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Öğe Chronic immobilization stress induces anxiety-related behaviors and affects brain essential minerals in male rats(Hogrefe Ag-Hogrefe Ag Suisse, 2022) Sahin, Zafer; Ozkurkculer, Alpaslan; Kalkan, Omer Faruk; Ozkaya, Ahmet; Koc, Aynur; Koca, Raviye Ozen; Solak, HaticeAlterations of essential elements in the brain are associated with the pathophysiology of many neuropsychiatric disorders. It is known that chronic/overwhelming stress may cause some anxiety and/or depression. We aimed to investigate the effects of two different chronic immobilization stress protocols on anxiety-related behaviors and brain minerals. Adult male Wistar rats were divided into 3 groups as follows (n = 10/group): control, immobilization stress-1 (45 minutes daily for 7-day) and immobilization stress-2 (45 minutes twice a day for 7-day). Stress-related behaviors were evaluated by open field test and forced swimming test. In the immobilization stress-1 and immobilization stress-2 groups, percentage of time spent in the central area (6.38 +/- 0.41% and 6.28 +/- 1.03% respectively, p < 0.05) and rearing frequency (2.75 +/- 0.41 and 3.85 +/- 0.46, p < 0.01 and p < 0.05, respectively) were lower, latency to center area (49.11 +/- 5.87 s and 44.92 +/- 8.04 s, p < 0.01 and p < 0.01, respectively), were higher than the control group (8.65 +/- 0.49%, 5.37 +/- 0.44 and 15.3 +/- 3.32 s, respectively). In the immobilization stress-1 group, zinc (12.65 +/- 0.1 ppm, p < 0.001), magnesium (170.4 +/- 1.7 ppm, p < 0.005) and phosphate (2.76 +/- 0.1 ppm, p < 0.05) levels were lower than the control group (13.87 +/- 0.16 ppm, 179.31 +/- 1.87 ppm and 3.11 +/- 0.06 ppm, respectively). In the immobilization stress-2 group, magnesium (171.56 +/- 1.87 ppm, p < 0.05), phosphate (2.44 +/- 0.07 ppm, p < 0.001) levels were lower, and manganese (373.68 +/- 5.76 ppb, p < 0.001) and copper (2.79 +/- 0.15 ppm, p < 0.05) levels were higher than the control group (179.31 +/- 1.87 ppm, 3.11 +/- 0.06 ppm, 327.25 +/- 8.35 ppb and 2.45 +/- 0.05 ppm, respectively). Our results indicated that 7-day chronic immobilization stress increased anxiety-related behaviors in both stress groups. Zinc, magnesium, phosphate, copper and manganese levels were affected in the brain.Öğe Effects of Naringenin on Oxidative Stress and Histopathological Changes in the Liver of Lead Acetate Administered Rats(Wiley, 2016) Ozkaya, Ahmet; Sahin, Zafer; Dag, Uzeyir; Ozkaraca, MustafaLead has several adverse effects on the body due to one of the environmental pollutants. We aimed to determine the effects of naringenin on the oxidative stress and the hepatic damage against lead acetate treatment in the liver of male rats. Naringenin was administered by orogastric gavage (50 mg/kg) and lead acetate was given as daily 500 parts per million in drinking water for 4 weeks. Lead and antioxidant activities were measured, and histopathological evaluation was performed in the liver. Lead concentrations, malondialdehyde, and antioxidant activity were restored by the naringenin. The grade of necrosis, hydropic degeneration, and hepatic cord disorganization was decreased by the naringenin. However, there were no differences in the degree of sinusoidal congestion, hepatic steatosis, and capsular fibrosis between lead acetate and naringenin + lead acetate groups. We can suggest that naringenin has antioxidant and chelating effects in the liver. Nevertheless, this effect is not enough against the lead acetate induced hepatic injury. (C) 2016 Wiley Periodicals, Inc.Öğe Evaluation of Naringenin Chelating and Hepatoprotective Potential against to Lead Acetate Administration(Wiley-Blackwell, 2015) Sahin, Zafer; Ozkaya, Ahmet; Dag, Uzeyir; Ozkaraca, Mustafa[Abstract Not Availabe]Öğe Geraniol attenuates hydrogen peroxide-induced liver fatty acid alterations in male rats(Ejmanager Llc, 2017) Ozkaya, Ahmet; Sahin, Zafer; Gorgulu, Ahmet Orhan; Yuce, Abdurrauf; Celik, SaitBackground: Hydrogen peroxide (H2O2) is an oxidant agent and this molecule naturally occurs in the body as a product of aerobic metabolism. Geraniol is a plant-derived natural antioxidant. The aim of this study was to determine the role of geraniol on hepatic fatty acids alterations following H2O2-induced oxidative stress in male rats. Methods: After randomization, male Wistar rats were divided into four groups (n = 7 each group). Geraniol (50 mg/kg, dissolved in corn oil) and H2O2 (16 mg/kg, dissolved in distilled water) were administered by an intraperitoneal injection. Administrations were performed during 30 days with 1-day interval. Results: Administration of H2O2 resulted with a significant increase in malondialdehyde (MDA) and a significant