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Yenigun S, Ipek Y, Marah S, Demirtas I, Ozen T. DNA protection, molecular docking, antioxidant, antibacterial, enzyme inhibition, and enzyme kinetic studies for parietin, isolated from Xanthoria parietina (L.) Th. Fr. J Biomol Struct Dyn 2024; 42:848-862. [PMID: 37021462 DOI: 10.1080/07391102.2023.2196693] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/22/2023] [Indexed: 04/07/2023]
Abstract
Parietin was isolated from Xanthoria parietina (L.) Th. Fr.' (methanol:chloroform) extract, using a silica column. 13 C NMR and 1H NMR were used to confirm the structure of the isolated parietin. For the first time, parietin was investigated for its antioxidant, antibacterial and DNA protective activities. Molecular docking was carried out to determine the binding affinity and interactions between the enzymes and our molecule. Inhibition and kinetic mechanism studies for the action of the enzymes were performed too. Parietin exhibited high metal chelating activity. The MIC values of parietin were sufficient to inhibit different bacterial strains; E. coli, P. aeruginosa, K. pneumoniae and S. aureus. Molecular docking applications exhibited that acetylcholinesterase (AChE), butyrylcholinesterase (BChE), lipase, and tyrosinase have high potential for binding with the parietin. Especially, the parietin's highest binding affinity was recorded with AChE and tyrosinase. These results were confirmed by the inhibition and kinetics results, where, parietin observed a potent inhibition with an IC50 values between 0.013-0.003 µM. Moreover, parietin acts' as a non-competitive inhibitor against AChE, BChE, and lipase, and as a competitive inhibitor against tyrosinase with a high rate of inhibition stability. The promising biological properties of parietin revealed its effectiveness in terms of suitability in the food and pharmaceutical industries.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Semiha Yenigun
- Department of Chemistry, Faculty of Science, Ondokuz Mayis University, Samsun, Turkey
| | - Yasar Ipek
- Department of Biochemistry, Faculty of Science and Art, Cankiri Karatekin University, Cankiri, Turkey
| | - Sarmad Marah
- Department of Chemistry, Faculty of Science, Ondokuz Mayis University, Samsun, Turkey
| | - Ibrahim Demirtas
- Department of Biochemistry, Faculty of Science and Art, Igdir University, Igdir, Turkey
| | - Tevfik Ozen
- Department of Chemistry, Faculty of Science, Ondokuz Mayis University, Samsun, Turkey
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Tüfekçi AR, Demirtaş İ, Akşit H, Arslan Ş, Kocabıyık K, Zeybek S, Ozen T, Köksal E. Two new compounds from endemic Centaurea paphlagonica (Bornm.) Wagenitz and their cytotoxic activities. Chem Biol Drug Des 2024; 103:e14409. [PMID: 38030403 DOI: 10.1111/cbdd.14409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/04/2023] [Accepted: 11/16/2023] [Indexed: 12/01/2023]
Abstract
Centaurea paphlagonica (Bornm.) Wagenitz is an endemic plant in Turkey. Pyrocatechol, vanillic acid, 3,4-dihydroxy benzoic acid, 5-O-caffeoylshikimic acid, tamarixetin, chlorogenic acid methyl ester, quercetin, 1,3-dicaffeoylquinic acid, tamarixetin-7-O-β-D-glucopyranoside, quercimetrin, daucosterin, paphlagonicanin B, tamarixetin-7-O-β-rutinoside, rutin, chlorogenic acid, isoorientin, orientin, 3-O-feruloylquinic acid, quercetagetin-3-methyl ether 6-O-β-glucopyranoside, diosmetin 6-C-β-glucopyranoside, quercetagetin 4'-methyl ether 7-O-β-glucopyranoside, paphlagonicanin A, nepetin, cirsiliol, desacylcynaropicrin, and 8α-O-(2',3'-dihydroxyisobutyryl) desacylcynaropicrin were isolated from both flower and aerial parts of C. paphlagonica. These compounds were identified using 1D and 2D NMR methods and ESI-MS. The MTT assay assessed the antiproliferative activities of all isolated (known and new compounds) compounds on Caco-2, LNCaP, A549, HeLa, and HEK-293 cell lines. The 8α-O-(2',3'-dihydroxyisobutyryl) desacylcynaropicrin demonstrated the highest activity against CaCo-2 and HeLa cancer cell lines.
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Affiliation(s)
- Ali Rıza Tüfekçi
- Department of Chemistry, Faculty of Natural Sciences, Çankırı Karatekin University, Çankırı, Turkey
| | - İbrahim Demirtaş
- Department of Biochemistry, Faculty of Arts and Sciences, Iğdır University, Iğdır, Turkey
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ondokuz Mayıs University, Samsun, Turkey
| | - Hüseyin Akşit
- Department of Analytical Chemistry, Faculty of Pharmacy, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Şevki Arslan
- Department of Biology, Faculty of Arts and Sciences, Pamukkale University, Denizli, Turkey
| | - Kübra Kocabıyık
- Department of Biology, Faculty of Arts and Sciences, Pamukkale University, Denizli, Turkey
| | - Sibel Zeybek
- Department of Biology, Faculty of Arts and Sciences, Pamukkale University, Denizli, Turkey
| | - Tevfik Ozen
- Department of Chemistry, Faculty of Science, Ondokuz Mayıs University, Samsun, Turkey
| | - Ekrem Köksal
- Department of Chemistry, Faculty of Science and Arts, Erzincan Binali Yıldırım University, Erzincan, Turkey
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Yakan H, Ozturk S, Uyar Tolgay E, Yenigun S, Marah S, Doruk T, Ozen T, Kutuk H. Kinetic Studies, Antioxidant Activities, Enzyme Inhibition Properties and Molecular Docking of 1,3-Dihydro-1,3-Dioxoisoindole Derivatives. Acta Chim Slov 2023; 70:29-43. [PMID: 37005614 DOI: 10.17344/acsi.2022.7808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/12/2022] [Accepted: 12/07/2022] [Indexed: 03/13/2023] Open
Abstract
The acid catalyzed hydrolysis of the N-(p-substitutedphenyl) phthalimides in three different acids was investigated at 50.0 ± 0.1 °C. Two different antioxidant activity tests as DPPH• and ABTS•+ scavenging activities, and three various enzyme inhibition activity tests as urease, acetylcholinesterase (AChE), and butyrylcholinesterase (BChE) inhibition activities, were applied. Compound 3c (2.03 μg/mL ) has higher antioxidant activity than other compounds and standards according to DPPH test. In AChE assay, compounds 3a and 3b (13.13 and 9.59 μg/mL) has higher enzyme inhibition activity than the standard Galantamine (14.37 μg/mL). In BChE and urease tests, all compounds (6.84-13.60 and 10.49-17.73 μg/mL) have higher enzyme inhibition activity than the standard Galantamine (49.40 μg/mL) and thiourea (26.19 μg/mL), respectively. The molecule interaction for each of the three compounds with the active sites of AChE, BChE, and urease enzymes was examined via molecular docking simulations.
