TY  - JOUR
AU  - Mihajlović-Lalić, Ljiljana E.
AU  - Stanković, Dalibor M.
AU  - Novaković, Irena T.
AU  - Grgurić-Šipka, Sanja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10344
AB  - Three ruthenium-bipyridine complexes (1–3) carrying acetylpyridine ligand unit were synthesized in methanol via the reaction of [RuCl2(bpy)2] with corresponding acetylpyridine (2-, 3-, and 4-acpy). Obtained complexes were characterized by (1H and 13C) NMR and IR spectroscopy, MS spectrometry, UV‒vis spectrophotometry, and cyclic voltammetry. Their structural characterization revealed bidentate coordination mode for 2-acpy while 3- and 4-acpy acted as monodentate ligands. The electrochemical profile of newly synthesized compounds was investigated by cyclic voltammetry which confirmed their electrochemical activity. Voltammetric responses within the −1.20 < Ep < 1.50 V range of potentials were summarized in two major events: Ru(II)→Ru(III) oxidation spotted at app. ΔEp = 0.65 V and successive reductions of bpy units located from ‒0.79 V to 0.47 V (vs. Ag/AgCl (3 M) electrode). The DNA-binding activity of the complexes was evaluated by both UV‒vis spectrophotometry and cyclic voltammetry indicating DNA-intercalation with a slight contribution of electrostatic interactions. Furthermore, antimicrobial activity was tested against bacterial and fungal strains, for which moderate activity was observed. Assessment of in vitro toxicity against freshly hatched nauplii of Artemia salina as well as radical scavenging capacity was evaluated. The test compounds showed neither toxicity nor antioxidant activity.
T2  - Journal of Coordination Chemistry
T1  - (Electro)chemical and antimicrobial characterization of novel Ru(II) bipyridine complexes with acetylpyridine analogs
SP  - 1
EP  - 15
DO  - 10.1080/00958972.2022.2090247
ER  - 

@article{
author = "Mihajlović-Lalić, Ljiljana E. and Stanković, Dalibor M. and Novaković, Irena T. and Grgurić-Šipka, Sanja",
year = "2022",
abstract = "Three ruthenium-bipyridine complexes (1–3) carrying acetylpyridine ligand unit were synthesized in methanol via the reaction of [RuCl2(bpy)2] with corresponding acetylpyridine (2-, 3-, and 4-acpy). Obtained complexes were characterized by (1H and 13C) NMR and IR spectroscopy, MS spectrometry, UV‒vis spectrophotometry, and cyclic voltammetry. Their structural characterization revealed bidentate coordination mode for 2-acpy while 3- and 4-acpy acted as monodentate ligands. The electrochemical profile of newly synthesized compounds was investigated by cyclic voltammetry which confirmed their electrochemical activity. Voltammetric responses within the −1.20 < Ep < 1.50 V range of potentials were summarized in two major events: Ru(II)→Ru(III) oxidation spotted at app. ΔEp = 0.65 V and successive reductions of bpy units located from ‒0.79 V to 0.47 V (vs. Ag/AgCl (3 M) electrode). The DNA-binding activity of the complexes was evaluated by both UV‒vis spectrophotometry and cyclic voltammetry indicating DNA-intercalation with a slight contribution of electrostatic interactions. Furthermore, antimicrobial activity was tested against bacterial and fungal strains, for which moderate activity was observed. Assessment of in vitro toxicity against freshly hatched nauplii of Artemia salina as well as radical scavenging capacity was evaluated. The test compounds showed neither toxicity nor antioxidant activity.",
journal = "Journal of Coordination Chemistry",
title = "(Electro)chemical and antimicrobial characterization of novel Ru(II) bipyridine complexes with acetylpyridine analogs",
pages = "1-15",
doi = "10.1080/00958972.2022.2090247"
}

Mihajlović-Lalić, L. E., Stanković, D. M., Novaković, I. T.,& Grgurić-Šipka, S.. (2022). (Electro)chemical and antimicrobial characterization of novel Ru(II) bipyridine complexes with acetylpyridine analogs. in Journal of Coordination Chemistry, 1-15.
https://doi.org/10.1080/00958972.2022.2090247

Mihajlović-Lalić LE, Stanković DM, Novaković IT, Grgurić-Šipka S. (Electro)chemical and antimicrobial characterization of novel Ru(II) bipyridine complexes with acetylpyridine analogs. in Journal of Coordination Chemistry. 2022;:1-15.
doi:10.1080/00958972.2022.2090247 .

