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Viruses. 2018 Aug 19;10(8). pii: E440. doi: 10.3390/v10080440.

The Diverse Roles of microRNAs at the Host⁻Virus Interface.

Author information

1
Department of Microbiology & Immunology, McGill University, Montréal, QC H3G 1Y6, Canada. Annie.bernier@mail.mcgill.ca.
2
Department of Microbiology & Immunology, McGill University, Montréal, QC H3G 1Y6, Canada. selena.sagan@mcgill.ca.
3
Department of Biochemistry, McGill University, Montréal, QC H3G 1Y6, Canada. selena.sagan@mcgill.ca.

Abstract

MicroRNAs (miRNAs) are small, non-coding RNAs that regulate gene expression at the post-transcriptional level. Through this activity, they are implicated in almost every cellular process investigated to date. Hence, it is not surprising that miRNAs play diverse roles in regulation of viral infections and antiviral responses. Diverse families of DNA and RNA viruses have been shown to take advantage of cellular miRNAs or produce virally encoded miRNAs that alter host or viral gene expression. MiRNA-mediated changes in gene expression have been demonstrated to modulate viral replication, antiviral immune responses, viral latency, and pathogenesis. Interestingly, viruses mediate both canonical and non-canonical interactions with miRNAs to downregulate specific targets or to promote viral genome stability, translation, and/or RNA accumulation. In this review, we focus on recent findings elucidating several key mechanisms employed by diverse virus families, with a focus on miRNAs at the host⁻virus interface during herpesvirus, polyomavirus, retroviruses, pestivirus, and hepacivirus infections.

KEYWORDS:

Herpesviruses; hepaciviruses; immune evasion; latency; microRNAs; pestiviruses; polyomaviruses; retroviruses; viral RNA accumulation

PMID:
30126238
PMCID:
PMC6116274
DOI:
10.3390/v10080440
[Indexed for MEDLINE]
Free PMC Article

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