Protocol for electrical modulation of ERK signaling dynamics in cell lines

Area of Science:

• Cellular biology
• Biophysics
• Molecular signaling

Background:

• The extracellular signal-regulated kinases (ERK) pathway is crucial for cellular processes.
• Modulating signaling pathways in real-time is challenging without invasive methods.
• Existing methods often require chemical treatments or genetic manipulation.

Purpose of the Study:

• To develop a non-invasive protocol for modulating the dynamics of the ERK pathway.
• To establish a real-time reporter system for intracellular ERK activity.
• To demonstrate the application of customized alternating current (AC) electric fields in controlling cellular signaling.

Main Methods:

• Utilized a custom-built alternating current (AC) electric field stimulation chamber.
• Employed an ERK translocation reporter for live-cell imaging.
• Quantified ERK activation by measuring the ratio of nuclear to cytosolic fluorescence.
• Assessed pathway dynamics in real-time without chemical agents or gene disruption.

Main Results:

• Successfully modulated ERK pathway dynamics using AC electric fields.
• Demonstrated real-time monitoring of intracellular ERK activity via fluorescence.
• Established a non-invasive method for assessing ERK activation.
• Validated the protocol's applicability to other signaling pathways.

Conclusions:

• AC electric field stimulation offers a novel, non-invasive approach to modulate cellular signaling pathways like ERK.
• The ERK translocation reporter system provides accurate, real-time insights into pathway activity.
• This protocol has broad potential applications in cell biology research and drug discovery.