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Yıl:1999; Cilt: 10; Sayı: 2>> Özet
Türk Psikiyatri Dergisi; 1999;10(2):83-91
Depresyonda Malondialdehit ve Antioksidan Enzim Düzeyleri
M Bilici, H Efe, MA Köroğlu, HA Uydu, M Bekaroğlu, O Değer
Amaç: Bu çalışmada depresyonlu hastalarda bir lipid peroksidasyon ürünü olan malondialdehitin (MDA) ve çeşitli antioksidan enzimlerin plazma ve eritrositlerdeki düzeylerinin depresyonla bir ilişkisinin olup olmadığını ve bu maddelerin tanısal bir değer taşıyıp taşımadığını araştırmayı amaçladık.

Yöntem: Çalışmaya toplam 62 denek alınmıştır. Hasta grubu (n= 30) melankolik özellikler gösteren (n=12) ve göstermeyen (n=18) major depresyonlu bireylerden, kontrol grubu (n=32) sağlıklı kişilerden oluşturulmuştur. Hastaların klinik ve biyokimyasal olarak değerlendirilmesinde Hamilton depresyon derecelendirme ölçeği (HDDÖ) ve Hamilton anksiyete değerlendirme ölçeği (HADÖ), plazma glutatyon redüktaz (GR), glutatyon peroksidaz (GSH-Px), MDA ve eritrosit GR, GSH-Px, katalaz (KAT) ve süperoksit dismütaz (SOD) düzeyleri kullanılmıştır.

Bulgular: Plazma GR ve MDA düzeyleri ile eritrosit GSH-Px ve SOD değerleri, hastalarda hastalar içinde de melankolik olanlarda olmayanlara göre, kontrol grubu ile karşılaştırıldığında, anlamlı olarak yüksek bulunmuştur. Eritrosit SOD düzeylerinin HDDÖ puanları ile anlamlı pozitif bir ilişki gösterdiği bulunmuştur. Eritrosit SOD düzeylerinin hem MD ile kontrol grubunu, hem de MD alt gruplarını anlamlı olarak ayırt edici olduğu bulunmuştur. Eritrosit SOD düzeyi için elde edilen özgüllük değeri %90.6, duyarlılık değeri %46.6’dır.

Sonuç: Bu bulgular, depresyonlu hastalarda serbest radikallerin düzeylerinde bir artmayla ilişkili olarak MDA ve antioksidan enzim düzeylerinde yükselme olduğunu; bu maddelerin düzeylerinin özellikle melankolik olgularda yüksek bulunmasının, melankolik olgularda hastalığın biyolojik bir zemininin olabileceğini ve eritrosit SOD düzeylerinin grupları anlamlı olarak ayırt edebileceğini düşündürmektedir.

Malondialdehyde and Antioxidant Enzyme Levels in Major Depression
Objective: The present study aimed to examine lipid preoxidation product, malondialdehyde (MDA), and antioxidant enzyme levels in plasma and red blood cells; and relationship between these substances and major depression; and to explain their diagnostic values.

Method: Sixty-two subjects participated in this study; 32 healthy volunteers and 30 major depressed (MD) patients. The latter were classified according to DSM-IV criteria into. i) major depression with melancholia (n= 12), and ii) major depression without melancholia (n= 18). The 17-item Hamilton Depression Rating Scale (HDRS) and Hamilton Anxiety Rating Scale (HARS) were used to measure severity of depression and anxiety. Fasting blood was drawn for the assay of routine biochemical parameters and plasma glutathione reductase (GR), glutathione prexidase (GSH-Px), and MDA; and red blood cell was separated for GR, GSH-Px, catalase (CAT) and superoxide dismutase (SOD).

Results: Highly significant differences were found in plasma GR and MDA, and red blood cell GSH-Px and SOD levels between major depressed patients and healthy controls and between melancholic and non-melancholic patients. Significant positive correlation was found between erythrocyte SOD level and HDRS in patients with major depression. Red blood cell SOD levels were found to distinguish both MD and controls, and melancholic and non-melancholic patients. The sensitivity and specificity of red blood cell SOD levels were 46.6% and 90.6%, respectively.

Conclusion: These findings suggest that an abnormal production of MDA and antioxidant enzymes in conjunction with increased the amount of free radicals may occur in MD; increased levels of these substances, especially in melancholic patients, may underlie biological background of this illness; and red blood cell SOD levels may distinguish MD and controls and MD subgroups.

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