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Öğe Conventional and microwave prompted synthesis of aryl(alkyl)azole oximes, 1H-NMR spectroscopic determination of E/Z isomer ratio and HOMO-LUMO analysis(Elsevier, 2022) Bozbey, Irem; Uslu, Harun; Turkmenoglu, Burcin; Ozdemir, Zeynep; Karakurt, Arzu; Levent, SerkanIn this study, 12 oxime derivatives were synthesized by using with conventional method and microwave irradiation method. It was aimed to compare the effectiveness of the conventional method and microwave method. Their yields were determined for both methods, and the yields increased when the microwave method was used. The compounds which have oxime show geometric isomerism because they have carbon-nitrogen double bonds. Therefore, we have also aimed to evaluate their E/Z isomer ratios in this study. While the synthesized pyrazole derivative compounds were mostly obtained in Z isomer in both synthesis methods, it was observed that some of the title compounds were almost completely obtained as E isomers when the conventional synthesis method was used in the synthesized imidazole derivative compounds. The structures of synthesized compounds were confirmed by IR, H-1-NMR, C-13-NMR and HRMS spectra. Additionally, in this study, the HOMO-LUMO energies and thermodynamic properties of the E/Z isomers of 12 oxime derivatives were performed using the 6-31 * G basis set and the Density Functional Theory (DFT) calculation using the B3LYP method three different environments (water, ethanol, vacuum). In addition, geometric parameters such as chemical hardness (eta), chemical potential (mu), electrophilicity index (omega), chemical softness (sigma) were calculated depending on the calculated HOMO-LUMO energies. (C) 2021 Elsevier B.V. All rights reserved.Öğe Conventional and microwave prompted synthesis, antioxidant, anticholinesterase activity screening and molecular docking studies of new quinolone-triazole hybrids(Academic Press Inc Elsevier Science, 2018) Mermer, Arif; Demirbas, Neslihan; Sirin, Yakup; Uslu, Harun; Ozdemir, Zeynep; Demirbas, AhmetThe synthesis of ethyl 4-oxo-1,4-dihydroquinoline-3-carboxylates (4, 5) was performed via the reaction of corresponding anilines with diethyl ethoxymethylenemalonate under conventional and also microwave promoted conditions. The treatment of 4 and 5 afforded the corresponding hydrazides (6 and 7). These hydrazides were converted to the corresponding carbo(thio) amides (9a-f and 10a-e) which were then subjected to an intramolecular cyclisation leading to the formation of quinolone-triazole hybrids (11a-f and 12a-e). The newly synthesized compounds were screened for their biological activities such as antioxidant capacity (AC) and acetylcholinesterase Activity. Inhibition of cholinesterases is an effective method to curb Alzheimer's disease, a progressive and fatal neurological disorder. A series of some novel quinolone derivatives were designed, synthesized, and their inhibitory effects on AChE were evaluated. We obtained our compounds and determined their anticholinesterase activities according to the Ellman's method. 9b and 10c showed the best AChE inhibition with 0.48 +/- 0.02 and 0.52 +/- 0.07, respectively. Docking studies were performed for the most active compounds (9b, 10c) and interaction modes with enzyme active sites were determined. As a result of these studies, a strong interaction between these compounds and the active sites of AChE enzyme was revealed. (C) 2018 Elsevier Inc. All rights reserved.Öğe Coumarin or benzoxazinone based novel carbonic anhydrase inhibitors synthesis molecular docking and anticonvulsant studies(Journal of Enzyme Inhibition and Medicinal Chemistry, 2016) Karataş, Mert Olgun; Uslu, Harun; Sarı, Suat; Alagöz, Mehmet Abdullah; Karakurt, Arzu; Alıcı, Bülent; Bilen, Çiğdem; Yavuz, Emre; Gençer, Nahit; Arslan, OktayAmong many others, coumarin derivatives are known to show human carbonic anhydrase (hCA) inhibitory activity. Since hCA inhibition is one of the underlying mechanisms that account for the activities of some antiepileptic drugs (AEDs), hCA inhibitors are expected to have antiseizure properties. There are also several studies reporting compounds with an imidazole and/or benzimidazole moiety which exert these pharmacological properties. In this study, we