Browsing by Author "Durmaz, Lokman"

Now showing 1 - 4 of 4

Antidiabetic, Anticholinergic and Antioxidant Activities of Aerial Parts of Shaggy Bindweed (Convulvulus Betonicifolia Miller Subsp.) - Profiling of Phenolic Compounds by Lc-Hrms
(Elsevier Sci Ltd, 2021) Bingol, Zeynebe; Kiziltas, Hatice; Goren, Ahmet C.; Kose, Leyla Polat; Topal, Meryem; Durmaz, Lokman; Gulcin, Ilhami
In order to evaluate the antioxidant activity of evaporated ethanolic extract (EESB) and lyophilized water extract (WESB) of Shaggy bindweed (Convulvulus betonicifolia Mill. Subs), some putative antioxidant methods such as DPPH. scavenging activity, ABTS(center dot)(-) scavenging effect, ferric ions (Fe3+) reduction method, cupric ions (Cu2+) reducing capacity, and ferrous ions (Fe2+) binding activities were separately performed. Also, ascorbic acid, alpha-tocopherol and BHT were used as the standard compounds. Additionally, some phenolic compounds that responsible for antioxidant abilities of EESB and WESB were screened by liquid chromatography-high resolution mass spectrometry (LC-HRMS). At the same concentration, EESB and WESB demonstrated effective antioxidant abilities when compared to standards. In addition, EESB demonstrated IC50 values of 1.946 mu g/mL against acetylcholinesterase (AChE), 0.815 mu g/mL against alpha-glycosidase and 0.675 mu g/mL against alpha-amylase enzymes.
Antioxidant, Antidiabetic, Anticholinergic, and Antiglaucoma Effects of Magnofluorine
(Mdpi, 2022) Durmaz, Lokman; Kiziltas, Hatice; Guven, Leyla; Karagecili, Hasan; Alwasel, Saleh; Gulcin, Ilhami
Magnofluorine, a secondary metabolite commonly found in various plants, has pharmacological potential; however, its antioxidant and enzyme inhibition effects have not been investigated. We investigated the antioxidant potential of Magnofluorine using bioanalytical assays with 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS(center dot+)), N,N-dimethyl-p-phenylenediamine dihydrochloride (DMPD center dot+), and 1,1-diphenyl-2-picrylhydrazyl (DPPH center dot) scavenging abilities and K-3[Fe(CN)(6)] and Cu2+ reduction abilities. Further, we compared the effects of Magnofluorine and butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), alpha-Tocopherol, and Trolox as positive antioxidant controls. According to the analysis results, Magnofluorine removed 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals with an IC50 value of 10.58 mu g/mL. The IC50 values of BHA, BHT, Trolox, and alpha-Tocopherol were 10.10 mu g/mL, 25.95 mu g/mL, 7.059 mu g/mL, and 11.31 mu g/mL, respectively. Our results indicated that the DPPH center dot scavenging effect of Magnofluorine was similar to that of BHA, close to that of Trolox, and better than that of BHT and alpha-tocopherol. The inhibition effect of Magnofluorine was examined against enzymes, such as acetylcholinesterase (AChE), alpha-glycosidase, butyrylcholinesterase (BChE), and human carbonic anhydrase II (hCA II), which are linked to global disorders, such as diabetes, Alzheimer's disease (AD), and glaucoma. Magnofluorine inhibited these metabolic enzymes with Ki values of 10.251.94, 5.991.79, 25.411.10, and 30.563.36 nM, respectively. Thus, Magnofluorine, which has been proven to be an antioxidant, antidiabetic, and anticholinergic in our study, can treat glaucoma. In addition, molecular docking was performed to understand the interactions between Magnofluorine and target enzymes BChE (D: 6T9P), hCA II (A:3HS4), AChE (B:4EY7), and alpha-glycosidase (C:5NN8). The results suggest that Magnofluorine may be an important compound in the transition from natural sources to industrial applications, especially new drugs.
