β-catenin expression in areca quid chewing-associated oral squamous cell carcinomas and upregulated by arecoline in human oral epithelial cells.

doi:10.1016/j.jfma.2010.11.002

中山醫學大學機構典藏 CSMUIR > 口腔醫學院 > 牙醫學系暨碩士班 > 期刊論文 > Item 310902500/10570

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题名:	β-catenin expression in areca quid chewing-associated oral squamous cell carcinomas and upregulated by arecoline in human oral epithelial cells.
作者:	Lee, SS Tsai, CH Tsai, LL Chou, MC Chou, MY Chang, YC
贡献者:	中山醫學大學 http://dx.doi.org/10.1016/j.jfma.2010.11.002
日期:	2012
上传时间:	2015-03-30T10:23:03Z (UTC)
ISSN:	0929-6646
摘要:	Abstract BACKGROUND/PURPOSE: Nuclear localization of β-catenin is known to associate with malignant transformation of many squamous cell carcinomas. The aim of this study was to compare β-catenin expression in normal human oral epithelium and areca quid chewing associated oral squamous cell carcinomas (OSCCs) and further to explore the potential mechanisms that may lead to induce β-catenin expression. METHODS: A total of 40 areca quid chewing-associated OSCCs and 10 normal oral tissue biopsy samples without areca quid chewing were analyzed by immunohistochemistry. The oral epithelial cell line GNM cells were challenged with arecoline, a major areca nut alkaloid, by using Western blot analysis. Furthermore, extracellular signal-regulated protein kinase inhibitor PD98059, glutathione precursor N-acetyl-l-cysteine (NAC), tyrosine kinase inhibitor herbimycin-A, p38 inhibitor SB203580, and phosphatidylinositaol 3-kinase inhibitor LY294002 were added to find the possible regulatory mechanisms. RESULTS: β-catenin expression was significantly higher in OSCC specimens than that in normal oral epithelial specimens (p < 0.05). It was demonstrated that normal oral epithelium showed only membranous staining for β-catenin, and membranous staining was lost or reduced with an increase in cytoplasmic/nuclear staining in OSCCs. Arecoline was found to elevate β-catenin expression in a dose-dependent manner (p < 0.05). The addition of PD98059, NAC, herbimycin-A, SB203580, and LY294002 markedly inhibited the arecoline-induced β-catenin expression (p < 0.05). CONCLUSION: β-catenin expression is significantly upregulated in areca quid chewing-associated OSCC. The localization of β-catenin expression is correlated with the tumor size and clinical stage. In addition, β-catenin expression induced by arecoline is downregulated by PD98059, NAC, herbimycin-A, SB203580, and LY294002. Copyright © 2012. Published by Elsevier B.V.
URI:	https://ir.csmu.edu.tw:8080/ir/handle/310902500/10570
關聯:	J Formos Med Assoc. 2012 Apr;111(4):194-200.
显示于类别:	[牙醫學系暨碩士班] 期刊論文

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