Gagić, Žarko

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orcid::0000-0001-9657-3150
  • Gagić, Žarko (13)
  • Gagić, Žarko P. (1)
Projects

Author's Bibliography

Design of experiments and Derringer's desirability function in optimisation and validation of RP-HPLC method for the analysis of enrofloxacin and its impurities

Dokmanović, Jelena; Kasagić-Vujanović, Irena; Gagić, Žarko; Nikolić, Katarina; Čarapić, Marija; Agbaba, Danica

(Akademiai Kiado ZRt., 2023)

TY  - JOUR
AU  - Dokmanović, Jelena
AU  - Kasagić-Vujanović, Irena
AU  - Gagić, Žarko
AU  - Nikolić, Katarina
AU  - Čarapić, Marija
AU  - Agbaba, Danica
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4474
AB  - Using the Design of Experiments methodology (Response-Surface Methodology and Derringer's Desirability Function), a simple, fast and robust RP-HPLC method was developed for the analysis of enrofloxacin (EFC), its impurity A (fluoroquinolonic acid, FQ) and impurity B (ciprofloxacin, CPX). Gradient elution of samples was performed on a Zorbax Eclipse XDB C18 column (150 × 4.6 mm, 3.5 μm) with a mobile phase consisting of 32 mM phosphate buffer pH 3.5-methanol (0 min-19.6% methanol; 15.5 min-19.6% methanol; 29.5 min-80% methanol; 30 min-19.6% methanol; 35 min-19.6% methanol), delivered at a flow rate of 1.5 mL min-1, wavelength of detection 278 nm (for EFX and CFX) and 265 nm for FQ. A good linear response was achieved in the range 15-35 μg mL-1 (EFX) and LOQ-150% for impurities (CFX and FQ). Other validation parameters were also tested: precision, accuracy, sensitivity and robustness. The developed method was shown to be simple, practical and suitable for the analysis of EFC and its impurities (CPX, FQ) in veterinary drugs.
PB  - Akademiai Kiado ZRt.
T2  - Acta Chromatographica
T1  - Design of experiments and Derringer's desirability function in optimisation and validation of RP-HPLC method for the analysis of enrofloxacin and its impurities
DO  - 10.1556/1326.2022.01111
ER  - 
@article{
author = "Dokmanović, Jelena and Kasagić-Vujanović, Irena and Gagić, Žarko and Nikolić, Katarina and Čarapić, Marija and Agbaba, Danica",
year = "2023",
abstract = "Using the Design of Experiments methodology (Response-Surface Methodology and Derringer's Desirability Function), a simple, fast and robust RP-HPLC method was developed for the analysis of enrofloxacin (EFC), its impurity A (fluoroquinolonic acid, FQ) and impurity B (ciprofloxacin, CPX). Gradient elution of samples was performed on a Zorbax Eclipse XDB C18 column (150 × 4.6 mm, 3.5 μm) with a mobile phase consisting of 32 mM phosphate buffer pH 3.5-methanol (0 min-19.6% methanol; 15.5 min-19.6% methanol; 29.5 min-80% methanol; 30 min-19.6% methanol; 35 min-19.6% methanol), delivered at a flow rate of 1.5 mL min-1, wavelength of detection 278 nm (for EFX and CFX) and 265 nm for FQ. A good linear response was achieved in the range 15-35 μg mL-1 (EFX) and LOQ-150% for impurities (CFX and FQ). Other validation parameters were also tested: precision, accuracy, sensitivity and robustness. The developed method was shown to be simple, practical and suitable for the analysis of EFC and its impurities (CPX, FQ) in veterinary drugs.",
publisher = "Akademiai Kiado ZRt.",
journal = "Acta Chromatographica",
title = "Design of experiments and Derringer's desirability function in optimisation and validation of RP-HPLC method for the analysis of enrofloxacin and its impurities",
doi = "10.1556/1326.2022.01111"
}
Dokmanović, J., Kasagić-Vujanović, I., Gagić, Ž., Nikolić, K., Čarapić, M.,& Agbaba, D.. (2023). Design of experiments and Derringer's desirability function in optimisation and validation of RP-HPLC method for the analysis of enrofloxacin and its impurities. in Acta Chromatographica
Akademiai Kiado ZRt...
https://doi.org/10.1556/1326.2022.01111
Dokmanović J, Kasagić-Vujanović I, Gagić Ž, Nikolić K, Čarapić M, Agbaba D. Design of experiments and Derringer's desirability function in optimisation and validation of RP-HPLC method for the analysis of enrofloxacin and its impurities. in Acta Chromatographica. 2023;.
doi:10.1556/1326.2022.01111 .
Dokmanović, Jelena, Kasagić-Vujanović, Irena, Gagić, Žarko, Nikolić, Katarina, Čarapić, Marija, Agbaba, Danica, "Design of experiments and Derringer's desirability function in optimisation and validation of RP-HPLC method for the analysis of enrofloxacin and its impurities" in Acta Chromatographica (2023),
https://doi.org/10.1556/1326.2022.01111 . .

In silico Methods for Design of Kinase Inhibitors as Anticancer Drugs

Gagić, Žarko; Ružić, Dušan; Đoković, Nemanja; Đikić, Teodora; Nikolić, Katarina

(Frontiers Media S.A., 2020)

TY  - JOUR
AU  - Gagić, Žarko
AU  - Ružić, Dušan
AU  - Đoković, Nemanja
AU  - Đikić, Teodora
AU  - Nikolić, Katarina
PY  - 2020
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3502
AB  - Rational drug design implies usage of molecular modeling techniques such as pharmacophore modeling, molecular dynamics, virtual screening, and molecular docking to explain the activity of biomolecules, define molecular determinants for interaction with the drug target, and design more efficient drug candidates. Kinases play an essential role in cell function and therefore are extensively studied targets in drug design and discovery. Kinase inhibitors are clinically very important and widely used antineoplastic drugs. In this review, computational methods used in rational drug design of kinase inhibitors are discussed and compared, considering some representative case studies.
PB  - Frontiers Media S.A.
T2  - Frontiers in Chemistry
T1  - In silico Methods for Design of Kinase Inhibitors as Anticancer Drugs
VL  - 7
DO  - 10.3389/fchem.2019.00873
ER  - 
@article{
author = "Gagić, Žarko and Ružić, Dušan and Đoković, Nemanja and Đikić, Teodora and Nikolić, Katarina",
year = "2020",
abstract = "Rational drug design implies usage of molecular modeling techniques such as pharmacophore modeling, molecular dynamics, virtual screening, and molecular docking to explain the activity of biomolecules, define molecular determinants for interaction with the drug target, and design more efficient drug candidates. Kinases play an essential role in cell function and therefore are extensively studied targets in drug design and discovery. Kinase inhibitors are clinically very important and widely used antineoplastic drugs. In this review, computational methods used in rational drug design of kinase inhibitors are discussed and compared, considering some representative case studies.",
publisher = "Frontiers Media S.A.",
journal = "Frontiers in Chemistry",
title = "In silico Methods for Design of Kinase Inhibitors as Anticancer Drugs",
volume = "7",
doi = "10.3389/fchem.2019.00873"
}
Gagić, Ž., Ružić, D., Đoković, N., Đikić, T.,& Nikolić, K.. (2020). In silico Methods for Design of Kinase Inhibitors as Anticancer Drugs. in Frontiers in Chemistry
Frontiers Media S.A.., 7.
https://doi.org/10.3389/fchem.2019.00873
Gagić Ž, Ružić D, Đoković N, Đikić T, Nikolić K. In silico Methods for Design of Kinase Inhibitors as Anticancer Drugs. in Frontiers in Chemistry. 2020;7.
doi:10.3389/fchem.2019.00873 .
Gagić, Žarko, Ružić, Dušan, Đoković, Nemanja, Đikić, Teodora, Nikolić, Katarina, "In silico Methods for Design of Kinase Inhibitors as Anticancer Drugs" in Frontiers in Chemistry, 7 (2020),
https://doi.org/10.3389/fchem.2019.00873 . .
16
72
22
61

Rational design of multi-target compounds with potential anticancer activity

Dobričić, Vladimir; Oluić, Jelena; Nikolić, Katarina; Vučićević, Jelica; Gagić, Žarko; Filipić, Slavica; Agbaba, Danica; Čudina, Olivera

(COST Action 17104 (STRATAGEM), 2019)

