TY  - JOUR
AU  - Dimitrijević, Milena
AU  - Bogdanović Pristov, Jelena
AU  - Žižić, Milan
AU  - Stanković, Dalibor M.
AU  - Bajuk-Bogdanović, Danica
AU  - Stanić, Marina
AU  - Spasic, Snežana
AU  - Hagen, Wilfred
AU  - Spasojević, Ivan
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1246
AB  - Biliverdin (BV), a product of heme catabolism, is known to interact with transition metals, but the details of such interactions under physiological conditions are scarce. Herein, we examined coordinate/redox interactions of BV with Cu2+ in phosphate buffer at pH 7.4, using spectrophotometry, HESI-MS, Raman spectroscopy, H-1 NMR, EPR, fluorimetry, and electrochemical methods. BV formed a stable coordination complex with copper in 1:1 stoichiometry. The structure of BV was more planar and energetically stable in the complex. The complex showed strong paramagnetic effects that were attributed to an unpaired delocalized e(-). The delocalized electron may come from BV or Cu2+, so the complex is formally composed either of BV radical cation and Cu1+ or of BV radical anion and Cu3+. The complex underwent oxidation only in the presence of both O-2 and an excess of Cu2+, or a strong oxidizing agent, and it was resistant to reducing agents. The biological effects of the stable BV metallocomplex containing a delocalized unpaired electron should be further examined, and may provide an answer to the long-standing question of high energy investment in the catabolism of BV, which represents a relatively harmless molecule per se.
PB  - Royal Soc Chemistry, Cambridge
T2  - Dalton Transactions
T1  - Biliverdin-copper complex at physiological pH
EP  - 6070
IS  - 18
SP  - 6061
VL  - 48
DO  - 10.1039/c8dt04724c
ER  - 

@article{
author = "Dimitrijević, Milena and Bogdanović Pristov, Jelena and Žižić, Milan and Stanković, Dalibor M. and Bajuk-Bogdanović, Danica and Stanić, Marina and Spasic, Snežana and Hagen, Wilfred and Spasojević, Ivan",
year = "2019",
abstract = "Biliverdin (BV), a product of heme catabolism, is known to interact with transition metals, but the details of such interactions under physiological conditions are scarce. Herein, we examined coordinate/redox interactions of BV with Cu2+ in phosphate buffer at pH 7.4, using spectrophotometry, HESI-MS, Raman spectroscopy, H-1 NMR, EPR, fluorimetry, and electrochemical methods. BV formed a stable coordination complex with copper in 1:1 stoichiometry. The structure of BV was more planar and energetically stable in the complex. The complex showed strong paramagnetic effects that were attributed to an unpaired delocalized e(-). The delocalized electron may come from BV or Cu2+, so the complex is formally composed either of BV radical cation and Cu1+ or of BV radical anion and Cu3+. The complex underwent oxidation only in the presence of both O-2 and an excess of Cu2+, or a strong oxidizing agent, and it was resistant to reducing agents. The biological effects of the stable BV metallocomplex containing a delocalized unpaired electron should be further examined, and may provide an answer to the long-standing question of high energy investment in the catabolism of BV, which represents a relatively harmless molecule per se.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Dalton Transactions",
title = "Biliverdin-copper complex at physiological pH",
pages = "6070-6061",
number = "18",
volume = "48",
doi = "10.1039/c8dt04724c"
}

Dimitrijević, M., Bogdanović Pristov, J., Žižić, M., Stanković, D. M., Bajuk-Bogdanović, D., Stanić, M., Spasic, S., Hagen, W.,& Spasojević, I.. (2019). Biliverdin-copper complex at physiological pH. in Dalton Transactions
Royal Soc Chemistry, Cambridge., 48(18), 6061-6070.
https://doi.org/10.1039/c8dt04724c

Dimitrijević M, Bogdanović Pristov J, Žižić M, Stanković DM, Bajuk-Bogdanović D, Stanić M, Spasic S, Hagen W, Spasojević I. Biliverdin-copper complex at physiological pH. in Dalton Transactions. 2019;48(18):6061-6070.
doi:10.1039/c8dt04724c .

Dimitrijević, Milena, Bogdanović Pristov, Jelena, Žižić, Milan, Stanković, Dalibor M., Bajuk-Bogdanović, Danica, Stanić, Marina, Spasic, Snežana, Hagen, Wilfred, Spasojević, Ivan, "Biliverdin-copper complex at physiological pH" in Dalton Transactions, 48, no. 18 (2019):6061-6070,
https://doi.org/10.1039/c8dt04724c . .

TY  - JOUR
AU  - Bozic, Bojana
AU  - Korać Jačić, Jelena
AU  - Stanković, Dalibor M.
AU  - Stanić, Marina
AU  - Romanović, Mima
AU  - Bogdanović Pristov, Jelena
AU  - Spasic, Snežana
AU  - Popovic-Bijelic, Ana
AU  - Spasojević, Ivan
AU  - Bajčetić, Milica
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1111
AB  - An increase in the copper pool in body fluids has been related to a number of pathological conditions, including infections. Copper ions may affect antibiotics via the formation of coordination bonds and/or redox reactions. Herein, we analyzed the interactions of Cu2+ with eight beta-lactam antibiotics using UV-Vis spectrophotometry, EPR spectroscopy, and electrochemical methods. Penicillin G did not show any detectable interactions with Cu2+. Ampicillin, amoxicillin and cephalexin formed stable colored complexes with octahedral coordination environment of Cu2+ with tetragonal distortion, and primary amine group as the site of coordinate bond formation. These beta-lactams increased the solubility of Cu2+ in the phosphate buffer. Ceftazidime and Cu2+ formed a complex with a similar geometry and gave rise to an organic radical. Ceftriaxone-Cu2+ complex appears to exhibit different geometry. All complexes showed 1: 1 stoichiometry. Cefaclor reduced Cu2+ to Cu1+ that further reacted with molecular oxygen to produce hydrogen peroxide. Finally, meropenem underwent degradation in the presence of copper. The analysis of activity against Escherichia coli and Staphylococcus aureus showed that the effects of meropenem, amoxicillin, ampicillin, and ceftriaxone were significantly hindered in the presence of copper ions. The interactions with copper ions should be taken into account regarding the problem of antibiotic resistance and in the selection of the most efficient antimicrobial therapy for patients with altered copper homeostasis.
PB  - Elsevier Science Inc, New York
T2  - Free Radical Biology and Medicine
T1  - Coordination and redox interactions of beta-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity
EP  - 285
SP  - 279
VL  - 129
DO  - 10.1016/j.freeradbiomed.2018.09.038
ER  - 

@article{
author = "Bozic, Bojana and Korać Jačić, Jelena and Stanković, Dalibor M. and Stanić, Marina and Romanović, Mima and Bogdanović Pristov, Jelena and Spasic, Snežana and Popovic-Bijelic, Ana and Spasojević, Ivan and Bajčetić, Milica",
year = "2018",
abstract = "An increase in the copper pool in body fluids has been related to a number of pathological conditions, including infections. Copper ions may affect antibiotics via the formation of coordination bonds and/or redox reactions. Herein, we analyzed the interactions of Cu2+ with eight beta-lactam antibiotics using UV-Vis spectrophotometry, EPR spectroscopy, and electrochemical methods. Penicillin G did not show any detectable interactions with Cu2+. Ampicillin, amoxicillin and cephalexin formed stable colored complexes with octahedral coordination environment of Cu2+ with tetragonal distortion, and primary amine group as the site of coordinate bond formation. These beta-lactams increased the solubility of Cu2+ in the phosphate buffer. Ceftazidime and Cu2+ formed a complex with a similar geometry and gave rise to an organic radical. Ceftriaxone-Cu2+ complex appears to exhibit different geometry. All complexes showed 1: 1 stoichiometry. Cefaclor reduced Cu2+ to Cu1+ that further reacted with molecular oxygen to produce hydrogen peroxide. Finally, meropenem underwent degradation in the presence of copper. The analysis of activity against Escherichia coli and Staphylococcus aureus showed that the effects of meropenem, amoxicillin, ampicillin, and ceftriaxone were significantly hindered in the presence of copper ions. The interactions with copper ions should be taken into account regarding the problem of antibiotic resistance and in the selection of the most efficient antimicrobial therapy for patients with altered copper homeostasis.",
publisher = "Elsevier Science Inc, New York",
journal = "Free Radical Biology and Medicine",
title = "Coordination and redox interactions of beta-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity",
pages = "285-279",
volume = "129",
doi = "10.1016/j.freeradbiomed.2018.09.038"
}

