Related Experiment Video
Updated: May 24, 2025
10:08
Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
Published on: October 24, 2017
9.1K
Synthesis Method and High Salt Concentration Can Affect Electrodeformation of GUVs under Strong Pulsed DC Fields
Mohammad Maoyafikuddin1, Shrikrishna V Kulkarni2, Rochish M Thaokar3
1Centre for Research in Nanotechnology & Science, Indian Institute Technology of Bombay, Mumbai 400076, India.
ACS Omega
|March 3, 2025
Summary
Giant unilamellar vesicles (GUVs) electroporation depends on synthesis method and internal salt concentration. Extrapolating GUV results to biological cells requires caution due to differing electrohydrodynamic behaviors.
Area of Science:
- Biophysics
- Membrane Electroporation
- Soft Matter Physics
Background:
- Giant unilamellar vesicles (GUVs) are crucial biomimetic models for studying cell membrane behavior.
- Electroporation, the formation of temporary pores in membranes using electric fields, is vital for understanding cellular processes.
- The electrical properties of GUVs, influenced by internal and external fluid conductivities and salt concentrations, affect their response to electric fields.
Purpose of the Study:
- To investigate the influence of internal and external fluid conductivity ratios (β) and internal salt concentration (Cen) on GUV electroporation.
- To analyze the impact of GUV synthesis methods on their response to pulsed DC electric fields.
- To elucidate the electrohydrodynamic behavior of GUVs under varying salt concentrations and electric field conditions.
Main Methods:
- Utilizing strong pulsed DC electric fields to induce electrodeformation and electroporation in GUVs.
- Comparing GUVs synthesized via electroporation and gel-assisted methods.
- Analyzing GUV responses across low (Cen ≤ 0.3 mM) and high (Cen ≥ 25 mM) salt concentration regimes.
Main Results:
- GUV responses to pulsed DC fields in low salt conditions are sensitive to synthesis methods, potentially due to differences in membrane tension.
- Higher initial membrane tension in electroformed GUVs or greater edge tension in gel-assisted GUVs may explain synthesis-dependent responses.
- Salt concentration significantly alters GUV electrohydrodynamic behavior, affecting poration extent, pore growth, and shape deformation.
- High-salt GUVs exhibit faster electrical shorting and reduced pore growth, possibly due to abundant ions and increased edge tension.
Conclusions:
- GUV electroporation is a complex process influenced by both membrane properties and the ionic environment.
- Synthesis methods play a critical role in GUV response to electric fields, particularly at low salt concentrations.
- The electrohydrodynamic behavior and electroporation outcomes in GUVs differ qualitatively with salt concentration.
- Caution is advised when extrapolating findings from GUV electroporation studies to biological cells due to observed differences.