Mihajlović-Lalić, Ljiljana E., Stanković, Dalibor M., Novaković, Irena T., Grgurić-Šipka, Sanja, "(Electro)chemical and antimicrobial characterization of novel Ru(II) bipyridine complexes with acetylpyridine analogs" in Journal of Coordination Chemistry (2022):1-15,
https://doi.org/10.1080/00958972.2022.2090247 . .

TY  - JOUR
AU  - Korać Jačić, Jelena
AU  - Nikolić, Ljiljana
AU  - Stanković, Dalibor M.
AU  - Opačić, Miloš
AU  - Dimitrijević, Milena S.
AU  - Savić, Danijela
AU  - Grgurić-Šipka, Sanja
AU  - Spasojević, Ivan
AU  - Bogdanović-Pristov, Jelena
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8801
AB  - Upon release in response to stress, epinephrine (Epi) may interact with labile iron pool in human plasma with potentially important (patho)physiological consequences. We have shown that Epi and Fe3+ build stable 1:1 high-spin bidentate complex at physiological pH, and that Epi does not undergo degradation in the presence of iron. However, the interactions of Epi with the more soluble Fe2+, and the impact of iron on biological activity of Epi are still not known. Herein we showed that Epi and Fe2+ build colorless complex which is stable under anaerobic conditions. In the presence of O2, Epi promoted the oxidation of Fe2+ and the formation of Epi-Fe3+ complex. Cyclic voltammetry showed that mid-point potential of Epi-Fe2+ complex is very low (-582 mV vs. standard hydrogen electrode), which explains catalyzed oxidation of Fe2+. Next, we examined the impact of iron binding on biological performance of Epi using patch clamping in cell culture with constitutive expression of adrenergic receptors. Epi alone evoked an increase of outward currents, whereas Epi in the complex with Fe3+ did not. This implies that the binding of Epi to adrenergic receptors and their activation is prevented by the formation of complex with iron. Pro-oxidative activity of Epi-Fe2+ complex may represent a link between chronic stress and cardiovascular problems. On the other hand, labile iron could serve as a modulator of biological activity of ligands. Such interactions may be important in human pathologies that are related to iron overload or deficiency.
T2  - Free Radical Biology and Medicine
T1  - Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors.
VL  - 148
SP  - 123
EP  - 127
DO  - 10.1016/j.freeradbiomed.2020.01.001
ER  - 

@article{
author = "Korać Jačić, Jelena and Nikolić, Ljiljana and Stanković, Dalibor M. and Opačić, Miloš and Dimitrijević, Milena S. and Savić, Danijela and Grgurić-Šipka, Sanja and Spasojević, Ivan and Bogdanović-Pristov, Jelena",
year = "2020",
abstract = "Upon release in response to stress, epinephrine (Epi) may interact with labile iron pool in human plasma with potentially important (patho)physiological consequences. We have shown that Epi and Fe3+ build stable 1:1 high-spin bidentate complex at physiological pH, and that Epi does not undergo degradation in the presence of iron. However, the interactions of Epi with the more soluble Fe2+, and the impact of iron on biological activity of Epi are still not known. Herein we showed that Epi and Fe2+ build colorless complex which is stable under anaerobic conditions. In the presence of O2, Epi promoted the oxidation of Fe2+ and the formation of Epi-Fe3+ complex. Cyclic voltammetry showed that mid-point potential of Epi-Fe2+ complex is very low (-582 mV vs. standard hydrogen electrode), which explains catalyzed oxidation of Fe2+. Next, we examined the impact of iron binding on biological performance of Epi using patch clamping in cell culture with constitutive expression of adrenergic receptors. Epi alone evoked an increase of outward currents, whereas Epi in the complex with Fe3+ did not. This implies that the binding of Epi to adrenergic receptors and their activation is prevented by the formation of complex with iron. Pro-oxidative activity of Epi-Fe2+ complex may represent a link between chronic stress and cardiovascular problems. On the other hand, labile iron could serve as a modulator of biological activity of ligands. Such interactions may be important in human pathologies that are related to iron overload or deficiency.",
journal = "Free Radical Biology and Medicine",
title = "Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors.",
volume = "148",
pages = "123-127",
doi = "10.1016/j.freeradbiomed.2020.01.001"
}

