TY  - JOUR
AU  - Isca, Vera M.S.
AU  - Sencanski, Milan
AU  - Filipović, Nenad
AU  - Dos Santos, Daniel J.V.A.
AU  - Cipak-Gasparović, Ana
AU  - Saraiva, Lucilia
AU  - Afonso, Carlos A.M.
AU  - Rijo, Patricia
AU  - Garcia-Sosa, Alfonso T.
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5386
AB  - Plants have been used for centuries to treat several illnesses. The Plectranthus genus has a vast variety of species that has allowed the isolation of cytotoxic compounds with notable activities. The abietane diterpenes 6,7-dehydroroyleanone (DeRoy, 1), 7 alpha -acetoxy-6 beta -hydroxyroyleanone (Roy, 2), and Parvifloron D (ParvD, 3) were obtained from Plectranthus spp. and showed promising biological activities, such as cytotoxicity. The inhibitory effects of the different natural abietanes (1-3) were compared in MFC7, SkBr3, and SUM159 cell lines, as well as SUM159 grown in cancer stem cell-inducing conditions. Based on the royleanones' bioactivity, the derivatives RoyBz (4), RoyBzCl (5), RoyPr(2) (6), and DihydroxyRoy (7), previously obtained from 2, were selected for further studies. Protein kinases C (PKCs) are involved in several carcinogenic processes. Thus, PKCs are potential targets for cancer therapy. To date, the portfolio of available PKC modulators remains very limited due to the difficulty of designing isozyme-selective PKC modulators. As such, molecular docking was used to evaluate royleanones 1-6 as predicted isozyme-selective PKC binders. Subtle changes in the binding site of each PKC isoform change the predicted interaction profiles of the ligands. Subtle changes in royleanone substitution patterns, such as a double substitution only with non-substituted phenyls, or hydroxybenzoate at position four that flips the binding mode of ParvD (3), can increase the predicted interactions in certain PKC subtypes.
PB  - MDPI, BASEL
T2  - International Journal of Molecular Sciences
T1  - Activity to Breast Cancer Cell Lines of Different Malignancy and Predicted Interaction with Protein Kinase C Isoforms of Royleanones
IS  - 10
VL  - 21
DO  - 10.3390/ijms21103671
ER  - 

@article{
author = "Isca, Vera M.S. and Sencanski, Milan and Filipović, Nenad and Dos Santos, Daniel J.V.A. and Cipak-Gasparović, Ana and Saraiva, Lucilia and Afonso, Carlos A.M. and Rijo, Patricia and Garcia-Sosa, Alfonso T.",
year = "2020",
abstract = "Plants have been used for centuries to treat several illnesses. The Plectranthus genus has a vast variety of species that has allowed the isolation of cytotoxic compounds with notable activities. The abietane diterpenes 6,7-dehydroroyleanone (DeRoy, 1), 7 alpha -acetoxy-6 beta -hydroxyroyleanone (Roy, 2), and Parvifloron D (ParvD, 3) were obtained from Plectranthus spp. and showed promising biological activities, such as cytotoxicity. The inhibitory effects of the different natural abietanes (1-3) were compared in MFC7, SkBr3, and SUM159 cell lines, as well as SUM159 grown in cancer stem cell-inducing conditions. Based on the royleanones' bioactivity, the derivatives RoyBz (4), RoyBzCl (5), RoyPr(2) (6), and DihydroxyRoy (7), previously obtained from 2, were selected for further studies. Protein kinases C (PKCs) are involved in several carcinogenic processes. Thus, PKCs are potential targets for cancer therapy. To date, the portfolio of available PKC modulators remains very limited due to the difficulty of designing isozyme-selective PKC modulators. As such, molecular docking was used to evaluate royleanones 1-6 as predicted isozyme-selective PKC binders. Subtle changes in the binding site of each PKC isoform change the predicted interaction profiles of the ligands. Subtle changes in royleanone substitution patterns, such as a double substitution only with non-substituted phenyls, or hydroxybenzoate at position four that flips the binding mode of ParvD (3), can increase the predicted interactions in certain PKC subtypes.",
publisher = "MDPI, BASEL",
journal = "International Journal of Molecular Sciences",
title = "Activity to Breast Cancer Cell Lines of Different Malignancy and Predicted Interaction with Protein Kinase C Isoforms of Royleanones",
number = "10",
volume = "21",
doi = "10.3390/ijms21103671"
}

