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Öğe Analysis of bioactive compounds using LC-ESI-MS/MS, cytotoxic, antimicrobial effects, and enzyme activities from Cyclotrichium origanifolium(Wiley, 2023) Aktepe, Necmettin; Baran, Ayse; Atalar, Mehmet Nuri; Baran, Mehmet Firat; Keskin, Cumali; Taskin, Abdullah; Yavuz, OemerCyclotrichium origanifolium is a medicinal plant belonging to the Lamiaceae family. In this study, phenolic content analysis, antimicrobial effects, and cytotoxic effects of extracts of C. origanifolium were investigated. In the extracts, phenolic compound analysis by the liquid chromatography-electrospray ionization-tandem mass spectrometry method, antimicrobial effect by the minimum inhibition concentration method, and cytotoxic effect on human dermal fibroblasts (HDF), glioblastoma cell (U87), ovarian adenocarcinoma cell (Skov-3), and human colorectal adenocarcinoma cell (CaCo-2) cancer cell lines were investigated. Cytotoxicity analyses were performed by the MTT method. In addition, the GST and AChE enzyme activities of the extracts were also measured. Around 18 compounds were detected in both the methanol and ethanol extract. It was found that the best antimicrobial effect on Gram-negative Pseudomonas aeruginosa was on methanol extract, while the ethanol extract was on Candida albicans fungus (respectively, 2.50 mg/ml, 5.0 mu g/ml). A 500 mu g/ml of methanol extract has been shown to have cytotoxic activity high effect on HDF cells. GST and AChE activity were found to decrease in a concentration-dependent manner.Öğe Determination of chemical components of the endemic species Allium turcicum L. plant extract by LC-MS/MS and evaluation of medicinal potentials(Elsevier Ltd, 2024) İpek, Polat; Atalar, Mehmet Nuri; Baran, Ayşe; Baran, Mehmet Fırat; Ommati, Mohammad Mehdi; Karadağ, Musa; Zor, MuratThe Allium turcicum L. (Zuzubak) plant as a cultivated vegetable have various health benefits and consumed as a food. Due to the shortcoming evidence in literature and the importance of this plant in folk medicine, in the present study, for the first time, we evaluated the bioactive profile of components (using LC-MS/MS), cytotoxicity, anticancer, antioxidant, and antibacterial prospectives of Zuzubak methanol extract. Reported results show that the extract is rich in bioactive compounds and has anticancer activity with breast cancer cells (MCF-7), human prostate cancer cells (DU-145), and Human osteosarcoma cancer Cell lines of (IC50) in dose dependent manner in the concentration range of 31.25 ?g/mL and 2000 ?g/mL for 24 and 48 h. Western blotting results determined that the extract significantly suppressed the growth of U2OS, MCF-7, and DU-145 cancer cells by down expression of Ang-1 (angiogenic protein) and Beclin-1 (autophagy protein) and overexpression of Bax (a proapoptotic protein). The oxidative stress indices showed a reduction in RPE-1 and MCF-7 cells and an upsurge in U2OS and DU-145 cells. Additionally, the antimicrobial assay showed suppression of the growth of various pathogenic microorganisms in 4.00–8.00 ?g/concentrations of Zuzubak extract using the microdilution method. The phytochemicals identified showed promising anticancer, antioxidant effects, and antimicrobial properties, representing a valuable herbal source for drug development studies. © 2024 The AuthorsÖğe Determination of chemical composition and antioxidant, cytotoxic, antimicrobial, and enzyme inhibition activities of Rumex acetosella L. plant extract(Springer Int Publ Ag, 2024) Kandemir, Sevgi İrtegun; Aktepe, Necmettin; Baran, Ayse; Baran, Mehmet Fırat; Atalar, Mehmet Nuri; Keskin, Cumali; Karadağ, MusaPurpose The phenolic composition, antioxidant, antimicrobial activity, enzyme inhibition activity, and cytotoxic activity potentials of the plant Rumex acetosella L. (R. acetosella) were examined in this study. Materials and Methods: The chemical composition of R. acetosella methanol extract was identified by the LC-MS/MS