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Öğe A biochemical approach for hedysarum candidissimum from Turkey: Screening phytochemicals, evaluation of biological activites, and molecular docking study(Wiley-V C H Verlag Gmbh, 2022) Altay, Ahmet; Yeniçeri, Esma; Taslimi, Parham; Tok, Tuğba Taşkın; Yılmaz, Mustafa Abdullah; Köksal, Ekrem; 0000-0002-3171-0633; 0000-0002-0064-8400; 0000-0002-4090-7227; 0000-0002-1026-972X; 0000-0001-8120-8900This study was designed to screen the phytochemical composition and investigate the biological activities of Hedysarum candidissimum extracts and also support the results with molecular docking studies. LC/MS/MS analysis revealed the presence of 22 phytochemical constituents (mainly phenolic acids, flavonoids, and flavonoid glycosides) in the plant structure. The methanol extract exhibited the strongest antioxidant activity among all the extracts with its strong DPPH radical scavenging and iron reducing capacity, as well as high phenolic and flavonoid contents. Additionally, it was found to be the most promising acetylcholinesterase (AChE: IC50: 93.26 mu g/mL) and alpha-glycosidase (AG: IC50: 28.57 mu g/mL) inhibitory activities, supported by the major phenolics of the species through in silico studies. Ethyl acetate extract had the strongest cytotoxic effect on HT-29 (IC50: 63.03 mu g/mL) and MDA-MB-453 (IC50: 95.36 mu g/mL) cancer cell lines. Both extracts exhibited considerable apoptotic and anti-migrative effects on HT-29 cells. The investigations provide phyto-analytical and bio-pharmacological results which can be extended by in vivo studies in the future.Öğe The comparison with commercial antioxidants, effects on colour, and sensory properties of green tea powder in butter(Multidisciplinary Digital Publishing Institute (MDPI), 2023) Çakmakçı, Songül; Gülçin, İlhami; Gündoğdu, Engin; Öztekin, Hatice Ertem; Taslimi, ParhamOxidation is one of the most important factors limiting shelf life and is a major deterioration process affecting both the sensory and nutritional quality of food. The high oxidation stability of lipids, which can be improved by the addition of antioxidants, is important for health protection, food quality, and economic reasons. In recent years, research on plant-derived antioxidants for use in human health and food has steadily increased. The aim of this study was to compare the antioxidant effects of green tea powder (GTP) in butter with those of commercial antioxidants (BHA, BHT, α-tocopherol, and Trolox). In addition, the effects on colour, sensory, gross physicochemical properties, and β-carotene content were investigated in butter. After the separation of butter into five pieces, the first part was chosen as the control sample without GTP; the second part has 100 mg/kg of BHT added to it; and the third, fourth, and fifth parts had 1, 2, and 3% of GTP added in the samples. They were stored at 4 ± 1 °C. Analysis was performed at intervals of 15 days. According to the iron reduction, CUPRAC and FRAP methods were performed, and parallel results were observed. Using the radical elimination methods (ABTS, DPPH•, and DMPD•+), IC50 values were calculated for the samples. According to the IC50 values, the GTP-containing samples were good antioxidants. The total phenolic andf β-carotene contents increased as the GTP addition increased. The addition of GTP had an antioxidant capacity equal to or higher than that of the BHT-added sample. For the production of a sensory-pleasing, greenish-coloured, new functional butter, the 1% GTP addition showed the most positive results.Öğe LC-MS/MS analysis and diverse biological activities of Hypericum scabrum L.: In vitro and in silico research(Elsevier, 2022) Altay, Ahmet; Yeniceri, Esma; Taslimi, Parham; Taskin-Tok, Tugba; Yilmaz, Mustafa Abdullah; Koksal, EkremThis study was designed to determine the phytochemical composition of Hypericum scabrum extracts and investigate their biologically prominent activities. LC-MS/MS analysis revealed the presence of 29 phytochemicals in the plant extracts. The methanol extract (ME) exhibited the strongest DPPH radical scavenging (IC50: 18.57 mu g/mL) and ferric ion reducing capacity (74.20 mg TEAC/g). Besides, ME displayed the most promising a-glycosidase (IC50: 1.88 mu g/mL) and acetylcholinesterase AChE (IC50: 8.41 mu g/mL) inhibitory effect. The XTT assay results displayed the strong anti-proliferative activity of ME against MCF-7 (IC50: 56.45 mu g/mL) and MDA-MB-453 (IC50: 67.79 mu g/mL) cell lines. Flow cytometry studies confirmed the mitochondrial-dependent apoptotic effect of ME in MCF-7 cells. Finally, molecular docking studies revealed the best binding affinity of the compounds 1, 9, and 41 with AChE and alpha-Gly, while 41 exhibited the best affinity against caspase-3, caspase-9 and DNA. To conclude, this study provides essential data for further in vivo studies. (c) 2022 SAAB. Published by Elsevier B.V. All rights reserved.