Differences in F9 and 5.51 cell elasticity determined by cell poking and atomic force microscopy

Area of Science:

• Cell Biology
• Biophysics
• Biochemistry

Background:

• Vinculin is a key protein in cell-cell and cell-matrix adhesion.
• Its role in cellular mechanical properties is not fully understood.
• Understanding vinculin's function is vital for cell mechanics research.

Purpose of the Study:

• To investigate the impact of vinculin deficiency on the elasticity of mouse embryonic carcinoma cells.
• To correlate mechanical measurements with the presence or absence of vinculin.
• To elucidate vinculin's contribution to the cytoskeletal network.

Main Methods:

• Utilized a wild type (F9) and a vinculin-deficient (5.51) mouse embryonic carcinoma cell line.
• Employed cell poking with a glass stylus to measure cellular resistance to indentation.
• Applied atomic force microscopy (AFM) for high-resolution elasticity mapping (128 x 128 force scans).

Main Results:

• Vinculin-deficient cells (5.51) exhibited approximately 20% less resistance to indentation compared to wild type F9 cells.
• AFM elasticity mapping revealed a direct correlation between localized elasticity and cell poking elastometric measurements.
• Results align with prior studies using AFM, rheology, and magnetometry.

Conclusions:

• Vinculin plays an integral role in maintaining the mechanical properties and elasticity of the cytoskeleton.
• The absence of vinculin significantly compromises cellular resistance to mechanical stress.
• These findings underscore vinculin's importance in cellular structural integrity and mechanics.