Protocols for expression and functional analysis of viral microRNAs

Area of Science:

• Molecular Biology
• Virology
• Genetics

Background:

• MicroRNAs (miRNAs) are endogenous small RNA molecules regulating gene expression post-transcriptionally.
• Numerous DNA viruses encode miRNAs, potentially to control viral and host gene expression.
• The function of most viral miRNAs remains largely unknown, despite their prevalence.

Purpose of the Study:

• To review techniques for expressing viral microRNAs (miRNAs) in uninfected cells.
• To enable functional assessment of viral miRNAs as exogenous molecules.
• To clarify the roles of viral miRNAs, particularly those from herpesviruses.

Main Methods:

• Describing methods to achieve exogenous expression of viral miRNAs.
• Outlining techniques for validating viral miRNA expression and function.
• Focusing on herpesviruses as a model for viral miRNA studies.

Main Results:

• Viral miRNAs can be expressed exogenously in appropriate cell types.
• This exogenous expression allows for functional studies.
• Herpesviruses extensively utilize miRNA expression during infection.

Conclusions:

• Exogenous expression of viral miRNAs is a key tool for functional analysis.
• Understanding viral miRNA function is crucial, especially for herpesviruses.
• This review provides a methodological framework for viral miRNA research.