method. The antioxidant activity was tested using beta-carotene/linoleic acid, DPPH free radical scavenging, ABTS cation radical scavenging, CUPRAC reducing power, and metal chelating activity methods. The cytotoxic activity was determined by the MTT assay using human ovarian adenocarcinoma (Skov-3), glioblastoma (U87), human dermal fibroblasts (HDF), and human colorectal adenocarcinoma (CaCo-2) cell lines. The antimicrobial activity of methanolic extracts was tested on gram-negative (Escherichia coli and Pseudomonas aeuriginosa) and gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis) using the in vitro minimum inhibition concentration method (MIC). Enzyme inhibition activity of R. acetosella methanol extract was measured spectrophotometrically against acetylcholinesterase (AChE) and glutathione S-transferase (GST) enzymes. Results: The findings showed that the major components of the methanol extract content were luteolin-7-O-glucoside (1.599 m/L), polydatin (91,024 m/L), and shikimic acid (0.773 m/L). It was determined that the extract and standard antioxidant (a-tocopherol) results in DPPH center dot, and ABTS center dot + tests performed to determine the antioxidant activity were close to each other, and this value was more effective than the standard antioxidant (alpha-tocopherol) in the CUPRAC test. These results suggested that the plant's antioxidant potential was higher when compared with reference antioxidant compounds. It was determined that the methanol extract of R. acetosella had a weaker effect on the growth of the tested microorganisms than the antibiotics used as standard. The activity of the GST and AChE enzymes was found to be severely inhibited by the methanol extract of R. acetosella. Conclusion: Based on these findings, R. acetosella L. is a medicinal and commercially beneficial plant that warrants further investigation.Öğe Economic fast synthesis of olive leaf extract and silver nanoparticles and biomedical applications(Taylor & Francis Inc, 2022) Atalar, Mehmet Nuri; Baran, Ayse; Baran, Mehmet Firat; Keskin, Cumali; Aktepe, Necmettin; Yavuz, Omer; Kandemir, Sevgi IrtegunIn this study, silver nanoparticles (AgNPs) were synthesized economically and simply using an environmentally friendly method with the extract obtained from agricultural waste olive leaves. AgNPs synthesized according to the analysis data were determined to have maximum absorbance at 433.5 nm wavelength, spherical appearance, 7.2 nm crystal nano size and -19.9 mV zeta potential. It was determined by the microdilution method with Minimum Inhibition Concentration (MIC) that AgNPs exert a suppressive effect on the growth of pathogen gram-negative, positive bacteria and yeast at very low concentrations. The cytotoxic effects of the particles were investigated on healthy cell lines (HDF) and cancerous cell lines (U118, CaCo-2, Skov-3). AgNPs showed up to 70% suppression in cancer cell lines.Öğe Enzyme inhibitory function and phytochemical profile of Inula discoidea using in vitro and in silico methods(Elsevier, 2021) Bursal, Ercan; Yılmaz, Mustafa Abdullah; İzol, Ebubekir; Türkan, Fikret; Atalar, Mehmet Nuri; Murahari, Manikanta; Aras, Abdulmelik; Ahmad, MushtaqMany plant species have a large diversity of secondary metabolites with different biological activities. This study aims to assess the phenolic constituent, enzyme inhibitory and antioxidant activities of the aqueous (water) and methanol extracts of Inula discoidea. The enzyme assays showed effective enzyme inhibition of the methanol extract against acetylcholinesterase (AChE), butyrylcholinesterase (BChE), glutathione S-transferase (GST), and alpha-glycosidase (alpha-Gly) enzymes. The IC50 values for AChE, BChE, GST, and alpha-Gly were found as 38.5 mg/mL, 34.65 mg/mL, 77.0 mg/mL, and 40.76 mg/mL, respectively. Antioxidant properties of the aqueous and methanol extracts of I. discoidea were determined by four well-known in vitro techniques (ABTS, CUPRAC, DPPH, and FRAP methods). The antioxidant values of both water and methanol extracts were found to be better than the standard antioxidants (BHA, BHT, ascorbic acid, and alpha-tocopherol) in ABTS and CUPRAC methods. According to an updated LC-MS/MS technique analysis, quinic acid (21.08 mg/g), protocatechuic acid (4.49 mg/g), and gallic acid (0.48 mg/g) were found as major phenolic compounds of the plant extract. The binding interactions of major phenolic compounds of I. discoidea with the AChE, BChE, GST, and alpha-Gly enzymes were investigated by the molecular docking studies.