Tugberk Kandemir

Bio: Tugberk Kandemir is an academic researcher from Sakarya University. The author has contributed to research in topics: Protonation & Zinc. The author has co-authored 1 publications.

The Evaluation of Anticancer, Antioxidant, Antidiabetic and Anticholinergic Potentials of Endemic Rhabdosciadium microcalycinum Supported by Molecular Docking Study

Abstract: Lung cancer is the most common cancer worldwide and the leading cause of cancer-related death. Plant-derived natural products and compounds are an inspiring source of chemotherapeutic agents. Alzheimer's disease (AD) is linked to the decline of acetylcholine (ACh) effects in the brain, so acetylcholinesterase (AChE) inhibitors are important in the treatment of AD. In this study, the chemical components and bioactivity of ethanolic extract of Rhabdosciadium microcalycinum (RM) was investigated by various methods. The lipophilic components of RM was determined by gas chromagraphy-mass spectrometry (GC-MS). Antioxidant activicty tests were evaluated with FCAP (Ferrous chelating antioxidant power assay), FRAP (Ferric reducing antioxidant power assay), ABTS (2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt assay) and DPPH (2,2-diphenyl-1-picrylhydrazyl assay). The anticancer effect of RM was evaluated by WST-1 (4-[3-(4-iodophenyl)-2-(4-nitrophenyl)-2H-5-tetrazolio]-1,3-benzene disulfonate), colony formation, wound healing and CDDE (cell death detection Elisa) analysis on A549 lung cancer cells. Enzyme inhibition effects of RM was determined against AChE and α-glycosidase (AG) enzymes. According to the results of molecular docking found in the study; With a docking score of −4.56 for HP5 protein, −6.23 for BXO protein, −5.25 for AFI protein, −3.90 for gly protein and −7.74 for AChE protein, Telecinobufagin molecule was found to have higher activity than other molecules. After docking calculations, Absorption, Distribution, Metabolism, Excretion and Toxicity (ADME/T) analysis was performed to examine the effects and reactions of molecules on human metabolism. RM inhibited the viability of A549 cells dose-dependent manner (IC50=117.15±8.58 μg/mL), and it was also observed that RM suppressed colony formation, prevented cell migration and directed the cells to apoptosis. RM has important lipophilic components, and significant antioxidant and enzyme inhibition potential. IC50 values of RM for AChE and AG enzymes were found as 35.86 mg/mL, and 10.14 mg/mL, respectively. In conclusion, the findings of this study reveal that ethanol extract from the aerial part of Rhabdosciadium microcalycinum may be a potential therapeutic agent for the treatment of human lung cancer and Alzheimer's disease, due to its phytochemical components.

Quinoline‐fused both non‐peripheral and peripheral Zn II and Mg II phthalocyanines: Anti‐cholinesterase, anti‐α‐glucosidase, DNA nuclease, antioxidant activities and in silico studies

Abstract: Quinoline-fused ZnII (ZnPcp/ZnPcnp) and MgII (MgPcp/MgPcnp) phthalocyanines with four 4-methylquinolin-2-ol (1) at non-peripheral or peripheral positions of the phthalocyanine core have been synthesized via cyclotetramerization of phthalonitrile derivatives (CNp/CNnp) in the presence of zinc (II) and magnesium (II) metal ions in this study. After synthesis and characterization processes, anti-cholinesterase, anti-α-glucosidase, DNA nuclease, antioxidant activities, and in silico calculations of both peripheral and non-peripheral ZnII and MgII phthalocyanines were investigated. The inhibitory effects of metallated phthalocyanines on acetylcholinesterase, butyrylcholinesterase, and α-glucosidase enzymes were tested by spectrophotometric method. Theoretical methods are used to compare both the chemical and biological activities of the studied phthalonitrile derivatives and metallated phthalocyanine compounds.

Investigation of photocatalytic properties of cobalt phthalocyanines on benzyl alcohol photoxidation

Abstract: Photocatalysis is a fast and economically attractive option for oxidation reactions. Herein, 4-(5-iodopyridin-2-yloxy)phthalocyaninato cobalt(II) (P-CoPc) and 4-(4-methylquinolin-2-yloxy)phthalocyaninato cobalt(II) (Q-CoPc) were synthesized and characterized with spectroscopic data (FT-IR, UV-Vis, and mass spectra). The parameters affecting the photocatalytic activity such as substrate amount, oxidant type, substitution group, and solvent effect were studied. Both catalysts show high benzaldehyde selectivity with high TON and TOF values (470 and 1880 for P-CoPc and 375 and 1500 for Q-CoPc, respectively). The best photoxidation conditions were determined that 1/1500/500 (cat/subs./ox. ratio) in DMSO and in the presence of light. Aggregation and photodegradation studies of P-CoPc and Q-CoPc have also carried out in this work.