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Yakan H, Omer HHS, Buruk O, Çakmak Ş, Marah S, Veyisoğlu A, Muğlu H, Ozen T, Kütük H. Synthesis, structure elucidation, biological activity, enzyme inhibition and molecular docking studies of new Schiff bases based on 5-nitroisatin-thiocarbohydrazone. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Ozen T, Kizil D, Yenigun S, Cesur H, Turkekul I. Evaluation of Bioactivities, Phenolic and Metal Content of Ten Wild Edible Mushrooms from Western Black Sea Region of Turkey. Int J Med Mushrooms 2020; 21:979-994. [PMID: 32450035 DOI: 10.1615/intjmedmushrooms.2019031927] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, we investigated the phenolic profile, metal concentrations, and antioxidant and antimicrobial activities of edible mushrooms collected from Sinop, Turkey: Amanita caesarea, Boletus edulis, Grifola frondosa, Hydnum repandum, Lactarius deliciosus, L. piperatus, L. volemus, Laetiporus sulphureus, Pleurotus ostreatus, and Ramaria flava. The mycochemical contents of R. flava, L. sulphureus, A. caesarea, L. deliciosus, and B. edulis were high. The cobalt (Co), cadmium (Cd), nickel (Ni), and lead (Pb) contents of mushrooms were between < 0.54 and 8.97 ppm. L. deliciosus had effective total antioxidant activity (7990 μmol α-tocopherol eq./g), ABTS·+ (2,2'-azino-bis-(3-ethylbenzthiazoline-6-sulphonic acid)) scavenging activity scavenging activity (EC50:7.87 μg/mL), and free-radical scavenging activity (EC50: 0.018 μg/mL) due to high levels of phenol, flavonoid, β-carotene, and lycopene. B. edulis demonstrated strong reducing power (A0.5: 11.89 μg/mL), inhibition of linoleic acid peroxidation (EC50:0.0016 μg/mL), and H2O2 scavenging activity (EC50: 0.28 μg/mL). A. caesarea and R. flava showed the best metal chelating activity (EC50:44.31 μg/mL) and superoxide anion scavenging activity (EC50:0.18 μg/mL), respectively. Inhibition zone values of A. caesarea extract were detected between 8.1 and 27.1 mm for B. cereus. Our results show that mushrooms are promising dietary sources for natural prevention of many infectious diseases and that they act as antioxidant agents.
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Affiliation(s)
- Tevfik Ozen
- Department of Chemistry, Faculty of Art and Sciences, Ondokuz Mayis University, 55139-Samsun, Turkey
| | - Demet Kizil
- Department of Chemistry, Faculty of Art and Sciences, Ondokuz Mayis University, 55139-Samsun, Turkey
| | - Semiha Yenigun
- Department of Chemistry, Faculty of Art and Sciences, Ondokuz Mayis University, 55139-Samsun, Turkey
| | - Hasan Cesur
- Department of Chemistry, Faculty of Art and Sciences, Ondokuz Mayis University, 55139-Samsun, Turkey
| | - Ibrahim Turkekul
- Department of Biology, Faculty of Art and Sciences, Gaziosmanpasa University, 60150-Tokat, Turkey
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Ozen T, Bora N, Yenigun S, Korkmaz H. An investigation of chemical content, enzyme inhibitory propert, antioxidant and antibacterial activity of
Aristolochia bodamae
Dingler (develiotu) (Aristolochiaceae) root extracts from Samsun, Turkey. FLAVOUR FRAG J 2020. [DOI: 10.1002/ffj.3559] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tevfik Ozen
- Faculty of Science and Letters Department of Chemistry Ondokuz Mayis University Samsun Turkey
| | - Neslihan Bora
- Faculty of Science and Letters Department of Chemistry Ondokuz Mayis University Samsun Turkey
| | - Semiha Yenigun
- Faculty of Science and Letters Department of Chemistry Ondokuz Mayis University Samsun Turkey
| | - Hasan Korkmaz
- Faculty of Science and Letters Department of Biology Ondokuz Mayis University Samsun Turkey
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Yakan H, Cakmak S, Kutuk H, Yenigun S, Ozen T. Synthesis, characterization, antioxidant, and antibacterial activities of new 2,3-dimethoxy and 3-acetoxy-2-methyl benzamides. Res Chem Intermed 2020. [DOI: 10.1007/s11164-020-04118-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bekhouche K, Ozen T, Boussaha S, Demirtas I, Kout M, Yildirim K, Zama D, Benayache F, Benayache S. Hepatoprotective effects of the n-butanol extract from Perralderia coronopifolia Coss. against PCP-induced toxicity in Wistar albino rats. Environ Sci Pollut Res Int 2019; 26:31215-31224. [PMID: 31463753 DOI: 10.1007/s11356-019-06231-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
In the present study, in vivo antioxidant properties of the n-butanol extract obtained from aerial parts of Perralderia coronopifolia were investigated in term of its hepatoprotective effect of female Wistar albino rats (n, 36; average age, 48 ± 5 days; weighing 150 ± 18 g) against PCP (pentachlorphenol)-induced toxicity. PCP (20 mg/kg b.w.) and plant extract (50 mg/kg b.w.) were administered daily by gavages for 2 weeks. Vitamin E (100 mg/kg b.w.) was given intraperitoneally as a positive control. Lipid peroxidation (LPO) levels, reduced glutathione (GSH) levels, and glutathione peroxidase (GPx) activities were evaluated in liver homogenates. While, aspartate aminotransferase (AST), alanine aminotransferase (ALT), cholesterol, and triglyceride parameters were analyzed in serums. The liver fragments were observed using light microscopy. Experimental results exhibited that PCP-treated group has a significant increase in the liver lipid peroxidation (LPO) levels of animals while decreased in plant extract-treated group. In addition, PCP caused significant decreases in glutathione peroxidase (GPx) activities and reduced glutathione (GSH) levels. Moreover, PCP induced hepatotoxicity by increasing serum transaminase enzymes, cholesterol, and triglyceride levels. While, these levels were restored to control value in animals treated with plant extract. The regularized levels of LPO, GSH, cholesterol, triglyceride, transaminase enzymes, and GPx activities revealed the antioxidant properties of the extract plant as well as of the vitamin E. The histological study showed the hepatoprotective effect of our extracts against PCP-induced acute intoxication, protecting the hepatic architecture and decreasing the functional and structural alterations of the liver. The plant extract had high antioxidant potential and completely prevented the toxic effect of PCP on the above of liver and serum parameters.