Isca, V. M.S., Sencanski, M., Filipović, N., Dos Santos, D. J.V.A., Cipak-Gasparović, A., Saraiva, L., Afonso, C. A.M., Rijo, P.,& Garcia-Sosa, A. T.. (2020). Activity to Breast Cancer Cell Lines of Different Malignancy and Predicted Interaction with Protein Kinase C Isoforms of Royleanones. in International Journal of Molecular Sciences
MDPI, BASEL., 21(10).
https://doi.org/10.3390/ijms21103671

Isca VM, Sencanski M, Filipović N, Dos Santos DJ, Cipak-Gasparović A, Saraiva L, Afonso CA, Rijo P, Garcia-Sosa AT. Activity to Breast Cancer Cell Lines of Different Malignancy and Predicted Interaction with Protein Kinase C Isoforms of Royleanones. in International Journal of Molecular Sciences. 2020;21(10).
doi:10.3390/ijms21103671 .

Isca, Vera M.S., Sencanski, Milan, Filipović, Nenad, Dos Santos, Daniel J.V.A., Cipak-Gasparović, Ana, Saraiva, Lucilia, Afonso, Carlos A.M., Rijo, Patricia, Garcia-Sosa, Alfonso T., "Activity to Breast Cancer Cell Lines of Different Malignancy and Predicted Interaction with Protein Kinase C Isoforms of Royleanones" in International Journal of Molecular Sciences, 21, no. 10 (2020),
https://doi.org/10.3390/ijms21103671 . .

TY  - JOUR
AU  - Borges, Anabela
AU  - Simoes, Manuel
AU  - Todorović, Tamara R.
AU  - Filipović, Nenad
AU  - Garcia-Sosa, Alfonso T.
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4764
AB  - Pseudomonas aeruginosa is one of the most dreaded human pathogens, because of its intrinsic resistance to a number of commonly used antibiotics and ability to form sessile communities (biofilms). Innovative treatment strategies are required and that can rely on the attenuation of the pathogenicity and virulence traits. The interruption of the mechanisms of intercellular communication in bacteria (quorum sensing) is one of such promising strategies. A cobalt coordination compound (Co(HL)(2)) synthesized from (E)-2-(2-(pyridin-2-ylmethylene) hydrazinyl)-4-(p-tolyl) thiazole (HL) is reported herein for the first time to inhibit P. aeruginosa 3-oxo-C12-HSL-dependent QS system (LasI/LasR system) and underling phenotypes (biofilm formation and virulence factors). Its interactions with a possible target, the transcriptional activator protein complex LasR-3-oxo-C12-HSL, was studied by molecular modeling with the coordination compound ligand having stronger predicted interactions than those of co-crystallized ligand 3-oxo-C12-HSL, as well as known-binder furvina. Transition metal group 9 coordination compounds may be explored in antipathogenic/antibacterial drug design.
PB  - MDPI, BASEL
T2  - Molecules
T1  - Cobalt Complex with Thiazole-Based Ligand as New Pseudomonas aeruginosa Quorum Quencher, Biofilm Inhibitor and Virulence Attenuator
IS  - 6
VL  - 23
DO  - 10.3390/molecules23061385
ER  - 