Öğe Phytochemical analysis and biological evaluation of hypericum linarioides bosse: in vitro and in silico studies(Wiley-V C H Verlag Gmbh, 2022) Altay, Ahmet; Yeniçeri, Esma Kübra Kağan; Taslimi, Parham; Tok, Tuğba Taşkın; Yilmaz, Mustafa Abdullah; Köksar, EkremThe aim of this study is to determine the phenolic composition of Hypericum linarioides Bosse, to assess its various biological properties, and finally to confirm the experimental data of enzyme inhibitions via docking studies. LC-MS/MS analysis performed over methanol extract (ME) revealed the presence of 27 phytochemicals. Antioxidant activity results indicated that ME had the strongest DPPH radical scavenging and ferric ion reducing capacity than water and hexane extracts. XTT assays revealed the strongest anti-proliferative activity of ME against MCF-7 and HT-29 cancer cells. Flow cytometry results also confirmed the notable apoptotic effect of ME on MCF-7 cells through mitochondria-dependent pathway. Enzyme activity results exhibited the most promising acetylcholinesterase and alpha-glycosidase inhibitory activities of the ME. Molecular docking calculations of alpha-glycosidase with the major compounds (1, 15, 17 and 19) indicated that 17 (isoquercitrin) had the best docking binding energy (-10.92 kcal/mol) with appropriate binding interactions.Öğe Phytochemical profile by LC-MS/MS analysis and evaluation of antioxidant, antidiabetic, anti-Alzheimer, and anticancer activity of Onobrychis argyrea leaf extracts(Elsevier Science Inc, 2024) Yeniceri, Esma; Altay, Ahmet; Koksal, Ekrem; Altin, Sevgi; Taslimi, Parham; Yilmaz, Mustafa Abdullah; Cakir, OguzIntroduction: Studies on different species of Onobrychis, a member of the Fabaceae family, have revealed a number of biological activities with potential applications in alternative medicine. The phytochemical content of the plant Onobrychis argyrea subsp. argyrea and some of the important biological activities linked to its metabolism are quite limited. Therefore, this study was the first to determine the content of secondary metabolites in this species and to elucidate important biological activities related to metabolism. Methods: LC-MS/MS was used for the quantitative analysis of bioactive compounds in the aerial part of O. argyrea extracts. The antioxidant properties of the extracts were assessed based on their ability to scavenge DPPH radicals and reduce iron ions. The anti-diabetic effect of the extracts was tested by the inhibition of alpha-amylase and alpha-glycosidase enzymes, and the anti-Alzheimer's ability was tested by the inhibition of the enzymes AChE and BChE. The cytotoxic effects of the extracts were tested on four different cancer lines, namely A-549, HT-29, MCF-7 and MDA-MB 453 using the XTT assay. The mechanism of the anti-cancer effect was determined by means of flow cytometry analysis on HT-29 cells. Results: Twenty-nine phytochemicals were identified via the LC-MS/MS analysis in the plant extracts. The most abundant phytochemicals in the extracts were quinic acid, isoquercitrin, epicatechin, and routine, respectively. Antioxidant analysis showed that among all extracts, methanol extract (ME) was most effective in scavenging DPPH (IC50: 23.93 +/- 0.96 mu g/mL) and in reducing iron ions (53.24 +/- 2.14 mgTEAC/g). Enzyme activity studies demonstrated that ME is a potent inhibitor of alpha-glycosidase (IC50: 15.06 +/- 0.64 mu g/mL), AChE (IC50: 24.75 +/- 0.76 mu g/mL), and BChE (IC50: 3.36 +/- 0.14 mu g/mL). XTT assay results disclosed the strongest anti-proliferative activity of ME against the human colorectal adenocarcinoma HT-29 cell line with an IC50 value of 33.35 +/- 0.92 mu g/mL. Flow cytometry analysis revealed that ME caused mitochondrial membrane damage in HT-29 cells (**p<0.01) and subsequently induced apoptosis (**p<0.01) by activating the caspase pathway (**p<0.001). Conclusion: O. argyrea, rich in bioactive compounds, showed remarkable antioxidant, antidiabetic, Alzheimer's, and anticancer properties in vitro, demonstrating that this plant contains secondary metabolites that may be potential drug candidates for the treatment of metabolic diseases.Öğe Unravelling the phenolic compound reserves, antioxidant and enzyme inhibitory activities of an endemic plant species, Achillea pseudoaleppica(Taylor & Francis, 2021) Yılmaz, Mustafa Abdullah; Taslimi, Parham; Kılıç, Ömer; Gülçin, İlhami; Dey, Abhijit; Bursal, ErcanThe present ethnobotanical study unravelled the phenolic reservoir (UHPLC-MS/TQ-MS) and pharmacological activity (antioxidant and enzyme inhibitory activities) of an endemic plant, Achillea pseudoaleppica Hub.-Mor. (Asteraceae). The effective antioxidant properties of ethanol and water extracts of A. pseudoaleppica leaves were determined by using six different in vitro bioanalytical methods including three reducing antioxidant methods and three radical scavenging antioxidant methods. In the other step of the study, the enzyme inhibitory effects of water and ethanol extracts of A. pseudoaleppica were determined against acetylcholinesterase (AChE), butyrylcholinesterase (BChE), alpha-amylase, and alpha-glucosidase enzymes. The ethanol extract was found to have effective inhibition potential for all four respected enzymes. The IC50 values of A. pseudoaleppica extract against AChE, BChE, alpha-amylase, and alpha-glucosidase enzymes were found to be 2.67 mg/mL, 4.55 mg/mL, 16.51 mg/mL, and 12.37 mg/mL, respectively. Also, UHPLC-MS/TQ-MS analyses revealed quinic acid as the most abundant phenolic compound of the water extract (31.12 +/- 1.65 mu g/mg) and ethanol extract (11.75 +/- 0.82 mu g/mg). In addition, the molecular docking interaction of the most abundant phenolic compound of A. pseudoaleppica (quinic acid) with AChE, BChE, alpha-amylase, and alpha-glucosidase target enzymes were evaluated using Chimera and AutoDock Vina softwares. In conclusion, the rich phenolic content and the potent antioxidant and enzyme inhibitory properties of A. pseudoaleppica extracts may support the widespread ethnobotanical use of the plant application. Communicated by Ramaswamy H. Sarma