Bozic, B., Korać Jačić, J., Stanković, D. M., Stanić, M., Romanović, M., Bogdanović Pristov, J., Spasic, S., Popovic-Bijelic, A., Spasojević, I.,& Bajčetić, M.. (2018). Coordination and redox interactions of beta-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity. in Free Radical Biology and Medicine
Elsevier Science Inc, New York., 129, 279-285.
https://doi.org/10.1016/j.freeradbiomed.2018.09.038

Bozic B, Korać Jačić J, Stanković DM, Stanić M, Romanović M, Bogdanović Pristov J, Spasic S, Popovic-Bijelic A, Spasojević I, Bajčetić M. Coordination and redox interactions of beta-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity. in Free Radical Biology and Medicine. 2018;129:279-285.
doi:10.1016/j.freeradbiomed.2018.09.038 .

Bozic, Bojana, Korać Jačić, Jelena, Stanković, Dalibor M., Stanić, Marina, Romanović, Mima, Bogdanović Pristov, Jelena, Spasic, Snežana, Popovic-Bijelic, Ana, Spasojević, Ivan, Bajčetić, Milica, "Coordination and redox interactions of beta-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity" in Free Radical Biology and Medicine, 129 (2018):279-285,
https://doi.org/10.1016/j.freeradbiomed.2018.09.038 . .

TY  - JOUR
AU  - Martinov, Jelena
AU  - Krstic, Miodrag
AU  - Spasic, Snežana
AU  - Miletic, Srdjan
AU  - Stefanovic-Kojic, Jovana
AU  - Nikolić-Kokić, Aleksandra
AU  - Blagojević, Duško
AU  - Spasojević, Ivan
AU  - Spasić, Mihajlo
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1050
AB  - Pectin is the main soluble fiber in apples or citruses. It may be fermented by gut microbiota to metabolites showing local intestinal and systemic effects. A wide range of beneficial effects of dietary pectin includes impacts on the redox milieu and microbiota profile. We prepared pectin-derived oligosaccharides (apple (APDO) and citrus) and polygalacturonic acid-derived oligosaccharides, using alkaline hydrolysis by hydrogen peroxide, and analyzed them by Foufier Transform Infrared spectrometry. Furthermore, we analyzed the effects of pectin derived oligosaccharides on hydroxyl radical (HO center dot)-generating Fenton reaction using electron paramagnetic resonance spin-trapping spectroscopy, and the effects on the growth of Escherichia coli and Staphylococcus minus in the presence of dietary-relevant HO center dot-generating system (iron + ascorbate). The oligosaccharides react with HO center dot radical to produce carbon dioxide radical anion (CO2 center dot (-)). A comparative analysis showed that APDO has the most prominent bacteriostatic effect. This might be at least partially related to the higher capacity of APDO to produce CO2 center dot (-), which specifically targets proteins and appears to have a longer lifetime and larger diffusion radius in biological systems compared to HO center dot.
PB  - Elsevier Science Bv, Amsterdam
T2  - Food Research International
T1  - Apple pectin-derived oligosaccharides produce carbon dioxide radical anion in Fenton reaction and prevent growth of Escherichia coli and Staphylococcus aureus
EP  - 136
SP  - 132
VL  - 100
DO  - 10.1016/j.foodres.2017.08.040
ER  - 

@article{
author = "Martinov, Jelena and Krstic, Miodrag and Spasic, Snežana and Miletic, Srdjan and Stefanovic-Kojic, Jovana and Nikolić-Kokić, Aleksandra and Blagojević, Duško and Spasojević, Ivan and Spasić, Mihajlo",
year = "2017",
abstract = "Pectin is the main soluble fiber in apples or citruses. It may be fermented by gut microbiota to metabolites showing local intestinal and systemic effects. A wide range of beneficial effects of dietary pectin includes impacts on the redox milieu and microbiota profile. We prepared pectin-derived oligosaccharides (apple (APDO) and citrus) and polygalacturonic acid-derived oligosaccharides, using alkaline hydrolysis by hydrogen peroxide, and analyzed them by Foufier Transform Infrared spectrometry. Furthermore, we analyzed the effects of pectin derived oligosaccharides on hydroxyl radical (HO center dot)-generating Fenton reaction using electron paramagnetic resonance spin-trapping spectroscopy, and the effects on the growth of Escherichia coli and Staphylococcus minus in the presence of dietary-relevant HO center dot-generating system (iron + ascorbate). The oligosaccharides react with HO center dot radical to produce carbon dioxide radical anion (CO2 center dot (-)). A comparative analysis showed that APDO has the most prominent bacteriostatic effect. This might be at least partially related to the higher capacity of APDO to produce CO2 center dot (-), which specifically targets proteins and appears to have a longer lifetime and larger diffusion radius in biological systems compared to HO center dot.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Food Research International",
title = "Apple pectin-derived oligosaccharides produce carbon dioxide radical anion in Fenton reaction and prevent growth of Escherichia coli and Staphylococcus aureus",
pages = "136-132",
volume = "100",
doi = "10.1016/j.foodres.2017.08.040"
}

Martinov, J., Krstic, M., Spasic, S., Miletic, S., Stefanovic-Kojic, J., Nikolić-Kokić, A., Blagojević, D., Spasojević, I.,& Spasić, M.. (2017). Apple pectin-derived oligosaccharides produce carbon dioxide radical anion in Fenton reaction and prevent growth of Escherichia coli and Staphylococcus aureus. in Food Research International
Elsevier Science Bv, Amsterdam., 100, 132-136.
https://doi.org/10.1016/j.foodres.2017.08.040

Martinov J, Krstic M, Spasic S, Miletic S, Stefanovic-Kojic J, Nikolić-Kokić A, Blagojević D, Spasojević I, Spasić M. Apple pectin-derived oligosaccharides produce carbon dioxide radical anion in Fenton reaction and prevent growth of Escherichia coli and Staphylococcus aureus. in Food Research International. 2017;100:132-136.
doi:10.1016/j.foodres.2017.08.040 .

Martinov, Jelena, Krstic, Miodrag, Spasic, Snežana, Miletic, Srdjan, Stefanovic-Kojic, Jovana, Nikolić-Kokić, Aleksandra, Blagojević, Duško, Spasojević, Ivan, Spasić, Mihajlo, "Apple pectin-derived oligosaccharides produce carbon dioxide radical anion in Fenton reaction and prevent growth of Escherichia coli and Staphylococcus aureus" in Food Research International, 100 (2017):132-136,
https://doi.org/10.1016/j.foodres.2017.08.040 . .

