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Browsing by Author "Alwasel, Saleh"

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    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.
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    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/).