Browsing by Author "Akkoyun, Mahire Bayramoglu"

Now showing 1 - 12 of 12

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.
Behavior, Antioxidant, and Metabolomics Effects of Allium Tuncelianum
(Wiley, 2024) Abbak, Nigar; Nemutlu, Emirhan; Recber, Tuba; Gul, Asli San Dagli; Akkoyun, H. Turan; Akkoyun, Mahire Bayramoglu; Arihan, Okan
Allium species are consumed extensively as folkloric medicine and dietary elements, but limited studies have been conducted on them. In this study, the effects of an ethanol-water extract obtained from the underground bulb of Allium tuncelianum (Kollmann) ozhatay, B. Mathew & Siraneci (AT) on the behavioral, antioxidant, and metabolite parameters in rats were evaluated. AT was administered orally once a day at doses of 100 and 400 mg/kg to male Wistar albino rats for 10 consecutive days. The elevated plus maze, rotarod, and hotplate tests were used to examine anxiety-like behaviors, locomotor activities, and pain perception in the rats, respectively. Additionally, untargeted metabolomic analyses were performed on plasma samples and AT extracts using two orthogonal analytical platforms. The phenolic components, mainly fumaric acid, malic acid, vanillic acid, quercetin-3-arabinoside, hydrocinnamic acid, and gallocatechin, were determined in the extract. In addition, arbutin, salicylic acid, trehalose, and nicotinic acid were analyzed in the extract for the first time. The AT extract did not decrease the catalase, glutathione peroxidase, or superoxide dismutase levels; however, diazepam decreased some of those parameters significantly in the brain, liver, and kidney. Although both the AT and diazepam treatments resulted in an increase in anxiolytic-like effects compared to the control group, no significant differences were observed (p > .05). In the metabolomic analysis, significant changes were observed in the rats treated with AT and diazepam, and they caused significant changes in some metabolic pathways, including amino acid and fatty acid metabolism, compared to the control.
Comparison of Xanthine Oxidase Inhibitory Activities and Phenolic, Fatty Acid, Element, and Vitamin Levels of Four Mushroom Species
(Wiley, 2025) Ekin, Suat; Akkoyun, Mahire Bayramoglu; Bakir, Ahmet; Akcay, Mustafa Emre; Ekin, Emre Can
The purpose of this study was to determine the antioxidant properties and the composition of phenolic compounds, trace elements, vitamins, and fatty acids in the edible mushrooms Helvella leucopus, Tricholoma terreum, Lepista nuda, and Marasmius oreades, as well as their inhibitory effect on xanthine oxidase. Elemental analyses were conducted using ICP-OES. Phenolic compounds and vitamins were performed by HPLC, while identification of fatty acids was performed by GC-MS. HPLC analysis revealed the phenolic compounds in H. leucopus, T. terreum, L. nuda, and M. oreades, with gallic acid being the main compound identified, with levels of 133.04, 246.49, 408.64, and 129.302 mu g/g dry weight, respectively. For vitamins, alpha-tocopherol is the most primary vitamin found with values of 0.6009, 0.79, and 0.3581 mu mol/kg dw. GC-MS analysis determined that the fatty acids with linoleic acid are the major fatty acids identified, with percentages of 30.82%, 19.92%, 30.38%, and 20.86%. ICP-OES measurement indicated that trace elements with iron as the dominant trace element were observed, with concentrations of 0.248, 0.237, 0.449, and 0.1998 mmol/kg dw. The XO inhibitory activities of four mushrooms were assayed, with the IC50 values of 39.97, 20.71, 11.71, and 23.85 mu g/mL, respectively. L. nuda and T. terreum may be effective for hyperuricemia and gout, which is associated with the results of phenolic compounds, some vitamins, trace elements, and linoleic acid contents on the inhibitory activities against xanthine oxidase. The results of medicinal mushrooms have shown that they could potentially be useful as inhibitors for the prevention of XO-related diseases induced by ROS.
Determination of Trace Element and Fatty Acid Levels in Tissues of Mirror and Scaly Carp (Cyprinus Carpio L., 1758) Living in Keban Dam Reservoir (Elazig)
(Wiley, 2022) Aydin, Sevinc; Akkoyun, H. Turan; Akkoyun, Mahire Bayramoglu; Bengu, Aydin S.; Ekin, Suat; Harlioglu, Ayse G.
