201. NF45 overexpression is associated with poor prognosis and enhanced cell proliferation of pancreatic ductal adenocarcinoma.
- Author
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Wan C, Gong C, Ji L, Liu X, Wang Y, Wang L, Shao M, Yang L, Fan S, Xiao Y, Wang X, Li M, Zhou G, and Zhang Y
- Subjects
- Adult, Aged, Aged, 80 and over, Carcinoma, Pancreatic Ductal genetics, Carcinoma, Pancreatic Ductal pathology, Cell Cycle, Cell Line, Tumor, Cyclin E metabolism, Female, Gene Expression Regulation, Neoplastic, Humans, Kaplan-Meier Estimate, Male, Middle Aged, Nuclear Factor 45 Protein genetics, Pancreatic Neoplasms genetics, Pancreatic Neoplasms pathology, Prognosis, Proliferating Cell Nuclear Antigen metabolism, RNA Interference, Signal Transduction, Time Factors, Transfection, Up-Regulation, Carcinoma, Pancreatic Ductal metabolism, Cell Proliferation, Nuclear Factor 45 Protein metabolism, Pancreatic Neoplasms metabolism
- Abstract
NF45, also referred to as nuclear factor of activated T cells, has been reported to promote the progression of multiple cancer types. However, the expression and physiological significance of NF45 in pancreatic ductal adenocarcinoma (PDAC) remain largely elusive. In this study, we investigated the clinical relevance and potential role of NF45 expression in PDAC development. Western blot analysis revealed that NF45 was remarkably upregulated in PDAC tissues, compared with the adjacent non-tumorous ones. In addition, the expression of NF45 in 122 patients with PDAC was evaluated using immunohistochemistry. In this way, we found that NF45 was abundantly expressed in PDAC tissues, and the expression of NF45 was correlated with tumor size (p = 0.007), histological differentiation (p = 0.033), and TNM stage (p = 0.001). Importantly, patients with low levels of NF45 expression exhibited better postoperative prognosis as compared with those with high NF45 expression. Furthermore, using PDAC cell cultures, we found that interference of NF45 expression using siRNA oligos suppressed PDAC cell proliferation and retarded cell cycle progression. Moreover, depletion of NF45 impaired the levels of cellular cyclin E and proliferating cell nuclear antigen (PCNA). Conversely, overexpression of NF45 facilitated the cell growth and accelerated cell cycle progression. Our results establish NF45 as an important indicator of PDAC prognosis with potential utility as a therapeutic target in this lethal disease.
- Published
- 2015
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