Korać Jačić, J., Nikolić, L., Stanković, D. M., Opačić, M., Dimitrijević, M. S., Savić, D., Grgurić-Šipka, S., Spasojević, I.,& Bogdanović-Pristov, J.. (2020). Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors.. in Free Radical Biology and Medicine, 148, 123-127.
https://doi.org/10.1016/j.freeradbiomed.2020.01.001

Korać Jačić J, Nikolić L, Stanković DM, Opačić M, Dimitrijević MS, Savić D, Grgurić-Šipka S, Spasojević I, Bogdanović-Pristov J. Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors.. in Free Radical Biology and Medicine. 2020;148:123-127.
doi:10.1016/j.freeradbiomed.2020.01.001 .

Korać Jačić, Jelena, Nikolić, Ljiljana, Stanković, Dalibor M., Opačić, Miloš, Dimitrijević, Milena S., Savić, Danijela, Grgurić-Šipka, Sanja, Spasojević, Ivan, Bogdanović-Pristov, Jelena, "Ferrous iron binding to epinephrine promotes the oxidation of iron and impedes activation of adrenergic receptors." in Free Radical Biology and Medicine, 148 (2020):123-127,
https://doi.org/10.1016/j.freeradbiomed.2020.01.001 . .

TY  - JOUR
AU  - Korać, Jelena
AU  - Stanković, Dalibor M.
AU  - Stanić, Marina
AU  - Bajuk-Bogdanović, Danica V.
AU  - Žižić, Milan
AU  - Bogdanović-Pristov, Jelena
AU  - Grgurić-Šipka, Sanja
AU  - Popović-Bijelić, Ana D.
AU  - Spasojević, Ivan
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7582
AB  - Coordinate and redox interactions of epinephrine (Epi) with iron at physiological pH are essential for understanding two very different phenomena - the detrimental effects of chronic stress on the cardiovascular system and the cross-linking of catecholamine-rich biopolymers and frameworks. Here we show that Epi and Fe3+ form stable high-spin complexes in the 1:1 or 3:1 stoichiometry, depending on the Epi/Fe3+ concentration ratio (low or high). Oxygen atoms on the catechol ring represent the sites of coordinate bond formation within physiologically relevant bidentate 1:1 complex. Redox properties of Epi are slightly impacted by Fe3+. On the other hand, Epi and Fe2+ form a complex that acts as a strong reducing agent, which leads to the production of hydrogen peroxide via O-2 reduction, and to a facilitated formation of the Epi-Fe3+ complexes. Epi is not oxidized in this process, i.e. Fe2+ is not an electron shuttle, but the electron donor. Epi-catalyzed oxidation of Fe2+ represents a plausible chemical basis of stress-related damage to heart cells. In addition, our results support the previous findings on the interactions of catecholamine moieties in polymers with iron and provide a novel strategy for improving the efficiency of cross-linking.
T2  - Scientific Reports
T1  - Coordinate and redox interactions of epinephrine with ferric and ferrous iron at physiological pH
VL  - 8
SP  - 3530
DO  - 10.1038/s41598-018-21940-7
ER  - 

