Mehmet Boga

Antioxidant, Antimicrobial, Cytotoxic and Anticholinesterase Activities of SevenMushroom Species with their Phenolic Acid Composition

The study focused to evaluate cytotoxic, antioxidant, antimicrobial and anticholinesterase activities of methanol extracts of Pleurotus ostreatus Jacq. (Pleurotaceae), Boletus edulis Bull. (Boletaceae), Tricholoma populinum J. (Tricholomataceae) Helvella queletii Bres. (Helvellaceae), Armillaria tabescens Emel. (Physalacriaceae), Psathyrella candolleana Fr. (Psathyrellaceae) and Helvella leucopus Pers. (Helvellaceae) mushroom species. Phenolic acid profiles of these mushrooms were also determined to obtain further information on the correlation between the contents of phenolic compounds and studied activities. Cytotoxic activity of mushrooms was screened by MTT cytotoxicity assay on cancer (HeLa) and normal epithelium (NRK-52E) cell lines. To determine antioxidant potential of mushroom extracts free radical scavenging, reducing power, superoxide anion radical scavenging, total antioxidant and metal chelating activities were studied, To indicate anthicholinesterase activity the acetyl-and butyrylcholinesterase inhibitory activities of the mushroom extracts were studied. For antimicrobial activity disc diffusion method was applied. Phenolic profile of mushrooms were determined by HPLC system. The IC50 values of the extracts were 1.58-25.11 and 2.05-22.32 mg/mL for HeLa and NRK-52E cells, respectively. At antimicrobial activity the inhibiton zones were found to be as 1 ± 0.12-13 ± 0.23 mm. P. ostreatus, B. edulis and H. leucopus extracts were showed higher activities than the other mushroms at antioxidant, antimicrobial, anticholinesterase and cytotoxic activity.

Chemical Profile and Biological Activities of Two Edible Plants: Chemical Investigation and Quantitative Analysis Using Liquid Chromatography Tandem Mass Spectrometry and Gas Chromatography Mass Spectrometry

The objectives of this study were to define the phenolic and fatty acid profiles, anticholinesterase, antioxidant, antimicrobial activities, and total phenolic-flavonoid contents of Lycopsis orientalis and Tragopogon latifolius var. angustifolius which have been used as food source and food supplement in Anatolia and have never been examined before. Rosmarinic and quinic acids (21.11 and 11.46 mg g–1 extract, respectively) were found to be the most abundant constituents in L. orientalis and T. latifolius var. angustifolius among the studied 27 compounds by liquid chromatography tandem mass spectrometry. In the fatty acid compositions of L. orientalis and T. latifolius var. angustifolius that were determined by gas chromatography mass spectrometry, oleic (29.1%) and palmitic (28.7%) acids were identified as the major components, respectively. The high antioxidant activity of the methanol extract of L. orientalis shows parallelism to its rosmarinic acid content. Besides, this extract showed medium anticholinesterase activity. The results of the present study proves that the L. orientalis might also be used as a food source due to its high phenolic acid content and strong antioxidant property.

Chemical Composition of The Essential Oils of Three Centaurea Species Growing Wild in Anatolia and Their Anticholinesterase Activities

Abstract This report represents the first study on the chemical composition of essential oil of endemic Centaurea lycopifolia. This report also represents the first study on the anticholinesterase activity of essential oils of C. lycopifolia, C. balsamita and C. iberica. Essential oils were obtained using a Clevenger apparatus by hydrodistillation from the whole parts of C. lycopifolia, C. balsamita and C. iberica. The essential oils composition of the plants were determined by GC-FID and GC-MS (gas chromatograph/mass spectrometry) analysis. The major component of the essential oils was identified as caryophyllene oxide (9.7 %) and spathulenol (7.3 %) for C. lycopifolia, α-selinene (8.5 %) and hexatriacontane (8.3 %) for C. balsamita and arachidic acid (25.3 %) and hexadecanoic acid (5.9 %) for C. iberica. The essential oils of three Centaurea species indicated moderate inhibitory effect against butyrylcholinesterase and acetylcholinesterase enzyme, at 200 µg/mL.

