Modulating SARS-CoV-2 Spike Protein Reactivity through Moderate Electric Fields: A Pathway to Innovative Therapies.

Area of Science:

• Biophysics
• Virology
• Materials Science

Background:

• Traditional biochemical methods for COVID-19 treatments face challenges with viral mutations.
• Simulations suggest external electric fields (E-fields) can reduce SARS-CoV-2 spike protein binding.
• Empirical data on E-field effects on spike protein structure and function is limited.

Purpose of the Study:

• To investigate the impact of low/moderate intensity E-field exposure on SARS-CoV-2 spike protein binding to the ACE2 receptor.
• To characterize structural changes in the spike protein after E-field treatment.
• To explore non-biochemical strategies for mitigating viral reactivity.

Main Methods:

• Enzyme-linked immunosorbent assay (ELISA) and quartz crystal microbalance (QCM) experiments to assess binding capacity.
• Dynamic light scattering (DLS) to measure surface zeta potential and confirm structural rearrangement.
• Circular dichroism (CD) spectroscopy to analyze alterations in secondary protein structures.

Main Results:

• A substantial reduction in SARS-CoV-2 spike protein binding capacity to ACE2 was observed after E-field treatment.
• E-field exposure induced significant protein structure rearrangement, evidenced by an enhanced negative surface zeta potential.
• CD spectroscopy confirmed changes in the secondary protein structures, indicating molecular alterations.

Conclusions:

• Electric field application is a viable physical strategy to modify SARS-CoV-2 spike protein structure and reduce its binding affinity.
• This approach offers potential for developing innovative, non-biochemical therapeutic and preventive strategies against current and future COVID-19 variants.
• Further research into E-field interactions with viral proteins could unlock new avenues in infectious disease control.