TY  - JOUR
AU  - Pirković, Andrea
AU  - Lazić, Vesna
AU  - Spremo-Potparević, Biljana
AU  - Živković, Lada
AU  - Topalović, Dijana
AU  - Kuzman, Sanja
AU  - Antić-Stanković, Jelena
AU  - Božić, Dragana
AU  - Jovanović Krivokuća, Milica
AU  - Nedeljković, Jovan
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11219
AB  - Dry olive leaf extract (DOLE) and its active component oleuropein (OLE) were applied as reducing and stabilizing agents to prepare colloidal 20–25 nm silver nanoparticles (Ag NPs). The Ag NPs were characterized using transmission electron microscopy, X-ray diffraction analysis, and absorption spectroscopy. The cytotoxic actions of coated Ag NPs, and their inorganic and organic components, were examined against trophoblast cells and human peripheral blood lymphocytes (PBLs), Gram-positive, Gram-negative bacteria, and yeast. The genotoxic potential was evaluated in PBLs in vitro with the comet assay. Ag/DOLE and Ag/OLE induced cytotoxic effects in both types of cells after 24 h exposure when silver concentrations were 0.025–0.2 mM. However, the most pronounced cytotoxicity exhibits Ag/OLE. Both colloids also caused reduced ROS production in both cell types at 0.1 mM and 0.2 mM, while bare Ag NPs did not alter ROS levels at any of the conditions. Functionalized Ag/DOLE and Ag/OLE did not show genotoxic effects in PBLs, while bare AgNPs increased DNA damage significantly only at 0.2 mM. Regarding the antimicrobial effects, the Ag/OLE had MIC values for all evaluated microorganisms from 0.0625 to less than 0.0312 mM. Also, the antimicrobial effect of Ag/DOLE was significantly higher on Gram-negative bacteria and yeast than on Gram-positive bacteria. Obtained results indicate that Ag/OLE induced the most pronounced biological effects, beneficial for its application as an antimicrobial agent, but with potential risks from exposure to high concentrations that could induce cytotoxicity in healthy human cells.
T2  - Mutagenesis
T1  - Comparative analysis of Ag NPs functionalized with olive leaf extract and oleuropein and toxicity in human trophoblast cells and peripheral blood lymphocytes
VL  - 38
IS  - 3
SP  - 169
EP  - 181
DO  - 10.1093/mutage/gead013
ER  - 

@article{
author = "Pirković, Andrea and Lazić, Vesna and Spremo-Potparević, Biljana and Živković, Lada and Topalović, Dijana and Kuzman, Sanja and Antić-Stanković, Jelena and Božić, Dragana and Jovanović Krivokuća, Milica and Nedeljković, Jovan",
year = "2023",
abstract = "Dry olive leaf extract (DOLE) and its active component oleuropein (OLE) were applied as reducing and stabilizing agents to prepare colloidal 20–25 nm silver nanoparticles (Ag NPs). The Ag NPs were characterized using transmission electron microscopy, X-ray diffraction analysis, and absorption spectroscopy. The cytotoxic actions of coated Ag NPs, and their inorganic and organic components, were examined against trophoblast cells and human peripheral blood lymphocytes (PBLs), Gram-positive, Gram-negative bacteria, and yeast. The genotoxic potential was evaluated in PBLs in vitro with the comet assay. Ag/DOLE and Ag/OLE induced cytotoxic effects in both types of cells after 24 h exposure when silver concentrations were 0.025–0.2 mM. However, the most pronounced cytotoxicity exhibits Ag/OLE. Both colloids also caused reduced ROS production in both cell types at 0.1 mM and 0.2 mM, while bare Ag NPs did not alter ROS levels at any of the conditions. Functionalized Ag/DOLE and Ag/OLE did not show genotoxic effects in PBLs, while bare AgNPs increased DNA damage significantly only at 0.2 mM. Regarding the antimicrobial effects, the Ag/OLE had MIC values for all evaluated microorganisms from 0.0625 to less than 0.0312 mM. Also, the antimicrobial effect of Ag/DOLE was significantly higher on Gram-negative bacteria and yeast than on Gram-positive bacteria. Obtained results indicate that Ag/OLE induced the most pronounced biological effects, beneficial for its application as an antimicrobial agent, but with potential risks from exposure to high concentrations that could induce cytotoxicity in healthy human cells.",
journal = "Mutagenesis",
title = "Comparative analysis of Ag NPs functionalized with olive leaf extract and oleuropein and toxicity in human trophoblast cells and peripheral blood lymphocytes",
volume = "38",
number = "3",
pages = "169-181",
doi = "10.1093/mutage/gead013"
}

Pirković, A., Lazić, V., Spremo-Potparević, B., Živković, L., Topalović, D., Kuzman, S., Antić-Stanković, J., Božić, D., Jovanović Krivokuća, M.,& Nedeljković, J.. (2023). Comparative analysis of Ag NPs functionalized with olive leaf extract and oleuropein and toxicity in human trophoblast cells and peripheral blood lymphocytes. in Mutagenesis, 38(3), 169-181.
https://doi.org/10.1093/mutage/gead013

Pirković A, Lazić V, Spremo-Potparević B, Živković L, Topalović D, Kuzman S, Antić-Stanković J, Božić D, Jovanović Krivokuća M, Nedeljković J. Comparative analysis of Ag NPs functionalized with olive leaf extract and oleuropein and toxicity in human trophoblast cells and peripheral blood lymphocytes. in Mutagenesis. 2023;38(3):169-181.
doi:10.1093/mutage/gead013 .

