40 results on '"Gurbuz, I"'
Search Results
2. IGNORING ENVIRONMENTALLY SOUND PRACTICES. FARMERS' MANURE WASTE HANDLING BEHAVIOR AND ITS DETERMINANTS IN TURKEY.
- Author
-
GURBUZ, I. B. and OZKAN, G.
- Subjects
MANURE handling ,FARMERS' attitudes ,PLANNED behavior theory ,AGRICULTURAL wastes ,WASTE storage ,MANURES - Abstract
This paper examines the factors that determine farmers' intention to improve animal waste storage facilities using the Theory of Planned Behavior (TPB). The model was tested using Structural Equation Modelling. Data were collected from 376 small and medium livestock farmers in Turkey. The results showed farmers' intention to improve waste facilities was primarily determined by their attitudes. Subjective norms (SN) and perceived behavioral control (PBC) were almost equally influential. Multiple-Group Analysis determined the effects of control variables. The attitude of less-educated farmers, who owned more extensive livestock operations and relied solely on income from livestock, had a significant and positive effect on the intention to improve farm waste management. SN and PBC were significant determinants of the behavior of farmers' who were more educated, had more prominent families, and employed higher-paid labor. The results will help central and local governments, industry investors, and growers' associations understand farmers' attitudes toward waste storage issues and develop more effective strategies to ensure environmental sustainability and better use of investment and training opportunities. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
3. Surface acoustic waves as a sensitive probe for photoresponsive polarization memory in SrTiO3
- Author
-
Uzun, Y, primary, Gurbuz, I, additional, De Jong, M P, additional, and Van Der Wiel, W G, additional
- Published
- 2020
- Full Text
- View/download PDF
4. General Movements Assessment In Infants With Spinal Muscular Atrophy: A Pilot Study
- Author
-
Lokmanoglu, B. Yardimci, Bulut, N., Aydin, G., Sirtbas, G., Kabakci, F., Porsnok, D., Mutlu, A., Gurbuz, I., Topaloglu, H., Yilmaz, O., Karaduman, A., and Fizyoterapi ve Rehabilitasyon
- Published
- 2019
5. Reliability And Validity Of Trunk Control Measurement Scale In Duchenne Muscular Dystrophy
- Author
-
Bulut, N., Lokmanoglu, B. Yardimci, Aydin, G., Kabakci, F., Atci, M., Gurbuz, I., Topaloglu, H., Karaduman, A., Yilmaz, O., and Fizyoterapi ve Rehabilitasyon
- Published
- 2019
6. Fatty acid content of three Cistus species growing in Turkey
- Author
-
Ustun, O., Gurbuz, I., Kusmenoglu, S., and Turkoz, S.
- Published
- 2004
- Full Text
- View/download PDF
7. WHAT’S GOING ON AT THE UNIVERSITIES? HOW MUCH HAS THE RESEARCH REVEALED UNIVERSITY STUDENTS’ ATTITUDES TOWARDS THE ENVIRONMENT? A CASE STUDY OF BURSA, TURKEY
- Author
-
GURBUZ, I B, primary and OZKAN, G, additional
- Published
- 2019
- Full Text
- View/download PDF
8. Surface acoustic waves as a sensitive probe for photoresponsive polarization memory in SrTiO3.
- Author
-
Uzun, Y, Gurbuz, I, De Jong, M P, and Van Der Wiel, W G
- Subjects
- *
ACOUSTIC surface waves , *TRANSMISSION of sound , *INTERDIGITAL transducers , *ELECTRIC transients , *ELECTRIC fields , *PIEZOELECTRICITY - Abstract
Transient electric polarization in single crystalline SrTiO3 (STO) substrates was studied by measuring the transmission of surface acoustic waves (SAWs). We applied a large dc electric field (8 × 106 Vm−1) to interdigital transducers (IDTs) on STO substrates in order to induce local piezoelectricity, which is required to generate and transmit SAWs. The resulting electric polarization and the retention thereof were analyzed as a function of time after the applied electric field was removed, by measuring transient SAW signals. The retained polarization turned out to provide strong electromechanical coupling, comparable to that resulting from the dc-field-induced piezoelectricity. SAW signals were observed for more than 30 h (in absence of an external dc electric field), which is evidence for a long-lasting retention of electric polarization. Remarkably, this polarization was found to be rapidly suppressed as the sample was exposed to visible light. By measuring the transient SAW transmission under illumination with light at different wavelengths, we identified photoconductivity and/or acceleration of oxygen vacancy migration by photon-induced splitting of bound vacancy pairs as the main mechanisms behind this photoresponsive memory effect. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
9. Surface acoustic waves as a sensitive probe for photoresponsive polarization memory in SrTiO3.
- Author
-
Uzun, Y, Gurbuz, I, De Jong, M P, and Van Der Wiel, W G
- Subjects
ACOUSTIC surface waves ,TRANSMISSION of sound ,INTERDIGITAL transducers ,ELECTRIC transients ,ELECTRIC fields ,PIEZOELECTRICITY - Abstract
Transient electric polarization in single crystalline SrTiO
3 (STO) substrates was studied by measuring the transmission of surface acoustic waves (SAWs). We applied a large dc electric field (8 × 106 Vm−1 ) to interdigital transducers (IDTs) on STO substrates in order to induce local piezoelectricity, which is required to generate and transmit SAWs. The resulting electric polarization and the retention thereof were analyzed as a function of time after the applied electric field was removed, by measuring transient SAW signals. The retained polarization turned out to provide strong electromechanical coupling, comparable to that resulting from the dc-field-induced piezoelectricity. SAW signals were observed for more than 30 h (in absence of an external dc electric field), which is evidence for a long-lasting retention of electric polarization. Remarkably, this polarization was found to be rapidly suppressed as the sample was exposed to visible light. By measuring the transient SAW transmission under illumination with light at different wavelengths, we identified photoconductivity and/or acceleration of oxygen vacancy migration by photon-induced splitting of bound vacancy pairs as the main mechanisms behind this photoresponsive memory effect. [ABSTRACT FROM AUTHOR]- Published
- 2020
- Full Text
- View/download PDF
10. Antiviral and antimicrobial activities of three sesquiterpene lactones from Centaurea solstitialis L. ssp solstitialis [Meeting Abstract]
- Author
-
Gurbuz, I, Ozcelik, B, Karaaoglu, T, Yesilada, E, Gurbuz, I, Ozcelik, B, Karaaoglu, T, Yesilada, E, and Yeditepe Üniversitesi
- Abstract
… Soc Medicinal Plant Res, Univ Helsinki,Fac Pharm
- Published
- 2006
11. Effect of Different Processing Technologies on Chemical Properties of Wild-Grown Edible MushroomMacrolepiota procera var. procera(Scop.)
- Author
-
Aydin, Emine, primary, Gurbuz, I. Bulent, additional, Karahan, Hasan, additional, and Basdar, Canan, additional
- Published
- 2016
- Full Text
- View/download PDF
12. The prevalence and risk factors of Human Papillomavirus in female sex workers in Turkey
- Author
-
gurbuz, i, sehirali, s, gunes, h, SERİN SENGER, SÜHEYLA, KÖSE, ŞÜKRAN, and ersan, g
- Published
- 2013
13. Folk medicines of camlidere (Ankara)
- Author
-
Gurbuz, I, Gunbatan, T., and Ozkan, Gencler A. M.
- Published
- 2011
14. Effect of Different Processing Technologies on Chemical Properties of Wild-Grown Edible Mushroom Macrolepiota procera var. procera (Scop.).
