Alterations in cellular expression in EBV infected epithelial cell lines and tumors

English version

Autoři: Rachel Hood Edwards ^aff001; Robert Dekroon ^aff001; Nancy Raab-Traub ^aff001
Působiště autorů: Lineberger Comprehensive Cancer Center University of North Carolina at Chapel Hill Chapel Hill, North Carolina, United States of America ^aff001; Department of Microbiology & Immunology University of North Carolina at Chapel Hill Chapel Hill, North Carolina, United States of America ^aff002
Vyšlo v časopise: Alterations in cellular expression in EBV infected epithelial cell lines and tumors. PLoS Pathog 15(10): e1008071. doi:10.1371/journal.ppat.1008071
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.ppat.1008071

Souhrn

The Epstein Barr virus (EBV) is linked to the development of two major epithelial malignancies, gastric carcinoma and nasopharyngeal carcinoma. This study evaluates the effects of EBV on cellular expression in a gastric epithelial cell line infected with or without EBV and a nasopharyngeal carcinoma cell line containing EBV. The cells were grown in vitro and as tumors in vivo. The effects on cellular expression were determined using both 2D DIGE proteomics and high throughput RNA sequencing. The data identify multiple pathways that were uniquely activated in vitro. RNA sequences mapping to the mouse genome were identified in both the EBV positive and negative tumor samples in vivo, although, differences between the EBV positive and negative cells were not apparent. However, the tumors appeared to be grossly distinct. The majority of the identified canonical pathways based on two fold changes in expression had decreased activity within the tumors in vivo. Identification of the predicted upstream regulating factors revealed that in vitro the regulating factors were primarily protein transcriptional regulators. In contrast, in vivo the predicted regulators were frequently noncoding RNAs. Hierarchical clustering distinguished the cell lines and tumors, the EBV positive tumors from the EBV negative tumors, and the NPC tumors from the gastric tumors and cell lines. The delineating genes were changed greater than 4 fold and were frequently regulated by protein transcription factors. These data suggest that EBV distinctly affects cellular expression in gastric tumors and NPC and that growth in vivo requires activation of fewer cellular signaling pathways. It is likely that the broad changes in cellular expression that occur at low levels are controlled by regulatory viral and cellular RNAs while major changes are affected by induced protein regulators.

Klíčová slova:

Gene expression – Gene regulation – Epstein-Barr virus – MicroRNAs – Enzyme regulation – Transcriptional control – Regulator genes – Nasopharyngeal carcinoma

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