TY  - CONF
AU  - Dobričić, Vladimir
AU  - Oluić, Jelena
AU  - Nikolić, Katarina
AU  - Vučićević, Jelica
AU  - Gagić, Žarko
AU  - Filipić, Slavica
AU  - Agbaba, Danica
AU  - Čudina, Olivera
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5473
AB  - Multi-target compounds are designed to act on at least two targets in synergistic way, in order to produce stronger biological effect. The link
between cancer and inflammation has been intensively studied in last years and inhibition of both COX-2 and 5-LOX enzymes may be an
effective therapeutic approach for colon cancer treatment [1]. Acridines are known as DNA-topoisomerase II inhibitors. These compounds
intercalate into the DNA and inhibit topoisomerase II by their side chain. Recent studies showed additional activities of acridine derivatives,
depending on the side chain structure, such as inhibition of Src, MEK and VEGFR2 kinases [2,3]. Altered activity of PI3K/mTOR signaling pathway
is one of the most common aberrations found in various forms of neoplastic lesions. Dual inhibition of PI3K and mTOR represents a reasonably
attractive concept in potential cancer treatment [4]. In this paper, design of three groups of multi-target compounds with potential anticancer
activity is presented. Designed compounds are potential inhibitors of COX-2 and 5-LOX, DNA-topoisomerase II complex and kinases (Src, MEK
and VEGFR2), as well as dual inhibitors of mTOR and PI3K. A set of 27 compounds with published inhibitory activity on COX-2 and 5-LOX was
formed and two QSAR models, for both activities, were created in Pentacle program. On the basis of models’ interpretation, nine new
compounds were designed and activity on both targets predicted by developed models. Twenty-three acridine derivatives were designed and
their interactions with DNA-topoisomerase II complex, Src, MEK and VEGFR2 were tested using AutoDock Vina program. Nineteen designed
compounds bind to DNA similarly to inhibitor amsacrine and among them, ten derivatives show key binding interactions with tested kinases and
therefore possess potential to inhibit them. A dataset of eighty-five compounds with dual PI3K/mTOR inhibitory activities was formed,
divided into two groups based on their structural analogy and 3D-QSAR analysis of each group was performed in Pentacle program,
9
resulting in four QSAR models. On the basis of these results, new compounds were designed and further evaluated by use of molecular
docking, virtual screening and ADMET predictions. Finally, seven compounds were chosen as the most promising new dual mTOR/PI3K inhibitors.
PB  - COST Action 17104 (STRATAGEM)
C3  - STRATAGEM CA17104, New Diagnostic and Therapeutic Tools against Multidrug-Resistant Tumors, first Working-Group Meeting, WG1 - WG4, 30 - 31. January 2019, Turin, Italy
T1  - Rational design of multi-target compounds with potential anticancer activity
SP  - 8
EP  - 9
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5473
ER  - 
@conference{
author = "Dobričić, Vladimir and Oluić, Jelena and Nikolić, Katarina and Vučićević, Jelica and Gagić, Žarko and Filipić, Slavica and Agbaba, Danica and Čudina, Olivera",
year = "2019",
abstract = "Multi-target compounds are designed to act on at least two targets in synergistic way, in order to produce stronger biological effect. The link
between cancer and inflammation has been intensively studied in last years and inhibition of both COX-2 and 5-LOX enzymes may be an
effective therapeutic approach for colon cancer treatment [1]. Acridines are known as DNA-topoisomerase II inhibitors. These compounds
intercalate into the DNA and inhibit topoisomerase II by their side chain. Recent studies showed additional activities of acridine derivatives,
depending on the side chain structure, such as inhibition of Src, MEK and VEGFR2 kinases [2,3]. Altered activity of PI3K/mTOR signaling pathway
is one of the most common aberrations found in various forms of neoplastic lesions. Dual inhibition of PI3K and mTOR represents a reasonably
attractive concept in potential cancer treatment [4]. In this paper, design of three groups of multi-target compounds with potential anticancer
activity is presented. Designed compounds are potential inhibitors of COX-2 and 5-LOX, DNA-topoisomerase II complex and kinases (Src, MEK
and VEGFR2), as well as dual inhibitors of mTOR and PI3K. A set of 27 compounds with published inhibitory activity on COX-2 and 5-LOX was
formed and two QSAR models, for both activities, were created in Pentacle program. On the basis of models’ interpretation, nine new
compounds were designed and activity on both targets predicted by developed models. Twenty-three acridine derivatives were designed and
their interactions with DNA-topoisomerase II complex, Src, MEK and VEGFR2 were tested using AutoDock Vina program. Nineteen designed
compounds bind to DNA similarly to inhibitor amsacrine and among them, ten derivatives show key binding interactions with tested kinases and
therefore possess potential to inhibit them. A dataset of eighty-five compounds with dual PI3K/mTOR inhibitory activities was formed,
divided into two groups based on their structural analogy and 3D-QSAR analysis of each group was performed in Pentacle program,
9
resulting in four QSAR models. On the basis of these results, new compounds were designed and further evaluated by use of molecular
docking, virtual screening and ADMET predictions. Finally, seven compounds were chosen as the most promising new dual mTOR/PI3K inhibitors.",
publisher = "COST Action 17104 (STRATAGEM)",
journal = "STRATAGEM CA17104, New Diagnostic and Therapeutic Tools against Multidrug-Resistant Tumors, first Working-Group Meeting, WG1 - WG4, 30 - 31. January 2019, Turin, Italy",
title = "Rational design of multi-target compounds with potential anticancer activity",
pages = "8-9",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5473"
}
Dobričić, V., Oluić, J., Nikolić, K., Vučićević, J., Gagić, Ž., Filipić, S., Agbaba, D.,& Čudina, O.. (2019). Rational design of multi-target compounds with potential anticancer activity. in STRATAGEM CA17104, New Diagnostic and Therapeutic Tools against Multidrug-Resistant Tumors, first Working-Group Meeting, WG1 - WG4, 30 - 31. January 2019, Turin, Italy
COST Action 17104 (STRATAGEM)., 8-9.
https://hdl.handle.net/21.15107/rcub_farfar_5473
Dobričić V, Oluić J, Nikolić K, Vučićević J, Gagić Ž, Filipić S, Agbaba D, Čudina O. Rational design of multi-target compounds with potential anticancer activity. in STRATAGEM CA17104, New Diagnostic and Therapeutic Tools against Multidrug-Resistant Tumors, first Working-Group Meeting, WG1 - WG4, 30 - 31. January 2019, Turin, Italy. 2019;:8-9.
https://hdl.handle.net/21.15107/rcub_farfar_5473 .
Dobričić, Vladimir, Oluić, Jelena, Nikolić, Katarina, Vučićević, Jelica, Gagić, Žarko, Filipić, Slavica, Agbaba, Danica, Čudina, Olivera, "Rational design of multi-target compounds with potential anticancer activity" in STRATAGEM CA17104, New Diagnostic and Therapeutic Tools against Multidrug-Resistant Tumors, first Working-Group Meeting, WG1 - WG4, 30 - 31. January 2019, Turin, Italy (2019):8-9,
https://hdl.handle.net/21.15107/rcub_farfar_5473 .

3D-QSAR studies and design of selective PI3K-α kinase inhibitors as potential antineoplastics

Jovanović, Milan; Gagić, Žarko; Nikolić, Katarina

(Serbian Chemical Society, 2019)

TY  - CONF
AU  - Jovanović, Milan
AU  - Gagić, Žarko
AU  - Nikolić, Katarina
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4852
PB  - Serbian Chemical Society
PB  - Serbian Young Chemists Club
C3  - Seventh Conference of the Young Chemists of Serbia, Book of Abstracts, 2nd November 2019, Belgrade
T1  - 3D-QSAR studies and design of selective PI3K-α kinase inhibitors as potential antineoplastics
SP  - 125
EP  - 125
UR  - https://hdl.handle.net/21.15107/rcub_farfar_4852
ER  - 
@conference{
author = "Jovanović, Milan and Gagić, Žarko and Nikolić, Katarina",
year = "2019",
publisher = "Serbian Chemical Society, Serbian Young Chemists Club",
journal = "Seventh Conference of the Young Chemists of Serbia, Book of Abstracts, 2nd November 2019, Belgrade",
title = "3D-QSAR studies and design of selective PI3K-α kinase inhibitors as potential antineoplastics",
pages = "125-125",
url = "https://hdl.handle.net/21.15107/rcub_farfar_4852"
}
Jovanović, M., Gagić, Ž.,& Nikolić, K.. (2019). 3D-QSAR studies and design of selective PI3K-α kinase inhibitors as potential antineoplastics. in Seventh Conference of the Young Chemists of Serbia, Book of Abstracts, 2nd November 2019, Belgrade
Serbian Chemical Society., 125-125.
https://hdl.handle.net/21.15107/rcub_farfar_4852
Jovanović M, Gagić Ž, Nikolić K. 3D-QSAR studies and design of selective PI3K-α kinase inhibitors as potential antineoplastics. in Seventh Conference of the Young Chemists of Serbia, Book of Abstracts, 2nd November 2019, Belgrade. 2019;:125-125.
https://hdl.handle.net/21.15107/rcub_farfar_4852 .
Jovanović, Milan, Gagić, Žarko, Nikolić, Katarina, "3D-QSAR studies and design of selective PI3K-α kinase inhibitors as potential antineoplastics" in Seventh Conference of the Young Chemists of Serbia, Book of Abstracts, 2nd November 2019, Belgrade (2019):125-125,
https://hdl.handle.net/21.15107/rcub_farfar_4852 .

Određivanje strukture farmakofore, dizajn, sinteza i ispitivanje antiproliferativne aktivnosti derivata alfa-tokoferola i gama-tokotrienola

Gagić, Žarko P.

(Универзитет у Београду, Фармацеутски факултет, 2018)

TY  - THES
AU  - Gagić, Žarko P.
PY  - 2018
UR  - http://nardus.mpn.gov.rs/handle/123456789/9555
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=5848
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:17751/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=2048262242
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3671
AB  - Vitamin E je generičko ime koje obuhvata dve klase jedinjenja, tokoferole i tokotrienole, od kojih svaka klasa sadrži 4 izomera (α, β, γ, δ). Analozi vitamina E putem različitih mehanizama mogu ispoljiti snažnu citotoksičnu aktivnost na više tipova tumorskih ćelija, a da pritom ne remete u velikoj meri aktivnost zdravih ćelija.Ovu doktorsku disertaciju čine tri celine čiji će rezultati imati potencijalni značaj za primenu derivata vitamina E u terapiji malignih bolesti.Prva celina obuhvata studije kvantitativnog odnosa strukture i dejstva (Quantitative Structure-Activity Relationship, QSAR) derivata vitamina E i određivanje strukture farmakofore.U drugoj celini opisani su: (1) sinteza estara α-tokoferola sa aminokiselinama lizinom, prolinom, glutaminom, asparaginom i estara γ-tokotrienola sa lizinom, prolinom, glutaminom; (2) in vitro ispitivanja biološke aktivnosti sintetisanih estara na MCF-7 i MDA-MB 231 ćelijskim linijama tumora dojke, A549 ćelijskoj liniji tumora pluća i MRC-5 zdravoj ćelijskoj liniji fetalnih fibroblasta pluća; (3) ispitivanje ćelijskih mehanizama antiproliferativne aktivnosti i sinergističkog efekta najaktivnijeg sinetisanog jedinjenja sa doksorubicinom na multirezistentnoj MDA-MB 231 ćelijskoj liniji; (4) studije stabilnosti u humanoj plazmi; (5) pretraživanje ChEMBL baze bioaktivnih molekula primenom metode virtelnog skrininga zasnovanog na strukturi liganda.Treću celinu predstavlja dizajn novih analoga vitamina E sa potencijalno snažnijim antitumorskim dejstvom...
AB  - Vitamin E is a generic name comprising of two classes of compounds, tocopherols and tocotrienols, each class containing 4 isomers (α, β, γ, δ). Analogs of vitamin E, via different mechanisms, may exhibit strong cytotoxic activity to many types of malignant cells, while not disrupting in a greater extent activity of healthy cells.This doctoral thesis includes three sections whose results will have potential importance for the use of vitamin E derivatives in the treatment of malignant diseases.The first section includes Quantitative Structure-Activity Relationship (QSAR) study of vitamin E analogues and pharmacophore structure determination.The second section covers: (1) synthesis of α-tocopherol esters with amino acids lysine, proline, glutamine, asparagine, and γ-tocotrienol esters with lysine, proline, glutamine; (2) in vitro testing of biological activities of the synthesized esters on the MCF-7 and MDA-MB 231 breast cancer cell lines, A549 lung cancer cell line, and the MRC-5 healthy fetal lung fibroblasts cell line; (3) testing of cellular mechanisms which underlie the antiproliferative activity and synergistic effect of the most active compound with doxorubicin on multidrug-resistant MDA-MB 231 cell line; (4) stability study in human plasma; (5) filtering of the ChEMBL database of bioactive molecules using the ligand based virtual screening protocol.The third section represents design of new analogues of vitamin E with enhanced antitumor activity.2D- and 3D-QSAR studies were conducted on a series of vitamin E analogues with experimentally determined antiproliferative activity on MCF7 cell line, using PLSstatistical method...
PB  - Универзитет у Београду, Фармацеутски факултет
T2  - Универзитет у Београду
T1  - Određivanje strukture farmakofore, dizajn, sinteza i ispitivanje antiproliferativne aktivnosti derivata alfa-tokoferola i gama-tokotrienola
UR  - https://hdl.handle.net/21.15107/rcub_nardus_9555
ER  - 
@phdthesis{
author = "Gagić, Žarko P.",
year = "2018",
abstract = "Vitamin E je generičko ime koje obuhvata dve klase jedinjenja, tokoferole i tokotrienole, od kojih svaka klasa sadrži 4 izomera (α, β, γ, δ). Analozi vitamina E putem različitih mehanizama mogu ispoljiti snažnu citotoksičnu aktivnost na više tipova tumorskih ćelija, a da pritom ne remete u velikoj meri aktivnost zdravih ćelija.Ovu doktorsku disertaciju čine tri celine čiji će rezultati imati potencijalni značaj za primenu derivata vitamina E u terapiji malignih bolesti.Prva celina obuhvata studije kvantitativnog odnosa strukture i dejstva (Quantitative Structure-Activity Relationship, QSAR) derivata vitamina E i određivanje strukture farmakofore.U drugoj celini opisani su: (1) sinteza estara α-tokoferola sa aminokiselinama lizinom, prolinom, glutaminom, asparaginom i estara γ-tokotrienola sa lizinom, prolinom, glutaminom; (2) in vitro ispitivanja biološke aktivnosti sintetisanih estara na MCF-7 i MDA-MB 231 ćelijskim linijama tumora dojke, A549 ćelijskoj liniji tumora pluća i MRC-5 zdravoj ćelijskoj liniji fetalnih fibroblasta pluća; (3) ispitivanje ćelijskih mehanizama antiproliferativne aktivnosti i sinergističkog efekta najaktivnijeg sinetisanog jedinjenja sa doksorubicinom na multirezistentnoj MDA-MB 231 ćelijskoj liniji; (4) studije stabilnosti u humanoj plazmi; (5) pretraživanje ChEMBL baze bioaktivnih molekula primenom metode virtelnog skrininga zasnovanog na strukturi liganda.Treću celinu predstavlja dizajn novih analoga vitamina E sa potencijalno snažnijim antitumorskim dejstvom..., Vitamin E is a generic name comprising of two classes of compounds, tocopherols and tocotrienols, each class containing 4 isomers (α, β, γ, δ). Analogs of vitamin E, via different mechanisms, may exhibit strong cytotoxic activity to many types of malignant cells, while not disrupting in a greater extent activity of healthy cells.This doctoral thesis includes three sections whose results will have potential importance for the use of vitamin E derivatives in the treatment of malignant diseases.The first section includes Quantitative Structure-Activity Relationship (QSAR) study of vitamin E analogues and pharmacophore structure determination.The second section covers: (1) synthesis of α-tocopherol esters with amino acids lysine, proline, glutamine, asparagine, and γ-tocotrienol esters with lysine, proline, glutamine; (2) in vitro testing of biological activities of the synthesized esters on the MCF-7 and MDA-MB 231 breast cancer cell lines, A549 lung cancer cell line, and the MRC-5 healthy fetal lung fibroblasts cell line; (3) testing of cellular mechanisms which underlie the antiproliferative activity and synergistic effect of the most active compound with doxorubicin on multidrug-resistant MDA-MB 231 cell line; (4) stability study in human plasma; (5) filtering of the ChEMBL database of bioactive molecules using the ligand based virtual screening protocol.The third section represents design of new analogues of vitamin E with enhanced antitumor activity.2D- and 3D-QSAR studies were conducted on a series of vitamin E analogues with experimentally determined antiproliferative activity on MCF7 cell line, using PLSstatistical method...",
publisher = "Универзитет у Београду, Фармацеутски факултет",
journal = "Универзитет у Београду",
title = "Određivanje strukture farmakofore, dizajn, sinteza i ispitivanje antiproliferativne aktivnosti derivata alfa-tokoferola i gama-tokotrienola",
url = "https://hdl.handle.net/21.15107/rcub_nardus_9555"
}
Gagić, Ž. P.. (2018). Određivanje strukture farmakofore, dizajn, sinteza i ispitivanje antiproliferativne aktivnosti derivata alfa-tokoferola i gama-tokotrienola. in Универзитет у Београду
Универзитет у Београду, Фармацеутски факултет..
https://hdl.handle.net/21.15107/rcub_nardus_9555
Gagić ŽP. Određivanje strukture farmakofore, dizajn, sinteza i ispitivanje antiproliferativne aktivnosti derivata alfa-tokoferola i gama-tokotrienola. in Универзитет у Београду. 2018;.
https://hdl.handle.net/21.15107/rcub_nardus_9555 .
Gagić, Žarko P., "Određivanje strukture farmakofore, dizajn, sinteza i ispitivanje antiproliferativne aktivnosti derivata alfa-tokoferola i gama-tokotrienola" in Универзитет у Београду (2018),
https://hdl.handle.net/21.15107/rcub_nardus_9555 .

