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Isolation and Quantification of Epstein-Barr Virus from the P3HR1 Cell Line
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The Epstein-Barr virus encoded BART miRNAs potentiate tumor growth in vivo

Jin Qiu1, Pamela Smith2, Leah Leahy2

  • 1Department of Pathology, Tufts University School of Medicine, Boston, Massachusetts, United States of America.

Plos Pathogens
|January 16, 2015
PubMed

Insights

Epstein-Barr virus (EBV) BART microRNAs promote tumor growth in vivo, not in vitro. Upregulation of all BART miRNAs, not specific ones, drives EBV-associated cancers.

Area of Science:

  • Virology
  • Oncology
  • Molecular Biology

Background:

  • Epstein-Barr virus (EBV) is linked to lymphomas and carcinomas.
  • EBV encodes approximately 30 BART microRNAs (miRNAs) with largely unknown functions.
  • The role of EBV BART miRNAs in cancer development requires further investigation.

Purpose of the Study:

  • To investigate the in vivo function of EBV BART miRNAs in carcinomagenesis.
  • To determine the effect of BART miRNAs on tumor growth, invasion, and metastasis.
  • To elucidate the mechanism by which BART miRNAs contribute to EBV-associated cancers.

Main Methods:

  • Development of a novel mouse xenograft model for EBV-driven carcinomagenesis.
  • Assessment of tumor growth, invasion, and metastasis in the xenograft model.
  • Analysis of BART miRNA expression patterns in relation to tumor development.

Main Results:

  • EBV BART miRNAs were found to potentiate tumor growth and development in vivo.
  • No significant effects on invasion or metastasis were observed.
  • Growth-promoting activity was specific to in vivo conditions and not observed in vitro.
  • In vivo tumor growth correlated with the upregulation of all BART miRNAs, not specific ones.

Conclusions:

  • Deregulated expression of EBV BART miRNAs is a key mechanism in EBV-associated oncogenesis.
  • BART miRNAs play a significant role in promoting tumor growth during EBV infection.
  • The findings highlight BART miRNAs as potential therapeutic targets in EBV-related cancers.

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