Herpes simplex virus latency in isolated human neurons.

Area of Science:

• Neuroscience
• Virology
• Infectious Diseases

Background:

• Herpes simplex virus (HSV) establishes lifelong latency, primarily in peripheral nervous system ganglion neurons.
• Reactivation of latent HSV leads to recurrent disease, posing a significant health challenge.
• Understanding HSV latency mechanisms is crucial for developing effective antiviral strategies.

Purpose of the Study:

• To establish an in vitro model system for studying herpes simplex virus latency.
• To approximate the in vivo cell-virus interaction during HSV latency in human neurons.
• To provide a system for analyzing the HSV genome state during experimental latency in primary human neurons.

Main Methods:

• Human fetal sensory neurons were used as host cells.
• Neuronal origin of the cells was confirmed by detecting substance P and A2B5 antigen.
• HSV latency was induced by treating infected neurons with human leukocyte interferon and (E)-5-(2-bromovinyl)-2'-deoxyuridine for 7 days.

Main Results:

• An in vitro model for HSV latency was successfully constructed using human fetal sensory neurons.
• Latency was established by inhibiting viral gene expression with a combination of interferon and antiviral drug.
• The established latency was maintained for at least 9 days after inhibitor removal.

Conclusions:

• The developed in vitro model effectively mimics HSV latency in primary human neurons.
• This model system enables detailed analysis of the HSV genome during the establishment and maintenance of latency.
• Further research using this model can elucidate mechanisms of HSV persistence and reactivation.