@article{
author = "Korać, Jelena and Stanković, Dalibor M. and Stanić, Marina and Bajuk-Bogdanović, Danica V. and Žižić, Milan and Bogdanović-Pristov, Jelena and Grgurić-Šipka, Sanja and Popović-Bijelić, Ana D. and Spasojević, Ivan",
year = "2018",
abstract = "Coordinate and redox interactions of epinephrine (Epi) with iron at physiological pH are essential for understanding two very different phenomena - the detrimental effects of chronic stress on the cardiovascular system and the cross-linking of catecholamine-rich biopolymers and frameworks. Here we show that Epi and Fe3+ form stable high-spin complexes in the 1:1 or 3:1 stoichiometry, depending on the Epi/Fe3+ concentration ratio (low or high). Oxygen atoms on the catechol ring represent the sites of coordinate bond formation within physiologically relevant bidentate 1:1 complex. Redox properties of Epi are slightly impacted by Fe3+. On the other hand, Epi and Fe2+ form a complex that acts as a strong reducing agent, which leads to the production of hydrogen peroxide via O-2 reduction, and to a facilitated formation of the Epi-Fe3+ complexes. Epi is not oxidized in this process, i.e. Fe2+ is not an electron shuttle, but the electron donor. Epi-catalyzed oxidation of Fe2+ represents a plausible chemical basis of stress-related damage to heart cells. In addition, our results support the previous findings on the interactions of catecholamine moieties in polymers with iron and provide a novel strategy for improving the efficiency of cross-linking.",
journal = "Scientific Reports",
title = "Coordinate and redox interactions of epinephrine with ferric and ferrous iron at physiological pH",
volume = "8",
pages = "3530",
doi = "10.1038/s41598-018-21940-7"
}

Korać, J., Stanković, D. M., Stanić, M., Bajuk-Bogdanović, D. V., Žižić, M., Bogdanović-Pristov, J., Grgurić-Šipka, S., Popović-Bijelić, A. D.,& Spasojević, I.. (2018). Coordinate and redox interactions of epinephrine with ferric and ferrous iron at physiological pH. in Scientific Reports, 8, 3530.
https://doi.org/10.1038/s41598-018-21940-7

Korać J, Stanković DM, Stanić M, Bajuk-Bogdanović DV, Žižić M, Bogdanović-Pristov J, Grgurić-Šipka S, Popović-Bijelić AD, Spasojević I. Coordinate and redox interactions of epinephrine with ferric and ferrous iron at physiological pH. in Scientific Reports. 2018;8:3530.
doi:10.1038/s41598-018-21940-7 .

Korać, Jelena, Stanković, Dalibor M., Stanić, Marina, Bajuk-Bogdanović, Danica V., Žižić, Milan, Bogdanović-Pristov, Jelena, Grgurić-Šipka, Sanja, Popović-Bijelić, Ana D., Spasojević, Ivan, "Coordinate and redox interactions of epinephrine with ferric and ferrous iron at physiological pH" in Scientific Reports, 8 (2018):3530,
https://doi.org/10.1038/s41598-018-21940-7 . .

TY  - JOUR
AU  - Baroud, Afya A.
AU  - Mihajlović-Lalić, Ljiljana E.
AU  - Gligorijević, Nevenka N.
AU  - Aranđelović, Sandra
AU  - Stanković, Dalibor M.
AU  - Radulović, Siniša S.
AU  - Van Hecke, Kristof
AU  - Savić, Aleksandar
AU  - Grgurić-Šipka, Sanja
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1438
AB  - Complexes 1-4, [Ru(L)(bpy)(2)]PF6, where bpy=2,2-bipyridine; HL=3-methylpyridine-2-carboxylic acid (HL1), 6-methylpyridine-2-carboxylic acid (HL2), 5-bromopyridine-2-carboxylic acid (HL3) and 6-bromopyridine-2-carboxylic acid (HL4), were synthesized and characterized. The electrochemical character of the complexes was investigated by cyclic voltammetry revealing two reversible reduction waves in the negative range of potentials, most likely due to a reduction of the bipyridine moiety. Cytotoxicity studies by MTT assay for 72h of drug action revealed that 2-4 exhibited moderate activity in cervical human tumor cells (HeLa). Complex 2 exhibited low activity in colon cancer LS-174 cells (180 +/- 10), while all complexes were devoid of activity in lung cancer A549 and non-tumor MRC-5 cells, up to 200M. Combinational studies of the most active complex 2, with pharmacological modulators of cell redox status, L-buthionine-sulfoximine (L-BSO) or N-acetyl-L-cysteine (NAC), showed that when L-BSO potentiated, 2 induced a sub-G1 peak of the cell cycle in the HeLa cell line. UV-vis and cyclic voltammetry were performed in order to investigate the binding mode of 2 to DNA and suggested intercalation for the complex-DNA interaction. [GRAPHICS]
T2  - Journal of Coordination Chemistry
T1  - Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation
VL  - 70
IS  - 5
SP  - 831
EP  - 847
DO  - 10.1080/00958972.2017.1282611
ER  - 