- Author
-
Aydin, Emine, Gurbuz, I. Bulent, Karahan, Hasan, and Basdar, Canan
- Subjects
- *
EDIBLE mushrooms , *COMPOSITION of fungi , *MANUFACTURING processes , *FUNGAL moisture , *PERISHABLE goods , *MORPHOLOGY - Abstract
In this study effects of different processing technologies (drying, canning, and freezing) on morphological properties and chemical composition of wild grown edible mushroom Macrolepiota procera var. procera (Scop.) ( M. procera) were investigated. For this purpose before the analyses measured the weight, pileus width, stipe length, and stipe diameter (69.94 g, 118.26, 143.82 cm, and 13.60 mm, respectively) of clean mushrooms. After that moisture, ash, crude protein, fat, carbohydrate and energy values of fresh, dried, canned, and freezed wild edible mushrooms were investigated. Moisture, ash, crude protein, fat, and carbohydrate were 10.79-90.56, 0.37-37.92, 2.05-39.68, 0.70-4.23, 2.35-7.10% of dry weight, respectively. And energy value estimated 39.13-206.62 kcal (165.42-872.87 kJ). Practical Applications Wild edible mushrooms are not only an important nutritional source but also an important livelihood. Mushrooms have high amount of moisture content and fragile structure. Therefore, mushrooms are highly perishable. After harvest mushrooms lose their quality immediately. In view of these mushroom requires some treatment to prevent its deterioration. The aim of this study is to determine the effects of different processing methods (drying, canning, and freezing) on morphological properties (the pileus width, the stipe length, the stipe diameter, weight of the mushroom, and color measurement), chemical contents (moisture, ash, crude protein, fat), carbohydrate and energy values of wild edible mushroom Macrolepiota procera var. procera (Scop.) [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
15. Chemical Characterization and Genomic Profiling of Achillea biebersteinii from Various Localities in Central Turkey
- Author
-
Techen, N, primary, Tabanca, N, additional, Demirci, B, additional, Gurbuz, I, additional, Pan, Z, additional, Khan, IA, additional, Demirci, F, additional, Wedge, DE, additional, and Baser, KHC, additional
- Published
- 2009
- Full Text
- View/download PDF
16. Anti-ulcerogenic effect of Momordica charantia L. fruits on various ulcer models in rats
- Author
-
Gurbuz, I., Akyuz, C., Yesilada, E., and Sener, B.
- Published
- 2000
- Full Text
- View/download PDF
17. Screening of Turkish anti-ulcerogenic folk remedies for anti-Helicobacter pylori activity
- Author
-
Yesilada, E., Gurbuz, I., and Shibata, H.
- Published
- 1999
- Full Text
- View/download PDF
18. Fatty acid content of threeCistusspecies growing in Turkey.
- Author
-
Ustun, O., Gurbuz, I., Kusmenoglu, S., and Turkoz, S.
- Subjects
EDIBLE fats & oils ,FATTY acids ,PALMITIC acid ,LINOLEIC acid ,LINOLENIC acids ,UNSATURATED fatty acids - Abstract
The seed oils ofCistus laurifolius, C. salviifolius, andC. creticuswere investigated for their fatty acids by employing capillary GC and capillary GC-MS. The results of this study indicated that palmitic, linoleic, linolenic, oleic, stearic, and behenic acids were found in all of these three seed oils of Turkish origin. In addition, an important polyunsaturated fatty acid, linoleic acid, was the major fatty acid in all of these oil samples. [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
- View/download PDF
19. Folk medicine in Duzce Province (Turkey)
- Author
-
Ayşe Mine Gençler Özkan, Ece Salihoğlu, Tuğba Günbatan, Erdem Yesilada, Galip Akaydin, Fatih Demirci, İlhan Gürbüz, Anadolu Üniversitesi, Gürbüz, İ., Gençler Özkan, A.M., Akaydin, G., Salihoğlu, E., Günbatan, T., Demirci, F., Yeşilada, Erdem, Yeditepe Üniversitesi, Gurbuz, I, Gencler Ozkan, AM, Akaydin, G, Salihoglu, E, Gunbatan, T, Demirci, F, and Yesilada, E
- Subjects
Folk medicine ,Duzce ,Turkey ,Ethnobotany ,Plant Science ,Ancient history ,ethnobotany ,Turkish medicinal plants ,Geography ,Botany ,Folk medicine,Düzce,ethnobotany,Turkish medicinal plants,Turkey ,Düzce - Abstract
Demirci, Fatih/0000-0003-1497-3017; YESILADA, ERDEM/0000-0002-1348-6033; GENCLER OZKAN, AYSE MINE/0000-0002-2220-0033; Miser Salihoglu, Ece/0000-0003-0681-3566, WOS: 000499975800007, The present study was conducted to collect, record, and document local knowledge of medicinal practices in Duzce, a northwestern Anatolian province. To the best of our knowledge, no comprehensive ethnobotanical study has been reported from this province. Information was acquired through semistructured interviews and personal conversations using a questionnaire and numerous guided field trips with local knowledgeable people. For quantitative analyses and comparisons, recorded data such as informant consensus factor (F-IC) and use value (UV) were calculated, respectively. As a result of extensive field studies, 122 taxa were determined as folk medicines; 76 of were wild and 46 were cultivated. the identified medicinal plants were mainly from the family Rosaceae, followed by Compositae, Apiaceae, Lamiaceae, and Solanaceae, respectively. Among the preparations used, liquid forms such as infusions (30.2%) or decoctions (16.4%) represented the most favored ways to administer medicinal plants. Dermatological disorders had the highest F-IC score with a value of 0.75 followed by skeletomuscular (F-IC = 0.7466), gastrointestinal (F-IC = 0.6666), immunological (F-IC = 0.6615), and respiratory (F-IC = 0.6292) system disorders, among others. the most prominent medicinal plants were Urtica dioica (UV = 0.4352), Plantago major (UV = 0.3056), Rubus ulmifolius (UV = 0.2279), and Sambucus ebulus (UV = 0.2279). According to the present study, the number of people who recognize and use the wild plants of Duzce, and those of the rest of Anatolia, is steadily decreasing. the ethnobotanical knowledge cannot be passed to the next generation in its entirety if it is not properly recorded. in addition to this gradual loss of knowledge, modern information pollution and contamination via the popular media highlight the urgent need to record this precious knowledge before it is lost., Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TBAG-108T253], This study was financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK Grant Number: TBAG-108T253). This study is dedicated to the late pharmacist Nahit Altan in recognition of his interests and contributions.