prepared fifteen novel coumarin-bearing imidazolium and benzimidazolium chloride, nine novel benzoxazinone-bearing imidazolium and benzimidazolium chloride derivatives and evaluated their hCA inhibitory activities and along with fourteen previously synthesized derivatives we scanned their anticonvulsant effects. As all compounds inhibited purified hCA isoforms I and II, some of them also proved protective against Maximal electroshock seizure (MES) and ScMet induced seizures in mice. Molecular docking studies with selected coumarin derivatives have revealed that these compounds bind to the active pocket of the enzyme in a similar fashion to that previously described for coumarin derivatives.Öğe Coumarin or benzoxazinone based novel carbonic anhydrase inhibitors: synthesis, molecular docking and anticonvulsant studies(Taylor & Francis Ltd, 2016) Karatas, Mert Olgun; Uslu, Harun; Sari, Suat; Alagoz, Mehmet Abdullah; Karakurt, Arzu; Alici, Bulent; Bilen, CigdemAmong many others, coumarin derivatives are known to show human carbonic anhydrase (hCA) inhibitory activity. Since hCA inhibition is one of the underlying mechanisms that account for the activities of some antiepileptic drugs (AEDs), hCA inhibitors are expected to have anti-seizure properties. There are also several studies reporting compounds with an imidazole and/or benzimidazole moiety which exert these pharmacological properties. In this study, we prepared fifteen novel coumarin-bearing imidazolium and benzimidazolium chloride, nine novel benzoxazinone-bearing imidazolium and benzimidazolium chloride derivatives and evaluated their hCA inhibitory activities and along with fourteen previously synthesized derivatives we scanned their anticonvulsant effects. As all compounds inhibited purified hCA isoforms I and II, some of them also proved protective against Maximal electroshock seizure (MES) and ScMet induced seizures in mice. Molecular docking studies with selected coumarin derivatives have revealed that these compounds bind to the active pocket of the enzyme in a similar fashion to that previously described for coumarin derivatives.Öğe Development of Some Antiplatelet Salts as Drug Active Ingredients and Investigation Biological Activities(Springer, 2023) Uslu, Harun; Satilmis, Basri; Uyumlu, Ayse Burcin; Saglik, Begum Nurpelin; Levent, Serkan; Ozkay, Yusuf; Genc, Metin FikretIn this study, prasugrel and prasugrel salts: prasugrel + trans-1,2-cyclohexanedicarboxylic acid (1a), prasugrel + maleic acid (2a), prasugrel + citric acid (3a), prasugrel + oxalic acid (4a), and prasugrel + trometamol (5a) were synthesized and investigated for their biological activities.Ex vivo antiplatelet and in vitro cytotoxic activities were experimentally researched. Antiproliferative activity was not observed for prasugrel and prasugrel salts, and it was also determined that there was no cytotoxic effect. Ex vivo experiments were carried out on diabetic and nondiabetic rats. When the study results were examined, 2a and 3a were seen to be effective prasugrel salts for antiplatelet activity.Öğe (E)-1-(4-Hydroxyphenyl)-3-(substituted-phenyl) prop-2-en-1-ones: Synthesis, In Vitro Cytotoxic Activity and Molecular Docking Studies(Slovensko Kemijsko Drustvo, 2022) Sirka, Lutfiye; Dogan, Hacer; Bahar, Mehmet Refik; Caliskan, Eray; Tekin, Suat; Uslu, Harun; Koran, KenanA series of chalcone compounds (2-11) were designed and synthesized to determine their cytotoxic effects. The structures of 2-11 were fully characterized by their physical and spectral data. The in vitro cytotoxic effects of 2-11 were evaluated against human ovarian cancer (A2780), breast cancer (MCF-7) and prostate cancer (PC-3 and LNCaP) cell lines. The activity potentials of compounds were further evaluated through molecular docking studies with AutoDock4 and Vina softwares. All the compounds (except compound 5) showed significant cytotoxic effects at high doses in all cancer cell lines. Among all the compounds studied, one compound i.e. compound 2 demonstrated dose-dependent activity, particularly against A2780/LNCaP cancer cell lines. The most effective compounds 8, 9, 10 and 11 reduced the cell viability of A2780, MCF-7, PC-3 and LNCaP cells by 50-98%, while other compounds 2, 4 and 7 reduced the cell viability of A2780 cells by 70-90% at concentrations of 50 and 100 mu M.