3D Single-Virus Tracking: Advances in Methodology and Labeling Strategies Towards Probing the Virus-Epithelium...

Area of Science:

• Microbiology
• Biophysics
• Cell Biology

Background:

• Epithelial cells form a crucial barrier against viral infections.
• Mechanisms of viral penetration through epithelial barriers are not fully understood.

Purpose of the Study:

• To review advancements in single-virus tracking (SVT) methodologies.
• To assess SVT's capability in studying viral behavior in epithelial models.
• To discuss challenges and future directions for SVT in virus-epithelium interaction studies.

Main Methods:

• Survey of recent single-virus tracking (SVT) techniques, including image-based and active feedback approaches.
• Evaluation of advanced virus labeling strategies (fluorescent proteins, organic dyes, nanoparticles).
• Integration of optical instrumentation and molecular labeling for high-resolution viral dynamics.

Main Results:

• SVT can resolve viral dynamics with nanometer spatial and millisecond temporal precision.
• Progress in SVT enables visualization of viral processes like diffusion, receptor engagement, and internalization.
• Labeling strategies allow prolonged observation while maintaining viral infectivity.

Conclusions:

• Single-virus tracking (SVT) is a powerful tool for studying virus-epithelium interactions.
• SVT advancements illuminate critical viral entry and transport mechanisms.
• Future applications of SVT can extend to in situ and tissue-level studies for therapeutic development.