Computational simulation of applying mechanical vibration to mesenchymal stem cell for mechanical modulation toward...

Area of Science:

• Biophysics
• Cellular Mechanics
• Biotechnology

Background:

• Understanding cell response to mechanical stimuli is crucial for modulating cell behavior in vitro.
• Mechanical vibration and oscillatory fluid flow are key biophysical signals for stem cell mechanical modulation.

Purpose of the Study:

• To investigate the combined effect of vibration and oscillatory fluid flow on mesenchymal stem cells (MSCs) and their components using numerical modeling.
• To identify optimal mechanical stimuli conditions for MSCs in vitro.

Main Methods:

• Utilized Finite Element Method (FEM) and Fluid-Structure Interaction (FSI) models for numerical simulations.
• Analyzed the mechanical response (stress and strain) of MSCs, including cytoplasm, nucleus, actin, and microtubule.
• Considered integrin and primary cilium as mechanoreceptors.

Main Results:

• The highest cell response (stress and strain) was observed at a specific frequency of mechanical vibration.
• The cell experiences shear stress in the range of [specific range] due to fluid flow.
• Mechanoreceptors on the cell surface are highly stimulated by hydrodynamic pressure, playing a role in MSC mechanical modulation.

Conclusions:

• The study provides insights into the mechanical modulation of MSCs under combined vibration and fluid flow.
• Results can optimize mechanical stimuli conditions in cell culture for future research.
• Findings contribute to understanding the mechanisms of mechanotransduction in stem cells.