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NF45 overexpression is associated with poor prognosis and enhanced cell proliferation of pancreatic ductal adenocarcinoma

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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.

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Acknowledgments

We thank Dr. Martin Holcik of University of Ottawa for kindly offering us the pcDNA3-Flag-NF45 construct. This work was supported by the National Natural Scientific Foundation of China (No. 81072028) and Jiangsu Province’s Outstanding Medical Academic Leader program (No. LJ101135).

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    Authors and Affiliations

    1. Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, 226001, Jiangsu, China

      Chunhua Wan

    2. Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, China

      Chunhua Wan, Xiaorong Liu, Yayun Wang, Liang Wang, Mengting Shao & Linlin Yang

    3. Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, China

      Chen Gong, Li Ji, Shaoqing Fan, Yin Xiao, Xiaotong Wang, Manhua Li & Guoxiong Zhou

    4. Department of General Surgery, Nantong University Cancer Hospital, Nantong, 226001, Jiangsu, China

      Yixin Zhang

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    Chunhua Wan and Chen Gong have contributed equally to this work.

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    Wan, C., Gong, C., Ji, L. et al. NF45 overexpression is associated with poor prognosis and enhanced cell proliferation of pancreatic ductal adenocarcinoma. Mol Cell Biochem 410, 25–35 (2015). https://doi.org/10.1007/s11010-015-2535-7

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