41 results on '"Božić Bojan Đ."'
Search Results
2. Solvent effects on the absorption spectra of potentially pharmacologically active 5-alkyl-5-arylhydantoins: A structure-property relationship study
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Hmuda Sleem F., Banjac Nebojša R., Trišović Nemanja P., Božić Bojan Đ., Valentić Nataša V., and Ušćumlić Gordana S.
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hydantoin derivatives ,Kamlet-Taft Equation ,human intestinal absorption ,lipophilicity ,binding affinity ,Chemistry ,QD1-999 - Abstract
To obtain an insight into the interactions of potential anticonvulsant drugs with their surrounding, two series of 5-methyl-5-aryl- and 5-ethyl-5-arylhydantoins were synthesized and their absorption spectra were recorded in the region from 200 to 400 nm in a set of selected solvents. The effects of solvent dipolarity/polarizability and solvent-solute hydrogen bonding interactions on the absorption maxima shifts were analyzed by means of the linear solvation energy relationship (LSER) concept of Kamlet and Taft. The ratio of the contributions of specific and nonspecific solvent-solute interactions were correlated with the corresponding ADME properties of the studied compounds. The correlation equations were combined with different physicochemical parameters to generate new equations, which demonstrate the reasonable relationships between solvent-solute interactions and the structure-activity parameters. [Projekat Ministarstva nauke Republike Srbije, br. 172013]
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- 2013
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3. Oxaprozin: Synthesis, SAR study, physico-chemical characteristics and pharmacology
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Božić Bojan Đ., Trišović Nemanja P., Valentić Nataša V., Ušćumlić Gordana S., and Petrović Slobodan D.
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oxaprozin ,properties ,synthesis ,anti-inflammatory activity ,inhibition of cyclooxygenases ,pharmacokinetics ,arthritis ,Chemical technology ,TP1-1185 - Abstract
Oxaprozin (3-(4,5-difeniloksazol-2-yl)propanoic acid) is a nonsteroidal anti-inflammatory drug (NSAID) used in the treatment of numerous inflammatory musculoskeletal diseases, including rheumatoid arthritis, osteoarthritis, tendonitis, ankylosing spondylitis and bursitis. It is the first representative member of the diaryl-substituted heterocyclic compounds, which have found clinical use as selective cyclooxygenase-2 (COX-2) inhibitors. U.S. Food and Drug Administration (FDA) approved its official use in 1992. Both anti-inflammatory and analgesic properties of oxaprozin are mainly due to the potent inhibition of COX. However, oxaprozin-induced benefits might be also regulated by other COX-independent pathways. It has been shown that oxaprozin induced direct proapoptotic effects in CD40L-treated human monocytes independently of COX inhibition. It also has several advantages in the treatment of inflammatory diseases in comparison to other NSAIDs such as aspirin, naproxen, indomethacin and phenylbutazone, which enabled oxaprozin to become one of the most used NSAIDs in America. Oxaprozin, as other members of the group of NSAIDs, can cause gastrointestinal complications, but significantly lower due to relatively high pKa value. In this paper, importance of oxaprozin in the treatment of arthritis and its pharmacokinetic properties were described, therewith its activity and side effects were compared with other commercially available anti-inflammatory drugs.
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- 2011
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4. Improvement of theoretical UV–Vis spectra calculations by empirical solvatochromic parameters: Case study of 5-arylazo-3-cyano-1-ethyl-6-hydroxy-4-methyl-2-pyridones
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Lađarević, Jelena M., Božić, Bojan Đ., Vitnik, Vesna D., Matović, Luka R., Mijin, Dušan Ž., and Vitnik, Željko J.
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- 2022
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5. Absorption and fluorescence spectral properties of azo dyes based on 3-amido-6-hydroxy-4-methyl-2-pyridone: Solvent and substituent effects
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Porobić, Slavica J., Božić, Bojan Đ., Dramićanin, Miroslav D., Vitnik, Vesna, Vitnik, Željko, Marinović-Cincović, Milena, and Mijin, Dušan Ž.
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- 2020
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6. Synthesis, antimicrobial activity and quantum chemical investigation of novel succinimide derivatives
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Cvetković, Jelena Petković, Božić, Bojan Đ., Banjac, Nebojša R., Petrović, Jovana, Soković, Marina, Vitnik, Vesna D., Vitnik, Željko J., Ušćumlić, Gordana S., and Valentić, Nataša V.
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- 2019
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7. Synthesis, structural characterization, DFT calculations and antiproliferative evaluation of novel spirohydantoin derivatives containing a substituted benzyl moiety
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Lazić, Anita M., Radovanović, Lidija D., Božić, Bojan Đ., Božić Nedeljković, Biljana Đ., Vitnik, Vesna D., Vitnik, Željko J., Rogan, Jelena R., Valentić, Nataša V., Ušćumlić, Gordana S., and Trišović, Nemanja P.
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- 2019
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8. Experimental and theoretical study on the structure-property relationship of novel 1-aryl-3-methylsuccinimides
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Banjac, Nebojša R., Božić, Bojan Đ., Mirković, Jelena M., Vitnik, Vesna D., Vitnik, Željko J., Valentić, Nataša V., and Ušćumlić, Gordana S.
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- 2017
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9. Structure-property relationship of 3-(4-substituted benzyl)-1,3-diazaspiro[4.4]nonane-2,4-diones as new potentional anticonvulsant agents. An experimental and theoretical study
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Lazić, Anita M., Božić, Bojan Đ., Vitnik, Vesna D., Vitnik, Željko J., Rogan, Jelena R., Radovanović, Lidija D., Valentić, Nataša V., and Ušćumlić, Gordana S.
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- 2017
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10. Solvent and structural effects on the spectral shifts of 5-(substituted phenylazo)-3-cyano-6-hydroxy-1-(2-hydroxyethyl)-4-methyl-2-pyridones
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Mirković, Jelena M., Božić, Bojan Đ., Mutavdžić, Dragosav R., Ušćumlić, Gordana S., and Mijin, Dušan Ž.
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- 2014
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11. Synthesis, structure and solvatochromic properties of novel dyes derived from 4-(4-nitrophenyl)-3-cyano-2-pyridone
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Božić, Bojan Đ., Alimmari, Adel S., Mijin, Dušan Ž., Valentić, Nataša V., and Ušćumlić, Gordana S.
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- 2014
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12. Computational and spectroscopic data correlation study of N,N'-bisarylmalonamides (Part II)
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Arsovski, Violeta M., Božić, Bojan Đ., Mirković, Jelena M., Vitnik, Vesna D., Vitnik, Željko J., Petrović, Slobodan D., Ušćumlić, Gordana S., and Mijin, Dušan Ž.
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- 2015
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13. Evaluation of poly(hydroxyethyl acrylate/itaconic acid) hydrogels for controlled delivery of transition metal complexes with Oxaprozin as potential antiproliferative agents
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Babić, Marija M., Božić, Bojan Đ., Božić, Biljana Đ., Filipović, Jovanka M., Ušćumlić, Gordana S., and Tomić, Simonida Lj.
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- 2015
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14. Oxaprozin/poly(2-hydroxyethyl acrylate/itaconic acid) hydrogels: morphological, thermal, swelling, drug release and antibacterial properties
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Babić, Marija M., Antić, Katarina M., Vuković, Jovana S. Jovašević, Božić, Bojan Đ., Davidović, Sladjana Z., Filipović, Jovanka M., and Tomić, Simonida Lj.
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- 2015
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15. Spectroscopic and quantum mechanical investigation of N,N′-bisarylmalonamides: solvent and structural effects
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Arsovski, Violeta M., Božić, Bojan Đ., Mirković, Jelena M., Vitnik, Vesna D., Vitnik, Željko J., Fabian, Walter M. F., Petrović, Slobodan D., and Mijin, Dušan Ž.