- Published
- 2019
20. Antiviral and antimicrobial activities of three sesquiterpene lactones from Centaurea solstitialis L. ssp. solstitialis
- Author
-
Erdem Yesilada, T. Karaaoglu, İlhan Gürbüz, Berrin Özçelik, Özçelik, B., Gürbüz, I., Karaoglu, T., Yeşilada, E., Yeditepe Üniversitesi, Ozcelik, B, Gurbuz, I, Karaoglu, T, and Yesilada, E
- Subjects
viruses ,Pharmaceutical Science ,Centaurea ,Pharmacy ,Pharmacognosy ,Sesquiterpene ,medicine.disease_cause ,Antiviral Agents ,Pharmaceutical microbiology ,Microbiology ,Virus ,Enterococcus faecalis ,Analytical Chemistry ,Centaurea solstitialis ,Lactones ,chemistry.chemical_compound ,13-acetyl solstitialin a ,Chlorocebus aethiops ,Drug Discovery ,Botany ,medicine ,Animals ,Antifungal activity ,Antiviral activity ,Candida albicans ,Vero Cells ,Pharmacology ,Bacteria ,Traditional medicine ,biology ,Plant Extracts ,business.industry ,Organic Chemistry ,biology.organism_classification ,Antimicrobial ,Anti-Bacterial Agents ,Complementary and alternative medicine ,chemistry ,Staphylococcus aureus ,Viruses ,Molecular Medicine ,Antibacterial activity ,business ,Sesquiterpenes - Abstract
Three sesquiterpene lactones (centaurepensin = chlorohyssopifolin A, chlorojanerin and 13-acetyl solstitialin A) isolated from the aerial parts of Centaurea solstitialis L. ssp. solstitialis (Asteraceae) were investigated for antimicrobial and antiviral activities. For the antimicrobial. activity assessment, both standard and isolated strains of Escherichia coli, Pseudomonas aeruginosa, Enterococcus faecalis, Staphylococcus aureus, Candida albicans and C. parapsilosis were employed by the microditution method. Herpes simplex type-1, a DNA virus, and Parainfluenza, an RNA virus, were employed for the determination of the antiviral activity of these three sesquiterpene tactones using Vero cell tines. Ampicilline, ofloxocine, ketoconazole, fluconazole, acyclovir and oseltamivir were used as the reference drugs. 13-Acetyl solstitialin A displayed remarkable antibacterial activity against isolated strains of E. faecalis at 1 mu g/ml concentration, which was close to the effective concentrations of ampicillin. The same compound also showed significant activity against the DNA virus, being as potent as the reference compound acyclovir at maximum and minimum concentrations of 16
- Published
- 2009
- Full Text
- View/download PDF
21. Comparison of the volatiles of Daphne pontica L. and D. oleoides Schreber subsp. oleoides isolated by hydro- and microdistillation methods
- Author
-
Gerhard Franz, Kemal Hüsnü Can Başer, Fatih Demirci, İlhan Gürbüz, Erdem Yesilada, Betül Demirci, Gürbüz, İlhan, Demirci, Betül, Franz, Gerhard, Başer, Kemal Hüsnü Can, Yeşilada, Erdem, Demirci, Fatih, Yeditepe Üniversitesi, Anadolu Üniversitesi, Eczacılık Fakültesi, Farmakognozi Anabilim Dalı, Başer, K. Hüsnü Can, Gurbuz, I, Demirci, B, Franz, G, Baser, KHC, Yesilada, E, and Demirci, F
- Subjects
Volatiles ,Microdistillation ,Physiology ,Nonanal ,DPPH ,gas chromatography ,Nonacosane ,Daphne pontica ,Dihydroactinidiolide ,antioxidant activity ,Microbiology ,Daphne Sp ,essential oil ,Hydrodistillation ,Gas Chromatography-Mass Spectrometry ,chemistry.chemical_compound ,Phytol ,Genetics ,Carvacrol ,Molecular Biology ,Thymol ,Key words: Daphne sp.,essential oil,volatiles,hydrodistillation,microdistillation,gas chromatography,gas chromatography-mass spectrometry,antioxidant activity ,Gas Chromatography ,Chromatography ,biology ,microdistillation ,Antioxidant Activity ,Daphne sp ,hydrodistillation ,Cell Biology ,biology.organism_classification ,gas chromatography-mass spectrometry ,Essential Oil ,volatiles ,chemistry ,General Agricultural and Biological Sciences ,Biyoloji - Abstract
WOS: 000321227600014, Aerial parts of Daphne pontica were collected from Ilgaz-cankiri, and D. oleoides subsp. oleoides was collected from 2 different localities (Ayranci-Karaman and Ilgaz-Cankiri) in Turkey. The samples were subjected to hydrodistillation and microdistillation. The resulting volatile samples were analyzed both by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS), respectively. The main components for D. pontica were identified as hexahydrofarnesyl acetone (8.6%), carvacrol (8.5%), dihydroedulane 11 (4.7%), (E)-geranyl acetone (4.6%), and thymol (4.5%), while nonacosane (42.5% and 27.2%), hexadecanoic acid (24.4% and 20.0%), phytol (12.3%), and carvacrol (5.0%) were identified as the main components of D. oleoides subsp. oleoides obtained by hydrodistillation. Carvacrol (12.0%), thymol (7.7%), dihydroactinidiolide (7.2%), bicydosesquiphellandrene (5.5%), and (Z)-3-hexenal (4.1%) were the major components in D. pontica, while carvacrol (27.2% and 25.4%), nonacosane (24.6%), (Z)-3-hexenal (18.5% and 2.5%), decane (7.4%), hexahydrofarnesyl acetone (7.4% and 2.2%), hexanal (6.6% and 1.5%), heptacosane (6.1%), nonanal (5.6% and 1.9%), thymol (5.1% and 2.3%), and phytol (5.0%) were identified in the D. oleoides subsp. oleoides isolated by microdistillation, respectively. In addition, the volatile components were evaluated for their ability to scavenge 1,1-dipheny1-2-picrylhydrazyl (DPPH) radicals using a bioautographic thin layer chromatography (TLC) method, and the samples showed activity comparable with that of the tested standards, vitamins C and E.
- Published
- 2013
22. Characterization of volatiles and anti-ulcerogenic effect of Turkish sweetgum balsam (Styrax liquidus)
- Author
-
Fatih Demirci, Ekrem Sezik, Betül Demirci, İlhan Gürbüz, Erdem Yesilada, Kemal Hüsnü Can Başer, Anadolu Üniversitesi, Eczacılık Fakültesi, Farmakognozi Anabilim Dalı, Demirci, Betül, Demirci, Fatih, Başer, K. Hüsnü Can, Gurbuz, I., Yeşilada, Erdem, Demirci, B., Sezik, E., Demirci, F., Baser, K.H.C., and Yeditepe Üniversitesi
- Subjects
Balsam ,Male ,Styrax liquidus ,Liquidus ,Anti-Ulcerogenic Activity ,Styrax ,Styrene ,Rats, Sprague-Dawley ,chemistry.chemical_compound ,Hamamelidaceae ,Turkish Sweetgum ,Gc-Ms Analysis ,Drug Discovery ,Liquidambar orientalis ,Botany ,Oils, Volatile ,Animals ,Stomach Ulcer ,Turkish sweetgum ,GC-MS analysis ,Pharmacology ,Cinnamyl alcohol ,biology ,Traditional medicine ,Ethanol ,Plant Extracts ,Anti-ulcerogenic activity ,biology.organism_classification ,Anti-Ulcer Agents ,Rats ,chemistry ,Liquidambar Orientalis ,Altingiaceae ,Female ,Gas chromatography ,Styrax Liquidus ,Phytotherapy - Abstract
WOS: 000321163000043, PubMed ID: 23588094, Ethnopharmacological relevance: Sweetgum, Styrax liquidus (Turkish sweetgum) is a resinous exudate obtained from the wounded barks of Liquidambar orientalis Miller tree which belongs to Altingiaceae (Hamamelidaceae). The plant material has been used for the treatment of peptic ulcer symptoms in Turkish folk medicine since centuries. In order to evaluate the claimed activity, we studied the anti-ulcerogenic effect of Styrax liquidus by using an in vivo anti-ulcerogenic activity model and to determine the chemical composition of the balsam. Materials and methods: Anti-ulcerogenic effects of the balsam "Styrax liquidus" itself and its fractions obtained by successive solvent extractions with chloroform and n-butanol, were investigated against the ethanol-induced peptic ulcer model in rats. The chloroform extract demonstrated a statistically significant gastroprotective effect. In addition, the chemical characterization of the volatiles obtained by microdistillation technique from the balsam and the sub-extracts were analyzed by gas chromatography (GC) and gas chromatography mass spectrometry (GC MS), respectively. Results: Pharmacological experiments have clearly demonstrated that 150 and 300 mg/kg doses of Styrax liquidus given orally to rats showed significant gastric protection. On GC MS analysis of the resin, overall, 31 compounds representing 99.8% of the total oil were identified where styrene (81.9%), cinnamyl alcohol (6.9%) and alpha-pinene (3.5%) were identified as the major components. Conclusion: Present study confirmed the anti-ulcerogenic activity of the local ethnobotanical usage of Styrax liquidus in Turkey, Research Foundation of Gazi University [EF-02/2001-6], This study was financially supported by Research Foundation of Gazi University (No: EF-02/2001-6). This work was presented in BIHAT (Plant Originated Crude Drug Symposium), October 2010, Mersin-Turkey.