@article{
author = "Baroud, Afya A. and Mihajlović-Lalić, Ljiljana E. and Gligorijević, Nevenka N. and Aranđelović, Sandra and Stanković, Dalibor M. and Radulović, Siniša S. and Van Hecke, Kristof and Savić, Aleksandar and Grgurić-Šipka, Sanja",
year = "2017",
abstract = "Complexes 1-4, [Ru(L)(bpy)(2)]PF6, where bpy=2,2-bipyridine; HL=3-methylpyridine-2-carboxylic acid (HL1), 6-methylpyridine-2-carboxylic acid (HL2), 5-bromopyridine-2-carboxylic acid (HL3) and 6-bromopyridine-2-carboxylic acid (HL4), were synthesized and characterized. The electrochemical character of the complexes was investigated by cyclic voltammetry revealing two reversible reduction waves in the negative range of potentials, most likely due to a reduction of the bipyridine moiety. Cytotoxicity studies by MTT assay for 72h of drug action revealed that 2-4 exhibited moderate activity in cervical human tumor cells (HeLa). Complex 2 exhibited low activity in colon cancer LS-174 cells (180 +/- 10), while all complexes were devoid of activity in lung cancer A549 and non-tumor MRC-5 cells, up to 200M. Combinational studies of the most active complex 2, with pharmacological modulators of cell redox status, L-buthionine-sulfoximine (L-BSO) or N-acetyl-L-cysteine (NAC), showed that when L-BSO potentiated, 2 induced a sub-G1 peak of the cell cycle in the HeLa cell line. UV-vis and cyclic voltammetry were performed in order to investigate the binding mode of 2 to DNA and suggested intercalation for the complex-DNA interaction. [GRAPHICS]",
journal = "Journal of Coordination Chemistry",
title = "Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation",
volume = "70",
number = "5",
pages = "831-847",
doi = "10.1080/00958972.2017.1282611"
}

Baroud, A. A., Mihajlović-Lalić, L. E., Gligorijević, N. N., Aranđelović, S., Stanković, D. M., Radulović, S. S., Van Hecke, K., Savić, A.,& Grgurić-Šipka, S.. (2017). Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation. in Journal of Coordination Chemistry, 70(5), 831-847.
https://doi.org/10.1080/00958972.2017.1282611

Baroud AA, Mihajlović-Lalić LE, Gligorijević NN, Aranđelović S, Stanković DM, Radulović SS, Van Hecke K, Savić A, Grgurić-Šipka S. Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation. in Journal of Coordination Chemistry. 2017;70(5):831-847.
doi:10.1080/00958972.2017.1282611 .

Baroud, Afya A., Mihajlović-Lalić, Ljiljana E., Gligorijević, Nevenka N., Aranđelović, Sandra, Stanković, Dalibor M., Radulović, Siniša S., Van Hecke, Kristof, Savić, Aleksandar, Grgurić-Šipka, Sanja, "Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation" in Journal of Coordination Chemistry, 70, no. 5 (2017):831-847,
https://doi.org/10.1080/00958972.2017.1282611 . .

TY  - JOUR
AU  - Baroud, Afya A.
AU  - Mihajlović-Lalić, Ljiljana E.
AU  - Stanković, Dalibor M.
AU  - Kajzerberger, Marijana
AU  - Van Hecke, Kristof
AU  - Grgurić-Šipka, Sanja
AU  - Savić, Aleksandar
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1569
AB  - A new Ru(II) bipyridyl complex with O-4-hydrogenpyridine-2,4-dicarboxylate was synthesized and characterized by IR, NMR and mass spectrometry, X-ray diffraction analysis and elemental analysis. The electrochemical characteristics of the complex were investigated by cyclic voltammetry, revealing Ru(II)/Ru(III) electron transfer in the positive range of potentials. On the opposite potential side, multiple partially reversible peaks were dominant, representing subsequent reductions of the bulky bipyridyl moiety. The cytotoxic activity of the complex was tested in two human cancer cell lines: A549 (lung cancer) and K562 (leukemia) as well as non-tumor MRC-5 cells, by MTT assays. The IC50 values were GT 300 and 177.63+/-2.28 mu M for the A549 and K562 cells, respectively.
T2  - Journal of the Serbian Chemical Society
T1  - New ruthenium(II) bipyridyl complex: Synthesis, crystal structure and cytotoxicity
VL  - 82
IS  - 3
SP  - 267
EP  - 275
DO  - 10.2298/JSC170109025B
ER  - 