decrease in glutathione (GSH) peroxidase glutathione level; geraniol restored its effects on liver. However, hepatic catalase (CAT) activities were significantly higher in H2O2, geraniol, and geraniol+ H2O2 groups than control group. The ratio of hepatic total saturated fatty acids increased in H2O2-treated animals compared with control. In addition, hepatic total unsaturated fatty acids reduced in H2O2 group compared with control. The percentages of both hepatic total saturated and unsaturated fatty acids were not different between geraniol+ H2O2 and control groups. Conclusions: H2O2-induced oxidative stress may affect fatty acid composition in liver and body. Geraniol can partly restore oxidative hepatic damage because it cannot completely reverse the H2O2 -induced increase in hepatic CAT activities. Moreover, this natural compound can regulate hepatic total saturated and unsaturated fatty acids percentages against H2O2-induced alterations.Öğe Investigation of the effect of naringenin on oxidative stress-related alterations in testis of hydrogen peroxide-administered rats(Wiley, 2017) Sahin, Zafer; Ozkaya, Ahmet; Cuce, Gokhan; Uckun, Mirac; Yologlu, ErtanTestis tissue is prone to oxidation because its plasma membrane contains many polyunsaturated fatty acids. Naringenin is a plant-derived natural flavonoid. We investigated the possible ameliorative role of naringenin on the hydrogen peroxide (H2O2)-induced testicular damage in Wistar rats. Animals received 12mg/kg H2O2 by intraperitoneal injection, and 50mg/kg naringenin via orogastric gavage for 4 weeks. In the H2O2 group, the testis malondialdehyde level increased, while the amount of reduced glutathione, glutathione transferase activities, and the testis weight decreased. There were severe testicular damages in the H2O2 group otherwise their grade were less in the naringenin+H2O2 group. However, the serum testosterone concentrations decreased in both the H2O2 and the naringenin+H2O2 groups. The testicular zinc and calcium levels reduced in the H2O2-treated rats. In conclusion, the administration of H2O2 caused oxidative stress in the testes and naringenin supplementation decreased the H2O2-induced effects, except for changes in testosterone levels.Öğe Percentages of serum, liver and adipose tissue fatty acids and body weight are affected in female rats by long-term Central kisspeptin treatments(Taylor & Francis Ltd, 2023) Sahin, Zafer; Ozcan, Mete; Ozkaya, Ahmet; Canpolat, Sinan; Kutlu, Selim; Kelestimur, HalukThis study was conducted to determine the possible effects of long-term exogenous kisspeptin and its antagonist P234 on serum, liver and adipose tissue fatty acids (FA) profiles, as well as body weight, in female rats. Kisspeptin (50 pmol) and P234 (1 nmol) were administrated to the weaned Sprague-Dawley female rats by an intracerebroventricular injection from the 26th postnatal day to the 60th postnatal day. Percentages of the serum total saturated FA ( n-ary sumation SFA) and total monounsaturated FA ( n-ary sumation MUFA) were lower in the kisspeptin group. In the adipose tissue, n-ary sumation SFA was lower and total unsaturated FA higher in the P234 group. Moreover, long-term central kisspeptin injection caused a decrease in the body weight. When compared to the kisspeptin group, the final body weights were higher in the P234 and kisspeptin + P234 groups. According to our results, we suggest that kisspeptin has a regulatory role in FA metabolism and regulation of body weight.Öğe Role of geraniol against lead acetate-mediated hepatic damage and their interaction with liver carboxylesterase activity in rats(Taylor & Francis Ltd, 2018) Ozkaya, Ahmet; Sahin, Zafer; Kuzu, Muslum; Saglam, Yavuz Selim; Ozkaraca, Mustafa; Uckun, Mirac; Yologlu, ErtanIn this study, the effect of geraniol (50 mg/kg for 30 d), a natural antioxidant and repellent/antifeedant monoterpene, in a rat model of lead acetate-induced (500 ppm for 30 d) liver damage was evaluated. Hepatic malondialdehyde increased in the lead acetate group. Reduced glutathione unchanged, but glutathione S-transferase, glutathione reductase, as well as carboxylesterase activities decreased in geraniol, lead acetate and geraniol+lead acetate groups. 8-OhDG immunoreactivity, mononuclear cell infiltrations and hepatic lead concentration were lower in the geraniol+lead acetate group than the lead acetate group. Serum aspartate aminotransferase and alanine aminotransferase activities increased in the Pb acetate group. In conclusion, lead acetate causes oxidative and toxic damage in the liver and this effect can reduce with geraniol treatment. However, we first observed that lead acetate, as well as geraniol, can affect liver carboxylesterase activity.