TY  - JOUR
AU  - Marinković, Vesna
AU  - Rankovic-Janevski, Milica
AU  - Spasic, Snežana
AU  - Nikolić-Kokić, Aleksandra
AU  - Lugonja, Nikoleta
AU  - Djurović, Dijana
AU  - Miletic, Srdjan
AU  - Vrvić, Miroslav M.
AU  - Spasojević, Ivan
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/974
AB  - Objectives: Milk banks collect, pasteurize, and freeze/store human milk. The processing may alter redox properties of milk, but the effects have not been fully examined. Methods: We collected 10 mature milk and 10 colostrum samples and applied a battery of biochemical assays and electron paramagnetic resonance spectroscopy to inspect changes that milk undergoes with pasteurization and 30 days storage at -20 degrees C. Results: Pasteurization and storage of raw milk did not affect total nonenzymatic antioxidative capacity, but specific components and features were altered. Urate radical and ascorbyl radical emerge as products of exposure of milk to hydroxyl radical-generating system. Processing shifted the load of antioxidative activity from ascorbate to urate and lowered the capacity of milk to diminish hydroxyl radical. Pasteurization caused a significant drop in the activity of 2 major antioxidative enzymes-superoxide dismutase and glutathione peroxidase, whereas freezing/storage of raw milk affected only superoxide dismutase. Colostrum showed drastically higher total nonenzymatic antioxidative capacity, hydroxyl radical scavenging ability, and glutathione reductase activity compared with mature milk. Conclusions: Pasteurization and storage affect nonenzymatic and enzymatic antioxidative agents in human milk. It appears that nonenzymatic antioxidative systems in colostrum and milk are different. The effects of processing may be partially compensated by fortification/spiking with ascorbate before use.
PB  - Lippincott Williams & Wilkins, Philadelphia
T2  - Journal of Pediatric Gastroenterology and Nutrition
T1  - Antioxidative Activity of Colostrum and Human Milk: Effects of Pasteurization and Storage
EP  - 906
IS  - 6
SP  - 901
VL  - 62
DO  - 10.1097/MPG.0000000000001090
ER  - 

@article{
author = "Marinković, Vesna and Rankovic-Janevski, Milica and Spasic, Snežana and Nikolić-Kokić, Aleksandra and Lugonja, Nikoleta and Djurović, Dijana and Miletic, Srdjan and Vrvić, Miroslav M. and Spasojević, Ivan",
year = "2016",
abstract = "Objectives: Milk banks collect, pasteurize, and freeze/store human milk. The processing may alter redox properties of milk, but the effects have not been fully examined. Methods: We collected 10 mature milk and 10 colostrum samples and applied a battery of biochemical assays and electron paramagnetic resonance spectroscopy to inspect changes that milk undergoes with pasteurization and 30 days storage at -20 degrees C. Results: Pasteurization and storage of raw milk did not affect total nonenzymatic antioxidative capacity, but specific components and features were altered. Urate radical and ascorbyl radical emerge as products of exposure of milk to hydroxyl radical-generating system. Processing shifted the load of antioxidative activity from ascorbate to urate and lowered the capacity of milk to diminish hydroxyl radical. Pasteurization caused a significant drop in the activity of 2 major antioxidative enzymes-superoxide dismutase and glutathione peroxidase, whereas freezing/storage of raw milk affected only superoxide dismutase. Colostrum showed drastically higher total nonenzymatic antioxidative capacity, hydroxyl radical scavenging ability, and glutathione reductase activity compared with mature milk. Conclusions: Pasteurization and storage affect nonenzymatic and enzymatic antioxidative agents in human milk. It appears that nonenzymatic antioxidative systems in colostrum and milk are different. The effects of processing may be partially compensated by fortification/spiking with ascorbate before use.",
publisher = "Lippincott Williams & Wilkins, Philadelphia",
journal = "Journal of Pediatric Gastroenterology and Nutrition",
title = "Antioxidative Activity of Colostrum and Human Milk: Effects of Pasteurization and Storage",
pages = "906-901",
number = "6",
volume = "62",
doi = "10.1097/MPG.0000000000001090"
}

Marinković, V., Rankovic-Janevski, M., Spasic, S., Nikolić-Kokić, A., Lugonja, N., Djurović, D., Miletic, S., Vrvić, M. M.,& Spasojević, I.. (2016). Antioxidative Activity of Colostrum and Human Milk: Effects of Pasteurization and Storage. in Journal of Pediatric Gastroenterology and Nutrition
Lippincott Williams & Wilkins, Philadelphia., 62(6), 901-906.
https://doi.org/10.1097/MPG.0000000000001090

Marinković V, Rankovic-Janevski M, Spasic S, Nikolić-Kokić A, Lugonja N, Djurović D, Miletic S, Vrvić MM, Spasojević I. Antioxidative Activity of Colostrum and Human Milk: Effects of Pasteurization and Storage. in Journal of Pediatric Gastroenterology and Nutrition. 2016;62(6):901-906.
doi:10.1097/MPG.0000000000001090 .

Marinković, Vesna, Rankovic-Janevski, Milica, Spasic, Snežana, Nikolić-Kokić, Aleksandra, Lugonja, Nikoleta, Djurović, Dijana, Miletic, Srdjan, Vrvić, Miroslav M., Spasojević, Ivan, "Antioxidative Activity of Colostrum and Human Milk: Effects of Pasteurization and Storage" in Journal of Pediatric Gastroenterology and Nutrition, 62, no. 6 (2016):901-906,
https://doi.org/10.1097/MPG.0000000000001090 . .

TY  - JOUR
AU  - Bolic, Bojana
AU  - Mijusković, Ana
AU  - Popovic-Bijelic, Ana
AU  - Nikolić-Kokić, Aleksandra
AU  - Spasic, Snežana
AU  - Blagojević, Duško
AU  - Spasić, Mihajlo
AU  - Spasojević, Ivan
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/846
AB  - Interactions of hydrogen sulfide (HS-/H2S), a reducing signaling species, with superoxide dimutases (SOD) are poorly understood. We applied low-T EPR spectroscopy to examine the effects of HS-/H2S and superoxide radical anion (O-2(-)) on metallocenters of FeSOD, MnSOD, and CuZnSOD. HS-/H2S did not affect FeSOD, whereas active centers of MnSOD and CuZnSOD were open to this agent. Cu2+ was reduced to Cu1+, while manganese appears to be released from MnSOD active center. Untreated and O-2(-) treated FeSOD and MnSOD predominantly show 5 d-electron systems, i.e. Fe3+ and Mn2+. Our study provides new details on the mechanisms of (patho)physiological effects of HS-/H2S.
PB  - Academic Press Inc Elsevier Science, San Diego
T2  - Nitric Oxide-Biology and Chemistry
T1  - Reactions of superoxide dismutases with HS-/H2S and superoxide radical anion: An in vitro EPR study
EP  - 23
SP  - 19
VL  - 51
DO  - 10.1016/j.niox.2015.09.008
ER  - 

@article{
author = "Bolic, Bojana and Mijusković, Ana and Popovic-Bijelic, Ana and Nikolić-Kokić, Aleksandra and Spasic, Snežana and Blagojević, Duško and Spasić, Mihajlo and Spasojević, Ivan",
year = "2015",
abstract = "Interactions of hydrogen sulfide (HS-/H2S), a reducing signaling species, with superoxide dimutases (SOD) are poorly understood. We applied low-T EPR spectroscopy to examine the effects of HS-/H2S and superoxide radical anion (O-2(-)) on metallocenters of FeSOD, MnSOD, and CuZnSOD. HS-/H2S did not affect FeSOD, whereas active centers of MnSOD and CuZnSOD were open to this agent. Cu2+ was reduced to Cu1+, while manganese appears to be released from MnSOD active center. Untreated and O-2(-) treated FeSOD and MnSOD predominantly show 5 d-electron systems, i.e. Fe3+ and Mn2+. Our study provides new details on the mechanisms of (patho)physiological effects of HS-/H2S.",
publisher = "Academic Press Inc Elsevier Science, San Diego",
journal = "Nitric Oxide-Biology and Chemistry",
title = "Reactions of superoxide dismutases with HS-/H2S and superoxide radical anion: An in vitro EPR study",
pages = "23-19",
volume = "51",
doi = "10.1016/j.niox.2015.09.008"
}

Bolic, B., Mijusković, A., Popovic-Bijelic, A., Nikolić-Kokić, A., Spasic, S., Blagojević, D., Spasić, M.,& Spasojević, I.. (2015). Reactions of superoxide dismutases with HS-/H2S and superoxide radical anion: An in vitro EPR study. in Nitric Oxide-Biology and Chemistry
Academic Press Inc Elsevier Science, San Diego., 51, 19-23.
https://doi.org/10.1016/j.niox.2015.09.008

Bolic B, Mijusković A, Popovic-Bijelic A, Nikolić-Kokić A, Spasic S, Blagojević D, Spasić M, Spasojević I. Reactions of superoxide dismutases with HS-/H2S and superoxide radical anion: An in vitro EPR study. in Nitric Oxide-Biology and Chemistry. 2015;51:19-23.
doi:10.1016/j.niox.2015.09.008 .