@article{
author = "Borges, Anabela and Simoes, Manuel and Todorović, Tamara R. and Filipović, Nenad and Garcia-Sosa, Alfonso T.",
year = "2018",
abstract = "Pseudomonas aeruginosa is one of the most dreaded human pathogens, because of its intrinsic resistance to a number of commonly used antibiotics and ability to form sessile communities (biofilms). Innovative treatment strategies are required and that can rely on the attenuation of the pathogenicity and virulence traits. The interruption of the mechanisms of intercellular communication in bacteria (quorum sensing) is one of such promising strategies. A cobalt coordination compound (Co(HL)(2)) synthesized from (E)-2-(2-(pyridin-2-ylmethylene) hydrazinyl)-4-(p-tolyl) thiazole (HL) is reported herein for the first time to inhibit P. aeruginosa 3-oxo-C12-HSL-dependent QS system (LasI/LasR system) and underling phenotypes (biofilm formation and virulence factors). Its interactions with a possible target, the transcriptional activator protein complex LasR-3-oxo-C12-HSL, was studied by molecular modeling with the coordination compound ligand having stronger predicted interactions than those of co-crystallized ligand 3-oxo-C12-HSL, as well as known-binder furvina. Transition metal group 9 coordination compounds may be explored in antipathogenic/antibacterial drug design.",
publisher = "MDPI, BASEL",
journal = "Molecules",
title = "Cobalt Complex with Thiazole-Based Ligand as New Pseudomonas aeruginosa Quorum Quencher, Biofilm Inhibitor and Virulence Attenuator",
number = "6",
volume = "23",
doi = "10.3390/molecules23061385"
}

Borges, A., Simoes, M., Todorović, T. R., Filipović, N.,& Garcia-Sosa, A. T.. (2018). Cobalt Complex with Thiazole-Based Ligand as New Pseudomonas aeruginosa Quorum Quencher, Biofilm Inhibitor and Virulence Attenuator. in Molecules
MDPI, BASEL., 23(6).
https://doi.org/10.3390/molecules23061385

Borges A, Simoes M, Todorović TR, Filipović N, Garcia-Sosa AT. Cobalt Complex with Thiazole-Based Ligand as New Pseudomonas aeruginosa Quorum Quencher, Biofilm Inhibitor and Virulence Attenuator. in Molecules. 2018;23(6).
doi:10.3390/molecules23061385 .

Borges, Anabela, Simoes, Manuel, Todorović, Tamara R., Filipović, Nenad, Garcia-Sosa, Alfonso T., "Cobalt Complex with Thiazole-Based Ligand as New Pseudomonas aeruginosa Quorum Quencher, Biofilm Inhibitor and Virulence Attenuator" in Molecules, 23, no. 6 (2018),
https://doi.org/10.3390/molecules23061385 . .

TY  - JOUR
AU  - Elshaflu, Hana
AU  - Todorović, Tamara R.
AU  - Nikolić, Milan
AU  - Lolić, Aleksandar
AU  - Visnjevac, Aleksandar
AU  - Hagenow, Stefanie
AU  - Padron, Jose M.
AU  - Garcia-Sosa, Alfonso T.
AU  - Djordjević, Ivana S.
AU  - Grubisić, Sonja
AU  - Stark, Holger
AU  - Filipović, Nenad
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4773
AB  - The novel approach in the treatment of complex multifactorial diseases, such as neurodegenerative disorders and cancer, requires a development of efficient multi-targeting oriented drugs. Since oxidative stress significantly contributes to the pathogenesis of cancer and neurodegenerative disorders, potential drug candidates should possess good antioxidant properties Due to promising biological activities shown for structurally related (1,3-thiazol-2-yl)hydrazones, a focused library of 12 structurally related benzylidene-based (1,3-selenazol-2-yl)hydrazones was designed as potential multi-targeting compounds. Monoamine oxidases (MAO) A/B inhibition properties of this class of compounds have been investigated. Surprisingly, the p-nitrophenyl-substituted (1,3-selenazol-2-yl)hydrazone 4 showed MAO B inhibition in a nanomolar concentration range (IC50 = 73 nM). Excellent antioxidant properties were confirmed in a number of different in vitro assays. Antiproliferative activity screening on a panel of six human solid tumor cell lines showed that potencies of some of the investigated compounds was comparable or even better than that of the positive control 5-fluorouracil. In-silico calculations of ADME properties pointed to promising good pharmacokinetic profiles of investigated compounds. Docking studies suggest that some compounds, compared to positive controls, have the ability to strongly interact with targets relevant to cancer such as 5'-nucleotidase, and to neurodegenerative diseases such as the small conductance calcium-activated potassium channel protein 1, in addition to confirmation of inhibitory binding at MAO B.
PB  - Frontiers Media Sa, Lausanne
T2  - Frontiers in Chemistry
T1  - Selenazolyl-hydrazones as Novel Selective MAO Inhibitors With Antiproliferative and Antioxidant Activities: Experimental and In-silico Studies
VL  - 6
DO  - 10.3389/fchem.2018.00247
ER  - 