Öğe Functionalized imidazolium and benzimidazolium salts as paraoxonase 1 inhibitors synthesis characterization and molecular docking studies(Bioorganic & Medicinal Chemistry, 2016) Karataş, Mert Olgun; Uslu, Harun; Alıcı, Bülent; Gökçe, Başak; Gençer, Nahit; Arslan, Oktay; Arslan, Nahide Burcu; Özdemir, NamıkParaoxonase (PON) is a key enzyme in metabolism of living organisms and decreased activity of PON1 was acknowledged as a risk for atherosclerosis and organophosphate toxicity. The present study describes the synthesis, characterization, PON1 inhibitory properties and molecular docking studies of functionalized imidazolium and benzimidazolium salts (1a–5g). The structures of all compounds were elucidated by IR, NMR, elemental analysis and structures of compounds 2b and 2c were characterized by single-crystal X-ray diffraction. Compound 1c, a coumarin substituted imidazolium salt showed the best inhibitory effect on the activity of PON1 with good IC50 value (6.37 lM). Kinetic investigation was evaluated for this compound and results showed that this compound is competitive inhibitor of PON1 with Ki value of 2.39 lM. Molecular docking studies were also performed for most active compound 1c and one of least active compound 2c in order to determine the probable binding model into active site of PON1 and validation of the experimental results.Öğe Functionalized imidazolium and benzimidazolium salts as paraoxonase 1 inhibitors: Synthesis, characterization and molecular docking studies(Pergamon-Elsevier Science Ltd, 2016) Karatas, Mert Olgun; Uslu, Harun; Alici, Bulent; Gokce, Basak; Gencer, Nahit; Arslan, Oktay; Arslan, N. BurcuParaoxonase (PON) is a key enzyme in metabolism of living organisms and decreased activity of PON1 was acknowledged as a risk for atherosclerosis and organophosphate toxicity. The present study describes the synthesis, characterization, PON1 inhibitory properties and molecular docking studies of functionalized imidazolium and benzimidazolium salts (1a-5g). The structures of all compounds were elucidated by IR, NMR, elemental analysis and structures of compounds 2b and 2c were characterized by single-crystal X-ray diffraction. Compound 1c, a coumarin substituted imidazolium salt showed the best inhibitory effect on the activity of PON1 with good IC50 value (6.37 mu M). Kinetic investigation was evaluated for this compound and results showed that this compound is competitive inhibitor of PON1 with K-1, value of 2.39 mu M. Molecular docking studies were also performed for most active compound 1c and one of least active compound 2c in order to determine the probable binding model into active site of PON1 and validation of the experimental results. (C) 2016 Elsevier Ltd. All rights reserved.Öğe Histological assessment of liver and stomach damage caused by pyridazinone derivative antidepressant agents(Taylor & Francis Ltd, 2022) Ozdemir, Zeynep; Karakurt, Arzu; Taslidere, Elif; Vardi, Nigar; Alagoz, Mehmet Abdullah; Parlakpinar, Hakan; Uslu, HarunDepression is a serious psychological disorder that affects a significant population. We investigated the antidepressant activities of four pyridazinone derivatives that contain the hydrazide moiety using the forced swimming test (FST). The compounds tested exhibited good antidepressant activity compared to duloxetine. The most promising compound was compound 2, which reduced the duration of immobility during FST. The toxic effects of the four compounds on the histomorphology of the liver and stomach tissue also was evaluated.Öğe New (arylalkyl)azole derivatives showing anticonvulsant effects could have VGSC and/or GABAAR affinity according to molecular modeling studies(Elsevier France-Editions Scientifiques Medicales Elsevier, 2016) Sari, Suat; Karakurt, Arzu; Uslu, Harun; Kaynak, F. Betul; Calis, Unsal; Dalkara, Sevim(Arylalkyl)azoles (AAAs) emerged as a novel class of antiepileptic agents with the invention of nafimidone and denzimol. Several AAA derivatives with potent anticonvulsant activities have been reported so far, however neurotoxicity was usually an issue. We prepared a set of ester derivatives of 1-(2-naphthyl)2-(1H-1,2,4-triazol-1-yeethanone oxime and evaluated their anticonvulsant and neurotoxic effects in mice. Most of our compounds were