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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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    Antioxidant, antidiabetic, antiglaucoma, and anticholinergic effects of Tayfi grape (Vitis vinifera): A phytochemical screening by LC-MS/MS analysis
    (De Gruyter Poland Sp Z O O, 2023) Karagecili, Hasan; Izol, Ebubekir; Kirecci, Ekrem; Gulcin, Ilhami
    Grapes (Vitis vinifera), grape extracts, and grape products are known to possess beneficial effects. Antioxidant activity and enzyme inhibition activities of Tayfi grape (Vitis vinifera) extracts were studied and compared to standards. The IC50 values of the ethanol extract of the Tayfi grape's scavenging abilities for ABTS(center dot+) and DPPH. radicals were found to be 5.9 and 16.1 mu g/mL, respectively, higher than those of positive controls. Also, the phenolic and flavonoid ingredients of the Tayfi grape seed ethanol extract were measured to be 82.8 mg GAE/g and 91 mg QE/g. The Tayfi grape seed water and ethanol extracts exhibited IC50 values of 5.3 and 5.8 mu g/mL toward a-glycosidase, respectively; 385.2 and 567.6 mu g/mL toward a-amylase; 27.1 and 13.8 mu g/mL toward acetylcholinesterase (AChE); and 54.7 and 12.6 mu g/mL toward CA II. Twenty-two biomolecules were detected by LC- MS/MS. The four types of conventional antibiotics utilized by hospitals proved ineffective against Staphylococcus aureus and Escherichia coli bacteria. The Tayfi grape ethanol and water extracts had high AChE, alpha-glycosidase, and CA II inhibitions in addition to having antioxidant activity. The use of Tayfi grape extracts for pharmacological purposes in individuals with the diseases mentioned above can be sustained by clinical pharmacology studies.
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    Comprehensive Metabolite Profiling of Berdav Propolis Using LC-MS/MS: Determination of Antioxidant, Anticholinergic, Antiglaucoma, and Antidiabetic Effects
    (Mdpi, 2023) Karagecili, Hasan; Yilmaz, Mustafa Abdullah; Erturk, Adem; Kiziltas, Hatice; Guven, Leyla; Alwasel, Saleh H.; Gulcin, Ilhami
    Propolis is a complex natural compound that honeybees obtain from plants and contributes to hive safety. It is rich in phenolic and flavonoid compounds, which contain antioxidant, antimicrobial, and anticancer properties. In this study, the chemical composition and antioxidant activities of propolis were investigated; ABTS(center dot+), DPPH center dot and DMPD center dot+ were prepared using radical scavenging antioxidant methods. The phenolic and flavonoid contents of propolis were 53 mg of gallic acid equivalent (GAE)/g and 170.164 mg of quercetin equivalent (QE)/g, respectively. The ferric ion (Fe3+) reduction, CUPRAC and FRAP reduction capacities were also studied. The antioxidant and reducing capacities of propolis were compared with those of butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), alpha-tocopherol and Trolox reference standards. The half maximal inhibition concentration (IC50) values of propolis for ABTS(center dot+), DPPH center dot and DMPD center dot+ scavenging activities were found to be 8.15, 20.55 and 86.64 mu g/mL, respectively. Propolis extract demonstrated IC50 values of 3.7, 3.4 and 19.6 mu g/mL against alpha-glycosidase, acetylcholinesterase (AChE) and carbonic anhydrase II (hCA II) enzyme, respectively. These enzymes' inhibition was associated with diabetes, Alzheimer's disease (AD) and glaucoma. The reducing power, antioxidant activity and enzyme inhibition capacity of propolis extract were comparable to those demonstrated by the standards. Twenty-eight phenolic compounds, including acacetin, caffeic acid, p-coumaric acid, naringenin, chrysin, quinic acid, quercetin, and ferulic acid, were determined by LC-MS/MS to be major organic compounds in propolis. The polyphenolic antioxidant-rich content of the ethanol extract of propolis appears to be a natural product that can be used in the treatment of diabetes, AD, glaucoma, epilepsy, and cancerous diseases.
