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EB virus-encoded RNAs are recognized by RIG-I and activate signaling to induce type I IFN
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EB virus-encoded RNAs are recognized by RIG-I and activate signaling to induce type I IFN
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Journal Article
EB virus-encoded RNAs are recognized by RIG-I and activate signaling to induce type I IFN
2006
Overview
Epstein–Barr virus (EBV)‐encoded small RNAs (EBERs) are nonpolyadenylated, untranslated RNAs, exist most abundantly in latently EBV‐infected cells, and are expected to show secondary structures with many short stem–loops. Retinoic acid‐inducible gene I (RIG‐I) is a cytosolic protein that detects viral double‐stranded RNA (dsRNA) inside the cell and initiates signaling pathways leading to the induction of protective cellular genes, including type I interferons (IFNs). We investigated whether EBERs were recognized by RIG‐I as dsRNA. Transfection of RIG‐I plasmid induced IFNs and IFN‐stimulated genes (ISGs) in EBV‐positive Burkitt's lymphoma (BL) cells, but not in their EBV‐negative counterparts or EBER‐knockout EBV‐infected BL cells. Transfection of EBER plasmid or
in vitro
‐synthesized EBERs induced expression of type I IFNs and ISGs in RIG‐I‐expressing, EBV‐negative BL cells, but not in RIG‐I‐minus counterparts. EBERs activated RIG‐I's substrates, NF‐κB and IFN regulatory factor 3, which were necessary for type I IFN activation. It was also shown that EBERs co‐precipitated with RIG‐I. These results indicate that EBERs are recognized by RIG‐I and activate signaling to induce type I IFN in EBV‐infected cells.
Publisher
John Wiley & Sons, Ltd,Nature Publishing Group UK,Springer Nature B.V
Subject
/ EBER
/ EBV
/ EMBO23
/ EMBO37
/ Green Fluorescent Proteins - genetics
/ Herpesvirus 4, Human - genetics
/ Herpesvirus 4, Human - pathogenicity
/ Humans
/ Interferon Regulatory Factor-3 - antagonists & inhibitors
/ Interferon Regulatory Factor-3 - genetics
/ Interferon Regulatory Factor-3 - metabolism
/ Interferon Type I - biosynthesis
/ Lymphoma
/ Proteins
/ Recombinant Proteins - genetics
/ RIG-I
/ RNA
/ RNA Helicases - antagonists & inhibitors
/ Viruses
