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Related Experiment Videos

Cell migration on cell-internalizable ligand microdepots: a phenomenological model.

Jane S Tjia1, Prabhas V Moghe

  • 1Department of Chemical and Biochemical Engineering, Rutgers University, Piscataway, NJ 08854, USA.

Annals of Biomedical Engineering
|September 11, 2002
PubMed
Summary

Collagen ligand-associated microdepots (LAMs) enhance skin cell migration. A new model reveals cell migration is controlled by LAM binding and internalization rates, optimizing cell activation for maximal migration.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Tissue Engineering

Background:

  • Collagen ligand-associated microdepots (LAMs) on polymer substrates enhance skin epidermal cell migration.
  • Understanding the dynamics of cell-LAM interactions is crucial for optimizing biomaterial design.

Purpose of the Study:

  • To examine the dynamics of cell-LAM interactions using a phenomenological model.
  • To investigate the differential effects of LAM-cell binding and LAM internalization.
  • To determine how LAM substrate density influences cell migration and LAM dynamics.

Main Methods:

  • Developed a phenomenological model based on experimental data of cell migration and LAM dynamics.
  • Solved the model to calculate rates of LAM binding and internalization at various LAM substrate densities.

Related Experiment Videos

  • Generated simulations of LAM binding and internalization rates under differential exogenous activation.

    • Main Results:

    • Model-computed LAM clearance dynamics closely matched experimental observations.
    • Identified that cell migration rate is sensitively governed by the rate of cellular sampling of LAMs (binding vs. internalization).
    • Maximal cell migration occurred at specific LAM presentation regimes that promoted concerted changes in cell activation via tyrosine kinase activity.

    Conclusions:

    • The developed model accurately predicts LAM clearance kinetics.
    • Cellular sampling dynamics, specifically the balance between LAM binding and internalization, are key regulators of cell migration.
    • Optimizing LAM presentation density is critical for maximizing cell migration and activation for tissue engineering applications.