Inhibition of Histone Deacetylases Reverses Epithelial-Mesenchymal Transition in Triple-Negative Breast Cancer Cells through a Slug Mediated Mechanism

• Published in: Molecular biology (New York) Vol. 52; no. 3; pp. 406 - 413
• Main Authors: Rahimian, A., Barati, G., Mehrandish, R., Mellati, A. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.05.2018; Springer Nature B.V
• Subjects: Biochemistry; Biomedical and Life Sciences; Breast cancer; Cell migration; E-cadherin; Gene expression; Human Genetics; Immigration; Inhibition; Invasiveness; Inversion; Life Sciences; Mesenchyme; Metastases; Metastasis; Molecular Cell Biology; Trichostatin A; Tumor cells; Tumors; Vimentin; Wound healing; metastasis; breast cancer; histone deacetylases; epithelial-mesenchymal transition; cell invasion; Slug; E-cadherin
• ISSN: 0026-8933; 1608-3245
• DOI: 10.1134/S0026893318030111

High metastatic ability and poor clinical outcome are the most known clinical features of the triple- negative breast tumors. Given that the tumor cells undergoing epithelial-mesenchymal transition (EMT) often gain malignant and invasive features, we have investigated the possibility of EMT reversal in triple-negative breast cancer cells by targeting the epigenetic-modifying enzymatic complexes named histone deacetylases (HDACs) and examined the possible mechanism underlying the HDACs-based inversion in model MDA-MB-231 cells. Cells were treated with a maximal tolerable 200 nM concentrations of classical HDACs inhibitor Trichostatin A (TSA) for 48 h and afterwards the invasiveness and immigration of the cells were evaluated in TransWell Invasion Scratch Wound Healing assays. Then, in treated and control cells, quantitative real time-PCRreacions were performed for assessing the gene expression of EMT biomarkers E-cadherin, Vimentin and transcriptional factor Slug. After TSA treatment, the invasion and migration properties MDAMB- 231 cells significantly decreased, gene expression of E-cadherin was significantly up-regulated, while the levels of Slug and Vimentin encoding mRNAs were suppressed. We conclude that inhibition of HDACs in triple- negative breast cancer cells may lead to inversion of EMT and the decrease of invasiveness by down-regulating the gene expression of Slug . Since EMT is known as a pre-metastatic process, triple-negative breast tumors, the EMT reversal effects of HDACs inhibition may reduce tumor cell metastasis.