Pirković, Andrea, Lazić, Vesna, Spremo-Potparević, Biljana, Živković, Lada, Topalović, Dijana, Kuzman, Sanja, Antić-Stanković, Jelena, Božić, Dragana, Jovanović Krivokuća, Milica, Nedeljković, Jovan, "Comparative analysis of Ag NPs functionalized with olive leaf extract and oleuropein and toxicity in human trophoblast cells and peripheral blood lymphocytes" in Mutagenesis, 38, no. 3 (2023):169-181,
https://doi.org/10.1093/mutage/gead013 . .

TY  - JOUR
AU  - Sredojević, Dušan
AU  - Lazić, Vesna M.
AU  - Pirković, Andrea
AU  - Periša, Jovana
AU  - Murafa, Natalija
AU  - Spremo-Potparević, Biljana
AU  - Živković, Lada
AU  - Topalović, Dijana
AU  - Zarubica, Aleksandra
AU  - Jovanović Krivokuća, Milica
AU  - Nedeljković, Jovan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10445
AB  - The antibacterial performance and cytotoxic examination of in situ prepared silver nanoparticles (Ag NPs), on inorganic-organic hybrid nanopowder consisting of zirconium dioxide nanoparticles (ZrO2 NPs) and dihydroquercetin (DHQ), was performed against Gram (−) bacteria Escherichia coli and Gram (+) bacteria Staphylococcus aureus, as well as against human cervical cancer cells HeLa and healthy MRC-5 human cells. The surface modification of ZrO2 NPs, synthesized by the sol-gel method, with DHQ leads to the interfacial charge transfer (ICT) complex formation indicated by the appearance of absorption in the visible spectral range. The prepared samples were thoroughly characterized (TEM, XRD, reflection spectroscopy), and, in addition, the spectroscopic observations are supported by the density functional theory (DFT) calculations using a cluster model. The concentration- and time-dependent antibacterial tests indicated a complete reduction of bacterial species, E. coli and S. aureus, for all investigated concentrations of silver (0.10, 0.25, and 0.50 mg/mL) after 24 h of contact. On the other side, the functionalized ZrO2 NPs with DHQ, before and after deposition of Ag NPs, do not display a significant decrease in the viability of HeLa MRC-5 cells in any of the used concentrations compared to the control.
T2  - Nanomaterials
T1  - Toxicity of Silver Nanoparticles Supported by Surface-Modified Zirconium Dioxide with Dihydroquercetin
VL  - 12
IS  - 18
SP  - 3195
DO  - 10.3390/nano12183195
ER  - 

@article{
author = "Sredojević, Dušan and Lazić, Vesna M. and Pirković, Andrea and Periša, Jovana and Murafa, Natalija and Spremo-Potparević, Biljana and Živković, Lada and Topalović, Dijana and Zarubica, Aleksandra and Jovanović Krivokuća, Milica and Nedeljković, Jovan",
year = "2022",
abstract = "The antibacterial performance and cytotoxic examination of in situ prepared silver nanoparticles (Ag NPs), on inorganic-organic hybrid nanopowder consisting of zirconium dioxide nanoparticles (ZrO2 NPs) and dihydroquercetin (DHQ), was performed against Gram (−) bacteria Escherichia coli and Gram (+) bacteria Staphylococcus aureus, as well as against human cervical cancer cells HeLa and healthy MRC-5 human cells. The surface modification of ZrO2 NPs, synthesized by the sol-gel method, with DHQ leads to the interfacial charge transfer (ICT) complex formation indicated by the appearance of absorption in the visible spectral range. The prepared samples were thoroughly characterized (TEM, XRD, reflection spectroscopy), and, in addition, the spectroscopic observations are supported by the density functional theory (DFT) calculations using a cluster model. The concentration- and time-dependent antibacterial tests indicated a complete reduction of bacterial species, E. coli and S. aureus, for all investigated concentrations of silver (0.10, 0.25, and 0.50 mg/mL) after 24 h of contact. On the other side, the functionalized ZrO2 NPs with DHQ, before and after deposition of Ag NPs, do not display a significant decrease in the viability of HeLa MRC-5 cells in any of the used concentrations compared to the control.",
journal = "Nanomaterials",
title = "Toxicity of Silver Nanoparticles Supported by Surface-Modified Zirconium Dioxide with Dihydroquercetin",
volume = "12",
number = "18",
pages = "3195",
doi = "10.3390/nano12183195"
}

Sredojević, D., Lazić, V. M., Pirković, A., Periša, J., Murafa, N., Spremo-Potparević, B., Živković, L., Topalović, D., Zarubica, A., Jovanović Krivokuća, M.,& Nedeljković, J.. (2022). Toxicity of Silver Nanoparticles Supported by Surface-Modified Zirconium Dioxide with Dihydroquercetin. in Nanomaterials, 12(18), 3195.
https://doi.org/10.3390/nano12183195

Sredojević D, Lazić VM, Pirković A, Periša J, Murafa N, Spremo-Potparević B, Živković L, Topalović D, Zarubica A, Jovanović Krivokuća M, Nedeljković J. Toxicity of Silver Nanoparticles Supported by Surface-Modified Zirconium Dioxide with Dihydroquercetin. in Nanomaterials. 2022;12(18):3195.
doi:10.3390/nano12183195 .

