No role for Epstein-Barr virus in Dutch hepatocellular carcinoma: a study at the DNA, RNA and protein levels

J Gen Virol. 2003 Jul;84(Pt 7):1863-1869. doi: 10.1099/vir.0.19217-0.

Abstract

Epstein-Barr virus (EBV) has been suggested to play a role in hepatocellular carcinoma (HCC). However, reports on detailed EBV transcript analyses in HCCs are limited. It was shown recently that expression of the transforming BARF1 (BamHI A rightward open reading frame 1) gene of EBV is restricted to latently EBV-infected epithelial malignancies, i.e. nasopharyngeal carcinoma and gastric carcinoma. The aim of this study was to test the presence of EBV in Dutch HCCs. A semiquantitative DNA PCR-enzyme immunoassay (PCR-EIA) for the BamHI W fragment of EBV was used to assess the presence of EBV in frozen and paraffin-embedded tissues of 16 HCCs. In addition, several RNA detection techniques, i.e. nucleic acid sequence-based amplification (NASBA), RT-PCR, RNA in situ hybridization (RISH) and immunohistochemistry (IHC), were applied. Five of 16 HCCs and two of four hepatitis C virus hepatitis samples were weakly positive for EBV DNA by PCR-EIA. Using sensitive RNA transcription techniques, no transcripts were found for BARF1, EBNA-1 and BARTs (BamHI A rightward transcripts) in any of the liver tissues tested. In addition, RISH for EBER1/2 and BARTs and IHC for EBNA-1, LMP-1 and ZEBRA, performed on the paraffin-embedded tissue of the PCR-EIA-positive cases and on adjacent non-neoplastic liver tissues, were negative. The absence of epithelial-specific BARF1 transcripts and other EBV transcripts and proteins in the EBV DNA PCR-positive cases argues strongly against a role for EBV in HCC.

MeSH terms

  • Carcinoma, Hepatocellular / virology*
  • DNA, Viral / analysis
  • Deoxyribonuclease BamHI / metabolism
  • Epstein-Barr Virus Infections / virology*
  • Herpesvirus 4, Human / genetics
  • Herpesvirus 4, Human / isolation & purification*
  • Humans
  • Immunoenzyme Techniques
  • Immunohistochemistry
  • Liver / metabolism
  • Liver / virology
  • Liver Neoplasms / virology*
  • Netherlands
  • Polymerase Chain Reaction / methods
  • RNA, Viral / analysis
  • Reverse Transcriptase Polymerase Chain Reaction
  • Self-Sustained Sequence Replication
  • Viral Proteins / metabolism

Substances

  • DNA, Viral
  • RNA, Viral
  • Viral Proteins
  • Deoxyribonuclease BamHI