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  • Küçük Resim
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    Antioxidant, anticholinesterase activities and polyphenolic constituents of cones of algerian fir (Abies numidica) by LC-ESI-MS/MS with chemometric approach
    (Marmara University, 2021) Mokaddem-Daroui, Habiba; Mostefa, Maya Belhadj; Aydoğmuş-Öztürk, Fatma; Erol, Ebru; Öztürk, Mehmet; Ertaş, Abdulselam; Duru, Mehmet Emin; Kabouche, Ahmed; Kabouche, Zahia
    The fractions (Fr.1-5) of the hydromethanolic extract of Abies numidica cones were studied for their polyphenol constituents, antioxidant, and anticholinesterase activities. The beta-carotene-linoleic acid, cupric reducing power (CUPRAC), DPPH scavenging, and ABTS radical scavenging assays were used to determine antioxidant activity. Fr.3 exhibited the highest antioxidant activity in ABTS test (IC50: 1.29 mu g/mL), b-carotene-linoleic acid test (IC50: 18.6 mu g/mL) and CUPRAC (A(0.5): 33.8 mu g/mL) assays. Three fractions (Fr.2-4) promising antioxidant activity were analyzed using LC-MS/MS for their phenolic compositions. Taxifolin (155.9-2816.2 mu g analyte/g extract), hyperoside (353.0-2045.5 mu g/g), vanillin (1488.9-1529.9 mu g/g), tannic acid (1281.6-1416.8 mu g/g), rosmarinic acid (1063.1-1149.3 mu g/g), coumarin (683.0-772.6 mu g/g), quercetin (881.0 mu g/g), and catechin (277.7-400.2 mu g/g) were identified in the antioxidant fractions. Moreover, the anticholinesterase activity was also performed using the in vitro spectroscopic Ellman method. The antioxidant fractions exhibited moderate butyrylcholinesterase inhibitory activity. The multi-ware analysis was performed to understand the origin of bioactivities. According to principal component analysis, it is detected that the hyperoside, catechin, taxifolin, and tannic acid were responsible for the antioxidant activity. Therefore, the cones of Abies numidica can be considered as potent antioxidant and anticholinesterase sources in food and pharmaceutical industries, commercially.
  • [ X ]
    Öğe
    Antioxidant, anticholinesterase activities and polyphenolic constituents of cones of algerian fir (Abies numidica) by LCESI- MS/MS with chemometric approach
    (2021) Duru, Mehmet Emin; Erol, Ebru; Ertaş, Abdulselam; Kabouche, Zahia; Mostefa, Maya Belhadj; Mokaddem-Darouı, Habiba; Kabouche, Ahmed
    The fractions (Fr.1-5) of the hydromethanolic extract of Abies numidica cones were studied for theirpolyphenol constituents, antioxidant, and anticholinesterase activities. The ?-carotene-linoleic acid, cupric reducingpower (CUPRAC), DPPH scavenging, and ABTS radical scavenging assays were used to determine antioxidant activity.Fr.3 exhibited the highest antioxidant activity in ABTS test (IC50: 1.29 ?g/mL), b-carotene-linoleic acid test (IC50: 18.6?g/mL) and CUPRAC (A0.5: 33.8 ?g/mL) assays. Three fractions (Fr.2-4) promising antioxidant activity were analyzedusing LC-MS/MS for their phenolic compositions. Taxifolin (155.9-2816.2 ?g analyte/g extract), hyperoside (353.0-2045.5 ?g/g), vanillin (1488.9-1529.9 ?g/g), tannic acid (1281.6-1416.8 ?g/g), rosmarinic acid (1063.1-1149.3 ?g/g),coumarin (683.0-772.6 ?g/g), quercetin (881.0 ?g/g), and catechin (277.7-400.2 ?g/g) were identified in the antioxidantfractions. Moreover, the anticholinesterase activity was also performed using the in vitro spectroscopic Ellman method.The antioxidant fractions exhibited moderate butyrylcholinesterase inhibitory activity. The multi-ware analysis wasperformed to understand the origin of bioactivities. According to principal component analysis, it is detected that thehyperoside, catechin, taxifolin, and tannic acid were responsible for the antioxidant activity. Therefore, the cones ofAbies numidica can be considered as potent antioxidant and anticholinesterase sources in food and pharmaceuticalindustries, commercially.
  • Küçük Resim
    Öğe
    Di-, and triterpenoids isolation and LC-MS analysis of salvia marashica extracts with bioactivity studies
    (ACG Publications, 2021) Aydın, Sibel Kıran; Ertaş, Abdulselam; Boğa, Mehmet; Erol, Ebru; Toraman, Gülbahar O. Alim; Saygı, Tuba Kusman; Halfon, Belkıs; Topçu, Gülaçtı
    Abstract: In this study, dichloromethane, acetone, and methanol extracts of the aerial parts of the Salvia marashica plant which is an endemic species to Anatolia, were investigated. The total phenolic amounts of these extracts were determined as pyrocatechol equivalent and total flavonoids as quercetin equivalent. Antioxidant activity was determined by four complementary methods including inhibition of lipid peroxidation (by βcarotene color expression), DPPH free radical scavenging activity, ABTS cation radical scavenging activity and CUPRAC methods. Anticholinesterase activity of the extracts was investigated by the Ellman method against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) enzymes. Viability and cytotoxic activity tests were carried out on the fibroblast L929 cells and cytotoxic A549 lung cancer cells, respectively. The triterpenoids and diterpenoids constitute the major secondary metabolites of the S. marashica acetone and methanol extracts isolated by chromatographic methods. Their structures were determined based on spectroscopic methods, namely NMR and mass analyses. Ten terpenoids were obtained from either acetone or methanol extracts of the S. marashica. Seven of them were triterpenoids, elucidated as lupeol, lupeol-3-acetate, lup-12, 20(29)-diene, lup-20(29)-ene, α-amyrin-tetracosanoate, oleanolic acid and ursolic acid besides a steroid β-sitosterol. Two abietane diterpenes, abieta-8,11,13-triene (1) and 18-acetoxymethylene-abieta-8,11,13-triene (2), were obtained from the acetone extract which were isolated from a Salvia species for the first time in the present study. The methanol extract was found to be very rich in rosmarinic acid determined by LC-MS/MS analysis.