4.6 Article

Antitumor activity of suberoylanilide hydroxamic acid against human oral squamous cell carcinoma cell lines in vitro and in vivo

Journal

ORAL ONCOLOGY
Volume 45, Issue 9, Pages 766-770

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.oraloncology.2008.11.009

Keywords

Suberoylanilide hydroxamic acid (SAHA); Oral cancer; Cell cycle; p21; p53; Oral squamous cell calcinoma

Funding

  1. Ministry of Education, Culture, Sports, Science, and Technology of Japan

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It has been reported recently that histone deacetylase inhibitors (HDACIs) can block the growth of a variety of malignant tumor cells by reversing the silencing of the tumor suppressor genes; these will be the anticancer agents of the next generation. In this study, we evaluated the antitumor effects of the HDACI suberoylanilide hydroxamic acid (SAHA) on oral squamous cell carcinoma (OSCC) and investigated its molecular mechanism. SAHA suppressed the in vitro proliferation of OSCC cell lines in a dose- and time-dependent manner. Flow cytometric analyses showed that treatment with SAHA led to G1 phase cell-cycle arrest of OSCC cells, accompanying a decrease in the percentage of S-phase cells. Western blot analyses demonstrated that the expression of p21 protein was remarkably augmented and hyperacetylation of p53 was induced after SAHA treatment. These results suggest that administration of SAHA suppresses OSCC growth through G1 phase arrest. Additionally, we observed that the growth of xenograft SAS tumors in nude mice was significantly blocked by the administration of SAHA without major adverse effects. (C) 2008 Elsevier Ltd. All rights reserved.

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