@article{
author = "Elshaflu, Hana and Todorović, Tamara R. and Nikolić, Milan and Lolić, Aleksandar and Visnjevac, Aleksandar and Hagenow, Stefanie and Padron, Jose M. and Garcia-Sosa, Alfonso T. and Djordjević, Ivana S. and Grubisić, Sonja and Stark, Holger and Filipović, Nenad",
year = "2018",
abstract = "The novel approach in the treatment of complex multifactorial diseases, such as neurodegenerative disorders and cancer, requires a development of efficient multi-targeting oriented drugs. Since oxidative stress significantly contributes to the pathogenesis of cancer and neurodegenerative disorders, potential drug candidates should possess good antioxidant properties Due to promising biological activities shown for structurally related (1,3-thiazol-2-yl)hydrazones, a focused library of 12 structurally related benzylidene-based (1,3-selenazol-2-yl)hydrazones was designed as potential multi-targeting compounds. Monoamine oxidases (MAO) A/B inhibition properties of this class of compounds have been investigated. Surprisingly, the p-nitrophenyl-substituted (1,3-selenazol-2-yl)hydrazone 4 showed MAO B inhibition in a nanomolar concentration range (IC50 = 73 nM). Excellent antioxidant properties were confirmed in a number of different in vitro assays. Antiproliferative activity screening on a panel of six human solid tumor cell lines showed that potencies of some of the investigated compounds was comparable or even better than that of the positive control 5-fluorouracil. In-silico calculations of ADME properties pointed to promising good pharmacokinetic profiles of investigated compounds. Docking studies suggest that some compounds, compared to positive controls, have the ability to strongly interact with targets relevant to cancer such as 5'-nucleotidase, and to neurodegenerative diseases such as the small conductance calcium-activated potassium channel protein 1, in addition to confirmation of inhibitory binding at MAO B.",
publisher = "Frontiers Media Sa, Lausanne",
journal = "Frontiers in Chemistry",
title = "Selenazolyl-hydrazones as Novel Selective MAO Inhibitors With Antiproliferative and Antioxidant Activities: Experimental and In-silico Studies",
volume = "6",
doi = "10.3389/fchem.2018.00247"
}

Elshaflu, H., Todorović, T. R., Nikolić, M., Lolić, A., Visnjevac, A., Hagenow, S., Padron, J. M., Garcia-Sosa, A. T., Djordjević, I. S., Grubisić, S., Stark, H.,& Filipović, N.. (2018). Selenazolyl-hydrazones as Novel Selective MAO Inhibitors With Antiproliferative and Antioxidant Activities: Experimental and In-silico Studies. in Frontiers in Chemistry
Frontiers Media Sa, Lausanne., 6.
https://doi.org/10.3389/fchem.2018.00247

Elshaflu H, Todorović TR, Nikolić M, Lolić A, Visnjevac A, Hagenow S, Padron JM, Garcia-Sosa AT, Djordjević IS, Grubisić S, Stark H, Filipović N. Selenazolyl-hydrazones as Novel Selective MAO Inhibitors With Antiproliferative and Antioxidant Activities: Experimental and In-silico Studies. in Frontiers in Chemistry. 2018;6.
doi:10.3389/fchem.2018.00247 .

Elshaflu, Hana, Todorović, Tamara R., Nikolić, Milan, Lolić, Aleksandar, Visnjevac, Aleksandar, Hagenow, Stefanie, Padron, Jose M., Garcia-Sosa, Alfonso T., Djordjević, Ivana S., Grubisić, Sonja, Stark, Holger, Filipović, Nenad, "Selenazolyl-hydrazones as Novel Selective MAO Inhibitors With Antiproliferative and Antioxidant Activities: Experimental and In-silico Studies" in Frontiers in Chemistry, 6 (2018),
https://doi.org/10.3389/fchem.2018.00247 . .