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- 2014
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16. The Influence of Seasonality on Secondary Metabolite Profiles and Neuroprotective Activities of Moss Hypnum cupressiforme Extracts: In Vitro and In Silico Study
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Lunić, Tanja M., primary, Mandić, Marija R., additional, Oalđe Pavlović, Mariana M., additional, Sabovljević, Aneta D., additional, Sabovljević, Marko S., additional, Božić Nedeljković, Biljana Đ., additional, and Božić, Bojan Đ., additional
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- 2022
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17. Solvent and Structural Effects on the UV–Vis Absorption Spectra of Some 4,6-Disubstituted-3-Cyano-2-Pyridones
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Alimmari, Adel S. A., Božić, Bojan Đ., Marinković, Aleksandar D., Mijin, Dušan Ž., and Ušćumlić, Gordana S.
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- 2012
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18. Молекуларни механизми антитуморске активности новосинтетисаних 3-супституисаних-5-изопропил-5-фенилхидантоина
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Božić, Biljana, Ognjanović, Branka, Matić, Miloš, Božić, Bojan Đ., Marinković, Emilija, Obradović, Ana, Božić, Biljana, Ognjanović, Branka, Matić, Miloš, Božić, Bojan Đ., Marinković, Emilija, and Obradović, Ana
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Колоректални тумор је један од три најчешћа типа тумора у западној хемисфери и представља водећи узрок смрти изазван тумором у целини. До 20% пацијената има метастатску дисеминацију, најчешће у јетри. Операција би могла бити ефикасан третман само за одабране пацијенте, док су зрачење и помоћна хемотерапија и даље доминантна препоручена терапија за пацијенте са колоректалним тумором који имају метастазе на лимфним чворовима. Тумор дојке је најчешћи тип тумора и други водећи узрок смрти повезаних са тумором код жена широм света, што резултира са више од пола милиона смрти сваке године. Упркос широкој употреби мултимодалних хемотерапија, ниво смртности остаје висок, што наглашава потребу за новим терапијским приступима са већом ефикасношћу против малигних ћелија и напредном селективношћу према здравим ткивима. Хидантоин (имидазолидин-2,4-дион) и његови бројни деривати су једињења која се користе за клиничко лечење напада, епилепсије и срчане аритмије. Различита биолошка и фармаколошка својства, деривата хидантоина омогућила су им додатну примену као антимикробна, фунгицидна и хербицидна средства, такође испољавајући значајна противупална, хиполипидемична, антихипертензивна и антитуморска дејства. Нове физиолошке улоге хидантоина и његових деривата описане су у бројним истраживањима и данас су предмет многих студија. Хидантоин и његови новосинтетисани деривати су у фокусу нових студија због бројних биолошких активности и новонасталих корисних ефеката у различитим патолошким стањима, укључујући тумор. Циљ ове студије био је проценити могуће антитуморске механизме низа синтетисаних деривата 3-(4-супституисаних бензил)-5-изопропил-5-фенилхидантоина на различитим аспектима ћелијске физиологије код ћелијских линија тумора дебелог црева, HCT-116 и тумора дојке, MDA-MB-231. Ћелије су третиране растућим концентрацијама деривата хидантоина (0,01 μМ до 100 μМ) током 24, 48 и 72 сата, након чега је извршена процена степена пролиферације, присуства апоптозе, анализа ћелијског циклу, Colorectal cancer is one of the three most common cancer types in the Western Hemisphere and represents a leading cause of death induced by cancer overall. Up to 20% of patients experience metastatic dissemination, most commonly to the liver. The surgery could be effective treatment only for selected patients, while the radiation and adjuvant chemotherapy remain the dominant recommended therapies for colorectal cancer patients with lymph node metastases. Breast cancer is the most common cancer type and the second leading cause of cancer-related deaths in women across the world resulting in more than half a million deaths each year. Despite the extensive use of multimodal chemotherapies, the level of mortality remains high, emphasizing the need for novel therapeutic approaches with higher efficiency against malignant cells and advanced selectivity towards healthy tissues. Hydantoin (imidazolidine-2,4-dione) and its numerous derivatives are compounds widely used for clinical treatment of seizures, epilepsy, and cardiac arrhythmias. Possessing various biological and pharmacological properties, hydantoin derivatives gained additional applications as anti-microbial, fungicidal, and herbicidal agents, also expressing significant anti-inflammatory, hypolipidemic, antihypertensive, and antitumor activities. Novel physiological roles of hydantoin and its derivatives emerged in numerous studies are yet to be fully understood. Hydantoin and its newly synthesized derivatives have recently become a focus of interest due to their numerous biological activities and newly emerging beneficial effects in different pathological conditions, including cancer. The aim of this study was to evaluate the possible antitumor mechanisms of series of newly synthesized 3-(4-substituted benzyl)-5-isopropyl-5-phenylhydantoin derivatives on different aspects of cell physiology of human colon cancer cell line, HCT-116 and human breast cancer cell line MDA-MB-231. The increasing concentrations of der
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- 2020
19. Absorption and fluorescence spectral properties of azo dyes based on 3-amido-6-hydroxy-4-methyl-2-pyridone: Solvent and substituent effects
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Porobić, Slavica, Božić, Bojan Đ., Dramićanin, Miroslav, Vitnik, Vesna, Vitnik, Željko J., Marinović-Cincović, Milena, Mijin, Dušan Ž., Porobić, Slavica, Božić, Bojan Đ., Dramićanin, Miroslav, Vitnik, Vesna, Vitnik, Željko J., Marinović-Cincović, Milena, and Mijin, Dušan Ž.
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A series of nine 5-(4-substituted phenylazo)-3-amido-6-hydroxy-4-methyl-2-pyridones were synthesized and characterized by FT–IR, 1H and 13C NMR, UV–Vis, and PL spectroscopy. Photophysical properties of the dyes were examined in solvents of various polarities and at different pH values. The solvent effects on the absorbance and emission spectral shift were analyzed using Lippert–Mataga, Reichardt–Dimroth and Kamlet-Taft equations. Moreover, UV–Vis absorption and emission frequencies were correlated with Hammett substituent constants applying the linear free energy relationships. DFT calculations of the investigated dyes were accomplished to determine their structural and electronic properties. © 2019
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- 2020
20. The innovative combined microwave-assisted and photo-polymerization technique for synthesis of the novel degradable hydroxyethyl (meth)acrylate/gelatin based scaffolds
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Babić, Marija M., Božić, Bojan Đ., Božić, Biljana Đ., Ušćumlić, Gordana S., and Tomić, Simonida Lj.
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- 2018
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21. Design and In Vitro Biological Evaluation of a Novel Organotin(IV) Complex with 1-(4-Carboxyphenyl)-3-ethyl-3-methylpyrrolidine-2,5-dione
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Pantelić, Nebojša Đ., primary, Zmejkovski, Bojana B., additional, Žižak, Željko, additional, Banjac, Nebojša R., additional, Božić, Bojan Đ., additional, Stanojković, Tatjana P., additional, and Kaluđerović, Goran N., additional
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- 2019
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22. Evaluation of novel antiproliferative controlled drug delivery system based on poly(2-hydroxypropyl acrylate/itaconic acid) hydrogels and nickel complex with Oxaprozin
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Babić, Marija M., Božić, Bojan Đ., Božić, Biljana Đ., Filipović, Jovanka M., Ušćumlić, Gordana S., and Tomić, Simonida Lj.
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- 2016
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23. Design of novel multifunctional Oxaprozin delivery system based on dual-sensitive poly(2-hydroxypropyl acrylate/itaconic acid) hydrogels
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Babić, Marija M., Božić, Bojan Đ., Antić, Katarina M., Jovašević Vuković, Jovana S., Perišić, Marija D., Filipović, Jovanka M., and Tomić, Simonida Lj.