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Affiliation(s)
- Khadidja Bekhouche
- Department of Animal Biology, Faculty of Nature and Life Sciences, University Frères Mentouri 1, Constantine, Algeria
| | - Tevfik Ozen
- Department of Chemistry, Faculty of Science and Letters, Ondokuz Mayis University, Samsun, Turkey.
| | - Sara Boussaha
- Research Unit: Valuation of Natural Resources, Bioactive Molecules, Physicochemical and Biological Analyzes (VARENBIOMOL), University Frères Mentouri 1, Constantine, Algeria
| | - Ibrahim Demirtas
- Plant Research Laboratory, Department of Chemistry, University of Cankiri, Karatekin, Turkey
| | - Mounir Kout
- Anatomic and Pathologic Cytology Laboratory, University Hospital Center, Constantine, Algeria
| | - Kemal Yildirim
- Department of Chemistry, Faculty of Science and Letters, Ondokuz Mayis University, Samsun, Turkey
| | - Djamila Zama
- Department of Animal Biology, Faculty of Nature and Life Sciences, University Frères Mentouri 1, Constantine, Algeria
- Research Unit: Valuation of Natural Resources, Bioactive Molecules, Physicochemical and Biological Analyzes (VARENBIOMOL), University Frères Mentouri 1, Constantine, Algeria
| | - Fadila Benayache
- Research Unit: Valuation of Natural Resources, Bioactive Molecules, Physicochemical and Biological Analyzes (VARENBIOMOL), University Frères Mentouri 1, Constantine, Algeria
| | - Samir Benayache
- Research Unit: Valuation of Natural Resources, Bioactive Molecules, Physicochemical and Biological Analyzes (VARENBIOMOL), University Frères Mentouri 1, Constantine, Algeria
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Lahneche AM, Boucheham R, Ozen T, Altun M, Boubekri N, Demirtas I, Bicha S, Bentamene A, Benayache F, Benayache S, Zama D. In vitro antioxidant, DNA-damaged protection and antiproliferative activities of ethyl acetate and n-butanol extracts of Centaurea sphaerocephalaL. AN ACAD BRAS CIENC 2019; 91:e20180462. [PMID: 31553365 DOI: 10.1590/0001-3765201920180462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 08/20/2018] [Indexed: 11/21/2022] Open
Abstract
This study aimed to evaluate the in vitro antiproliferative and inhibition of oxidative DNA-damage activities of n-butanol (n-BuOH) extract of Centaurea sphaerocephala. The in vitro antioxidant activity of the ethyl acetate (EtOAc) and the n-BuOH extracts of this plant were also assayed. To investigate the antioxidant potential, extracts were tested for their capacity to scavenge 1,1-diphenyl-2-picrylhydrazyl (DPPH·) and to inhibit lipid peroxidation using the TBARs method. The contents of total phenolics and flavonoids were measured. Additionally, antiproliferative activity and DNA-damage inhibition of the n-BuOH extract was determined using XCELLigence RTCA instrument and photolyzing 46966 plasmid, respectively. The results exhibited that the scavenging abilities of the EtOAc extract were better than the n-BuOH extract with an IC50= 11.59 µg/mL and 16.67 µg/mL for both extracts, respectively. The phenolic and flavonoid contents were found higher in the n-BuOH and EtOAc extracts. Furthermore, our results showed that n-BuOH extract exhibited a remarkable inhibition of lipid peroxidation with an IC50 of 340.94±7.49 μg/mL and had an antiproliferative effect against Hela cells. Extracts of C. sphaerocephala showed antioxidant activity on scavenging DPPH·. In addition, the n-BuOH extract inhibited the lipid peroxidation and exhibited an antiproliferative effect against HeLa cells line (human cervix carcinoma).
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Affiliation(s)
- Amina M Lahneche
- Département de Biologie Animale, Faculté des Sciences de la Nature et de la Vie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie.,Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
| | - Ratiba Boucheham
- Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
| | - Tevfik Ozen
- Department of Chemistry, Faculty of Science and Arts, Ondokuz Mayis University, Kurupelit Campus, 55139 Samsun, Turkey
| | - Muhammed Altun
- Plant Research Laboratory, Chemistry Department, Cankiri Karatekin University, Uluyazı Campus, 18100 Cankiri, Turkey
| | - Nassima Boubekri
- Département de Biologie Animale, Faculté des Sciences de la Nature et de la Vie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie.,Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
| | - Ibrahim Demirtas
- Plant Research Laboratory, Chemistry Department, Cankiri Karatekin University, Uluyazı Campus, 18100 Cankiri, Turkey
| | - Sabrina Bicha
- Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
| | - Ali Bentamene
- Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
| | - Fadila Benayache
- Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
| | - Samir Benayache
- Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
| | - Djamila Zama
- Département de Biologie Animale, Faculté des Sciences de la Nature et de la Vie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie.,Unité de Recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Département de Chimie, Université Frères Mentouri, Constantine 1, Route d'Aïn El Bey, 25000 Constantine, Algérie
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Bulut F, Demirtas I, Koldas S, Gul F, Behcet L, Ozen T, Oke-Altuntas F. The cytotoxicity and antioxidant activity analysis of the isolated constituents and extracts from endemic Centaurea derderiifolia. Nat Prod Res 2019; 35:1919-1922. [PMID: 31334668 DOI: 10.1080/14786419.2019.1644507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
It is aimed to investigate the cytotoxic effects of the various extracts from the leaf and seed of Centaurea derderiifolia on the growth human cervical adenocarcinoma (HeLa) cells by xCELLigence method and to isolate the cytotoxic constituents. The results showed that subfractions 2 and 3 exhibited remarkable inhibitory effect against HeLa (IC50 < 10 µg/mL). The chloroform extract of leaf displayed the highest cytotoxic effect on HeLa cells (IC50 < 50 µg/mL) and was therefore subjected to a bioassay-guided multistep separation procedure. The pure compounds were elucidated by spectroscopic and mass-spectrometric analyses, including 1 D-, 2 D-NMR. In addition to cytotoxic effects of the isolated constituents, their antioxidant activities were also studied. On the other hand, subfraction 4 exhibited the highest DPPH radical scavenging activity (IC50 = 0.76 ± 0.03 mg/mL). β-sitosterol-3-O-β-d-glucopyranoside was isolated for the first time from this plant and three compounds from the bioactive subfractions were identified.