Bolic, Bojana, Mijusković, Ana, Popovic-Bijelic, Ana, Nikolić-Kokić, Aleksandra, Spasic, Snežana, Blagojević, Duško, Spasić, Mihajlo, Spasojević, Ivan, "Reactions of superoxide dismutases with HS-/H2S and superoxide radical anion: An in vitro EPR study" in Nitric Oxide-Biology and Chemistry, 51 (2015):19-23,
https://doi.org/10.1016/j.niox.2015.09.008 . .

TY  - CONF
AU  - Ristic, Aleksandar J
AU  - Sokic, Dragoslav
AU  - Baščarević, Vladimir
AU  - Spasic, Snežana D
AU  - Vojvodic, Nikola M
AU  - Savić, Slobodan
AU  - Raicević, Savo
AU  - Kovacević, Masa
AU  - Savić, Danijela Z
AU  - Spasojević, Ivan
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/789
AB  - Altered hippocampal metallome is strongly implicated in the pathology of mesial temporal lobe epilepsy with hippocampal sclerosis (mTLE-HS). We aimed to determine sodium, potassium, calcium, magnesium, iron, copper, manganese, and zinc concentration in epileptic human hippocampi.
PB  - Wiley-Blackwell, Hoboken
C3  - Epilepsia
T1  - Metallome of sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy
EP  - 190
SP  - 190
VL  - 55
DO  - 10.1111/epi.12675
UR  - https://hdl.handle.net/21.15107/rcub_cer_1554
ER  - 

@conference{
author = "Ristic, Aleksandar J and Sokic, Dragoslav and Baščarević, Vladimir and Spasic, Snežana D and Vojvodic, Nikola M and Savić, Slobodan and Raicević, Savo and Kovacević, Masa and Savić, Danijela Z and Spasojević, Ivan",
year = "2014",
abstract = "Altered hippocampal metallome is strongly implicated in the pathology of mesial temporal lobe epilepsy with hippocampal sclerosis (mTLE-HS). We aimed to determine sodium, potassium, calcium, magnesium, iron, copper, manganese, and zinc concentration in epileptic human hippocampi.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Epilepsia",
title = "Metallome of sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy",
pages = "190-190",
volume = "55",
doi = "10.1111/epi.12675",
url = "https://hdl.handle.net/21.15107/rcub_cer_1554"
}

Ristic, A. J., Sokic, D., Baščarević, V., Spasic, S. D., Vojvodic, N. M., Savić, S., Raicević, S., Kovacević, M., Savić, D. Z.,& Spasojević, I.. (2014). Metallome of sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy. in Epilepsia
Wiley-Blackwell, Hoboken., 55, 190-190.
https://doi.org/10.1111/epi.12675
https://hdl.handle.net/21.15107/rcub_cer_1554

Ristic AJ, Sokic D, Baščarević V, Spasic SD, Vojvodic NM, Savić S, Raicević S, Kovacević M, Savić DZ, Spasojević I. Metallome of sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy. in Epilepsia. 2014;55:190-190.
doi:10.1111/epi.12675
https://hdl.handle.net/21.15107/rcub_cer_1554 .

Ristic, Aleksandar J, Sokic, Dragoslav, Baščarević, Vladimir, Spasic, Snežana D, Vojvodic, Nikola M, Savić, Slobodan, Raicević, Savo, Kovacević, Masa, Savić, Danijela Z, Spasojević, Ivan, "Metallome of sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy" in Epilepsia, 55 (2014):190-190,
https://doi.org/10.1111/epi.12675 .,
https://hdl.handle.net/21.15107/rcub_cer_1554 .

TY  - JOUR
AU  - Ristic, Aleksandar J
AU  - Sokic, Dragoslav
AU  - Baščarević, Vladimir
AU  - Spasic, Snežana D
AU  - Vojvodic, Nikola M
AU  - Savić, Slobodan
AU  - Raicević, Savo
AU  - Kovacević, Masa
AU  - Savić, Danijela Z
AU  - Spasojević, Ivan
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/791
AB  - An altered metal and electrolyte profile has been implicated in the pathologic mechanisms of chronic epilepsy; however, no study has comprehensively measured hippocampal concentrations of these elements in patients with mesial temporal lobe epilepsy and hippocampal sclerosis (mTLE-HS). We therefore analyzed hippocampi of 24 patients with drug-resistant mTLE-HS (mean age 35.69.4years) who underwent anterior temporal lobe resection and amygdalohippocampectomy and 17 hippocampi obtained by autopsy from 13 controls (mean age 40.5 +/- 12.9years), using inductively coupled plasma optical emission spectrometry (ICP-OES). Epileptic hippocampi showed significantly lower concentrations (g/g of tissue) of copper (HS: 2.34 +/- 0.12; control [C]: 3.57 +/- 0.33; p lt 0.001), manganese (HS: 0.205 +/- 0.030; C: 0.409 +/- 0.064; p=0.004), and potassium (HS: 2,001 +/- 59; C: 2,322 +/- 61; p lt 0.001), and increased sodium levels (HS: 1,131 +/- 22; C: 1,040 +/- 25; p=0.010). Zinc, iron, calcium, and magnesium levels did not differ in HS and controls. In summary, copper and manganese levels are deficient, whereas iron level is unchanged in hippocampi from patients with mTLE-HS. Our results provide a basis for understanding the potential involvement of different metals and electrolytes in the pathology of HS. A PowerPoint slide summarizing this article is available for download in the Supporting Information section .
PB  - Wiley-Blackwell, Hoboken
T2  - Epilepsia
T1  - Metals and electrolytes in sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy
EP  - E37
IS  - 5
SP  - E34
VL  - 55
DO  - 10.1111/epi.12593
ER  - 

@article{
author = "Ristic, Aleksandar J and Sokic, Dragoslav and Baščarević, Vladimir and Spasic, Snežana D and Vojvodic, Nikola M and Savić, Slobodan and Raicević, Savo and Kovacević, Masa and Savić, Danijela Z and Spasojević, Ivan",
year = "2014",
abstract = "An altered metal and electrolyte profile has been implicated in the pathologic mechanisms of chronic epilepsy; however, no study has comprehensively measured hippocampal concentrations of these elements in patients with mesial temporal lobe epilepsy and hippocampal sclerosis (mTLE-HS). We therefore analyzed hippocampi of 24 patients with drug-resistant mTLE-HS (mean age 35.69.4years) who underwent anterior temporal lobe resection and amygdalohippocampectomy and 17 hippocampi obtained by autopsy from 13 controls (mean age 40.5 +/- 12.9years), using inductively coupled plasma optical emission spectrometry (ICP-OES). Epileptic hippocampi showed significantly lower concentrations (g/g of tissue) of copper (HS: 2.34 +/- 0.12; control [C]: 3.57 +/- 0.33; p lt 0.001), manganese (HS: 0.205 +/- 0.030; C: 0.409 +/- 0.064; p=0.004), and potassium (HS: 2,001 +/- 59; C: 2,322 +/- 61; p lt 0.001), and increased sodium levels (HS: 1,131 +/- 22; C: 1,040 +/- 25; p=0.010). Zinc, iron, calcium, and magnesium levels did not differ in HS and controls. In summary, copper and manganese levels are deficient, whereas iron level is unchanged in hippocampi from patients with mTLE-HS. Our results provide a basis for understanding the potential involvement of different metals and electrolytes in the pathology of HS. A PowerPoint slide summarizing this article is available for download in the Supporting Information section .",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Epilepsia",
title = "Metals and electrolytes in sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy",
pages = "E37-E34",
number = "5",
volume = "55",
doi = "10.1111/epi.12593"
}