Öğe Green synthesis, characterization of gold nanomaterials using gundelia tournefortii leaf extract, and determination of their nanomedicinal (Antibacterial, antifungal, and cytotoxic) potential(Hindawi LTD, 2022) Keskin, Cumali; Baran, Ayşe; Baran, Mehmet Fırat; Hatipoğlu, Abdulkerim; Adican, Mehmet Tevfik; Atalar, Mehmet Nuri; Yavuz, Ömer; Kandemir, Sevgi İrtegünIntroduction. Fighting against cancer and antibiotic resistance are important challenges of healthcare systems, and developing new treatment methods has become the most concentrated area of researchers. Method and Materials. Green synthesis, characterization, and some biological activities of gold nanomaterials (AuNPs) obtained with Gundelia tournefortii (kenger) leaf extract were investigated in this study. Fourier scanning electron microscope, UV-visible spectrophotometer, Fourier transform infrared spectroscopy, energy-dispersive X-ray spectrophotometer, X-ray diffraction diffractometer, transmission electron microscope, and Zetasizer instrument data were used to elucidate the structures of nanoparticles. Results. The maximum surface plasmon resonance was observed at 532.15 nm after 1 hour. With the powder XRD model, the mean cubic crystallite size was determined as 23.53 nm. It was observed that the shapes of the obtained AuNPs were spherical, and the dimensions were 5-40 nm and hexagonal. Surface charges (-27 mV) and average size (365.3 nm) of gold nanoparticles were measured with a zeta analyzer. Conclusion. The suppressive effects of AuNPs on the growth of pathogenic microorganisms and healthy and cancer cell lines were determined using the MIC and MTT methods, respectively.Öğe Green-synthesized nanoparticles for biomedical sensor technology(Elsevier, 2024) Baran, Ayse; Baran, Mehmet Fırat; İpek, Polat; Eftekhari, Aziz; Keskin, Cumali; Atalar, Mehmet Nuri; Alma, Mehmet HakkıSensor technology is an integral part of the many cost-effective and efficient factors possible in modern medical devices. Biosensors have good potential as they are easy, scalable, and effective in manufacturing processes. Nanotechnology has become one of the promising technologies applied in all fields of science. Biotechnologically produced metallic nanoparticles (NP) attract attention in scientific applications and technology platforms due to their extensive applications in biomedical and physiochemical fields. In recent years, the side effects caused by the use of synthetic drugs and the medical and economic problems caused by them have made the use of plants popular again. Ecofriendly, nontoxic metal-based NPs (such as gold, silver, palladium, manganese, and zinc) smaller than 100nm in size can be synthesized with extracts obtained from plants by different methods. As the sizes and shapes of NPs change, the physical, chemical, bioactive, optical, electrical, catalytic, and toxicity properties of the particles also change. Biological synthesis, also known as green synthesis, is a practical method to obtain NPs easily and ecologically without the need for high pressure, high-temperature values, and toxic chemicals. Green synthesis of NPs is carried out using different biomaterials such as bacteria, fungi, yeast, viruses, microalgae, and plant biomass/essence. Plant-mediated biosynthesis of metallic NPs occurs through biomolecules containing organic functional groups in the plant. Nanobiosensors, analytical devices combining a