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Affiliation(s)
- Fatma Bulut
- Department of Chemistry, Faculty of Science, Çankırı Karatekin University, Çankırı, Turkey
| | - Ibrahim Demirtas
- Department of Chemistry, Faculty of Science, Çankırı Karatekin University, Çankırı, Turkey
| | - Serkan Koldas
- Department of Chemistry, Faculty of Science, Çankırı Karatekin University, Çankırı, Turkey
| | - Fatih Gul
- Department of Chemistry, Faculty of Science, Çankırı Karatekin University, Çankırı, Turkey
| | - Lutfi Behcet
- Department of Biology, Faculty of Arts and Sciences, Bingöl University, Bingöl, Turkey
| | - Tevfik Ozen
- Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayıs University, Samsun, Turkey
| | - Feyza Oke-Altuntas
- Department of Biology, Faculty of Science, Gazi University, Ankara, Turkey
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Bekhouche K, Ozen T, Boussaha S, Koldas S, Yenigun S, Lassed S, Demirtas I, Benayache F, Benayache S, Zama D. Anti-oxidant, DNA-damage protection and anti-cancer properties of n-butanol extract of the endemic Perralderia coronopifolia. BANGL J PHARMACOL 2018. [DOI: 10.3329/bjp.v13i1.34255] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
<p class="Abstract">This study was designed to evaluate in vitro the total phenolic, flavonoid content, anti-oxidant activity, oxidative DNA-damage protection and anti-cancer activity of n-butanol extract from Perralderia coronopifolia, endemic plant. DNA protection capacity was performed using 46966 plasmid DNA against UV-photolysis of H<sub>2</sub>O<sub>2</sub>-induced oxidative damage. The anti-prolifer-ative effects of extract were performed on HeLa and C6 cells. Experimental results showed that extract had convenient number of phenolic and flavonoids. Furthermore, it provided strong anti-oxidant, reducing power, hydrogen peroxide and higher DPPH· scavenging ability with IC<sub>50</sub>= 7.02 ± 0.02 µg/mL. As it shown an oxidative plasmid DNA-damage inhibition against UV-photolysis of H<sub>2</sub>O<sub>2</sub>, an anti-cancer activity athigher concentrations in cells. The data obtained that P. coronopifolia extract could be useful in human protection against infection and degenerative illness.</p>
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Ozen T, Yildirim K, Toka M. The impacts of Elaeagnus umbellata Thunb. leaf and fruit aqueous extracts on mice hepatic, extrahepatic antioxidant and drug metabolizing enzymes related structures. BRAZ J PHARM SCI 2018. [DOI: 10.1590/s2175-97902017000317095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Ozen T, Yenigun S, Altun M, Demirtas I. Phytochemical Constituents, ChEs and Urease Inhibitions, Antiproliferative and Antioxidant Properties of Elaeagnus umbellata Thunb. Comb Chem High Throughput Screen 2017; 20:559-578. [PMID: 28137214 DOI: 10.2174/1386207320666170127161837] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 01/02/2017] [Accepted: 01/13/2017] [Indexed: 11/22/2022]
Abstract
AIM AND OBJECTIVE Due to the common ethnopharmacological used or scientifically examined biochemical properties, Elaeagnaceae family, Elaeagnus umbellate (Thunb.) (EU, Guz yemisi) was worth investigating. MATERIALS AND METHODS In this investigation, we revealed antioxidant, antiproliferative and enzyme inhibition activities of the water, methanol, ethanol, acetone, ethyl acetate and hexane extracts of EU as well as the contents of their phenolic, flavonoid, anthocyanin, ascorbic acid, lycopene and β- carotene. The antioxidant activity was screened by total antioxidant (phosphomolybdenum), inhibition of linoleic acid peroxidation, reducing power, 2-deoxyribose degradation assay, H2O2 scavenging and metal chelating activities of the samples were tested in vitro. Additionally, the scavenging activities of the extracts were determined against 1,1-diphenyl-2-picrylhydrazyl (DPPH˙), 2,2-azino-bis(3-ethylbenzothiazloine-6-sulfonicacid (ABTS˙+), superoxide anion and peroxide radicals. The samples were determined for their inhibitory activities against urease, acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). In vitro, antiproliferative activities of six different extracts were tested using the xCELLigence system against HeLa and HT29 cell lines. RESULTS The antioxidant activities of the extracts were found higher than standard antioxidants. The water extracts of fruit and leaf showed the best antioxidant activity. In inhibition assays of urease, AChE and BuChE, all extracts exhibited remarkable inhibition potential. Ethyl acetate extracts, especially, showed better inhibition capacity. It was found that the antioxidant activities of the extracts presented consistently with their chemical contents. The antiproliferative activities of leaf extracts were more effective than the fruit extracts. The chromatographic methods were applied to the different solvents to analyses phenolic secondery metabolites. It was found that fumaric acid, 4- hydroxybenzoic acid, rutin and quercetin-3-β-D-glucoside, neohesperidin, hesperidin determined to have higher contents all the extracts. CONCLUSION EU can be suggested as a potential natural source of antioxidants appropriate for utilization in nutritional/pharmaceutical fields.
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Affiliation(s)
- Tevfik Ozen
- Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayis University, 55139 Samsun, Turkey
| | - Semiha Yenigun
- Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayis University, 55139 Samsun, Turkey
| | - Muhammed Altun
- Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayis University, 55139 Samsun, Turkey
| | - Ibrahim Demirtas
- Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayis University, 55139 Samsun, Turkey
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Koldaş S, Demirtas I, Ozen T, Demirci MA, Behçet L. Phytochemical screening, anticancer and antioxidant activities of Origanum vulgare L. ssp. viride (Boiss.) Hayek, a plant of traditional usage. J Sci Food Agric 2015; 95:786-798. [PMID: 25200133 DOI: 10.1002/jsfa.6903] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 08/22/2014] [Accepted: 09/02/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND A detailed phytochemical analysis of Origanum vulgare L. ssp. viride (Boiss.) Hayek was carried out and the antioxidant activities of five different crude extracts were determined. The antiproliferative activities of the extracts were determined using the xCELLigence system (Real Time Cell Analyzer). RESULTS Differences between the essential oil and volatile organic compound profiles of the plant were shown. The main component of the essential oil was caryophyllene oxide, while the main volatile organic compounds were sabinene and eucalyptol as determined by HS-GC/MS. Phenolic contents of the extracts were determined qualitatively and quantitatively by HPLC/TOF-MS. Ten phenolic compounds were found in the extracts from O. vulgare and Origanum acutidens: rosmarinic acid (in highest abundance), chicoric acid, caffeic acid, p-coumaric acid, gallic acid, quercetin, apigenin-7-glucoside, kaempferol, naringenin and 4-hydroxybenzaldehyde. CONCLUSION This study provides first results on the antiproliferative and antioxidant properties and detailed phytochemical screening of O. vulgare ssp. viride (Boiss.) Hayek.