Sredojević, Dušan, Lazić, Vesna M., Pirković, Andrea, Periša, Jovana, Murafa, Natalija, Spremo-Potparević, Biljana, Živković, Lada, Topalović, Dijana, Zarubica, Aleksandra, Jovanović Krivokuća, Milica, Nedeljković, Jovan, "Toxicity of Silver Nanoparticles Supported by Surface-Modified Zirconium Dioxide with Dihydroquercetin" in Nanomaterials, 12, no. 18 (2022):3195,
https://doi.org/10.3390/nano12183195 . .

TY  - JOUR
AU  - Topalović, Dijana
AU  - Živković, Lada
AU  - Đelić, Ninoslav
AU  - Bajić, Vladan P.
AU  - Spremo-Potparević, Biljana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9810
AB  - Objective. Inosine 5'-monophosphate dehydrogenase (IMPDH) activity in cancer cells is increased. Tiazofurin selectively inhibits the activity of IMPDH, and it has been granted for the treatment of different cancers and new viral diseases. Its widespread use was limited because exposure to tiazofurin under certain circumstances was found to have a higher frequency of severe non-hematologic toxicity. Therefore, the objective of this study was to examine genotoxic action and inducement of DNA damage of tiazofurin using the comet assay. Methods. The ability of tiazofurin to induce DNA damage was evaluated using single-cell gel electrophoresis (SCGE) technique/comet assay. Human whole blood cells were exposed to three final concentrations of tiazofurin (1µM/mL, 2 µM/mL, and 5 µM/mL) for 30 min in vitro. Results. Our results indicate that tiazofurin produced a significant level of DNA damage on whole blood cells after 30 min of exposure vs. control. All tested concentrations were significantly comet-forming, in a concentration-dependent manner. Conclusion. Our investigation on the tiazofurin-treated cells and their relationship to the formation of DNA damage demonstrated that the genotoxic effect was induced after exposure to tiazofurin under described conditions.
AB  - Cilj. Aktivnost inozin 5’-monofosfat dehidrogenaze(IMPDH) povećana je u ćelijama karcinoma. Tiazofurin selektivno inhibira aktivnost IMPDH i odobren je za lečenje različitih karcinoma i novih virusnih bolesti. Njegova široko rasprostranjena upotreba bila je ograničena jer je utvrđenoda je izloženost tiazofurinu pod određenim okolnostima imala veću incidencu ozbiljne nehematološke toksičnosti. Stoga je cilj ove studije bio da se pomoću komet testa ispita genotoksično delovanje i izazivanje DNK oštećenja tiazofurinom. Metode. Sposobnost tiazofurina da izazove DNK oštećenje procenjena je primenom elektroforeze DNK pojedinačnih ćelija (SCGE) / komet testa. Ćelije pune krvi su bile izložene trima konačnim koncentracijama tiazofurina (1µM/mL, 2 µM/mL, and 5 µM/mL) tokom 30 minuta in vitro. Rezultati. Naši rezultati ukazuju na to da je tiazofurin proizveo značajan nivo DNK oštećenja na ćelijama pune krvi nakon 30 minuta izlaganja u odnosu na kontrolu. Sve ispitivane koncentracije su dovele do značajnog nastanka kometa, pri čemu je nivo oštećenja rastao s koncentracijom. Zaključak. Naše istraživanje ćelija tretiranih tiazofurinom i njihova reakcija na izazivanje DNK oštećenja pokazalo je da je tiazofurin ispoljio genotoksični efekat pod opisanim uslovima.
T2  - Medicinski časopis
T1  - Analysis of tiazofurin-induced DNA damage in human whole blood cells using an in vitro comet assay
T1  - Analiza dnk oštećenja izazvanog tiazofurinom u humanim ćelijama pune krvi primenom in vitro komet testa
VL  - 54
IS  - 3
SP  - 91
EP  - 95
DO  - 10.5937/mckg54-28798
ER  - 