Ristic, A. J., Sokic, D., Baščarević, V., Spasic, S. D., Vojvodic, N. M., Savić, S., Raicević, S., Kovacević, M., Savić, D. Z.,& Spasojević, I.. (2014). Metals and electrolytes in sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy. in Epilepsia
Wiley-Blackwell, Hoboken., 55(5), E34-E37.
https://doi.org/10.1111/epi.12593

Ristic AJ, Sokic D, Baščarević V, Spasic SD, Vojvodic NM, Savić S, Raicević S, Kovacević M, Savić DZ, Spasojević I. Metals and electrolytes in sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy. in Epilepsia. 2014;55(5):E34-E37.
doi:10.1111/epi.12593 .

Ristic, Aleksandar J, Sokic, Dragoslav, Baščarević, Vladimir, Spasic, Snežana D, Vojvodic, Nikola M, Savić, Slobodan, Raicević, Savo, Kovacević, Masa, Savić, Danijela Z, Spasojević, Ivan, "Metals and electrolytes in sclerotic hippocampi in patients with drug-resistant mesial temporal lobe epilepsy" in Epilepsia, 55, no. 5 (2014):E34-E37,
https://doi.org/10.1111/epi.12593 . .

TY  - JOUR
AU  - Bajčetić, Milica
AU  - Spasic, Snežana
AU  - Spasojević, Ivan
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/818
AB  - Neonatal sepsis is one of the most fulminating conditions in neonatal intensive care units. Antipathogen and supportive care are administered routinely, but do not deliver satisfactory results. In addition, the efforts to treat neonatal sepsis with anti-inflammatory agents have generally shown to be futile. The accumulating data imply that intracellular redox changes intertwined into neonatal sepsis redox cycle represent the main cause of dysfunction of mitochondria and cells in neonatal sepsis. Our aim here is to support the new philosophy in neonatal sepsis treatment, which involves the integration of mechanisms that are responsible for cellular dysfunction and organ failure, the recognition of the most important targets, and the selection of safe agents that can stop the neonatal sepsis redox cycle by hitting the hot spots. Redox-active agents that could be beneficial for neonatal sepsis treatment according to these criteria include lactoferrin, interleukin 10, zinc and selenium supplements, ibuprofen, edaravone, and pentoxifylline.
PB  - Lippincott Williams & Wilkins, Philadelphia
T2  - Shock
T1  - Redox therapy in neonatal sepsis: reasons, targets, strategy, and agents
EP  - 184
IS  - 3
SP  - 179
VL  - 42
DO  - 10.1097/SHK.0000000000000198
ER  - 

@article{
author = "Bajčetić, Milica and Spasic, Snežana and Spasojević, Ivan",
year = "2014",
abstract = "Neonatal sepsis is one of the most fulminating conditions in neonatal intensive care units. Antipathogen and supportive care are administered routinely, but do not deliver satisfactory results. In addition, the efforts to treat neonatal sepsis with anti-inflammatory agents have generally shown to be futile. The accumulating data imply that intracellular redox changes intertwined into neonatal sepsis redox cycle represent the main cause of dysfunction of mitochondria and cells in neonatal sepsis. Our aim here is to support the new philosophy in neonatal sepsis treatment, which involves the integration of mechanisms that are responsible for cellular dysfunction and organ failure, the recognition of the most important targets, and the selection of safe agents that can stop the neonatal sepsis redox cycle by hitting the hot spots. Redox-active agents that could be beneficial for neonatal sepsis treatment according to these criteria include lactoferrin, interleukin 10, zinc and selenium supplements, ibuprofen, edaravone, and pentoxifylline.",
publisher = "Lippincott Williams & Wilkins, Philadelphia",
journal = "Shock",
title = "Redox therapy in neonatal sepsis: reasons, targets, strategy, and agents",
pages = "184-179",
number = "3",
volume = "42",
doi = "10.1097/SHK.0000000000000198"
}

Bajčetić, M., Spasic, S.,& Spasojević, I.. (2014). Redox therapy in neonatal sepsis: reasons, targets, strategy, and agents. in Shock
Lippincott Williams & Wilkins, Philadelphia., 42(3), 179-184.
https://doi.org/10.1097/SHK.0000000000000198

Bajčetić M, Spasic S, Spasojević I. Redox therapy in neonatal sepsis: reasons, targets, strategy, and agents. in Shock. 2014;42(3):179-184.
doi:10.1097/SHK.0000000000000198 .

Bajčetić, Milica, Spasic, Snežana, Spasojević, Ivan, "Redox therapy in neonatal sepsis: reasons, targets, strategy, and agents" in Shock, 42, no. 3 (2014):179-184,
https://doi.org/10.1097/SHK.0000000000000198 . .

TY  - JOUR
AU  - Bajčetić, Milica
AU  - Otasević, Biljana
AU  - Bozinovic-Prekajski, Niveska
AU  - Spasic, Snežana
AU  - Spasojević, Ivan
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/817
AB  - Background: Vitamin E is routinely supplemented to preterm babies, including those with neonatal sepsis. Our aim was to examine the effects of neonatal sepsis and vitamin E on antioxidative system (AOS) in the blood. Methods: A prospective, randomized, open label study involved 65 preterm neonates (control/sepsis - 34/31), which were divided into two subgroups - non-supplemented and supplemented with vitamin E (25 IU/day for 60 days). The activities of superoxide dismutase, catalase (CAT), glutathione peroxidase (GPx), and glutathione reductase (GR) were determined in erythrocytes at days 0, 30, and 60, following sepsis diagnosis. Results: There was no difference in the activity of AOS between controls and neonates with ongoing sepsis. At 60 days, septic neonates showed higher CAT activity compared to controls (P = 0.027), and lower GPx activity compared to 0 days (P = 0.022). The later was mitigated by vitamin E, which on the other hand provoked lower GPx activity at 30 days, compared to untreated septic neonates (P = 0.014). In addition, vitamin E suppressed GR activity in septic neonates (P = 0.025 and P = 0.017 at 30 and 60 days). Finally, vitamin E supplementation in control neonates provoked a significant increase of GPx activity (P = 0.015 at 60 days). Conclusions: The absence of altered redox settings in the blood of neonates during sepsis episode, and vitamin E-provoked decrease in the activity of some components of AOS, suggest that the supplementation of vitamin E in these patients might not be rational.
PB  - Sage Publications Inc, Thousand Oaks
T2  - Annals of Clinical Biochemistry
T1  - Antioxidative system in the erythrocytes of preterm neonates with sepsis: the effects of vitamin E supplementation
EP  - 556
IS  - 5
SP  - 550
VL  - 51
DO  - 10.1177/0004563213503317
ER  - 