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MESH Headings
- Antineoplastic Agents, Phytogenic/analysis
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Antioxidants/analysis
- Antioxidants/chemistry
- Antioxidants/isolation & purification
- Antioxidants/pharmacology
- Bicyclic Monoterpenes
- Cell Proliferation/drug effects
- Cyclohexanols/analysis
- Cyclohexanols/chemistry
- Cyclohexanols/isolation & purification
- Cyclohexanols/pharmacology
- Drug Discovery
- Ethnopharmacology
- Eucalyptol
- Flowers/chemistry
- Flowers/growth & development
- HeLa Cells
- Humans
- Medicine, Traditional
- Molecular Structure
- Monoterpenes/analysis
- Monoterpenes/chemistry
- Monoterpenes/isolation & purification
- Monoterpenes/pharmacology
- Oils, Volatile/chemistry
- Oils, Volatile/isolation & purification
- Oils, Volatile/pharmacology
- Origanum/chemistry
- Origanum/growth & development
- Phenols/analysis
- Phenols/chemistry
- Phenols/isolation & purification
- Phenols/pharmacology
- Plant Components, Aerial/chemistry
- Plant Components, Aerial/growth & development
- Plant Extracts/chemistry
- Plant Extracts/isolation & purification
- Plant Extracts/pharmacology
- Polycyclic Sesquiterpenes
- Sesquiterpenes/analysis
- Sesquiterpenes/chemistry
- Sesquiterpenes/isolation & purification
- Sesquiterpenes/pharmacology
- Turkey
- Volatile Organic Compounds/analysis
- Volatile Organic Compounds/isolation & purification
- Volatile Organic Compounds/pharmacology
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Affiliation(s)
- Serkan Koldaş
- Department of Chemistry, Faculty of Natural Sciences, Cankiri Karatekin University, 18100, Cankiri, Turkey
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15
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Görgülü S, Ayyildiz S, Kamburoglu K, Gökçe S, Ozen T. Effect of orthodontic brackets and different wires on radiofrequency heating and magnetic field interactions during 3-T MRI. Dentomaxillofac Radiol 2013; 43:20130356. [PMID: 24257741 DOI: 10.1259/dmfr.20130356] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To evaluate the heating and magnetic field interactions of fixed orthodontic appliances with different wires and ligaments in a 3-T MRI environment and to estimate the safety of these orthodontic materials. METHODS 40 non-carious extracted human maxillary teeth were embedded in polyvinyl chloride boxes, and orthodontic brackets were bonded. Nickel-titanium and stainless steel arch wires, and elastic and stainless steel ligaments were used to obtain four experimental groups in total. Specimens were evaluated at 3 T for radiofrequency heating and magnetic field interactions. Radiofrequency heating was evaluated by placing specimens in a cylindrical plastic container filled with isotonic solution and measuring changes in temperature after T1 weighted axial sequencing and after completion of all sequences. Translational attraction and torque values of specimens were also evaluated. One-way ANOVA test was used to compare continuous variables of temperature change. Significance was set at p < 0.05. RESULTS None of the groups exhibited excessive heating (highest temperature change: <3.04 °C), with the maximum increase in temperature observed at the end of the T1 weighted axial sequence. Magnetic field interactions changed depending on the material used. Although the brackets presented minor interactions that would not cause movement in situ, nickel-titanium and stainless steel wires presented great interactions that may pose a risk for the patient. CONCLUSIONS The temperature changes of the specimens were considered to be within acceptable ranges. With regard to magnetic field interactions, brackets can be considered "MR safe"; however, it would be safe to replace the wires before MRI.
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Affiliation(s)
- S Görgülü
- Department of Orthodontics, Dental Health Sciences Center, Gulhane Military Medical Academy, Ankara, Turkey
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16
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Kamburoglu K, Kolsuz E, Murat S, Yüksel S, Ozen T. Proximal caries detection accuracy using intraoral bitewing radiography, extraoral bitewing radiography and panoramic radiography. Dentomaxillofac Radiol 2012; 41:450-9. [PMID: 22868296 DOI: 10.1259/dmfr/30526171] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To compare proximal caries detection using intraoral bitewing, extraoral bitewing and panoramic radiography. METHODS 80 extracted human premolar and molar teeth with and without proximal caries were used. Intraoral radiographs were taken with Kodak Insight film (Eastman Kodak Co., Rochester, NY) using the bitewing technique. Extraoral bitewing and panoramic images were obtained using a Planmeca Promax Digital Panoramic X-ray unit (Planmeca Inc., Helsinki, Finland). Images were evaluated by three observers twice. In total, 160 proximal surfaces were assessed. Intra- and interobserver kappa coefficients were calculated. Scores obtained from the three techniques were compared with the histological gold standard using receiver operating characteristic analysis. Az values for each image type, observer and reading were compared using z-tests, with a significance level of α = 0.05. RESULTS Kappa coefficients ranged from 0.883 to 0.963 for the intraoral bitewing, from 0.715 to 0.893 for the extraoral bitewing, and from 0.659 to 0.884 for the panoramic radiography. Interobserver agreements for the first and second readings for the intraoral bitewing images were between 0.717 and 0.780, the extraoral bitewing readings were between 0.569 and 0.707, and the panoramic images were between 0.477 and 0.740. The Az values for both readings of all three observers were highest for the intraoral bitewing. Az values for the extraoral bitewing images were higher than those of the panoramic images without statistical significance (p > 0.05). CONCLUSION Intraoral bitewing radiography was superior to extraoral bitewing and panoramic radiography in diagnosing proximal caries of premolar and molar teeth ex vivo. Similar intra- and interobserver coefficients were calculated for extraoral bitewing and panoramic radiography.
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Affiliation(s)
- K Kamburoglu
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Konya Yolu, Cankaya, Turkey.
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17
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Ozen T, Darcan C, Aktop O, Turkekul I. Screening of antioxidant, antimicrobial activities and chemical contents of edible mushrooms wildly grown in the black sea region of Turkey. Comb Chem High Throughput Screen 2011; 14:72-84. [PMID: 20958253 DOI: 10.2174/138620711794474079] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Accepted: 09/25/2010] [Indexed: 11/22/2022]
Abstract
The antioxidative activity of the methanol extracts obtained from twelve commonly consumed wild edible mushrooms was investigated according to the phosphomolybdenum method, inhibition of linoleic acid peroxidation, reducing power, metal chelating, O(2)(˙-), DPPH(˙), peroxide and H(2)O(2) scavenging activity in the Black Sea Region of Turky, and compared to standard antioxidant compounds such as a-tocopherol, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), and trolox. Total phenolic compounds, flavonoids, anthocyanins, ascorbic acid, β-carotene and lycopene in the extracts were measured. The antimicrobial activities of extracts were also evalated against gram (-) and (+) bacteria and yeast with disc diffusion method. Hydnum repandum, Lactarius delicious, Lactarius camphoratus, Lactarius piperatus, Ramaria flava, and Agaricus bisporus were greater than α-tocopherol and BHT on antioxidant activity. The lipid peroxidation of L. camphoratus and Lactarius volemus was excellent, and was 58.05% and 61.44% respectively. The DPPH(˙) scavenging effects decreased in the order of R. flava>BHT> Macrolepiota procera>L. camphoratus>L. piperatus>Lactarius volemus>a-tocopherol and were, at 500 µg/ml and were 80.38, 76.61, 69.74, 61.55, 61.47, 61.09, 60.65%, respectively. All the extracts of mushroom also had the stronger chelating effect according to standards. The O(2)(˙-) scavenging effect of extracts of the mushroom species was in order of R. flava>Boletus edulis>Leatiporus sulphureus>M. procera>standards. L. piperatus, L. camphorates, L. volemus, A. bisporus, Chanterellus cibarius, L. sulphureus, H. repandum showed strong antimicrobial activity, especially on E. coli. H. repandum exhibited to be more effective on P. aeruginosa than other bacterial strains.
