Additive Pharmacological Interaction between Cisplatin (CDDP) and Histone Deacetylase Inhibitors (HDIs) in MDA-MB-231 Triple Negative Breast Cancer (TNBC) Cells with Altered Notch1 Activity: An Isobolographic Analysis

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Wawruszak A, Luszczki JJ, Kalafut J, Okla K, Halasa M, Rivero-Muller A, Stepulak A
Publisher: MDPI
Publication year: 2019
Journal: International Journal of Molecular Sciences
Journal acronym: INT J MOL SCI
Volume number: 20
Issue number: 15
Number of pages: 17


The aim of this study was to investigate the influence of the Notch1 activity level on the pharmacological interaction between cisplatin (CDDP) and two histone deacetylase inhibitors (HDIs)-valproic acid (VPA) and vorinostat (SAHA) in the triple negative breast cancer (TNBC) cells. Stable breast cancer (BC) cell lines with increased and decreased activity of Notch1 were generated using a transfection method. The type of interaction between CDDP and the HDIs was determined by isobolographic analysis of cell proliferation in MDA-MB-231 cells with differential levels of Notch1 activity in vitro. The combination of CDDP/SAHA and CDDP/VPA in the MDA-MB-231 triple negative breast cancer (TNBC) cells with increased activity of Notch1, as well as CDDP/VPA in the MDA-MB-231 cells with decreased activity of Notch1, yielded an additive interaction, whereas additivity with a tendency towards antagonism was observed for the combination of CDDP/SAHA in MDA-MB-231 cells with the decreased activity of Notch1. Our studies demonstrated that SAHA and VPA might be considered as potential therapeutic agents in combination therapy with CDDP against TNBC with altered Notch1 activity.


cisplatin (CDDP), histone deacetylase inhibitors (HDIs), isobolographic analysis, Notch1 receptor, triple negative breast cancer (TNBC), valproic acid (VPA), vorinostat (SAHA)

Last updated on 2020-26-05 at 05:02