Abstract
Triple-negative breast cancer (TNBC) is a special subtype of breast cancer, which is characterized by the negative form of estrogen receptor (ER), progesterone receptor (PR) and human epithelial growth factor receptor 2 (HER2). TNBC accounts for ~15% of all breast cancer forms, and often leads to high mortality and poor prognosis. Structural maintenance of chromosome 1 (SMC1) is a subunit of the cohesion protein complex. Brachyury is a protein that is encoded by the T gene in humans, which is a transcription factor within the T-box complex of genes. Epithelial-mesenchymal transition (EMT) is a ubiquitous process in the body, and in particular, induces metastasis and the proliferation of cancer cells. In the present study, we found that SMC1 expression in TNBC tissues exceeded its expression in adjacent non-tumor tissues. Similarly, the expression of SMC1 in TNBC cell lines (hs578T and HCC1937) was found to be higher than in MCF10a and MCF7 cells. Subsequently, SMC1 was overexpressed and silenced in hs578T and HCC1937 cells through plasmid and siRNA transfection, respectively. The results showed that the high expression of SMC1 often promoted EMT, accompanied by the enhanced expression of Brachyury. Besides, upregulated expressi...Continue Reading
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