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Öğe Combination of fetuin and trehalose in presence of low glycerol has beneficial effects on freeze-thawed ram spermatozoa(Wiley, 2021) Bucak, Mustafa Numan; Akalin, Pinar Peker; Keskin, Nazan; Bodu, Mustafa; Ozturk, Ali Erdem; Ili, Pinar; Ozkan, HuseyinBackground: Freeze-thawing process negatively affects ram spermatozoa in terms of sperm quality, DNA integrity and antioxidant defence system. Thus, antioxidant supplementation of spermatozoa during freeze-thawing is suggested to improve sperm parameters. Objectives: The aim of this study was to determine the effects of fetuin and trehalose added into ram semen extender on sperm parameters, antioxidant parameters, antioxidant-related gene expressions and DNA integrity during the freeze-thawing process, in low glycerol concentration. Methods: Semen samples collected from six mature rams were pooled and splitted into equal aliquots and diluted with a tris-based extender containing different concentrations of glycerol (G5; %5 and G3; %3), fetuin (F; 2.5, 5 and 15 mg/mL) and trehalose (60 mm) as eight groups (G5F0, G5F2.5, G5F5, G5F15, G3F0, G3F2.5, G3F5 and G3F15). Results: G3F5 group resulted in the highest motility, mitochondrial activity and viability and the lowest DNA fragmentation and DNA damage (p < 0.05). Also, G3F0 displayed considerably more cryoprotective effect compared with G5F0 group (p < 0.05) in terms of motility, mitochondrial activity and viability rates. Lipid peroxidation levels decreased in G5F5 group compared with G5F0 group (p < 0.05). The levels of total glutathione increased in G3F2.5 group (p < 0.05) in comparison with the G5F0 group. NQO1 gene levels were upregulated approximately twofold in G5F5, G5F15, G3F2.5, G3F5 and G3F15 groups compared with G5F0 group (p < 0.05). The levels of GCLC gene were approximately twofold higher in G3F0, G3F2.5, G3F5 and G3F15 groups compared with G5F0 group (p < 0.05). GSTP1 gene levels were significantly higher with different levels in all treatment groups except for G5F2.5 and G3F0 groups in comparison with G5F0 group (p < 0.05). Conclusions: Co-supplementation of tris-based extender having low glycerol (3%) with trehalose and fetuin to enhance the quality of ram spermatozoa after freeze-thawing process is recommended.Öğe Decreasing glycerol content by co-supplementation of trehalose and taxifolin hydrate in ram semen extender: Microscopic, oxidative stress, and gene expression analyses(Academic Press Inc Elsevier Science, 2020) Bucak, Mustafa Numan; Keskin, Nazan; Ili, Pinar; Bodu, Mustafa; Akalin, Pinar Peker; Ozturk, Ali Erdem; Ozkan, HuseyinThis study aimed to evaluate the comparative effects of taxifolin hydrate and trehalose on the quality of frozen-thawed ram spermatozoa for the first time. Ejaculates collected from six mature rams were pooled, and divided to eight equal aliquots to extend them with different concentrations of glycerol (%5 and %3), taxifolin hydrate (10, 100, and 500 mu M), and trehalose (60 mM) as eight groups (G5T0, G5T10, G5T100, G5T500, G3T0, G3T10, G3T100, and G3T500). After freeze-thawing process of cryopreservation, microscopic and oxidative stress parameters, and gene expression levels were investigated for understanding of possible impacts of taxifolin hydrate and trehalose. The study showed that G3T10 resulted in the highest post-thawed viability and mitochondrial activity. Moreover, all extenders with taxifolin hydrate reduced DNA fragmentation in comparison to G5T0, but DNA damage was prevented at the highest rate in presence of G5T10. The level of LPO significantly decreased in the groups G5T500 and G3T100, and the expression levels of NQO1, GCLC, and GSTP1 genes significantly increased in the groups G5T100, G5T500, G3T10, and G3T100 compared to the group G5T0. Finally, co-supplementation of tris-based extender having 3% glycerol with 60 mM trehalose and 10 mu M taxifolin hydrate in cryopreservation extender may be recommended to improve the quality of post-thawed ram spermatozoa. However, further in vivo and in vitro studies are suggested to evaluate fertility rates of frozen-thawed ram spermatozoa co-supplemented with trehalose and taxifolin hydrate.