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Biological cells with gap junctions in low-frequency electric fields

E C Fear1, M A Stuchly

  • 1Department of Electrical and Computer Engineering, University of Victoria, B.C., Canada. efear@ece.uvie.ca

IEEE Transactions on Bio-Medical Engineering
|June 30, 1998
PubMed
Summary
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Weak electromagnetic fields can affect cells through induced currents. This study uses the finite element method (FEM) to model transmembrane potential (TMP) in complex cell networks, revealing how gap junctions influence electrical behavior.

Area of Science:

  • Biophysics
  • Computational Biology
  • Electromagnetism

Background:

  • Biological effects from weak, low-frequency magnetic fields are documented.
  • Induced currents and electric fields are hypothesized mechanisms for these effects.
  • Cellular response to electric fields requires understanding induced potentials.

Purpose of the Study:

  • To investigate cellular behavior under electric field exposure.
  • To examine induced transmembrane potential (TMP) in complex cell models.
  • To evaluate the influence of gap junctions on electrical properties.

Main Methods:

  • Finite Element Method (FEM) for numerical simulation of TMP.
  • Modeling of gap-connected cell chains and clusters with varying geometries.

Related Experiment Videos

  • Analysis using a FEM solver focused on material conductivity for low frequencies.

    • Main Results:

    • FEM confirms gap-junction-connected cells can be modeled as a single unit.
    • Gap size and conductivity significantly influence interior potentials within cell configurations.
    • FEM provides TMP estimates for complex geometries where simpler models fail.

    Conclusions:

    • The FEM approach is effective for modeling TMP in intricate cellular arrangements.
    • Gap junctions play a crucial role in modulating electrical potentials in cell networks.
    • This method offers a valuable tool for studying cellular electrophysiology under electromagnetic fields.