The Effects of Melatonin and Vitamin E on Antioxidant Parameters in Copper Nephrotoxicity

Öz

Copper (Cu) compounds have been widely used in various fields especially industrial processes and agriculture.

Although trace amounts of Cu are essential to sustain life, excessive Cu is toxic for living organisms. This study aims to

investigate the effects of vitamin E and melatonin on antioxidant enzymes activities in kidney against acute Cu toxicity. In this

study, 28 Wistar albino rats were divided four equal groups (n=7) as control, Cu, Cu+Vitamin E, and Cu+Melatonin groups.

Superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT) enzymes activities and protein carbonyl content

were analyzed. Also, kidney function tests were evaluated. While Cu administration increased creatinine, blood urea nitrogen

(BUN), uric acid, Na, K and Mg levels, vitamin E and melatonin was effective reduction on these levels. Carbonyl level

significantly decreased in Cu+Vitamin E and Cu+melatonin groups compared to Cu group. Although SOD, GPx and CAT

activities in tissue decreased by Cu exposure, vitamin E and melatonin treatment showed significant increase on their

activities. Consequently, vitamin E and melatonin supplements may provide prevention Cu -based oxidation by strengthening

the antioxidant defense system. In this respect, it may show a protective effect by preventing the development of

nephrotoxicity.

Anahtar Kelimeler

• Antioxidant,Melatonin,Oxidative stress,Protein oxidation,Vitamin E.

Bakır Nefrotoksisitesinde Melatonin ve E Vitamini’nin Antioksidan Parametreler Üzerine Etkileri

Öz

Bakır (Cu) bileşikleri özellikle endüstri ve tarımda geniş kullanım alanına sahiptir. İz miktardaki Cu hayatın sürdürülebilir

olması için gerekliyken fazlası organizma için toksik etki yapmaktadır. Bu çalışma akut Cu toksisitesinde melatonin ve E

vitamini’nin böbreklerdeki antioksidan enzim aktivitelerine etkisinin araştırılması amacıyla planlanmıştır. Çalışmada 28 Wistar

albino sıçanlar kontrol grubu, Cu grubu, Cu+E vitamini grubu ve Cu+Melatonin grubu şeklinde eşit dört gruba (n=7) ayrıldı.

Böbrek dokusunda süperoksit dismutaz (SOD), glutatyon peroksidaz (GPx), katalaz (KAT) enzim aktiviteleri ve protein karbonil

içeriği analiz edildi. Ayrıca böbrek fonksiyon testleri değerlendirildi. Bakır uygulaması, kreatinin, kan üre nitrojeni (BUN), ürik

asit, Na, K ve Mg değerlerini artırırken, E vitamini ve melatonin bu değerlerin azalmasında etkili oldu. Karbonil seviyesi, Cu+E

vitamini veya Cu+melatonin gruplarında Cu grubuna göre önemli derecede azaldı. Doku SOD, GPx ve KAT aktiviteleri Cu

maruziyeti sonucu düşmesine rağmen; E vitamini veya melatonin uygulaması, bu aktivitelerde önemli bir artışa neden oldu.

Sonuç olarak, E vitamini ve melatonin takviyesi antioksidan sistemi güçlendirerek Cu temelli oksidasyonun engellenmesini

sağlayabilir. Bu sayede nefrotoksisitenin gelişmesini önleyerek koruyucu bir fonksiyon gösterebilir.

Anahtar Kelimeler

• Antioksidan,E vitamini,Melatonin,Oksidatif stres,Protein oksidasyonu,Protein oksidasyonu

Kaynakça

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