Scaling relationship and optimization of double-pulse electroporation

Area of Science:

• Biotechnology
• Cell Biology
• Bioengineering

Background:

• Electroporation efficacy varies widely in biological research and clinical settings.
• A generalized method to improve electroporation efficiency and cell viability simultaneously is lacking.
• Understanding the interplay between molecular delivery, cell viability, and electric pulse parameters is crucial.

Purpose of the Study:

• To develop a generalized approach for optimizing electroporation by mapping scaling relationships.
• To enhance molecular delivery efficiency and maintain cellular viability during electroporation.
• To identify optimal electric pulse parameters for improved electroporation functionality.

Main Methods:

• Utilized a two-phase electric pulse strategy: a precursor phase for permeabilization and a delivery phase for molecular transport.
• Employed Fluorescein-Dextran delivery into 3T3 mouse fibroblast cells as a model system.
• Analyzed extensive data using flow cytometry, correlating fluorescence intensity and cell death with pulse parameters.

Main Results:

• Molecular delivery efficiency showed a linear correlation with the second pulse duration, indicating the role of electrophoresis.
• Delivery efficiency exhibited a sigmoidal dependence on electric field strength.
• Cell death demonstrated a linear correlation with applied electrical energy, enabling identification of optimal field strength.

Conclusions:

• Established a generalized route to enhance electroporation functionality by understanding scaling relationships.
• Identified a critical transmembrane potential threshold for effective molecular delivery.
• The developed approach offers a pathway to simultaneously improve molecular delivery and cell viability in electroporation applications.