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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
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Measuring the Mechanical Properties of Living Cells Using Atomic Force Microscopy
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Finite Element Modelling of Single Cell Based on Atomic Force Microscope Indentation Method.

Lili Wang1,2, Li Wang1,2, Limeng Xu1,2

  • 1Shanxi Key Laboratory of Material Strength & Structural Impact, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.

Computational and Mathematical Methods in Medicine
|January 15, 2020
PubMed
Summary
This summary is machine-generated.

Cell stiffness, crucial for cancer metastasis, was quantified using finite element method (FEM) models. FEM simulations revealed the cytoskeleton, not intermediate filaments, significantly impacts cell stiffness.

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Area of Science:

  • Cellular biomechanics
  • Biophysics
  • Cancer cell mechanics

Background:

  • Cell stiffness is a critical mechanical property linked to cancer cell functions like metastasis.
  • Quantifying single-cell stiffness is challenging due to low survival rates and measurement uncertainties.

Purpose of the Study:

  • To develop and validate finite element method (FEM) models for predicting single cancer cell stiffness.
  • To investigate the contribution of cellular components, specifically intermediate filaments (IFs) and cytoskeleton (CSK), to overall cell stiffness.
  • To analyze the influence of material properties on cellular mechanical responses.

Main Methods:

  • Utilized atomic force microscopy (AFM) indentation to obtain cell topography for FEM model geometry.
  • Developed two novel FEM models to simulate cell deformation and predict stiffness.
  • Validated FEM models against experimental data to ensure accuracy.

Main Results:

  • Cancer cell stiffness exhibits significant positional variations.
  • Intermediate filaments (IFs) have a minor contribution to overall stiffness (<10% strain) but facilitate force transfer.
  • The cytoskeleton (CSK) is identified as the primary determinant of cell mechanical properties.
  • Cellular continuum thickness and elasticity significantly influence stiffness; Poisson's ratio has minimal impact.

Conclusions:

  • The developed FEM models accurately quantify cellular stiffness and component contributions.
  • Findings highlight the dominant role of the cytoskeleton in cell mechanics.
  • Provides insights into cellular responses to mechanical stimuli and cancer biomechanics.