Upregulation of SYF2 in esophageal squamous cell carcinoma promotes tumor cell proliferation and predicts poor prognosis
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SYF2, also known as CCNDBP1-interactor or p29, is reported in pre-mRNA splicing and cell cycle progression. However, the role of SYF2 in esophageal squamous cell carcinoma (ESCC) development remains elusive. In the present study, Western blot and immunohistochemistry assays demonstrated that SYF2 was overexpressed in ESCC tumor tissues and cell lines. In addition, immunohistochemistry analysis revealed that SYF2 expression was positively correlated with tumor grade and predicted poor prognosis of ESCC. In vitro studies using serum starvation-refeeding experiment and SYF2-siRNA transfection assay demonstrated that SYF2 expression promoted proliferation of ESCC cells, while SYF2 knockdown led to decreased cell growth rate and colony formation resulted from growth arrest of cell cycle at G0/G1 phase. Furthermore, our results indicated that SYF2 can down-regulate the sensitivity of ESCC cells for cisplatin. Our findings for the first time supported that SYF2 might play an important role in the regulation of ESCC proliferation and would provide a novel therapeutic strategy against human ESCC.
KeywordsEsophageal squamous cell carcinoma (ESCC) SYF2 Proliferation Prognosis
This work was supported by the Natural Science Foundation of China (No. 81272708).
Conflicts of interest
- 1.Buchanan G, Ricciardelli C, Harris JM, Prescott J, Yu ZC, Jia L, et al. Control of androgen receptor signaling in prostate cancer by the cochaperone small glutamine rich tetratricopeptide repeat containing protein alpha. Cancer Res. 2007;67(20):10087–96. doi: 10.1158/0008-5472.CAN-07-1646.CrossRefPubMedGoogle Scholar
- 9.Shinozaki H, Ozawa S, Ando N, Tsuruta H, Terada M, Ueda M, et al. Cyclin D1 amplification as a new predictive classification for squamous cell carcinoma of the esophagus, adding gene information. Clin Cancer Res Off J Am Assoc Cancer Res. 1996;2(7):1155–61.Google Scholar
- 19.Xue Q, Lv L, Wan C, Chen B, Li M, Ni T, et al. Expression and clinical role of small glutamine-rich tetratricopeptide repeat (TPR)-containing protein alpha (SGTA) as a novel cell cycle protein in NSCLC. J Cancer Res Clin Oncol. 2013;139(9):1539–49. doi: 10.1007/s00432-013-1474-5.CrossRefPubMedGoogle Scholar
- 24.Masuda M, Suzui M, Weinstein IB. Effects of epigallocatechin-3-gallate on growth, epidermal growth factor receptor signaling pathways, gene expression, and chemosensitivity in human head and neck squamous cell carcinoma cell lines. Clin Cancer Res Off J Am Assoc Cancer Res. 2001;7(12):4220–9.Google Scholar