@article{
author = "Topalović, Dijana and Živković, Lada and Đelić, Ninoslav and Bajić, Vladan P. and Spremo-Potparević, Biljana",
year = "2020",
abstract = "Objective. Inosine 5'-monophosphate dehydrogenase (IMPDH) activity in cancer cells is increased. Tiazofurin selectively inhibits the activity of IMPDH, and it has been granted for the treatment of different cancers and new viral diseases. Its widespread use was limited because exposure to tiazofurin under certain circumstances was found to have a higher frequency of severe non-hematologic toxicity. Therefore, the objective of this study was to examine genotoxic action and inducement of DNA damage of tiazofurin using the comet assay. Methods. The ability of tiazofurin to induce DNA damage was evaluated using single-cell gel electrophoresis (SCGE) technique/comet assay. Human whole blood cells were exposed to three final concentrations of tiazofurin (1µM/mL, 2 µM/mL, and 5 µM/mL) for 30 min in vitro. Results. Our results indicate that tiazofurin produced a significant level of DNA damage on whole blood cells after 30 min of exposure vs. control. All tested concentrations were significantly comet-forming, in a concentration-dependent manner. Conclusion. Our investigation on the tiazofurin-treated cells and their relationship to the formation of DNA damage demonstrated that the genotoxic effect was induced after exposure to tiazofurin under described conditions., Cilj. Aktivnost inozin 5’-monofosfat dehidrogenaze(IMPDH) povećana je u ćelijama karcinoma. Tiazofurin selektivno inhibira aktivnost IMPDH i odobren je za lečenje različitih karcinoma i novih virusnih bolesti. Njegova široko rasprostranjena upotreba bila je ograničena jer je utvrđenoda je izloženost tiazofurinu pod određenim okolnostima imala veću incidencu ozbiljne nehematološke toksičnosti. Stoga je cilj ove studije bio da se pomoću komet testa ispita genotoksično delovanje i izazivanje DNK oštećenja tiazofurinom. Metode. Sposobnost tiazofurina da izazove DNK oštećenje procenjena je primenom elektroforeze DNK pojedinačnih ćelija (SCGE) / komet testa. Ćelije pune krvi su bile izložene trima konačnim koncentracijama tiazofurina (1µM/mL, 2 µM/mL, and 5 µM/mL) tokom 30 minuta in vitro. Rezultati. Naši rezultati ukazuju na to da je tiazofurin proizveo značajan nivo DNK oštećenja na ćelijama pune krvi nakon 30 minuta izlaganja u odnosu na kontrolu. Sve ispitivane koncentracije su dovele do značajnog nastanka kometa, pri čemu je nivo oštećenja rastao s koncentracijom. Zaključak. Naše istraživanje ćelija tretiranih tiazofurinom i njihova reakcija na izazivanje DNK oštećenja pokazalo je da je tiazofurin ispoljio genotoksični efekat pod opisanim uslovima.",
journal = "Medicinski časopis",
title = "Analysis of tiazofurin-induced DNA damage in human whole blood cells using an in vitro comet assay, Analiza dnk oštećenja izazvanog tiazofurinom u humanim ćelijama pune krvi primenom in vitro komet testa",
volume = "54",
number = "3",
pages = "91-95",
doi = "10.5937/mckg54-28798"
}

Topalović, D., Živković, L., Đelić, N., Bajić, V. P.,& Spremo-Potparević, B.. (2020). Analysis of tiazofurin-induced DNA damage in human whole blood cells using an in vitro comet assay. in Medicinski časopis, 54(3), 91-95.
https://doi.org/10.5937/mckg54-28798

Topalović D, Živković L, Đelić N, Bajić VP, Spremo-Potparević B. Analysis of tiazofurin-induced DNA damage in human whole blood cells using an in vitro comet assay. in Medicinski časopis. 2020;54(3):91-95.
doi:10.5937/mckg54-28798 .

Topalović, Dijana, Živković, Lada, Đelić, Ninoslav, Bajić, Vladan P., Spremo-Potparević, Biljana, "Analysis of tiazofurin-induced DNA damage in human whole blood cells using an in vitro comet assay" in Medicinski časopis, 54, no. 3 (2020):91-95,
https://doi.org/10.5937/mckg54-28798 . .

TY  - JOUR
AU  - Živković, Lada
AU  - Bajić, Vladan P.
AU  - Topalović, Dijana
AU  - Bruić, Marija
AU  - Spremo-Potparević, Biljana
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8666
AB  - The health benefits of natural products have long been recognized. Consumption of dietary compounds such as supplements provides an alternative source of natural products to those obtained from the diet. There is a growing concern regarding the possible side effects of using different food supplements simultaneously, since their possible interactions are less known. For the first time, we have tested genotoxic and antigenotoxic effects of Biochaga, in combination with dihydroquercetin. No genotoxic effect on whole blood cells was observed within individual treatment of Biochaga (250 μ g/mL, 500 μ g/mL and 1000 μ g/mL) and dihydroquercetin (100 μ g/mL, 250 μ g/mL and 500 μ g/mL), nor in combination. Afterwards, antigenotoxic potency of both supplements against hydrogen peroxide- (H 2 O 2 -) induced DNA damage to whole blood cells (WBC) was assessed, using the comet assay. Biochaga and dihydroquercetin displayed a strong potential to attenuate H 2 O 2 -induced damage on DNA in cells at all tested concentrations, with a statistical significance ( p < 0.05 ), whereas Biochaga at the dose of 500 μ g/mL in combination with dihydroquercetin 500 μ g/mL was most prominent. Biochaga in combination with dihydroquercetin is able to protect genomic material from oxidative damage induced by hydrogen peroxide in vitro .
T2  - Oxidative Medicine and Cellular Longevity
T1  - Antigenotoxic Effects of Biochaga and Dihydroquercetin (Taxifolin) on H2O2-Induced DNA Damage in Human Whole Blood Cells
VL  - 2019
SP  - 5039372
DO  - 10.1155/2019/5039372
ER  - 

@article{
author = "Živković, Lada and Bajić, Vladan P. and Topalović, Dijana and Bruić, Marija and Spremo-Potparević, Biljana",
year = "2019",
abstract = "The health benefits of natural products have long been recognized. Consumption of dietary compounds such as supplements provides an alternative source of natural products to those obtained from the diet. There is a growing concern regarding the possible side effects of using different food supplements simultaneously, since their possible interactions are less known. For the first time, we have tested genotoxic and antigenotoxic effects of Biochaga, in combination with dihydroquercetin. No genotoxic effect on whole blood cells was observed within individual treatment of Biochaga (250 μ g/mL, 500 μ g/mL and 1000 μ g/mL) and dihydroquercetin (100 μ g/mL, 250 μ g/mL and 500 μ g/mL), nor in combination. Afterwards, antigenotoxic potency of both supplements against hydrogen peroxide- (H 2 O 2 -) induced DNA damage to whole blood cells (WBC) was assessed, using the comet assay. Biochaga and dihydroquercetin displayed a strong potential to attenuate H 2 O 2 -induced damage on DNA in cells at all tested concentrations, with a statistical significance ( p < 0.05 ), whereas Biochaga at the dose of 500 μ g/mL in combination with dihydroquercetin 500 μ g/mL was most prominent. Biochaga in combination with dihydroquercetin is able to protect genomic material from oxidative damage induced by hydrogen peroxide in vitro .",
journal = "Oxidative Medicine and Cellular Longevity",
title = "Antigenotoxic Effects of Biochaga and Dihydroquercetin (Taxifolin) on H2O2-Induced DNA Damage in Human Whole Blood Cells",
volume = "2019",
pages = "5039372",
doi = "10.1155/2019/5039372"
}