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- 2015
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24. Transition from Low to High Iodide and Iodine Concentration States in the Briggs–Rauscher Reaction: Evidence on Crazy Clock Behavior
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Pagnacco, Maja C., primary, Maksimović, Jelena P., additional, Potkonjak, Nebojša I., additional, Božić, Bojan Đ., additional, and Horváth, Attila K., additional
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- 2018
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25. Experimental and theoretical insight into the electronic properties of 4‐aryl‐5‐arylazo‐3‐cyano‐6‐hydroxy‐2‐pyridone dyes
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Vitnik, Vesna D., primary, Vitnik, Željko J., additional, Božić, Bojan Đ., additional, Valentić, Nataša V., additional, Dilber, Sanda P., additional, Mijin, Dušan Ž., additional, and Ušćumlić, Gordana S., additional
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- 2017
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26. Eksperimentalna i kvantno-hemijska proučavanja hinolonskih azo boja i njihovih prekursora
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Mijin, Dušan, Ušćumlić, Gordana S., Vitnik, Željko J., Petrović, Slobodan D., Božić, Bojan Đ., Arsovski, Violeta M., Mijin, Dušan, Ušćumlić, Gordana S., Vitnik, Željko J., Petrović, Slobodan D., Božić, Bojan Đ., and Arsovski, Violeta M.
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Predmet istraživanja ove doktorske disertacije bila je eksperimentalna i teorijska analiza strukture hinolonskih azo boja i njihovih prekursora. U okviru disertacije, izvršena je sinteza azo boja kod kojih je ulogu kuplujuće komponente imao 4-hidroksi- -2-hinolon, dok je diazo komponenta bila odgovarajući p-supstituisan anilin. Najpre je izvršena sinteza serije N,N’-bisarilmalonamida (prekursora hinolona) čija je detaljna analiza (eksperimentalna i teorijska) dala odgovore u vezi sa geometrijom i reaktivnošću ispitivanih prekursora. Proučavan je uticaj supstituenata fenilnog jezgra, na azo-hidrazon tautomeriju u rastvorima (kod azo boja), kao i na geometriju i reaktivnost prekursora (kod N,N’-bisarilmalonamida). Takođe, proučavan je uticaj i rastvarača na formiranje intra- i intermolekulske vodonične veze kod N,N’-bisarilmalonamida. Izvršena je analiza uticaja rastvarača na apsorpcione spektre ispitivanih jedinjenja primenom linearne korelacije energije solvatacije (LSER) uz korišćenje Kamlet-Taftove (Kamlet-Taft) i Katalanove (Catalán) jednačine. Urađena je i optimizacija geometrije ispitivanih jedinjenja i proučeno je prenošenje elektronskih efekata primenom kvantno-hemijskih proračuna (DFT). Sva jedinjenja sintetisana su prema originalnim ili modifikovanim metodama iz literature. Jedinjenja su okarakterisana temperaturama topljenja, UV-Vis, FT-IR, 1H i 13C NMR spektrima i elementarnom analizom. Na osnovu spektralnih podataka utvrđena je struktura tautomernih oblika boja. UV-Vis apsorpcioni maksimumi određeni su u različitim rastvaračima (spektroskopske čistoće). Uticaj supstituenata na prenošenje elektronskih efekata kod N,N’-bisarilmalonamida ispitan je primenom jednoparametarske i dvoparametarske Hametove (Hammett) jednačine, kao i primenom Svain-Luptonove (Swain-Lupton) jednačine. Rezultati dobijeni UV-spektroskopskim merenjima (kod N,N'-bisarilmalonamida) pokazuju, da na položaj UV-apsorpcionih frekvencija mnogo više utiče prisutni supstituent na fenilnom prs, Subject of this doctoral dissertation is the experimental and theoretical analysis of quinolone azo dyes and their precursors structure. Within the theses, the synthesis of azo dyes in which the role of the coupling components had the 4-hydroxy-2-quinolone while the diazo component was the corresponding p-substituted aniline, was carried out. First the synthesis of a series of N,N'-bisarylmalonamides (precursor) was performed. In-depth analysis (experimental and theoretical) of the prepared amides afforded the answers regarding the geometry and the reactivity of the tested precursors. The impact of the nature of the substituents on the phenyl nucleus, on the azo-hydrazone tautomerism in solution (with azo dyes), as well as the geometry and the reactivity of the precursor (N,N'-bisarilmalonamida) was studied. Also, the influence of solvents on the azo-hydrazone tautomerism of azo dyes as well as the solvent effect on the formation of intra- and intermolecular hydrogen bonds in N,N'-bisarylmalonamides was investigated. The analysis was performed using linear correlation free energy of solvation (LSER) using Kamlet-Taft and Catalan equations. Has been done the optimization of the tested compounds and examined the transmission of electronic effects of the application of quantum-chemical calculations (DFT). All compounds were synthesized according to the original or modified methods from the literature. The compounds were characterized by melting point, UV-Vis, FT-IR, 1H and 13C NMR spectra and elemental analysis. Determination of UV-Vis absorption maximum in a variety of solvents (spectroscopic grade) was carried out using a UV-Vis spectrophotometer. The effect of substituents on the transmission of electronic effects in N,N’-bisarylmalonamides was tested using simple and extended Hammett equations, as well as by Swain-Lupton equation. The results obtained by UV spectroscopic measurements (the N,N'-bisarilmalonamida) shows that the position of a UV absorption frequency
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- 2017
27. Sinteza, struktura i svojstva 7,8-benzo-1,3-diazaspiro[4.5]dekan-2,4-diona i njegovih derivata
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Mandić, Željko, Lazić, Anita M., Božić, Bojan Đ., Ušćumlić, Gordana S., Mandić, Željko, Lazić, Anita M., Božić, Bojan Đ., and Ušćumlić, Gordana S.
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Derivati tetrantoina (7,8-benzo-1,3-diazaspiro[4.5]dekan-2,4-diona) (Slika ) su jedinjenja širokog spektra biološke aktivnosti. Mnogi od njih su poznata antikonvulzivna, antivirusna i antikancerogena jedinjenja, a uspešno se koriste i u lečenju dijabetesa. U okviru ovog rada, sintetizovan je tetrantoin i njegovi derivati koji u položaju 3 hidantoinskog prstena sadrže supstituisanu benzil grupu (supstituent X: H, CH3, OCH3, Cl, Br, CN). Struktura navedenih jedinjenja potvrđena je temperaturama topljenja, 1 H i 13 C NMR, Ft-IR i UV spektroskopskim metodama. Na osnovu strukturnih i lipofilnih karakteristika diskutovana je potencijalna biološka aktivnost sintetizovanih jedinjenja., Derivatives of tetrantoin (7,8-benzo-1,3-diazaspiro[4.5]decane-2,4-dione) (Figure) are the compounds of a wide range of biological activities. Many of them are known anticonvulsant, anticancer and antiviral compounds, and are successfully used in the treatment of diabetes. In this work, was synthesized tetrantoin and its derivatives which in the 3-position of the hydantoin ring containing a substituted benzyl group (the substituent X: H, CH3, OCH3, Cl, Br, CN). The structure of these compounds was confirmed by melting point, 1H and 13C NMR, FT-IR and UV spectroscopic methods. Based on structural lipophilic characteristics is discussed the potential biological activity of the synthesized compounds.
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- 2016
28. Dizajn, sinteza i antiproliferativna aktivnost novih cikloalkanspiro-5-hidantoinskih derivata: Veza između strukture i aktivnosti
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Lazić, Anita M., Božić, Bojan Đ., Božić, Biljana Đ., Ušćumlić, Gordana S., Lazić, Anita M., Božić, Bojan Đ., Božić, Biljana Đ., and Ušćumlić, Gordana S.