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Affiliation(s)
- Tevfik Ozen
- Department of Chemistry, Faculty of Art and Sciences, Ondokuz Mayis University, 55139-Samsun, Turky. Turkey.
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18
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Abstract
This study was conducted to evaluate the antioxidative properties of hydroalcoholic (80%) extracts from different parts of Urtica pilulifera L. (Family Urticaceae), including leaf (UPL), flower (UPF), seed (UPS), and root (UPR). Antioxidative activity of the extracts was measured using the ferric thiocyanate method, thiobarbituric acid method, reductive potential, metal chelating, free radical, superoxide anion radical, and hydrogen peroxide scavenging activity. In addition, the results were compared with antioxidants such as tert-butylated hydroxyanisole (BHA), tert-butylated hydroxytoluene (BHT), and α-tocopherol. Total antioxidant activities of UPS, UPF, UPL, UPR, BHA, BHT, and α-tocopherol were 88.79%, 85.13%, 86.72%, 78.46%, 81.31%, 76.12%, and 46.28%, respectively. Like the antioxidant activity, the reducing power and the superoxide anion radical and free radical scavenging activities of UPL, UPF, UPS, and UPR are concentration dependent. A correlation between higher antioxidant activity and the amount of total phenolics was found in the extracts.
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Affiliation(s)
- Tevfik Ozen
- Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayis University, Samsun, Turkey.
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19
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Senel B, Kamburoglu K, Uçok O, Yüksel SP, Ozen T, Avsever H. Diagnostic accuracy of different imaging modalities in detection of proximal caries. Dentomaxillofac Radiol 2011; 39:501-11. [PMID: 21062944 DOI: 10.1259/dmfr/28628723] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE The purpose of this study was to assess the in vitro diagnostic ability of visual inspection, film, charge-coupled device (CCD) sensor, photostimulable phosphor (PSP) sensor and cone beam CT in the detection of proximal caries in posterior teeth compared with the histological gold standard. METHODS Visual inspection, film, CCD, PSP and cone beam CT images were used to detect proximal caries in the mesial and distal surfaces of 138 teeth (276 surfaces). Visual inspection and evaluation of all intraoral digital and conventional radiographs and cone beam CT images were performed twice by three oral radiologists. Weighted kappa coefficients were calculated to assess intra- and interobserver agreement for each image set, and scores were compared with the histological gold standard using receiver operating characteristic (ROC) analysis to evaluate diagnostic ability. RESULTS Intraobserver kappa coefficients calculated for each observer for each method of detecting caries ranged from 0.739 to 0.928. Strong interobserver agreement ranging from 0.631 to 0.811 was found for all detection methods. The highest Az values for all three observers were obtained with the cone beam CT images; however, differences between detection methods were not statistically significant (P > 0.05). CONCLUSION Visual inspection, film, CCD, PSP plates and cone beam CT performed similarly in the detection of proximal caries.
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Affiliation(s)
- B Senel
- Department of Oral Diagnosis and Radiology, Dental Science Centre, Gülhane Military Medical Academy, Etlik, Ankara, Turkey
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20
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Ozen T, Demirtas I, Aksit H. Determination of antioxidant activities of various extracts and essential oil compositions of Thymus praecox subsp. skorpilii var. skorpilii. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.05.103] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ballo A, Närhi T, Akca E, Ozen T, Syrjänen S, Lassila L, Vallittu P. Prepolymerized vs. in situ-polymerized Fiber-reinforced Composite Implants – a Pilot Study. J Dent Res 2010; 90:263-7. [DOI: 10.1177/0022034510384737] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to investigate bone response to bioactive fiber-reinforced composite (FRC) implants under two polymerization conditions. Glass-fiber-dimethacrylate composite was tested as prepolymerized cylinder-shaped FRC implants and as cylindrical FRC implants polymerized in situ with blue light transmitted and scattered by the glass fibers. Ten FRC implants (6 prepolymerized and 4 in situ-polymerized implants) were placed in the right tibias of 3 pigs by means of a press-fit technique. After 12 weeks, light microscopy revealed only mild foreign-body reaction, with no accumulation of inflammatory cells on both the prepolymerized and the in situ-polymerized implants. The prepolymerized implants appeared to be fully integrated, whereas the in situ-polymerized implants were almost completely surrounded by a fibrous capsule. The present study suggests that in situ polymerization of FRC implants results in fibrous capsule formation and prevents integration with bone.
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Affiliation(s)
- A.M. Ballo
- Department of Prosthetic Dentistry
- Department of Biomaterials, University of Gothenburg, Sweden
| | | | - E.A. Akca
- Department of Periodontology, Dental Sciences Center, Gulhane Military Medical Academy, Ankara, Turkey
| | - T. Ozen
- Department of Periodontology, Dental Sciences Center, Gulhane Military Medical Academy, Ankara, Turkey
| | | | - L.V.J. Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20520 Turku, Finland
| | - P.K. Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20520 Turku, Finland
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Kamburoğlu K, Kiliç C, Ozen T, Horasan S. Accuracy of chemically created periapical lesion measurements using limited cone beam computed tomography. Dentomaxillofac Radiol 2010; 39:95-9. [PMID: 20100921 DOI: 10.1259/dmfr/85088069] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The aim was to assess the accuracy and reproducibility of measurements of chemically created periapical lesions using limited cone beam CT. METHODS Periapical lesions were chemically created in 18 mandibular cadaver teeth. Mandibles were dissected buccolingually using a bone-cutting burr. Diameters and depths were measured directly in the cross-sectional slices using a precision digital caliper. The cross-sectional slices were then embedded in wax, and cone beam CT images were acquired using a NewTom 3G Plus scanner with both 6 inch and 9 inch fields of view (FOVs). Two oral radiologists measured the diameter and depth of periapical lesions on the cross-sectional images using the built-in measurement tools. Measurements were repeated after a 1 week interval. Inter- and intraobserver agreement was calculated by ANOVA. Regression analysis was used to test the correlation between the cone beam CT and digital caliper measurements. RESULTS No significant differences were found in diameter or depth measurements between or within observers or between 6 inch and 9 inch FOV images. Regression analysis of diameter and depth measurements made by direct caliper versus 6 inch or 9 inch FOV images revealed a high regression coefficient (for diameter: 6 inch FOV, R(2) = 94.6%; 9 inch FOV, R(2) = 94.8%; P<0.001; for depth: 6 inch FOV, R(2) = 99.3%; 9 inch FOV, R(2) = 99.3%; P<0.001) showing a strong linear relationship. For the diameter, the mean deviation from direct caliper measurements was 0.0625 mm and 0.08958 mm, respectively; for the 6 inch FOV and 9 inch FOV images, and for depth, the mean deviation was, respectively, -0.1001 mm and 0.09875 mm. CONCLUSIONS Cone beam CT yielded highly accurate and reproducible results in the quantitative assessment of periapical lesions.