Determination of cytotoxic, anticholinesterase, antioxidant and antimicrobial activities of some wild mushroom species

Abstract In the performed study of methanol extraction of wild edible mushroom species; Agaricus arvensis, Agaricus campestris, Armillaria mellea, Fomes fomentarius, Coprinus micaceus, Coriolus versicolor and Lactarius deliciosus were examined for screening their cytotoxic, anticholinesterase, antioxidant and antimicrobial capacity. Phenolic acid composition of mushrooms was also analysed. L. deliciosus and F. fomentarius were generally showed the highest activities at antioxidant test systems (metal chelating, superoxide anion radical scavenging, total antioxidant, 2,2-diphenyl-1-picrylhydrazyl radical scavenging and reducing power activity tests). The highest activities at antimicrobial activity displayed by A. arvensis and as 18 ± 0.8 against to Staphylococcus aureus. The best IC50 values of mushroom methanol extracts at anticancer activities on HeLa and NRK-52E were 7.09 and 18.23 mg/mL exhibited by C. micaceus and A. campestris, respectively. The highest butyrylcholinesterase activity exhibited by L. deliciosus. Total amount of phenolic acids were found as 1,224.70 mg/kg at L. deliciosus.

Essential oil compositions and anticholinesterase activities of two edible plants Tragopogon latifolius var. angustifolius and Lycopsis orientalis.

This is the first report in the literature on essential oil compositions of Tragopogon latifolius var. angustifolius and Lycopsis orientalis which were analysed by using GC-FID and GC–MS techniques. The main constituents of T. latifolius var. angustifolius were identified as α-selinene (10.5%), 2,5-di-tert octyl-p-benzoquinone (9.5%) and valencene (7.0%); however, the main components of L. orientalis were identified as heptacosane (10.5%), τ-muurolene (9.6%) and tetratetracontane (9.4%). The essential oils of T. latifolius var. angustifolius and L. orientalis species exhibited moderate inhibitory activity against acetyl- and butyryl-cholinesterase enzymes at 200 μg/mL.

A comprehensive LC–MS/MS method validation for the quantitative investigation of 37 fingerprint phytochemicals in Achillea species: A detailed examination of A. coarctata and A. monocephala

HIGHLIGHTSA comprehensive LC–MS/MS method validation to quantify 37 phytochemicals in plants.The developed method is applicable to all plant species as well as Achillea.The studied species might be a source for chlorogenic acid, rutin and apigenin.A. monocephala; promising species in terms of antioxidant and cytotoxic activities. ABSTRACT The current study aims to optimize and validate a comprehensive LC–MS/MS method for the quantification of 37 phytochemicals (15 phenolic acids, 17 flavonoids, 3 non‐phenolic organic acids, 1 phenolic aldehyde and 1 benzopyrene) in Achillea species. Though Achillea species were chosen as real life samples, the current method is applicable to a wide range of plant species. The developed method was fully validated in terms of linearity, accuracy (recovery), inter‐day and intra‐day precision (repeatability), limits of detection and quantification (LOD/LOQ) and relative standard uncertainty (U% at 95% confidence level (k=2)). Reversed‐phase ultrahigh performance liquid chromatography was optimized to achive optimum separation for 37 phytochemical compounds and to overcome the suppression effects. MS detection was performed using a triple quadrupole mass spectrometer and negative or positive ionization modes were optimized for each analyte. Multiple reaction monitoring (MRM) was used to quantify the analytes, related molecular ions and transition ions were optimized. Phytochemical screening of ethanol and methanol‐chloroform extracts of root and aerial parts of A. coarctata and A. monocephala were performed by using the developed and validated LC–MS/MS method. Root and aerial parts of both species have considerable amounts of certain phenolic‐nonphenolic acids (quinic, malic, fumaric, chlorogenic and vanillic acids) and flavonoids (rutin, hesperidin, isoquercitrin, apigetrin, luteolin, apigenin). Additionally, total phenolic and flavonoid amounts, antioxidant (DPPH free radical scavenging assay, ABTS radical cation decolorization assay, &bgr;‐carotene lipid peroxidation test system and CUPRAC cupper reduction capacity methods), anticholinesterase, tyrosinase, urease inhibition and cytotoxic activities (on HeLa (Human Cervical Carcinoma Cell Line) of A. coarctata and A. monocephala were also investigated. It has been determined that the studied Achillea species, that are rich in total phenolic‐flavonoid and chlorogenic acid contents, have high antioxidant and cytotoxic potential at the same time. According to the results of LC–MS/MS, antioxidant and cytotoxic activity studies, after detailed chemical investigation and toxicity studies on these species, A. coarctata and A. monocephala may be promoted as promising sources of natural agents and used for the development of nutraceuticals or functional food ingredients in future.

