Browsing by Author "Kizildogan, Aslihan Kurt"

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Cytotoxicity, Apoptotic, Antioxidant and Antimicrobial Activity of Dictyota Dichotoma (Hudson) Jv Lamouroux 1809 Collected From Antalya Coast, Turkiye
(Pleiades Publishing inc, 2025) Arslan, Sevki; Abdelsalam, Amine Hafis; Kizildogan, Aslihan Kurt; Otur, Cigdem; Konus, Metin; Cetin, Dogan; Okudan, Emine Sukran
Current study was purposed to reveal the cytotoxic, apoptotic, antimicrobial and antioxidant potentials of oil extracted from Dictyota dichotoma (Hudson) J.V. Lamouroux 1809 collected from Antalya coast of Turkiye. Dictyota dichotoma oil showed better cytotoxic activity towards two different adenocarcinoma cell lines (Caco-2 (8.83 mu g/mL) and LnCap (10.86 mu g/mL)) compared to HEK293 cells (non-cancerous). Annexin V/PI staining and qPCR studies revealed that oil caused induction of apoptosis. Dictyota dichotoma oil inhibited the growth of Aspergillus niger ATCC 16404 and Enterococcus faecalis ATCC 29212. Nevertheless, the lower antioxidant activity of Dictyota dichotoma oil was determined compared with trolox standard for both DPPH and ABTS assays (4.8 fold less). In conclusion, Dictyota dichotoma oil has a promising potential in medical usage.
Synthesis and Evaluation of Antioxidant, Antimicrobial and Anticancer Properties of 2-(prop Derivatives
(Bentham Science Publ Ltd, 2019) Konus, Metin; Aydemir, Selahattin; Yilmaz, Can; Kivrak, Arif; Kizildogan, Aslihan Kurt; Arpaci, Pembegul Uyar
5-bromo-2-(prop-2-yn-1-yloxy)benzaldehyde (compound 3) and 3,5-di-tert-butyl-2-(prop-2-yn-1-yloxy)benzaldehyde (compound 5) were synthesized via nucleophilic substitution reactions. Compound 5 showed higher antioxidant capacity with respect to compound 3 in all the four different antioxidant activity methods used. Moreover, in phosphomolybdenum assay, compound 5, with 1.1 proportion value, showed almost the same total antioxidant capacity compared to universal trolox standard. Furthermore, Broth microdilution method and agar disc diffusion tests demonstrated that the same compound also exhibited good antibacterial activity towards the bacteria Bacillus subtilis. Finally, both of the benzaldehyde compounds showed high antifungal activity against Aspergillus niger. In this study, compound 5 (IC50: 54.3 mu g/ml) showed significant cytotoxic activity against breast adenocarcinoma cell line MCF-7 with respect to compound 3 (IC50: 173.4 mu g/ml).
A Thiophene Derivative, 2-Bromo Has Effective Anticancer Potential With Other Biological Properties
(Wiley-v C H verlag Gmbh, 2022) Yilmaz, Can; Pirdawid, Ahmed Othman; Babat, Ceylan Fidan; Konus, Metin; Cetin, Dogan; Kivrak, Arif; Kizildogan, Aslihan Kurt
Thiophene derivatives are studied intensively due to their anticancer, antimicrobial, antioxidant and some other clinically important properties. In this study, the biological properties of a new thiophene derivative, so called BMPT, with a moderate drug score of 0.29 were tested. BMPT showed selective cytotoxicity for LnCap, HepG2 and Caco-2 cancer cell lines with EC50 values of 138.573 mu M, 185.931 mu M, and 108.657 mu M, respectively, but not on the control cell line HEK293. The increased expressions were detected for caspase3, caspase8, caspase9 and Bax; but Bcl-2 expressions were decreased at cancer cell lines. BMPT decreased the total thiol content and total GST activities at HepG2 47 % and 40 %, respectively, and, molecular docking supported inhibitory models for GSTP1-1, GSTA1-1 and GSTM2-2 were mixed, uncompetitive and uncompetitive, respectively. BMPT also showed potent antibacterial activity against Staphylococcus aureus. Related with its selective inhibition on GST activities, BMPT is proposed to have significant apoptotic effect leaded by changes, especially, in caspase 3, Bcl-2 and Bax expressions.