:

  • Brillouin spectroscopy is an emerging technique for non-destructive, contact-free analysis of viscoelastic and architectural properties.
  • It measures mechanical properties of 3D samples by analyzing light interaction with acoustic waves.
  • Potential applications include in vivo biophysics assessment and disease pathology diagnosis.

Purpose of the Study:

  • To apply Brillouin micro-spectroscopy for investigating the biomechanics of living spheroids.
  • To detail a protocol for sample preparation, spectral measurements, and data analysis.
  • To demonstrate the technique's capability in a 3D microenvironment mimicking in vivo conditions.

Main Methods:

  • Utilized Brillouin micro-spectroscopy to probe mechanical properties of 3D cellular spheroids.
  • Embedded spheroids within a 3D hydrogel matrix to simulate in vivo cellular microenvironments.
  • Performed sequential fluorescence imaging alongside Brillouin spectral measurements.

Main Results:

  • Successfully applied Brillouin micro-spectroscopy to living spheroids in a 3D hydrogel matrix.
  • Acquired spectral data reflecting the biomechanical properties of the spheroid-hydrogel system.
  • Demonstrated the technique's ability to assess microscale mechanics within a 3D biological construct.

Conclusions:

  • Brillouin micro-spectroscopy is a powerful tool for studying the biomechanics of 3D cell cultures.
  • The method provides insights into cell-matrix interactions within a physiologically relevant 3D environment.
  • This technique holds promise for advancing biophysical studies and diagnostics in biomedical science.