- Abstract
Spirohidantoini pripadaju grupi jedinjenja koja ispoljavaju širok spektar biološke aktivnosti. Do sada su derivati spirohidantoina identifikovani kao antikonvulzivi, antiaritmici, antidijabetici i antitumorni agensi. U cilju ispitivanja biološke aktivnosti, testirana je citotoksičnost novih serija jedinjenja: 3-(4-supstituisanih benzil)-1,3-diazaspiro[4.5]dekan-2,4-diona, 3-(2-(4-supstituisanih fenil)-2-oksoetil)-1,3-diazaspiro-[4.5]-dekan-2,4-diona, 3-(4-supstituisanih benzil)-1,3-diazaspiro[4.6]undekan-2,4-diona i 3-(2-(4-supstituisanih fenil)-2-oksoetil)-1,3-diazaspiro[4.6]undekan- -2,4-diona. Citotoksična aktivnost određena je MTT testom prema ćelijskim linijama humane mijeloidne leukemije (K562), raka debelog creva (HCT-116) i raka dojke (MDA-MB-231). Testirana jedinjenja pokazala su značajnu citotoksičnost prema svim ćelijskim linijama, a naročito su se istakli derivati koji u okviru svoje strukture sadrže halogene kao supstituente. Uticaj sternih i elektronskih svojstava supstituenata na aktivnost proučavanih jedinjenja, analiziran je primenom QSAR modela., Spiroydantoins belong to a group of compounds exhibiting a wide range of biological activities. Until now, the spirohydantoin derivatives are identified as anticonvulsants, antiarrhythmic drugs, antidiabetic agents and antitumor agents. In order to investigate the biological activity was tested on the cytotoxicity of the new series of compounds: 3-(4-substituted benzyl)-1,3-diazaspiro[4.5]decane-2,4-dione, 3-(2-(4-substituted phenyl)-2-oxoethyl)-1,3-diazaspiro[4.5]decane2,4-dione, 3-(4-substituted benzyl)-1,3--diazaspiro-[4.6]undecane-2,4-dione and 3-(2-(4-substituted phenyl)-2-oxoethyl)-1,3-diazaspiro[4.6]-undecane-2,4-dione. Cytotoxic activity was assessed by MTT assay cell lines of human myeloid leukemia (K562), colon (HCT-116) and breast cancer cells (MDA-MB-231). The test compounds showed a significant cytotoxicity to all cell lines, and in particular the derivatives containig within its structure halogens as substituents. The effect of steric and electronic properties of the substituents on activity of studed compounds, was analyzed by QSAR models.
- Published
- 2016
29. Sinteza, struktura i svojstva potencijalno biološki aktivnih derivata propanske kiseline
- Author
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Božić, Bojan Đ., Ušćumlić, Gordana, Petrović, Slobodan, and Avramov Ivić, Milka
- Subjects
antiproliferative activity ,oxaprozin ,4-thiazolidinedione ,ciklična voltametrija ,oksaprozin ,cyclic voltammetry ,4-tiazolidindion ,transition metal complexes ,rendgenska strukturna analiza ,propanoic acid derivatives ,derivati propanske kiseline ,antiproliferativna aktivnost ,kompleksi prelaznih metala ,X-ray analysis - Abstract
U cilju proučavanja potencijalne biološke aktivnosti derivata propanske kiseline u ovom radu su sintetisane dve serije jedinjenja. U prvoj seriji, sintetizovani su novi kompleksi prelaznih metala [Mn(II), Co(II), Ni(II), Cu(II), Zn(II)] sa oksaprozinom (Hoxa), nesteroidnim antiinflamatornim lekom. Lek i kompleksi okarakterisani su elementarnom i TG analizom, FT-IC, 1H NMR, 13C NMR, UV-Vis spektroskopijom i merenjem magnetne susceptibilnosti. Na osnovu elektronskih spektara i magnetnih momenata za sve komplekse utvrđena je (pseudo)oktaedarska geometrija. Sa izuzetkom Cu(II)-kompleksa, gde je ustanovljen mostovno bidentatni način vezivanja COO–-grupa, kod svih ostalih kompleksa na osnovu FT-IC spektara potvrđena je helatna koordinacija COO–-grupa. Opšta formula kompleksa je [M(H2O)2(oxa)2]∙xH2O, gde je x = 2 za M = Mn, Co i Ni i x = 1,5 za Zn. Binuklearni Cu(II)-kompleks, [Cu2(H2O)2(OH)(oxa)3]∙2H2O, ispoljava snažne Cu–Cu interakcije antiferomagnetnog tipa. Prvi put je ispitana in vitro antiproliferativna aktivnost sintetizovanih kompleksa prema ćelijskim linijama humanog karcinoma kolona (HCT-116), humanog karcinoma dojke (MDA-231), humanog karcinoma grlića materice (HeLa) i melanoma (Fem-x). Kod svih kompleksa uočen je statistički značajan antiproliferativni efekat. Zbog izuzetne aktivnosti, čak i pri nanomolarnim koncentracijama, Ni(II)-kompleks se pokazao kao potencijalni antiproliferativni agens. Drugu seriju jedinjenja čini grupa novih 2-(5-ariliden-2,4-dioksotetrahidrotiazol- 3-il)propanskih kiselina i odgovarajućih metil estara. Sva jedinjenja okarakterisana su temperaturom topljenja, elementarnom analizom, FT-IC, 1H NMR i 13C NMR spektroskopijom. Kristalna struktura metil-2-(5-(4-metoksifenil)metilen-2,4- -dioksotetrahidrotiazol-3-il)propionata određena je rendgenskom strukturnom analizom. Ispitivana je antiproliferativna aktivnost sintetisanih jedinjenja na ćelijskim linijama humanog karcinoma kolona (HCT-116), humanog karcinoma dojke (MDA-231) i mijeloidne leukemije (K-562). Rezultati ukazuju na bolju antiproliferativnost aktivnost sintetisanih metil estara u odnosu na odgovarajuće kiseline. Dodatno je ispitivana antimikrobna aktivnost, ali nije zabeležen njihov efekat naspram širokog spektra testiranih mikroorganizama. U nastavku istraživanja, urađena je elektrohemijska karakterizacija oksaprozina, cikličnom voltametrijom na elektrodi od zlata u 0,05 M rastvoru NaHCO3. Sintetizovan lek, njegov analitički standard i sadržaj aktivne supstance u tableti Duraprox® okarakterisan je jednom oksidacionom i tri redukcione reakcije. Uočena je linearna zavisnost anodnih struja od koncentracija leka na 0,83 V za analitički standard i na 0,85 V za tabletu Duraprox®. Elektroda od zlata je modifikovana adsorpcijom goveđeg serum albumina (bovine serum albumin, BSA) u 0,1 M fosfatnom puferu (pH = 7,4) i ispitana je koncentraciona zavisnost anodnih struja za analitički standard oksaprozina na BSA/Au elektrodi. Korišćenjem Lengmirove adsorpcione termodinamičke jednačine izračunata je konstanta vezivanja oksaprozina za BSA/Au elektrodu. In order to examine potentially biologically active propanoic acid derivatives two series of compounds have been synthesized. In the first series, novel transition metal [Mn(II), Co(II), Ni(II), Cu(II), Zn(II)] complexes with oxaprozin (Hoxa), a nonsteroidal anti-inflammatory drug, have been synthesized. The drug and complexes have been characterized by elemental and TG analysis, FT-IR, 1H NMR, 13C NMR, UV-Vis spectroscopy and magnetic susceptibility measurements. The (pseudo)octahedral geometry has been proposed for all complexes based on electronic spectra and magnetic moments. With exception of the Cu(II) complex, where bridging bidentate mode of COO– groups has been found, FT-IR spectra confirmed chelately coordinated COO– groups in the other complexes. The general formula of the complexes is [M(H2O)2(oxa)2]∙xH2O, with x = 2 for M = Mn, Co and Ni and x = 1.5 for Zn. The binuclear Cu(II) complex, [Cu2(H2O)2(OH)(oxa)3]∙2H2O, has strong Cu–Cu interactions of antiferromagnetic type. The complexes and Hoxa did not exhibit the cytotoxic effect to peritoneal macrophages. For the first time these complexes have been tested for their in vitro antiproliferative activity against human colon, breast, and cancer cell lines, HCT-116, MDA-231, HeLa and Fem-x, respectively. For all investigated compounds significant antiproliferative effects have been observed. Ni(II) complex has been shown to be a promising antiproliferative agent exerting excellent activity even in nanomolar concentrations. In the second series, novel 2-(5-arylidene-2,4-dioxotetrahydrothiazole-3- -yl)propanoic acids and six corresponding methyl esters have been synthesized. All compounds were characterized by melting points, elemental analysis, FT-IR, 1H and 13C NMR spectroscopy. Crystal structure of methyl-2-(5-(4-methoxybenzylidene)-2,4- -dioxotetrahydrothiazole-3-yl)propionate was confirmed by X-ray analysis. The antiproliferative activity of all synthesized compounds against human colon cancer, breast cancer and myelogenous leukemia cell lines, i.e. HCT-116, MDA-231 and K562, respectively, was evaluated. The results indicate that antiproliferative activity of the synthesized esters is better than the activity of the corresponding acids. Moreover, in vitro antimicrobial activity against a wide range of tested microorganisms was examined and not noticed. Further, electrochemical investigation of oxaprozin, using cyclic voltammetry on gold electrode in 0.05 M NaHCO3 was performed. The synthesized drug, its analytical standard and its content in Duraprox® tablets were characterized with one oxidation reaction and the three reduction reactions. All they exhibited the linear concentration dependency of anodic currents at 0.83 V for the analytical standard and 0.85 V for Duraprox® tablets. The strong adsorption of bovine serum albumin (BSA) on gold electrode in 0.1 M phosphate buffer solution (pH = 7.4) is shown and concentration dependency of anodic currents of oxaprozin standard on BSA/Au is studied. Following the Langmuir adsorption thermodynamic equation, the binding constants of oxaprozin on BSA/Au electrode was calculated.
