침샘 선양낭성암종의 세포학적, 분자생물학적 특성에 관한 연구

CELLULAR AND MOLECULAR CHARACTERIZATION OF ADENOID CYSTIC CARCINOMA OF THE SALIVARY GLANDS

  • 박영욱 (강릉대학교 치과대학 구강악안면외과학교실)
  • Park, Young-Wook (Department of Oral and Maxillofacial Surgery, College of Dentistry, Kangnung National University)
  • 발행 : 2005.03.31

초록

Adenoid cystic carcinoma (ACC) of salivary glands has a protracted clinical course with perineural invasion, delayed onset of hematogenous metastasis, and poor responses to classical cytotoxic chemotherapic agents. Most deaths from salivary ACC are caused by lung metastases that are resistant to conventional therapy. Therefore, knowledge of cellular properties and tumor-host interactions that influence the dissemination of metastatic cells is important for the design of more effective therapy of salivary cancer. I determined in vitro expression of epidermal growth factor receptor (EGFR) and its downstream effectors and vascular endothelial growth factor receptor (VEGFR)-2 on a human salivary ACC cell line (ACC2). I also evaluated the expression of EGF and VEGF signaling molecules and metastasis-related proteins on human salivary ACC cells orthotopically growing in nude mice. In Western blot and immunohistochemical analyses, EGFR and VEGFR-2 were presented and phosphorylated in ACC2 cells. In human parotid cancer xenografts in nude mice, EGF and VEGF signaling molecules, IL-8, and MMP-9 were expressed at markedly higher levels than in normal parotid tissues. Moreover, tumor-associated endothelial cells of this orthotopic parotid tumor expressed phosphorylated VEGFR-2 and phosphorylated Akt, which is a cell-survival protein. These data show that those biomarkers can be molecular targets for therapy of salivary ACC, which has a propensity for delayed lung metastasis.

키워드

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