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    Comprehensively Revealing the Profile of Pistacia vera L. cv. Siirt Turpentine - Antioxidant, Antidiabetic, Anti-Alzheimer, and Antiglaucoma Effects
    (Acg Publications, 2023) Karagecili, Hasan; Yilmaz, Mustafa Abdullah; Alwasel, Saleh H.; Arik, Mustafa; Gulcin, Ilhami
    Pistacia species containing turpentine which has protective effects and used as a medicine against diabetes, and infections for a long time. To interpret the antioxidant capacities of turpentine from Pistacia vera L. cv. Siirt, 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid radical (ABTS(center dot+)) and 1,1-diphenyl-2-picrylhydrazyl free radical (DPPH center dot), Fe3+- 2,4,6-tris(2-pyridyl)-S-triazine (TPTZ) and Cu2+ reducing ability were studied and compared to reference antioxidants of BHT, BHA, alpha-Tocopherol, and Trolox. The IC50 of turpentine for ABTS(center dot+) and DPPH center dot scavenging capacities were determined to be lower than reference antioxidant standards as 231.1 mu g/mL and 346.6 mu g/mL, consequently. The total flavonoid and phenolic contents in turpentine were measured as 12.5 mg GAE/g and 38.852 mg QE/g, respectively. For determination of antidiabetic, anti-Alzheimer, and antiglaucoma effects of turpentine, acetylcholinesterase (AChE), alpha-glycosidase and carbonic anhydrase II (hCA II) enzymes inhibition abilities of turpentine were performed. The IC50 values of turpentine extract against alpha-glycosidase, hCA II, and AChE enzymes were found as 2.04, 3.59 and 14.6 mu g/mL, respectively. The quantity of protocatechuic acid and naringenin were determined using LC-MS/MS against 53 standards. The results clearly demonstrated polyphenolics in P. vera L. cv. Siirt turpentine is a natural product has potential usage in amelioration of glaucoma, AD, diabetes, and epilepsy.
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    Determination of Antioxidant, Anti-Alzheimer, Antidiabetic, Antiglaucoma and Antimicrobial Effects of Zivzik Pomegranate (Punica granatum)-A Chemical Profiling by LC-MS/MS
    (Mdpi, 2023) Karagecili, Hasan; Izol, Ebubekir; Kirecci, Ekrem; Gulcin, Ilhami
    Zivzik pomegranate (Punica granatum) has recently sparked considerable interest due to its nutritional and antioxidant properties. To evaluate the antioxidant capacities of P. granatum juice, ethanol (EEZP), and water (WEZP) extracts from peel and seed, the antioxidant methods of 2,20-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid radical (ABTS(center dot)+) scavenging, 1,1-diphenyl-2picrylhydrazyl free radical (DPPH center dot) scavenging, Fe3+-2,4,6-tris(2-pyridyl)-S-triazine (TPTZ) reducing, Fe3+ reducing, and Cu2+ reducing methods were used. The antioxidant capacities of samples were compared with the most commonly used synthetic antioxidants, i.e., BHA, BHT, ff-tocopherol, and Trolox. In terms of setting an example, the IC50 values of EEZP for ABTS(center dot)+ and DPPH center dot scavenging activities were found to be lower than standards, at 5.9 and 16.1 mu g/mL, respectively. The phenolic and flavonoid contents in EEZP peel were 59.7 mg GAE/g and 88.0 mg QE/g, respectively. Inhibition of ff-glycosidase, ff-amylase, acetylcholinesterase, and human carbonic anhydrase II (hCA II) enzymes was also investigated. EEZP demonstrated IC50 values of 7.3 mu g/mL against ff-glycosidase, 317.7 mu g/mL against ff-amylase, 19.7 mu g/mL against acetylcholinesterase (AChE), and 106.3 mu g/mL against CA II enzymes. A total of 53 phenolic compounds were scanned, and 30 compounds were determined using LC-MS/MS. E. coli and S. aureus bacteria were resistant to all four antibiotics used as standards in hospitals.
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    Evaluation of Carbonic Anhydrase, Acetylcholinesterase, Butyrylcholinesterase, and ?-Glycosidase Inhibition Effects and Antioxidant Activity of Baicalin Hydrate
    (Mdpi, 2023) Durmaz, Lokman; Karagecili, Hasan; Gulcin, Ilhami
    Baicalin is the foremost prevalent flavonoid found in Scutellaria baicalensis. It also frequently occurs in many multi-herbal preparations utilized in Eastern countries. The current research has assessed and compared the antioxidant, antidiabetic, anticholinergic, and antiglaucoma properties of baicalin hydrate. Baicalin hydrate was tested for its antioxidant capacity using a variety of techniques, including N,N-dimethyl-p-phenylenediamine dihydrochloride radical (DMPD center dot+) scavenging activity, 2,2 '-azinobis-(3-ethylbenzothiazoline-6-sulphonate) radical (ABTS(center dot+)) scavenging activity, 1,1-diphenyl-2-picrylhydrazyl radical (DPPH center dot) scavenging activity, potassium ferric cyanide reduction ability, and cupric ions (Cu2+) reducing activities. Also, for comparative purposes, reference antioxidants, such as butylated hydroxyanisole (BHA), Trolox, alpha-Tocopherol, and butylated hydroxytoluene (BHT) were employed. Baicalin hydrate had an IC50 value of 13.40 mu g/mL (r(2): 0.9940) for DPPH radical scavenging, whereas BHA, BHT, Trolox, and alpha-Tocopherol had IC50 values of 10.10, 25.95, 7.059, and 11.31 mu g/mL for DPPH center dot scavenging, respectively. These findings showed that baicalin hydrate had comparably close and similar DPPH center dot scavenging capability to BHA, alpha-tocopherol, and Trolox, but it performed better than BHT. Additionally, apart from these studies, baicalin hydrate was tested for its ability to inhibit a number of metabolic enzymes, including acetylcholinesterase (AChE), butyrylcholinesterase (BChE), carbonic anhydrase II (CA II), and alpha-glycosidase, which have been linked to several serious illnesses, such as Alzheimer's disease (AD), glaucoma, and diabetes, where the K-i values of baicalin hydrate toward the aforementioned enzymes were 10.01 +/- 2.86, 3.50 +/- 0.68, 19.25 +/- 1.79, and 26.98 +/- 9.91 nM, respectively.