Lc-Hrms Profiling and Antidiabetic, Anticholinergic, and Antioxidant Activities of Aerial Parts of Kinkor (Ferulago Stellata)
(Mdpi, 2021) Kiziltas, Hatice; Bingol, Zeynebe; Goren, Ahmet Ceyhan; Kose, Leyla Polat; Durmaz, Lokman; Topal, Fevzi; Gulcin, Ilhami
Kinkor (Ferulago stellata) is Turkish medicinal plant species and used in folk medicine against some diseases. As far as we know, the data are not available on the biological activities and chemical composition of this medicinal plant. In this study, the phytochemical composition; some metabolic enzyme inhibition; and antidiabetic, anticholinergic, and antioxidant activities of this plant were assessed. In order to evaluate the antioxidant activity of evaporated ethanolic extract (EEFS) and lyophilized water extract (WEFS) of kinkor (Ferulago stellata), some putative antioxidant methods such as DPPHGreek ano teleia scavenging activity, ABTS(center dot+) scavenging activity, ferric ions (Fe3+) reduction method, cupric ions (Cu2+) reducing capacity, and ferrous ions (Fe2+)-binding activities were separately performed. Furthermore, ascorbic acid, BHT, and alpha-tocopherol were used as the standard compounds. Additionally, the main phenolic compounds that are responsible for antioxidant abilities of ethanol and water extracts of kinkor (Ferulago stellata) were determined by liquid chromatography-high-resolution mass spectrometry (LC-HRMS). Ethanol and water extracts of kinkor (Ferulago stellata) demonstrated effective antioxidant abilities when compared to standards. Moreover, ethanol extract of kinkor (Ferulago stellata) demonstrated IC50 values of 1.772 mu g/mL against acetylcholinesterase (AChE), 33.56 +/- 2.96 mu g/mL against alpha-glycosidase, and 0.639 mu g/mL against alpha-amylase enzyme respectively.
Potential Antioxidant, Anticholinergic, Antidiabetic and Antiglaucoma Activities and Molecular Docking of Spiraeoside as a Secondary Metabolite of Onion (Allium Cepa)
(Elsevier, 2023) Durmaz, Lokman; Kiziltas, Hatice; Karagecili, Hasan; Alwasel, Saleh; Gulcin, Lhami
Onion contains many dietary and bioactive components including phenolics and flavonoids. Spiraeoside (quercetin-4-O-b-D-glucoside) is one of the most putative flavonoids in onion. Several antioxidant techniques were used in this investigation to assess the antioxidant capabilities of spiraeoside, including 1,1diphenyl-2-picrylhydrazyl radical (DPPHGreek ano teleia) scavenging, N,N-dimethyl-p-phenylenediamine radical (DMPD'') scavenging, 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulphonate) radical (ABTS'') scavenging activities, cupric ions (Cu2') reducing and potassium ferric cyanide reduction abilities. In contrast, the water-soluble a-tocopherol analogue trolox and the conventional antioxidants butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), and a-tocopherol were utilized as the standards for evaluation. Spiraeoside scavenged the DPPH radicals an IC50 of 28.51 mu g/mL (r2: 0.9705) meanwhile BHA, BHT, trolox, and a-tocopherol displayed IC50 of 10.10 mu g/mL (r2: 0.9015), 25.95 mu g/mL (r2: 0.9221), 7.059 mu g/mL (r2: 0.9614) and 11.31 mu g/mL (r2: 0.9642), accordingly. The results exhibited that spiraeoside had effects similar to BHT, but less potent than a-tocopherol, trolox and BHA. Also, inhibitory effects of spiraeoside were evaluated toward some metabolic enzymes including acetylcholinesterase (AChE), butyrylcholinesterase (BChE), carbonic anhydrase II (CA II) and a-glycosidase, which are related to a number of illnesses, such as Alzheimer's disease (AD), diabetes mellitus and glaucoma disorder. Spiraeoside exhibited IC50 values of 4.44 nM (r2: 0.9610), 7.88 nM (r2: 0.9784), 19.42 nM (r2: 0.9673) and 29.17 mM (r2: 0.9209), respectively against these enzymes. Enzyme inhibition abilities were compared to clinical used inhibitors including acetazolamide (for CA II), tacrine (for AChE and BChE) and acarbose (for a-glycosidase). Spiraeoside demonstrated effective antioxidant, anticholinergic, antidiabetic and antiglaucoma activities. With these properties, it has shown that Spiraeoside has the potential to be a medicine for some metabolic diseases. (c) 2023 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).