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.
| Original language | English |
|---|---|
| Pages (from-to) | 194-200 |
| Number of pages | 7 |
| Journal | Journal of the Formosan Medical Association |
| Volume | 111 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 2012 |
| Externally published | Yes |
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Keywords
- β-catenin
- Areca quid
- Arecoline
- Oral squamous cell carcinoma
- Regulatory mechanisms
ASJC Scopus subject areas
- Medicine(all)
Cite this
β-catenin expression in areca quid chewing-associated oral squamous cell carcinomas and upregulated by arecoline in human oral epithelial cells. / Lee, Shiuan Shinn; Tsai, Chung Hung; Tsai, Lo Lin; Chou, Ming Chih; Chou, Ming Yung; Chang, Yu Chao.
In: Journal of the Formosan Medical Association, Vol. 111, No. 4, 04.2012, p. 194-200.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - β-catenin expression in areca quid chewing-associated oral squamous cell carcinomas and upregulated by arecoline in human oral epithelial cells
AU - Lee, Shiuan Shinn
AU - Tsai, Chung Hung
AU - Tsai, Lo Lin
AU - Chou, Ming Chih
AU - Chou, Ming Yung
AU - Chang, Yu Chao
PY - 2012/4
Y1 - 2012/4
N2 - 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.
AB - 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.
KW - β-catenin
KW - Areca quid
KW - Arecoline
KW - Oral squamous cell carcinoma
KW - Regulatory mechanisms
UR - http://www.scopus.com/inward/record.url?scp=84862827707&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862827707&partnerID=8YFLogxK
U2 - 10.1016/j.jfma.2010.11.002
DO - 10.1016/j.jfma.2010.11.002
M3 - Article
VL - 111
SP - 194
EP - 200
JO - Journal of the Formosan Medical Association
JF - Journal of the Formosan Medical Association
SN - 0929-6646
IS - 4
ER -