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Valproic acid, one of the most used drugs for epilepsy patients, has some known side effects. Chard extract has many pharmacological activities. The study aims to evaluate whether valproic acid might interfere with oxidative metabolism in gastric tissue and whether chard ameliorates these effects. The Sprague Dawley rats were divided into four groups (n=8); control, chard-given control, valproic acid, and chard-given valproic acid. The aqueous extracts of chard leaves were given 1 h before the administration of valproic acid for 7 days. On the 8th day, the animals were sacrificed under anesthesia and gastric tissues were homogenized. When compared to the control group, valproic acid significantly increased malondialdehyde and catalase activity, while superoxide dismutase activity decreased. Chard administration increased glutathione and, sialic acid levels and decreased malondialdehyde levels and superoxide dismutase activity in the valproic acid group. Based on these findings, since chard increased gastric sialic acid levels, we may suggest that chard may protect gastric mucosa may be through its antioxidant effects.

The aim of our study was to examine the effects of exercise and calorie restriction on various tissue damage and antioxidant parameters in the brain and testis of rats in a natural aging model. For this purpose, male Sprague-Dawley rats were the control group (C), the elderly (A), the elderly with calorie restriction (ACR), the elderly who were exercised (AE) and the elderly who were exercised with calorie restriction (ACRE), they were divided into 5 groups. The control group was composed of three-month-old animals. The other group consisted of 15-month-old rats. Exercise and calorie restriction were applied for 6 weeks. At the end of the experiment, lipid peroxidation (LPO), nitric oxide (NO), glutathione (GSH) levels and superoxide dismutase (SOD), catalase (CAT), glutathione-S-transferase (GST) and tissue factor (TF) were determined in brain and testicular tissues homogenates. As a result of the study, the A group’s brain and testis LPO, NO levels and TF activity increased, GSH levels and SOD, CAT and GST activities decreased, when compared to the C group. As a result of our study, an increase in oxidant damage was observed with TF activity in the brain and testis in the natural aging model, and positive effects of exercise and calorie restriction on the antioxidant levels in the brain were determined, especially in aging. Amacımız doğal yaşlanma modelinde egzersiz ve kalori kısıtlamasının sıçanlarda beyin ve testiste çeşitli doku hasarı ve antioksidan parametreler üzerine etkilerinin incelenmesidir. Bu amaçla Sprague- Dawley sıçanlar kontrol (K), yaşlı (Y), kalori kısıtlaması uygulanan yaşlı (YKK), egzersiz uygulanan yaşlı (YE) ve kalori kısıtlaması ile egzersiz uygulanan yaşlı (YKKE) olmak üzere 5 gruba ayrıldı. Kontrol grubu üç aylık genç hayvanlardan oluşturuldu. Diğer gruplar 15 aylık sıçanlardan oluşturuldu. Egzersiz ve kalori kısıtlaması 6 hafta boyunca uygulandı. Deney sonunda beyin ve testis dokuları homojenatlarında lipit peroksidasyon (LPO), nitrik oksit (NO), glutatyon (GSH) düzeyleri ile süperoksit dismutaz (SOD), katalaz (CAT), glutatyon-S-transferaz (GST) ve doku faktörü (DF) aktiviteleri tayin edildi. Çalışma sonucunda K grubu ile kıyaslandığında Y grubunda, beyin ve testis LPO, NO düzeyleri ve DF aktivitelerinin arttığı, GSH düzeyleri ile SOD, CAT ve GST aktivitelerinin ise azaldığı gözlendi. Doğal yaşlanma modelinde beyin ve testiste DF aktivitesi ile beraber oksidan hasarda artış gözlenmiş olup, özellikle yaşlanmada egzersiz ve kalori kısıtlamasının beyinde antioksidan düzeyleri üzerinde olumlu etkileri belirlenmiştir.

An increasing number of studies have pointed out the side effects of valproic acid (VPA), an antiepileptic drug used for the treatment of seizures in children and adults. The aim of this study is to evaluate whether VPA interferes with oxidative metabolism in the heart and whether edaravone, the novel free radical scavenger, ameliorates any such effects.Female rats were divided into four groups: intact control animals, VPA (0.5 g/kg/day), edaravone (30 mg/kg/day), and VPA+edaravone (0.5 g/kg/day+30 mg/kg/day) injected groups for seven days. On the 8(th) day the animals were sacrificed under ether anesthesia, and hearts were homogenized. Concentrations of malondialdehyde (MDA), sialic acid (SA), glutathione (GSH) and the activities of superoxide dismutase (SOD), catalase (CAT), glutathione -S- transferase (GST), glutathione peroxidase (GPx), myeloperoxidase (MPO), Na+K+ ATPase and tissue factor (TF) were evaluated in the homogenates.In the VPA group, increased MDA levels and decreased GPx activities indicated heart damage compared with the control group. On the other hand, edaravone treatment in the VPA group increased the activities of GST and SOD and decreased the activities of TF and ALP.Our study is the first to demonstrate the beneficial effects of edaravone on the impaired oxidant/antioxidant status of heart in VPA-induced toxicity.