Freeze-etching observations of herpes simplex virus

Area of Science:

• Virology
• Cell Biology
• Microscopy

Background:

• Herpes simplex virus (HSV) causes various human infections.
• Understanding HSV replication at the cellular level is crucial for developing antiviral strategies.

Purpose of the Study:

• To investigate the ultrastructure of HSV-infected FL cells using freeze-etching.
• To elucidate the morphology of viral nucleocapsids and the process of virus release.

Main Methods:

• Herpes simplex virus was isolated and propagated in FL cells.
• Infected cells were cryoprotected with glycerol and processed for freeze-etching electron microscopy.
• Ultrastructural analysis was performed on the prepared samples.

Main Results:

• Viral nucleocapsids were identified within the nucleus of infected FL cells.
• The cores of the nucleocapsids were observed in three distinct forms.
• Capsomeres were clearly visualized, and virus release from the nucleus and plasmalemma was detailed.
• Associated cellular structures, including myeloid figures and lipid droplets, were also noted.

Conclusions:

• Freeze-etching provides clear visualization of HSV ultrastructure and replication processes.
• The study offers detailed morphological insights into HSV nucleocapsids and their release from infected cells.