Extracellular Viral MicroRNAs As Biomarkers of Virus Infection in Human Cells

Overview

Journal Mol Ther Nucleic Acids

Publisher Cell Press

Date 2025 Feb 3

PMID 39897577

Authors

Cheryl Chan

Joanne Xin Yi Loh

Wei-Xiang Sin

Denise Bei Lin Teo

Nicholas Kwan Zen Tan

Chandramouli Nagarajan

Yunxin Chen

Francesca Lorraine Wei Inng Lim

Michael E Birnbaum

Rohan B H Williams

Stacy L Springs

Affiliations

Soon will be listed here.

Abstract

Nucleic acid amplification tests (NAATs) have enabled fast and sensitive detection of virus infections but are unable to discriminate between live and dead/inert viral fragments or between latent and reactivated virus infections. Here, we show that extracellular viral microRNAs (viral exmiRs) are cell-free candidate biomarkers of live, latent, and reactivated virus infections, achieving fast (under 1 day) and sensitive (30 attomolar [aM]) detection by quantitative real-time reverse transcription PCR (real-time RT-qPCR). We report that spent-media-derived Epstein-Barr virus (EBV) miR-BART10-3p and herpes simplex virus 1 (HSV-1) miR-H5 are biomarkers of live EBV-2 and HSV-1 infection of T cell cultures, respectively. We identified extracellular human herpesvirus 6 (HHV-6) miR-Ro6-4 as a biomarker of endogenous latent HHV-6 in healthy human donor T cell cultures and identified human cytomegalovirus (HCMV) miR-US5-2-5p and miR-US22-5p as plasma biomarkers of endogenous latent HCMV infection. Viral exmiR profiling of spent media from EBV- and HHV-8-reactivated B cell models revealed specific signatures of elevated EBV miR-BHRF1-2-3p and HHV-8 miR-K12-10a-3p, miR-K12-10b, and miR-K12-12-3p, respectively, during virus reactivation. Our study thus suggests the utility of viral exmiR biomarkers in enabling NAAT-based detection of live, endogenous latent, and reactivated virus infections of cells.

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