Öğe Effects of Long-Term Boron Administrations on High-Energy Diet-Induced Obesity in Rabbits: NMR-Based Metabonomic Evaluation(Medwell Online, 2011) Basoglu, Abdullah; Baspinar, Nuri; Ozturk, Aliye Sagkan; Akalin, Pinar PekerThe aim of this study is to provide insight into boron metabolism and to identify metabolic pathways which may explain the presumed increased susceptibility of livers. Boron was administrated in rabbits at three different doses and 96 h intervals for 7 months. Metabolomic profile based on NMR analysis was performed. The most pronounced findings were significant changes in alanine, methionine, pyruvate and creatine. Boron seems to be effective in the prevention of obesity and fatty liver. Metabolic end-points obtained by NMR can be easily assessed and interpreted alone or in. combination each other and with classical biochemical parameters for better understanding obesity and boron and liver metabolism.Öğe Effects of long-term Boron administrations on high-energy diet-induced obesity in rabbits: NMR-based metabonomic evaluation(2011) Basoglu, Abdullah; Baspinar, Nuri; Ozturk, Aliye Sagkan; Akalin, Pinar PekerThe aim of this study is to provide insight into boron metabolism and to identify metabolic pathways which may explain the presumed increased susceptibility of livers. Boron was administrated in rabbits at three different doses and 96 h intervals for 7 months. Metabolomic profile based on NMR analysis was performed. The most pronounced findings were significant changes in alanine, methionine, pyruvate and creatine. Boron seems to be effective in the prevention of obesity and fatty liver. Metabolic end-points obtained by NMR can be easily assessed and interpreted alone or in combination each other and with classical biochemical parameters for better understanding obesity and boron and liver metabolism. © Medwell Journals, 2011.Öğe The effects of various levels of boron supplementation on live weight, plasma lipid peroxidation, several biochemical and tissue antioxidant parameters of male mice** Effects of boron on performance, antioxidant and some metabolits of mice(Elsevier Gmbh, Urban & Fischer Verlag, 2018) Kurtoglu, Varol; Kurtoglu, Firuze; Akalin, Pinar PekerIn this study, live weight, live weight gain, plasma GPx, GR, LDH, ALT activities, triglyceride, total protein, albumin and LPO levels, also liver and brain SOD and GPx activities were investigated after administration of boron (0.10, 0.20 and 0.30 mg/day) into male mice with drinking water for 60 days. Blood albumin and triglyceride levels were not affected with boron (p > 0.05) where triglyceride levels, with increasing amounts of boron, displayed a slight decrease within the normal ranges. From the antioxidant-oxidant balance parameters, LPO and GR levels were not affected from boron, where GPx activity was increased significantly (p < 0.001) comparing the groups of boron and control. LDH and ALT activities were affected significantly (p < 0.001) with decreased ALT and increased LDH levels with increasing amounts of boron. In regards of liver and brain GPx and SOD activities, significant increases were determined. Liver GPx and SOD activities were increased within the groups with the increasing amount of boron, where in brain, SOD (p < 0.05) was affected significantly but GPx (p > 0.05) displayed a gradual insignificant increase. As regards live weight gain, a gradual increase was determined during experimental period, but only the 45th day, the increase was statistically significant (p < 0.05). It is suggested that, new studies on the effects of different doses and compounds of boron in laboratory animals in regards of antioxidant and metabolic effects may be helpful for the understanding of the subject.