- Published
- 2012
23. Evaluation Of The Antiulcerogenic Activity Profile Of A Flavonol Diglucoside From Equisetum Palustre L
- Author
-
İlhan Gürbüz, Erdem Yesilada, Yeşilada, Erdem, Gurbuz, I., and Yeditepe Üniversitesi
- Subjects
Male ,Flavonols ,Equisetum ,Flavonoid ,Drug Evaluation, Preclinical ,Equisetaceae ,Pharmacology ,Pharmacognosy ,Equisetum palustre ,Rats, Sprague-Dawley ,chemistry.chemical_compound ,Mice ,Glucosides ,Drug Discovery ,Gastric mucosa ,medicine ,Animals ,Stomach Ulcer ,chemistry.chemical_classification ,Peptic ulcer ,Traditional medicine ,biology ,business.industry ,Plant Extracts ,Kaempferol diglucoside ,Plant Components, Aerial ,biology.organism_classification ,Anti-Ulcer Agents ,digestive system diseases ,Rats ,medicine.anatomical_structure ,chemistry ,Gastric Mucosa ,Antiulcer activity ,Gastric acid ,Cysteamine ,Female ,business ,Kaempferol - Abstract
Ethnopharmacological relevance: The aerial parts of Equisetum palustre L. are used to treat peptic ulcer disease in Turkey. In a previous study, a flavonol diglucoside i.e., kaempferol 3-O-1¨-ß-d-glucopyranosyl-3-O-1¨'-ß-d-glucopyranoside (KGG) was isolated as the major antiulcerogenic constituent from the plant. Aim of the study: The present study was undertaken to evaluate the antiulcer activity profile of KGG using various in vivo experimental ulcer models as well as by assessing gastric biochemical parameters. Material and methods: KGG was obtained from the ethanol extract of the aerial parts of the plant by successive chromatographical methods. The activity profile of the compound was investigated using several ulcerogenesis models such as indomethacin-, indomethacin plus HCl/EtOH-, cysteamine-, serotonin-, NG-nitro-l-arginine methyl ester plus EtOH-, diethyldithiocarbamate-, N-ethylmaleimide plus EtOH-, water immersion and restraint stress-, pyloric ligation-induced ulcers. In addition, effects of KGG on the biochemical parameters of gastric juice; i.e., inhibition of titratable gastric acidity, acid output, gastric pH, gastric secretion volume and peptic activity were studied. Results: KGG exerted statistically significant gastroprotective activity against indomethacin-, indomethacin plus HCl/EtOH- and N-ethylmaleimide plus EtOH-induced ulcerogenesis. Moreover, KGG demonstrated weak activity against NG-nitro-l-arginine methyl ester plus EtOH, water immersion and immobilization-induced stress, pyloric ligation-induced and diethyldithiocarbamate-induced gastric ulcer models, and also it was ineffective in the prevention of ulcers induced by serotonin and cysteamine. On the other hand, among the gastric biochemical parameters studied, KGG was only found to increase the gastric acid pH from 2.03 to 3.35. Conclusion: Results of this investigation have clearly demonstrated that KGG was found to improve the cytoprotective mechanisms of the gastric mucosa. On the other hand, a weak activity profile was observed on the parameters affecting the gastric acidity (water immersion and restraint-induced-, pyloric ligation-induced-ulcerogenesis and titratable acidity). © 2010 Elsevier Ireland Ltd. SBAG-2564 Türkiye Bilimsel ve Teknolojik AraÅ?tirma Kurumu This study was financially supported by “The Scientific and Technological Research Council of Turkey (TUBITAK)” (project no.: SBAG-2564). The authors would like to express their thanks to Prof. Dr. Sinasi Yildirimli from Hacettepe University, Faculty of Science for authentication of the plant material.
- Published
- 2010
24. Characterization and Biological Activity of Achillea teretifolia Willd. and A. nobilis L. subsp. neilreichii (Kerner) Formanek Essential Oils
- Author
-
Fatih Demirci, Demirci, Betuel, Gurbuz, Ilhan, Yesilada, Erdem, Baser, K. Husnue Can, Anadolu Üniversitesi, Eczacılık Fakültesi, Farmakognozi Anabilim Dalı, Demirci, Fatih, Demirci, Betül, Başer, K. Hüsnü Can, Demirci, F, Demirci, B, Gurbuz, I, Yesilada, E, Baser, KHC, Yeditepe Üniversitesi, Demirci, F., Demirci, B., Gürbüz, I., Yeşilada, E., and Başer, K.H.C.
- Subjects
antimicrobial activity ,Physiology ,antioxidant activity ,Antioxidant Activity ,Cell Biology ,Asteraceae ,Gc And Gc-Ms ,Microbiology ,Antimicrobial Activity ,essential oil ,Essential Oil ,Achillea ,GC and GC-MS ,Genetics ,General Agricultural and Biological Sciences ,Molecular Biology - Abstract
WOS: 000266892000006, The aerial parts of the endemic Achillea teretifolia Willd. and A. nobilis L. subsp. neilreichii (Kerner) Formanek collected from Beysehir were investigated for their essential oil compositions and several biological activities. The essential oils were analyzed both by gas chromatography (CC) and gas chromatography-mass spectrometry (GC-MS). The main components were identified as 1,8-cineole (34%), camphor (11%). terpinen-4-ol (8%), and alpha-thujone (5%) for A. teretifolia essential oil, while fragranyl acetate (32%), fragranol (24%), and beta-eudesmol (8%) for A. nobilis subsp. neilreichii essential oil, respectively. The essential oils were also evaluated for their in vitro antimicrobial activity and their ability to scavenge 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals using microdilution techniques as an index for the evaluation of antioxidant activity. Both essential oils were found to be effective against the tested human pathogenic microorganisms (MIC 0.5 to >2 mg/ml) and DPPH (IC(50) > 0.5 mg/ml) assay as compared to the references.
- Published
- 2009
25. An anti-ulcerogenic flavonol diglucoside from Equisetum palustre L
- Author
-
İlhan Gürbüz, Erdem Yesilada, Shigeru Ito, Gurbuz, I., Yeşilada, Erdem, Ito, S., and Yeditepe Üniversitesi
- Subjects
Male ,Turkey ,Equisetum ,Flavonoid ,Fractionation ,DEPT ,Ulcer index ,Rats, Sprague-Dawley ,Equisetum palustre ,Column chromatography ,Flavonols ,Drug Discovery ,Animals ,Biosassay guided fractionation ,Stomach Ulcer ,Kaempferols ,Pharmacology ,chemistry.chemical_classification ,Peptic ulcer ,Ethanol ,Traditional medicine ,biology ,Plant Extracts ,Chemistry ,fungi ,food and beverages ,Plant Components, Aerial ,Kaempferol diglucoside ,Anti-Ulcer Agents ,biology.organism_classification ,digestive system diseases ,Rats ,Disease Models, Animal ,Gastric Mucosa ,Proton NMR ,Female ,Horsetail ,Misoprostol ,Phytotherapy - Abstract
Ethnopharmacological relevance: The aerial parts of Eqiusetum palustre L. is used to treat peptic ulcer in Karaman, Turkey. Aim of the study: The present study was undertaken to evaluate the in vivo gastroprotective potential and structure elucidation of the active constituent(s) through bioassay-guided fractionation procedures by using ethanol (EtOH)-induced ulcerogenesis model in rats. Material and methods: The 80% ethanol extract of the aerial parts was subjected to subsequent separation procedures such as solvent-solvent partition and column chromatography through bioassay-guided fractionation techniques to isolate the active anti-ulcer component(s) by using the EtOH-induced ulcer model in rats. The ulcer index was used to evaluate and to calculate the gastroprotection percentage. Results: The subextracts, n-butanol and remaining H2O, of Equisetum palustre showed potent in vivo gastroprotective activity. Bioassay-guided fractionation has revealed that a flavonol diglucoside, was isolated as an active constituent from the n-BuOH subextract of Equisetum palustre. Structure elucidation by standard spectroscopic techniques (1H NMR, 13C NMR and DEPT, etc.) revealed that this compound as kaempferol-3-O-1¨-ß-d-glucopyranosyl-3-O-1¨'-ß-d-glucopyranoside, which provided remarkable protection at 250 and 500 mg/kg doses (69.5 and 98.5% ulcer inhibition, respectively) against ethanol-induced gastric lesions. Conclusion: Experimental data confirmed the ethnobotanical usage of Equisetum palustre, with scientific evidence, in Turkey. Additionally, kaempferol-3-O-1¨-ß-d-glucopyranosyl-3-O-1¨'-ß-d-glucopyranoside, a known compound, was defined as an anti-ulcerogenic compound in the present work for the first time. © 2008 Elsevier Ireland Ltd. All rights reserved. SBAG-2564 Türkiye Bilimsel ve Teknolojik AraÅ?tirma Kurumu This study was financially supported by “The Scientific and Technological Research Council of Turkey—TUBITAK” (project no.: SBAG-2564). The authors would like to express their thanks to Prof. Dr. Sinasi Yildirimli from Hacettepe University, Faculty of Science for authentication of the plant material.