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    Hamamelitannin's Antioxidant Effect and Its Inhibition Capability on ?-Glycosidase, Carbonic Anhydrase, Acetylcholinesterase, and Butyrylcholinesterase Enzymes
    (Mdpi, 2024) Durmaz, Lokman; Karagecili, Hasan; Erturk, Adem; Ozden, Eda Mehtap; Taslimi, Parham; Alwasel, Saleh; Gulcin, Ilhami
    Hamamelitannin (2 ',5-di-O-galloyl-hamamelose) bears two-gallate moieties in its structure, and is a natural phenolic product in the leaves and the bark of Hamamelis virginiana. The antioxidant capacity of hamamelitannin was evaluated by a range of methods, with the following findings: the ability to reduce potassium ferric cyanide; the scavenging of N,N-dimethyl-p-phenylenediamine dihydrochloride radical (DMPD center dot+); the scavenging of 2,2 '-azinobis-(3-ethylbenzothiazoline-6-sulphonate) radical (ABTS center dot+); the scavenging of 1,1-diphenyl-2-picrylhydrazyl radical (DPPH center dot); and the ability to reduce cupric ions (Cu2+). Additionally, reference antioxidants of alpha-Tocopherol, butylated hydroxyanisole (BHA), Trolox, and butylated hydroxytoluene (BHT) were used for comparison. For DPPH radical scavenging, hamamelitannin had an IC50 value of 19.31 mu g/mL, while the IC50 values for BHA, BHT, Trolox, and alpha-Tocopherol were 10.10, 25.95, 7.05, and 11.31 mu g/mL, respectively. The study found that hamamelitannin functioned similarly to BHA, alpha-tocopherol, and Trolox in terms of DPPH center dot scavenging, but better than BHT. Additionally, as a polyphenolic secondary metabolite, the hamamelitannin inhibition capability of several metabolic enzymes was demonstrated, including acetylcholinesterase (AChE), butyrylcholinesterase (BChE), carbonic anhydrase I (CA I), carbonic anhydrase II (CA II) and alpha-glycosidase. The Ki values of hamamelitannin exhibited 7.40, 1.99, 10.18, 18.26, and 25.79 nM toward AChE, BChE, hCA I, hCA II, and alpha-glycosidase, respectively.
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    Protective effect of Naringin on experimental hindlimb ischemia/reperfusion injury in rats
    (Taylor & Francis Ltd, 2016) Gursul, Cebrail; Akdemir, Fazile Nur Ekinci; Akkoyun, Turan; Can, Ismail; Gul, Mustafa; Gulcin, Ilhami
    This study was designed to investigate the antioxidant effects of Naringin, in ischemia/reperfusion (I/R)-induced skeletal muscle injury in rats. The rats were randomly allocated into three groups including control, I/R and I/R + Naringin groups. Muscle tissues of I/R groups revealed significantly higher antioxidant enzyme activities, and increased levels of malondialdehyde, as specific a marker of the lipid peroxidation and tissue damage, compared to the control group (p<0.05). Levels of these parameters in muscle revealed significant reductions in the I/R + Naringin group compared to the I/R group (p<0.05). Histopathological examination of ischemia muscles in the I/R group showed significant degeneration and inflammation compared to the control group, whereas ischemic muscles of Naringin-administered group showed significant reduction in degeneration and inflammation compared to the I/R group (p<0.05). We suggest that the protective effect of Naringin may reduce the I/R injury in cases of extremity injuries with acute vascular complications, extremity surgery with prolonged tourniquet application.