Pavlović, Aleksandar

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  • Pavlović, Aleksandar (3)
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Markers of redox status in patients with nonalcoholic fatty liver disease

Erceg, Sanja; Tomašević, Ratko; Ninić, Ana; Pavlović, Aleksandar; Guzonjić, Azra; Vujčić, Sanja; Mamić, Milica; Mitrović, Bojan; Gluvić, Zoran; Kotur-Stevuljević, Jelena

(Savez farmaceutskih udruženja Srbije (SFUS), 2022)

TY  - CONF
AU  - Erceg, Sanja
AU  - Tomašević, Ratko
AU  - Ninić, Ana
AU  - Pavlović, Aleksandar
AU  - Guzonjić, Azra
AU  - Vujčić, Sanja
AU  - Mamić, Milica
AU  - Mitrović, Bojan
AU  - Gluvić, Zoran
AU  - Kotur-Stevuljević, Jelena
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4511
AB  - Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease,
present in up to 30% of the adult population worldwide (1). Triglycerides accumulation in
hepatocytes (steatosis) represents the root cause of NAFLD and is associated with oxidative
stress, which could further lead to fibrosis and cell death of hepatocytes (2). The aim of this
research was to identify redox status markers for predicting the risk of developing steatosis.
158 participants were included. Steatosis was confirmed by ultrasound in 101 subjects,
while the remaining 57 were in the control group. The following markers of redox status
were determined in serum and plasma samples of all subjects: superoxide dismutase 1
(SOD1), paraoxonase (PON1), malondialdehyde (MDA) and superoxide anion (O2.-). For this
purpose, spectrophotometric methods and enzyme immunosorbent assays were used. SOD1
was statistically significantly higher (P<0.001), while O2 .- was significantly lower in the
patient group (P<0.001). SOD1 was significantly negatively correlated with O2.- (ρ= -0.494,
P<0.001) and MDA (ρ= -0.242, P=0.002). Univariate binary logistic regression analysis
showed a positive association between SOD1 and the presence of steatosis (OR=1.018, 95%
CI 1.005-1.031; P=0.005), as well as a negative association between O2 .- and the presence of
steatosis (OR=0.959, 95% CI 0.941-0.978; P<0.001). Multivariate analysis singled out SOD1
(OR=1.024, 95% CI 1.006-1.041; P=0.007) and O2.- (OR=0.965, 95% CI 0.942-0.989;
P=0.004) as independent predictors for the presence of steatosis in our subjects. The redox
status parameters, SOD1 and O2, respectively, showed a positive and negative prediction of
the presence of statosis in our subjects.
AB  - Nealkoholna masna bolest jetre (eng. nonalcoholic fatty liver disease, NAFLD) je
najčešće hronično oboljenje jetre, prisutno i u do 30% adultne populacije širom sveta (1).
Značajnu ulogu u nastanku NAFLD ima akumulacija triglicerida u hepatocitima – steatoza,
koja je povezana sa oksidativnim stresom, a koji dalje vodi fibrozi i ćelijskoj smrti hepatocita
(2). Cilj ovog istraživanja bio je identifikacija markera redoks statusa za predviđanje rizika za
nastanak steatoze. Studija je obuhvatila 158 ispitanika iz Kliničko bolničkog centra Zemun.
Steatoza je potvrđena ultrazvukom kod 101 ispitanika, dok je preostalih 57 činilo kontrolnu
grupu. U uzorcima seruma i plazme svih ispitanika određeni su sledeći markeri redoks
statusa: superoksid dismutaza 1 (SOD1), paraoksonaza (PON1), malondialdehid (MDA) i