@article{
author = "Bajčetić, Milica and Otasević, Biljana and Bozinovic-Prekajski, Niveska and Spasic, Snežana and Spasojević, Ivan",
year = "2014",
abstract = "Background: Vitamin E is routinely supplemented to preterm babies, including those with neonatal sepsis. Our aim was to examine the effects of neonatal sepsis and vitamin E on antioxidative system (AOS) in the blood. Methods: A prospective, randomized, open label study involved 65 preterm neonates (control/sepsis - 34/31), which were divided into two subgroups - non-supplemented and supplemented with vitamin E (25 IU/day for 60 days). The activities of superoxide dismutase, catalase (CAT), glutathione peroxidase (GPx), and glutathione reductase (GR) were determined in erythrocytes at days 0, 30, and 60, following sepsis diagnosis. Results: There was no difference in the activity of AOS between controls and neonates with ongoing sepsis. At 60 days, septic neonates showed higher CAT activity compared to controls (P = 0.027), and lower GPx activity compared to 0 days (P = 0.022). The later was mitigated by vitamin E, which on the other hand provoked lower GPx activity at 30 days, compared to untreated septic neonates (P = 0.014). In addition, vitamin E suppressed GR activity in septic neonates (P = 0.025 and P = 0.017 at 30 and 60 days). Finally, vitamin E supplementation in control neonates provoked a significant increase of GPx activity (P = 0.015 at 60 days). Conclusions: The absence of altered redox settings in the blood of neonates during sepsis episode, and vitamin E-provoked decrease in the activity of some components of AOS, suggest that the supplementation of vitamin E in these patients might not be rational.",
publisher = "Sage Publications Inc, Thousand Oaks",
journal = "Annals of Clinical Biochemistry",
title = "Antioxidative system in the erythrocytes of preterm neonates with sepsis: the effects of vitamin E supplementation",
pages = "556-550",
number = "5",
volume = "51",
doi = "10.1177/0004563213503317"
}

Bajčetić, M., Otasević, B., Bozinovic-Prekajski, N., Spasic, S.,& Spasojević, I.. (2014). Antioxidative system in the erythrocytes of preterm neonates with sepsis: the effects of vitamin E supplementation. in Annals of Clinical Biochemistry
Sage Publications Inc, Thousand Oaks., 51(5), 550-556.
https://doi.org/10.1177/0004563213503317

Bajčetić M, Otasević B, Bozinovic-Prekajski N, Spasic S, Spasojević I. Antioxidative system in the erythrocytes of preterm neonates with sepsis: the effects of vitamin E supplementation. in Annals of Clinical Biochemistry. 2014;51(5):550-556.
doi:10.1177/0004563213503317 .

Bajčetić, Milica, Otasević, Biljana, Bozinovic-Prekajski, Niveska, Spasic, Snežana, Spasojević, Ivan, "Antioxidative system in the erythrocytes of preterm neonates with sepsis: the effects of vitamin E supplementation" in Annals of Clinical Biochemistry, 51, no. 5 (2014):550-556,
https://doi.org/10.1177/0004563213503317 . .

TY  - JOUR
AU  - Lugonja, Nikoleta
AU  - Spasic, Snežana D
AU  - Laugier, Olga B
AU  - Nikolić-Kokić, Aleksandra
AU  - Spasojević, Ivan
AU  - Oreščanin-Dušić, Zorana
AU  - Vrvić, Miroslav M
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/700
AB  - Objective: Early-onset and exclusive breast-feeding provides a significant health benefit to infants compared with infant formulas. The aim of this study was to compare mature breast milk with standard infant formulas by examining their effects on non-vascular smooth muscle contraction and their antioxidative properties. Methods: The pharmacologic effects of breast milk and formulas were examined using a model system of the rat uterine smooth muscle contraction. Electron paramagnetic resonance spin-trapping spectroscopy was used to compare the antioxidative capacities of breast milk (obtained in the ninth week of lactation) with commercial infant formulas against hydroxyl radical production in the Fenton reaction. The activities of superoxide dismutase, glutathione peroxidase, and the sulfhydryl group were determined in the breast milk and infant formulas. Results: In contrast to the infant formulas, breast milk exerted a relaxing effect on isolated non-vascular smooth muscle. In general, breast milk showed higher antioxidative activity compared with the infant formulas. In all samples, the generation of hydroxyl radicals led to the formation of carbon-centered and ascorbyl radicals. Conclusions: Human milk exerts direct pharmacologic relaxation effects and provides better antioxidant protection compared with infant formulas because of the presence of specific enzymatic components, such as human superoxide dismutase. We propose that these effects should be advantageous to an infant's gastrointestinal tract by supporting the normal work of the smooth musculature and maintaining redox homeostasis and may represent one of the mechanisms by which breast-feeding benefits health.
PB  - Elsevier Science Inc, New York
T2  - Nutrition
T1  - Differences in direct pharmacologic effects and antioxidative properties of mature breast milk and infant formulas
EP  - 435
IS  - 2
SP  - 431
VL  - 29
DO  - 10.1016/j.nut.2012.07.018
ER  - 

@article{
author = "Lugonja, Nikoleta and Spasic, Snežana D and Laugier, Olga B and Nikolić-Kokić, Aleksandra and Spasojević, Ivan and Oreščanin-Dušić, Zorana and Vrvić, Miroslav M",
year = "2013",
abstract = "Objective: Early-onset and exclusive breast-feeding provides a significant health benefit to infants compared with infant formulas. The aim of this study was to compare mature breast milk with standard infant formulas by examining their effects on non-vascular smooth muscle contraction and their antioxidative properties. Methods: The pharmacologic effects of breast milk and formulas were examined using a model system of the rat uterine smooth muscle contraction. Electron paramagnetic resonance spin-trapping spectroscopy was used to compare the antioxidative capacities of breast milk (obtained in the ninth week of lactation) with commercial infant formulas against hydroxyl radical production in the Fenton reaction. The activities of superoxide dismutase, glutathione peroxidase, and the sulfhydryl group were determined in the breast milk and infant formulas. Results: In contrast to the infant formulas, breast milk exerted a relaxing effect on isolated non-vascular smooth muscle. In general, breast milk showed higher antioxidative activity compared with the infant formulas. In all samples, the generation of hydroxyl radicals led to the formation of carbon-centered and ascorbyl radicals. Conclusions: Human milk exerts direct pharmacologic relaxation effects and provides better antioxidant protection compared with infant formulas because of the presence of specific enzymatic components, such as human superoxide dismutase. We propose that these effects should be advantageous to an infant's gastrointestinal tract by supporting the normal work of the smooth musculature and maintaining redox homeostasis and may represent one of the mechanisms by which breast-feeding benefits health.",
publisher = "Elsevier Science Inc, New York",
journal = "Nutrition",
title = "Differences in direct pharmacologic effects and antioxidative properties of mature breast milk and infant formulas",
pages = "435-431",
number = "2",
volume = "29",
doi = "10.1016/j.nut.2012.07.018"
}

Lugonja, N., Spasic, S. D., Laugier, O. B., Nikolić-Kokić, A., Spasojević, I., Oreščanin-Dušić, Z.,& Vrvić, M. M.. (2013). Differences in direct pharmacologic effects and antioxidative properties of mature breast milk and infant formulas. in Nutrition
Elsevier Science Inc, New York., 29(2), 431-435.
https://doi.org/10.1016/j.nut.2012.07.018

Lugonja N, Spasic SD, Laugier OB, Nikolić-Kokić A, Spasojević I, Oreščanin-Dušić Z, Vrvić MM. Differences in direct pharmacologic effects and antioxidative properties of mature breast milk and infant formulas. in Nutrition. 2013;29(2):431-435.
doi:10.1016/j.nut.2012.07.018 .

Lugonja, Nikoleta, Spasic, Snežana D, Laugier, Olga B, Nikolić-Kokić, Aleksandra, Spasojević, Ivan, Oreščanin-Dušić, Zorana, Vrvić, Miroslav M, "Differences in direct pharmacologic effects and antioxidative properties of mature breast milk and infant formulas" in Nutrition, 29, no. 2 (2013):431-435,
https://doi.org/10.1016/j.nut.2012.07.018 . .

