Ukr.Biochem.J. 2020; Volume 92, Issue 4, Jul-Aug, pp. 24-34


Adaptor protein Ruk/CIN85 affects redox balance in breast cancer cells

I. R. Horak*, N. V. Latyshko, O. O. Hudkova, T. O. Kishko,
O. V. Khudiakova, D. S. Gerashchenko, T. D. Skaterna,
I. P. Krysiuk, S. G. Shandrenko, L. B. Drobot

Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kyiv;

Received: 25 February 2020; Accepted: 15 May 2020

Excessive reactive oxygen species (ROS) production may lead to damage of cellular proteins, lipids and DNA, and cause cell death. Our previous findings demonstrated that increased level of adaptor protein Ruk/CIN85 contributes to breast cancer cells malignancy. The aim of this study was to investigate the role of Ruk/CIN85 in the maintaining of the redox balance in cancer cells. Mouse breast adenocarcinoma 4T1 cells with different levels of Ruk/CIN85 expression were used as a model in this study. Activities of catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD), aldehyde dehydrogenase (ALDH) and formaldehyde dehydrogenase (FALDH), as well as H2O2 and aldehydes content were measured using fluorometric assays. Gene expression correlations between Ruk/CIN85 and antioxidant enzymes in breast cancer samples were analyzed using ist.medisapiens transcriptomic database. It was demonstrated that Ruk/CIN85-overexpressing 4T1 cells were characterized by increased production of H2O2 and reduced activities of CAT, GPx and SOD. Overexpression of Ruk/CIN85 resulted in decreased content of aldehydes together with increased activity of ALDH, while in Ruk/CIN85-knocked down 4T1 cells, activities of ALDH and FALDH were decreased. The data of transcriptomic analysis revealed the correlations between SH3KBP1 expression and CAT, GPX4, ALDH1A1, ALDH1L1, ALDH2, GSR, SOD1 in human breast carcinomas samples. The obtained results indicate that adaptor protein Ruk/CIN85 affects redox balance in mouse breast adenocarcinoma 4T1 cells.

Keywords: , , , ,


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