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Vol 52(2018) N 3 p. 406-413; DOI 10.1134/S0026893318030111 Full Text

A. Rahimian1, G. Barati2, R. Mehrandish1, A.A. Mellati1*

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

1Department of Biochemistry, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
2Department of Medical Biotechnology and Nanotechnology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran


*Mellati3000@yahoo.com
Received - 2017-01-25; Accepted - 2017-03-16

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-PCR reacions 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 MDA-MB-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.

breast cancer, metastasis, E-cadherin, cell invasion, Slug, epithelial-mesenchymal transition, histone deacetylases



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