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Generation of Multicue Cellular Microenvironments by UV-Photopatterning of Three-Dimensional Cell Culture Substrates
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An Attempt to Predict the Preferential Cellular Orientation in Any Complex Mechanical Environment.

Cédric P Laurent1, Jean-François Ganghoffer2, Rachid Rahouadj3

  • 1CNRS, LEMTA, UMR 7563, Université de Lorraine, 2 Avenue de la Forêt de Haye, 54502 Vandoeuvre-lès-Nancy, France. cedric.laurent@univ-lorraine.fr.

Bioengineering (Basel, Switzerland)
|September 28, 2017
PubMed
Summary

Cells align with mechanical forces in 3D environments. This study proposes cells orient along the direction of greatest stretch, offering insights into tissue anisotropy and scaffold design.

Keywords:
cell mechanicsmechanobiologymechanosensingnumerical simulationscaffold

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Mechanobiology

Background:

  • Cellular responses to mechanical stimuli, including differentiation and proliferation, are well-researched.
  • However, the directional alignment of cells in complex 3D mechanical environments remains largely unexplored.

Purpose of the Study:

  • To hypothesize and investigate the orientation of cells within 3D scaffolds under complex mechanical loading.
  • To establish a predictive model for cellular alignment based on mechanical cues.

Main Methods:

  • Formulation of a hypothesis: cells orient along the direction of unitary stretch derived from the right Cauchy-Green tensor.
  • Application of finite element analysis to simulate mechanical environments.
  • Computation of preferential cellular orientation based on mechanical loading.

Main Results:

  • The study explores implications of the hypothesis in various scenarios, including in vitro data and physiological conditions.
  • Demonstrates a correlation between mechanical stretch direction and cellular orientation.
  • Provides computed preferential cellular orientations for different loading conditions.

Conclusions:

  • Cellular orientation in 3D scaffolds is predictable based on mechanical stretch direction.
  • This finding is a foundational step towards understanding cell behavior in complex mechanical environments.
  • The predicted cellular orientation has significant implications for the anisotropy of biological tissues and scaffold engineering.