Journals / Ulusal Cerrahi Dergisi / 2006 / Cilt: 22 - Sayı: 3

The effect of melatonin on serum and liver tissue lipid peroxidation in hepatic ,schemia referfusion injury

Deneysel hepatik iskemi reperfüzyon modelinde melatonin uygulamasının kan ve karaciğer doku lipid peroksidasyonuna etkisi

Pages
93–98
DOI
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Conclusion: Our study showed that application of an antioxidant in HIR injury, led to blood and lipid peroxidation and improvement in liver functions.

📌 3 Key Takeaways

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Objective & Hypothesis:Purpose: Hepatic ischemia-reperfusion injury (HIR) is a severe condition which is seen after hepatic resection procedures, hepatic arterial injury and in hepatic graft in living donor transplantation.
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Key Findings & Data:Materials and Methods: Three groups were designed for the study. 10 Wistar Albino rats (150–200 g) were used for each group.
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Conclusion & Impact:Conclusion: Our study showed that application of an antioxidant in HIR injury, led to blood and lipid peroxidation and improvement in liver functions.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Purpose: Hepatic ischemia-reperfusion injury (HIR) is a severe condition which is seen after hepatic resection procedures, hepatic arterial injury and in hepatic graft in living donor transplantation. In this study, our goal was to investigate the effect of melatonin, an INOS inhibitor and antioxidant, on the prevention of lipid peroxidation in blood and liver tissue induced by HIR. Materials and Methods: Three groups were designed for the study. 10 Wistar Albino rats (150–200 g) were used for each group. Group A: Sham, Group B: HIR, Group C: HIR + M. No substance was given to the rats in groups A and B. Ischemia was induced with vascular clampage for 45 minutes. With declampage, reperfusion injury was induced for 30 minutes. Five minutes before reperfusion, melatonin 10mgr/kg was given intraperitoneally to Group C. Forty-five minutes after reperfusion rats were sacrificed and blood and liver tissue samples were taken. Serum and liver tissue myeloperoxidase (MPO), malondialdehyde (MDA), were measured. Histopathological examinations for liver tissue were also performed. Results: Plasma and liver tissue MDA and MPO levels were higher in HIR group. In HIR Group (Group B) necrosis and inflammation was detected in the liver tissue. Application of melatonin decreased blood MDA levels significantly, but did not lead to a significant decrease in the tissue levels. Based on the statistical data we gathered, blood and tissue MPO levels were significantly reduced in the melatonin group (Group C) and liver histopathology was significantly improved in HIR group (Group B). Conclusion: Our study showed that application of an antioxidant in HIR injury, led to blood and lipid peroxidation and improvement in liver functions.

Özet

Amaç: Bu çalışmamızda deneysel hepatik iskemi- reperfüzyon (HIR)oluşturulan deneklerde bir indüklenebilir nitrik oksit sentetaz (İNOS) inhibitörü ve antioksidan olan melatonin uygulanmasının kan ve karaciğer doku lipid peroksidasyonu üzerine olan etkisi incelenmiştir. Durum Değerlendirmesi: Hepatik iskemi reperfüzyon hasarı, karaciğer transplantasyonu ve hepatik rezeksiyonlar sırasında oluşabilen bir durumdur. HIR hasarında, serbest oksijen radikalleri(SOR), indüklenebilir nitrik oksit sentetaz(iNOS) artmakta antioksidan kapasite azalmaktadır. Nitrik oksit ve SOR arasındaki reaksiyon, çok zararlı peroksinitritlerin oluşumuna ve lipid peroksidasyonuna yol açabilmektedir. Melatonin; iNOS düzeyini azaltmakta, SOR' lerini düşürmekte, sitokin ve adezyon molekülü ekspresyonunu inhibe etmektedir. Yöntem: Her biri 10 Wistar Albino rat (150–250 gram) içeren 3 grup oluşturuldu. Sham (Grup A) grubundaki ratlara laparatomi yapıldıktan sonra portal triad bulundu. Ancak herhangi bir işlem yapılmadı. HIR grubundaki(grup B) ratlarda 45 dakika süre ile vasküler klempaj ile hepatik iskemi oluşturuldu. Daha sonra klemp açılarak 30 dakika süre ile reperfüzyon sağlandı. HIR+melatonin(Grup C) uygulanan deneklerde, B grubuna ek olarak reperfüzyondan 5 dakika önce Melatonin (10 mg/kg) intraperitoneal olarak verildi. Ratlar sakrifiye edilerek kanda myeloperoksidaz(MPO), malondialdehit(MDA) düzeylerine bakıldı. Ayrıca karaciğer doku MPO, MDA düzeylerine bakıldı. Ek olarak, gruplardaki karaciğer dokusu histopatolojik olarak incelendi. Bulgular: HIR oluşturulan deneklerde, kan ve doku MDA ve MPO düzeyleri yüksek olarak bulundu. HIR grubunda (grup B) karaciğer dokusunda nekroz ve inflamasyon saptandı. Melatonin uygulanması ile kan MDA düzeylerinde anlamlı düzeyde azalma görülürken, doku MDA düzeylerinde ise anlamlı olmamakla birlikte düşme saptandı. Kan ve doku MPO düzeylerinde ise istatistiksel açıdan anlamlı azalma saptandı. Yine melatonin uygulanan grupta (grup C) karaciğer histopatolojisinde HIR grubuna (grup B) göre düzelme görüldü. Sonuç: Bu çalışmamızda bir antioksidan olan melatonin uygulanması ile HIR hasarının yol açabileceği kan ve doku lipid peroksidasyonunda azalma ve karaciğer fonksiyonlarında korunma gözlenmiştir.

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Cite This Article

ÇAĞLIKÜLEKÇİ, M. (2006). The effect of melatonin on serum and liver tissue lipid peroxidation in hepatic ,schemia referfusion injury. Ulusal Cerrahi Dergisi, Cilt: 22 - Sayı: 3, 93–98. https://ajindex.com/articles/325788

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