Živković, L., Bajić, V. P., Topalović, D., Bruić, M.,& Spremo-Potparević, B.. (2019). Antigenotoxic Effects of Biochaga and Dihydroquercetin (Taxifolin) on H2O2-Induced DNA Damage in Human Whole Blood Cells. in Oxidative Medicine and Cellular Longevity, 2019, 5039372.
https://doi.org/10.1155/2019/5039372

Živković L, Bajić VP, Topalović D, Bruić M, Spremo-Potparević B. Antigenotoxic Effects of Biochaga and Dihydroquercetin (Taxifolin) on H2O2-Induced DNA Damage in Human Whole Blood Cells. in Oxidative Medicine and Cellular Longevity. 2019;2019:5039372.
doi:10.1155/2019/5039372 .

Živković, Lada, Bajić, Vladan P., Topalović, Dijana, Bruić, Marija, Spremo-Potparević, Biljana, "Antigenotoxic Effects of Biochaga and Dihydroquercetin (Taxifolin) on H2O2-Induced DNA Damage in Human Whole Blood Cells" in Oxidative Medicine and Cellular Longevity, 2019 (2019):5039372,
https://doi.org/10.1155/2019/5039372 . .

TY  - JOUR
AU  - Dekanski, Dragana
AU  - Spremo-Potparević, Biljana
AU  - Bajić, Vladan P.
AU  - Živković, Lada
AU  - Topalović, Dijana
AU  - Sredojević, Dušan
AU  - Lazić, Vesna M.
AU  - Nedeljković, Jovan
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0278691518301388
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7790
AB  - The acute toxicity of surface-modified TiO2 nanoparticles (NPs) with caffeic acid (CA) was compared with those of its separate constituents (free CA and bare TiO2 NPs) upon their oral administration in laboratory mice. Prior to in vivo experiments, the interfacial charge transfer (ICT) complex between surface Ti atoms and CA is thoroughly characterized. Composition and stability constants of ICT complex were determined using Job's method and Banesi-Hildebrand analysis, respectively. The experimental data were supported with quantum chemical calculations based on density functional theory (DFT). Acute toxicity signs, including biochemical alterations and extensive histopathological changes in the liver tissue of mice were detected 14 days after oral administration of bare TiO2 NPs. However, the clinical signs of toxicity, the fractional contribution of organs, biochemical parameters of liver and kidney function, and histopathological changes in liver upon treatment with surface-modified TiO2 NPs with CA were not observed. Also, the genotoxic potential of the ICT complex and its constituents were evaluated in leukocytes of whole blood cells in vivo by comet assay. Both, bare and surface-modified TiO2 NPs did not display DNA damaging effect in time frame of 24 h upon their oral administration in mice.
T2  - Food and Chemical Toxicology
T1  - Acute toxicity study in mice of orally administrated TiO 2 nanoparticles functionalized with caffeic acid
VL  - 115
SP  - 42
EP  - 48
DO  - 10.1016/j.fct.2018.02.064
ER  - 

@article{
author = "Dekanski, Dragana and Spremo-Potparević, Biljana and Bajić, Vladan P. and Živković, Lada and Topalović, Dijana and Sredojević, Dušan and Lazić, Vesna M. and Nedeljković, Jovan",
year = "2018",
abstract = "The acute toxicity of surface-modified TiO2 nanoparticles (NPs) with caffeic acid (CA) was compared with those of its separate constituents (free CA and bare TiO2 NPs) upon their oral administration in laboratory mice. Prior to in vivo experiments, the interfacial charge transfer (ICT) complex between surface Ti atoms and CA is thoroughly characterized. Composition and stability constants of ICT complex were determined using Job's method and Banesi-Hildebrand analysis, respectively. The experimental data were supported with quantum chemical calculations based on density functional theory (DFT). Acute toxicity signs, including biochemical alterations and extensive histopathological changes in the liver tissue of mice were detected 14 days after oral administration of bare TiO2 NPs. However, the clinical signs of toxicity, the fractional contribution of organs, biochemical parameters of liver and kidney function, and histopathological changes in liver upon treatment with surface-modified TiO2 NPs with CA were not observed. Also, the genotoxic potential of the ICT complex and its constituents were evaluated in leukocytes of whole blood cells in vivo by comet assay. Both, bare and surface-modified TiO2 NPs did not display DNA damaging effect in time frame of 24 h upon their oral administration in mice.",
journal = "Food and Chemical Toxicology",
title = "Acute toxicity study in mice of orally administrated TiO 2 nanoparticles functionalized with caffeic acid",
volume = "115",
pages = "42-48",
doi = "10.1016/j.fct.2018.02.064"
}

Dekanski, D., Spremo-Potparević, B., Bajić, V. P., Živković, L., Topalović, D., Sredojević, D., Lazić, V. M.,& Nedeljković, J.. (2018). Acute toxicity study in mice of orally administrated TiO 2 nanoparticles functionalized with caffeic acid. in Food and Chemical Toxicology, 115, 42-48.
https://doi.org/10.1016/j.fct.2018.02.064

Dekanski D, Spremo-Potparević B, Bajić VP, Živković L, Topalović D, Sredojević D, Lazić VM, Nedeljković J. Acute toxicity study in mice of orally administrated TiO 2 nanoparticles functionalized with caffeic acid. in Food and Chemical Toxicology. 2018;115:42-48.
doi:10.1016/j.fct.2018.02.064 .