superoksidni anjon (O2.-). U tu svrhu korišćene su spektrofotometrijske metode i enzimski
imunosorbentni testovi. SOD1 je bila statistički značajno viša (P<0,001), dok O 2.- značajno
niži u grupi pacijenata (P<0,001), dok se PON1 i MDA nisu značajno razlikovali između
grupa. SOD1 je bila u značajnoj negativnoj korelaciji sa O 2.- (ρ=-0,494, P<0,001) i MDA (ρ= -
0,242, P=0,002). Univarijatna binarna logistička regresiona analiza je pokazala pozitivnu
asocijaciju između SOD1 i prisustva steatoze (OR=1,018, 95% CI 1,005-1,031; P=0,005), kao i
negativnu asocijaciju između O 2.- i prisustva steatoze (OR=0,959, 95% CI 0,941-0,978;
P<0,001). Multivarijantna analiza je izdvojila SOD1 (OR=1,024, 95% CI 1,006-1,041;
P=0,007) i O2.- (OR=0,965, 95% CI 0,942-0,989; P=0,004) kao nezavisne prediktore za
prisustvo steatoze kod naših ispitanika. Parametri redoks statusa, SOD1 i O 2.- redom, su
pokazali pozitivnu, odnosno negativnu predikciju prisustva statoze kod naših ispitanika.
PB  - Savez farmaceutskih udruženja Srbije (SFUS)
C3  - Arhiv za farmaciju
T1  - Markers of redox status in patients with nonalcoholic fatty liver disease
T1  - Markeri redoks statusa kod pacijenata sa nealkoholnom masnom bolešću jetre
VL  - 72
IS  - 4 suplement
SP  - S233
EP  - S234
UR  - https://hdl.handle.net/21.15107/rcub_farfar_4511
ER  - 
@conference{
author = "Erceg, Sanja and Tomašević, Ratko and Ninić, Ana and Pavlović, Aleksandar and Guzonjić, Azra and Vujčić, Sanja and Mamić, Milica and Mitrović, Bojan and Gluvić, Zoran and Kotur-Stevuljević, Jelena",
year = "2022",
abstract = "Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease,
present in up to 30% of the adult population worldwide (1). Triglycerides accumulation in
hepatocytes (steatosis) represents the root cause of NAFLD and is associated with oxidative
stress, which could further lead to fibrosis and cell death of hepatocytes (2). The aim of this
research was to identify redox status markers for predicting the risk of developing steatosis.
158 participants were included. Steatosis was confirmed by ultrasound in 101 subjects,
while the remaining 57 were in the control group. The following markers of redox status
were determined in serum and plasma samples of all subjects: superoxide dismutase 1
(SOD1), paraoxonase (PON1), malondialdehyde (MDA) and superoxide anion (O2.-). For this
purpose, spectrophotometric methods and enzyme immunosorbent assays were used. SOD1
was statistically significantly higher (P<0.001), while O2 .- was significantly lower in the
patient group (P<0.001). SOD1 was significantly negatively correlated with O2.- (ρ= -0.494,
P<0.001) and MDA (ρ= -0.242, P=0.002). Univariate binary logistic regression analysis
showed a positive association between SOD1 and the presence of steatosis (OR=1.018, 95%
CI 1.005-1.031; P=0.005), as well as a negative association between O2 .- and the presence of
steatosis (OR=0.959, 95% CI 0.941-0.978; P<0.001). Multivariate analysis singled out SOD1
(OR=1.024, 95% CI 1.006-1.041; P=0.007) and O2.- (OR=0.965, 95% CI 0.942-0.989;
P=0.004) as independent predictors for the presence of steatosis in our subjects. The redox
status parameters, SOD1 and O2, respectively, showed a positive and negative prediction of
