Journals / Ulusal Travma Dergisi / 2003 / Cilt: 9 - Sayı: 3

The effects of L-arginine and NG-nitro-L-arginine methylester on lypopolysaccharide and lipoteichoic acid induced liver injury in the rat

Ratlarda lipopolisakkarid ve lipoteikoik asit ile oluşan karaciğer hasarında L-arginin ve NG-nitro-L-arginin Metilester'in etkisi

Pages
163–168
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Conclusion: Our data indicated that overproduction of NO exerts detrimental effect on LTA-treated rats while providing a protective function in LPS group.

📌 3 Key Takeaways

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Objective & Hypothesis:Background: Whether nitric oxide (NO) protects or impairs the liver function and structure during the early phase of sepsis is still controversial.
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Key Findings & Data:Each group was divided into three subgroups which received saline, L-Arginine (L-Arg) or NG-nitro-L-arginine methylester (L-NAME) consecutively, one hour prior to either 5 mg/kg LPS or 3 mg/kg LTA injection.
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Conclusion & Impact:Conclusion: Our data indicated that overproduction of NO exerts detrimental effect on LTA-treated rats while providing a protective function in LPS group.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Enzim inhibitörleri · Arginin · Lipopolisakkaritler

Abstract

Background: Whether nitric oxide (NO) protects or impairs the liver function and structure during the early phase of sepsis is still controversial. The aim of this study is to evaluate the effect of NO on lipopolysaccharide (LPS) or lipoteichoic acid (LTA) induced liver injury in rats. Methods: One hundred twenty-six Wistar rats were assigned randomly and equally to LTA and LPS groups. Each group was divided into three subgroups which received saline, L-Arginine (L-Arg) or NG-nitro-L-arginine methylester (L-NAME) consecutively, one hour prior to either 5 mg/kg LPS or 3 mg/kg LTA injection. Plasma nitrite plus nitrate [NOx] were measured. Liver injury was assessed by measuring the rises in circulating liver enzymes and by scoring the extent of liver necrosis. Results: Administration of L-NAME+LPS not only reduced [NOx] production but also enhanced liver damage. LNAME+LTA caused an increase in the plasma levels of [NOx] (p=0.0006), and produced sinusoidal enlargement in liver. L-Arg protected the hepatocytes against LPS injury, whereas, enhanced the liver damage in the LTA group. Conclusion: Our data indicated that overproduction of NO exerts detrimental effect on LTA-treated rats while providing a protective function in LPS group.

Özet

Amaç: Sepsisin erken döneminde, nitrik oksit’in (NO) karaciğerin yapı ve fonksiyonu üzerindeki etkileri halen tartışmalıdır. Bu çalışmanın amacı; lipopolisakkarid (LPS) veya lipoteikoik asid (LTA) verilen ratlarda, NO’in karaciğer hasarına etkisini incelemektir. Gereç ve yöntem: Yüzyirmialtı rat randomize ve eşit olarak LTA veya LPS verilen iki gruba ayrıldı. Her grup, üç alt gruba bölünerek, birinci alt gruba %0.9 sodyum klorür (SF), ikinci alt gruba L-Arginin (L-Arg), üçüncü alt gruba ise NG-nitro-Larginin metilester (L-NAME) verildi. Bir saat sonra birinci gruba 3mg/kg LTA, ikinci gruba ise 5mg/kg LPS uygulanarak plazma nitrit ve nitrat [NOx] değerleri ölçüldü. Karaciğer hasarı, serum aminotransferaz seviyeleri ve hücre nekrozunun yaygınlığına göre skorlandırıldı. Bulgular: L-NAME, LPS’den sonra plazma [NOx] düzeyinde azalma, karaciğer hasarında artma meydana getirdi, LTA’dan sonra ise [NOx] düzeyinde artışla (p=0.0006) birlikte karaciğerde sinüzoidal dilatasyona yol açtı. L-Arg, [NOx] düzeyini artırarak hepatositleri LPS hasarına karşı korurken, LTA’dan sonra oluşan karaciğer hasarını belirgin biçimde artırdı. Sonuçlar: NO, LPS verilen ratlarda karaciğer hasarını azaltmakta, LTA verilenler de ise artırmaktadır.

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Cite This Article

ENGİN, A., KURUKAHVECİOĞLU, O., BUKAN, N., DURSUN, A. (2003). The effects of L-arginine and NG-nitro-L-arginine methylester on lypopolysaccharide and lipoteichoic acid induced liver injury in the rat. Ulusal Travma Dergisi, Cilt: 9 - Sayı: 3, 163–168. https://ajindex.com/articles/324960

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