protective against maximal electroshock (MES)- and/or subcutaneous metrazol (s.c. MET)-induced seizures whereas none of them showed neurotoxicity. Nafimidone and denzimol have an activity profile similar to that of phenytoin or carbamazepine, both of which are known to inhibit voltage-gated sodium channels (VGSCs) as well as to enhance gamma-aminobutiric acid (GABA)-mediated response. In order to get insights into the effects of our compounds on VGSCs and A type GABA receptors (GABA(A)Rs) we performed docking studies using homology model of Na+ channel inner pore and GABA(A)R as docking scaffolds. We found that our compounds bind VGSCs in similar ways as phenytoin, carbamazepine, and lamotrigine. They showed strong affinity to benzodiazepine (BZD) binding site and their binding interactions were mainly complied with the experimental data and the reported BZD binding model. (C) 2016 Elsevier Masson SAS. All rights reserved.Öğe New arylalkyl azole derivatives showing anticonvulsant effects could have VGSC and or GABAAR affinity according to molecular modeling studies(European Journal of Medicinal Chemistry, 2016) Sarı, Suat; Karakurt, Arzu; Uslu, Harun; Kaynak, Filiz Betül; Çalış, Ünsal; Dalkara, Sevim(Arylalkyl)azoles (AAAs) emerged as a novel class of antiepileptic agents with the invention of nafimidone and denzimol. Several AAA derivatives with potent anticonvulsant activities have been reported so far, however neurotoxicity was usually an issue. We prepared a set of ester derivatives of 1-(2-naphthyl)- 2-(1H-1,2,4-triazol-1-yl)ethanone oxime and evaluated their anticonvulsant and neurotoxic effects in mice. Most of our compounds were protective against maximal electroshock (MES)- and/or subcutaneous metrazol (s.c. MET)-induced seizures whereas none of them showed neurotoxicity. Nafimidone and denzimol have an activity profile similar to that of phenytoin or carbamazepine, both of which are known to inhibit voltage-gated sodium channels (VGSCs) as well as to enhance g-aminobutiric acid (GABA)-mediated response. In order to get insights into the effects of our compounds on VGSCs and Atype GABA receptors (GABAARs) we performed docking studies using homology model of Naþ channel inner pore and GABAAR as docking scaffolds. We found that our compounds bind VGSCs in similar ways as phenytoin, carbamazepine, and lamotrigine. They showed strong affinity to benzodiazepine (BZD) binding site and their binding interactions were mainly complied with the experimental data and the reported BZD binding model.Öğe Screening of phenolic components and antimicrobial properties of Iris persica L. subsp. persica extracts by in vitro and in silico methods(Wiley, 2024) Unver, Tuba; Uslu, Harun; Gurhan, Ismet; Goktas, BunyaminThe tendency toward natural herbal products has increased due to the antibiotic resistance developed by microorganisms and the severe side effects of antibiotics commonly used in infectious diseases worldwide. Although antimicrobial studies have been conducted with several species of the Iris genus, this study is the first in the literature to be performed with Iris persica L. subsp. persica aqueous and methanol extracts. In this study, the phenolic content of I. persica was determined by LC-MS/MS analysis, the in vitro antimicrobial activity of I. persica aqueous and methanol extracts was examined, and this study was supported by in silico analysis. Consequently, methanol and aqueous extracts were observed to have inhibitory effects against all tested microorganisms except Candida krusei. Although the MIC values of aqueous extract and methanol extract against Staphylococcus aureus and Klebsiella pneumoniae are the same (22.5 and 11.25 mg/mL, respectively), the inhibitory effect of aqueous extract is generally more potent (MIC value is 11.25 mg/mL for Candida parapsilosis and other bacterial species, and 90 mg/mL for Candida albicans and Candida tropicalis) than that of methanol extract. In silico results showed that hydroxybenzaldeyde, vanillin, resveratrol, isoquercitrin, kaempferol-3-glucoside, fisetin, and luteolin were more prone to antifungal activity. Hence, shikimic, gallic, protocatechuic, vanillic, caffeic, o-coumaric, trans-ferulic, sinapic acids, and hesperidin were more prone to antibacterial activity. In vitro and in silico results show that the antibacterial activity of our extracts may be higher than the antifungal activity. This preliminary study indicates the anti-infective potential of I. persica extracts and their usability in medicine and pharmacology.