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Opačak, Saša; Kovač, Margareta Pernar; Landais, Corentin; Debeljak, Željko; Golding, Taryn M.; Smith, Gregory S.; Brozovic, Anamaria; Kirin, Srećko I.
Journal of inorganic biochemistry, 08/2024, Letnik: 257Journal Article
Ruthenium complexes containing triphenylphosphine diamide ligands were prepared, characterized, and tested for their biological activity against various cancer cell lines and the malaria parasite, Plasmodium falciparum. The effect of M (mono-substituted) and B (bis-substituted) complexes on the human cervical carcinoma (HeLa) cell line was investigated using the MTT assay. Five (B2, B3, B5, B6, and B13) of the 24 synthesized ruthenium complexes showed significant effects with IC50 values ranging between 0.3 and 2.3 μM. Evaluation of the potential biomolecular targets of B2 and B13 by fluorescence spectroscopy revealed relevant interactions with BSA and only a weak affinity for ctDNA. Complexes M2, B2, M13 and B13 were selected for further biological characterization. Their effect on the viability of two ovarian cancer cell lines was compared to normal cell lines, denoting their selectivity. Upon treatment of four different drug-resistant gynaecological cancer cell lines, differing in their multidrug-resistant phenotypes, the efficacy of the bis-substituted complexes was shown to be greater than their mono-substituted counterparts. The non-MDR cells are sensitive to all the tested complexes, compared to MDR cells which are less sensitive. Upon investigation of complexes M2, M13, B2, and B13 against sensitive and multidrug-resistant parasite strains of P. falciparum, the bis-substituted complexes were again shown to be the most potent, with submicromolar activity against both strains. Furthermore, the resistance indexes for the complexes were approximately equal to 1, which is at least 5-fold lower than chloroquine diphosphate, suggesting the ability of these complexes to retain their activity in resistant forms of the parasite. Mono- and bis-substituted ruthenium complexes containing triphenylphosphine ligands were prepared, characterized, and tested for their biological activity against various cancer cell lines and the malaria parasite, Plasmodium falciparum. The complexes were also tested on multidrug-resistant cancer cell lines and multidrug-resistant plasmodium K1 strain and have shown relevant activities in both. Display omitted •Ruthenium phosphine complexes show anti-cancer and anti-malarial activity in vitro.•Bis-substituted derivatives are more toxic then mono-derivatives.•The compounds exhibit a relevant degree of selectivity toward healthy cell lines.•Fluorescence spectroscopy reveals proteins as the likely target.•MDR cancer cells are more sensitive to investigated complexes then non-MDR cells.
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in: SICRIS
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