TY  - JOUR
AU  - Spasojević, Ivan
AU  - Obradović, Budimir
AU  - Spasic, Snežana D
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/578
AB  - The present review is aimed at elucidating the neonatal 'sepsis redox cycle' - the cascade of inflammatory and redox events involved in the pathogenesis of sepsis in neonates. While adult and neonatal sepses share some common features, there are some substantial differences: higher mortality rates occur in adult sepsis and worse long-term effects are evident in neonatal sepsis survivors. Such epidemiological data may be explained by the lower ability of IL6 and IL8 to activate NF-kappa B-regulated transcription in neonatal sepsis in comparison to TNF-alpha, which is involved in the mechanisms of adult sepsis. The activation of NF-kappa B in neonatal sepsis is further promoted by hydrogen peroxide and results in mitochondrial dysfunction and energy failure as septic neonates experience decreased O-2 consumption as well as lower heat production and body temperature in comparison to healthy peers. In neonates, specific organs that are still under development are vulnerable to sepsis-provoked stress, which may lead to brain, lung, and heart injury, as well as vision and hearing impairments. In the light of the processes integrated here, it is clear that therapeutic approaches should also target specific steps in the neonatal 'sepsis redox cycle' in addition to the current therapeutic approach that is mainly focused on pathogen eradication.
PB  - Bmc, London
T2  - Critical Care
T1  - Bench-to-bedside review: Neonatal sepsis - redox processes in pathogenesis
IS  - 3
VL  - 16
DO  - 10.1186/cc11183
ER  - 

@article{
author = "Spasojević, Ivan and Obradović, Budimir and Spasic, Snežana D",
year = "2012",
abstract = "The present review is aimed at elucidating the neonatal 'sepsis redox cycle' - the cascade of inflammatory and redox events involved in the pathogenesis of sepsis in neonates. While adult and neonatal sepses share some common features, there are some substantial differences: higher mortality rates occur in adult sepsis and worse long-term effects are evident in neonatal sepsis survivors. Such epidemiological data may be explained by the lower ability of IL6 and IL8 to activate NF-kappa B-regulated transcription in neonatal sepsis in comparison to TNF-alpha, which is involved in the mechanisms of adult sepsis. The activation of NF-kappa B in neonatal sepsis is further promoted by hydrogen peroxide and results in mitochondrial dysfunction and energy failure as septic neonates experience decreased O-2 consumption as well as lower heat production and body temperature in comparison to healthy peers. In neonates, specific organs that are still under development are vulnerable to sepsis-provoked stress, which may lead to brain, lung, and heart injury, as well as vision and hearing impairments. In the light of the processes integrated here, it is clear that therapeutic approaches should also target specific steps in the neonatal 'sepsis redox cycle' in addition to the current therapeutic approach that is mainly focused on pathogen eradication.",
publisher = "Bmc, London",
journal = "Critical Care",
title = "Bench-to-bedside review: Neonatal sepsis - redox processes in pathogenesis",
number = "3",
volume = "16",
doi = "10.1186/cc11183"
}

Spasojević, I., Obradović, B.,& Spasic, S. D.. (2012). Bench-to-bedside review: Neonatal sepsis - redox processes in pathogenesis. in Critical Care
Bmc, London., 16(3).
https://doi.org/10.1186/cc11183

Spasojević I, Obradović B, Spasic SD. Bench-to-bedside review: Neonatal sepsis - redox processes in pathogenesis. in Critical Care. 2012;16(3).
doi:10.1186/cc11183 .

Spasojević, Ivan, Obradović, Budimir, Spasic, Snežana D, "Bench-to-bedside review: Neonatal sepsis - redox processes in pathogenesis" in Critical Care, 16, no. 3 (2012),
https://doi.org/10.1186/cc11183 . .

TY  - JOUR
AU  - Andrades, Michael Everton
AU  - Morina, Arian
AU  - Spasic, Snežana D
AU  - Spasojević, Ivan
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/480
AB  - The pathogenesis of sepsis and its progression to multiple organ dysfunction syndrome and septic shock have been the subject of investigations for nearly half a century. Controversies still exist with regard to understanding the molecular pathophysiology of sepsis in relation to the complex roles played by reactive oxygen species, nitric oxide, complements and cytokines. In the present review we categorise the key turning points in sepsis development and outline the most probable sequence of events leading to cellular dysfunction and organ failure under septic conditions. We have applied an integrative approach in order to fuse current state-of-the-art knowledge about redox processes involving hydrogen peroxide, nitric oxide, superoxide, peroxynitrite and hydroxyl radical, which lead to mitochondrial respiratory dysfunction. Finally, from this point of view, the potential of redox therapy targeting sepsis is discussed.
PB  - Bmc, London
T2  - Critical Care
T1  - Bench-to-bedside review: Sepsis - from the redox point of view
IS  - 5
VL  - 15
DO  - 10.1186/cc10334
ER  - 

@article{
author = "Andrades, Michael Everton and Morina, Arian and Spasic, Snežana D and Spasojević, Ivan",
year = "2011",
abstract = "The pathogenesis of sepsis and its progression to multiple organ dysfunction syndrome and septic shock have been the subject of investigations for nearly half a century. Controversies still exist with regard to understanding the molecular pathophysiology of sepsis in relation to the complex roles played by reactive oxygen species, nitric oxide, complements and cytokines. In the present review we categorise the key turning points in sepsis development and outline the most probable sequence of events leading to cellular dysfunction and organ failure under septic conditions. We have applied an integrative approach in order to fuse current state-of-the-art knowledge about redox processes involving hydrogen peroxide, nitric oxide, superoxide, peroxynitrite and hydroxyl radical, which lead to mitochondrial respiratory dysfunction. Finally, from this point of view, the potential of redox therapy targeting sepsis is discussed.",
publisher = "Bmc, London",
journal = "Critical Care",
title = "Bench-to-bedside review: Sepsis - from the redox point of view",
number = "5",
volume = "15",
doi = "10.1186/cc10334"
}

Andrades, M. E., Morina, A., Spasic, S. D.,& Spasojević, I.. (2011). Bench-to-bedside review: Sepsis - from the redox point of view. in Critical Care
Bmc, London., 15(5).
https://doi.org/10.1186/cc10334

Andrades ME, Morina A, Spasic SD, Spasojević I. Bench-to-bedside review: Sepsis - from the redox point of view. in Critical Care. 2011;15(5).
doi:10.1186/cc10334 .

Andrades, Michael Everton, Morina, Arian, Spasic, Snežana D, Spasojević, Ivan, "Bench-to-bedside review: Sepsis - from the redox point of view" in Critical Care, 15, no. 5 (2011),
https://doi.org/10.1186/cc10334 . .

