Reversible inhibition of herpes simplex virus replication by hydroxyurea

Area of Science:

• Virology
• Molecular Biology
• Pharmacology

Background:

• Herpes simplex virus (HSV) infection relies on viral DNA replication for progeny production.
• Understanding the mechanisms of viral replication is crucial for developing antiviral therapies.

Purpose of the Study:

• To investigate the effect of hydroxyurea on herpes simplex virus DNA replication and viral progeny synthesis.
• To determine if viral structural peptide synthesis occurs independently of viral DNA replication.

Main Methods:

• Infection of cells with HSV.
• Treatment of infected cells with hydroxyurea (5 x 10(-2) M).
• Monitoring of viral DNA replication, viral structural peptide synthesis, and infectious virus progeny production.

Main Results:

• Hydroxyurea effectively inhibited herpes simplex deoxyribonucleic acid (DNA) replication in infected cells.
• Inhibition of DNA replication prevented the synthesis of infectious virus progeny.
• Viral structural peptides were synthesized even when DNA replication was inhibited, indicating transcription from parental viral DNA.
• The inhibitory effect of hydroxyurea was reversible, with virus progeny reappearing 3 hours after drug removal.

Conclusions:

• Hydroxyurea is a potent inhibitor of herpes simplex virus DNA replication.
• Viral structural peptide synthesis is dependent on information transcribed from parental viral DNA genomes.
• The findings suggest that targeting viral DNA replication is a viable strategy for antiviral development.