ISSN: 1307-279X
The Effect Of Melatonin On Blood and Tissue (Liver and Kidney) Lipid Peroxidation and Tissue NF-?B Levels In LPS Induced Obstructive Jaundice [YMJ]
YMJ. 2008; 2(6): 47-61

The Effect Of Melatonin On Blood and Tissue (Liver and Kidney) Lipid Peroxidation and Tissue NF-?B Levels In LPS Induced Obstructive Jaundice

Bora Ustunsoy1, Mehmet Caglikulekci2, Hakan Canbaz1, Musa Dirlik1, Oner Bilgin1, Tugba Karabacak3, Ozlen Bagdatoglu4, Semra Erdogan5
1Mersin University Medical School, Department of General Surgery
2Yeditepe University Faculty of Medicine, Department of General Surgery
3Mersin University Medical School, Department of Pathology
4Mersin University Medical School, Department of Biochemistry
5Mersin University Medical School, Department of Biostatistics

Objectives In obstructive jaundice, free radical production is increased and antioxidative activity is reduced. Melatonin has a beneficial effect with antiinflammatory and antioxidant activity acting as a free radical scavenger. Melatonin inhibits the NF-?B expressions, suppresses cytokine expression/release and inhibits the adhesion molecule expressions. The aim of this study was to investigate the effects of Melatonin on liver and renal tissue NF- ?B expressions, serum and tissue lipid peroxidation in lipopolysaccharide (LPS) induced obstructive jaundice. Methods We randomized 60 rats into 6 groups. Group A: Sham, Group B: Obstructive jaundice, Group C: Obstructive jaundice + Melatonin (20 mg kg-1 intraperitoneal), Group D: Obstructive jaundice+ LPS (10 mg kg-1), Group E: Obstructive jaundice + LPS + Melatonin. Group F: Obstructive jaundice + Melatonin +LPS. Biochemical markers of lipid peroxidation as Malondialdehyde(MDA) and Myeloperoxidase(MPO) were determined after sacrifice in each groups. Results Serum and Liver/renal tissue MDA, MPO levels and tissues NF-?B increased in group 2, 4 and 6 compared to group 1. After the administration of Melatonin (group 3 and 5), liver/renal tissue MDA and MPO levels decreased; and tissues NF-?B levels decreased as compared to other groups. Conclusions In this model of OJ stimulated by LPS, Melatonin suppressed the adverse effects of OJ in the absence of LPS. It is clearly shown that melatonin acts as a hepatic and renal protective effect against oxidative stress in OJ. However, it failed to prevent lipid peroxidation in case of LPS-induced OJ when it is administrated before or after LPS.

Keywords: Lipid peroxidation, Lipopolysaccharide, LPS, Melatonin, NF-?B expressions Obstructive jaundice, Liver, Kidney, Animal.

LPS ile Uyarılmıs Tıkanma Sarılığı Modelinde Melatonin Uygulanmasının Kan ve Doku (Karaciğer/Böbrek) Lipid Peroksidasyonu ile Doku NF-?B Düzeylerine Etkisi

Bora Ustunsoy1, Mehmet Caglikulekci2, Hakan Canbaz1, Musa Dirlik1, Oner Bilgin1, Tugba Karabacak3, Ozlen Bagdatoglu4, Semra Erdogan5
1Mersin University Medical School, Department of General Surgery
2Yeditepe University Faculty of Medicine, Department of General Surgery
3Mersin University Medical School, Department of Pathology
4Mersin University Medical School, Department of Biochemistry
5Mersin University Medical School, Department of Biostatistics

Amaç Tıkanma sarılığında serbest oksijen radikal üretimi artmakta ve antioksidatif kapasite azalmaktadır. Melatonin serbest oksijen radikallerini azaltmakta, antioksidan etki göstermektedir. Melatonin, NF-?B ekspresyonunu azaltmakta, sitokin salınımı ve adhezyon molekül olusumunu inhibe etmektedir. Bu çalısmanın amacı; LPS ile uyarılmıs Tıkanma sarılığı modelinde Melatonin kullanımının karaciğer ve böbrek lipid peroksidasyonu ve NF-?B ekspresyonuna etkisini irdelemektir. Materyal Metod 60 rattan olusan 6 grup olusturuldu. Grup A: Sham, Grup B: Tıkanma Sarılığı, Grup C: Tıkanma Sarılığı + Melatonin (20 mg kg-1 intraperitoneal), Grup D: Tıkanma sarılığı+ LPS (10 mg kg-1), Grup E: Tıkanma sarılığı+ LPS + Melatonin. Grup F: Tıkanma sarılığı + Melatonin +LPS. Sonuçlar Serum ve doku (karaciğer/böbrek) MDA, MPO düzeyleri ve doku NF-?B seviyeleri grup 2, 4 ve 6’ da artmıs olarak bulundu. Melatonin uygulanmasını takiben (grup 3 ve 5), karaciğer/böbrek doku MDA ve MPO seviyelerinde azalma saptandı Ayrıca bu gruplarda; doku NF-?B seviyeleri diğer gruplara göre düsük bulundu. Yorum Bu deneysel çalısma modelinde LPS ile uyarılan tıkanma sarılığında melatonin etkisi arastırılmıstır. Melatonin kullanımı ile tıkanma sarılığı olusturulan deneklerde karaciğer ve böbrek dokusunda koruyucu etki sağlanmıstır. Ancak LPS ile uyarılan deneklerde melatonin verilmesinin endotoksemiyi önlemede etkili olmadığı görülmüstür.

Anahtar Kelimeler: Lipid peroksidasyonu, Lipopolisakharid, LPS, Melatonin, NF-?B Düzeyleri Engellenmis Sarılık,Karaciğer,Böbrek, Rat.

Bora Ustunsoy, Mehmet Caglikulekci, Hakan Canbaz, Musa Dirlik, Oner Bilgin, Tugba Karabacak, Ozlen Bagdatoglu, Semra Erdogan. The Effect Of Melatonin On Blood and Tissue (Liver and Kidney) Lipid Peroxidation and Tissue NF-?B Levels In LPS Induced Obstructive Jaundice. YMJ. 2008; 2(6): 47-61
Manuscript Language: English
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