Regeneration of Arrayed Gold Microelectrodes Equipped for a Real-Time Cell Analyzer

Area of Science:

• Biomedical Engineering
• Cell Biology
• Assay Development

Background:

• Label-free cell-based assays offer dynamic, physiological insights without animal use.
• Real-time cell analysis using electric impedance is gaining traction in biochemical studies.
• High costs associated with disposable gold microchips limit the practical application of these assays.

Purpose of the Study:

• To develop a generalizable strategy for regenerating gold microelectrodes used in commercial label-free cell analyzers.
• To reduce the economic barrier for researchers utilizing real-time cell assay technology.

Main Methods:

• A protocol involving trypsin digestion, ethanol and water rinsing, and a spinning step was developed.
• The regeneration method was applied to arrayed gold microelectrodes on commercial electronic plates.
• The effectiveness of regeneration was validated through repeated usage testing.

Main Results:

• The developed regeneration strategy successfully refurbished commercial gold microelectrode plates.
• Regenerated plates were effectively reused for label-free cell assays.
• The method demonstrated efficacy for at least three cycles of regeneration and usage.

Conclusions:

• A cost-effective protocol for regenerating gold microelectrodes in label-free cell analyzers has been established.
• This method significantly lowers the running costs of real-time cell assays.
• The regeneration strategy enhances the accessibility and practicality of label-free cell analysis.