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Öğe Biological Activity of Extracts of Traditional Wild Medicinal Plants from the Balkan Peninsula(ELSEVIER, 2019) Vujanovic, Milena; Zengin, Gökhan; Durovic, Saša; Maskovic, Pavle; Cvetanovic, Aleksandra; Radojkovic, MarijaThe aim of the present study was to investigate antioxidant, cytotoxic and enzyme-inhibitory activities of wild growing medicinal herbs in the Balkan Peninsula (Morus nigra L., Symphytum officinale L., Sambucus nigra L., Teucrium chamaedrys L. and Teucrium montanum L.). Notably, antioxidant activity of investigated plant species was confirmed through several assays including free radical scavenging (ABTS), reducing power (CUPRAC), phosphomolybdenum and metal chelating test. Cytotoxic activity was evaluated using three different cell lines: Hep2c, RD and L2OB. S. officinale L. and S. nigra L. showed the highest cytotoxic activity. All studied extracts exhibited remarkable inhibitory effects on tested enzymes. S. nigra L. and T. chamaedrys L. exhibited the strongest tyrosinase inhibitory effects (26.62 +/- 0.77 extract and 14.72 +/- 0.41 mgKAEs/g, respectively), while S. officinale L. was the most potent in terms on a-glucosidase inhibition (11.47 +/- 0.05 mmol ACAE/g extract). The obtained results indicate that the extracts of the tested wild grown plants could be used which can be explored as natural medicines for the promotion of health. (c) 2018 SAAB. Published by Elsevier B.V. All rights reserved.Öğe Chemical and biological insights on aronia stems extracts obtained by different extraction techniques: From wastes to functional products(ELSEVIER SCIENCE BV, 2017) Cvetanovic, Aleksandra; Svarc-Gajic, Jaroslava; Zekovic, Zoran; Maskovic, Pavle; Durovic, Sasa; Zengin, Gökhan; Delerue-Matos, CristinaThe present study aimed to evaluate chemical and biological potential of aronia stems for providing new raw material for food and pharmaceutical industries. Aqueous extracts of aronia stems were prepared by three different techniques (microwave-assisted, ultrasound-assisted and subcritical water extraction). For biological activities, antioxidant, antimicrobial and cytotoxic activities were evaluated. For chemical characterisation, phenolic compounds and essential elements were analysed as well as total phenolic contents. Subcritical water extracts exhibited the strongest antioxidant activity with the highest content of phenolics. Minimum inhibitory concentrations for analysed extracts were in the range from 9.76 to 156.25 mu g/mL in antimicrobial assays. The extracts exerted prominent cytotoxicity against different cell lines. Rutin was detected as the major compound in the studied extracts and these extracts were also rich in essential elements. Our study suggested that subcritical water extract of aronia stem could be considered as a new raw material in developing novel functional/industrial products.Öğe Identification of phenolic profiles, fatty acid compositions, antioxidant activities, and enzyme inhibition effects of seven wheat cultivars grown in Turkey: A phytochemical approach for their nutritional value(TAYLOR & FRANCIS INC, 2017) Zengin, Gökhan; Nithiyanantham, Srinivasan; Sarıkürkcü, Cengiz; Uysal, Şengül; Ceylan, Ramazan; Ramya, Karnam Satya; Maskovic, PavleIn the present article, seven wheat cultivars (Ahmetaga, Bezostaya, Dagdas-94, Ekiz, Karahan-99, Konya-2002, and Tosunbey) grown in Turkey were compared for their phytochemical composition, antioxidant, and enzyme inhibitory activities. Antioxidant capacities and enzyme inhibitory effects were investigated with colorimetric methods. Total phenolic content ranged from 40.71 to 86.34 mg of gallic acid equivalent/100 g wheat grain. Tosunbey (92 mg Trolox equivalent/100 g wheat grain) and Ahmetaga (114.56 mg Trolox equivalent/100 g wheat grain) cultivars exhibited strong 2,2 azino-bis (3-ethylbenzothiazloine-6-sulfonic acid) and 1,1-diphenyl-2-picrylhydrazyl free radical scavenging activities. As compared to other wheat cultivars, Tosunbey cultivar had remarkable both antioxidant and enzyme inhibitory effects with the highest level of phenolics. Ferulic acid, chlorogenic acid, and apigenin were the major phenolics in extracts tested. This study suggested that an increased intake of wheat derived products could represent an effective strategy for the management of oxidative stress related chronic and degenerative diseases such as Alzheimers and diabetes mellitus.Öğe Multidirectional Approaches on Autofermented Chamomile Ligulate Flowers: Antioxidant, Antimicrobial, Cytotoxic and Enzyme Inhibitory Effects(ELSEVIER, 2019) Cvetanovic, Aleksandra; Zekovic, Zoran; Zengin, Gökhan; Maskovic, Pavle; Petronijevic, Mirjana; Radojkovic, MarijaIn the frame of the present paper the enzymatic transformation of apigenin-glucosides into free aglycone was achieved by autofermentation of chamomile ligulate flowers (CLF). Antioxidant properties of the autofermented CLF (A-CLF) extract were evaluated by their radical scavenging activity against hydroxyl radicals and inhibition of lipid peroxidation. Obtained results showed that A-CLF extract in a concentration of 0.84 mg/mL was able to inhibit 50% of hydroxyl radicals, while IC50 value in the case of inhibition of lipid peroxidation was 5.21 mg/mL. Antimicrobial activity was done by measuring minimal inhibitory concentration (MIC) values for eight microbial strains. Obtained MIC values (9.75-156.25 mu g/mL) confirmed high antibacterial and antifungal activities of the extract. Cytotoxic activity was done by using three histological different cell lines: Hep2C; RD and L2OB. Obtained IC50 values for these cell lines were: 28.72; 17.31 and 10.92, respectively. Furthermore, in vitro investigation of the A-CLF ability to inhibit selected enzymes (alpha-amylase, alpha-glucosidase, tyrosinase) was done as well. Determined activities against alpha-amylase and alpha-glucosidase were 0.94 and 3.24 mmol ACAE/g, respectively. Further, measured activity against tyrosinase was 0.69 mg KAEs/g indicating high enzyme-inhibitory activity of examined sample. Results demonstrated that A-CLF extracts showed considerable pharmacological activity. (c) 2018 SAAB. Published by Elsevier B.V. All rights reserved.