Öğe Erythrocyte and spermatozoa glucose-6-nhosphate dehydrogenase activity in merino rams: An experimental study(Shahid Sadoughi Univ Medical Sciences, 2018) Gurel, Huseyin; Baspinar, Nuri; Akalin, Pinar Peker; Altunok, Vahdettin; Kazak, FilizBackground: Glucose-6-phosphate dehydrogenase (G6PD) is the first enzyme of the pentose phosphate metabolic pathway that supplies reducing agents by maintaining the level of reduced nicotinamide adenine dinucleotide phosphate. Objective: It was aimed to determine the activity of erythrocyte and spermatozoa G6PD in the breeding and non-breeding seasons in Merino rams. And also, to find out the relation of these parameters with sperm quality parameters for better understanding the role of this enzyme in male fertility. Materials and Methods: 1.5-2 yr-old healthy, 14 Merino rams were involved. Ejaculate samples were collected using an artificial vagina, in October (the breeding season) and April (the non-breeding season). Blood samples were collected prior to sperm collection. Sperm volume (ml), motility (%), mass activity (1-5), concentration (x10(6)), viability (%), abnormal acrosome morphology (%) and abnormal sperm morphology (%) was evaluated. The activities of spermatozoa and erythrocyte G6PD were determined and the relation of sperm parameters with G6PD activity was evaluated. Results: Erythrocyte G6PD activity was higher (p <= 0.001), whereas spermatozoa G6PD activity was lower (p<0.001) in the breeding season (1.928 +/- 0.231 U/g hemoglobin, 129.65 +/- 28.41 U/g protein, respectively) from that in the non-breeding (0.530 +/- 0.066 U/g hemoglobin, 562.36 +/- 94.92 U/g protein, respectively). There were also significant differences among sperm quality parameters within the seasons. Positive correlation was determined between spermatozoa G6PD activity (r=0.053, p=0.03 and sperm concentration in the breeding season. Conclusion: Higher spermatozoa G6PD activity in October, where the level of polyunsaturated fatty acids is suggested to be increased, may reflect the increased need of nicotinamide adenine dinucleotide phosphate and thus higher G6PD activity for the oxidative balance.Öğe The influence of Theranekron® on glucose-6-phosphate dehydrogenase activity in rat ovaries, intact and with ischemia-reperfusion injury(Univ Zagreb Vet Faculty, 2021) Kozlu, Tolunay; Guler, Fatma; Akalin, Pinar Peker; Kazak, Filiz; Ergun, Yasar; Aslan, ErdoganThe effect of Theranekron (R) on rat ovaries was evaluated in healthy and ischemia-reperfusion injury models. The rats were divided into four groups: group 1: control, group 2: Theranekron (R) (single dose of 0.3 mg/kg intraperitoneally), group 3: torsion + detorsion, and group 4: torsion + detorsion + Theranekron (R) (single dose 0,3 mg/kg. intraperitoneally). The ovaries were homogenized by sonication before the analysis and supernatant glucose-6-phosphate dehydrogenase activity, reduced nicotinamide adenine dinucleotide phosphate, reduced glutathione and total protein levels were evaluated spectrophotometrically. Ovary tissues were histologically examined. In group 2, glucose-6-phosphate dehydrogenase activity was significantly reduced (P<0.01) compared to the control group and an increased number of atretic follicles, and hyperaemic and haemorrhagic regions were seen histologically: in group 3. although glucose-6-phosphate dehydrogenase activity was not changed, intense hyperaemia and hemorrhage was observed in the veins of the medulla region and in the cortex. Group 4 showed a decrease in glucose-6-phosphate dehydrogenase activity compared to the control group (P<0.01). Histologically, when compared to group 3, group 4 showed fewer atretic follicles and decreased hyperaemia and hemorrhage in the ovaries, excluding the medulla region. There were no significant differences regarding reduced glutathione and reduced nicotinamide adenine dinucleotide phosphate levels between the groups. The Theranekron (R) dose applied had some negative effects, such as reduced glucose-6-phosphate dehydrogenase activity. an increased number of atretic follicles, and hyperemia in the corpus luteum and medulla region in intact rat ovaries. Although it reduced glucose-6-phosphate dehydrogenase activity, Theranekron (R) may have had slight remedial effects on rat ovaries with ischemia-reperfusion injury.