Dekanski, Dragana, Spremo-Potparević, Biljana, Bajić, Vladan P., Živković, Lada, Topalović, Dijana, Sredojević, Dušan, Lazić, Vesna M., Nedeljković, Jovan, "Acute toxicity study in mice of orally administrated TiO 2 nanoparticles functionalized with caffeic acid" in Food and Chemical Toxicology, 115 (2018):42-48,
https://doi.org/10.1016/j.fct.2018.02.064 . .

TY  - JOUR
AU  - Živković, Lada
AU  - Borozan, Sunčica Z.
AU  - Čabarkapa, Andrea
AU  - Topalović, Dijana
AU  - Ciptasari, Ummi
AU  - Bajić, Vladan P.
AU  - Spremo-Potparević, Biljana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1458
AB  - The ability of Agaricus blazei mushroom in its dried and powdered mycelial form was evaluated for its antigenotoxic properties for the first time. Antigenotoxic effects in human peripheral blood cells against H2O2-induced DNA damage were examined in pretreatment and posttreatment protocol by comet assay. The results showed better antigenotoxic properties of Agaricus blazei on the interventional level, respectively, after treatment. Agaricus blazei in concentration of 250 mu g/mL after treatment was most efficient in regard to its action against DNA damage. The evaluation of repair kinetics showed decrease in H2O2 induced DNA damage 15min after the application of A. blazei, reaching the maximum potency after 30 min. Analysis of antioxidant properties of Agaricus blazei revealed strong center dot OH scavenging properties and moderate reducing power, while its DPPH scavenging ability was weak. In regard to our findings, we can conclude that our preliminary results demonstrated antigenotoxic properties of Agaricus blazei and its strong center dot OH scavenging ability. Mechanisms underlying its properties should be further evaluated in in vivo studies.
T2  - Oxidative Medicine and Cellular Longevity
T1  - Antigenotoxic Properties of Agaricus blazei against Hydrogen Peroxide in Human Peripheral Blood Cells
DO  - 10.1155/2017/8759764
ER  - 

@article{
author = "Živković, Lada and Borozan, Sunčica Z. and Čabarkapa, Andrea and Topalović, Dijana and Ciptasari, Ummi and Bajić, Vladan P. and Spremo-Potparević, Biljana",
year = "2017",
abstract = "The ability of Agaricus blazei mushroom in its dried and powdered mycelial form was evaluated for its antigenotoxic properties for the first time. Antigenotoxic effects in human peripheral blood cells against H2O2-induced DNA damage were examined in pretreatment and posttreatment protocol by comet assay. The results showed better antigenotoxic properties of Agaricus blazei on the interventional level, respectively, after treatment. Agaricus blazei in concentration of 250 mu g/mL after treatment was most efficient in regard to its action against DNA damage. The evaluation of repair kinetics showed decrease in H2O2 induced DNA damage 15min after the application of A. blazei, reaching the maximum potency after 30 min. Analysis of antioxidant properties of Agaricus blazei revealed strong center dot OH scavenging properties and moderate reducing power, while its DPPH scavenging ability was weak. In regard to our findings, we can conclude that our preliminary results demonstrated antigenotoxic properties of Agaricus blazei and its strong center dot OH scavenging ability. Mechanisms underlying its properties should be further evaluated in in vivo studies.",
journal = "Oxidative Medicine and Cellular Longevity",
title = "Antigenotoxic Properties of Agaricus blazei against Hydrogen Peroxide in Human Peripheral Blood Cells",
doi = "10.1155/2017/8759764"
}

Živković, L., Borozan, S. Z., Čabarkapa, A., Topalović, D., Ciptasari, U., Bajić, V. P.,& Spremo-Potparević, B.. (2017). Antigenotoxic Properties of Agaricus blazei against Hydrogen Peroxide in Human Peripheral Blood Cells. in Oxidative Medicine and Cellular Longevity.
https://doi.org/10.1155/2017/8759764

Živković L, Borozan SZ, Čabarkapa A, Topalović D, Ciptasari U, Bajić VP, Spremo-Potparević B. Antigenotoxic Properties of Agaricus blazei against Hydrogen Peroxide in Human Peripheral Blood Cells. in Oxidative Medicine and Cellular Longevity. 2017;.
doi:10.1155/2017/8759764 .

Živković, Lada, Borozan, Sunčica Z., Čabarkapa, Andrea, Topalović, Dijana, Ciptasari, Ummi, Bajić, Vladan P., Spremo-Potparević, Biljana, "Antigenotoxic Properties of Agaricus blazei against Hydrogen Peroxide in Human Peripheral Blood Cells" in Oxidative Medicine and Cellular Longevity (2017),
https://doi.org/10.1155/2017/8759764 . .