- Published
- 2013
30. Esterification of Aryl/Alkyl Acids Catalysed by N-bromosuccinimide under Mild Reaction Conditions.
- Author
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Čebular, Klara, Božić, Bojan Đ., and Stavber, Stojan
- Subjects
- *
ESTERIFICATION , *CHEMICAL reactions , *BROMOSUCCINIMIDE , *SUCCINIMIDES , *CATALYSIS - Abstract
N-halosuccinimides (NXSs) are well-known to be convenient, easily manipulable and low-priced halogenation reagents in organic synthesis. In the present work, N-bromosuccinimide (NBS) has been promoted as the most efficient and selective catalyst among the NXSs in the reaction of direct esterification of aryl and alkyl carboxylic acids. Comprehensive esterification of substituted benzoic acids, mono-, di- and tri-carboxy alkyl derivatives has been performed under neat reaction conditions. The method is metal-free, air- and moisture-tolerant, allowing for a simple synthetic and isolation procedure as well as the large-scale synthesis of aromatic and alkyl esters with yields up to 100%. Protocol for the recycling of the catalyst has been proposed. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
31. Еlеctrochemical Characterization of Oxaprozin on Bare Gold Electrode and Electrode Modified with Bovine Serum Albumin
- Author
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Bozic, Bojan D., Avramov Ivic, Milka L., Trisovic, Nemanja P., Petrovic, Slobodan D., and Uscumlic, Gordana S.
- Published
- 2012
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32. Transition from Low to High Iodide and Iodine Concentration States in the Briggs–Rauscher Reaction: Evidence on Crazy Clock Behavior
- Author
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Pagnacco, Maja C., Maksimović, Jelena P., Potkonjak, Nebojša I., Božić, Bojan Đ., and Horváth, Attila K.
- Abstract
The Briggs–Rauscher reaction containing malonic acid may undergo a sudden transition from low (state I) to high iodide and iodine (state II) concentration states after a well-defined and strongly reproducible oscillatory period. This study clearly shows that even though the time-dependent behavior of the oscillatory state is reproducible, the time lag necessary for the appearance of the state I to state II transition after the system leaves the oscillatory state becomes irreproducible for an individual kinetic run. This crazy clock behavior of the state I to state II transition is identified by repeated experiments in which stirring rate is taken as a control parameter and all other parameters such as initial conditions, temperature, vessel surface, and the age of solution were kept constant. Surprisingly, a better stirring condition does not make the transition reproducible; it simply does not allow the transition to happen at all. The proposed mechanism, additional explanations, and proposals for this irreproducibility of state I to state II transition have been presented. Considering the fact that the number of crazy clock reactions is only a few, this study may contribute to a better understanding of fundaments of this phenomenon.
- Published
- 2024
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- View/download PDF
33. Influence of microwave irradiation on hypochlorite decolorisation of synthetic dyes
- Author
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Mijin, Dušan Ž., primary, Dabić, Dunja M., additional, Mirković, Jelena M., additional, Božić, Bojan Đ., additional, and Grgur, Branimir N., additional
- Published
- 2016
- Full Text
- View/download PDF
34. Eksperimentalna i kvantnohemijska proučavanja strukture 3-(4-supstituisanih benzil)-1,3-diazaspiro[4.4]nonan-2,4-diona
- Author
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Lazić, Anita M., Božić, Bojan Đ., Vitnik, Vesna D., Vitnik, Željko J., Valentić, Nataša V., Ušćumlić, Gordana S., Lazić, Anita M., Božić, Bojan Đ., Vitnik, Vesna D., Vitnik, Željko J., Valentić, Nataša V., and Ušćumlić, Gordana S.
- Abstract
U radu je sintetizovana serija 3-(4-supstituisanih benzil)-1,3-diazaspiro4.4nonan-2,4-diona čija je struktura određena temperaturama topljenja, FT-IR, 1H i 13C NMR i UV/Vis spektroskopijom. Uticaj supstituenata na apsorpcione spektre spirohidantoina, u različitim rastvaračima, proučavan je Hametovom jednačinom. Eksperimentalni rezultati su pokazali zadovoljavajuću saglasnost sa rezultatima kvantnohemijskih proračuna dobijenih primenom DFT metode. Pokazano je da supstituenti značajno utiču na intramolekulski transfer naelektrisanja (ICT) kao i na reaktivnost proučavanih hidantoina razmatranu na osnovu molekulskog elektrostatičkog potencijala (MEP)., In this work, a series of 3(4-substituted benzyl)-1,3-diazaspiro4.4nonane-2,4-dione was synthesized and fully characterized by melting points, FT-IR, 1H, and 13C NMR and UV/Vis spectroscopy. The Hammett equation was used to quantitatively evaluate the effects of substituents on the absorption frequencies in different solvents. The experimental results showed very good agreement with quantum chemical calculations obtained using DFT method. It was shown that substituents change the extent of conjugation, and affect intramolecular charge transfer (ICT) character. To estimate chemical reactivity of the molecules, the molecular electrostatic potential (MEP) surface maps were calculated for the optimized geometries of the investigated molecules.
- Published
- 2015
35. Sinteza, struktura i svojstva novih 3-(supstituisanih benzil)-5,5'-cikloalkan spirohidantoina
- Author
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Lazić, Anita M., Božić, Bojan Đ., Trišović, Nemanja P., Valentić, Nataša V., Ušćumlić, Gordana S., Lazić, Anita M., Božić, Bojan Đ., Trišović, Nemanja P., Valentić, Nataša V., and Ušćumlić, Gordana S.
- Abstract
U radu je sintetizovano dvadeset novih 3-(supstituisanih benzil)-5,5'-cikloalkan-spirohidantoina čija je struktura određena temperaturama toplenja, FT-IR, 1H i 13C NMR i UV spektroskopijom. Solvatohromizam ovih jedinjenja je proučavan metodom linearne korelacije energija solvatacije. Kvantitativna procena uticaja rastvarača na pomeranje apsorbcionih maksimuma je nedvosmisleno ukazala na vezu između lipofilnosti i relevantnih farmakoloških karakteristika proučavanih jedinjenja sa njihovim proton-akceptorskim svojstvima., In this work twenty novel 3-(substituted benzyl)-5,5'-cycloalkanespirohydantoins have been synthesized and fully characterized by melting point, FT-IR, 1H and 13C NMR and UV spectroscopy. Solvatochromism of these compounds have been analysed by means of linear solvation energy relationships (LSER) concept. The quantitative relationships beetwen hydrogen bonding interaction and the correspodenting pharmacologically relevant propereties of the studied compounds have been discussed.
