MicroRNA 876-5p Modulates EV-A71 Replication Through Downregulation of Host Antiviral Factors

Overview

Journal Virol J

Publisher Biomed Central

Specialty Microbiology

Date 2020 Feb 7

PMID 32024541

Citations 5

Authors

Peng Xu

Hwa Xu

Hsu Sheng Cheng

Han-Hsiang Chan

Robert Y L Wang

Affiliations

Soon will be listed here.

Abstract

Background: Human enterovirus 71 (EV-A71) is a non-enveloped virus that has a single stranded positive sense RNA genome. In a previous study, we showed that miR-876-5p upregulation was observed in the serum of patients with severe EV-A71 infection. Micro-876-5p (miR-876-5p) is a circulating miRNA that can be identified to modulate EV-A71 infections through both in vitro and in vivo studies. However, the regulatory mechanisms that involve miR-876-5p in the EV-A71 infection cycle remain unclear.

Methods: We demonstrated that miR-876-5p facilitated EV-A71 replication and expression by overexpression and knocking-down of miR-876-5p through the transfection of miR-876-5p plasmid and miR-876-5p inhibitor. Although miR-876-5p suppressed CREB5 expression, luciferase reporter assay confirmed this. We also evaluated the role of miR-876-5p in the EV-A71 infection cycle by CREB5 mediated by transfection with an anti-miR-876-5P inhibitor or in combination with an si-CREB5 plasmid.

Results: MicroR-876-5p was upregulated in EV-A71-infected neuroblastoma cells. Overexpression of miR-876-5p or knockdown of cyclic-AMP responsive element binding protein 5 (CREB5) promoted EV-A71 replication. The downregulation of miR-876-5p inhibited the accumulation of viral RNA and the production of viral proteins. Interestingly, CREB5 overexpression also suppressed EV-A71 replication. Our in vitro studies reveal that miR-876-5p directly targets CREB5. Finally, downregulation of CREB5 protein abated the inhibitory effect of anti-miR-876-5p and induced inhibitory effect of EV-A71 replication.

Conclusions: Our results suggest that intracellular miR-876-5p promotes EV-A71 replication indirectly by targeting the host CREB5 protein.

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Role of Non-Coding RNA in Neurological Complications Associated With Enterovirus 71.

Yang F, Zhang N, Chen Y, Yin J, Xu M, Cheng X Front Cell Infect Microbiol. 2022; 12:873304.

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