Involvement of EphA2 in head and neck squamous cell carcinoma: mRNA expression, loss of heterozygosity and immunohistochemical studies.

Rivera, Rosario S; Gunduz, Mehmet; Nagatsuka, Hitoshi; Gunduz, Esra; Cengiz, Beyhan; Fukushima, Kunihiro; Beder, Levent Bekir; Pehlivan, Davut; Yamanaka, Noboru; Shimizu, Kenji; Nagai, Noriyuki

Rivera, Rosario S; Gunduz, Mehmet; Nagatsuka, Hitoshi; Gunduz, Esra; Cengiz, Beyhan; Fukushima, Kunihiro; Beder, Levent Bekir; Pehlivan, Davut; Yamanaka, Noboru; Shimizu, Kenji; Nagai, Noriyuki.

Afiliación

Rivera RS; Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama City 700-8528, Japan.

Oncol Rep ; 19(5): 1079-84, 2008 May.

Article en En | MEDLINE | ID: mdl-18425361

RESUMEN

EphA2 is a 130-kDa transmembrane protein primarily found in adult human epithelial cells and is a member of one of the largest receptor tyrosine kinases. It is located on 1p36.1, a genetic hot spot in cancer. EphA2 overexpression has been observed in aggressive solid tumors and its potential role in tumorigenesis, which includes cell growth, survival, migration and angiogenesis have been reported. However, the role of EphA2 remains unknown in head and neck cancer. In this study, we investigated the genetic profile of EphA2 in primary head and neck squamous cell carcinoma (HNSCC) by determining mRNA level, status of loss of heterozygosity and protein expression. mRNA expression was also correlated with clinicopathological data. Infrequent loss of heterozygosity (20%) was observed, though a 10-fold increase of mRNA expression in tumors compared to normal tissues was noted. A significant number of samples with normal to high mRNA expression was observed among patients with regional metastasis, with T3-T4 tumor size and with moderate to poor differentiation. However, statistical studies did not show any correlation between mRNA expression and any of the clinicopathological parameters. Tumor cells expressed EphA2 protein, but only weakly. These results suggest that EphA2 might be involved in the early development of HNSCC although not directly responsible for its progression.

Asunto(s)

Carcinoma de Células Escamosas/genética; Carcinoma de Células Escamosas/metabolismo; Regulación Neoplásica de la Expresión Génica; Neoplasias de Cabeza y Cuello/genética; Neoplasias de Cabeza y Cuello/metabolismo; Pérdida de Heterocigocidad; ARN Mensajero/metabolismo; Receptor EphA2/biosíntesis; Receptor EphA2/genética; Anciano; Femenino; Perfilación de la Expresión Génica; Humanos; Ligandos; Masculino; Persona de Mediana Edad; Modelos Genéticos; Metástasis de la Neoplasia

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: ARN Mensajero / Carcinoma de Células Escamosas / Regulación Neoplásica de la Expresión Génica / Pérdida de Heterocigocidad / Receptor EphA2 / Neoplasias de Cabeza y Cuello Límite: Aged / Female / Humans / Male / Middle aged Idioma: En Revista: Oncol Rep Asunto de la revista: NEOPLASIAS Año: 2008 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Grecia

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