the presence of statosis in our subjects., Nealkoholna masna bolest jetre (eng. nonalcoholic fatty liver disease, NAFLD) je
najčešće hronično oboljenje jetre, prisutno i u do 30% adultne populacije širom sveta (1).
Značajnu ulogu u nastanku NAFLD ima akumulacija triglicerida u hepatocitima – steatoza,
koja je povezana sa oksidativnim stresom, a koji dalje vodi fibrozi i ćelijskoj smrti hepatocita
(2). Cilj ovog istraživanja bio je identifikacija markera redoks statusa za predviđanje rizika za
nastanak steatoze. Studija je obuhvatila 158 ispitanika iz Kliničko bolničkog centra Zemun.
Steatoza je potvrđena ultrazvukom kod 101 ispitanika, dok je preostalih 57 činilo kontrolnu
grupu. U uzorcima seruma i plazme svih ispitanika određeni su sledeći markeri redoks
statusa: superoksid dismutaza 1 (SOD1), paraoksonaza (PON1), malondialdehid (MDA) i
superoksidni anjon (O2.-). U tu svrhu korišćene su spektrofotometrijske metode i enzimski
imunosorbentni testovi. SOD1 je bila statistički značajno viša (P<0,001), dok O 2.- značajno
niži u grupi pacijenata (P<0,001), dok se PON1 i MDA nisu značajno razlikovali između
grupa. SOD1 je bila u značajnoj negativnoj korelaciji sa O 2.- (ρ=-0,494, P<0,001) i MDA (ρ= -
0,242, P=0,002). Univarijatna binarna logistička regresiona analiza je pokazala pozitivnu
asocijaciju između SOD1 i prisustva steatoze (OR=1,018, 95% CI 1,005-1,031; P=0,005), kao i
negativnu asocijaciju između O 2.- i prisustva steatoze (OR=0,959, 95% CI 0,941-0,978;
P<0,001). Multivarijantna analiza je izdvojila SOD1 (OR=1,024, 95% CI 1,006-1,041;
P=0,007) i O2.- (OR=0,965, 95% CI 0,942-0,989; P=0,004) kao nezavisne prediktore za
prisustvo steatoze kod naših ispitanika. Parametri redoks statusa, SOD1 i O 2.- redom, su
pokazali pozitivnu, odnosno negativnu predikciju prisustva statoze kod naših ispitanika.",
publisher = "Savez farmaceutskih udruženja Srbije (SFUS)",
journal = "Arhiv za farmaciju",
title = "Markers of redox status in patients with nonalcoholic fatty liver disease, Markeri redoks statusa kod pacijenata sa nealkoholnom masnom bolešću jetre",
volume = "72",
number = "4 suplement",
pages = "S233-S234",
url = "https://hdl.handle.net/21.15107/rcub_farfar_4511"
}
Erceg, S., Tomašević, R., Ninić, A., Pavlović, A., Guzonjić, A., Vujčić, S., Mamić, M., Mitrović, B., Gluvić, Z.,& Kotur-Stevuljević, J.. (2022). Markers of redox status in patients with nonalcoholic fatty liver disease. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije (SFUS)., 72(4 suplement), S233-S234.
https://hdl.handle.net/21.15107/rcub_farfar_4511
Erceg S, Tomašević R, Ninić A, Pavlović A, Guzonjić A, Vujčić S, Mamić M, Mitrović B, Gluvić Z, Kotur-Stevuljević J. Markers of redox status in patients with nonalcoholic fatty liver disease. in Arhiv za farmaciju. 2022;72(4 suplement):S233-S234.
https://hdl.handle.net/21.15107/rcub_farfar_4511 .
Erceg, Sanja, Tomašević, Ratko, Ninić, Ana, Pavlović, Aleksandar, Guzonjić, Azra, Vujčić, Sanja, Mamić, Milica, Mitrović, Bojan, Gluvić, Zoran, Kotur-Stevuljević, Jelena, "Markers of redox status in patients with nonalcoholic fatty liver disease" in Arhiv za farmaciju, 72, no. 4 suplement (2022):S233-S234,
https://hdl.handle.net/21.15107/rcub_farfar_4511 .

