Browsing by Author "Bengu, Aydin Sukru"

Now showing 1 - 11 of 11

Assessment of the Effect of Sodium Tetraborate on Oxidative Stress, Inflammation, and Apoptosis in Lead-Induced Nephrotoxicity
(Taylor & Francis Ltd, 2025) Yaman, Turan; Akkoyun, H. Turan; Akkoyun, Mahire Bayramoglu; Karagozoglu, Fatma; Melek, Sule; Keles, Omer Faruk; Bengu, Aydin Sukru
Exposure to Pb, a toxic heavy metal, is a risk factor for renal damage. Borax, an essential trace element in cellular metabolism, is a naturally occurring compound found in many foods. This study investigated the effects of sodium tetraborate (ST), a source of borax, on renal oxidative stress and inflammation in rats exposed to Pb. Wistar Albino rats (n = 24) were divided into four groups: Control (0.5 mL, i.p. isotonic), Pb (50 mg/kg/day/i.p.), ST (4.0 mg/kg/day/oral), and Pb + ST groups. At the end of the five-day experimental period, kidney tissue samples were obtained and analyzed. Histopathologically, the Pb-induced damage observed in the Pb group improved in the Pb + ST group. Immunohistochemically, Pb administration increased the expression of inducible nitric oxide synthase, cyclooxygenase-2, and caspase-3. When evaluated biochemically, Pb application inhibited catalase and glutathione peroxidase (GSH-Px) enzyme activities and activated superoxide dismutase enzyme activity. An increase in malondialdehyde levels was considered an indicator of damage. ST application increases glutathione peroxidase enzyme activity and decreased malondialdehyde levels. These results indicate that ST might play a protective role against Pb-induced renal damage via the upregulation of renal tissue antioxidants and cyclooxygenase-2, inducible nitric oxide synthase, and caspase-3 immunoexpression.
Bio-Oil Production Via Catalytic Pyrolysis of Anchusa Azurea: Effects of Operating Conditions on Product Yields and Chromatographic Characterization
(Elsevier Sci Ltd, 2016) Aysu, Tevfik; Durak, Halil; Guner, Serkan; Bengu, Aydin Sukru; Esim, Nevzat
Pyrolysis of Anchusa azurea, a lignocellulosic gramineous plant, was carried out in a tubular, fixed-bed reactor in the presence of four catalysts (Ca(OH)(2), Na2CO3, ZnCl2, Al2O3). The influences of pyrolysis parameters such as catalyst and temperature on the yields of products were studied. It was found that higher temperature resulted in lower liquid (bio-oil) and solid (bio-char) yields and higher gas yields. Catalysts effected the yields of products differently and the composition of bio-oils. Liquid yields were increased in the presence of Na2CO3, ZnCl2 and Al2O3 and decreased with Ca(OH)(2). The highest bio-oil yield (34.05%) by weight including aqueous phase was produced with Na2CO3 catalyst at 450 degrees C. The yields of products (bio-char, bio-oil and gas) and the compositions of the resulting bio-oils were determined by GC-MS, FT-IR and elemental analysis. GC-MS identified 124 and 164 different compounds in the bio-oils obtained at 350 and 550 degrees C respectively. (C) 2016 Elsevier Ltd. All rights reserved.
Effects of Arbutin on Fatty Acid Levels of Erythrocyte and Serum in Wistar Albino Rats Treated With Potassium Bromate
(Assoc Pharmaceutical Teachers india, 2022) Akkoyun, H. Turan; Aydin, Sevinc; Akkoyun, Mahire Bayramoglu; Bengu, Aydin Sukru; Ekin, Suat; Erdem, Sinem Aslan
Background: In the presented study; the Effects of Arbutin (ARB) on the Rat Erythrocyte and serum fatty acid profile which is exposed to potassium bromate (KBrO3) were investigated. Materials and Methods: In this study, 32 Wistar albino rats weighing 250-300 g were used divided into 4 groups. Groups 1: control, group 2: KBrO3 (single dose 100 mg / kg gavage), group 3: ARB (50 mg / kg / day (ip) for 5 days), group 4: KBrO3 + ARB. At the end of the 5(th) day, alteration of fatty acid profile in erythrocyte and serum of rats in all groups was examined. Results: Rat serum essential fatty acid; palmitic acid (C16:0), myristic acid (C14:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), erythrocyte major fatty acids; palmitic acid (C16:0), myristic acid (C14:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), arachidic acid (C20:0), eicosenoic acid (C20:1), and lignoceric acid (C24:0). In addition, in our studied serum and erythrocytes; Total monounsaturated fatty acids (MUFA) varied between 8.91 +/- 0.53- 11.71 +/- 2.55 and 33.71 +/- 2.12- 37.11 +/- 2.12, respectively. It was determined that total polyunsaturated fatty acids (PUFA) varied between 5.90 +/- 1.29- 9.96 +/- 1.18 and 14.72 +/- 3.66- 22.13 +/- 4.82, respectively. Conclusion: In our study, alterations in fatty acid contents were observed, and results suggesting that arbutine affects the enzymes involved in Fatty acid metabolism and has an effect on fatty acid amounts.