@article{
author = "Baroud, Afya A. and Mihajlović-Lalić, Ljiljana E. and Stanković, Dalibor M. and Kajzerberger, Marijana and Van Hecke, Kristof and Grgurić-Šipka, Sanja and Savić, Aleksandar",
year = "2017",
abstract = "A new Ru(II) bipyridyl complex with O-4-hydrogenpyridine-2,4-dicarboxylate was synthesized and characterized by IR, NMR and mass spectrometry, X-ray diffraction analysis and elemental analysis. The electrochemical characteristics of the complex were investigated by cyclic voltammetry, revealing Ru(II)/Ru(III) electron transfer in the positive range of potentials. On the opposite potential side, multiple partially reversible peaks were dominant, representing subsequent reductions of the bulky bipyridyl moiety. The cytotoxic activity of the complex was tested in two human cancer cell lines: A549 (lung cancer) and K562 (leukemia) as well as non-tumor MRC-5 cells, by MTT assays. The IC50 values were GT 300 and 177.63+/-2.28 mu M for the A549 and K562 cells, respectively.",
journal = "Journal of the Serbian Chemical Society",
title = "New ruthenium(II) bipyridyl complex: Synthesis, crystal structure and cytotoxicity",
volume = "82",
number = "3",
pages = "267-275",
doi = "10.2298/JSC170109025B"
}

Baroud, A. A., Mihajlović-Lalić, L. E., Stanković, D. M., Kajzerberger, M., Van Hecke, K., Grgurić-Šipka, S.,& Savić, A.. (2017). New ruthenium(II) bipyridyl complex: Synthesis, crystal structure and cytotoxicity. in Journal of the Serbian Chemical Society, 82(3), 267-275.
https://doi.org/10.2298/JSC170109025B

Baroud AA, Mihajlović-Lalić LE, Stanković DM, Kajzerberger M, Van Hecke K, Grgurić-Šipka S, Savić A. New ruthenium(II) bipyridyl complex: Synthesis, crystal structure and cytotoxicity. in Journal of the Serbian Chemical Society. 2017;82(3):267-275.
doi:10.2298/JSC170109025B .

Baroud, Afya A., Mihajlović-Lalić, Ljiljana E., Stanković, Dalibor M., Kajzerberger, Marijana, Van Hecke, Kristof, Grgurić-Šipka, Sanja, Savić, Aleksandar, "New ruthenium(II) bipyridyl complex: Synthesis, crystal structure and cytotoxicity" in Journal of the Serbian Chemical Society, 82, no. 3 (2017):267-275,
https://doi.org/10.2298/JSC170109025B . .