Ispitivanje citotoksične aktivnosti aminokiselinskih estara vitamina E na ćelijama tumora dojke i pluća

Gagić, Žarko; Srdić-Rajić, Tatjana; Nikolić, Katarina; Agbaba, Danica

(Savez farmaceutskih udruženja Srbije (SFUS), 2018)

TY  - CONF
AU  - Gagić, Žarko
AU  - Srdić-Rajić, Tatjana
AU  - Nikolić, Katarina
AU  - Agbaba, Danica
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4877
AB  - U velikom broju studija pokazana je antitumorska aktivnost prirodnih izomera
vitamina E, a naročito njihovih polusintetskih derivata. Cilj ove studije je bio ispitivanje
citotoksične aktivnosti estara α‐tokoferola sa aminokiselinama lizinom, prolinom,
glutaminom, asparaginom i estara γ‐tokotrienola sa lizinom, prolinom i glutaminom na
MCF7 i MDA‐MB 231 ćelijskim linijama tumora dojke i A549 ćelijskoj liniji tumora
pluća. Sve ćelijske linije tretirane su koncentracijama ispitivanih jedinjenja u opsegu
0,62‐50 μM u toku 48 sati. Preživljavanje ćelija nakon tretmana ispitivanim
jedinjenjima je određeno MTT‐testom. Najveći uticaj na preživljavanje malignih ćelija
su imali α‐tokoferil lizin, α‐tokoferil asparagin u formi nitrila i γ‐tokotrienil lizin. α‐
Tokoferil lizin je ispoljio snažnu antitumorsku aktivnost na A549 (IC50=10,6 μM) i MCF7
(IC50=8,6 μM) ćelijama, dok je γ‐tokotrienil lizin je jedini od ispitivanih jedinjenja koji je
ispoljio aktivnost na sve tri maligne ćelijske linije, sa IC50 vrednostima 20,6 μM (MCF7),
28,6 μM (MDA‐MB‐231) i 19 μM (A549). Asparaginski estar α‐tokoferola u formi nitrila
je je doveo do snažne inhibicije preživljavanja MDA‐MB‐231 ćelija (IC50=9,2 μM) koje se
odlikuju višestrukom rezistencijom na lekove koji se koriste u terapiji tumora dojke.
Ispitivana jedinjenja nisu ispoljila toksičnost ka MRC‐5 zdravoj ćelijskoj liniji fetalnih
fibroblasta pluća.
Zahvaljujući pokazanoj in vitro citotoksičnoj aktivnosti i selektivnosti za maligne
ćelije, aminokiselinski estri α‐tokoferola i γ‐tokotrienola predstavljaju dobre kandidate
za buduća in vivo ispitivanja.
AB  - In recent studies, the antitumor activity of vitamin E derivatives has been
demonstrated. The aim of this study was to investigate the cytotoxic activity of α‐
tocopherol esters with amino acids lysine, proline, glutamine, asparagine and γ‐
tocotrienol esters with lysine, proline and glutamine on MCF7 and MDA‐MB 231 breast
cancer cell lines and A549 lung cancer cell line. All cell lines were treated with
concentrations of the test compounds in the range of 0.62‐50 μM for 48 hours. Cell
survival after treatment with the investigated compounds was determined by MTT test.
The greatest influence on the survival of malignant cells was observed with α‐
tocopheryl lysine, α‐tocopheryl asparagine in the form of nitrile and γ‐tocotrienyl
lysine. α‐Tocopheryl lysine exhibited strong cytotoxic activity on A549 (IC50 = 10.6 μM)
and MCF7 (IC50 = 8.6 μM) cells, while γ‐tocotrienyl lysine is the only compound that
exhibited activity on all three cancer cell lines, with IC50 values of 20.6 μM (MCF7),
28.6μM (MDA‐MB‐231) and 19 μM (A549). The α‐tocopheryl asparagine nitrile led to a
strong inhibition of the survival of MDA‐MB‐231 cells (IC50 =9.2 μM) that are
characterized by multiple resistance to drugs used for treatment of breast cancer. All
investigated compounds did not exhibit toxicity to normal MRC‐5 cell line of the fetal
fibroblasts of the lungs.
Based on the shown in vitro cytotoxic activity and selectivity for tumor cells, α‐
tocopherol and γ‐tocotrienol amino acid esters represent promising candidates for
future in vivo studies.
PB  - Savez farmaceutskih udruženja Srbije (SFUS)
C3  - Arhiv za farmaciju
T1  - Ispitivanje citotoksične aktivnosti aminokiselinskih estara vitamina E na ćelijama tumora dojke i pluća
T1  - Cytotoxic activity of amino acid esters of vitamin E against breast and lung cancer cell lines
VL  - 68
IS  - 3
SP  - 391
EP  - 392
UR  - https://hdl.handle.net/21.15107/rcub_farfar_4877
ER  - 
@conference{
author = "Gagić, Žarko and Srdić-Rajić, Tatjana and Nikolić, Katarina and Agbaba, Danica",
year = "2018",
abstract = "U velikom broju studija pokazana je antitumorska aktivnost prirodnih izomera
vitamina E, a naročito njihovih polusintetskih derivata. Cilj ove studije je bio ispitivanje
citotoksične aktivnosti estara α‐tokoferola sa aminokiselinama lizinom, prolinom,
glutaminom, asparaginom i estara γ‐tokotrienola sa lizinom, prolinom i glutaminom na
MCF7 i MDA‐MB 231 ćelijskim linijama tumora dojke i A549 ćelijskoj liniji tumora
pluća. Sve ćelijske linije tretirane su koncentracijama ispitivanih jedinjenja u opsegu
0,62‐50 μM u toku 48 sati. Preživljavanje ćelija nakon tretmana ispitivanim
jedinjenjima je određeno MTT‐testom. Najveći uticaj na preživljavanje malignih ćelija
su imali α‐tokoferil lizin, α‐tokoferil asparagin u formi nitrila i γ‐tokotrienil lizin. α‐
Tokoferil lizin je ispoljio snažnu antitumorsku aktivnost na A549 (IC50=10,6 μM) i MCF7
(IC50=8,6 μM) ćelijama, dok je γ‐tokotrienil lizin je jedini od ispitivanih jedinjenja koji je
ispoljio aktivnost na sve tri maligne ćelijske linije, sa IC50 vrednostima 20,6 μM (MCF7),
28,6 μM (MDA‐MB‐231) i 19 μM (A549). Asparaginski estar α‐tokoferola u formi nitrila
je je doveo do snažne inhibicije preživljavanja MDA‐MB‐231 ćelija (IC50=9,2 μM) koje se
odlikuju višestrukom rezistencijom na lekove koji se koriste u terapiji tumora dojke.
Ispitivana jedinjenja nisu ispoljila toksičnost ka MRC‐5 zdravoj ćelijskoj liniji fetalnih
fibroblasta pluća.
Zahvaljujući pokazanoj in vitro citotoksičnoj aktivnosti i selektivnosti za maligne
ćelije, aminokiselinski estri α‐tokoferola i γ‐tokotrienola predstavljaju dobre kandidate
za buduća in vivo ispitivanja., In recent studies, the antitumor activity of vitamin E derivatives has been
demonstrated. The aim of this study was to investigate the cytotoxic activity of α‐
tocopherol esters with amino acids lysine, proline, glutamine, asparagine and γ‐
tocotrienol esters with lysine, proline and glutamine on MCF7 and MDA‐MB 231 breast
cancer cell lines and A549 lung cancer cell line. All cell lines were treated with
concentrations of the test compounds in the range of 0.62‐50 μM for 48 hours. Cell
survival after treatment with the investigated compounds was determined by MTT test.
The greatest influence on the survival of malignant cells was observed with α‐
tocopheryl lysine, α‐tocopheryl asparagine in the form of nitrile and γ‐tocotrienyl
lysine. α‐Tocopheryl lysine exhibited strong cytotoxic activity on A549 (IC50 = 10.6 μM)
and MCF7 (IC50 = 8.6 μM) cells, while γ‐tocotrienyl lysine is the only compound that
exhibited activity on all three cancer cell lines, with IC50 values of 20.6 μM (MCF7),
28.6μM (MDA‐MB‐231) and 19 μM (A549). The α‐tocopheryl asparagine nitrile led to a
strong inhibition of the survival of MDA‐MB‐231 cells (IC50 =9.2 μM) that are
characterized by multiple resistance to drugs used for treatment of breast cancer. All
investigated compounds did not exhibit toxicity to normal MRC‐5 cell line of the fetal
fibroblasts of the lungs.
Based on the shown in vitro cytotoxic activity and selectivity for tumor cells, α‐
tocopherol and γ‐tocotrienol amino acid esters represent promising candidates for
future in vivo studies.",
publisher = "Savez farmaceutskih udruženja Srbije (SFUS)",
journal = "Arhiv za farmaciju",
title = "Ispitivanje citotoksične aktivnosti aminokiselinskih estara vitamina E na ćelijama tumora dojke i pluća, Cytotoxic activity of amino acid esters of vitamin E against breast and lung cancer cell lines",
volume = "68",
number = "3",
pages = "391-392",
url = "https://hdl.handle.net/21.15107/rcub_farfar_4877"
}
Gagić, Ž., Srdić-Rajić, T., Nikolić, K.,& Agbaba, D.. (2018). Ispitivanje citotoksične aktivnosti aminokiselinskih estara vitamina E na ćelijama tumora dojke i pluća. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije (SFUS)., 68(3), 391-392.
https://hdl.handle.net/21.15107/rcub_farfar_4877
Gagić Ž, Srdić-Rajić T, Nikolić K, Agbaba D. Ispitivanje citotoksične aktivnosti aminokiselinskih estara vitamina E na ćelijama tumora dojke i pluća. in Arhiv za farmaciju. 2018;68(3):391-392.
https://hdl.handle.net/21.15107/rcub_farfar_4877 .
Gagić, Žarko, Srdić-Rajić, Tatjana, Nikolić, Katarina, Agbaba, Danica, "Ispitivanje citotoksične aktivnosti aminokiselinskih estara vitamina E na ćelijama tumora dojke i pluća" in Arhiv za farmaciju, 68, no. 3 (2018):391-392,
https://hdl.handle.net/21.15107/rcub_farfar_4877 .

