Résumé
【Objective】 To explore the effect of negative elongation factor E(NELFE) on the invasion and migration of triple-negative breast cancer(TNBC) cells and its mechanisms. 【Methods】 qRT-PCR was used to detect the expression of negative elongation factor E(NELFE) in triple-negative breast cancer(TNBC) tissues and adjacent tissues. NELFE expression was upregulated in MDA-MB-231 cell lines via lentivirus transfection. Transwell assay was used to observe the effect of elevated NELFE expression on the migration and invasion of MDA-MB-231 cells. The RNA stability assay was used to detect the influence of NELFE on the stability of the mRNA of N-myc downstream regulated gene2(NDRG2). Western blotting analysis was used to detect the regulatory function of NELFE on NDRG2 protein expression. 【Results】 NELFE expression was increased in TNBC tissues. After the overexpression of NELFE, the migration and invasion of MDA-MB-231 cells were significantly enhanced, NDRG2 mRNA stability was decreased, and NDRG2 protein expression level was downregulated. NDRG2 expression was upregulated in MDA-MB-231 cell lines with overexpressed NELFE; cell migration and invasion abilities were decreased. 【Conclusion】 NELFE inhibited NDRG2 expression by decreasing the stability of NDRG2 mRNA and promoted the migration and invasion of TNBC cells.