Person: KULABAŞ, NECLA
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
KULABAŞ
First Name
NECLA
Name
5 results
Search Results
Now showing 1 - 5 of 5
Publication Metadata only Novel fluoroquinolones containing 2-arylamino-2-oxoethyl fragment: Design, synthesis, evaluation of antibacterial and antituberculosis activities and molecular modeling studies(WILEY, 2022) TÜRE, ASLI; Kulabas, Necla; Ture, Asli; Bozdeveci, Arif; Krishna, Vagolu Siva; Karaoglu, Sengul Alpay; Sriram, Dharmarajan; Kucukguzel, IlkayNovel substituted fluoroquinolone derivatives, compounds 6-20 were designed, synthesized, and evaluated for antituberculosis and antibacterial activity. Antibacterial activities of the compounds were determined and compound 14 was found to be the most potent antimicrobial agent owing to minimal inhibitory concentration (MIC) value of <1.16 mu g/mu l for all tested bacteria. Further, compounds were tested in vitro for their antimycobacterial activity against Mycobacterium tuberculosis H37Rv. Most of the compounds showed antimycobacterial effects with 1.56-25.00 mu g/ml MIC values. Compounds 14 and 18 were found to be the most active derivatives due to their MIC at 1.56 mu g/ml. Selected compounds 11, 14, 17, and 18 were tested for M. tuberculosis DNA supercoiling assay and they had IC50 values within a range of 6.35-15 mu M. Mechanism of binding to DNA gyrase enzymes was evaluated using in silico molecular modeling studies and it was shown that compounds 6-20 adopt a similar binding mode as already known for fluoroquinolone drugs.Publication Metadata only Synthesis, molecular docking and evaluation of novel sulfonyl hydrazones as anticancer agents and COX-2 inhibitors(SPRINGER, 2020) KÜÇÜKGÜZEL, İLKAY; Senkardes, Sevil; Han, M. Ihsan; Kulabas, Necla; Abbak, Muruvvet; Cevik, Ozge; Kucukguzel, Ilkay; Kucukguzel, S. GunizIn trying to develop new anticancer agents, a series of sulfonylhydrazones were synthesized. All synthesized compounds were checked for identity and purity using elemental analysis, TLC and HPLC and were characterized by their melting points, FT-IR and NMR spectral data. All synthesized compounds were evaluated for their cytotoxic activity against prostate cancer (PC3), breast cancer (MCF-7) and L929 mouse fibroblast cell lines. Among them,N '-[(2-chloro-3-methoxyphenyl)methylidene]-4-methylbenzenesulfonohydrazide(3k)showed the most potent anticancer activity against both cancer cells with good selectivity (IC50 = 1.38 mu M on PC3 with SI = 432.30 and IC50 = 46.09 mu M on MCF-7 with SI = 12.94). Further investigation confirmed that3kdisplayed morphological alterations in PC3 and MCF-7 cells and promoted apoptosis through down-regulation of the Bcl-2 and upregulation of Bax expression. Additionally, compound3kwas identified as the most potent COX-2 inhibitor (91% inhibition) beside lower COX-1 inhibition. Molecular docking of the tested compounds represented important binding modes which may be responsible for their anticancer activity via inhibition of the COX-2 enzyme. Overall, the lead compound3kdeserves further development as a potential anticancer agent. [GRAPHICS] .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 Design, synthesis and molecular modeling studies on novel moxifloxacin derivatives as potential antibacterial and antituberculosis agents(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2019) TÜRE, ASLI; Ture, Asli; Kulabas, Necla; Dingis, Serap Ipek; Birgul, Kaan; Bozdeveci, Arif; Karaoglu, Sengul Alpay; Krishna, Vagolu Siva; Sriram, Dharmarajan; Kucukguzel, IlkayTwenty-one novel alkyl/acyl/sulfonyl substituted fluoroquinolone derivatives were designed, synthesized and evaluated for their anti-tuberculosis and antibacterial activity. The targeted compounds were synthesized by the introduction of alkyl, acyl or sulfonyl moieties to the basic secondary amine moiety of moxifloxacin. Structures of the compounds were enlightened by FT-IR, H-1 NMR, C-13 NMR and HRMS data besides elemental analysis. Compounds were initially tested in vitro for their anti-mycobacterial activity against Mycobacterium tuberculosis H37Rv using microplate alamar blue assay. Minimal inhibitory concentration (MIC) values of all compounds were found between > 25.00-0.39 mu g/mL while compounds 1, 2 and 13 revealed an outstanding activity against M. tuberculosis H37Rv with MIC values of 0.39 mu g/mL. Activities of compounds 1-21 against to a number of Gram-positive and Gram-negative bacteria and fast growing mycobacterium strain were also investigated by agar well diffusion and microdilution methods. According to antimicrobial activity results, compound 13 was found the most potent derivative with a IC50 value of < 1.23 mu g/mL against Staphylococcus aureus and clinical strain of methicillin-resistant clinical strain of S. aureus.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.