Correlation between cell migration and reactive oxygen species under electric field stimulation

Area of Science:

• Cell Biology
• Biophysics
• Biomedical Engineering

Background:

• Cell migration is crucial for organism development and maintenance.
• Electrotaxis (or galvanotaxis) describes cell movement in response to electric fields (EFs).
• Understanding factors influencing cell migration is vital for regenerative medicine and disease research.

Purpose of the Study:

• To investigate the combined effects of electric fields (EFs) and chemical stimuli on cell migration.
• To explore the role of reactive oxygen species (ROS) in mediating EF-induced cell migration.
• To develop a microfluidic platform for studying cellular responses to electrical and chemical gradients.

Main Methods:

• Development of a microfluidic chip capable of applying four distinct EF strengths and two chemical stimuli simultaneously.
• Utilizing NIH 3T3 fibroblasts to assess migration rates and intracellular ROS production.
• Employing an antioxidant (α-tocopherol) to investigate the role of ROS in cell migration.

Main Results:

• Both EF strength and β-lapachone concentration significantly increased NIH 3T3 fibroblast migration rate and ROS production.
• A dose-dependent relationship was observed between EF strength and both migration and ROS levels.
• A strong linear correlation was found between cell migration rate and intracellular ROS levels.
• α-tocopherol inhibited ROS production and consequently reduced cell migration rate.

Conclusions:

• Reactive oxygen species (ROS) are key mediators in the enhancement of cell migration by electric fields and β-lapachone.
• The developed microfluidic chip provides a versatile platform for studying cell migration under combined stimuli.
• This research offers insights into the mechanisms of electrotaxis and potential therapeutic targets for modulating cell migration.