Mammalian alphaherpesvirus miRNAs.

Area of Science:

• Virology
• Molecular Biology
• Gene Regulation

Background:

• Mammalian alphaherpesviruses cause significant human and veterinary diseases.
• These viruses display complex gene expression during productive and latent infections.
• MicroRNAs (miRNAs) are increasingly recognized as key regulators in viral infections.

Purpose of the Study:

• To review and discuss microRNAs encoded by mammalian alphaherpesviruses.
• To explore the genomic location, expression patterns (productive vs. latent), potential targets, and functions of viral miRNAs.
• To examine the interplay between viral miRNAs and host miRNA machinery.

Main Methods:

• Literature review of published data on microRNAs from six mammalian alphaherpesviruses.
• Comparative analysis of miRNA characteristics across different viral species.
• Discussion of current knowledge gaps regarding viral miRNA targets and functions.

Main Results:

• MicroRNAs have been detected in five of six studied mammalian alphaherpesviruses (HSV-1, HSV-2, Herpes B virus, BHV-1, PRV), but not in Varicella Zoster Virus.
• Viral miRNAs are encoded within the viral genome and expressed during different infection phases.
• Limited information exists on the specific targets and functional roles of these viral miRNAs.

Conclusions:

• MicroRNAs play a role in the gene regulation strategies of mammalian alphaherpesviruses.
• Further research is needed to fully elucidate the targets, functions, and host interactions of viral miRNAs.
• Understanding viral miRNAs is crucial for comprehending viral pathogenesis and developing antiviral strategies.