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Yıl:2011; Cilt: 1; Sayı: 1>> Özet
TAM METİN
Journal of Mood Disorders; 2011;1(1):14-18
İki uçlu bozukluk ve major depresif bozuklukta lipid peroksidasyon ve serum antioksidan enzim aktiviteleri
M Can, B Güven, L Atik, N Konuk
Zonguldak Karaelmas University
Amaç: Mizaç bozuklukları araştırmalarında lipid peroksidasyonu ve antioksidanların durumu ilgi uyandırmaktadır. Bu alandaki sorulara yeni bir bakış açısı getirmek amacıyla, serum lipid peroksidasyon ürünleri (MDA) ve antioksidan enzimler süperoksit dismutaz (SOD) ve glutatyon peroksidaz (GPX), etkinliğindeki değişiklikler, iki uçlu bozukluk ve tek uçlu depresyon hastalarında ölçüldü. Bu çalışma mizaç bozukluğu olan hastalarda oksidatif stres ve antioksidan yanıtı değerlendirmek amacıyla yapılmıştır.
Yöntem: Çalışmada 71 mizaç bozukluğu (39 iki uçlu bozukluk ve 32 tek uçlu depresyon) hastasında plazma MDA ve antioksidan enzim aktiviteleri (SOD ve GPX) düzeyleri ölçülmüş ve sonuçlar sağlıklı kontrollerle (n=30) karşılaştırılmıştır. MDA tiyobarbitürik asitle reaksiyon veren substratlar üzerinden, GPX aktivitesi Paglia ve Valentine yöntemi ile, SOD aktivitesi Sun ve arkadaşlarının metoduna göre ölçüldü.
Bulgular: Serum SOD ve GPX aktiviteleri bakımından kontrol grubu ile karşılaştırıldığında iki uçlu ve tek uçlu depresif hastalarda belirgin biçimde azalmış olarak bulunurken, iki uçlu bozukluk ve tek uçlu depresif hastalar arasında fark bulunmadı (p<0.05). Buna karşın serum MDA konsantrasyonu sağlıklı grup ile karşılaştırıldığında iki uçlu ve depresif hastalarda artmış olarak saptandı (p<0.05). İki uçlu ve depresif hastalar arasında MDA düzeyleri bakımından farklılık saptanmadı.
Sonuç: Bu çalışmada iki antioksidan savunma enzim aktivitesinin düşük olarak bulunması mizaç bozukluklarında artmış oksidatif stresin varlığına işaret etmektedir. Sonuçlarımız oksidatif stres ile ilişkili reaktif oksijen ürünlerinin artmış üretimi lipid oksidasyonunu indükleyebileceği ve dolayısıyla antioksidan savunma sisteminin bu yolla zayıflamış olabileceğine işaret etmektedir.
Lipid peroxidation and serum antioxidant enzymes activity in patients with bipolar and major depressive disorders
AIM: Lipid peroxidation and antioxidant status are becoming attractive areas of research in mood disorders. To add a new insight to the question, changes in the serum lipid peroxidation products (MDA) and activities of antioxidant enzymes superoxide dismutase (SOD), glutathione peroxidase (GPX), were measured in patients with bipolar disorder and unipolar depression. This study was undertaken to assess oxidative stress and antioxidant status in patients with mood disorders.
Method: The study was conducted in 71 mood disorder patients (39 bipolar disorder and 32 unipolar depression) and compared to healthy controls (n=30). Levels of plasma MDA and activities of antioxidant enzymes SOD and GPX were measured. MDA was determined as the measure of thiobarbituric acid reactive substances. GPX activity was measured by the method of Paglia and Valentine. SOD activity was determined according to the method of Sun and colleagues. These parameters were measured in 71 patients and compared to controls.
Results: Serum SOD and GPX activities was strongly decreased in bipolar and depressed patients when compared to control group (p <0.05), but there was no difference between bipolar and depressed patients. Conversly, serum MDA concentration was siginificantly increased in bipolar and depressed patients when compared to control group (p<0.05), but there was no difference between bipolar and depressed patients.
Conclusions: Decreased activities of two antioxidant defense enzymes in the present study indicate an increased oxidative stress in mood disorder. Our results suggesting that the generation of reactive oxygen species associated with the oxidative stress may induce lipid oxidation and consequently decreasing antioxidant defence in mood disorders.

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