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Seto, E. ; Moosmann, A. ; Grömminger, S. ; Walz, N.* ; Grundhoff, A.* ; Hammerschmidt, W.

Micro RNAs of Epstein-Barr virus promote cell cycle progression and prevent apoptosis of primary human B cells.

PLoS Pathog. 6, 69-70:e1001063 (2010)
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Cellular and viral microRNAs (miRNAs) are involved in many different processes of key importance and more than 10,000 miRNAs have been identified so far. In general, relatively little is known about their biological functions in mammalian cells because their phenotypic effects are often mild and many of their targets still await identification. The recent discovery that Epstein-Barr virus (EBV) and other herpesviruses produce their own, barely conserved sets of miRNAs suggests that these viruses usurp the host RNA silencing machinery to their advantage in contrast to the antiviral roles of RNA silencing in plants and insects. We have systematically introduced mutations in EBV's precursor miRNA transcripts to prevent their subsequent processing into mature viral miRNAs. Phenotypic analyses of these mutant derivatives of EBV revealed that the viral miRNAs of the BHRF1 locus inhibit apoptosis and favor cell cycle progression and proliferation during the early phase of infected human primary B cells. Our findings also indicate that EBV's miRNAs are not needed to control the exit from latency. The phenotypes of viral miRNAs uncovered by this genetic analysis indicate that they contribute to EBV-associated cellular transformation rather than regulate viral genes of EBV's lytic phase.
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Publication type Article: Journal article
Document type Scientific Article
Keywords ENCODED MICRORNAS; PROTEIN EXPRESSION; INFECTION; MIR-155; LATENCY; TARGETS; GENE; DETERMINANTS; REPLICATION; SPECIFICITY
Language english
Publication Year 2010
HGF-reported in Year 2010
ISSN (print) / ISBN 1553-7366
e-ISSN 1553-7374
Journal PLoS Pathogens
Quellenangaben Volume: 6, Issue: 8, Pages: 69-70, Article Number: e1001063 Supplement: ,
Publisher Public Library of Science (PLoS)
Reviewing status Peer reviewed
POF-Topic(s) 30203 - Molecular Targets and Therapies

30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Research field(s) Immune Response and Infection
PSP Element(s) G-501500-001
G-520700-001
G-501400-006
PubMed ID 20808852
Scopus ID 77958141684
Erfassungsdatum 2010-11-30