3D molecular pharmacophore determination of PI3K-α kinase inhibitors

Gagić, Žarko; Jovanović, Milan; Agbaba, Danica; Nikolić, Katarina

(Society of Physical Chemists of Serbia, 2018)

TY  - CONF
AU  - Gagić, Žarko
AU  - Jovanović, Milan
AU  - Agbaba, Danica
AU  - Nikolić, Katarina
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4851
AB  - PI3K-α, as an enzyme with increased activity in many types of cancer,
represents important target for research of new cytostatic agents. 3D-QSAR
study was applied on 92 PI3K-α inhibitors in order to determine molecular
pharmacophore structure. Obtained validation parameters (R2=0.84; Q2=0.67,
R2
pred=0.681) indicate on reliability and good predictive potential of the 3DQSAR
model. Pharmacophore analysis showed that following structural
characteristic have the greatest impact on activity of PI3K-α inhibitors:
presence of hydrogen bond donor and hydrogen bond acceptor at a distance
of 18-18.4Å or 12-12.4Å, presence of hydrophobic domain and hydrogen
bond donor at a distance of 15.2-15.6Å, presence of steric hot spot and
hydrogen bond donor at a distance of 1.6-2Å and presence of hydrogen bond
acceptor and steric hot spot at a distance of 14.4-14.8Å. These findings
provide guidelines for future design of new PI3K-α inhibitors with enhanced
activity.
PB  - Society of Physical Chemists of Serbia
C3  - Physical Chemistry 2018 (Proceedings) 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - 3D molecular pharmacophore determination of PI3K-α kinase inhibitors
VL  - I
SP  - 97
EP  - 100
UR  - https://hdl.handle.net/21.15107/rcub_farfar_4851
ER  - 
@conference{
author = "Gagić, Žarko and Jovanović, Milan and Agbaba, Danica and Nikolić, Katarina",
year = "2018",
abstract = "PI3K-α, as an enzyme with increased activity in many types of cancer,
represents important target for research of new cytostatic agents. 3D-QSAR
study was applied on 92 PI3K-α inhibitors in order to determine molecular
pharmacophore structure. Obtained validation parameters (R2=0.84; Q2=0.67,
R2
pred=0.681) indicate on reliability and good predictive potential of the 3DQSAR
model. Pharmacophore analysis showed that following structural
characteristic have the greatest impact on activity of PI3K-α inhibitors:
presence of hydrogen bond donor and hydrogen bond acceptor at a distance
of 18-18.4Å or 12-12.4Å, presence of hydrophobic domain and hydrogen
bond donor at a distance of 15.2-15.6Å, presence of steric hot spot and
hydrogen bond donor at a distance of 1.6-2Å and presence of hydrogen bond
acceptor and steric hot spot at a distance of 14.4-14.8Å. These findings
provide guidelines for future design of new PI3K-α inhibitors with enhanced
activity.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical Chemistry 2018 (Proceedings) 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "3D molecular pharmacophore determination of PI3K-α kinase inhibitors",
volume = "I",
pages = "97-100",
url = "https://hdl.handle.net/21.15107/rcub_farfar_4851"
}
Gagić, Ž., Jovanović, M., Agbaba, D.,& Nikolić, K.. (2018). 3D molecular pharmacophore determination of PI3K-α kinase inhibitors. in Physical Chemistry 2018 (Proceedings) 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., I, 97-100.
https://hdl.handle.net/21.15107/rcub_farfar_4851
Gagić Ž, Jovanović M, Agbaba D, Nikolić K. 3D molecular pharmacophore determination of PI3K-α kinase inhibitors. in Physical Chemistry 2018 (Proceedings) 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2018;I:97-100.
https://hdl.handle.net/21.15107/rcub_farfar_4851 .
Gagić, Žarko, Jovanović, Milan, Agbaba, Danica, Nikolić, Katarina, "3D molecular pharmacophore determination of PI3K-α kinase inhibitors" in Physical Chemistry 2018 (Proceedings) 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, I (2018):97-100,
https://hdl.handle.net/21.15107/rcub_farfar_4851 .

Molecular modeling and analysis of the 3D pharmacophore structure of the selective PI3K-α inhibitors as antitumor agents

Jovanović, Milan; Nikolić, Katarina; Gagić, Žarko; Agbaba, Danica

(Savez farmaceutskih udruženja Srbije, Beograd, 2018)

TY  - JOUR
AU  - Jovanović, Milan
AU  - Nikolić, Katarina
AU  - Gagić, Žarko
AU  - Agbaba, Danica
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3099
AB  - The importance of the activation of phosphatidylinositol-3-kinase (PI3K) in the processes of tumor cell formation and growth has brought great interest in the development of new antitumor drugs that inhibit the PI3K-Akt signaling pathway. Recent studies have shown that in most tumors the activity of p110α isoform of PI3K kinase has been altered, and today special emphasis is placed on developing specific PI3K-α inhibitors. In a series of 92 PI3K-α inhibitors, whose data on experimentally determined inhibitory activity were collected from literature, 3D quantitative structure-activity relationship studies (3D-QSAR) were carried out. All molecular structures were previously optimized using semiempirical PM3 and ab initio Hartree-Fock / 3- 21G methods, and modeling was performed using PLS regression analysis. Calculated parameters of internal (R2=0.84; Q2=0.67) and external (R2pred=0.681; r2m=0.594; Δr2m=0.00039)validation indicate on good reliability and predictive power of created 3D-QSAR model. The analysis of the variables enabled pharmacophore structure determination, which implies: presence of hydrogen bond donor and hydrogen bond acceptor at a distance of 18-18.4Å or 12- 12.4Å, presence of hydrophobic domain and hydrogen bond donor at a distance of 15.2-15.6Å, and presence of steric hotspot at optimal distance from hydrogen bond donor and acceptor. These results will have the relevance in selecting the lead compounds for targeted structural modifications in order to design new selective PI3K-α inhibitors as potential antitumor drugs.
AB  - Značaj aktivacije fosfatidilinozitol-3-kinaza (PI3K) u procesima nastanka i rasta ćelija karcinoma doveo je do velikog interesovanja za razvijanje novih antitumorskih lekova koji inhibiraju PI3K-Akt signalni put. Najnovija istraživanja pokazuju da je kod većine tipova karcinoma izmenjena aktivnost p110α izoforme PI3K kinaze, te se danas poseban akcenat stavlja na razvijanje specifičnih PI3K-α inhibitora. Na seriji od 92 PI3K-α inhibitora, čiji su podaci o eksperimentalno određenoj inhibitornoj aktivnosti prikupljeni iz literature, sprovedene su 3D studije kvantitativnog odnosa između strukture i dejstva (3D-QSAR). Sve molekulske strukture su prethodno optimizovane upotrebom semiempirijske PM3 i ab initio Hartree-Fock/3-21G metode, a modelovanje je vršeno primenom PLS regresione analize najmanjih kvadrata. Izračunati parametri interne (R2=0,84; Q2=0,67) i eksterne (R2pred=0,681; r2m=0,594; Δr2m=0,00039) validacije ukazuju na pouzdanost i dobru moć predviđanja formiranog 3DQSAR modela. Analizom varijabli određena je struktura farmakofore koja podrazumeva: prisustvo donora i akceptora vodonične veze na rastojanju 18-18,4 Å ili 12-12,4 Å; hidrofobni region na rastojanju od 15,2-15,6 Å od donora vodonične veze kao i prisustvo sternog centra na optimalnom rastojanju od donora i akceptora vodonične veze. Ovi rezultati će imati značaj u odabiru vodećih jedinjenja na kojima će biti moguće vršiti ciljane strukturne modifikacije za dizajniranje novih selektivnih PI3K-α inhibitora kao potencijalnih antineoplastika.
PB  - Savez farmaceutskih udruženja Srbije, Beograd
T2  - Arhiv za farmaciju
T1  - Molecular modeling and analysis of the 3D pharmacophore structure of the selective PI3K-α inhibitors as antitumor agents
T1  - Molekulsko modelovanje i analiza 3D-strukture farmakofore selektivnih PI3K-α inhibitora kao antitumorskih agenasa
VL  - 68
IS  - 4
SP  - 860
EP  - 873
DO  - 10.5937/ArhFarm1804860J
ER  - 
@article{
author = "Jovanović, Milan and Nikolić, Katarina and Gagić, Žarko and Agbaba, Danica",
year = "2018",
abstract = "The importance of the activation of phosphatidylinositol-3-kinase (PI3K) in the processes of tumor cell formation and growth has brought great interest in the development of new antitumor drugs that inhibit the PI3K-Akt signaling pathway. Recent studies have shown that in most tumors the activity of p110α isoform of PI3K kinase has been altered, and today special emphasis is placed on developing specific PI3K-α inhibitors. In a series of 92 PI3K-α inhibitors, whose data on experimentally determined inhibitory activity were collected from literature, 3D quantitative structure-activity relationship studies (3D-QSAR) were carried out. All molecular structures were previously optimized using semiempirical PM3 and ab initio Hartree-Fock / 3- 21G methods, and modeling was performed using PLS regression analysis. Calculated parameters of internal (R2=0.84; Q2=0.67) and external (R2pred=0.681; r2m=0.594; Δr2m=0.00039)validation indicate on good reliability and predictive power of created 3D-QSAR model. The analysis of the variables enabled pharmacophore structure determination, which implies: presence of hydrogen bond donor and hydrogen bond acceptor at a distance of 18-18.4Å or 12- 12.4Å, presence of hydrophobic domain and hydrogen bond donor at a distance of 15.2-15.6Å, and presence of steric hotspot at optimal distance from hydrogen bond donor and acceptor. These results will have the relevance in selecting the lead compounds for targeted structural modifications in order to design new selective PI3K-α inhibitors as potential antitumor drugs., Značaj aktivacije fosfatidilinozitol-3-kinaza (PI3K) u procesima nastanka i rasta ćelija karcinoma doveo je do velikog interesovanja za razvijanje novih antitumorskih lekova koji inhibiraju PI3K-Akt signalni put. Najnovija istraživanja pokazuju da je kod većine tipova karcinoma izmenjena aktivnost p110α izoforme PI3K kinaze, te se danas poseban akcenat stavlja na razvijanje specifičnih PI3K-α inhibitora. Na seriji od 92 PI3K-α inhibitora, čiji su podaci o eksperimentalno određenoj inhibitornoj aktivnosti prikupljeni iz literature, sprovedene su 3D studije kvantitativnog odnosa između strukture i dejstva (3D-QSAR). Sve molekulske strukture su prethodno optimizovane upotrebom semiempirijske PM3 i ab initio Hartree-Fock/3-21G metode, a modelovanje je vršeno primenom PLS regresione analize najmanjih kvadrata. Izračunati parametri interne (R2=0,84; Q2=0,67) i eksterne (R2pred=0,681; r2m=0,594; Δr2m=0,00039) validacije ukazuju na pouzdanost i dobru moć predviđanja formiranog 3DQSAR modela. Analizom varijabli određena je struktura farmakofore koja podrazumeva: prisustvo donora i akceptora vodonične veze na rastojanju 18-18,4 Å ili 12-12,4 Å; hidrofobni region na rastojanju od 15,2-15,6 Å od donora vodonične veze kao i prisustvo sternog centra na optimalnom rastojanju od donora i akceptora vodonične veze. Ovi rezultati će imati značaj u odabiru vodećih jedinjenja na kojima će biti moguće vršiti ciljane strukturne modifikacije za dizajniranje novih selektivnih PI3K-α inhibitora kao potencijalnih antineoplastika.",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Molecular modeling and analysis of the 3D pharmacophore structure of the selective PI3K-α inhibitors as antitumor agents, Molekulsko modelovanje i analiza 3D-strukture farmakofore selektivnih PI3K-α inhibitora kao antitumorskih agenasa",
volume = "68",
number = "4",
pages = "860-873",
doi = "10.5937/ArhFarm1804860J"
}
Jovanović, M., Nikolić, K., Gagić, Ž.,& Agbaba, D.. (2018). Molecular modeling and analysis of the 3D pharmacophore structure of the selective PI3K-α inhibitors as antitumor agents. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 68(4), 860-873.
https://doi.org/10.5937/ArhFarm1804860J
Jovanović M, Nikolić K, Gagić Ž, Agbaba D. Molecular modeling and analysis of the 3D pharmacophore structure of the selective PI3K-α inhibitors as antitumor agents. in Arhiv za farmaciju. 2018;68(4):860-873.
doi:10.5937/ArhFarm1804860J .
Jovanović, Milan, Nikolić, Katarina, Gagić, Žarko, Agbaba, Danica, "Molecular modeling and analysis of the 3D pharmacophore structure of the selective PI3K-α inhibitors as antitumor agents" in Arhiv za farmaciju, 68, no. 4 (2018):860-873,
https://doi.org/10.5937/ArhFarm1804860J . .