TY  - JOUR
AU  - Čabarkapa, Andrea
AU  - Dekanski, Dragana
AU  - Živković, Lada
AU  - Milanovic-Cabarkapa, Mirjana
AU  - Bajić, Vladan P.
AU  - Topalović, Dijana
AU  - Giampieri, Francesca
AU  - Gasparrini, Massimiliano
AU  - Battino, Maurizio
AU  - Spremo-Potparević, Biljana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1679
AB  - The CaNa(2)EDTA chelation therapy is often practiced with antioxidant supplementation. Dry olive leaf extract (DOLE) is natural product with antioxidant and DNA protective properties. The effects of DOLE on the levels of DNA damage were investigated ex vivo in peripheral blood lymphocytes (PBLs) of 19 workers occupationally exposed to lead (Pb), before and after CaNa(2)EDTA chelation therapy. POLE demonstrated pronounced radical scavenging activity in concentrations GT = 1 mg/mL, and showed no genotoxicity per se, in concentrations 0.125-1 mg/mL. The level of DNA damage in PBLs of workers before chelation therapy was elevated (24.21 +/- 14.26) compared to controls (6.0 +/- 3.37). The incubation of PBLs before chelation therapy with selected concentration of DOLE lead to a severe increase of DNA damage (64.03 +/- 20.96), exhibiting prooxidant rather than antioxidant effect. After the five-day CaNa2EDTA chelation regimen, DNA damage in PBLs of workers decreased (8.26 +/- 4.62) significantly compared to baseline. Treatment of PBLs with DOLE after chelation, again produced high level of damage (41.82 +/- 23.17) and the acute prooxidant effects of DOLE remained, but, DNA damage was less severe than before chelation. The DOLE exhibits prooxidant effect in presence of Pb in lymphocytes of exposed workers, and its effect is less pronounced following the removal of Pb after standard chelation therapy. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Food and Chemical Toxicology
T1  - Unexpected effect of dry olive leaf extract on the level of DNA damage in lymphocytes of lead intoxicated workers, before and after CaNa(2)EDTA chelation therapy
VL  - 106
SP  - 616
EP  - 623
DO  - 10.1016/j.fct.2016.12.023
ER  - 

@article{
author = "Čabarkapa, Andrea and Dekanski, Dragana and Živković, Lada and Milanovic-Cabarkapa, Mirjana and Bajić, Vladan P. and Topalović, Dijana and Giampieri, Francesca and Gasparrini, Massimiliano and Battino, Maurizio and Spremo-Potparević, Biljana",
year = "2017",
abstract = "The CaNa(2)EDTA chelation therapy is often practiced with antioxidant supplementation. Dry olive leaf extract (DOLE) is natural product with antioxidant and DNA protective properties. The effects of DOLE on the levels of DNA damage were investigated ex vivo in peripheral blood lymphocytes (PBLs) of 19 workers occupationally exposed to lead (Pb), before and after CaNa(2)EDTA chelation therapy. POLE demonstrated pronounced radical scavenging activity in concentrations GT = 1 mg/mL, and showed no genotoxicity per se, in concentrations 0.125-1 mg/mL. The level of DNA damage in PBLs of workers before chelation therapy was elevated (24.21 +/- 14.26) compared to controls (6.0 +/- 3.37). The incubation of PBLs before chelation therapy with selected concentration of DOLE lead to a severe increase of DNA damage (64.03 +/- 20.96), exhibiting prooxidant rather than antioxidant effect. After the five-day CaNa2EDTA chelation regimen, DNA damage in PBLs of workers decreased (8.26 +/- 4.62) significantly compared to baseline. Treatment of PBLs with DOLE after chelation, again produced high level of damage (41.82 +/- 23.17) and the acute prooxidant effects of DOLE remained, but, DNA damage was less severe than before chelation. The DOLE exhibits prooxidant effect in presence of Pb in lymphocytes of exposed workers, and its effect is less pronounced following the removal of Pb after standard chelation therapy. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Food and Chemical Toxicology",
title = "Unexpected effect of dry olive leaf extract on the level of DNA damage in lymphocytes of lead intoxicated workers, before and after CaNa(2)EDTA chelation therapy",
volume = "106",
pages = "616-623",
doi = "10.1016/j.fct.2016.12.023"
}

Čabarkapa, A., Dekanski, D., Živković, L., Milanovic-Cabarkapa, M., Bajić, V. P., Topalović, D., Giampieri, F., Gasparrini, M., Battino, M.,& Spremo-Potparević, B.. (2017). Unexpected effect of dry olive leaf extract on the level of DNA damage in lymphocytes of lead intoxicated workers, before and after CaNa(2)EDTA chelation therapy. in Food and Chemical Toxicology, 106, 616-623.
https://doi.org/10.1016/j.fct.2016.12.023

Čabarkapa A, Dekanski D, Živković L, Milanovic-Cabarkapa M, Bajić VP, Topalović D, Giampieri F, Gasparrini M, Battino M, Spremo-Potparević B. Unexpected effect of dry olive leaf extract on the level of DNA damage in lymphocytes of lead intoxicated workers, before and after CaNa(2)EDTA chelation therapy. in Food and Chemical Toxicology. 2017;106:616-623.
doi:10.1016/j.fct.2016.12.023 .

