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Association of SIRT1 and tumor suppressor gene TAp63 expression in head and neck squamous cell carcinoma.
Kikuchi, Keiji; Noguchi, Akira; Kasajima, Rika; Miyagi, Yohei; Hoshino, Daisuke; Koshikawa, Naohiko; Kubota, Akira; Yokose, Tomoyuki; Takano, Yasuo.
Afiliación
  • Kikuchi K; Molecular Cell Biology Division, Kanagawa Cancer Center Research Institute, 2-3-2 Nakao, Asahi-ku, Yokohama, 241-8515, Japan. kei@gancen.asahi.yokohama.jp.
  • Noguchi A; Department of Pathology, Kanagawa Cancer Center, Yokohama, Japan.
  • Kasajima R; Molecular Cell Biology Division, Kanagawa Cancer Center Research Institute, 2-3-2 Nakao, Asahi-ku, Yokohama, 241-8515, Japan.
  • Miyagi Y; Molecular Pathology Division, Kanagawa Cancer Center Research Institute, Yokohama, Japan.
  • Hoshino D; Molecular Cell Biology Division, Kanagawa Cancer Center Research Institute, 2-3-2 Nakao, Asahi-ku, Yokohama, 241-8515, Japan.
  • Koshikawa N; Molecular Cell Biology Division, Kanagawa Cancer Center Research Institute, 2-3-2 Nakao, Asahi-ku, Yokohama, 241-8515, Japan.
  • Kubota A; Department of Head and Neck Cancer, Kanagawa Cancer Center, Yokohama, Japan.
  • Yokose T; Department of Pathology, Kanagawa Cancer Center, Yokohama, Japan.
  • Takano Y; Molecular Cell Biology Division, Kanagawa Cancer Center Research Institute, 2-3-2 Nakao, Asahi-ku, Yokohama, 241-8515, Japan.
Tumour Biol ; 36(10): 7865-72, 2015 Sep.
Article en En | MEDLINE | ID: mdl-25946975
ABSTRACT
Expression of the protein deacetylase SIRT1 is associated with either poor or favorable prognosis in cancer patients, depending on the cancer type. In head and neck squamous cell carcinoma (HNSCC), SIRT1 expression is associated with favorable prognosis. However, the molecular mechanism underlying the tumor-suppressive function of SIRT1 in HNSCC is unknown. SIRT1 promotes differentiation in epithelial cells; therefore, we investigated whether SIRT1 promotes differentiation in HNSCC cells by studying the correlations between the expression of SIRT1 and several genes implicated in stemness or differentiation in HNSCC-derived cell lines. Our results suggest that SIRT1 does not contribute to differentiation in HNSCC cells. RNA interference-mediated reduction of SIRT1 revealed that SIRT1 supports the expression of TAp63, which has been implicated in tumor suppression, in addition to epithelial differentiation. A positive correlation was observed between SIRT1 and TAp63 expression in HNSCC tissues, as determined by quantitative reverse transcription-polymerase chain reaction analysis of RNA extracted from formalin-fixed paraffin-embedded biopsy samples. Together, these results suggest that although SIRT1 does not regulate differentiation of HNSCC cells, it functions as a tumor suppressor in HNSCC by supporting the transcription of tumor-suppressive TAp63. This finding supports the notion that SIRT1-activating drugs could be useful for the treatment of HNSCC.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Factores de Transcripción / Carcinoma de Células Escamosas / Biomarcadores de Tumor / Diferenciación Celular / Proteínas Supresoras de Tumor / Sirtuina 1 / Neoplasias de Cabeza y Cuello Tipo de estudio: Prognostic_studies / Risk_factors_studies Límite: Humans Idioma: En Año: 2015 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Factores de Transcripción / Carcinoma de Células Escamosas / Biomarcadores de Tumor / Diferenciación Celular / Proteínas Supresoras de Tumor / Sirtuina 1 / Neoplasias de Cabeza y Cuello Tipo de estudio: Prognostic_studies / Risk_factors_studies Límite: Humans Idioma: En Año: 2015 Tipo del documento: Article