- Published
- 2009
26. Evaluation of the anti-ulcerogenic effect of sesquiterpene lactones from Centaurea solstitialis L. ssp. solstitialis by using various in vivo and biochemical techniques
- Author
-
İlhan Gürbüz, Erdem Yesilada, Gürbüz, I., Yeşilada, Erdem, Yeditepe Üniversitesi, Gurbuz, I, and Yesilada, E
- Subjects
Male ,Indomethacin ,Pharmacology ,Pharmacognosy ,Asteraceae ,Sesquiterpene lactone ,Duodenal ulcer ,Rats, Sprague-Dawley ,chemistry.chemical_compound ,Lactones ,Mice ,Oral administration ,Drug Discovery ,Solstitialin A ,Immersion ,Enzyme Inhibitors ,chemistry.chemical_classification ,Behavior, Animal ,NG-Nitroarginine Methyl Ester ,Biochemistry ,13-Acetyl solstitialin A ,Ethylmaleimide ,Female ,Sesquiterpenes ,Centaurea solstitialis ssp. solstitialis ,Serotonin ,Titratable acid ,Centaurea ,Flowers ,In vivo ,mental disorders ,Animals ,Stomach Ulcer ,Ethanol ,Peptic ulcer ,Yellow starthistle ,Dose-Response Relationship, Drug ,Centaurea solstitialis ssp solstitialis ,Chlorojanerin ,Anti-ulcerogenic activity ,Anti-Ulcer Agents ,Phorbols ,Acute toxicity ,Rats ,chemistry ,Cysteamine ,Nitric Oxide Synthase ,Stress, Psychological - Abstract
The guaianolide type sesquiterpene lactones chlorojanerin, 13-acetyl solstitialin A and solstitialin A were identified as the anti-ulcerogenic components of the chloroform extract of the aerial parts of Centaurea solstitialis ssp. solstitialis (Asteraceae). In this study, these compounds were investigated by using various in vivo ulcer models in rats and mice. Chlorojanerin was shown to be significantly effective in preventing the induction of lesions by ethanol- (EtOH-) (both oral and subcutaneous administration), indomethacin-, indomethacin plus HCI/EtOH-, N-G-nitro-L-ar.-inine methyl ester plus EtOH, N-ethylmaleimide plus EtOH-, water immersion and restraint stress, and serotonin, as well as inhibiting fitratable gastric acidity and acid output, and increasing gastric pH, but was ineffective in the prevention of ulcers induced by pyloric ligation, diethyldithiocarbamate, and cysteamine, and had no effect on gastric secretion volume or peptic activity. A mixture of 13-acetyl solstitialin A (95%) and solstitialin A (5%) was found to be significantly effective against EtOH-induced lesions on oral administration but was ineffective when administered subcutaneously. This mixture was also found to be effective in preventing lesions induced by EtOH, indomethacin, indomethacin plus HCl/EtOH, N-G-nitro-L-arginine methyl ester plus EtOH, N-ethylmateimide plus EtOH, water immersion and restraint stress, serotonin and cysteamine, as well as inhibiting fitratable gastric acidity and fitratable acid output, and gastric pH, but was found ineffective against the pyloric ligation-induced and diethyldithiocarbamate-induced ulcerogenesis models, as well as gastric secretion volume and peptic activity. On the other hand, active compounds did not show any toxic effect on acute toxicity (3 days administration) evaluation tests in mice. (c) 2007 Elsevier Ireland Ltd. All rights reserved.
- Published
- 2006
27. Chymotrypsin and Trypsin Inhibitory Activity of Some Medicinal Plants Collected from Rize (Türkiye).
- Author
-
Gunbatan T, Sucu M, Gokbulut A, Dilmac E, and Gurbuz I
- Subjects
- Chymotrypsin, Trypsin, Plant Extracts pharmacology, Chlorogenic Acid, Turkey, Antioxidants pharmacology, Ethanol, Plants, Medicinal
- Abstract
In this research, the evaluation of in vitro chymotrypsin and trypsin inhibitory activities of ten plant species collected from Rize were aimed, and fractions that showed strong activity were analyzed through HPLC. Daphne pontica L. and Mentha longifolia (L.) L. were found to have the highest chymotrypsin inhibitory activities (87.75 and 84.24 % inhibition). Similarly, the highest trypsin inhibitory activity was observed in D. pontica (%99.93 inhibition), followed by Sambucus ebulus L. flowers (87.47 % inhibition). Extracts showing strong enzyme inhibition were fractioned and subjected to activity tests. The highest chymotrypsin inhibitory activity was observed in the n-hexane fraction of D. pontica (%80.70 inhibition), while the highest trypsin inhibitory activity was found in the n-butanol fraction of S. ebulus (%86.81 inhibition). HPLC studies determined that the 80 % ethanol extract of D. pontica and its dichloromethane and ethyl acetate fractions contained umbelliferone. It was found that chlorogenic acid was present in the 80 % ethanol extracts of S. ebulus flowers. M. longifolia was found to contain chlorogenic acid, caffeic acid, luteolin-7-glucoside, and rosmarinic acid. M. longifolia has been identified as the plant exhibiting the highest antioxidant activity in ABTS and CUPRAC tests, consistent with its high phenolic and flavonoid content., (© 2024 Wiley-VHCA AG, Zurich, Switzerland.)
- Published
- 2024
- Full Text
- View/download PDF
28. The five Ferulago species inhibited cell proliferation and induced apoptosis of A549, MCF-7, PC3 and SW480 cancer cells in vitro.
- Author
-
Gurbuz İ, Gunbatan T, Bakar-Ates F, Hoti B, Duman H, and Kilic CS
- Abstract
In this study, it was aimed to evaluate the cytotoxic and apoptotic activities of ethanolic extracts prepared from the roots of 5 Ferulago species [ F. humilis Boiss., F. macrosciadia Boiss. & Balansa, F. sandrasica Peşmen & Quézel, F. silaifolia (Boiss.) Boiss., F. trojana Akalın & Pimenov] on various human cancer cell lines. The cytotoxicity analyses against human lung (A549), breast (MCF-7), prostate (PC3) and colon (SW480) cancer cell lines were determined by MTT test; while the apoptotic effect was evaluated by Annexin V binding assay. All studied extracts showed concentration-dependent cytotoxic activity with an IC
50 value ranging from 0.416 to 5.336 mg/mL. The studied Ferulago species significantly induced apoptosis of cancer cells, while F. macrosciadia had the highest apoptotic activity on MCF-7 cells with 21.79 ± 1.63% apoptotic cell population ( p < 0.0001). In addition, felamedin and prantschimgin content of the extracts, which are common coumarins in Ferulago species, were evaluated by HPLC. According to HPLC analysis, the highest amount of felamedin content was found in F. trojana , while the highest content of prantschimgin was found in F. sandrasica among the studied Ferulago species. This preliminary research has revealed that the studied Ferulago species have promising effects on various cancer cell lines. Further studies are planned to determine the compounds responsible for the effect and underlying mechanism., Competing Interests: Conflict of interestOn behalf of all authors, the corresponding author states that there is no conflict of interest., (© King Abdulaziz City for Science and Technology 2023, Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.)- Published
- 2023
- Full Text
- View/download PDF
29. Lower extremity proprioception and its association with activity and participation in children with unilateral spastic cerebral palsy.
