Epstein-Barr virus latent membrane protein 1 induces CD69 expression through activation of nuclear factor-κB

Int J Oncol. 2013 May;42(5):1786-92. doi: 10.3892/ijo.2013.1871. Epub 2013 Mar 28.

Abstract

Latent membrane protein‑1 (LMP-1) of Epstein‑Barr virus (EBV) promotes tumorigenesis. Here, we report that LMP-1 activates the immunoregulatory molecule CD69 gene transcription through a nuclear factor-κB (NF-κB)‑dependent pathway. CD69 expression was upregulated in LMP-1‑expressing EBV-immortalized human B-cell lines and an EBV-positive Burkitt's lymphoma cell line. LMP-1 expression increased CD69 expression at the transcriptional level. CD69 promoter was regulated by LMP-1 activation of NF-κB via the carboxy-terminal activation region 1 and 2. Promoter deletion analysis indicated that two NF-κB binding sites are necessary for activation of the CD69 promoter. Electrophoretic mobility shift analysis demonstrated that LMP-1 activates both NF-κB binding sites in the CD69 promoter. This is the first report of the regulation of CD69 expression by LMP-1, and this novel finding may, thus, represent an important link between the EBV oncoprotein LMP-1 and its critical role in the development of EBV-associated diseases.

MeSH terms

  • Antigens, CD*
  • Antigens, Differentiation, T-Lymphocyte*
  • Binding Sites / genetics
  • Cell Line, Tumor
  • Cell Transformation, Neoplastic / genetics*
  • Gene Expression Regulation, Viral
  • Herpesvirus 4, Human / genetics
  • Herpesvirus 4, Human / metabolism
  • Humans
  • Lectins, C-Type*
  • NF-kappa B / metabolism*
  • Promoter Regions, Genetic
  • Signal Transduction
  • Transcriptional Activation
  • Up-Regulation
  • Viral Matrix Proteins* / genetics
  • Viral Matrix Proteins* / metabolism

Substances

  • Antigens, CD
  • Antigens, Differentiation, T-Lymphocyte
  • CD69 antigen
  • EBV-associated membrane antigen, Epstein-Barr virus
  • Lectins, C-Type
  • NF-kappa B
  • Viral Matrix Proteins