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Affiliation(s)
- K Kamburoğlu
- Gülhane Military Medical Academy, Dental Science Centre, Oral Diagnosis and Radiology Department, Ankara, Turkey.
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Ozen T, Taş M. Screening and evaluation of antioxidant activity of some amido-carbonyl oxime derivatives and their radical scavenging activities. J Enzyme Inhib Med Chem 2010; 24:1141-7. [PMID: 19772487 DOI: 10.1080/14756360802669981] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The antioxidant activity of some amido-carbonyl oximes containing a C=O and -NH-R adjacent to the oxime group, [Phenyl-C(=O)-C(=N-OH)-N(-H)-Phenyl(-R)] where R= H, 4-chloro, 4-methyl, 4-methoxy, 3,4-dichloro, 3,4-dimethyl, 3-chloro-4-dimethyl, 3-chloro-4-methoxy, naphthyl and an amido-carbonyl dioxime were investigated in vitro by ferric thiocyanate, total reducing power by potassium ferricyanide reduction, 1,1-diphenyl-2- picryl-hydrazyl (DPPH(.)) free radical scavenging, ferrous ions chelating, superoxide anion radical scavenging and hydrogen peroxide scavenging activity assays. The results indicated that the amido-carbonyl oximes have powerful antioxidant capacity.
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Affiliation(s)
- Tevfik Ozen
- Department of Chemistry, Arts and Sciences Faculty, Giresun University, TR-28049 Giresun, Turkey.
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Kamburoglu K, Senel B, Yüksel SP, Ozen T. A comparison of the diagnostic accuracy of in vivo and in vitro photostimulable phosphor digital images in the detection of occlusal caries lesions. Dentomaxillofac Radiol 2010; 39:17-22. [PMID: 20089739 PMCID: PMC3520404 DOI: 10.1259/dmfr/91657756] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2008] [Revised: 12/20/2008] [Accepted: 12/29/2008] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVES The purpose of this study was to compare the accuracy of diagnoses of occlusal caries lesions from digital images captured using a photostimulable phosphor (PSP) sensor under in vivo and in vitro conditions and to present useful clinical data regarding the clinical application of the system. METHODS The study sample comprised 60 mandibular third molars (30 sound and 30 with occlusal caries) requiring extraction. A pre-extraction and post-extraction image of each tooth were acquired using a PSP sensor. A stopwatch was used to record the time required for the clinical procedures. Patient comfort or discomfort during image acquisition was also recorded. Images were evaluated twice by three observers using a five-point scale. Kappa coefficients were calculated to assess intra- and interobserver agreement. Receiver operating characteristic (ROC) curves were used to assess the diagnostic performance of each observer for both in vivo and in vitro images. The t-test was used to compare A(z) values, with a significance level set at 0.05 (alpha _ 0.05). The time required for clinical imaging procedures in patients who claimed discomfort and in those who did not was compared using the Mann-Whitney U-test. RESULTS Intraobserver agreement was almost perfect, whereas interobserver agreement was fair to moderate. No statistically significant differences were found in the accuracy of diagnoses of occlusal caries lesions using in vivo and in vitro digital images. The median time needed for image exposure was 1.04 min and the median time needed to complete the image acquisition procedure was 1.45 min. CONCLUSIONS The diagnosis of accuracy of occlusal caries lesions using in vivo and in vitro digital images yielded similar results.
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Affiliation(s)
- K Kamburoglu
- Ankara University, Faculty of Dentistry, Department of Oral Diagnosis and Radiology, Ankara, Turkey.
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Ozen T, Orhan K, Avsever H, Tunca YM, Ulker AE, Akyol M. Dentin hypersensitivity: a randomized clinical comparison of three different agents in a short-term treatment period. Oper Dent 2009; 34:392-8. [PMID: 19678443 DOI: 10.2341/08-118] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Dentin hypersensitivity, or what patients may describe as "sensitive teeth," is defined as a short, sharp pain arising from exposed dentin in response to thermal, evaporative, tactile, electrical, osmotic or chemical stimuli. It is widely accepted that dentin hypersensitivity is an uncomfortable condition that also affects function and quality of life. This study determines the differences in efficiency of three desensitizing products when compared with a placebo. METHODS A randomized controlled clinical trial was conducted to compare three different professional dentin desensitizer agents in 52 patients. The age and sex of the patients was recorded. Gluma Desensitizer (Heraeus Kulzer), UltraEZ (Ultradent Products, Inc) and Duraphat (Colgate Oral Pharmaceuticals, Inc, New York, NY, USA) were used as desensitizer agents and distilled water was used as the placebo. The baseline measurement of the dentin hypersensitivity was made by using a visual analog scale (VAS). Twenty-four hours and seven days after application of the desensitizer agents and placebo, a new VAS analysis was conducted for patients' sensitivity level. The desensitizer agents were compared in terms of mean values, and ANOVA was used for testing differences among the groups (p<0.05). RESULTS The results showed that the mean pain scores of the placebo group were significantly higher than that of the study groups (p<0.05). The VAS analysis revealed a significant decrease in dentin hypersensitivity over time with the use of agents (p<0.05). No statistically significant difference was found among the three desensitizing agents (p>0.05). CONCLUSIONS These three desensitizing agents, which contain different active ingredients, were effective in relieving dentin hypersensitivity. However, no superiority was found in dentin sensitivity relief among the agents.
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Affiliation(s)
- T Ozen
- Department of Oral Diagnosis and Radiology, School of Dentistry, Gülhane Military Medical Academy, Ankara, Turkey
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Abstract
This report presents a case of osseous choristoma in the submandibular region of a 33-year-old female. Her chief complaint was painless swelling in the submandibular region. Panoramic radiography showed a well-defined, round, radiopaque lesion near the inferior border of the right mandibular angle. Coronal and sagittal tomographic images indicated a high-density area in the right submandibular region with no bony connection. The lesion was diagnosed as an osseous choristoma based on histopathological examination of the surgical specimen. A 1-year follow-up period was uneventful.