Effects of Morning and Nocturnal Soccer Matches on Levels of Some Trace Elements in Young Trained Males
(C M B Assoc, 2019) Algul, Sermin; Bengu, Aydin Sukru; Baltaci, Saltuk Bugra; Ozcelik, Oguz
The aim of this study was to comparatively evaluate effect of morning and nocturnal soccer matches induced metabolic stress on plasma levels of iron (Fe), copper (Cu) and zinc (Zn). Twenty male footballers performed two soccer matches in morning and at night on different days. Blood samples were taken before and tiller match. The levels of Fe, Zn and Cu were measured through an atomic absorption spectrophotometry. Metabolic stress was evaluated by altered malondialdehyde (MDA) levels that measured using High Performance Liquid Chromatography. In morning and at nocturnal soccer matches, levels of MDA (36% and 27%), Fe (37.4% and 38.9%) and Cu (34.8% and 26.8%) were all increased in all subjects, respectively. However, Zn level decreased -4.5 % in morning (n=10 subjects) and -9.4% at nocturnal (n=12 subjects) soccer matches. In addition, Cu/Zn ratio increased significantly 46.6% in morning and 36.6% at nocturnal soccer matches. Soccer match has significant effects on levels of MDA, Fe and Cu but not Zn levels. The results of this study showed that morning soccer match significantly alters levels of MDA and Cu and Cu/Zn ratio compared to nocturnal soccer match.
Evaluation of Eremurus Spectabilis for Production of Bio-Oils With Supercritical Solvents
(Elsevier Science Bv, 2015) Aysu, Tevfik; Demirbas, Ayhan; Bengu, Aydin Sukru; Kucuk, Mehmet Masuk
Eremurus spectabilis samples were liquefied in organic solvents (methanol, ethanol and acetone) with (sodium hydroxide and ferric chloride) and without catalyst in a cylindrical reactor at temperatures of 270, 290 and 310 degrees C under supercritical conditions. The effects of liquefaction parameters such as temperature, catalyst and solvent on product yields were investigated. The liquid products were extracted with diethyl ether and benzene using an extraction procedure. The product yields in supercritical methanol, ethanol and acetone were found to as 41.6%, 53.8% and 64.3% in the non-catalytic runs at 310 degrees C, respectively. The highest conversion was obtained in supercritical acetone in the presence of ferric chloride (10%) at same temperature in the catalytic runs. The produced liquids in acetone were analyzed and characterized by elemental, Fourier transform infrared spectroscopy (FT-IR), gas chromatography-mass spectrometry (GC-MS). The liquid products (bio-oils) obtained with acetone contained various types of components including aromatics, nitrogenated and oxygenated compounds. As the bio-oils obtained exhibit high heat values, E. spectabilis is presented as a potential feedstock candidate for production of bio-fuels or valuable chemicals. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Health Attributes of an Endemic Orchid From Eastern Anatolia, Dactylorhiza Chuhensis Renz&taub. - in Vitro Investigations
(Elsevier Gmbh, 2015) Dalar, Abdullah; Guo, Yu; Esim, Nevzat; Bengu, Aydin Sukru; Konczak, Izabela
Phytochemical composition and potential health attributes of Dactylorhiza chuhensis Renz&Taub., an endemic orchid from Eastern Anatolia, were investigated. Lyophilized methanol-based extracts obtained from leaf, flower, stem and tuber were investigated for the presence of phenolic compounds [Folin-Ciocalteu assay and high performance liquid chromatography analysis (HPLC)], antioxidant capacities [ferric reducing antioxidant power (FRAP) and oxygen radical absorbance capacity (ORAC) assay] and enzyme-inhibitory activities [lipase, alpha-amylase, alpha-glucosidase and angiotensin converting enzyme (ACE)]. The tuber, used as a traditional remedy and utilized by the pharmaceutical industry, had the lowest content of total phenolics, inferior antioxidant and enzyme-inhibitory activities. The highest phenolic content (44.9 +/- 0.8 mg