QSAR modeling and structure based virtual screening of new PI3K/mTOR inhibitors as potential anticancer agents

Oluić, Jelena; Nikolić, Katarina; Vučićević, Jelica; Gagić, Žarko; Filipić, Slavica; Agbaba, Danica

(Springer-Verlag Singapore Pte Ltd, Singapore, 2017)

TY  - CONF
AU  - Oluić, Jelena
AU  - Nikolić, Katarina
AU  - Vučićević, Jelica
AU  - Gagić, Žarko
AU  - Filipić, Slavica
AU  - Agbaba, Danica
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2960
AB  - Phosphatidylinositol-3-kinase (PI3K) / mammalian target of rapamycin (mTOR) kinases belong to the phosphatidylinositol-3-kinase-related kinase (PIKK) family of kinases. Dysregulation of PI3K/mTOR signaling pathway is often detected in various types of malignancies and is correlated with a poor prognosis. PI3K and mTOR share considerable homology in the structure of their active sites and rational advantages of dual inhibition of PI3K/mTOR are known. In order to identify the most important structural determinants that influence antiproliferative activity, 3D-QSAR (quantitative structure activity relationship) studies were performed on two groups of structurally diverse PI3K/mTOR inhibitors. Created QSAR models passed internal and external validation allowing the reliable activity prediction of new PI3K/mTOR inhibitors that were designed based on the obtained 3D-pharmacophores. Initial pool of designed compounds was subjected to structure based virtual screening in order to select the best candidates. Results of this study may be very helpful in further discovery of selective PI3K/mTOR dual inhibitors as novel antineoplastics.
PB  - Springer-Verlag Singapore Pte Ltd, Singapore
C3  - Proceedings of the International Conference on Medical and Biological Engineering 2017 (Cmbebih 2017
T1  - QSAR modeling and structure based virtual screening of new PI3K/mTOR inhibitors as potential anticancer agents
VL  - 62
SP  - 379
EP  - 383
DO  - 10.1007/978-981-10-4166-2_58
ER  - 
@conference{
author = "Oluić, Jelena and Nikolić, Katarina and Vučićević, Jelica and Gagić, Žarko and Filipić, Slavica and Agbaba, Danica",
year = "2017",
abstract = "Phosphatidylinositol-3-kinase (PI3K) / mammalian target of rapamycin (mTOR) kinases belong to the phosphatidylinositol-3-kinase-related kinase (PIKK) family of kinases. Dysregulation of PI3K/mTOR signaling pathway is often detected in various types of malignancies and is correlated with a poor prognosis. PI3K and mTOR share considerable homology in the structure of their active sites and rational advantages of dual inhibition of PI3K/mTOR are known. In order to identify the most important structural determinants that influence antiproliferative activity, 3D-QSAR (quantitative structure activity relationship) studies were performed on two groups of structurally diverse PI3K/mTOR inhibitors. Created QSAR models passed internal and external validation allowing the reliable activity prediction of new PI3K/mTOR inhibitors that were designed based on the obtained 3D-pharmacophores. Initial pool of designed compounds was subjected to structure based virtual screening in order to select the best candidates. Results of this study may be very helpful in further discovery of selective PI3K/mTOR dual inhibitors as novel antineoplastics.",
publisher = "Springer-Verlag Singapore Pte Ltd, Singapore",
journal = "Proceedings of the International Conference on Medical and Biological Engineering 2017 (Cmbebih 2017",
title = "QSAR modeling and structure based virtual screening of new PI3K/mTOR inhibitors as potential anticancer agents",
volume = "62",
pages = "379-383",
doi = "10.1007/978-981-10-4166-2_58"
}
Oluić, J., Nikolić, K., Vučićević, J., Gagić, Ž., Filipić, S.,& Agbaba, D.. (2017). QSAR modeling and structure based virtual screening of new PI3K/mTOR inhibitors as potential anticancer agents. in Proceedings of the International Conference on Medical and Biological Engineering 2017 (Cmbebih 2017
Springer-Verlag Singapore Pte Ltd, Singapore., 62, 379-383.
https://doi.org/10.1007/978-981-10-4166-2_58
Oluić J, Nikolić K, Vučićević J, Gagić Ž, Filipić S, Agbaba D. QSAR modeling and structure based virtual screening of new PI3K/mTOR inhibitors as potential anticancer agents. in Proceedings of the International Conference on Medical and Biological Engineering 2017 (Cmbebih 2017. 2017;62:379-383.
doi:10.1007/978-981-10-4166-2_58 .
Oluić, Jelena, Nikolić, Katarina, Vučićević, Jelica, Gagić, Žarko, Filipić, Slavica, Agbaba, Danica, "QSAR modeling and structure based virtual screening of new PI3K/mTOR inhibitors as potential anticancer agents" in Proceedings of the International Conference on Medical and Biological Engineering 2017 (Cmbebih 2017, 62 (2017):379-383,
https://doi.org/10.1007/978-981-10-4166-2_58 . .
2
1
1

3D-QSAR, Virtual Screening, Docking and Design of Dual PI3K/mTOR Inhibitors with Enhanced Antiproliferative Activity

Oluić, Jelena; Nikolić, Katarina; Vučićević, Jelica; Gagić, Žarko; Filipić, Slavica; Agbaba, Danica

(Bentham Science Publ Ltd, Sharjah, 2017)

TY  - JOUR
AU  - Oluić, Jelena
AU  - Nikolić, Katarina
AU  - Vučićević, Jelica
AU  - Gagić, Žarko
AU  - Filipić, Slavica
AU  - Agbaba, Danica
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2818
AB  - Aim and Objective: Altered activity of PI3K/mTOR signaling pathway is one of the most common aberrations found in various forms of neoplastic lesions. Dual inhibition of PI3K and mTOR represents a reasonably attractive concept in potential cancer treatment. The main aim of this work was to design novel PI3K/mTOR inhibitors with enhanced antiproliferative activity. Materials and Methods: 3D-QSAR pharmacophore modeling studies were performed on two groups comprised of 37 and 48 dual PI3K/mTOR inhibitors. Obtained 3D-pharmacophores were used in design of new dual PI3K/mTOR inhibitors. Based on the in silico ADMET data, structure-based virtual screening and docking studies, the most promising novel candidates were selected. Results: Four reliable PLS models with good statistical parameters (q(2) (=) 0.72, r(pred)(2) = 0.93; q(2) = 0.81, r(pred)(2) = 0.88 for 3D-QSAR (mTOR) models and q(2) = 0.79, r(pred)(2) = 0.93; q(2) = 0.79, r(pred)(2) = 0.94 for 3D-QSAR (PI3K) models) were obtained and new highly selective and potent dual PI3K/mTOR inhibitors were designed. Further in silico ADMET profiling of the designed compounds selected the most promising novel PI3K/mTOR inhibitors as drug candidates. Results of the 3D-QSAR studies were confirmed by structure-based virtual screening protocol that identified selected designed compounds as a best fit for PI3K and mTOR receptors. Molecular docking studies on PI3K and mTOR crystal structures revealed the key active site residues involved in binding of PI3K/mTOR ligands. Conclusion: After combining the results of 3D-QSAR, ADMET profiling, virtual screening and docking, compounds 56-57 and 56-62 were chosen as the most promising new dual PI3K/mTOR inhibitors.
PB  - Bentham Science Publ Ltd, Sharjah
T2  - Combinatorial Chemistry & High Throughput Screening
T1  - 3D-QSAR, Virtual Screening, Docking and Design of Dual PI3K/mTOR Inhibitors with Enhanced Antiproliferative Activity
VL  - 20
IS  - 4
SP  - 292
EP  - 303
DO  - 10.2174/1386207320666170427143858
ER  - 
@article{
author = "Oluić, Jelena and Nikolić, Katarina and Vučićević, Jelica and Gagić, Žarko and Filipić, Slavica and Agbaba, Danica",
year = "2017",
abstract = "Aim and Objective: Altered activity of PI3K/mTOR signaling pathway is one of the most common aberrations found in various forms of neoplastic lesions. Dual inhibition of PI3K and mTOR represents a reasonably attractive concept in potential cancer treatment. The main aim of this work was to design novel PI3K/mTOR inhibitors with enhanced antiproliferative activity. Materials and Methods: 3D-QSAR pharmacophore modeling studies were performed on two groups comprised of 37 and 48 dual PI3K/mTOR inhibitors. Obtained 3D-pharmacophores were used in design of new dual PI3K/mTOR inhibitors. Based on the in silico ADMET data, structure-based virtual screening and docking studies, the most promising novel candidates were selected. Results: Four reliable PLS models with good statistical parameters (q(2) (=) 0.72, r(pred)(2) = 0.93; q(2) = 0.81, r(pred)(2) = 0.88 for 3D-QSAR (mTOR) models and q(2) = 0.79, r(pred)(2) = 0.93; q(2) = 0.79, r(pred)(2) = 0.94 for 3D-QSAR (PI3K) models) were obtained and new highly selective and potent dual PI3K/mTOR inhibitors were designed. Further in silico ADMET profiling of the designed compounds selected the most promising novel PI3K/mTOR inhibitors as drug candidates. Results of the 3D-QSAR studies were confirmed by structure-based virtual screening protocol that identified selected designed compounds as a best fit for PI3K and mTOR receptors. Molecular docking studies on PI3K and mTOR crystal structures revealed the key active site residues involved in binding of PI3K/mTOR ligands. Conclusion: After combining the results of 3D-QSAR, ADMET profiling, virtual screening and docking, compounds 56-57 and 56-62 were chosen as the most promising new dual PI3K/mTOR inhibitors.",
publisher = "Bentham Science Publ Ltd, Sharjah",
journal = "Combinatorial Chemistry & High Throughput Screening",
title = "3D-QSAR, Virtual Screening, Docking and Design of Dual PI3K/mTOR Inhibitors with Enhanced Antiproliferative Activity",
volume = "20",
number = "4",
pages = "292-303",
doi = "10.2174/1386207320666170427143858"
}
Oluić, J., Nikolić, K., Vučićević, J., Gagić, Ž., Filipić, S.,& Agbaba, D.. (2017). 3D-QSAR, Virtual Screening, Docking and Design of Dual PI3K/mTOR Inhibitors with Enhanced Antiproliferative Activity. in Combinatorial Chemistry & High Throughput Screening
Bentham Science Publ Ltd, Sharjah., 20(4), 292-303.
https://doi.org/10.2174/1386207320666170427143858
Oluić J, Nikolić K, Vučićević J, Gagić Ž, Filipić S, Agbaba D. 3D-QSAR, Virtual Screening, Docking and Design of Dual PI3K/mTOR Inhibitors with Enhanced Antiproliferative Activity. in Combinatorial Chemistry & High Throughput Screening. 2017;20(4):292-303.
doi:10.2174/1386207320666170427143858 .
Oluić, Jelena, Nikolić, Katarina, Vučićević, Jelica, Gagić, Žarko, Filipić, Slavica, Agbaba, Danica, "3D-QSAR, Virtual Screening, Docking and Design of Dual PI3K/mTOR Inhibitors with Enhanced Antiproliferative Activity" in Combinatorial Chemistry & High Throughput Screening, 20, no. 4 (2017):292-303,
https://doi.org/10.2174/1386207320666170427143858 . .
7
7
7