The stress stability of olanzapine: studies of interactions with excipients in solid state pharmaceutical formulations

Đorđević-Filijović, Nataša; Antonijević, Milan D.; Pavlović, Aleksandar; Vucković, Ivan M.; Nikolić, Katarina; Agbaba, Danica

(Informa Healthcare, London, 2015)

TY  - JOUR
AU  - Đorđević-Filijović, Nataša
AU  - Antonijević, Milan D.
AU  - Pavlović, Aleksandar
AU  - Vucković, Ivan M.
AU  - Nikolić, Katarina
AU  - Agbaba, Danica
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2415
AB  - Stress stability testing represents an important part of the drug development process. It is used as an important tool for the identification of degradation products and degradation pathways, as well as for the assessment of changes in physical form of drug molecules. The impact of excipients on the stability of olanzapine confirms that levels of impurities and degradants are limiting parameters and are therefore used for stability evaluation. The major degradation product of olanzapine was identified as 2-methyl-5,10-dihydro-4H-thieno[2,3-b][1,5] benzodiazepine-4-one (III). The structure of III was determined by using LC-MS, IR and NMR. Compatibility and stress stability results demonstrated that tablet formulations of olanzapine are sensitive to temperature and moisture. In samples protected from moisture, the increase in concentration of III was shown to be highly temperature dependent and the degradation followed zero-order kinetics. In addition, studies of olanzapine with excipients and in formulated tablets revealed polymorphic phase changes in some samples, influenced by a combination of stress temperature and humidity conditions. Polymorphic transitions were monitored using x-ray powder diffraction (XRPD) analysis and exhibited no correlation between the phase change (appearance of a new polymorph) and the degradation process.
PB  - Informa Healthcare, London
T2  - Drug Development and Industrial Pharmacy
T1  - The stress stability of olanzapine: studies of interactions with excipients in solid state pharmaceutical formulations
VL  - 41
IS  - 3
SP  - 502
EP  - 514
DO  - 10.3109/03639045.2014.884114
ER  - 
@article{
author = "Đorđević-Filijović, Nataša and Antonijević, Milan D. and Pavlović, Aleksandar and Vucković, Ivan M. and Nikolić, Katarina and Agbaba, Danica",
year = "2015",
abstract = "Stress stability testing represents an important part of the drug development process. It is used as an important tool for the identification of degradation products and degradation pathways, as well as for the assessment of changes in physical form of drug molecules. The impact of excipients on the stability of olanzapine confirms that levels of impurities and degradants are limiting parameters and are therefore used for stability evaluation. The major degradation product of olanzapine was identified as 2-methyl-5,10-dihydro-4H-thieno[2,3-b][1,5] benzodiazepine-4-one (III). The structure of III was determined by using LC-MS, IR and NMR. Compatibility and stress stability results demonstrated that tablet formulations of olanzapine are sensitive to temperature and moisture. In samples protected from moisture, the increase in concentration of III was shown to be highly temperature dependent and the degradation followed zero-order kinetics. In addition, studies of olanzapine with excipients and in formulated tablets revealed polymorphic phase changes in some samples, influenced by a combination of stress temperature and humidity conditions. Polymorphic transitions were monitored using x-ray powder diffraction (XRPD) analysis and exhibited no correlation between the phase change (appearance of a new polymorph) and the degradation process.",
publisher = "Informa Healthcare, London",
journal = "Drug Development and Industrial Pharmacy",
title = "The stress stability of olanzapine: studies of interactions with excipients in solid state pharmaceutical formulations",
volume = "41",
number = "3",
pages = "502-514",
doi = "10.3109/03639045.2014.884114"
}
Đorđević-Filijović, N., Antonijević, M. D., Pavlović, A., Vucković, I. M., Nikolić, K.,& Agbaba, D.. (2015). The stress stability of olanzapine: studies of interactions with excipients in solid state pharmaceutical formulations. in Drug Development and Industrial Pharmacy
Informa Healthcare, London., 41(3), 502-514.
https://doi.org/10.3109/03639045.2014.884114
Đorđević-Filijović N, Antonijević MD, Pavlović A, Vucković IM, Nikolić K, Agbaba D. The stress stability of olanzapine: studies of interactions with excipients in solid state pharmaceutical formulations. in Drug Development and Industrial Pharmacy. 2015;41(3):502-514.
doi:10.3109/03639045.2014.884114 .
Đorđević-Filijović, Nataša, Antonijević, Milan D., Pavlović, Aleksandar, Vucković, Ivan M., Nikolić, Katarina, Agbaba, Danica, "The stress stability of olanzapine: studies of interactions with excipients in solid state pharmaceutical formulations" in Drug Development and Industrial Pharmacy, 41, no. 3 (2015):502-514,
https://doi.org/10.3109/03639045.2014.884114 . .
8
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Validation of an HPLC method for determination of aripiprazole and its impurities in pharmaceuticals

Đorđević-Filijović, Nataša; Pavlović, Aleksandar; Nikolić, Katarina; Agbaba, Danica