- Author
-
Ipek Erdem F, Gunel MK, and Alemdaroglu-Gurbuz I
- Subjects
- Humans, Child, Child, Preschool, Adolescent, Cross-Sectional Studies, Proprioception, Activities of Daily Living, Lower Extremity, Upper Extremity, Cerebral Palsy complications
- Abstract
Objective: This cross-sectional study aimed to assess lower extremity proprioception and investigate its relationship to activity and participation levels in children with unilateral spastic cerebral palsy (USCP)., Methods: A total of 22 children with USCP between the ages of 5 and 16 years participated in this study. Lower extremity proprioception was evaluated with a protocol that consisted of verbal and location identification, unilateral and contralateral limb matching, and static and dynamic balance tests performed with the impaired and less impaired lower extremities under eyes-open and eyes-closed conditions. Furthermore, the Functional Independence Measure (WeeFIM) and Pediatric Outcomes Data Collection Instrument (PODCI) were used to evaluate the independence levels in daily living activities and participation levels., Results: Children demonstrated proprioceptive loss, as evidenced by an increase in matching errors under the eyes-closed condition compared to the eyes-open condition (p<0.05). Also, the impaired extremity had greater proprioceptive loss than the less impaired extremity (p<0.05). The 5-6-year age group experienced greater proprioceptive deficits than did the 7-11 and 12-16 age groups (p<0.05). Children's lower extremity proprioceptive deficit was moderately associated with their activity and participation levels (p<0.05)., Conclusions: Our findings suggest that treatment programs based on comprehensive assessments, including proprioception, may be more effective in these children., Competing Interests: Declaration of Competing Interest The authors declare there are no competing interests that might be perceived as posing a conflict or bias., (Copyright © 2023 French Society of Pediatrics. Published by Elsevier Masson SAS. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
30. Reliability and validity of the turkish translation of pedsqlTM multidimensional Fatigue scale in Duchenne Muscular Dystrophy.
- Author
-
Alemdaroglu-Gurbuz I, Bulut N, Bozgeyik S, Ulug N, Arslan SS, Yilmaz O, and Karaduman A
- Subjects
- Child, Child, Preschool, Fatigue etiology, Humans, Male, Muscular Dystrophy, Duchenne complications, Parents psychology, Patients psychology, Psychometrics standards, Reproducibility of Results, Translations, Turkey, Cultural Characteristics, Fatigue pathology, Muscular Dystrophy, Duchenne pathology, Surveys and Questionnaires standards
- Abstract
Objective: To perform the Turkish translation, reliability, and validity study of the PedsQLTM-3.0 Multidimensional Fatigue Scale (PedsQL-MFS) in patients with Duchenne Muscular Dystrophy (DMD)., Methods: This prospective, cross-sectional, observational study was held in Hacettepe University, Faculty of Physical Therapy and Rehabilitation between January 2016-August 2018. Turkish translation of the PedsQL-MFS was conducted based on the steps addressed in the translation manual of the original research. The psychometric features of the Turkish version of PedsQL-MFS including feasibility, internal consistency, and test-retest reliability, construct, and criterion-related validity as well as parent/child agreement were investigated on a total of 71 children and their parents., Results: The mean age of boys with DMD included in the study was 102.94+/-23.23 months with a mean 17.15+/-2.98 BMI. Internal consistencies of Child Self Report General Fatigue, Sleep/rest Fatigue, and Cognitive Fatigue items were 0.74, 0.65, and 0.83 while, 0.89, 0.84, and 0.91 in Parent Proxy Report. The ICC values of Child Self Report and Parent Proxy Report were 0.87 and 0.91, respectively. Parent Proxy Report succeded more acceptable fit indices than Child Self Report. A statistically significant correlation was found between PedsQL-MFS and PedsQL-Neuromuscular Module (p<0.05). Moderate agreement was detected between parent and child., Conclusion: The Turkish version of PedsQL-MFS was determined to be a reliable and valid tool to evaluate fatigue in 5-12 years old, ambulant children with DMD.
- Published
- 2019
- Full Text
- View/download PDF
31. Antibacterial, antifungal and enzyme inhibitory effects of selected plants from Turkey.
- Author
-
Gurbuz I, Ozcelik B, Gunbatan T, Akkol EK, Sahinoz M, and Akaydin G
- Abstract
In this study, antibacterial, antifungal, antihyaluronidase, anticollagenase and antielastase activity of Hypericum bithynicum, Malva neglecta, Morus alba, Rubus discolor, Sambucus ebulus and Smilax excelsa were investigated. Methanol extracts of M. neglecta and R. discolor and all extracts of H. bithynicum were more active against Staphylococcus epidermidis. Similarly, water extracts of M. alba and S. ebulus were more active against Streptococcus pneumonia. Additionally, S. ebulus and S. excelsa had prominent antifungal activity on Candida albicans. Besides, methanol extract of M. neglecta and n-hexane extract of H. bithynicum were determined to have significant anti-hyaluronidase activity. Only R. discolor showed significant anti-elastase effect.
- Published
- 2018
32. CCN4/WISP1 (WNT1 inducible signaling pathway protein 1): a focus on its role in cancer.
- Author
-
Gurbuz I and Chiquet-Ehrismann R
- Subjects
- Animals, CCN Intercellular Signaling Proteins chemistry, Gene Expression Regulation, Neoplastic, Humans, Neoplasms diagnosis, Neoplasms pathology, Neoplasms therapy, Prognosis, Proto-Oncogene Proteins chemistry, Signal Transduction, CCN Intercellular Signaling Proteins physiology, Neoplasms genetics, Proto-Oncogene Proteins physiology
- Abstract
The matricellular protein WISP1 is a member of the CCN protein family. It is induced by WNT1 and is a downstream target of β-catenin. WISP1 is expressed during embryonic development, wound healing and tissue repair. Aberrant WISP1 expression is associated with various pathologies including osteoarthritis, fibrosis and cancer. Its role in tumor progression and clinical outcome makes WISP1 an emerging candidate for the detection and treatment of tumors., (Copyright © 2015 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2015
- Full Text
- View/download PDF
33. SAP domain-dependent Mkl1 signaling stimulates proliferation and cell migration by induction of a distinct gene set indicative of poor prognosis in breast cancer patients.