Öğe A Series of New Hydrazone Derivatives: Synthesis, Molecular Docking and Anticholinesterase Activity Studies(Bentham Science Publ Ltd, 2020) Bozbey, Irem; Ozdemir, Zeynep; Uslu, Harun; Ozcelik, Azime Berna; Senol, Fatma Sezer; Orhan, Ilkay Erdogan; Uysal, MchtapBackground: Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) are known to be serine hydrolase enzymes responsible for the hydrolysis of acetylcholine (ACh), which is a significant neurotransmitter for regulation of cognition in animals. Inhibition of cholinesterases is an effective method to curb Alzheimer's disease, a progressive and fatal neurological disorder. Objective: In this study, 30 new hydrazone derivatives were synthesized. Then we evaluated their anticholinesterase activity of compounds. We also tried to get insights into binding interactions of the synthesized compounds in the active site of both enzymes by using molecular docking approach. Methods: The compounds were synthesized by the reaction of various substituted/nonsubstituted benzaldehydes with 6-(substitute/nonsubstituephenyl)-3(2H)-pyridazinone-2-yl propiyohydrazide. Anticholinesterase activity of the compounds was determined using Ellman's method. Molecular docking studies were done by using the ADT package version 1.5.6rc3 and showed by Maestro. RMSD values were obtained using Lamarckian Genetic Algorithm and scoring function of AutoDock 4.2 release 4.2.5.1 software. Results: The activities of the compounds were compared with galantamine as cholinesterase enzyme inhibitor, where some of the compounds showed higher BChE inhibitory activity than galantamine. Compound F1(11) was shown to be the best BChE inhibitor effective in 50 mu M dose, providing 89.43% inhibition of BChE (IC50=4.27 +/- 0.36 mu M). Conclusion: This study supports that novel hydrazone derivates may be used for the development of new BChE inhibitory agents.Öğe Some coumarins and benzoxazinones as potent paraoxonase 1 inhibitors(Taylor & Francis Ltd, 2016) Karatas, Mert Olgun; Uslu, Harun; Alici, Bulent; Gokce, Basak; Gencer, Nahit; Arslan, OktayIn this study, we aimed to investigate the effect of some coumarin and benzoxazinone derivatives on the activity of human PON1. Human serum paraoxonase 1 was purified from fresh human serum blood by two-step procedures that are ammonium sulfate precipitation (60-80%) and then hydrophobic interaction chromatography (Sepharose 4B, L-tyrosine and 1-napthylamine). The enzyme was purified 232-fold with a final specific activity of 27.1 U/mg. In vitro effects of some previously synthesized ionic coumarin or benzoxazinone derivatives (1-21) on purified PON1 activity were investigated. Compound 14 (1-(2,3,4,5,6)-pentamethyl-benzyl-3-(6,8-dimethyl-2H-chromen-2-one-4-yl)) benzimidazolium chloride was found out as the strongest inhibitor (IC50 = 7.84 mu M) for PON1 among the compounds. Kinetic investigation and molecular docking study were evaluated for one of the most active compounds (compound 12) and obtained data showed that this compound is competitive inhibitor of PON1 and interact with Leu262 and Ser263 in the active site of PON1. Moreover, coumarin derivatives were found out as the more potent inhibitors for PON1 than benzoxazinone derivatives.Öğe Some coumarins and benzoxazinones as potent paraoxonase 1 inhibitors(Journal of Enzyme Inhibition and Medicinal Chemistry, 2016) Karataş, Mert Olgun; Alıcı, Bülent; Gökçe, Başak; Gencer, Nahit; Arslan, Oktay; Uslu, HarunIn this study, we aimed to investigate the effect of some coumarin and benzoxazinone derivatives on the activity of human PON1. Human serum paraoxonase 1 was purified from fresh human serum blood by two-step procedures that are ammonium sulfate precipitation (60–80%) and then hydrophobic interaction chromatography (Sepharose 4B, L-tyrosine and 1-napthylamine). The enzyme was purified 232-fold with a final specific activity of 27.1 U/mg. In vitro effects of some previously synthesized ionic coumarin or benzoxazinone derivatives (1–21) on purified PON1 activity were investigated. Compound 14 (1-(2,3,4,5,6)-pentamethylbenzyl-3-(6,8-dimethyl-2H-chromen-2-one-4-yl))benzimidazolium chloride was found out as the strongest inhibitor (IC50 ¼ 7.84 mM) for PON1 among the compounds. Kinetic investigation and molecular docking study were evaluated for one of the most active compounds (compound 12) and obtained data showed that this compound is competitive inhibitor of PON1 and interact with Leu262 and Ser263 in the active site of PON1. Moreover, coumarin derivatives were found out as the more potent inhibitors for PON1 than benzoxazinone derivativesÖğe Synthesis and cytotoxicity studies on new pyrazole-containing oxime ester derivatives(Pharmacotherapy Group, 2019) Karakurt, Arzu; Bozbey, Irem; Uslu, Harun; Sari, Suat; Ozdemir, Zeynep; Salva, EminePurpose: To synthesize a series of new 1-(2-naphthyl)-2-(1H-pyrazol-1-yl)ethanone oxime ester derivatives (5-12) with potential anticancer properties, and to determine their cytotoxic effects in mouse fibroblast and human neuroblastoma cell lines. Methods: The title compounds were obtained through sodium salt reaction of 1-(naphthalene-2-yl)-2(1H-pyrazol-1-yl)etanone oxime (4) with various acyl chlorides. The cytotoxic effects were evaluated by MTS colorimetric assay, while physicochemical descriptors were calculated using QikProp software. Results: Most of the compounds showed approximately 50 - 60 % inhibition against SH-SY5Y neuroblastoma cells at 100 mu M. Of these, compound 7a was the most active combination with an IC50 value of 85.94 mu M. The toxic effect of the compounds on mouse fibroblast cell line was insignificant (p < 0.05) even when the dose was increased. The calculated physicochemical properties of the compounds were within drug-like chemical space. Conclusion: The synthesized oxime ester derivatives with pyrazole ring exhibit selective toxicity to neuroblastoma cells without affecting healthy mouse fibroblast cells. The compounds proved to be drug-like while their pharmacokinetic features were also encouraging, and were in line with in silico predictions.Öğe Synthesis and spectroscopic characterizations of hexakis[(1-(4 '-oxyphenyl)-3-(substituted-phenyl)prop-2-en-1-one)]cyclotriphosphazenes: their in vitro cytotoxic activity, theoretical analysis and molecular docking studies(Taylor & Francis Inc, 2022) Dogan, Hacer; Bahar, Mehmet Refik; Caliskan, Eray; Tekin, Suat; Uslu, Harun; Akman, Feride; Koran, KenanThe hexachlorocyclotriphosphaze compound (N3P3Cl6, HCCP) was reacted with excess (E)-(1-(4 '-oxyphenyl)-3-(substituted-phenyl)prop-2-en-1-ones (2-11) to produce hexakis[(1-(4-oxyphenyl)-3-(substituted-phenyl)prop-2-en-1-one)]cyclotriphosphazenes (CP 2-11). The structures of products (CP 2-11) were confirmed using elemental analysis, FT-IR, MS spectral analysis as well as P-31, H-1 and C-13-APT NMR techniques and their thermal properties determined by TGA and DSC techniques. The HOMO-LUMO energy gap and chemical reactivity identifiers were calculated and HOMO and LUMO images were viewed. According to the calculations, all the chemical potential values of CP 2-11 are negative and it shown that the molecules are stable. The in vitro cytotoxic of CP 2-11 investigated and their activity potentials were evaluated by molecular docking studies with Autodock Vina softwares. CP 2-11 compounds were found to demonstrate cytotoxic activity against human cancer cell lines (A2780, LNCaP and PC-3). The CP 2-11 compounds reduced the cell viability against all cancer cell lines in the range 36%-90% especially. The results showed that these compounds are powerful candidate molecules for pharmaceutical applications.Öğe Synthesis of novel Schiff bases using green chemistry techniques; antimicrobial, antioxidant, antiurease activity screening and molecular docking studies(Elsevier Science Bv, 2019) Mermer, Arif; Demirbas, Neslihan; Uslu, Harun; Demirbas, Ahmet; Ceylan, Sule; Sirin, YakupSchiff base derivatives were synthesized in this study via conventional, microwave irradiation and ultrasound sonication methods. Optimization conditions were examined for several parameter such as solvent, reaction time and yield. After determining the optimization conditions, the compounds were synthesized by using ultrasound sonication. The structures of the synthesized compounds were examined by spectral data, and the antiurease, antioxidant and antimicrobial activities of the Schiff bases derivatives were investigated due to the imine group (-C=N-) and promising results were obtained. The enzyme inhibitory potentials of these compounds were further validated through molecular docking studies. Also, In Silico ADME prediction studies were calculated for compounds. (C) 2019 Elsevier B.V. All rights reserved.