Čabarkapa, Andrea, Dekanski, Dragana, Živković, Lada, Milanovic-Cabarkapa, Mirjana, Bajić, Vladan P., Topalović, Dijana, Giampieri, Francesca, Gasparrini, Massimiliano, Battino, Maurizio, Spremo-Potparević, Biljana, "Unexpected effect of dry olive leaf extract on the level of DNA damage in lymphocytes of lead intoxicated workers, before and after CaNa(2)EDTA chelation therapy" in Food and Chemical Toxicology, 106 (2017):616-623,
https://doi.org/10.1016/j.fct.2016.12.023 . .

TY  - JOUR
AU  - Topalović Žukovec, Dijana
AU  - Živković, Lada
AU  - Čabarkapa, Andrea
AU  - Đelić, Ninoslav
AU  - Bajić, Vladan P.
AU  - Dekanski, Dragana
AU  - Spremo-Potparević, Biljana
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/432
AB  - The thyroid hormones change the rate of basal metabolism, modulating the consumption of oxygen and causing production of reactive oxygen species, which leads to the development of oxidative stress and DNA strand breaks. Olive (Olea europaea L.) leaf contains many potentially bioactive compounds, making it one of the most potent natural antioxidants. The objective of this study was to evaluate the genotoxicity of L-thyroxine and to investigate antioxidative and antigenotoxic potential of the standardized oleuropein-rich dry olive leaf extract (DOLE) against hydrogen peroxide and L-thyroxine-induced DNA damage in human peripheral blood leukocytes by using the comet assay. Various concentrations of the extract were tested with both DNA damage inducers, under two different experimental conditions, pretreatment and posttreatment. Results indicate that L-thyroxine exhibited genotoxic effect and that DOLE displayed protective effect against thyroxine-induced genotoxicity. The number of cells with DNA damage, was significantly reduced, in both pretreated and posttreated samples (P LT 0.05). Comparing the beneficial effect of all tested concentrations of DOLE, in both experimental protocols, it appears that extract was more effective in reducing DNA damage in the pretreatment, exhibiting protective role against L-thyroxine effect. This feature of DOLE can be explained by its capacity to act as potent free radical scavenger.
T2  - Oxidative Medicine and Cellular Longevity
T1  - Dry Olive Leaf Extract Counteracts L-Thyroxine-Induced Genotoxicity in Human Peripheral Blood Leukocytes In Vitro
DO  - 10.1155/2015/762192
ER  - 

@article{
author = "Topalović Žukovec, Dijana and Živković, Lada and Čabarkapa, Andrea and Đelić, Ninoslav and Bajić, Vladan P. and Dekanski, Dragana and Spremo-Potparević, Biljana",
year = "2015",
abstract = "The thyroid hormones change the rate of basal metabolism, modulating the consumption of oxygen and causing production of reactive oxygen species, which leads to the development of oxidative stress and DNA strand breaks. Olive (Olea europaea L.) leaf contains many potentially bioactive compounds, making it one of the most potent natural antioxidants. The objective of this study was to evaluate the genotoxicity of L-thyroxine and to investigate antioxidative and antigenotoxic potential of the standardized oleuropein-rich dry olive leaf extract (DOLE) against hydrogen peroxide and L-thyroxine-induced DNA damage in human peripheral blood leukocytes by using the comet assay. Various concentrations of the extract were tested with both DNA damage inducers, under two different experimental conditions, pretreatment and posttreatment. Results indicate that L-thyroxine exhibited genotoxic effect and that DOLE displayed protective effect against thyroxine-induced genotoxicity. The number of cells with DNA damage, was significantly reduced, in both pretreated and posttreated samples (P LT 0.05). Comparing the beneficial effect of all tested concentrations of DOLE, in both experimental protocols, it appears that extract was more effective in reducing DNA damage in the pretreatment, exhibiting protective role against L-thyroxine effect. This feature of DOLE can be explained by its capacity to act as potent free radical scavenger.",
journal = "Oxidative Medicine and Cellular Longevity",
title = "Dry Olive Leaf Extract Counteracts L-Thyroxine-Induced Genotoxicity in Human Peripheral Blood Leukocytes In Vitro",
doi = "10.1155/2015/762192"
}

Topalović Žukovec, D., Živković, L., Čabarkapa, A., Đelić, N., Bajić, V. P., Dekanski, D.,& Spremo-Potparević, B.. (2015). Dry Olive Leaf Extract Counteracts L-Thyroxine-Induced Genotoxicity in Human Peripheral Blood Leukocytes In Vitro. in Oxidative Medicine and Cellular Longevity.
https://doi.org/10.1155/2015/762192

Topalović Žukovec D, Živković L, Čabarkapa A, Đelić N, Bajić VP, Dekanski D, Spremo-Potparević B. Dry Olive Leaf Extract Counteracts L-Thyroxine-Induced Genotoxicity in Human Peripheral Blood Leukocytes In Vitro. in Oxidative Medicine and Cellular Longevity. 2015;.
doi:10.1155/2015/762192 .

Topalović Žukovec, Dijana, Živković, Lada, Čabarkapa, Andrea, Đelić, Ninoslav, Bajić, Vladan P., Dekanski, Dragana, Spremo-Potparević, Biljana, "Dry Olive Leaf Extract Counteracts L-Thyroxine-Induced Genotoxicity in Human Peripheral Blood Leukocytes In Vitro" in Oxidative Medicine and Cellular Longevity (2015),
https://doi.org/10.1155/2015/762192 . .