Golgi polarization in a strong electric field

Area of Science:

• Cell Biology
• Biophysics
• Biochemistry

Background:

• Directional cell migration is crucial for biological processes and relies on cell polarization.
• The Golgi apparatus plays a vital role in cell polarization and migration by supplying membrane components to the leading edge.
• Direct current electric fields are known to induce directional cell migration across various cell types.

Purpose of the Study:

• To investigate the effect of direct current electric fields on Golgi polarization and cell migration in Chinese Hamster Ovary (CHO) cells.
• To determine the signaling pathways involved in electric field-induced Golgi polarization and cell migration.
• To assess whether electric fields can override other directional cues in cell migration.

Main Methods:

• Applying electric fields (300 mV/mm) to CHO cell cultures.
• Observing Golgi apparatus polarization and cell migration direction.
• Analyzing the involvement of Src and PI 3-kinase signaling pathways and actin polymerization.

Main Results:

• Electric fields of 300 mV/mm induced robust Golgi polarization and directional cell migration in CHO cells.
• Asymmetric Src and PI 3-kinase signaling, along with actin polymerization, were essential for this response.
• Golgi polarization occurred concurrently with cell migration and reinforced electrotaxis.
• Cell migration and Golgi polarization followed the electric field direction, ignoring wound-healing cues.

Conclusions:

• A 300 mV/mm electric field is a predominant cue for Golgi polarization and directional cell migration in CHO cells.
• The process is mediated by PI 3-kinase and Src signaling pathways.
• Electric fields effectively direct cell migration, overriding conflicting directional signals.