- Published
- 2014
36. Oxaprozin/poly(2-hydroxyethyl acrylate/itaconic acid) hydrogels: morphological, thermal, swelling, drug release and antibacterial properties
- Author
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Babić, Marija M., primary, Antić, Katarina M., additional, Vuković, Jovana S. Jovašević, additional, Božić, Bojan Đ., additional, Davidović, Sladjana Z., additional, Filipović, Jovanka M., additional, and Tomić, Simonida Lj., additional
- Published
- 2014
- Full Text
- View/download PDF
37. Sinteza, struktura i svojstva potencijalno biološki aktivnih derivata propanske kiseline
- Author
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Ušćumlić, Gordana, Petrović, Slobodan, Avramov Ivić, Milka, Božić, Bojan Đ., Ušćumlić, Gordana, Petrović, Slobodan, Avramov Ivić, Milka, and Božić, Bojan Đ.
- Abstract
U cilju proučavanja potencijalne biološke aktivnosti derivata propanske kiseline u ovom radu su sintetisane dve serije jedinjenja. U prvoj seriji, sintetizovani su novi kompleksi prelaznih metala [Mn(II), Co(II), Ni(II), Cu(II), Zn(II)] sa oksaprozinom (Hoxa), nesteroidnim antiinflamatornim lekom. Lek i kompleksi okarakterisani su elementarnom i TG analizom, FT-IC, 1H NMR, 13C NMR, UV-Vis spektroskopijom i merenjem magnetne susceptibilnosti. Na osnovu elektronskih spektara i magnetnih momenata za sve komplekse utvrđena je (pseudo)oktaedarska geometrija. Sa izuzetkom Cu(II)-kompleksa, gde je ustanovljen mostovno bidentatni način vezivanja COO–-grupa, kod svih ostalih kompleksa na osnovu FT-IC spektara potvrđena je helatna koordinacija COO–-grupa. Opšta formula kompleksa je [M(H2O)2(oxa)2]∙xH2O, gde je x = 2 za M = Mn, Co i Ni i x = 1,5 za Zn. Binuklearni Cu(II)-kompleks, [Cu2(H2O)2(OH)(oxa)3]∙2H2O, ispoljava snažne Cu–Cu interakcije antiferomagnetnog tipa. Prvi put je ispitana in vitro antiproliferativna aktivnost sintetizovanih kompleksa prema ćelijskim linijama humanog karcinoma kolona (HCT-116), humanog karcinoma dojke (MDA-231), humanog karcinoma grlića materice (HeLa) i melanoma (Fem-x). Kod svih kompleksa uočen je statistički značajan antiproliferativni efekat. Zbog izuzetne aktivnosti, čak i pri nanomolarnim koncentracijama, Ni(II)-kompleks se pokazao kao potencijalni antiproliferativni agens. Drugu seriju jedinjenja čini grupa novih 2-(5-ariliden-2,4-dioksotetrahidrotiazol- 3-il)propanskih kiselina i odgovarajućih metil estara. Sva jedinjenja okarakterisana su temperaturom topljenja, elementarnom analizom, FT-IC, 1H NMR i 13C NMR spektroskopijom. Kristalna struktura metil-2-(5-(4-metoksifenil)metilen-2,4- -dioksotetrahidrotiazol-3-il)propionata određena je rendgenskom strukturnom analizom. Ispitivana je antiproliferativna aktivnost sintetisanih jedinjenja na ćelijskim linijama humanog karcinoma kolona (HCT-116), humanog karcinoma dojke (MDA-231) i mijeloidne, In order to examine potentially biologically active propanoic acid derivatives two series of compounds have been synthesized. In the first series, novel transition metal [Mn(II), Co(II), Ni(II), Cu(II), Zn(II)] complexes with oxaprozin (Hoxa), a nonsteroidal anti-inflammatory drug, have been synthesized. The drug and complexes have been characterized by elemental and TG analysis, FT-IR, 1H NMR, 13C NMR, UV-Vis spectroscopy and magnetic susceptibility measurements. The (pseudo)octahedral geometry has been proposed for all complexes based on electronic spectra and magnetic moments. With exception of the Cu(II) complex, where bridging bidentate mode of COO– groups has been found, FT-IR spectra confirmed chelately coordinated COO– groups in the other complexes. The general formula of the complexes is [M(H2O)2(oxa)2]∙xH2O, with x = 2 for M = Mn, Co and Ni and x = 1.5 for Zn. The binuclear Cu(II) complex, [Cu2(H2O)2(OH)(oxa)3]∙2H2O, has strong Cu–Cu interactions of antiferromagnetic type. The complexes and Hoxa did not exhibit the cytotoxic effect to peritoneal macrophages. For the first time these complexes have been tested for their in vitro antiproliferative activity against human colon, breast, and cancer cell lines, HCT-116, MDA-231, HeLa and Fem-x, respectively. For all investigated compounds significant antiproliferative effects have been observed. Ni(II) complex has been shown to be a promising antiproliferative agent exerting excellent activity even in nanomolar concentrations. In the second series, novel 2-(5-arylidene-2,4-dioxotetrahydrothiazole-3- -yl)propanoic acids and six corresponding methyl esters have been synthesized. All compounds were characterized by melting points, elemental analysis, FT-IR, 1H and 13C NMR spectroscopy. Crystal structure of methyl-2-(5-(4-methoxybenzylidene)-2,4- -dioxotetrahydrothiazole-3-yl)propionate was confirmed by X-ray analysis. The antiproliferative activity of all synthesized compounds against human colon cancer, breast can
- Published
- 2013
38. 1,3-Dibromo-5,5-dimethylhydantoin as a Precatalyst for Activation of Carbonyl Functionality.
- Author
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Čebular, Klara, Božić, Bojan Đ., and Stavber, Stojan
- Subjects
- *
ALDOL condensation , *CONDENSATION reactions , *CARBONYL group , *ORGANIC synthesis , *ESTERIFICATION , *CARBOXYLIC acids - Abstract
Activation of carbonyl moiety is one of the most rudimentary approaches in organic synthesis and is crucial for a plethora of industrial-scale condensation reactions. In esterification and aldol condensation, which represent two of the most important reactions, the susceptibility of the carbonyl group to nucleophile attack allows the construction of a variety of useful organic compounds. In this context, there is a constant need for development of and improvement in the methods for addition-elimination reactions via activation of carbonyl functionality. In this paper, an advanced methodology for the direct esterification of carboxylic acids and alcohols, and for aldol condensation of aldehydes using widely available, inexpensive, and metal-free 1,3-dibromo-5,5-dimethylhydantoin under neat reaction conditions is reported. The method is air- and moisture-tolerant, allowing simple synthetic and isolation procedures for both reactions presented in this paper. The reaction pathway for esterification is proposed and a scale-up of certain industrially important derivatives is performed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
39. Investigation of the immunomodulatory potential of moss extracts Hypnum cupressiforme Hedw
- Author
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Lunić, Tanja, Božić Nedeljković, Biljana, Božić, Bojan Đ., Sabovljević, Aneta, Sabovljević, Marko, and Rajilić-Stojanović, Mirjana
- Subjects
Hypnum cupressiforme Hedw ,екстракт маховине ,хемијска карактеризација ,антиоксидативна и анти-инфламаторна активност ,имуномодулација ,молекулски докинг ,moss extract ,chemical characterization ,antioxidant and anti-inflammatory activity ,immunomodulation ,molecular docking - Abstract
Циљ ове докторске дисертације био је одређивање хемијског састава различитих екстраката маховине Hypnum cupressiforme Hedw. и испивање њиховог имуномодулаторног потенцијала применом (1) in vitro и (2) in silico истраживања. Екстракти маховине H. cupressiforme садрже различите групе фенолних једињења. Најприсутнија фенолна киселина у екстрактима била је p-хидроксибензоева киселина, а кемпферол најприсутнији флавоноид. Екстракти су показали значајан антиоксидативни, антидијабетични и антинеуродегенеративни потенцијал, а поред цитокомпатибилности, показали су и значајан антитуморски, антинеуроинфламаторни и неуропротективни потенцијал. Антитуморска активност је показана према MDA-MB-231 ћелијама хуманог аденокарцинома дојке, где су екстракти смањили метаболичку активност и повећали продукцију реактивних врста кисеоника (РВК) и азот оксида (NO) од стране ових ћелија. Третман екстрактима маховине липополисахаридом (ЛПС) активираних BV2 ћелија довео је до значајног смањења продукције NO, РВК и проинфламаторних цитокина, што указује на њихов антинеуроинфламаторни потенцијал. Екстракти су значајно смањили неуроцитотоксични потенцијал солубилних медијатора ослобађених од стране ЛПС-ом активираних ћелија микроглије према SH-SY5Y неуронима, што је значајно за њихову неуропротективну активност. Молекулским докингом показано је да најјачи афинитет везивања према ацетилхолинестерази показује ериодиктиол, према тирозинази гљиве кверцетин-3-О-рутинозид, а према тирозинази човека кофеинска киселина. Сумирано, испитивани екстракти маховине H. cupressiforme садрже разноврсна биолошки активна једињења која показују значајне активности, те постоји основ за њихову употребу као потенцијалне помоћне терапије у терапији болести повезаних са оксидативним стресом и инфламацијом. The aim of this doctoral dissertation was to determine the chemical composition of different extracts of the moss Hypnum cupressiforme Hedw. and to test their