TY  - JOUR
AU  - Baroud, Afya A.
AU  - Mihajlović-Lalić, Ljiljana E.
AU  - Gligorijević, Nevenka N.
AU  - Aranđelović, Sandra
AU  - Stanković, Dalibor M.
AU  - Radulović, Siniša S.
AU  - Van Hecke, Kristof
AU  - Savić, Aleksandar
AU  - Grgurić-Šipka, Sanja
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8852
AB  - Complexes 1-4, [Ru(L)(bpy)(2)]PF6, where bpy=2,2-bipyridine; HL=3-methylpyridine-2-carboxylic acid (HL1), 6-methylpyridine-2-carboxylic acid (HL2), 5-bromopyridine-2-carboxylic acid (HL3) and 6-bromopyridine-2-carboxylic acid (HL4), were synthesized and characterized. The electrochemical character of the complexes was investigated by cyclic voltammetry revealing two reversible reduction waves in the negative range of potentials, most likely due to a reduction of the bipyridine moiety. Cytotoxicity studies by MTT assay for 72h of drug action revealed that 2-4 exhibited moderate activity in cervical human tumor cells (HeLa). Complex 2 exhibited low activity in colon cancer LS-174 cells (180 +/- 10), while all complexes were devoid of activity in lung cancer A549 and non-tumor MRC-5 cells, up to 200M. Combinational studies of the most active complex 2, with pharmacological modulators of cell redox status, L-buthionine-sulfoximine (L-BSO) or N-acetyl-L-cysteine (NAC), showed that when L-BSO potentiated, 2 induced a sub-G1 peak of the cell cycle in the HeLa cell line. UV-vis and cyclic voltammetry were performed in order to investigate the binding mode of 2 to DNA and suggested intercalation for the complex-DNA interaction. [GRAPHICS]
T2  - Journal of Coordination Chemistry
T1  - Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation
VL  - 70
IS  - 5
SP  - 831
EP  - 847
DO  - 10.1080/00958972.2017.1282611
ER  - 

@article{
author = "Baroud, Afya A. and Mihajlović-Lalić, Ljiljana E. and Gligorijević, Nevenka N. and Aranđelović, Sandra and Stanković, Dalibor M. and Radulović, Siniša S. and Van Hecke, Kristof and Savić, Aleksandar and Grgurić-Šipka, Sanja",
year = "2017",
abstract = "Complexes 1-4, [Ru(L)(bpy)(2)]PF6, where bpy=2,2-bipyridine; HL=3-methylpyridine-2-carboxylic acid (HL1), 6-methylpyridine-2-carboxylic acid (HL2), 5-bromopyridine-2-carboxylic acid (HL3) and 6-bromopyridine-2-carboxylic acid (HL4), were synthesized and characterized. The electrochemical character of the complexes was investigated by cyclic voltammetry revealing two reversible reduction waves in the negative range of potentials, most likely due to a reduction of the bipyridine moiety. Cytotoxicity studies by MTT assay for 72h of drug action revealed that 2-4 exhibited moderate activity in cervical human tumor cells (HeLa). Complex 2 exhibited low activity in colon cancer LS-174 cells (180 +/- 10), while all complexes were devoid of activity in lung cancer A549 and non-tumor MRC-5 cells, up to 200M. Combinational studies of the most active complex 2, with pharmacological modulators of cell redox status, L-buthionine-sulfoximine (L-BSO) or N-acetyl-L-cysteine (NAC), showed that when L-BSO potentiated, 2 induced a sub-G1 peak of the cell cycle in the HeLa cell line. UV-vis and cyclic voltammetry were performed in order to investigate the binding mode of 2 to DNA and suggested intercalation for the complex-DNA interaction. [GRAPHICS]",
journal = "Journal of Coordination Chemistry",
title = "Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation",
volume = "70",
number = "5",
pages = "831-847",
doi = "10.1080/00958972.2017.1282611"
}

Baroud, A. A., Mihajlović-Lalić, L. E., Gligorijević, N. N., Aranđelović, S., Stanković, D. M., Radulović, S. S., Van Hecke, K., Savić, A.,& Grgurić-Šipka, S.. (2017). Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation. in Journal of Coordination Chemistry, 70(5), 831-847.
https://doi.org/10.1080/00958972.2017.1282611

Baroud AA, Mihajlović-Lalić LE, Gligorijević NN, Aranđelović S, Stanković DM, Radulović SS, Van Hecke K, Savić A, Grgurić-Šipka S. Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation. in Journal of Coordination Chemistry. 2017;70(5):831-847.
doi:10.1080/00958972.2017.1282611 .

Baroud, Afya A., Mihajlović-Lalić, Ljiljana E., Gligorijević, Nevenka N., Aranđelović, Sandra, Stanković, Dalibor M., Radulović, Siniša S., Van Hecke, Kristof, Savić, Aleksandar, Grgurić-Šipka, Sanja, "Ruthenium(II) bipyridine complexes: from synthesis and crystal structures to electrochemical and cytotoxicity investigation" in Journal of Coordination Chemistry, 70, no. 5 (2017):831-847,
https://doi.org/10.1080/00958972.2017.1282611 . .