7687-22-1Relevant academic research and scientific papers
Cytotoxicity of η6-areneruthenium-based molecules to glioblastoma cells and their recognition by multidrug ABC transporters
Pazinato, Jaqueline,Cruz, Otávio M.,Naidek, Karine P.,Pires, Amanda R.A.,Westphal, Eduard,Gallardo, Hugo,Baubichon-Cortay, Hélène,Rocha, Maria E.M.,Martinez, Glaucia R.,Winnischofer, Sheila M.B.,Di Pietro, Attilio,Winnischofer, Herbert
, p. 165 - 177 (2018/02/20)
A new series of amphiphilic η6-areneruthenium(II) compounds containing phenylazo ligands (group I: compounds 1a, 1b, 2a and 2b) and phenyloxadiazole ligands (group II: compounds 3a, 3b, 4a and 4b) were synthesized and characterized for their anti-glioblastoma activity. The effects of the amphiphilic η6-areneruthenium(II) complexes on the viability of three human glioblastoma cell lines, U251, U87MG and T98G, were evaluated. The azo-derivative ruthenium complexes (group I) showed high cytotoxicity to all cell lines, whilst most oxadiazole-derivative complexes (group II) were less cytotoxic, except for compound 4a. The cationic complexes 2a, 2b and 4b were more cytotoxic than the neutral complexes. Compounds 2a and 2b caused a significant reduction in the percentage of cells in the G0/G1 phase, with concomitant increases in the G2/M phase and fragmented DNA in the T98G cell line. The η6-areneruthenium(II) compounds were also tested in cell lines that overexpress the multidrug ABC transporters P-gp, MRP1 and ABCG2. Compounds 2b and 4a were substrates for the P-gp protein, with resistance indexes of 8.6 and 1.9, respectively. Compound 2b was also a substrate for ABCG2 and MRP1 proteins, with lower resistance indexes (1.8 and 1.6, respectively). The contribution of multidrug ABC transporters to the cytotoxicity of compound 2b in T98G cells was evidenced, since verapamil (a characteristic inhibitor of MRP1) increased the cytotoxicity of compound 2b at concentrations up to 20 μmol L?1, whilst GF120918 and Ko143 (specific inhibitors of P-gp and ABCG2, respectively) had no significant effect. In addition, we showed that compound 2b interacts with glutathione (GSH), which could explain its cellular efflux by MRP1. Our results showed that the amphiphilic η6-areneruthenium(II) complexes are promising anti-glioblastoma compounds, especially compound 2b, which was cytotoxic for all three cell lines, although it is transported by the three main multidrug ABC transporters.
Photo-driven optical oscillators in the kHz range based on push-pull hydroxyazopyridines
Garcia-Amoros, Jaume,Nonell, Santi,Velasco, Dolores
body text, p. 4022 - 4024 (2011/06/25)
Push-pull azophenols are valuable target molecules for stable photo-driven optical oscillators. Hydroxyazopyridinium methyl iodide salts show oscillation frequencies up to 10 kHz with no signs of fatigue upon continuous work. The Royal Society of Chemistry.
RUTHENIUM (II) COMPOUNDS
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Page/Page column 30-31, (2010/11/28)
A ruthenium (II) compound of formula (I) wherein X is halo or a neutral or negatively charged O, N- or S- donor ligand; Y is a counterion; m is 0 or 1; q is 1, 2 or 3; A is either: (i) (Ru)-NRN1RN2-RN3-(N)