Öğe Synthesis, molecular modelling and biological activity of some pyridazinone derivatives as selective human monoamine oxidase-B inhibitors(Springer Heidelberg, 2020) Ozdemir, Zeynep; Alagoz, Mehmet Abdullah; Uslu, Harun; Karakurt, Arzu; Erikci, Acelya; Ucar, Gulberk; Uysal, MehtapBackground Since brain neurotransmitter levels are associated with the pathology of various neurodegenerative diseases like Parkinson and Alzheimer, monoamineoxidase (MAO) plays a critical role in balancing these neurotransmitters in the brain. MAO isoforms appear as promising drug targets for the development of central nervous system agents. Pyridazinones have a broad array of biological activities. Here, six pyridazinone derivatives were synthesized and their human monoamine oxidase inhibitory activities were evaluated by molecular docking studies, in silico ADME prediction and in vitro biological screening tests. Methods The compounds were synthesized by the reaction of different piperazine derivatives with 3 (2H)-pyridazinone ring and MAO-inhibitory effects were investigated. Docking studies were conducted with Maestro11.8 software. Results Most of the synthesized compounds inhibited hMAO-B selectively except compound 4f. Compounds 4a-4e inhibited hMAO-B selectively and reversibly in a competitive mode. Compound 4b was found as the most potent (k(i)=0.0220.001 mu M) and selective (SI (Ki (hMAO-A/hMAO-B))=206.82) hMAO-B inhibitor in this series. The results of docking studies were found to be consistent with the results of the in vivo activity studies. Compounds 4a-4e were found to be non-toxic to HepG2 cells at 25 mu M concentration. In silico calculations of ADME properties indicated that the compounds have good pharmacokinetic profiles. Conclusion It was concluded that 4b is possibly recommended as a promising nominee for the design and development of new pyridazinones which can be used in the treatment of neurological diseases.Öğe Yeni platelet inhibitörü tuzların ilaç etkin maddesi olarak geliştirilmesi ve aktivitelerinin araştırılması(İnönü Üniversitesi, 2018) Uslu, HarunAmaç: Bu çalışmada ülkemizde üretimi olmayan aktif farmasötik bileşen geliştirilmesi, Üniversite-Sanayi işbirliğinde ilaç adayı olabilecek yeni bir molekülün ortak araştırmalar sonucu ortaya konulması istenmiştir. Bu tez kapsamında Prasugrel'in, çeşitli karşıt iyonlarla reaksiyonu sonucunda 2'si yeni 5 farklı Prasugrel tuzu elde edilmiş, yapıları ve saflıkları spektroskopik yöntemler ve eleman analizi verileriyle kanıtlanmıştır. Materyal ve Metot: Prasugrel tuzlarının in vitro antiplatelet ve antikanser aktiviteleri araştırılmış ve diyabette artan aterotromboz etkisini anlayabilmek için diyabetik ve nondiyabetik hayvanlarda in vivo-ex vivo antiplatelet aktiviteleri karşılaştırılmıştır. Ex vivo ölçümlerde Chrono-Log agregometre cihazı ile sitratlı tam kanda antiagregan aktivite belirlenmiştir. Trombosit aktivasyon yolağında yer alan bileşenlerin, serumdan ve tam kandan izole edilen trombositlerde ELISA tekniği ile ölçümü yapılmıştır. In vitro antiplatelet ve antikanser çalışmalarında ELISA kitleri kullanılmıştır. Bulgular: In vivo-ex vivo çalışmalarda ADP için 4a Prasugrel'e göre daha zayıf etkili 2a ve 3a daha yüksek etkili, epinefrin için 2a yüksek etkili bulunmuştur. 1a, 2a, 3a ve 4a tarafından TxB2 ve GpIIb/IIIa düzeyleri diyabetik gruplarda anlamlı biçimde inhibe edilmiştir. pAKT ve pERK2 ölçümlerinde, nondiyabetik gruplarda 1a, 2a, 3a ve 4a tarafından yüksek inhibisyon gerçekleşmiştir. VASP düzeyi için nondiyabetiklerde 2a anlamlı bir azalmaya neden olmuştur. In vitro antiplatelet ve antikanser çalışmalarında aktivite gözlenememiştir. Sonuçlar: In vivo-ex vivo çalışmalarda 2a ve 3a için baz Prasugrel'e yakın veya daha güçlü antiplatelet aktivite gözlenmiştir. In vitro antiplatelet ve antikanser çalışmalarında aktivite gözlenememiştir. Anahtar Sözcükler: Prasugrel, Tuz, Antiplatelet, Diyabet, Antikanser