GAE/g DW) was exhibited by the leaf extract, which also showed superior reducing (736.8 +/- 16.2 mu mol Fe2+/g DW) and oxygen radical scavenging capacities (2715.8 +/- 83.5 mu mol Trolox E/g DW). The inhibitory activities of the leaf extract toward alpha-amylase, alpha-glucosidase and ACE were moderate. Applied at non-toxic concentrations, the leaf extract effectively reduced accumulation of nitric oxide (NO) in lipopolysaccharide (LPS)-activated hepatocellular carcinoma (HepG2) cells. Further studies towards potential utilization of D. chuhensis leaf as a source of physiologically active phytochemcials are justified. Crown Copyright (C) 2015 Published by Elsevier GmbH. All rights reserved.
The Protective Effect of Arbutin Against Potassium Bromate-Induced Oxidative Damage in the Rat Brain
(Wiley, 2023) Akkoyun, H. Turan; Uyar, Ahmet; Akkoyun, Mahire Bayramoglu; Bengu, Aydin Sukru; Melek, Sule; Karagozoglu, Fatma; Erdem, Sinem Aslan
This study aimed to investigate the protective effects of arbutin (ARB) against brain injury induced in rats with potassium bromate (KBrO3). The rats were divided into four groups as Group 1: Control (0.9% NaCl ml/kg/day p.), Group 2: KBrO3 (100 mg/kg (gavage), Group 3: ARB (50 mg/kg/day p.), and Group 4: KBrO3 + ARB (100 mg/kg (gavage) + 50 mg/kg/day p.). At the end of the fifth day of the study, the rats in all groups were killed, and their brain tissues were collected. In the collected brain tissues, malondialdehyde (MDA), superoxide dismutase (SOD), and catalase (CAT) levels were measured, and routine histopathological examinations were made. The MDA levels in the group that was exposed to KBrO3 were significantly higher than those in the control group (p < 0.001). In comparison to the KBrO3 group, the MDA levels in the KBrO3 + ARB group were significantly lower (p < 0.001). It was observed that SOD and CAT enzyme activity levels were significantly lower in the KBrO3 group compared to the control group (p < 0.001), while these levels were significantly higher in the KBrO3 + ARB group than in the KBrO3 group (p < 0.001). Additionally, the group that was subjected to KBrO3 toxicity, as well as ARB administration, had much lower levels of histopathologic signs than the group that was subjected to KBrO3 toxicity only. Consequently, it was found that KBrO3 exposure led to injury in the brain tissues of the rats, and using ARB was effective in preventing this injury.
Protective Effect of Astaxanthin Against Aluminum Induced Liver Oxidative Damage
(Parlar Scientific Publications (p S P), 2017) Akkoyun, H. Turan; Bengu, Aydin Sukru; Akkoyun, Mahire Bayramoglu; Ulucan, Aykut; Arihan, Okan
In this study, protective effect of a potent antioxidant astaxanthine on preventing rat liver damage due to Al exposure was evaluated. In experimental design, 20 Wistar-albino rats were divided into four groups as Control, Aluminum (20 mg/kg/day i.p), Al + Astaxanthine (5 mg/kg/day AST orally, Al 20 mg/kg/day i.p) and AST (5 mg/kg/day). Study was conducted for 14 days. GSH was found significantly low in Al group compared to control and significantly high in AST and AST + Al administered groups compared to Al group(p<0.01). When MDA levels were investigated, an increase in Al administered group compared to control (p<0.01) and a decrease in Al + AST group compared to Al administered group (p<0.001) was found. In CAT enzyme activity level, a significant decrease in Al, AST and Al + AST administered groups compared to control (p<0.001), an increase in AST, Al + AST groups compared to Al administered group (p<0.001) and also an increase in CAT enzyme activity level in AST+Al administered group compared to AST group (p<0.001) was determined. Due to alterations in MDA and GSH levels and CAT enzyme activity in rat liver tissue as well as positive effects of AST in liver tissue histopathological assessments, it was concluded that AST has a protective role against such toxic molecules.