This study investigated the concentrations of some accumulated trace metals (iron, manganese, zinc and copper) and fatty acids in liver and muscle tissues of mirror and scaly carp varieties (Cyprinus carpio L., 1758) living in Keban Dam Reservoir (Elazig), which is the second-largest artificial lake in Turkey that hosts commercially valuable and preferred fish varieties for human consumption. The inductively coupled plasma mass spectrometry (ICP-MS) method was used to analyse the concentrations of trace elements. Fatty acid levels were measured in a gas chromatography mass spectrometry (GC-MS) device, using a flame ionization detector (FID). Considering the two fish varieties and tissues that were studied, the mean metal concentrations (mu g g(-1)) were found in the following ranges: Fe 12.32-49.97, Mn 0.12-0.62, Zn 10.45-86.59 and Cu 2.74-11.86. Although the lowest levels were detected in the muscle tissue for all the metals examined, the levels in the liver tissue were significantly higher. According to the results of the analyses on fatty acid concentrations, the mean total saturated fatty acid levels in the muscle tissue of the scaly carp and mirror carp varieties were found to be 31.07 and 31.43 (%), respectively, whereas these values for the liver tissue were consecutively 22.36 and 22.08 (%). Successively, the mean total levels of unsaturated fatty acids were determined as 68.93 and 68.40 (%) in the muscle tissue and 77.64 and 77.92 in the liver tissue. This study, with the finding that the trace (metallic) element accumulation rates were below the upper limits of the tolerable range, and the examined fish varieties were rich in fatty acids, shows that mirror carp and scaly carp living in Keban Dam Reservoir are highly nutritious for human diets.
The Effect of Astaxanthin and Cadmium on Rat Erythrocyte G6pd, 6pgd, Gr, and Trxr Enzymes Activities in Vivo and on Rat Erythrocyte 6pgd Enzyme Activity in Vitro
(Wiley, 2018) Akkoyun, Mahire Bayramoglu; Bengu, A. Sukru; Temel, Yusuf; Akkoyun, H. Turan; Ekin, Suat; Ciftci, Mehmet
In this study, the effects of astaxanthin (AST) that belongs to carotenoid family and cadmium (Cd), which is an important heavy metal, on rat erythrocyte G6PD, 6PGD, GR, and TrxR enzyme activities in vivo and on rat erythrocyte 6PGD enzyme activity in vitro were studied. In in vitro studies, 6PGD enzyme was purified from rat erythrocytes with 2',5'-ADP Sepharose4B affinity chromatography. Results showed inhibition of enzyme by Cd at IC50; 346.5 mu M value and increase of 6PGD enzyme activity by AST. In vivo studies showed an increase in G6PD, 6PGD. and GR enzyme activities (P > 0.05) and no chance in TrxR enzyme activity by AST. Cd ion inhibited GbPD, 6PGD, and GR enzyme activities (P < 0.05) and also decreased TrxR enzyme activity (P > 0.05). AST + Cd group G6PD enzyme activity was statistically low compared with control group (P < 0.05). 6PGD and TrxR enzyme activities decreased without statistical significance (P > 0.05); however, GR enzyme activity increased statistically significantly (P < 0.05).
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.
Evaluation of the Effect of Allium Tuncelianum (Tunceli Mountain Garlic) Plant Extract on Behavioral, Antioxidant and Metabolomic Parameters in Rats
(Wiley, 2025) Abbak, Nigar; Nemutlu, Emirhan; Recber, Tuba; Gul, Asli San Dagli; Akkoyun, Hurrem Turan; Akkoyun, Mahire Bayramoglu; Arihan, Okan
Nephroprotective Effect of Ferulago Angulata Flowers on N-Nitrosodimethylamine Nephrotoxicity in Rats and Its Phytochemical Profile
(Wiley, 2019) Ekin, Suat; Kiziltas, Hatice; Akkoyun, Mahire Bayramoglu; Ekin, Hasya Nazli; Yildirim, Serkan; Oto, Gokhan; Ozgokce, Fevzi
The present study was designed to assess the phytochemical content of Ferulago angulata (FA) and possible in vivo nephroprotective effect of FA administration on trace elements, minerals, MDA and GSH in kidney and liver tissue samples, serum vitamin (alpha-tocopherol, retinol, cholecalciferol, phylloquinone), TSA, and LSA in a rat model of DMN-induced nephrotoxicity. In the study, Wistar albino rats were assigned to six groups: Control (0.9% NaCl), (DMN 10 mg/kg), (FA 150 mg/kg), (DMN + FA 150 mg/kg), (FA 300 mg/kg), and (DMN + FA 300 mg/kg). Rats were intraperitoneally given DMN for the first 7 days. Renal injury caused by DMN was proved by the histopathological alterations. The FA (300 mg/kg) treatment significantly normalized Se, Cr, Ca levels in liver and Co level in kidney tissue samples. These observed positive effects are due to the phytochemical content of the plant. The flower extract of FA (300 mg/kg) can be used for the prevention of kidney damage. Practical applications Ferulago angulata flowers are used in traditional medicine for treat kidney and liver digestive system diseases. This species is endemic taxa of the family Apiaceae, which has been used both as food and therapeutics because of their phytochemical composition. In this study, the phenolic characterization of FA flower was used to a new RP-HPLC method, as well as the biological activity of FA flower and possible in vivo nephroprotective effect of FA flowers on trace elements, minerals, MDA and GSH in kidney and liver tissue samples and vitamins, TSA, and LSA in serum samples a rat model of DMN-induced nephrotoxicity. It was found that high level of phenolic compounds (chlorogenic acid, vanillic acid, 2-hydroxycinnamic acid) present in the flower extract of F. angulata has positive effects and antioxidant properties. Due to its phenolic content, FA flower extract could protect for kidney damage and can be used as antioxidants in the food additive and pharmaceutical industry.
