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  4. Upregulation of Focal Adhesion Kinase by 14-3-3 epsilon via NF kappa B Activation in Hepatocellular Carcinoma
 
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Upregulation of Focal Adhesion Kinase by 14-3-3 epsilon via NF kappa B Activation in Hepatocellular Carcinoma

Resource
Anti-Cancer Agents Med. Chem., 13(4), 555-562
Journal
Anti-Cancer Agents Med. Chem.
Journal Volume
13
Journal Issue
4
Pages
555-562
Date Issued
2013
Date
2013
Author(s)
Ko, Bor-Sheng
Jan, Yee-Jee
Chang, Tzu-Ching
Liang, Shu-Man
Chen, Shyh-Chang
Liu, Tzu-An
Wu, Yao-Ming
Wang, John
Liou, Jun-Yang
URI
http://ntur.lib.ntu.edu.tw//handle/246246/259291
Abstract
Focal adhesion kinase (FAK) is implicated in cancer cell survival, proliferation and migration. Expression of FAK expression is elevated and associated with tumor progression and metastasis in various tumors, including hepatocellular carcinoma (HCC). Increased 14-3-3 epsilon expression is shown to be a potential prognostic factor to predict higher risk of distant metastasis and worse overall survival in HCC. The aim of this study is to investigate whether FAK is associated or regulated by 14-3-3 epsilon to modulate tumor progression in HCC. In this study, 114 primary HCC tumors including 34 matched metastatic tumors were subjected to immunohistochemistry analysis of FAK and 14-3-3 epsilon expression. Overexpression of FAK was significantly associated with increased risk of extrahepatic metastasis (p=0.027) and reduced 5-year overall survival rate (p=0.017). A significant correlation of FAK and 14-3-3 epsilon expression was observed in primary tumor (p<0.001) and also metastatic tumors. Furthermore, overexpression of 14-3-3 epsilon induced FAK expression and promoter activity which were determined by Western blotting analysis and luciferase-reporter assay. Moreover, 14-3-3 epsilon enhanced NF kappa B activation and increased nuclear translocation of NF kappa B. Results from chromatin immunoprecipitation assay revealed that 14-3-3 epsilon induced NF kappa B binding on FAK promoter region. These findings suggest that FAK expression is correlated with and upregulated by 14-3-3 epsilon via activation of NF kappa B. Target to suppress or inactivate FAK alone, or combine with 14-3-3 epsilon is thus considered as the potential therapeutic strategy for preventing HCC tumor progression.
Subjects
14-3-3 epsilon
Focal adhesion kinase
Hepatocellular carcinoma
Metastasis
NF kappa B
Survival
SDGs

[SDGs]SDG3

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