QSAR studies and design of new analogs of vitamin E with enhanced antiproliferative activity on MCF-7 breast cancer cells

Gagić, Žarko; Nikolić, Katarina; Ivković, Branka; Filipić, Slavica; Agbaba, Danica

(Elsevier Science BV, Amsterdam, 2016)

TY  - JOUR
AU  - Gagić, Žarko
AU  - Nikolić, Katarina
AU  - Ivković, Branka
AU  - Filipić, Slavica
AU  - Agbaba, Danica
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2562
AB  - Vitamin E is group of natural antioxidants comprised of tocopherols and tocotrienols. Structural analogs of vitamin E exhibit selective antiproliferative activity that has been intensively studied over the last decade in various cancer cells (MCF-7, MDA-MB-231, LNCaP, PC-3, A549, K562, Jurkat). 2D- and 3D-QSAR studies were applied on a series of 30 derivatives of tocopherols, tocotrienols and chromane with antiproliferative activity in MCF-7 breast cancer cell line. All molecular structures were previously optimized using ab initio Hartree-Fock/3-21 G method. Partial Least Square Regression analysis was used to develop 2D- and 3D-QSAR model. Statistical parameters: R-2 = 0.798, Q(2) = 0.772, R-pred(2) = 0.685 (2D-QSAR) and R-2 = 0.960, Q(2) = 0.830, R-pred(2) = 0.649 (3D-QSAR) indicated on good predictive power of both models. Based on the applied QSAR studies were identified molecular determinant with the greatest influence on the antiproliferative activity and designed novel compounds with enhanced activity against MCF-7 breast cancer cells.
PB  - Elsevier Science BV, Amsterdam
T2  - Journal of the Taiwan Institute of Chemical Engineers
T1  - QSAR studies and design of new analogs of vitamin E with enhanced antiproliferative activity on MCF-7 breast cancer cells
VL  - 59
SP  - 33
EP  - 44
DO  - 10.1016/j.jtice.2015.07.019
ER  - 
@article{
author = "Gagić, Žarko and Nikolić, Katarina and Ivković, Branka and Filipić, Slavica and Agbaba, Danica",
year = "2016",
abstract = "Vitamin E is group of natural antioxidants comprised of tocopherols and tocotrienols. Structural analogs of vitamin E exhibit selective antiproliferative activity that has been intensively studied over the last decade in various cancer cells (MCF-7, MDA-MB-231, LNCaP, PC-3, A549, K562, Jurkat). 2D- and 3D-QSAR studies were applied on a series of 30 derivatives of tocopherols, tocotrienols and chromane with antiproliferative activity in MCF-7 breast cancer cell line. All molecular structures were previously optimized using ab initio Hartree-Fock/3-21 G method. Partial Least Square Regression analysis was used to develop 2D- and 3D-QSAR model. Statistical parameters: R-2 = 0.798, Q(2) = 0.772, R-pred(2) = 0.685 (2D-QSAR) and R-2 = 0.960, Q(2) = 0.830, R-pred(2) = 0.649 (3D-QSAR) indicated on good predictive power of both models. Based on the applied QSAR studies were identified molecular determinant with the greatest influence on the antiproliferative activity and designed novel compounds with enhanced activity against MCF-7 breast cancer cells.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Journal of the Taiwan Institute of Chemical Engineers",
title = "QSAR studies and design of new analogs of vitamin E with enhanced antiproliferative activity on MCF-7 breast cancer cells",
volume = "59",
pages = "33-44",
doi = "10.1016/j.jtice.2015.07.019"
}
Gagić, Ž., Nikolić, K., Ivković, B., Filipić, S.,& Agbaba, D.. (2016). QSAR studies and design of new analogs of vitamin E with enhanced antiproliferative activity on MCF-7 breast cancer cells. in Journal of the Taiwan Institute of Chemical Engineers
Elsevier Science BV, Amsterdam., 59, 33-44.
https://doi.org/10.1016/j.jtice.2015.07.019
Gagić Ž, Nikolić K, Ivković B, Filipić S, Agbaba D. QSAR studies and design of new analogs of vitamin E with enhanced antiproliferative activity on MCF-7 breast cancer cells. in Journal of the Taiwan Institute of Chemical Engineers. 2016;59:33-44.
doi:10.1016/j.jtice.2015.07.019 .
Gagić, Žarko, Nikolić, Katarina, Ivković, Branka, Filipić, Slavica, Agbaba, Danica, "QSAR studies and design of new analogs of vitamin E with enhanced antiproliferative activity on MCF-7 breast cancer cells" in Journal of the Taiwan Institute of Chemical Engineers, 59 (2016):33-44,
https://doi.org/10.1016/j.jtice.2015.07.019 . .
24
14
18

Synthesis of the vitamin E amino acid esters with an enhanced anticancer activity and in silico screening for new antineoplastic drugs

Gagić, Žarko; Ivković, Branka; Srdić-Rajić, Tatjana; Vučićević, Jelica; Nikolić, Katarina; Agbaba, Danica

(Elsevier Science BV, Amsterdam, 2016)

TY  - JOUR
AU  - Gagić, Žarko
AU  - Ivković, Branka
AU  - Srdić-Rajić, Tatjana
AU  - Vučićević, Jelica
AU  - Nikolić, Katarina
AU  - Agbaba, Danica
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2532
AB  - Tocopherols and tocotrienols belong to the family of vitamin E (VE) with the well-known antioxidant properties. For certain alpha-tocopherol and gamma-tocotrienol derivatives used as the lead compounds in this study, antitumor activities against various cancer cell types have been reported. In the course of the last decade, structural analogs of VE (esters, ethers and amides) with an enhanced antiproliferative and proapoptotic activity against various cancer cells were synthesized. Within the framework of this study, seven amino acid esters of alpha-tocopherol (4a-d) and gamma-tocotrienol (6a-c) were prepared using the EDC/DMAP reaction conditions and their ability to inhibit proliferation of the MCF-7 and MDA-MB-231 breast cancer cells and the A549 lung cancer cells was evaluated. Compound 6a showed an activity against all three cell lines (IC50: 20.6 mu M, 28.6 mu M and 19 mu M for the MCF-7, MDA-MB-231 and A549 cells, respectively), while compound 4a inhibited proliferation of the MCF-7 (IC50 = 8.6 mu M) and A549 cells (IC50 = 8.6 mu M). Ester 4d exerted strong antiproliferative activity against the estrogenunresponsive, multi-drug resistant MDA-MB-231 breast cancer cell line, with IC50 value of 9.2 mu M. Compared with the strong activity of compounds 4a, 4d and 6a, commercial alpha-tocopheryl succinate and gamma-tocotrienol showed only a limited activity against all three cell lines, with IC50 values >50 mu M. Investigation of the cell cycle phase distribution and the cell death induction confirmed an apoptosis of the MDA-MB-231 cells treated with 4d, as well as a synergistic effect of 4d with the known anticancer drug doxorubicin. This result suggests a possibility of a combined therapy of breast cancer in order to improve the therapeutic response and to lower the toxicity associated with a high dose of doxorubicin. The stability study of 4d in human plasma showed that ca. 83% initial concentration of this compound remains in plasma in the course of six hours incubation. The ligand based virtual screening of the ChEMBL database identified new compounds with a potential antiproliferative activity on MCF-7 and on multi-drug resistant MDA-MB 231 breast cancer cells.
PB  - Elsevier Science BV, Amsterdam
T2  - European Journal of Pharmaceutical Sciences
T1  - Synthesis of the vitamin E amino acid esters with an enhanced anticancer activity and in silico screening for new antineoplastic drugs
VL  - 88
SP  - 59
EP  - 69
DO  - 10.1016/j.ejps.2016.04.008
ER  - 
@article{
author = "Gagić, Žarko and Ivković, Branka and Srdić-Rajić, Tatjana and Vučićević, Jelica and Nikolić, Katarina and Agbaba, Danica",
year = "2016",
abstract = "Tocopherols and tocotrienols belong to the family of vitamin E (VE) with the well-known antioxidant properties. For certain alpha-tocopherol and gamma-tocotrienol derivatives used as the lead compounds in this study, antitumor activities against various cancer cell types have been reported. In the course of the last decade, structural analogs of VE (esters, ethers and amides) with an enhanced antiproliferative and proapoptotic activity against various cancer cells were synthesized. Within the framework of this study, seven amino acid esters of alpha-tocopherol (4a-d) and gamma-tocotrienol (6a-c) were prepared using the EDC/DMAP reaction conditions and their ability to inhibit proliferation of the MCF-7 and MDA-MB-231 breast cancer cells and the A549 lung cancer cells was evaluated. Compound 6a showed an activity against all three cell lines (IC50: 20.6 mu M, 28.6 mu M and 19 mu M for the MCF-7, MDA-MB-231 and A549 cells, respectively), while compound 4a inhibited proliferation of the MCF-7 (IC50 = 8.6 mu M) and A549 cells (IC50 = 8.6 mu M). Ester 4d exerted strong antiproliferative activity against the estrogenunresponsive, multi-drug resistant MDA-MB-231 breast cancer cell line, with IC50 value of 9.2 mu M. Compared with the strong activity of compounds 4a, 4d and 6a, commercial alpha-tocopheryl succinate and gamma-tocotrienol showed only a limited activity against all three cell lines, with IC50 values >50 mu M. Investigation of the cell cycle phase distribution and the cell death induction confirmed an apoptosis of the MDA-MB-231 cells treated with 4d, as well as a synergistic effect of 4d with the known anticancer drug doxorubicin. This result suggests a possibility of a combined therapy of breast cancer in order to improve the therapeutic response and to lower the toxicity associated with a high dose of doxorubicin. The stability study of 4d in human plasma showed that ca. 83% initial concentration of this compound remains in plasma in the course of six hours incubation. The ligand based virtual screening of the ChEMBL database identified new compounds with a potential antiproliferative activity on MCF-7 and on multi-drug resistant MDA-MB 231 breast cancer cells.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "European Journal of Pharmaceutical Sciences",
title = "Synthesis of the vitamin E amino acid esters with an enhanced anticancer activity and in silico screening for new antineoplastic drugs",
volume = "88",
pages = "59-69",
doi = "10.1016/j.ejps.2016.04.008"
}
Gagić, Ž., Ivković, B., Srdić-Rajić, T., Vučićević, J., Nikolić, K.,& Agbaba, D.. (2016). Synthesis of the vitamin E amino acid esters with an enhanced anticancer activity and in silico screening for new antineoplastic drugs. in European Journal of Pharmaceutical Sciences
Elsevier Science BV, Amsterdam., 88, 59-69.
https://doi.org/10.1016/j.ejps.2016.04.008
Gagić Ž, Ivković B, Srdić-Rajić T, Vučićević J, Nikolić K, Agbaba D. Synthesis of the vitamin E amino acid esters with an enhanced anticancer activity and in silico screening for new antineoplastic drugs. in European Journal of Pharmaceutical Sciences. 2016;88:59-69.
doi:10.1016/j.ejps.2016.04.008 .
Gagić, Žarko, Ivković, Branka, Srdić-Rajić, Tatjana, Vučićević, Jelica, Nikolić, Katarina, Agbaba, Danica, "Synthesis of the vitamin E amino acid esters with an enhanced anticancer activity and in silico screening for new antineoplastic drugs" in European Journal of Pharmaceutical Sciences, 88 (2016):59-69,
https://doi.org/10.1016/j.ejps.2016.04.008 . .
7
8
8
10

