Biophotonic tools for probing extracellular matrix mechanics

Area of Science:

• Biophysics
• Biomaterials Science
• Cell Biology

Background:

• The extracellular matrix (ECM) exhibits complex, hierarchical, and heterogeneous biomechanics essential for multicellular organism health.
• Understanding the distribution, dynamics, and origins of ECM biomechanics presents significant research challenges.
• Biophotonics techniques are emerging as powerful tools for investigating ECM biomechanics.

Purpose of the Study:

• To review the application of biophotonics techniques for interrogating ECM biomechanics.
• To highlight the capabilities of Raman spectroscopy and nonlinear microscopy in studying thick, living tissues.
• To demonstrate how these techniques provide insight into the ECM's response to mechanical stimuli.

Main Methods:

• Utilizing non-destructive, sub-micron resolution imaging.
• Employing Raman spectroscopy and nonlinear microscopy.
• Implementing techniques during mechanical testing of living tissues.

Main Results:

• High-speed, label-free imaging provides unprecedented insight into ECM biomechanics.
• Compositional and structural responses of the ECM to mechanical changes can be observed.
• These methods allow for the study of ECM in its native, hydrated state.

Conclusions:

• Biophotonics, specifically Raman spectroscopy and nonlinear microscopy, are effective for studying ECM biomechanics in living tissues.
• These techniques offer a label-free, high-resolution approach to understanding ECM's role in health and disease.
• Further application of these methods will advance our knowledge of tissue mechanics and biomaterial interactions.