immunomodulatory potential using (1) in vitro and (2) in silico studies. Extracts of moss H. cupressiforme contain different groups of phenolic compounds. The most abundant phenolic acid in the extracts was p-hydroxybenzoic acid, while kaempferol was the most abundant flavonoid. The extracts exhibited significant antioxidant, antidiabetic and antineurodegenerative potential, and together with biocompatibility, they showed significant antitumor, antineuroinflammatory and neuroprotective potential. Antitumor activity was demonstrated against MDA-MB-231 human breast adenocarcinoma cells, where extracts reduced metabolic activity and increased the production of reactive oxygen species (ROS) and nitric oxide (NO) by these cells. Treatment of lipopolysaccharide (LPS)-activated BV2 mouse microglia cells with moss extracts has led to a decrease in the production of NO, ROS, and pro- inflammatory cytokines, indicating their antineuroinflammatory potential. The extracts reduced the neurocytotoxic potential of soluble mediators released by LPS-activated microglia cells towards SH-SY5Y neurons, thus exhibiting neuroprotective activity. Мolecular docking showed that eriodictyol has the strongest binding affinity to acetylcholinesterase, quercetin-3-O- rutinoside to mushroom tyrosinase, and caffeic acid has the highest affinity to human tyrosinase. In summary, investigated extracts of moss H. cupressiforme contain various biologically active compounds that show significant activities, and there is a basis for their use as a potential adjuvant therapy in the treatment of diseases associated with oxidative stress and inflammation.
- Published
- 2023
40. Молекуларни механизми антитуморске активности новосинтетисаних 3-супституисаних-5-изопропил-5-фенилхидантоина
- Author
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Obradović, Ana, Božić, Biljana, Ognjanović, Branka, Matić, Miloš, Božić, Bojan Đ., and Marinković, Emilija
- Abstract
Колоректални тумор је један од три најчешћа типа тумора у западној хемисфери и представља водећи узрок смрти изазван тумором у целини. До 20% пацијената има метастатску дисеминацију, најчешће у јетри. Операција би могла бити ефикасан третман само за одабране пацијенте, док су зрачење и помоћна хемотерапија и даље доминантна препоручена терапија за пацијенте са колоректалним тумором који имају метастазе на лимфним чворовима. Тумор дојке је најчешћи тип тумора и други водећи узрок смрти повезаних са тумором код жена широм света, што резултира са више од пола милиона смрти сваке године. Упркос широкој употреби мултимодалних хемотерапија, ниво смртности остаје висок, што наглашава потребу за новим терапијским приступима са већом ефикасношћу против малигних ћелија и напредном селективношћу према здравим ткивима. Хидантоин (имидазолидин-2,4-дион) и његови бројни деривати су једињења која се користе за клиничко лечење напада, епилепсије и срчане аритмије. Различита биолошка и фармаколошка својства, деривата хидантоина омогућила су им додатну примену као антимикробна, фунгицидна и хербицидна средства, такође испољавајући значајна противупална, хиполипидемична, антихипертензивна и антитуморска дејства. Нове физиолошке улоге хидантоина и његових деривата описане су у бројним истраживањима и данас су предмет многих студија. Хидантоин и његови новосинтетисани деривати су у фокусу нових студија због бројних биолошких активности и новонасталих корисних ефеката у различитим патолошким стањима, укључујући тумор. Циљ ове студије био је проценити могуће антитуморске механизме низа синтетисаних деривата 3-(4-супституисаних бензил)-5-изопропил-5-фенилхидантоина на различитим аспектима ћелијске физиологије код ћелијских линија тумора дебелог црева, HCT-116 и тумора дојке, MDA-MB-231. Ћелије су третиране растућим концентрацијама деривата хидантоина (0,01 μМ до 100 μМ) током 24, 48 и 72 сата, након чега је извршена процена степена пролиферације, присуства апоптозе, анализа ћелијског циклуса, активности каспаза, оксидативног/анти-оксидативног статуса, производње нитрита и способности миграције/потенцијал инвазије, утврђен је и профил експресије гена за iNOS, COX-2 и MMP-9. Добијени резултати показују значајан антитуморски потенцијал испитиваних деривата, посебно 3-бензил-5-изопропил-5-фенилхидантоина и 3-(4-хлоробензил)-5-изопропил-5-фенилхидантоина, што указује на могућност њихове потенцијалне употребе за развоју ефикаснијих хемотерапијских агенаса. Апоптоза игра кључну улогу у развоју организма, хомеостази ткива, имунском одговору, као и у етиологији бројних болести, укључујући туморе. Туморске ћелије избегавају апоптозу, прекомерно се размножавају и опстају у хипоксичним условима, стекавши отпорност на терапијска средства. Међу разним механизмима који доприносе избегавању апоптозе у ћелијама тумора појављују се њихове специфичне метаболичке адаптације и сигнализација као пресудни фактори. Ћелијски метаболити и разни сигнални молекули могу да регулишу активацију про- и анти-апоптотских протеина, укључујући каспазе, породицу протеаза специфичних за аспарагинску киселину, које су главни ефектори апоптозе... Colorectal cancer is one of the three most common cancer types in the Western Hemisphere and represents a leading cause of death induced by cancer overall. Up to 20% of patients experience metastatic dissemination, most commonly to the liver. The surgery could be effective treatment only for selected patients, while the radiation and adjuvant chemotherapy remain the dominant recommended therapies for colorectal cancer patients with lymph node metastases. Breast cancer is the most common cancer type and the second leading cause of cancer-related deaths in women across the world resulting in more than half a million deaths each year. Despite the extensive use of multimodal chemotherapies, the level of mortality remains high, emphasizing the need for novel therapeutic approaches with higher efficiency against malignant cells and advanced selectivity towards healthy tissues. Hydantoin (imidazolidine-2,4-dione) and its numerous derivatives are compounds widely used for clinical treatment of seizures, epilepsy, and cardiac arrhythmias. Possessing various biological and pharmacological properties, hydantoin derivatives gained additional applications as anti-microbial, fungicidal, and herbicidal agents, also expressing significant anti-inflammatory, hypolipidemic, antihypertensive, and antitumor activities. Novel physiological roles of hydantoin and its derivatives emerged in numerous studies are yet to be fully understood. Hydantoin and its newly synthesized derivatives have recently become a focus of interest due to their numerous biological activities and newly emerging beneficial effects in different pathological conditions, including cancer. The aim of this study was to evaluate the possible antitumor mechanisms of series of newly synthesized 3-(4-substituted benzyl)-5-isopropyl-5-phenylhydantoin derivatives on different aspects of cell physiology of human colon cancer cell line, HCT-116 and human breast cancer cell line MDA-MB-231. The increasing concentrations of derivatives (0.01 μM up to 100 μM) were applied to cells during 24 h, 48 h, and 72 h after which the evaluation of proliferation, apoptosis, cell cycle oxidative/anti-oxidative status, nitrite production, and migration/invasion potential, iNOS, COX-2 and MMP-9 expression profile of treated cells were performed. The obtained results show significant anti-tumor potential of tested derivatives, especially 3-benzyl-5-isopropyl-5-phenylhydantoin and 3-(4-chlorobenzyl)-5-isopropyl-5-phenylhydantoin, suggesting their potential usage in the development of more effective chemotherapies. Apoptosis plays a crucial role in development of organism, tissue homeostasis, immune response, and in etiology of numerous diseases, including tumors. Tumor cells evade apoptosis, excessively proliferate and survive under hypoxic conditions, acquiring the resistance to therapeutic agents. Among various mechanisms that contribute to the evasion of apoptosis in tumor cells their specific metabolic adaptations and signaling are emerging as the crucial factors. Cellular metabolites and various signal molecules can regulate the activation of pro- and anti-apoptotic proteins including caspases, a family of aspartic acid-specific proteases, which are the major effectors of apoptosis. Caspases are normally synthesized as inactive precursors but become activated at the onset of apoptosis by different activation signals. Apoptosis-inducing agents are expected to be effective antitumor drugs, since apoptosis is a protective mechanism against tumor development that acts to remove genetically damaged cells from the epithelium before they undergo clonal expansion. The production of reactive oxygen species (ROS) is a physiological process inherent to all aerobic organisms due to mitochondrial respiratory chain activity...