Primena različitih in vitro tehnika za predviđanje permeabilnosti kroz krvno-moždanu barijeru liganada imidazolinskih receptora

Vučićević, Jelica; Popović, Marija; Nikolić, Katarina; Filipić, Slavica; Gagić, Žarko; Agbaba, Danica

(Univerzitet Crne Gore Farmaceutski fakultet, 2015)

TY  - CONF
AU  - Vučićević, Jelica
AU  - Popović, Marija
AU  - Nikolić, Katarina
AU  - Filipić, Slavica
AU  - Gagić, Žarko
AU  - Agbaba, Danica
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5029
AB  - Ligandi imidazolinskih receptora predstavljaju brojnu familiju biološki aktivnih jedinjenja koja
imaju široku terapijsku primenu. Ovi ligandi mogu delovati na tri tipa imidazolinskih receptora (I1-
IR, I2-IR and I3-IR) I na alfa2-adreno receptore. Imidazolinski receptori suodgovorni za različite
biološke aktivnosti imidazolina. Stoga neki IRs ligandi su danas značajni za ispitivanje kao
novi centralno delujući antihipertenzivi i potencijalni kandidati za lečenje različitih neuroloških
oboljenja. Cilj ovog rada je bio da se proceni permeabilnost ovih liganada kroz Krvno-Moždanu
Barijeru (KMB).
Test permeabilnosti na veštačkim paralelnim membranama (eng. Parallel Artificial Membrane
Permeability Assay, PAMPA), bioparticiona micelarna hromatografija (eng. Biopartitioning
Micellar Chromatography, BMC) i reverzno-fazna tečna hromatografija pod visokim pritiskom
(eng. Reversed-Phase High-Performance Liquid Chromatography, RP-HPLC) su in vitro tehnike
korišćenje za predviđnje permeabilnosti kroz KMB imidazolinsih liganada. Vrednosti dobijene
korišćenjem PAMPA i BMC su ispitivane metodologijom kvantitativnog odnosa struktura i
osobina jedinjenja (eng. Quantitative Structure-Property Relationship, QSPR).
Retencioni faktori dobijeni korišćenjem BMC I RP-HPLC su korelisani sa koeficijentima
permeabilnosti dobijeni korišćenjem PAMPA. Pored toga, PLS (eng. Partial Least Square), MLR
(eng. Multiple Linear Regression) i ANN (eng. Artificial Neural Networks) modeli su razvijeni
korišćenjem retencionih podataka iz BMC sistema/efektivnih permeabilnosti iz PAMPA I
molekulskih parametara izračunatih za optimizovane strukture. Dominantni molekulski/katjonski
oblici jedinjenja na pH=7.4 su dobijeni korišćenjem MarvinSketch. Geometrijska optimizacija
liganada je izvršena korišćenjem Chem3DBio Ultra. Molekulski deskriptori za optimizovana
jedinjenja su izračunati korišćenjem Chem3DBio Ultra, Dragon and ADMET predictor programa.
U ovoj QSPR studiji retencioni faktori/efektivne permeabilnosti jedinjenja su korišćene kao
zavisne, dok izračunati deskriptori su korišćeni kao nezavisne varijable. SIMCA je korišćena za
PLS analizu dok je postupno MLR i ANN modeliranje izvršeno korišćenjem STASTICA Neural
Networks programa. Prognostički potencijal formiranih QSPR modela je potvrđen ukrštenom i
eksternom validacijom.
Formirani QSPR modeli mogu biti korišćeni kao brzi skrining metod za procenu krvno-moždane
permeabilnosti novih liganada imidazolinskih receptora, koji predstavljaju potencijalne kandidate
u lečenju hipertenizije i neuroloških oboljenja.
AB  - Imidazoline receptor ligands are a numerous family of biologically active compounds with many
therapeutic applications. Those ligands can act at the three types of imidazoline receptors (I1-IR, I2-
IR and I3-IR) and alpha2-adrenoceptors. Imidazoline receptors (IRs) are responsible for the versatile
biological activities of imidazolines. Therefore some IRs ligands are examined as novel centrally 192
acting antihypertensives and drug candidates for treatment of various neurological diseases. The
aim of this work was to evaluate Blood-Brain Barrier (BBB) permeability of these ligand. ParallelArtificial Membrane Permeability Assay (PAMPA) Biopartitioning Micellar Chromatography (BMC) and Reversed-Phase High-Performance Liquid Chromatography (RP HPLC) are in vitro
techniques used for predicting BBB penetration of imidazoline ligands. The values obtained using
PAMPA and BMC were studied by the Quantitative Structure-Property Relationship (QSPR)
methodology.
5HWHQLRQ IDFWRUV REWDLQHG XVLQJ %0& DQG 53 +3/& ZHUH FRUUHODWHG ZLWK SHUPHDELOLW\ FRHI¿FLHQWV 
obtained using PAMPA. Further, Partial Least Square (PLS), Multiple Linear Regression (MLR)
DQG  $UWL¿FLDO  1HXUDO  1HWZRUNV  $11   PRGHOV  ZHUH  GHYHORSHG  XVLQJ    UHWHQWLRQ  GDWD  IURP  %0& 
system/effective permeabilities from PAMPA and molecular parameters calculated for the optimized
FRPSRXQGV  7KH GRPLQDQW PROHFXOHV FDWLRQ VSHFLHV RI FRPSRXQGV DW S+     KDYH EHHQ REWDLQHG 
using the MarvinSketch. Chem3DBio Ultra program was applied for geometry optimization. The
molecular descriptors were calculated for the optimized compounds using ChemBio3D Ultra, Dragon
and ADMET predictor software. Retention factors/effective permeabilities of compounds were used
as dependant variable, while calculated molecular parametres were used as independent variables
in the QSPR study. SIMCA was used for PLS analysis, while the stepwise MLR and ANN modeling
were performed using STASTICA Neural Networks. Predictive potential of the formed models was
FRQ¿UPHG E\ /HDYH 2QH 2XW &URVV  DQG H[WHUQDO YDOLGDWLRQ 
Formed QSPR models can be used as a fast screening method for assessment of brain penetration
of novel imidazoline receptor ligands, as promissing drug candidates for treatment of hypertension
or neurological diseases.
PB  - Univerzitet Crne Gore Farmaceutski fakultet
PB  - Farmaceutska komora Crne Gore
C3  - II Congress of pharmacists of Montenegro with the international participation, 28-31.may 2015. Budva, Montenegro, Abstract book
T1  - Primena različitih in vitro tehnika za predviđanje permeabilnosti kroz krvno-moždanu barijeru liganada imidazolinskih receptora
T1  - Application of different in vitro techniques for predicting blood brain barrier penetration imidazoline receptor ligands
SP  - 190
EP  - 192
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5029
ER  - 
@conference{
author = "Vučićević, Jelica and Popović, Marija and Nikolić, Katarina and Filipić, Slavica and Gagić, Žarko and Agbaba, Danica",
year = "2015",
abstract = "Ligandi imidazolinskih receptora predstavljaju brojnu familiju biološki aktivnih jedinjenja koja
imaju široku terapijsku primenu. Ovi ligandi mogu delovati na tri tipa imidazolinskih receptora (I1-
IR, I2-IR and I3-IR) I na alfa2-adreno receptore. Imidazolinski receptori suodgovorni za različite
biološke aktivnosti imidazolina. Stoga neki IRs ligandi su danas značajni za ispitivanje kao
novi centralno delujući antihipertenzivi i potencijalni kandidati za lečenje različitih neuroloških
oboljenja. Cilj ovog rada je bio da se proceni permeabilnost ovih liganada kroz Krvno-Moždanu
Barijeru (KMB).
Test permeabilnosti na veštačkim paralelnim membranama (eng. Parallel Artificial Membrane
Permeability Assay, PAMPA), bioparticiona micelarna hromatografija (eng. Biopartitioning
Micellar Chromatography, BMC) i reverzno-fazna tečna hromatografija pod visokim pritiskom
(eng. Reversed-Phase High-Performance Liquid Chromatography, RP-HPLC) su in vitro tehnike
korišćenje za predviđnje permeabilnosti kroz KMB imidazolinsih liganada. Vrednosti dobijene
korišćenjem PAMPA i BMC su ispitivane metodologijom kvantitativnog odnosa struktura i
osobina jedinjenja (eng. Quantitative Structure-Property Relationship, QSPR).
Retencioni faktori dobijeni korišćenjem BMC I RP-HPLC su korelisani sa koeficijentima
permeabilnosti dobijeni korišćenjem PAMPA. Pored toga, PLS (eng. Partial Least Square), MLR
(eng. Multiple Linear Regression) i ANN (eng. Artificial Neural Networks) modeli su razvijeni
korišćenjem retencionih podataka iz BMC sistema/efektivnih permeabilnosti iz PAMPA I
molekulskih parametara izračunatih za optimizovane strukture. Dominantni molekulski/katjonski
oblici jedinjenja na pH=7.4 su dobijeni korišćenjem MarvinSketch. Geometrijska optimizacija
liganada je izvršena korišćenjem Chem3DBio Ultra. Molekulski deskriptori za optimizovana
jedinjenja su izračunati korišćenjem Chem3DBio Ultra, Dragon and ADMET predictor programa.
U ovoj QSPR studiji retencioni faktori/efektivne permeabilnosti jedinjenja su korišćene kao
zavisne, dok izračunati deskriptori su korišćeni kao nezavisne varijable. SIMCA je korišćena za
PLS analizu dok je postupno MLR i ANN modeliranje izvršeno korišćenjem STASTICA Neural
Networks programa. Prognostički potencijal formiranih QSPR modela je potvrđen ukrštenom i
eksternom validacijom.
Formirani QSPR modeli mogu biti korišćeni kao brzi skrining metod za procenu krvno-moždane
permeabilnosti novih liganada imidazolinskih receptora, koji predstavljaju potencijalne kandidate
u lečenju hipertenizije i neuroloških oboljenja., Imidazoline receptor ligands are a numerous family of biologically active compounds with many
therapeutic applications. Those ligands can act at the three types of imidazoline receptors (I1-IR, I2-
IR and I3-IR) and alpha2-adrenoceptors. Imidazoline receptors (IRs) are responsible for the versatile
biological activities of imidazolines. Therefore some IRs ligands are examined as novel centrally 192
acting antihypertensives and drug candidates for treatment of various neurological diseases. The
aim of this work was to evaluate Blood-Brain Barrier (BBB) permeability of these ligand. ParallelArtificial Membrane Permeability Assay (PAMPA) Biopartitioning Micellar Chromatography (BMC) and Reversed-Phase High-Performance Liquid Chromatography (RP HPLC) are in vitro
techniques used for predicting BBB penetration of imidazoline ligands. The values obtained using
PAMPA and BMC were studied by the Quantitative Structure-Property Relationship (QSPR)
methodology.
5HWHQLRQ IDFWRUV REWDLQHG XVLQJ %0& DQG 53 +3/& ZHUH FRUUHODWHG ZLWK SHUPHDELOLW\ FRHI¿FLHQWV 
obtained using PAMPA. Further, Partial Least Square (PLS), Multiple Linear Regression (MLR)
DQG  $UWL¿FLDO  1HXUDO  1HWZRUNV  $11   PRGHOV  ZHUH  GHYHORSHG  XVLQJ    UHWHQWLRQ  GDWD  IURP  %0& 
system/effective permeabilities from PAMPA and molecular parameters calculated for the optimized
FRPSRXQGV  7KH GRPLQDQW PROHFXOHV FDWLRQ VSHFLHV RI FRPSRXQGV DW S+     KDYH EHHQ REWDLQHG 
using the MarvinSketch. Chem3DBio Ultra program was applied for geometry optimization. The
molecular descriptors were calculated for the optimized compounds using ChemBio3D Ultra, Dragon
and ADMET predictor software. Retention factors/effective permeabilities of compounds were used
as dependant variable, while calculated molecular parametres were used as independent variables
in the QSPR study. SIMCA was used for PLS analysis, while the stepwise MLR and ANN modeling
were performed using STASTICA Neural Networks. Predictive potential of the formed models was
FRQ¿UPHG E\ /HDYH 2QH 2XW &URVV  DQG H[WHUQDO YDOLGDWLRQ 
Formed QSPR models can be used as a fast screening method for assessment of brain penetration
of novel imidazoline receptor ligands, as promissing drug candidates for treatment of hypertension
or neurological diseases.",
publisher = "Univerzitet Crne Gore Farmaceutski fakultet, Farmaceutska komora Crne Gore",
journal = "II Congress of pharmacists of Montenegro with the international participation, 28-31.may 2015. Budva, Montenegro, Abstract book",
title = "Primena različitih in vitro tehnika za predviđanje permeabilnosti kroz krvno-moždanu barijeru liganada imidazolinskih receptora, Application of different in vitro techniques for predicting blood brain barrier penetration imidazoline receptor ligands",
pages = "190-192",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5029"
}
Vučićević, J., Popović, M., Nikolić, K., Filipić, S., Gagić, Ž.,& Agbaba, D.. (2015). Primena različitih in vitro tehnika za predviđanje permeabilnosti kroz krvno-moždanu barijeru liganada imidazolinskih receptora. in II Congress of pharmacists of Montenegro with the international participation, 28-31.may 2015. Budva, Montenegro, Abstract book
Univerzitet Crne Gore Farmaceutski fakultet., 190-192.
https://hdl.handle.net/21.15107/rcub_farfar_5029
Vučićević J, Popović M, Nikolić K, Filipić S, Gagić Ž, Agbaba D. Primena različitih in vitro tehnika za predviđanje permeabilnosti kroz krvno-moždanu barijeru liganada imidazolinskih receptora. in II Congress of pharmacists of Montenegro with the international participation, 28-31.may 2015. Budva, Montenegro, Abstract book. 2015;:190-192.
https://hdl.handle.net/21.15107/rcub_farfar_5029 .
Vučićević, Jelica, Popović, Marija, Nikolić, Katarina, Filipić, Slavica, Gagić, Žarko, Agbaba, Danica, "Primena različitih in vitro tehnika za predviđanje permeabilnosti kroz krvno-moždanu barijeru liganada imidazolinskih receptora" in II Congress of pharmacists of Montenegro with the international participation, 28-31.may 2015. Budva, Montenegro, Abstract book (2015):190-192,
https://hdl.handle.net/21.15107/rcub_farfar_5029 .

