Quantifying CD95/cl-CD95L Implications in Cell Mechanics and Membrane Tension by Atomic Force Microscopy Based Force...

Area of Science:

• Biophysics
• Cell Biology
• Materials Science

Background:

• Atomic force microscopy (AFM) images biological surfaces at the nanometer scale under physiological conditions.
• AFM measures forces and mechanics from single molecules to cell adhesion.
• Cellular mechanics, including elastic properties and membrane tension, are crucial for cell function.

Purpose of the Study:

• To present a methodology for quantifying cell elastic properties (Young's modulus) and cell membrane tension.
• To investigate how CD95/cl-CD95L interactions modulate these mechanical properties.

Main Methods:

• Coupling of nanoindentation and membrane tube pulling techniques using AFM.
• Decoration of AFM levers for specific molecular interactions.
• Measurement of Young's modulus and membrane tension.

Main Results:

• The study successfully quantified cell elastic properties and membrane tension.
• Modulation of these properties by CD95/cl-CD95L interactions was demonstrated.
• The developed methodology provides a quantitative approach to study cell mechanics.

Conclusions:

• The combined nanoindentation and membrane tube pulling AFM approach is effective for measuring cell mechanics.
• CD95/cl-CD95L interactions significantly impact cell elastic properties and membrane tension.
• This methodology advances the understanding of cell mechanical responses in biological processes.