Cell cycle arrest and lytic induction of EBV-transformed B lymphoblastoid cells by a histone deacetylase inhibitor, Trichostatin A

  • Authors:
    • J. S. Seo
    • N. Y. Cho
    • H. R. Kim
    • T. Tsurumi
    • Y. S. Jang
    • W. K. Lee
    • S. K. Lee
  • View Affiliations

  • Published online on: January 1, 2008     https://doi.org/10.3892/or.19.1.93
  • Pages: 93-98
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Abstract

Latent infection of the Epstein-Barr virus (EBV) is strongly associated with the pathogenesis of several human tumor types. The restricted expression of the latent EBV antigens is critical for EBV-associated tumors to escape from immune surveillance. EBV lytic replication can be triggered by various treatments and the induced lytic genes cause strong cytotoxic T lymphocyte (CTL) responses. Histone acetylation or deacetylation is associated with chromatin remodeling and regulates gene expression. Histone deacetylase (HDAC) inhibitors affect cell cycle progression as well as gene expression in a wide variety of transformed cells. We examined whether an HDAC inhibitor, TSA, can affect cell cycle progression and induce EBV lytic replication in EBV-transformed lymphoblastoid cell lines (LCLs). TSA caused cell cycle arrest at low concentrations and induced apoptosis at higher (>300 nM) concentrations in the LCLs and EBV negative BJAB cells. To clarify the underlying mechanism of TSA-induced cell cycle arrest, expression of cell cycle regulatory factors was examined by RNase protection assay and Western blot analysis. Following TSA treatment, a reduced expression of cyclin D2 and an induction of p21 may have played an essential role for G1 arrest in LCLs, while p21 induction might have arrested BJAB cells in G1 phase. A Cdk inhibitor, p57, was increased by 300 nM TSA in both LCLs and BJAB cells, indicating its role in apoptosis. Moreover, immunofluorescene assay and Western blotting showed that TSA induced EBV lytic replication in LCL cells. These results suggest that TSA may exert an enhanced anti-tumor effect for EBV-associated tumors not only by inducing a cell cycle arrest and apoptosis, but also by triggering an EBV lytic cycle.

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January 2008
Volume 19 Issue 1

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Seo JS, Cho NY, Kim HR, Tsurumi T, Jang YS, Lee WK and Lee SK: Cell cycle arrest and lytic induction of EBV-transformed B lymphoblastoid cells by a histone deacetylase inhibitor, Trichostatin A. Oncol Rep 19: 93-98, 2008.
APA
Seo, J.S., Cho, N.Y., Kim, H.R., Tsurumi, T., Jang, Y.S., Lee, W.K., & Lee, S.K. (2008). Cell cycle arrest and lytic induction of EBV-transformed B lymphoblastoid cells by a histone deacetylase inhibitor, Trichostatin A. Oncology Reports, 19, 93-98. https://doi.org/10.3892/or.19.1.93
MLA
Seo, J. S., Cho, N. Y., Kim, H. R., Tsurumi, T., Jang, Y. S., Lee, W. K., Lee, S. K."Cell cycle arrest and lytic induction of EBV-transformed B lymphoblastoid cells by a histone deacetylase inhibitor, Trichostatin A". Oncology Reports 19.1 (2008): 93-98.
Chicago
Seo, J. S., Cho, N. Y., Kim, H. R., Tsurumi, T., Jang, Y. S., Lee, W. K., Lee, S. K."Cell cycle arrest and lytic induction of EBV-transformed B lymphoblastoid cells by a histone deacetylase inhibitor, Trichostatin A". Oncology Reports 19, no. 1 (2008): 93-98. https://doi.org/10.3892/or.19.1.93