- Author
-
Gurbuz I, Ferralli J, Roloff T, Chiquet-Ehrismann R, and Asparuhova MB
- Subjects
- Breast Neoplasms metabolism, Breast Neoplasms pathology, Cell Line, Tumor, DNA-Binding Proteins metabolism, Disease Progression, Female, Gene Expression Profiling, Humans, Immunoblotting, Oligonucleotide Array Sequence Analysis, Oncogene Proteins, Fusion metabolism, Prognosis, Protein Structure, Tertiary, Reverse Transcriptase Polymerase Chain Reaction, Signal Transduction genetics, Tenascin genetics, Trans-Activators, Biomarkers, Tumor genetics, Breast Neoplasms genetics, Cell Movement genetics, Cell Proliferation, DNA-Binding Proteins genetics, Gene Expression Regulation, Neoplastic genetics, Oncogene Proteins, Fusion genetics
- Abstract
Background: The main cause of death of breast cancer patients is not the primary tumor itself but the metastatic disease. Identifying breast cancer-specific signatures for metastasis and learning more about the nature of the genes involved in the metastatic process would 1) improve our understanding of the mechanisms of cancer progression and 2) reveal new therapeutic targets. Previous studies showed that the transcriptional regulator megakaryoblastic leukemia-1 (Mkl1) induces tenascin-C expression in normal and transformed mammary epithelial cells. Tenascin-C is known to be expressed in metastatic niches, is highly induced in cancer stroma and promotes breast cancer metastasis to the lung., Methods: Using HC11 mammary epithelial cells overexpressing different Mkl1 constructs, we devised a subtractive transcript profiling screen to identify the mechanism by which Mkl1 induces a gene set co-regulated with tenascin-C. We performed computational analysis of the Mkl1 target genes and used cell biological experiments to confirm the effect of these gene products on cell behavior. To analyze whether this gene set is prognostic of accelerated cancer progression in human patients, we used the bioinformatics tool GOBO that allowed us to investigate a large breast tumor data set linked to patient data., Results: We discovered a breast cancer-specific set of genes including tenascin-C, which is regulated by Mkl1 in a SAP domain-dependent, serum response factor-independent manner and is strongly implicated in cell proliferation, cell motility and cancer. Downregulation of this set of transcripts by overexpression of Mkl1 lacking the SAP domain inhibited cell growth and cell migration. Many of these genes are direct Mkl1 targets since their promoter-reporter constructs were induced by Mkl1 in a SAP domain-dependent manner. Transcripts, most strongly reduced in the absence of the SAP domain were mechanoresponsive. Finally, expression of this gene set is associated with high-proliferative poor-outcome classes in human breast cancer and a strongly reduced survival rate for patients independent of tumor grade., Conclusions: This study highlights a crucial role for the transcriptional regulator Mkl1 and its SAP domain during breast cancer progression. We identified a novel gene set that correlates with bad prognosis and thus may help in deciding the rigor of therapy.
- Published
- 2014
- Full Text
- View/download PDF
34. Characterization of volatiles and anti-ulcerogenic effect of Turkish sweetgum balsam (Styrax liquidus).
- Author
-
Gurbuz I, Yesilada E, Demirci B, Sezik E, Demirci F, and Baser KH
- Subjects
- Animals, Anti-Ulcer Agents analysis, Ethanol, Female, Male, Oils, Volatile analysis, Phytotherapy, Plant Extracts analysis, Rats, Rats, Sprague-Dawley, Stomach Ulcer chemically induced, Anti-Ulcer Agents therapeutic use, Oils, Volatile therapeutic use, Plant Extracts therapeutic use, Stomach Ulcer drug therapy, Styrax
- Abstract
Ethnopharmacological Relevance: Sweetgum, Styrax liquidus (Turkish sweetgum) is a resinous exudate obtained from the wounded barks of Liquidambar orientalis Miller tree which belongs to Altingiaceae (Hamamelidaceae). The plant material has been used for the treatment of peptic ulcer symptoms in Turkish folk medicine since centuries. In order to evaluate the claimed activity, we studied the anti-ulcerogenic effect of Styrax liquidus by using an in vivo anti-ulcerogenic activity model and to determine the chemical composition of the balsam., Materials and Methods: Anti-ulcerogenic effects of the balsam "Styrax liquidus" itself and its fractions obtained by successive solvent extractions with chloroform and n-butanol, were investigated against the ethanol-induced peptic ulcer model in rats. The chloroform extract demonstrated a statistically significant gastroprotective effect. In addition, the chemical characterization of the volatiles obtained by microdistillation technique from the balsam and the sub-extracts were analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS), respectively., Results: Pharmacological experiments have clearly demonstrated that 150 and 300mg/kg doses of Styrax liquidus given orally to rats showed significant gastric protection. On GC-MS analysis of the resin, overall, 31 compounds representing 99.8% of the total oil were identified where styrene (81.9%), cinnamyl alcohol (6.9%) and α-pinene (3.5%) were identified as the major components., Conclusion: Present study confirmed the anti-ulcerogenic activity of the local ethnobotanical usage of Styrax liquidus in Turkey., (Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
35. Seroprevalence of varicella-zoster virus in the prevaccine era: a population-based study in Izmir, Turkey.
- Author
-
Kose S, Mandiracioglu A, Senger SS, Ulu Y, Cavdar G, Gol B, Gurbuz I, Sariavci S, and Nohutcu N
- Subjects
- Adolescent, Adult, Age Distribution, Chickenpox immunology, Chickenpox prevention & control, Cross-Sectional Studies, Female, Humans, Immunoglobulin G blood, Male, Risk Factors, Seroepidemiologic Studies, Surveys and Questionnaires, Turkey epidemiology, Young Adult, Antibodies, Viral blood, Chickenpox epidemiology, Herpesvirus 3, Human immunology, Rural Population statistics & numerical data, Urban Population statistics & numerical data
- Abstract
Purpose: To determine the population-based seroprevalence of varicella zoster virus (VZV) and related risk factors in Izmir., Materials and Methods: A population-based household survey was conducted. A representative sample of the population older than 15 years of age was selected using multistage random sampling. A total of 2136 healthy persons participated in this cross-sectional study. The participants completed a questionnaire designed to collect data related to socio-demographic characteristics and risk factors. Blood samples were collected, and VZV-specific IgG was measured using an ELISA., Results: In total, 94.3% of individuals were seropositive for VZV. The difference between VZV seroprevalence in urban and rural populations was significant (OR: 2.6 (95% CI, 1.7-3.8)). No statistically significant differences in seropositivity were observed with respect to other sociodemographic characteristics., Conclusion: A large proportion of the participants were found to be immune to VZV., (Copyright © 2012 King Saud Bin Abdulaziz University for Health Sciences. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
36. The prevalence and risk factors of human papillomavirus in female sex workers.
- Author
-
Ersan G, Kose S, Senger SS, Gunes H, Sehirali S, and Gurbuz I
- Abstract
Objective: Human papillomavirus virus (HPV) is the major causative factor for cervical cancer, and sex workers are at high risk for HPV infection. In this study, we aimed to estimate the prevalence and risk factors of HPV infection among female sex workers (FSWs)., Materials and Methods: The study included 239 brothel-based FSWs who work in Izmir, Turkey. A self-administered questionnaire for risk factors was completed, and cervical brush samples were taken for HPV detection and typing. HPV detection and typing were performed by multiplex polymerase chain reaction (PCR) and reverse hybridization methods. The risk factors related to HPV infection were determined by multivariate analysis., Results: The prevalence of HPV among FSWs was 20.1%. HPV18 was the most common type (40%), followed by HPV16 (17%) and HPV50 (15%). Logistic regression analysis revealed that being less than 30 years of age, having a high frequency of sexual contacts, smoking, and lack of condom use were significantly associated with HPV infection., Conclusion: FSWs have a high prevalence of HPV infection and are at increased risk for cervical cancer. As they are a priority group for active follow-up, national strategies for reducing HPV among FSWs and regular cervical cancer screening programs should be implemented for this population.
