Recent Issues in Varicella-Zoster Virus Latency.

Area of Science:

• Virology
• Neuroscience
• Immunology

Background:

• Varicella-zoster virus (VZV) causes chickenpox and shingles after latency in neurons.
• Understanding VZV latency is crucial for managing reactivation syndromes.

Purpose of the Study:

• To review recent advances in alphaherpesvirus latency, focusing on VZV ganglionic latency.
• To explore viral gene transcription, epigenetic regulation, and immunological aspects of VZV latency.

Main Methods:

• Review of recent literature on VZV latency.
• Analysis of viral gene transcription during latency.
• Investigation of epigenetic mechanisms regulating VZV gene expression.
• Examination of host immunity's role in VZV reactivation.

Main Results:

• VZV gene transcription during latency is highly restricted.
• Key transcripts include VZV gene 63 and a novel VZV transcript (VLT).
• Epigenetic regulation plays a significant role in VZV gene transcription.
• Inborn errors in host immunity can predispose individuals to VZV reactivation.

Conclusions:

• Recent research has clarified the restricted nature of VZV gene transcription during latency.
• Epigenetic mechanisms and host immunity are critical factors in VZV latency and reactivation.
• Further research into these areas will advance understanding and management of VZV-associated diseases.