- Published
- 2020
41. Eksperimentalna i kvantno-hemijska proučavanja hinolonskih azo boja i njihovih prekursora
- Author
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Arsovski, Violeta M., Mijin, Dušan, Ušćumlić, Gordana S., Vitnik, Željko J., Petrović, Slobodan D., and Božić, Bojan Đ.
- Subjects
Hinoloni ,Malonamide ,Substituent effect ,Quantum-chemical calculations ,Solvatochromism ,Malonamidi ,Azo dyes ,Azo boje ,Uticaj supstituenata ,Quinolones ,Solvatohromizam ,Kvantno-hemijski proračun - Abstract
Predmet istraživanja ove doktorske disertacije bila je eksperimentalna i teorijska analiza strukture hinolonskih azo boja i njihovih prekursora. U okviru disertacije, izvršena je sinteza azo boja kod kojih je ulogu kuplujuće komponente imao 4-hidroksi- -2-hinolon, dok je diazo komponenta bila odgovarajući p-supstituisan anilin. Najpre je izvršena sinteza serije N,N’-bisarilmalonamida (prekursora hinolona) čija je detaljna analiza (eksperimentalna i teorijska) dala odgovore u vezi sa geometrijom i reaktivnošću ispitivanih prekursora. Proučavan je uticaj supstituenata fenilnog jezgra, na azo-hidrazon tautomeriju u rastvorima (kod azo boja), kao i na geometriju i reaktivnost prekursora (kod N,N’-bisarilmalonamida). Takođe, proučavan je uticaj i rastvarača na formiranje intra- i intermolekulske vodonične veze kod N,N’-bisarilmalonamida. Izvršena je analiza uticaja rastvarača na apsorpcione spektre ispitivanih jedinjenja primenom linearne korelacije energije solvatacije (LSER) uz korišćenje Kamlet-Taftove (Kamlet-Taft) i Katalanove (Catalán) jednačine. Urađena je i optimizacija geometrije ispitivanih jedinjenja i proučeno je prenošenje elektronskih efekata primenom kvantno-hemijskih proračuna (DFT). Sva jedinjenja sintetisana su prema originalnim ili modifikovanim metodama iz literature. Jedinjenja su okarakterisana temperaturama topljenja, UV-Vis, FT-IR, 1H i 13C NMR spektrima i elementarnom analizom. Na osnovu spektralnih podataka utvrđena je struktura tautomernih oblika boja. UV-Vis apsorpcioni maksimumi određeni su u različitim rastvaračima (spektroskopske čistoće). Uticaj supstituenata na prenošenje elektronskih efekata kod N,N’-bisarilmalonamida ispitan je primenom jednoparametarske i dvoparametarske Hametove (Hammett) jednačine, kao i primenom Svain-Luptonove (Swain-Lupton) jednačine. Rezultati dobijeni UV-spektroskopskim merenjima (kod N,N'-bisarilmalonamida) pokazuju, da na položaj UV-apsorpcionih frekvencija mnogo više utiče prisutni supstituent na fenilnom prstenu, nego svojstva rastvarača. Kamlet-Taft analiza je pokazala da solvatohromizam nastaje najvećim delom zbog dipolarnosti/polarizabilnosti rastvarača. Rezultati dobijeni Hametovom jednačinom ukazuju na postojanje proširene delokalizacije. Kvantno mehanički poračuni ukazuju da u zavisnosti od okolnog medijuma molekuli N,N'-bisarilmalonamida mogu imati različitu geometriju. Rezultati dobijeni FT-IR i UV-Vis analizom hinolonskih boja pokazuju postojanje tautomerije kao i dominantnost hidrazo-keto oblika u odnosu na druge. Uticaj supstituenata na fenilnom jezgru na UV-Vis apsorpcione spektre takođe je veći nego uticaj rastvarača. NBO analize daju jasnu sliku o intramolekulskom prenosu naelektrisanja kod ispitivanih jedinjenja u zavisnosti od prisutnih supstituenata... Subject of this doctoral dissertation is the experimental and theoretical analysis of quinolone azo dyes and their precursors structure. Within the theses, the synthesis of azo dyes in which the role of the coupling components had the 4-hydroxy-2-quinolone while the diazo component was the corresponding p-substituted aniline, was carried out. First the synthesis of a series of N,N'-bisarylmalonamides (precursor) was performed. In-depth analysis (experimental and theoretical) of the prepared amides afforded the answers regarding the geometry and the reactivity of the tested precursors. The impact of the nature of the substituents on the phenyl nucleus, on the azo-hydrazone tautomerism in solution (with azo dyes), as well as the geometry and the reactivity of the precursor (N,N'-bisarilmalonamida) was studied. Also, the influence of solvents on the azo-hydrazone tautomerism of azo dyes as well as the solvent effect on the formation of intra- and intermolecular hydrogen bonds in N,N'-bisarylmalonamides was investigated. The analysis was performed using linear correlation free energy of solvation (LSER) using Kamlet-Taft and Catalan equations. Has been done the optimization of the tested compounds and examined the transmission of electronic effects of the application of quantum-chemical calculations (DFT). All compounds were synthesized according to the original or modified methods from the literature. The compounds were characterized by melting point, UV-Vis, FT-IR, 1H and 13C NMR spectra and elemental analysis. Determination of UV-Vis absorption maximum in a variety of solvents (spectroscopic grade) was carried out using a UV-Vis spectrophotometer. The effect of substituents on the transmission of electronic effects in N,N’-bisarylmalonamides was tested using simple and extended Hammett equations, as well as by Swain-Lupton equation. The results obtained by UV spectroscopic measurements (the N,N'-bisarilmalonamida) shows that the position of a UV absorption frequency much more affects the nature of substituents present on the phenyl ring than the properties of the solvent. Kamlet-Taft analysis showed that solvatochromism occurs mainly due dipolarity/polarizability solvent. Results obtained using the Hammett equation, indicate the existence of extended delocalization. The quantum mechanical calculations indicate that depending on the surrounding medium molecule N,N'-bisarilmalonamida can have various geometry. The results obtained by FT-IR and UV-Vis analysis of quinolone azo dyes indicate the existence of tautomerism and dominance of hydrazo-keto form. The influence of nature of the substituents on the phenyl nucleus in UV-Vis absorption spectra is also higher than the effect of the solvent. NBO analysis results give a clear picture of intramolecular charge transfer of the tested compounds according to the substituents present compounds...
- Published
- 2017
Catalog
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