Öğe The Protective Effect of Rutin Against Methotrexate-Induced Nephrotoxicity in Rats(Aves, 2021) Tambag, Ali Kazim; Kazak, Filiz; Akalin, Pinar Peker; Kutlu, TuncerObjective: This study was purposed to investigate the possible protective effects of rutin on kidney tissue in a methotrexate-induced nephrotoxicity rat model. Methods: Rats were randomly divided into 4 groups: control group, methotrexate (MTX, 20 mg/kg) group, rutin (RUT, 50 mg/kg/day) group, and methotrexate + rutin (MTX+RUT, 20 mg/kg + 50 mg/kg/day, respectively) group. Biochemical and histopathological analyzes were performed on kidney tissues of rats at the end of the study. Results: It was determined that kidney tissue damage determined in the MTX group was decreased in the MTX + RUT group; there were no degenerative changes in the tubular epithelium of the MTX + RUT group, and only mild degenerative changes were observed rather than hydropic degeneration seen in MTX group. Conclusion: This study suggests that rutin can be effective in preventing the toxic effects of methotrexate on the kidney.Öğe Protective effects of nobiletin on cisplatin induced neurotoxicity in rats(Taylor & Francis Ltd, 2022) Kazak, Filiz; Akalin, Pinar Peker; Yarim, Gul Fatma; Baspinar, Nuri; Ozdemir, Ozgur; Ates, Mehmet Burak; Altug, Muhammed EnesObjectives This study was designed to investigate the possible antioxidant, antiapoptotic and neuroprotective effects of nobiletin on cisplatin-induced neurotoxicity rat model by evaluating neurotrophins, antioxidants and histopathology. Methods Forty male Wistar Albino rats were divided into four groups: control, cisplatin (CIS), cisplatin + nobiletin (CIS + NOB) and nobiletin + cisplatin (NOB + CIS). CIS + NOB was applied nobiletin (10 mg/kg, i.p.) during the last four days whereas NOB + CIS was applied nobiletin during the first four days of the study. Cisplatin (4 mg/kg, i.p. twice a day) was administered to the experimental groups on the 5th day of the study. All rats were sacrificed on the 10th day of the study. BDNF, NGF, G6PD, GPx, tGSH and MDA levels were determined in brain. In addition, routin histolopathological analysis and caspase-3 immunoreactivity assay were conducted. Results BDNF concentrations increased in nobiletin-administered groups, compared to Control and CIS and that the increase was statistically significant in NOB + CIS (p < 0.05). It was also found that G6PD activity increased (p < 0.05) in the nobiletin-administered groups, compared to control and CIS. Histopathologically, neuronal degeneration, oedema and gliosis increased in CIS compared to Control, and nobiletin administration decreased neuronal degeneration and oedema compared to CIS (p < 0.05). Cisplatin increased (p < 0.05) caspase-3 immunoreactivity in cerebrovascular endothelium and neurons compared to Control, while nobiletin administration decreased caspase-3 immunoreactivity in cerebrovascular endothelium. Caspase-3 immunoreactivity in neurons decreased only in NOB + CIS (p < 0.05). Conclusion Nobiletin increased BDNF concentration and G6PD activity in brain and when evaluated together with histopathological and immunohistochemical findings, it may have antioxidant, antiapoptotic and neuroprotective effects against cisplatin.Öğe Relationship of blood and seminal plasma ceruloplasmin, copper, iron and cadmium concentrations with sperm quality in Merino rams(Elsevier Science Bv, 2015) Akalin, Pinar Peker; Bulbul, Bulent; Coyan, Kenan; Baspinar, Nuri; Kirbas, Mesut; Bucak, Mustafa Numan; Gungor, SukruThe aim of the current study was to investigate the concentrations of ceruloplasmin, copper, iron, zinc and cadmium concentrations in blood serum and seminal plasma obtained from Merino rams. In addition, their relationship with sperm parameters, fertility rate and litter size were also studied. Blood and ejaculate samples (6 replicates) were taken in October from 19 Merino rams, aged between 18 and 24 months. Ceruloplasmin, copper, iron, zinc and cadmium in blood serum and seminal plasma were determined. Sperm parameters including volume, mass motility, motility, concentration, Hos-test, viability, abnormal sperm and acrosome abnormality in semen, fertility rate and litter size were also evaluated. Highly positive correlation was found between blood ceruloplasmin and blood copper concentrations (r=0.812, p<0.001), whereas negative correlation were determined between these parameters in seminal plasma (r=0.195, p<0.05). Seminal plasma copper concentration was positively correlated with seminal plasma cadmium (r=0.206, p<0.05) and seminal plasma iron (r=0,305, p<0.01) concentrations. Negative correlation was determined between blood ceruloplasmin level and acrosomal defect (r=0.443, p<0.05). Seminal plasma ceruloplasmin level was positively correlated with volume (r=0.255, p<0.01) and negatively correlated with abnormal sperm (r=0.186, p=0.058) and acrosome abnormality (r=0.213, p<0.05). Seminal plasma iron concentration was positively correlated with other abnormality (r=0.257, p<0.01). Seminal plasma cadmium concentration was positively correlated with sperm abnormality (r=0.207,p=0.052) and other abnormality (r=0.262,p <0.05) and negatively correlated with fertility rate (r=0.449,p =0.054). Blood cadmium concentration was negatively correlated with litter size (r=0.579, 9<0.01). In conclusion, blood and seminal plasma ceruloplasmin may be suggested to have positive influence regardless of copper with its antioxidant property whereas iron and cadmium have negative influence on sperm parameters and fertility in Merino rams. (C) 2015 Elsevier B.V. All rights reserved.Öğe The relationships of glucose-6-phosphate dehydrogenase, glutathione peroxidase, nicotinamide adenine dinucleotide phosphate and glutathione with milk quality parameters(Ataturk Universitesi, 2019) Akin, Zeynep; Akalin, Pinar Peker; Kazak, Filiz; Ergün, Yaşar; Başpinar, NuriIn this study, it was aimed to determine the relationship between with G6PD, GPx, NADPH, rGSH and milk yield and milk quality, to evaluate the effect of these parameters on milk quality, in Holstein cattle. Milk samples were collected from 20 healthy Holstein cattle. Milk yield was obtained from routine farm datum. The analyses of milk fat %, protein %, lactose %, non-fat dry matter %, urea % and casein % were held by "milk components measuring instrument", and G6PD and GPx activities in milk cell supernatants along with NADPH, rGSH and the total protein levels were assessed by spectrophotometric methods. Milk lactose levels (%) were negatively correlated with milk cell G6PD activity (r=-0.574, P<0.05) and NADPH levels (r=-0.485, P<0.05). Milk cell G6PD activity (r=0.708, P<0.01) and milk cell NADPH levels (r=0.609, P<0.01) were positively correlated with somatic cell count. A positive correlation (r=0.630, P<0.01) was determined between the somatic cell count and milk cell NADPH levels. In conclusion, there was no correlation between milk yield and milk quality parameters with the related parameters, except for lactose levels, in healthy cattle milk. It is suggested to investigate the relationship between lactose and G6PD with further studies. © 2019 Ataturk Universitesi. All rights reserved.Öğe Selected biochemical and oxidative stress parameters and ceruloplasmin as acute phase protein associated with bovine leukaemia virus infection in dairy cows(Natl Veterinary Research Inst, 2015) Akalin, Pinar Peker; Ataseven, Veysel Soydal; Dogan, Firat; Ergun, Yasar; Baspinar, Nuri; Ozcan, OguzhanThe aim of this study was to determine the ceruloplasmin (Cp) and vitamin C concentrations, the total antioxidant status (TAS), and selected biochemical parameters in dairy cows spontaneously infected with bovine leukaemia virus (BLV). Of the 27 cows included in the study, 18 animals were seropositive for enzootic bovine leukosis (EBL), whereas nine cows were seronegative and were used as controls. The serum aspartate aminotransferase (AST) (P = 0.003) and Cp concentrations (P = 0.03) decreased (65.17 +/- 5.03 and 7.70 +/- 0.72 respectively) in BLV-infected cows, as compared to healthy animals (100.67 +/- 11.50 and 10.40 +/- 0.70 respectively). A slight insignificant increase in alkaline phosphatase activity and unchanged levels of alanine aminotransferase, lactate dehydrogenase, calcium, magnesium, and TAS were demonstrated in EBL cows. As the TAS and vitamin C levels remained unchanged in EBL cows, it may be suggested that ruminants may compensate for the impaired oxidative/antioxidative balance. The results obtained also indicate that BLV may suppress AST and Cp synthesis or secretion in the liver through an unlcnown mechanism. The mechanism of action of BLV in hepatocytes, especially on AST and Cp, requires further investigation to elucidate the immune suppression caused by oncogenic retroviruses.
