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- W2073663754 abstract "Esophageal squamous cell carcinoma (ESCC) is one of the most lethal malignant cancers worldwide, with a poor 5-year prognosis. Karyopherin α 2 (KPNA2) is a nuclear membrane protein that mediates nucleus-to-cytoplasm shuttling. Its expression is elevated in multiple forms of cancer, and it can be secreted into the serum. However, the concentration of KPNA2 in serum from ESCC patients and the role of KPNA2 in ESCC cells remains unclear. The aim of the present study was to determine the concentration of KPNA2 in serum from ESCC patients and to investigate the effect of KPNA2 silencing on ESCC cell proliferation. KPNA2 protein expression was detected at the tissue level by immunohistochemistry, in cell lines by western blotting and at the serum level by enzyme linked immunosorbent assay (ELISA). Cell proliferation was determined by cell growth curve and colony formation assay. Stages of the cell cycle were analyzed by flow cytometry. The effect of KPNA2 knockdown on E2F1 translocation was determined by subcellular fractionation. KPNA2 was overexpressed in both ESCC tissues and cell lines compared with controls. The concentration of KPNA2 in serum from ESCC patients was significantly higher than that from healthy controls. The AUC was determined to be 0.804. The sensitivity and specificity of the assay were 76.7 and 75.0%, respectively. To determine the significance of KPNA2 function, small interfering RNA (siRNA) against KPNA2 was used to knock down KPNA2 levels in the ESCC using siRNA in the Kyse510 cell line. KPNA2 siRNA inhibited Kyse510 cell proliferation and colony formation ability and induced a G2/M phase arrest. The nuclear translocation of E2F1 was also reduced in siRNA-treated Kyse510 cells. The KPNA2 protein levels were high in ESCC tumors, and siRNA against KPNA2 could inhibit the growth of ESCC cells, suggesting it may be a new potent marker and therapeutic target for ESCC." @default.
- W2073663754 created "2016-06-24" @default.
- W2073663754 creator A5003063164 @default.
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- W2073663754 date "2014-08-04" @default.
- W2073663754 modified "2023-09-30" @default.
- W2073663754 title "KPNA2 is a promising biomarker candidate for esophageal squamous cell carcinoma and correlates with cell proliferation" @default.
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- W2073663754 doi "https://doi.org/10.3892/or.2014.3381" @default.
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