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Overexpression of tumor necrosis factor receptor‑associated factor 4 (TRAF4) has been reported in several human malignancies; however its association with Girdin in breast cancer is unclear. The aim of the present study was to analyze the correlation, expression and nuclear and cytoplasmic localizations of TRAF4 and Girdin in breast cancer tissues. Tissue samples from 38 patients with breast cancer, the MCF‑10A normal mammary epithelial cell line, the MCF‑7 estrogen‑receptor (ER)‑positive and MDA‑MB‑231 ER‑negative breast cancer cell lines were used in the present study. The results demonstrated that cytoplasmic expression of TRAF4 was positively correlated with cytoplasmic expression of Girdin. Furthermore, coexpression of TRAF4 and Girdin was highest in tissue samples from patients with lymph node metastases. Girdin was observed to be predominantly expressed in the cytoplasm of breast cancer cells; however TRAF4 promoted its translocation to the nucleus. These findings suggest that cytoplasmic expression of TRAF4 may be a novel potential marker for cell migration in breast cancer.

molecular medicine reports

Expression of tumor necrosis factor receptor-assicated factor 4 correlates with expression of Girdin and promotes nuclear translocation of Girdin in breast cancer