biologically sensitive element with a nanostructured transducer, are widely used for the molecular detection of biomarkers associated with the diagnosis of diseases and the detection of infectious organisms. Nanobiosensors show certain advantages over laboratory and many field methods due to their inherent specificity, simplicity, and rapid response. In this study, advancements in the development of nanobiosensors are illuminated. Considering all these aspects, it can be said that nanobiosensors enable diagnostic tools with increased sensitivity, specificity, and reliability for medical applications. © 2025 Elsevier Inc. All rights reserved.Öğe Phytochemical analysis and biological activity of Corchorus olitorius L.: Quantitative analysis of bioactive compounds by LC–MS/MS, antibacterial, enzyme inhibition, and cytotoxic activities(Elsevier GmbH, 2023) Atalar, Mehmet Nuri; Erenler, Ramazan; Turkan, Fikret; Alma, Mehmet Hakkı; Demirtaş, İbrahim; Baran, Ayşe; Kandemir, Sevgi İrtegünIntroduction: Corchorus olitorius L. is a significant plant in folk medicine, therefore, research on phytochemistry with biological activity may reveal its potential use in drug development. Medicinal plants are valuable sources of drug materials as they include bioactive compounds known as secondary metabolites. Determination of bioactive compounds and biological activity of plants lead to understanding their potential in drug development. Methods: A quantitative analysis of the bioactive compounds in leaf, stem, and root extracts of C. olitorius L. was carried out with Liquid Chromatography-Mass Spectrometry (LC–MS/MS). Acetylcholinesterase (AChE) and Glutathione-S-Transferase (GST) enzyme inhibition and antibacterial effects were investigated using Mueller Hinton broth microdilution assay. The anticancer activity of C. olitorius leaves was evaluated by MTT assay using HDF, U87, Skov-3, and Caco-2 cell lines. Results: In the quantitative study, leaf extract exhibited the largest concentration of bioactive compounds, and cynarin (6.680 mg/g extract) and chlorogenic acid (5.605 mg/g extract) were the major products. The leaf, stem, and root extracts showed significant AChE and GST inhibition activity. The leaf extract displayed antibacterial activity against P. aeruginosa with the value of 2.2±0.1 (IC50, μg/ mL) in comparison to the standard (4.00±0.1 IC50, μg/ mL). The leaf extract displayed good antiproliferative activity against sk-ov-3 cell lines with values of 37.1% and 42.1% at 250 μg/mL and 500 μg/mL concentrations, respectively. Conclusion: C. olitorius has the potential to be a drug agent against cancer and microbial-induced diseases due to its effective bioactive compound contents.Öğe The Characterization of Silver Nanoparticles Synthesized From Prunus spinosa Fruit and Determination of Antimicrobial Effects on Some Food Pathogens(RDCONF, 2021) Atalar, Mehmet Nuri; Baran, Ayşe; Hatipoğlu, Abdulkerim; Baran, M.firat; Yavuz, Ömer; Aktepe, Necmettin; Keskin, CumaliBu çalışmada, gümüş nanopartiküller (AgNP'ler) Prunus spinosa (PS) meyve özütü kullanılarak kolay, düşük maliyetli ve çevre dostu bir şekilde sentezlendi. Ultraviyole (UV)-görünür Spektrofotometre analiz verilerine göre, nanokristaller 438.3 nm'de karakteristik bir tepe noktası gösterdi. Alan Emisyon Taramalı Elektron Mikroskobu (FE-SEM), Transmisyon Elektron Mikroskobu (TEM) ve Atomik Güç Mikroskopisi (AFM) analizleri, biyosentezlenen AgNP'lerin morfolojik yapılarının küresel olduğunu ortaya koydu. XRD analizi sonuçlarına göre AgNP'lerin kristal yapılarının kübik olduğu belirlendi. Nanopartiküllerin boyutu, Debye-Scherrer denklemi ile 29,34 nm olarak hesaplandı. Sentezlenen nanomalzemenin zeta boyutu 117.4 nm olarak ölçülmüştür. AgNP’lerin gıda patojenleri olan Bacillus subtilis, Pseudomonas aeruginosa, Staphylococcus aureus ATCC 29213, Escherichia coli ATCC25922 ve Candida albicans üzerindeki inhibisyon etkileri Minimum İnhibitör Konsantrasyon (MİK) yöntemiyle ortaya konuldu.