Protective Effect of Ellagic Acid Against Carbon Tetrachloride (Ccl4) - Induced Oxidative Brain Injury in Rats
(Parlar Scientific Publications (p S P), 2018) Akkoyun, H. Turan; Bengu, Aydin Sukru; Ulucan, Aykut; Bayramoglu-Akkoyun, Mahire; Arihan, Okan
In this study, it was aimed to investigate protective effects of Ellagic acid in rats which have brain damage formed with carbon tetrachloride (CCl4). 28 male Wistar albino rats were separated into 4 groups as Control, CCl4., Ellagic acid and CCl4+ Ellagic acid. From the brain tissue homogenate malondialdehyde (MDA), glutathione (GSH), superoxide dismutase (SOD), gluthation peroxidase (GSH-Px), catalase (CAT) levels were measured and routine histopathological investigation was performed. An increase in MDA level (p<0.01) whereas a decrease in CAT, GSH-Px, SOD (p<0.01) and GSH (p<0.05) levels in CCl4 administered group compared to control was observed. In our study, in the control and Ellagic acid administered groups, no microscopic findings were observed in the brain, while severe lesions were seen in the CCl4 administered group and only mild congestion lesions were seen in the CCl4 + Ellagic acid group. Results of this study suggest a protection by ellagic acid against CCl4 induced brain damage. This protection is possibly via induction of antioxidant protective mechanism which is shown both by biochemical and histopathological methods.
Response of Some Trace Elements To Soccer Match Performed Different Times of Day in Young Sedentary Male
(Mattioli 1885, 2022) Algul, Sermin; Baltaci, Saltuk Bugra; Bengu, Aydin Sukru; Ozcelik, Oguz
Objective: We aimed to examine effects of soccer match induced metabolic stress on levels of some trace elements. Materials and Methods: Fourteen sedentary male subjects randomly performed three indoor soccer matches (2 x 30 minute) in morning, afternoon and at night on different days. Venous blood samples were taken before and after match. Plasma malondialdehyde levels measured by High Performance Liquid Chromatography. Total antioxidant capacity and total oxidant capacity were estimated using a commercially available enzyme-linked immunosorbent assay kit. Plasma iron, copper and zinc levels was measured using an Atomic Absorption Spectrophotometer. Results: Significant increases were found in iron, malondialdehyde and total oxidant capacity in all matches (p<0.0001). Zinc decreased (p<0.0001) in morning but increases at night soccer a match (p<0.0001) which is opposite to copper. Conclusions:There was no significant correlation between increased stress parameters and trace element levels. However, time of soccer match causes opposite influence on levels of zinc and copper.
Screening in Vivo Antioxidant and Haematological Properties of Sumac and Acorn Bioactive Rich Extracts
(Elsevier Science Bv, 2018) Dalar, Abdullah; Dogan, Abdulahad; Bengu, Aydin Sukru; Mukemre, Muzaffer; Celik, Ismail
Sumac (Rhos coriaria L.) and acorn (Quercus brantii Lindl.) are plant species widely used in the Mediterranean countries for various industrial, therapeutic and nutritional purposes. This study aimed to investigate the phytochemical composition (phenolics, volatiles, fatty acids, and minerals) and effects of the extracts obtained from sumac and acorn on antioxidant mechanisms in various tissues (lung, spleen, hearth, and muscle) and several haematological parameters. Bioactive rich extracts containing phenolics (gallic acid and methyl gallate), volatiles (beta-pinene, octanal, limonene, nonanal, beta-caryophyllene, and humulene), fatty acids (oleic, palmitic, and linoleic acids) and mineral compounds (K, Mg, Ca, Si, Na, and B) regulated the levels of lipid peroxidation and antioxidant defence systems, and haematological parameters effectively.