Permeabilizing Cell Membranes with Electric Fields

Area of Science:

• Biophysics
• Oncology
• Cell Biology

Background:

• Exogenous electric fields have diverse biological impacts.
• Tumor treating fields (TTFields), a type of alternating electric field (AEF), are used clinically for cancers like glioblastoma.
• The standard mechanism of TTFields involves disrupting mitotic spindle formation.

Purpose of the Study:

• To provide a comprehensive review of AEFs' effects on cancer cell membranes.
• To explore mechanistic models beyond the standard mitotic spindle disruption theory.
• To reconcile inconsistencies in AEF parameters and propose future research directions.

Main Methods:

• Literature review of AEFs' biological impacts.
• Overview of three mechanistic models: voltage-gated ion channel, bioelectrorheological, and electroporation.
• Theoretical investigation into electric field inhomogeneities on cell membranes.

Main Results:

• The standard TTFields mechanism does not fully explain AEFs' effects on DNA and cell membranes.
• Three models (ion channel, bioelectrorheological, electroporation) offer potential explanations for AEFs' membrane effects.
• Discrepancies exist between TTFields parameters and proposed mechanistic models.

Conclusions:

• AEFs, particularly TTFields, have complex mechanisms of action on cancer cells, extending beyond mitotic disruption.
• Further research is needed to fully elucidate AEFs' effects on cell membranes and DNA.
• Understanding these mechanisms may lead to improved cancer treatment strategies.