- Published
- 2013
- Full Text
- View/download PDF
37. Evaluation of the antiulcerogenic activity profile of a flavonol diglucoside from Equisetum palustre L.
- Author
-
Yesilada E and Gurbuz I
- Subjects
- Animals, Anti-Ulcer Agents isolation & purification, Anti-Ulcer Agents therapeutic use, Drug Evaluation, Preclinical methods, Female, Flavonols isolation & purification, Flavonols therapeutic use, Gastric Mucosa drug effects, Gastric Mucosa pathology, Glucosides isolation & purification, Glucosides therapeutic use, Male, Mice, Plant Components, Aerial, Plant Extracts isolation & purification, Plant Extracts therapeutic use, Rats, Rats, Sprague-Dawley, Stomach Ulcer pathology, Anti-Ulcer Agents pharmacology, Equisetum, Flavonols pharmacology, Glucosides pharmacology, Plant Extracts pharmacology, Stomach Ulcer prevention & control
- Abstract
Ethnopharmacological Relevance: The aerial parts of Equisetum palustre L. are used to treat peptic ulcer disease in Turkey. In a previous study, a flavonol diglucoside i.e., kaempferol 3-O-1''-beta-D-glucopyranosyl-3-O-1'''-beta-D-glucopyranoside (KGG) was isolated as the major antiulcerogenic constituent from the plant., Aim of the Study: The present study was undertaken to evaluate the antiulcer activity profile of KGG using various in vivo experimental ulcer models as well as by assessing gastric biochemical parameters., Material and Methods: KGG was obtained from the ethanol extract of the aerial parts of the plant by successive chromatographical methods. The activity profile of the compound was investigated using several ulcerogenesis models such as indomethacin-, indomethacin plus HCl/EtOH-, cysteamine-, serotonin-, N(G)-nitro-L-arginine methyl ester plus EtOH-, diethyldithiocarbamate-, N-ethylmaleimide plus EtOH-, water immersion and restraint stress-, pyloric ligation-induced ulcers. In addition, effects of KGG on the biochemical parameters of gastric juice; i.e., inhibition of titratable gastric acidity, acid output, gastric pH, gastric secretion volume and peptic activity were studied., Results: KGG exerted statistically significant gastroprotective activity against indomethacin-, indomethacin plus HCl/EtOH- and N-ethylmaleimide plus EtOH-induced ulcerogenesis. Moreover, KGG demonstrated weak activity against N(G)-nitro-L-arginine methyl ester plus EtOH, water immersion and immobilization-induced stress, pyloric ligation-induced and diethyldithiocarbamate-induced gastric ulcer models, and also it was ineffective in the prevention of ulcers induced by serotonin and cysteamine. On the other hand, among the gastric biochemical parameters studied, KGG was only found to increase the gastric acid pH from 2.03 to 3.35., Conclusion: Results of this investigation have clearly demonstrated that KGG was found to improve the cytoprotective mechanisms of the gastric mucosa. On the other hand, a weak activity profile was observed on the parameters affecting the gastric acidity (water immersion and restraint-induced-, pyloric ligation-induced-ulcerogenesis and titratable acidity)., ((c) 2010 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
38. An anti-ulcerogenic flavonol diglucoside from Equisetum palustre L.
- Author
-
Gurbuz I, Yesilada E, and Ito S
- Subjects
- Animals, Disease Models, Animal, Ethanol, Female, Kaempferols chemistry, Kaempferols isolation & purification, Male, Misoprostol therapeutic use, Plant Components, Aerial, Rats, Rats, Sprague-Dawley, Stomach Ulcer chemically induced, Turkey, Anti-Ulcer Agents therapeutic use, Equisetum, Gastric Mucosa drug effects, Kaempferols therapeutic use, Phytotherapy, Plant Extracts therapeutic use, Stomach Ulcer drug therapy
- Abstract
Ethnopharmacological Relevance: The aerial parts of Eqiusetum palustre L. is used to treat peptic ulcer in Karaman, Turkey., Aim of the Study: The present study was undertaken to evaluate the in vivo gastroprotective potential and structure elucidation of the active constituent(s) through bioassay-guided fractionation procedures by using ethanol (EtOH)-induced ulcerogenesis model in rats., Material and Methods: The 80% ethanol extract of the aerial parts was subjected to subsequent separation procedures such as solvent-solvent partition and column chromatography through bioassay-guided fractionation techniques to isolate the active anti-ulcer component(s) by using the EtOH-induced ulcer model in rats. The ulcer index was used to evaluate and to calculate the gastroprotection percentage., Results: The subextracts, n-butanol and remaining H2O, of Equisetum palustre showed potent in vivo gastroprotective activity. Bioassay-guided fractionation has revealed that a flavonol diglucoside, was isolated as an active constituent from the n-BuOH subextract of Equisetum palustre. Structure elucidation by standard spectroscopic techniques (1H NMR, 13C NMR and DEPT, etc.) revealed that this compound as kaempferol-3-O-1''-beta-d-glucopyranosyl-3-O-1'''-beta-D-glucopyranoside, which provided remarkable protection at 250 and 500 mg/kg doses (69.5 and 98.5% ulcer inhibition, respectively) against ethanol-induced gastric lesions., Conclusion: Experimental data confirmed the ethnobotanical usage of Equisetum palustre, with scientific evidence, in Turkey. Additionally, kaempferol-3-O-1''-beta-D-glucopyranosyl-3-O-1'''-beta-D-glucopyranoside, a known compound, was defined as an anti-ulcerogenic compound in the present work for the first time.
- Published
- 2009
- Full Text
- View/download PDF
39. The efficiency of Viscum album ssp. album and Hypericum perforatum on human immune cells in vitro.
- Author
-
Fidan I, Ozkan S, Gurbuz I, Yesilyurt E, Erdal B, Yolbakan S, and Imir T
- Subjects
- Adjuvants, Immunologic isolation & purification, Antigens, CD analysis, Candida albicans drug effects, Cells, Cultured, Epithelial Cells drug effects, Escherichia coli drug effects, Flow Cytometry, Humans, Leukocytes, Mononuclear immunology, Mouth Mucosa immunology, Mouth Mucosa microbiology, Neutrophils immunology, Neutrophils microbiology, Plant Components, Aerial, Plant Extracts pharmacology, Adjuvants, Immunologic pharmacology, Bacterial Adhesion drug effects, Hypericum chemistry, Leukocytes, Mononuclear drug effects, Mouth Mucosa drug effects, Neutrophils drug effects, Phagocytosis drug effects, Viscum album chemistry
- Abstract
Viscum album L. ssp. album and Hypericum perforatum L. are used for the treatment of different diseases. In this study, the effects of these herbals on immune cells were assessed in vitro. The phagocytosis, candidacidal activity of neutrophils and adhesion function of epithelial cells were investigated. Also, the expression of the surface markers of lymphocytes was analyzed by flow cytometry. It was observed that V. album ssp. album increased phagocytic activity and candidacidal activity of neutrophils and decreased adhesion function of epithelial cells. We also observed that in human peripheral blood mononuclear cells stimulated by Viscum album L. ssp. album the levels of CD4(+)CD25(+) and CD8(+)CD25(+) T cells, CD69 expressions in the activated T lymphocytes and CD3(-)CD16(+)CD56(+) NK cells increased compared to the cells that were not stimulated by this herbal. Whereas CD4(+)CD25(+), CD8(+)CD25(+) T cells, CD 69 expression and CD3(-)CD16(+)CD56(+) Natural killer cells did not show any significant differences with the presence of Hypericum perforatum L. compared to the control group. Hypericum perforatum L. increased candidacidal activity of neutrophils and decreased adhesion function of epithelial cells. In the light of these findings, it is considered that these extracts may be used as an adjuvant treatment option for immune activation in immunosuppressed patients.
- Published
- 2008
- Full Text
- View/download PDF
40. Anti-ulcerogenic lignans from Taxus baccata L.
- Author
-
Gurbuz I, Erdemoglu N, Yesilada E, and Sener B
- Subjects
- Animals, Anti-Ulcer Agents pharmacology, Chromatography, Gel, Disease Models, Animal, Ethanol, Female, Lignans pharmacology, Male, Plant Extracts isolation & purification, Plant Extracts pharmacology, Rats, Rats, Sprague-Dawley, Stomach Ulcer chemically induced, Turkey, Wood, Anti-Ulcer Agents isolation & purification, Lignans isolation & purification, Stomach Ulcer prevention & control, Taxus chemistry
- Abstract
Four lignan type compounds, lariciresinol, taxiresinol, isolariciresinol and 3-demethyl-iso-lariciresinol, were isolated from the heartwood of Taxus baccata L. (Taxaceae) growing in Turkey through chromatographic techniques. In vivo anti-ulcerogenic potency of these compounds was investigated on ethanol-induced ulcerogenesis model in rats at two different doses, 50 and 100 mg/kg. All compounds were shown to possess significant anti-ulcerogenic activity at both doses. However, the effect of taxiresinol was the most prominent.
- Published
- 2004
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.