Protocol for evaluating extracellular matrix stiffness post-decellularization of triple-negative breast cancer cells...

Area of Science:

• Biomedical Engineering
• Cell Biology
• Materials Science

Background:

• Atomic Force Microscopy (AFM) is crucial for nanoscale measurements in biomedical research.
• Understanding extracellular matrix (ECM) mechanics is vital for cancer research.
• Cancer cells are known to alter the tumor microenvironment, including ECM stiffness.

Purpose of the Study:

• To present a detailed protocol for measuring the stiffness of ECM gels.
• To investigate the role of breast cancer cells in modulating ECM gel stiffness.
• To provide a method for quantifying nanomechanical properties of cell-enriched ECM.

Main Methods:

• Utilized Atomic Force Microscopy (AFM) with the PeakForce quantitative nanomechanics technique.
• Measured the elastic modulus and captured topology images of ECM gels.
• Incorporated breast cancer cells into artificial ECM gels for analysis.

Main Results:

• Successfully established a protocol for quantitative nanomechanical assessment of ECM gels.
• Demonstrated the ability to measure stiffness variations in ECM gels.
• Provided a method to evaluate cancer cell-induced changes in ECM stiffness.

Conclusions:

• The presented AFM protocol enables precise measurement of ECM gel stiffness.
• This technique can elucidate the contribution of cancer cells to ECM mechanical modulation.
• The protocol offers valuable insights into cancer cell-matrix interactions and tumor progression.