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Method for Measurement of Viral Fusion Kinetics at the Single Particle Level
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Cell Membrane Derived Platform To Study Virus Binding Kinetics and Diffusion with Single Particle Sensitivity.

Nadia Peerboom1, Eneas Schmidt1, Edward Trybala2

  • 1Department of Physics , Chalmers University of Technology , Fysikgränd 3 , 412 96 Göteborg , Sweden.

ACS Infectious Diseases
|April 25, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a novel biosensing platform to analyze virus-cell membrane interactions at the single-particle level, aiding antiviral drug discovery. The platform effectively characterizes herpes simplex virus type 1 interactions and inhibition by heparin.

Keywords:
binding kineticsbiomimetic sensing platformherpes simplex virussingle particle trackingsupported lipid bilayersvirus−membrane interactions

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Area of Science:

  • Virology
  • Biophysics
  • Biotechnology

Background:

  • Antiviral therapy development requires understanding viral infection mechanisms and efficient drug screening.
  • Current methods often lack the resolution to study virus-cell membrane interactions at a single-particle level.

Purpose of the Study:

  • To develop and validate a biosensing platform for probing virus-cell membrane interactions at the single-particle level.
  • To investigate the role of specific viral and cellular components in herpes simplex virus type 1 (HSV-1) attachment and kinetics.
  • To assess the utility of the platform for antiviral compound screening, exemplified by heparin.

Main Methods:

  • Formation of supported lipid bilayers using cell membrane material.
  • Total internal reflection fluorescence microscopy (TIRFM) for visualizing and quantifying virus-membrane interactions.
  • Single particle tracking (SPT) to analyze viral diffusion dynamics.
  • Binding inhibition assays to determine drug efficacy (IC50).

Main Results:

  • Deletion of HSV-1 glycoprotein C (gC) or cell membrane heparan sulfate significantly reduced virion association and increased dissociation rates.
  • The biosensing platform successfully quantified the impact of these genetic modifications on interaction kinetics.
  • Heparin demonstrated antiviral activity, with an estimated IC50 value obtained through binding inhibition studies.
  • SPT revealed altered diffusive behavior of virus particles on the supported lipid bilayers.

Conclusions:

  • The developed biosensing platform offers a powerful tool for dissecting virus-membrane interactions at high resolution.
  • This platform complements existing assays and bridges the gap between simplified models and live-cell experiments.
  • It shows significant potential for advancing antiviral drug discovery and development by providing mechanistic insights.