Electrical wound-healing assay for cells in vitro

Area of Science:

• Cell biology
• Biophysics
• Tissue engineering

Background:

• Confluent cell monolayers are susceptible to mechanical disruption, creating cell-free areas.
• Cell migration into these gaps, known as wound healing, is crucial for tissue repair and is typically studied using mechanical scratch assays.
• Traditional methods require microscopy to monitor cell movement into the damaged area.

Purpose of the Study:

• To introduce and validate an electrical method for studying cell migration and wound healing.
• To provide a reproducible and quantitative alternative to traditional wound-healing assays.
• To assess cell behavior following electrically induced disruption.

Main Methods:

• Cells cultured on electrodes were subjected to electrical currents, causing electroporation and cell death.
• Electric cell-substrate impedance sensing (ECIS) was used to monitor the cells before and after the electrical treatment.
• Cell migration and wound closure were quantitatively assessed by changes in electrode impedance.

Main Results:

• The electrical method successfully created a cell-free area, mimicking a wound.
• Impedance monitoring accurately tracked cell migration and the healing of the electrically induced wound.
• The results demonstrated high reproducibility and quantitative data comparable to traditional methods.

Conclusions:

• Electrical disruption and impedance sensing provide a robust and quantitative method for studying cell migration and wound healing.
• This electrical approach offers a reproducible alternative to mechanical scratch assays.
• The technique facilitates precise monitoring of cell behavior in response to induced tissue damage.