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Affiliation(s)
- K Kamburoglu
- Department of Oral Diagnosis and Radiology, Gülhane Military Medical Academy, Dental Science Center, Ankara, Turkey.
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Ozen T, Korkmaz H. The effects of Urtica dioica L. leaf extract on aniline 4-hydroxylase in mice. Acta Pol Pharm 2009; 66:305-309. [PMID: 19645331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The effects of hydroalcoholic (80% ethanol-20% water) extract of Urtica dioica L. on microsomal aniline 4-hydroxylase (A4H) were investigated in the liver of Swiss albino mice (8- 10-weeks-old) treated with two doses (50 and 100 mg/kg body weight, given orally for 14 days ). The activities of A4H showed a significant increase in the liver at both dose levels of extract treatment. The hydroalcoholic extract of Urtica dioica induced the activities of A4H that had been increased by treatment of metal ions (Mg2+ and Ca2+) and the mixture of cofactors (NADH and NADPH). At saturated concentration of cofactor, microsomal A4H exhibited significantly even higher activities in the presence of the mixture of cofactors than NADPH and NADH. Mg2+ and Ca2+ ions acted as stimulants in vitro. The present results suggest that the hydroalcoholic extract of Urtica dioica may have modalatory effect on aniline hydroxylase at least in part and enhance the activity of A4H adding metals ions and cofactors.
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Affiliation(s)
- Tevfik Ozen
- Department of Chemistry, Faculty of Arts and Sciences, Giresun University, TR-28049 Giresun, Turkey.
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Ballo AM, Akca EA, Ozen T, Lassila L, Vallittu PK, Närhi TO. Bone tissue responses to glass fiber-reinforced composite implants - a histomorphometric study. Clin Oral Implants Res 2009; 20:608-15. [DOI: 10.1111/j.1600-0501.2008.01700.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ozen T. Investigation of antioxidant properties of Nasturtium officinale (watercress) leaf extracts. Acta Pol Pharm 2009; 66:187-193. [PMID: 19719054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The objective of this study was to examine the in vitro and in vivo antioxidative properties of aqueous and ethanolic extracts of the leaf of Nasturtium officinale R. Br. (watercress). Extracts were evaluated for total antioxidant activity by ferric thiocyanate method, total reducing power by potassium ferricyanide reduction method, 1,1-diphenyl-2-picrylhydrazyl (DPPH*) radical scavenging activities, superoxide anion radical scavenging activities in vitro and lipid peroxidation in vivo. Those various antioxidant activities were compared to standards such as butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and alpha-tocopherol. The ethanolic extract was found as the most active in total antioxidant activity, reducing power, DPPH* radicals and superoxide anion radicals scavenging activities. Administration of the ethanol extract to rats decreased lipid peroxidation in liver, brain and kidney. These results lead to the conclusion that N. officinale extracts show relevant antioxidant activity by means of reducing cellular lipid peroxidation and increasing antioxidant activity, reducing power, free radiacal and superoxide anion radical scavenging activities. In addition, total phenolic compounds in the aqueous and ethanolic extract of N. officinale were determined as pyrocatechol.
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Affiliation(s)
- Tevfik Ozen
- Giresun University, Faculty of Arts and Sciences, Department of Chemistry, 28049, Giresun, Turkey.
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Ozen T, Korkmaz H. Modulatory effect of Urtica dioica L. (Urticaceae) leaf extract on biotransformation enzyme systems, antioxidant enzymes, lactate dehydrogenase and lipid peroxidation in mice. Phytomedicine 2003; 10:405-415. [PMID: 12834006 DOI: 10.1078/0944-7113-00275] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The effects of two doses (50 and 100 mg/kg body wt given orally for 14 days) of an ethanol-water (80%-20%) extract of Urtica dioica L. and butylated hydroxyanisole (BHA) were investigated, for phase I and phase II enzymes, antioxidant enzymes, lactate dehydrogenase, lipid peroxidation and sulfhydryl groups in the liver of Swiss albino mice (8-9 weeks old). A modulatory effect of two doses and BHA was also observed for the activities of glutathione S-transferase, DT-diaphorase, superoxide dismutase and catalase in the kidney, lung and forestomach, as compared with the control group. The activities of cytochrome b5 (cyt b5), NADH-cytochrome b5 reductase (cyt b5 R), glutathione S-transferase (GST), DT-diaphorase (DTD), glutathione peroxidase (GPx), glutathione reductase (GR), superoxide dismutase (SOD) and catalase (CAT) showed a significant increase in the liver at both dose levels of extract. Both extract-treated showed significantly lower activity of cytochrome P450 (cyt P450), lactate dehydrogenase (LDH), NADPH-cytochrome P450 reductase (cyt P450 R), total sulfhydryl groups (T-SH), nonprotein sulfhydryl groups (NP-SH) and protein-bound sulfhydryl groups (PB-SH). BHA-treated Swiss albino mice showed a notable increase in levels of cyt b5, DTD, T-SH, PB-SH, GPx, GR, and SOD in the liver while, LDH, cyt P450, cyt P450 R, Cyt b5 R, GST, NP-SH, and CAT levels were reduced significantly as compared to control values. The extract was effective in inducing GST, DTD, SOD and CAT activity in the forestomach and SOD and CAT activity in the lung at both dose levels. BHA-treated Swiss albino mice induced DTD, GST and all antioxidative parameters in the kidney, lung and forestomach.
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Affiliation(s)
- T Ozen
- Ondokuz Mayis University, The Faculty of Arts and Sciences, Department of Chemistry, Kurupelit, Samsun-Turkey.
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Güner S, Colak A, Ozen T, Sentürk HB. Characterization of microsomal aniline hydroxylase of rainbow trout, Salmo gairdneri. Indian J Biochem Biophys 1998; 35:11-5. [PMID: 9699413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Aniline hydroxylase from liver microsomes of rainbow trout Salmo gairdneri converted aniline to p-aminophenol, the specific activity being 0.068 nmoles/min/mg protein in potassium phosphate buffer, pH 7.4 at 25 degrees C. The maximal rate of the enzyme reaction was found at aniline concentrations above 5 mM and in the presence of NADPH. Vmax and K(m) were 0.048 nmoles/min/mg and 0.105 mM respectively. The Hill plot showed the Hill constant to be 1.02 indicating one substrate binding site with no cooperativity. Ca2+ and Mg2+ at concentrations ranging between 1-10 mM stimulated the enzyme activity.
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Affiliation(s)
- S Güner
- Department of Chemistry, Karadeniz Technical University, Trabzon, Turkey
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