Evaluation of Cytotoxic Activity of Titanocene Difluorides and Determination of Their Mechanism of Action in Ovarian Cancer Cells

0448145 - ÚCHP 2016 RIV NL eng J - Journal Article
Koubková, L. - Vyzula, R. - Karban, Jindřich - Pinkas, Jiří - Ondroušková, E. - Vojtěšek, B. - Hrstka, R.
Evaluation of Cytotoxic Activity of Titanocene Difluorides and Determination of Their Mechanism of Action in Ovarian Cancer Cells.
Investigational New Drugs. Roč. 33, č. 5 (2015), s. 1123-1132. ISSN 0167-6997. E-ISSN 1573-0646
R&D Projects: GA ČR(CZ) GAP207/12/2368
Institutional support: RVO:67985858 ; RVO:61388955
Keywords : cisplatin * cytotoxicity * organometallic compounds
Subject RIV: CA - Inorganic Chemistry
Impact factor: 3.281, year: 2015

Background Ovarian cancer is the seventh-most common cancer amongst women and the most deadly gynecologic cancer. Cisplatin based drugs are used in first line therapy, but resistance represents a major obstacle for successful treatment. In this study, we investigated the anticancer effects and mechanism of action of three titanocene difluorides, two bearing a pendant carbohydrate moiety (alpha-D-ribofuranos-5-yl) on their periphery and one without any substitution. Results The efficacy of these compounds on ovarian cancer cell lines was evaluated in relation to their particular chemical structure and compared with cisplatin as the most common treatment modality for this type of cancer. The typical mechanism of cisplatin action involves DNA damage, activation of p53 protein and induction of cell death, as previously described for titanium ions. Nevertheless, our data indicate that the effect of titanocene difluoride derivatives is mediated via the endoplasmic reticulum stress pathway and autophagy. Conclusion We anticipate that the presence of substituents on cyclopentadienyl ring(s) might play an important role in modulation of the activity of particular compounds. Titanocene difluorides exert comparable cytotoxic activity as cisplatin and are more efficient in cisplatin-resistant cell lines. Our results suggest potential utilization of these compounds especially in the treatment of cisplatin-resistant tumor cells.
Permanent Link: http://hdl.handle.net/11104/0249941