TY  - JOUR
AU  - Spasojević, Ivan
AU  - Mojović, Miloš
AU  - Stević, Zorica D
AU  - Spasic, Snežana D
AU  - Jones, David R
AU  - Morina, Arian
AU  - Spasić, Mihajlo
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/417
AB  - A breakdown in homeostasis of redox-active metals represents an important factor for neurodegeneration. We have used EPR spectroscopy and BMPO spin-trap to investigate the catalytic properties and ligand modulation of redox activity of copper and iron in human cerebrospinal fluid (CSF). In contrast to iron, copper supplementation provoked a statistically significant increase in hydroxyl free radical generation in CSF treated with H(2)O(2). However, in a binary copper/iron containing Fenton system, iron catalytically activated copper. The chelator EDTA, which represents a model of physiological metal ligands, completely prevented copper's redox activity in CSF, while iron chelation led to a significant increase in hydroxyl radical generation, indicating that copper and iron do not only have diverse catalytic properties in the CSF but also that their redox activities are differently modulated by ligands. The application of DDC reduced hydroxyl radical generation in the CSF containing catalytically active metals (free Cu(2+) or Fe(3+)-EDTA complex). We conclude that chelators, such as DDC, are capable of preventing the pro-oxidative activity of both metals and may be suitable for reducing hydroxyl radical formation in certain pathophysiological settings.
PB  - Maney Publishing, Leeds
T2  - Redox Report
T1  - Bioavailability and catalytic properties of copper and iron for Fenton chemistry in human cerebrospinal fluid
EP  - 35
IS  - 1
SP  - 29
VL  - 15
DO  - 10.1179/174329210X12650506623087
ER  - 

@article{
author = "Spasojević, Ivan and Mojović, Miloš and Stević, Zorica D and Spasic, Snežana D and Jones, David R and Morina, Arian and Spasić, Mihajlo",
year = "2010",
abstract = "A breakdown in homeostasis of redox-active metals represents an important factor for neurodegeneration. We have used EPR spectroscopy and BMPO spin-trap to investigate the catalytic properties and ligand modulation of redox activity of copper and iron in human cerebrospinal fluid (CSF). In contrast to iron, copper supplementation provoked a statistically significant increase in hydroxyl free radical generation in CSF treated with H(2)O(2). However, in a binary copper/iron containing Fenton system, iron catalytically activated copper. The chelator EDTA, which represents a model of physiological metal ligands, completely prevented copper's redox activity in CSF, while iron chelation led to a significant increase in hydroxyl radical generation, indicating that copper and iron do not only have diverse catalytic properties in the CSF but also that their redox activities are differently modulated by ligands. The application of DDC reduced hydroxyl radical generation in the CSF containing catalytically active metals (free Cu(2+) or Fe(3+)-EDTA complex). We conclude that chelators, such as DDC, are capable of preventing the pro-oxidative activity of both metals and may be suitable for reducing hydroxyl radical formation in certain pathophysiological settings.",
publisher = "Maney Publishing, Leeds",
journal = "Redox Report",
title = "Bioavailability and catalytic properties of copper and iron for Fenton chemistry in human cerebrospinal fluid",
pages = "35-29",
number = "1",
volume = "15",
doi = "10.1179/174329210X12650506623087"
}

Spasojević, I., Mojović, M., Stević, Z. D., Spasic, S. D., Jones, D. R., Morina, A.,& Spasić, M.. (2010). Bioavailability and catalytic properties of copper and iron for Fenton chemistry in human cerebrospinal fluid. in Redox Report
Maney Publishing, Leeds., 15(1), 29-35.
https://doi.org/10.1179/174329210X12650506623087

Spasojević I, Mojović M, Stević ZD, Spasic SD, Jones DR, Morina A, Spasić M. Bioavailability and catalytic properties of copper and iron for Fenton chemistry in human cerebrospinal fluid. in Redox Report. 2010;15(1):29-35.
doi:10.1179/174329210X12650506623087 .

Spasojević, Ivan, Mojović, Miloš, Stević, Zorica D, Spasic, Snežana D, Jones, David R, Morina, Arian, Spasić, Mihajlo, "Bioavailability and catalytic properties of copper and iron for Fenton chemistry in human cerebrospinal fluid" in Redox Report, 15, no. 1 (2010):29-35,
https://doi.org/10.1179/174329210X12650506623087 . .

TY  - JOUR
AU  - Spasojević, Ivan
AU  - Mojović, Miloš
AU  - Blagojević, Duško
AU  - Spasic, Snežana D.
AU  - Jones, David R
AU  - Nikolić-Kokić, Aleksandra
AU  - Spasić, Mihajlo
PY  - 2009
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/321
AB  - The hydroxyl radical ((OH)-O-center dot) has detrimental biological activity due to its very high reactivity. Our experiments were designed to determine the effects of equimolar concentrations of glucose, fructose and mannitol and three phosphorylated forms of fructose (fructose-1-phosphate (F1P): fructose-6-phosphate (F6P): and fructose-1,6-bis(phosphate) (F16BP)) on (OH)-O-center dot radical production via the Fenton reaction. EPR spectroscopy using spin-trap DEPMPO was applied to detect radical production. We found that the percentage inhibition of (OH)-O-center dot radical formation decreased in the order F16BP > F1P > F6P > fructose > mannitol = glucose. As ketoses can sequester redox-active iron thus preventing the Fenton reaction, the Haber-Weiss-like system was also employed to generate (OH)-O-center dot, so that the effect of iron sequestration could be distinguished from direct (OH)-O-center dot radical scavenging. In the latter system, the rank order of (OH)-O-center dot scavenging activity was F16BP > F1P > F6P > fructose = mannitol = glucose. Our results clearly demonstrate that intracellular phosphorylated forms of fructose have more scavenging properties than fructose or glucose, leading us to conclude that the acute administration of fructose could overcome the body's reaction to exogenous antioxidants during appropriate therapy in certain pathophysiological conditions related to oxidative stress, Such as sepsis, neurodegenerative diseases, atherosclerosis, malignancy, and some complications of pregnancy.
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Research
T1  - Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical
EP  - 84
IS  - 1
SP  - 80
VL  - 344
DO  - 10.1016/j.carres.2008.09.025
ER  - 

@article{
author = "Spasojević, Ivan and Mojović, Miloš and Blagojević, Duško and Spasic, Snežana D. and Jones, David R and Nikolić-Kokić, Aleksandra and Spasić, Mihajlo",
year = "2009",
abstract = "The hydroxyl radical ((OH)-O-center dot) has detrimental biological activity due to its very high reactivity. Our experiments were designed to determine the effects of equimolar concentrations of glucose, fructose and mannitol and three phosphorylated forms of fructose (fructose-1-phosphate (F1P): fructose-6-phosphate (F6P): and fructose-1,6-bis(phosphate) (F16BP)) on (OH)-O-center dot radical production via the Fenton reaction. EPR spectroscopy using spin-trap DEPMPO was applied to detect radical production. We found that the percentage inhibition of (OH)-O-center dot radical formation decreased in the order F16BP > F1P > F6P > fructose > mannitol = glucose. As ketoses can sequester redox-active iron thus preventing the Fenton reaction, the Haber-Weiss-like system was also employed to generate (OH)-O-center dot, so that the effect of iron sequestration could be distinguished from direct (OH)-O-center dot radical scavenging. In the latter system, the rank order of (OH)-O-center dot scavenging activity was F16BP > F1P > F6P > fructose = mannitol = glucose. Our results clearly demonstrate that intracellular phosphorylated forms of fructose have more scavenging properties than fructose or glucose, leading us to conclude that the acute administration of fructose could overcome the body's reaction to exogenous antioxidants during appropriate therapy in certain pathophysiological conditions related to oxidative stress, Such as sepsis, neurodegenerative diseases, atherosclerosis, malignancy, and some complications of pregnancy.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Research",
title = "Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical",
pages = "84-80",
number = "1",
volume = "344",
doi = "10.1016/j.carres.2008.09.025"
}

Spasojević, I., Mojović, M., Blagojević, D., Spasic, S. D., Jones, D. R., Nikolić-Kokić, A.,& Spasić, M.. (2009). Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical. in Carbohydrate Research
Elsevier Sci Ltd, Oxford., 344(1), 80-84.
https://doi.org/10.1016/j.carres.2008.09.025

Spasojević I, Mojović M, Blagojević D, Spasic SD, Jones DR, Nikolić-Kokić A, Spasić M. Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical. in Carbohydrate Research. 2009;344(1):80-84.
doi:10.1016/j.carres.2008.09.025 .

Spasojević, Ivan, Mojović, Miloš, Blagojević, Duško, Spasic, Snežana D., Jones, David R, Nikolić-Kokić, Aleksandra, Spasić, Mihajlo, "Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical" in Carbohydrate Research, 344, no. 1 (2009):80-84,
https://doi.org/10.1016/j.carres.2008.09.025 . .