(Akademiai Kiado Rt, Budapest, 2014)

TY  - JOUR
AU  - Đorđević-Filijović, Nataša
AU  - Pavlović, Aleksandar
AU  - Nikolić, Katarina
AU  - Agbaba, Danica
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2152
AB  - Aripiprazole is a novel atypical antipsychotic drug used in the treatment of schizophrenia. The sensitive and reproducible ion pair RPLC method was developed and validated for determination of aripiprazole and its nine impurities, which are significantly different in polarity. The separation was performed on Phenomenex Luna (R) C18 column (5.0 mu m particle size, 250 x 4.6 mm id) using a gradient mobile phase A (phosphate buffer pH 3.0) and mobile phase B (acetonitrile) at the working temperature of 25 degrees C. The buffer was 1.11 g KH2PO4 with 1.2 g sodium pentanesulfonate/L of the solution, adjusted to pH 3.0 with orthophosphoric acid. The flow rate was 1.0 mL/min. The detection was carried out at 215 nm using a diode array detector. The developed method was validated according to the International Conference on Harmonization (ICH) guidelines for specificity, limit of detection, limit of quantification, linearity, precision and robustness. The proposed method is convenient and reliable for the purity control in both raw materials and dosage forms.
PB  - Akademiai Kiado Rt, Budapest
T2  - Acta Chromatographica
T1  - Validation of an HPLC method for determination of aripiprazole and its impurities in pharmaceuticals
VL  - 26
IS  - 1
SP  - 13
EP  - 28
DO  - 10.1556/AChrom.26.2014.1.15
ER  - 
@article{
author = "Đorđević-Filijović, Nataša and Pavlović, Aleksandar and Nikolić, Katarina and Agbaba, Danica",
year = "2014",
abstract = "Aripiprazole is a novel atypical antipsychotic drug used in the treatment of schizophrenia. The sensitive and reproducible ion pair RPLC method was developed and validated for determination of aripiprazole and its nine impurities, which are significantly different in polarity. The separation was performed on Phenomenex Luna (R) C18 column (5.0 mu m particle size, 250 x 4.6 mm id) using a gradient mobile phase A (phosphate buffer pH 3.0) and mobile phase B (acetonitrile) at the working temperature of 25 degrees C. The buffer was 1.11 g KH2PO4 with 1.2 g sodium pentanesulfonate/L of the solution, adjusted to pH 3.0 with orthophosphoric acid. The flow rate was 1.0 mL/min. The detection was carried out at 215 nm using a diode array detector. The developed method was validated according to the International Conference on Harmonization (ICH) guidelines for specificity, limit of detection, limit of quantification, linearity, precision and robustness. The proposed method is convenient and reliable for the purity control in both raw materials and dosage forms.",
publisher = "Akademiai Kiado Rt, Budapest",
journal = "Acta Chromatographica",
title = "Validation of an HPLC method for determination of aripiprazole and its impurities in pharmaceuticals",
volume = "26",
number = "1",
pages = "13-28",
doi = "10.1556/AChrom.26.2014.1.15"
}
Đorđević-Filijović, N., Pavlović, A., Nikolić, K.,& Agbaba, D.. (2014). Validation of an HPLC method for determination of aripiprazole and its impurities in pharmaceuticals. in Acta Chromatographica
Akademiai Kiado Rt, Budapest., 26(1), 13-28.
https://doi.org/10.1556/AChrom.26.2014.1.15
Đorđević-Filijović N, Pavlović A, Nikolić K, Agbaba D. Validation of an HPLC method for determination of aripiprazole and its impurities in pharmaceuticals. in Acta Chromatographica. 2014;26(1):13-28.
doi:10.1556/AChrom.26.2014.1.15 .
Đorđević-Filijović, Nataša, Pavlović, Aleksandar, Nikolić, Katarina, Agbaba, Danica, "Validation of an HPLC method for determination of aripiprazole and its impurities in pharmaceuticals" in Acta Chromatographica, 26, no. 1 (2014):13-28,
https://doi.org/10.1556/AChrom.26.2014.1.15 . .
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