Application of thin layer and column chromatography in monitoring the synthesis of α- tocopheryl-lysine ester

Gagić, Žarko; Ivković, Branka; Nikolić, Katarina; Agbaba, Danica

(Savez farmaceutskih udruženja Srbije, Beograd, 2014)

TY  - JOUR
AU  - Gagić, Žarko
AU  - Ivković, Branka
AU  - Nikolić, Katarina
AU  - Agbaba, Danica
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2278
AB  - Vitamin E comprises of two families of compounds, tocopherols and tocotrienols. It is well known for its antioxidant activity, but recently special attention is paid to the use of vitamin E and its derivatives in the prevention and the treatment of cancer. Various derivatives of vitamin E are synthesized, which exhibit antiproliferative activity. It has been shown that the α-tocopherol ester with the amino acid lysine exhibits improved antiproliferative activity on MCF-7 breast cancer cell line as compared to commercially available preparations. The first stage was the synthesis of α-tocopherol ester with di-Cbz-lysine. Synthesis of ester was monitored by thin layer chromatography (mobile phase: n-hexane-ethyl acetate 3: 1,2 v/v) and the purification of product was done by dry flash column chromatography and by preparative plate chromatography (mobile phase: n-hexane-ethyl acetate 3: 1,2 v/v). In the second stage, Cbz protecting groups were removed by catalytic hydrogenation. The final product α- tocopheryl-lysine ester was detected by TLC (mobile phase: dichloromethane-methanolammonia 9 : 0,9 : 0,1 v/v).
AB  - Vitamin E sačinjavaju dve klase jedinjenja, tokoferoli i tokotrienoli. Dobro je poznata njegova antioksidativna aktivnost, a danas se posebna pažnja obraća na upotrebu vitamina E i njegovih derivata u prevenciji i terapiji kancera. Sintetisani su brojni derivati vitamina E koji ispoljavaju antiproliferativnu aktivnost. Pokazano je da estar α-tokoferola sa aminokiselinom lizinom ispoljava bolju antiproliferativnu aktivnost na MCF-7 ćelijskoj liniji karcinoma dojke u odnosu na komercijalno dostupne preparate. U prvoj fazi sintetisan je estar α-tokoferola sa di- Cbz-lizinom. Tok sinteze estra praćen je metodom tankoslojne hromatografije (mobilna faza: nheksan/ etilacetat 3: 1,2 v/v), dok je prečišćavanje proizvoda izvršeno dry flash hromatografijom i preparativnom hromatografijom na ploči (mobilna faza: n-heksan -etil acetat 3: 1,2 v/v). U drugoj fazi katalitičkom hidrogenacijom uklonjene su zaštitne Cbz-grupe sa amino grupa lizina. Finalni proizvod α-tokoferil lizin estar detektovan je primenom TLC metode (mobilna faza: dihlormetan-metanol-amonijak 9 : 0,9 : 0,1 v/v/v).
PB  - Savez farmaceutskih udruženja Srbije, Beograd
T2  - Arhiv za farmaciju
T1  - Application of thin layer and column chromatography in monitoring the synthesis of α- tocopheryl-lysine ester
T1  - Primena metoda tankoslojne hromatografije i hromatografije na koloni u praćenju sinteze α-tokoferil-lizin estra
VL  - 64
IS  - 3
SP  - 261
EP  - 270
DO  - 10.5937/arhfarm1403261G
ER  - 
@article{
author = "Gagić, Žarko and Ivković, Branka and Nikolić, Katarina and Agbaba, Danica",
year = "2014",
abstract = "Vitamin E comprises of two families of compounds, tocopherols and tocotrienols. It is well known for its antioxidant activity, but recently special attention is paid to the use of vitamin E and its derivatives in the prevention and the treatment of cancer. Various derivatives of vitamin E are synthesized, which exhibit antiproliferative activity. It has been shown that the α-tocopherol ester with the amino acid lysine exhibits improved antiproliferative activity on MCF-7 breast cancer cell line as compared to commercially available preparations. The first stage was the synthesis of α-tocopherol ester with di-Cbz-lysine. Synthesis of ester was monitored by thin layer chromatography (mobile phase: n-hexane-ethyl acetate 3: 1,2 v/v) and the purification of product was done by dry flash column chromatography and by preparative plate chromatography (mobile phase: n-hexane-ethyl acetate 3: 1,2 v/v). In the second stage, Cbz protecting groups were removed by catalytic hydrogenation. The final product α- tocopheryl-lysine ester was detected by TLC (mobile phase: dichloromethane-methanolammonia 9 : 0,9 : 0,1 v/v)., Vitamin E sačinjavaju dve klase jedinjenja, tokoferoli i tokotrienoli. Dobro je poznata njegova antioksidativna aktivnost, a danas se posebna pažnja obraća na upotrebu vitamina E i njegovih derivata u prevenciji i terapiji kancera. Sintetisani su brojni derivati vitamina E koji ispoljavaju antiproliferativnu aktivnost. Pokazano je da estar α-tokoferola sa aminokiselinom lizinom ispoljava bolju antiproliferativnu aktivnost na MCF-7 ćelijskoj liniji karcinoma dojke u odnosu na komercijalno dostupne preparate. U prvoj fazi sintetisan je estar α-tokoferola sa di- Cbz-lizinom. Tok sinteze estra praćen je metodom tankoslojne hromatografije (mobilna faza: nheksan/ etilacetat 3: 1,2 v/v), dok je prečišćavanje proizvoda izvršeno dry flash hromatografijom i preparativnom hromatografijom na ploči (mobilna faza: n-heksan -etil acetat 3: 1,2 v/v). U drugoj fazi katalitičkom hidrogenacijom uklonjene su zaštitne Cbz-grupe sa amino grupa lizina. Finalni proizvod α-tokoferil lizin estar detektovan je primenom TLC metode (mobilna faza: dihlormetan-metanol-amonijak 9 : 0,9 : 0,1 v/v/v).",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Application of thin layer and column chromatography in monitoring the synthesis of α- tocopheryl-lysine ester, Primena metoda tankoslojne hromatografije i hromatografije na koloni u praćenju sinteze α-tokoferil-lizin estra",
volume = "64",
number = "3",
pages = "261-270",
doi = "10.5937/arhfarm1403261G"
}
Gagić, Ž., Ivković, B., Nikolić, K.,& Agbaba, D.. (2014). Application of thin layer and column chromatography in monitoring the synthesis of α- tocopheryl-lysine ester. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 64(3), 261-270.
https://doi.org/10.5937/arhfarm1403261G
Gagić Ž, Ivković B, Nikolić K, Agbaba D. Application of thin layer and column chromatography in monitoring the synthesis of α- tocopheryl-lysine ester. in Arhiv za farmaciju. 2014;64(3):261-270.
doi:10.5937/arhfarm1403261G .
Gagić, Žarko, Ivković, Branka, Nikolić, Katarina, Agbaba, Danica, "Application of thin layer and column chromatography in monitoring the synthesis of α- tocopheryl-lysine ester" in Arhiv za farmaciju, 64, no. 3 (2014):261-270,
https://doi.org/10.5937/arhfarm1403261G . .