CHEMICAL CONSTITUENTS, CYTOTOXIC, ANTIOXIDANT AND CHOLINESTERASES INHIBITORY ACTIVITIES OF SILENE COMPACTA (FISCHER) EXTRACTS

Abstract In Turkey, Silene species have been used as infusion in urinary bladder and biliary tract diseases in traditional medicine. Silene species have been also consumed as food in Anatolia and Europe. In this study, the phenolic, fatty acid and essential oil profiles and the cytotoxic, antioxidant and cholinesterases inhibitory activities, and total phenolic-flavonoid content of Silene compacta Fischer (SC) were studied. The essential oil and fatty acid compositions of S. compacta were determined by using GC/MS in the current study. The chemical composition of the methanol extract was determined using LC-MS/MS for quantitative and qualitative purposes. The major components of the essential oil and fatty acid were identified as α-selinene (12.4%) and palmitic acid (26.3%), respectively. The methanol extract (SCM: S. compacta methanol extract) which possessed the best activity in four tested antioxidant methods among the tested extracts exhibited very strong cholinesterases inhibitory activities. Additionaly, this extract indicated the highest cytotoxic effect against A549 cells. In the SCM extract, hesperidin and rutin, quinic and malic acids were quantified by LC-MS/MS as major contituents. Keywords: Silene compacta , LC-MS/MS, fatty acid, essential oil, anticholinesterase, antioxidant, cytotoxicity.

Essential Oil Composition of an Uninvestigated Centaurea Species from Turkey: Centaurea patula DC.

Abstract Centaurea patula is widely distributed in the Central Anatolia Region of Turkey. The essential oil of C. patula was obtained by hydrodistillation and analyzed by GC-FID and GC-MS techniques. Twenty-one components were identified representing 86.4% of the oil. Spathulenol (14.6%), n-hexadecanoic acid (13.4%), 1-pentadecene (13.1%) and phytol (12.4%) were found to be the major components in this oil. This work is the first report on the chemical composition of the essential oil of C. patula. The results could be valuable for the Centaurea genus in terms of essential oil information’s.

Chemical profile and biological activities of Veronica thymoides subsp. pseudocinerea

Abstract Context: In Turkey, Veronica species (Plantaginaceae) have been used as a diuretic and for wound healing in traditional medicine. Objective: To examine the fatty acid and essential oil profiles, the antioxidant, anticholinesterase, antimicrobial, and DNA damage effects of Veronica thymoides P.H. Davis subsp. pseudocinerea M.A. Fischer as a potential source of natural active compounds. Materials and methods: GC/MS was used to analyze essential oil and fatty acid obtained from whole plant. The antioxidant activity was evaluated by the β-carotene-linoleic acid test system, DPPH-free and ABTS cation radicals scavenging, and cupric reducing antioxidant capacity assays. The anticholinesterase and antimicrobial activities were determined by Ellman and broth macrodillution methods, respectively. The effect of the methanol extract on DNA cleavage was investigated. Results: Hexatriacontene (21.0%) was found to be the main constituent in essential oil, and linoleic acid (25.2%) and palmitic acid (20.6%) in fatty acid. Methanol extract demonstrated the best IC50 values in lipid peroxidation (49.81 ± 0.31 µg/ml) and DPPH-free radical scavenging activity (15.32 ± 0.17 µg/ml). Methanol and water extracts possessed strong ABTS cation radical scavenging activity with IC50 values 9.15 ± 0.28 and 8.90 ± 0.14 µg/ml, respectively. The acetone extract exhibited moderate butyrylcholinesterase inhibitory activity. The highest antimicrobial activity was determined in methanol extract against Escherichia coli with 31.25 µg/ml MIC value. Inhibition of methanol extract on plasmid DNA cleavage by OH radicals was found to be 93.32% at 500 µg/ml. Conclusion: The methanol extract having strong antioxidant and DNA damage effects could be investigated phytochemically to find natural active compounds.