Person: BİNGÖL ÖZAKPINAR, ÖZLEM
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BİNGÖL ÖZAKPINAR
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ÖZLEM
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Publication Metadata only Synthesis and antiproliferative evaluation of novel 2-(4H-1,2,4-triazole-3-ylthio)acetamide derivatives as inducers of apoptosis in cancer cells(ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 2016) ÖZSAVCI, DERYA; Kulabas, Necla; Tatar, Esra; Ozakpinar, Ozlem Bingol; Ozsavci, Derya; Pannecouque, Christophe; De Clercq, Erik; Kucukguzel, IlkayIn this study, a series of thiosemicarbazide derivatives 12-14, 1,2,4-triazol-3-thione derivatives 15-17 and compounds bearing 2-(4H-1,2,4-triazole-3-ylthio)acetamide structure 18-32 have been synthesized starting from phenolic compounds such as 2-naphthol, paracetamol and thymol. Structures and purity of the target compounds were confirmed by the use of their chromatographic and spectral data besides microanalysis. All of the synthesized new compounds 12-32 were evaluated for their anti-HIV activity. Among these compounds, three representatives 18, 19 and 25 were selected and evaluated by the National Cancer Institute (NCI) against the full panel of 60 human cancer cell lines derived from nine different cancer types. Antiproliferative effects of the selected compounds were demonstrated in human tumor cell lines K-562, A549 and PC-3. These compounds inhibited cell growth assessed by MTT assay. Compound 18,19 and 25 exhibited anti-cancer activity with IC50 values of 5.96 mu M (PC-3 cells), 7.90 mu M (A549/ATCC cells) and 7.71 mu M (K-562 cells), respectively. After the cell viability assay, caspase activation and Bcl-2 activity of the selected compounds were measured and the loss of mitochondrial membrane potential (MMP) was detected. Compounds 18, 19 and 25 showed a significant increase in caspase-3 activity in a dose-dependent manner. This was not observed for caspase-8 activity with compound 18 and 25, while compound 19 was significantly elevated only at the dose of 50 mu M. In addition, all three compounds significantly decreased the mitochondrial membrane potential and expression of Bcl-2. (C) 2016 Elsevier Masson SAS. All rights reserved.Publication Metadata only Antimicrobial, Antioxidant and Antiproliferative Activities of Novel Quinolones(WILEY-V C H VERLAG GMBH, 2020) BİNGÖL ÖZAKPINAR, ÖZLEM; Ceylan, Sule; Cebeci, Yildiz Uygun; Demirbas, Neslihan; Batur, Ozge Ozsen; Ozakpinar, Ozlem BingolThe compound (2) formed by esterification of dimethyl morpholine (1) was converted to acetohydrazide (3). Subsequently Schiff bases (4 a-d) and carboxy(thio)amide derivatives (5 a-e) were synthesized. Then 1,2,4-triazole (6 a-e), thia(oxa)zolidine (7 c,e) and thia(oxa)zol (8 c,e) derivatives were obtained by ring closure from carboxy(thio)amides. Mannich bases, which are containing quinolone were synthesized from 1,2,4-triazoles. The structures of newly synthesized compounds were illuminated by spectroscopic methods. Their antimicrobial (MIC method), antioxidant (DPPH, FRAP, and CUPRAC methods), and anticancer activities (MTT method) were examined. Results showed that most of the compounds exhibited good antimicrobial (<0.03-31.25 mu g/mL with MIC values) and antioxidant activities (IC50=0.001-0.004 with DPPH values). Also, some of the compounds have been found to have antiproliferative effects on the prostate (PC-3), liver (Hep3B), and breast (MCF-7) human cancer cells, and also these compounds did not have a cytotoxic effect on a normal cell.Publication Open Access Synthesis, in silico studies and cytotoxicity evaluation of novel 1,3,4-oxadiazole derivatives designed as potential mPGES-1 inhibitors(MARMARA UNIV, 2020-07-06) KÜÇÜKGÜZEL, İLKAY; Erensoy, Gizem; Ding, Kai; Zhan, Chang-Guo; Elmezayen, Ammar; Yelekci, Kemal; Duracik, Merve; Ozakpinar, Ozlem Bingol; Kucukguzel, IlkayA series of new 1,3,4-oxadizole derivatives containing thioether group, has been synthesized to investigate their mPGES-1 inhibitory activities. The synthesized compounds were also evaluated for their anticancer and COX-1/2 inhibitory activities. All compounds were checked for their purity using TLC and HPLC analyses. The melting points, elemental analysis, FT-IR, H-1-/C-13-NMR and LR-MS data were utilized for structural characterization. The most potent derivative was 2-[5-{[2-methyl-5-(propan-2-yl)phenoxy]methyl}-1,3,4-oxadiazol-2-yl)sulphanyl]-1-(phenyl)ethan-1-one 3a, which showed inhibitory activity against mPGES-1 with an IC50 of 4.95 mu M. Docking studies with mPGES-1 and COX-1/2 enzymes revealed their affinity and potential binding mechanism for the tested compounds.Publication Open Access Synthesis and Anticancer and Antimicrobial Evaluation of Novel Ether-linked Derivatives of Ornidazole(TURKISH PHARMACISTS ASSOC, 2020-02-01) KÜÇÜKGÜZEL, İLKAY; Senkardes, Sevil; Kulabas, Necta; Bingol Ozakpinar, Ozlem; Kalayci, Sadik; Sahin, Fikrettin; Kucukguzel, Ilkay; Kucukguzel, S. GunizObjectives: Some novel 1-(2-methyl-5-nitro-1H-imidazol-1-yl)-3-(substituted phenoxy)propan-2-ol derivatives (3a-g) were designed and synthesized. Materials and Methods: Compounds 3a-g were obtained by refluxing ornidazole (1) with the corresponding phenolic compounds (2a-g) in the presence of anhydrous K2CO3 in acetonitrile. Results: Following the structure elucidation, the in vitro antimicrobial activity and cytotoxic effects of compounds 3a-g on K562 leukemia and NIH/3T3 mouse embryonic fibroblast cells were measured. As a part of this study, the compliance of the compounds with the drug-likeness properties was evaluated. The physico-chemical parameters (log P, TPSA, nrotb, number of hydrogen bond donors and acceptors, logS) were calculated using the software OSIRIS. Conclusion: All the synthesized compounds except 3a showed significant activity (MIC=4-16 mu g mL(-)(1)) against the bacterial strain Bacillus subtilis as compared to the standard drug, whereas antileukemic activities were rather limited. Furthermore, all the compounds were nontoxic and the selectivity index outcome indicated that the antileukemic and antimicrobial effects of the compounds were selective with good estimated oral bioavailability and drug-likeness scores.