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Modeling assemblies of biological cells exposed to electric fields
1Department of Electrical and Computer Engineering, University of Victoria, BC, Canada. efear@ece.uvic.ca
IEEE Transactions on Bio-Medical Engineering
|October 17, 1998
Summary
Gap junctions electrically connect cells, influencing communication with electromagnetic fields. Detailed models show gap junctions add a bandstop filter, complicating cell assembly behavior, especially at higher frequencies.
Area of Science:
- Biophysics
- Cell Biology
- Electromagnetism
Background:
- Gap junctions are cell membrane channels facilitating intercellular communication.
- Cellular responses to electromagnetic (EM) fields are influenced by gap junction activity.
- Understanding these interactions is crucial for biological systems exposed to EM fields.
Purpose of the Study:
- To investigate the behavior of gap-junction-connected cells under electric field exposure.
- To determine the influence of gap junctions on cellular responses to EM fields.
- To compare detailed gap junction models with simpler equivalent cell models.
Main Methods:
- Utilized the finite element method (FEM) for complex, geometrically detailed cell models.
- Investigated responses to both direct current (dc) and time-harmonic electric fields.
- Varied gap junction properties (size, shape, conductivity) to assess their impact.
Main Results:
- Simple models suffice for small, dc-exposed cell configurations.
- Larger configurations and AC fields necessitate more complex models accounting for gap junctions.
- Gap junctions introduce a bandstop filter effect, altering frequency response and lowering relaxation frequency.
Conclusions:
- Gap junctions significantly complicate the electrical behavior of cell assemblies.
- Detailed modeling is required for accurate representation of gap-connected cells in EM fields.
- Findings provide insights into biological cell-EM field interactions.