Phenolic Contents, Enzyme Inhibitory Activities, and Protective Effect of Aqueous Extract of Rosa Pisiformis Fruits
(Springer, 2024) Ekin, Suat; Akkoyun, Mahire Bayramoglu; Kiziltas, Hatice; Gok, Hasya Nazli; Oto, Gokhan; Akkoyun, Turan; Orhan, Didem Deliorman
The present study was designed to assess the phytochemical contents as well as the in vitro biological activities fruit of Rosa pisiformis and possible in vivo cardioprotective and hepatoprotective properties of the aqueous extract of R. pisiformis fruit on trace elements (cadmium, selenium, nickel, zinc, iron, copper, cobalt, chromium, manganese, lead), minerals (sodium, calcium, potassium, magnesium), glutathione and malondialdehyde in heart and liver tissue samples, serum vitamin (retinol, cholecalciferol, phylloquinone, alpha-tocopherol), total sialic acid, and lipid-bound sialic acid in a rat model of isoproterenol-induced oxidative damage. In the study, 40 Wistar albino rats were divided into four groups of ten each: control, isoproterenol 100 mg/kg bodyweight; isoproterenol 100 mg/kg bodyweight; then R. pisiformis 300 mg/kg bodyweight, and R. pisiformis 300 mg/kg bodyweight. Rats were given isoproterenol twice at an interval of 24 h for two days (on days 28 and 29) subcutaneously. The experimental period was maintained at 30 days. According to analysis results, caffeic acid and p-coumaric acid were found to be the high contents of the fruit extracts at 6.01 +/- 0.0006 and 3.93 +/- 0.007 mg/100 g dry weight. It showed that R. pisiformis (300 mg/kg bodyweight) aqueous extract had a potent action on oxidative damage. The R. pisiformis (300 mg/kg bodyweight) treatment significantly alleviated toward normalcy on the zinc, manganese, cobalt, magnesium, and sodium values in the heart, and zinc and magnesium values in liver tissue samples. These positive effects may be related to the action of p-coumaric acid and caffeic acid present in the R. pisiformis 300 mg/kg and it has hypolipidemic and antioxidant properties that could protect from myocardial damage.
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.
Theophylline Attenuates Bleomycin-Induced Oxidative Stress in Rats: the Role of Il-6, Nf-Kb, and Antioxidant Enzymes
(Univ Sao Paulo, Conjunto Quimicas, 2022) Ekin, Suat; Yildirim, Serkan; Akkoyun, Mahire Bayramoglu; Gok, Hasya Nazli; Arihan, Okan; Oto, Gokhan; Aslan, Sinem
The purpose of this study was to evaluate the antifibrotic and antioxidant roles of theophylline (Theo), a bioactive compound, in bleomycin (BLM)-induced pulmonary fibrosis in Wistar albino rats. Assigned into 4 groups were 32 Wistar albino rats, comprising the control group (administered 0.9% isotonic saline), BLM group (treated with BLM at a dose of 2.5 mg/kg), BLM+Theo group (treated with Theo at a dose of 75 mg/kg + BLM at a dose of 2.5 mg/kg), and Theo group (treated with Theo at a dose of 75 mg/kg). In the BLM group, a significant decrease was observed in the catalase and glutathione peroxidase enzyme activities, and reduced glutathione (GSH) (p < 0.05, p < 0.05, p < 0.001, respectively), while the malondialdehyde (MDA) levels (p < 0.001) were significantly elevated when compared to the control group. However, the MDA levels in the BLM+Theo group were also significantly higher than in the control group (p < 0.01). Similarly, the GSH levels were significantly higher in the BLM+Theo group than in the BLM group (p < 0.05). The results indicated that Theo reduced the BLM-induced activation of nuclear factor-kappaB (NF-kappa B) and decreased interleukin-6 (IL-6) levels, together with significant amelioration of the immunohistochemical and histopathological architecture in the lung tissues. It was concluded that the administration of Theo had a positive effect on the GSH level, and activation of NF-kappa B and IL-6 expression, which were significant proinflammatory markers in the BLM-treated rats.