Journals / Turkish Journal of Gastroenterology / 2012 / Cilt: 23 - Sayı: 2

Sıçanlarda metiyonin ve kolinden fakir diyetle oluşturulan steatohepatitte probiyotiklerin etkisi

Effects of probiotics on methionine cholinedeficient diet-induced steatohepatitis in rats

Pages
110–121
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The preventive effect of probiotics may be due, in part, to modulation of apoptosis and their anti-inflammatory activity.

📌 3 Key Takeaways

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Objective & Hypothesis:Background/aims: Intestinal bacteria induce endogenous signals that play a pathogenic role in hepatic insulin resistance and non-alcoholic fatty liver disease.
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Key Findings & Data:Methods: Two studies, shortterm (2 weeks) and long-term (6 weeks), were carried out using 60 male Wistar rats.
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Conclusion & Impact:The preventive effect of probiotics may be due, in part, to modulation of apoptosis and their anti-inflammatory activity.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Background/aims: Intestinal bacteria induce endogenous signals that play a pathogenic role in hepatic insulin resistance and non-alcoholic fatty liver disease. Probiotics could modulate the gut flora and could influence the gut-liver axis. We aimed to investigate the preventive effect of two probiotic mixtures on the methionine choline-deficient diet-induced non-alcoholic steatohepatitis model in rats. Methods: Two studies, shortterm (2 weeks) and long-term (6 weeks), were carried out using 60 male Wistar rats. The 2-week study included six groups. Rats were fed with methionine choline-deficient diet or pair-fed control diet and were given a placebo or one of two probiotic mixtures (Pro-1 and Pro-2) by orogastric gavage. In the 6-week study, rats were allocated into four groups and were fed with methionine choline-deficient diet or pair-fed control diet and given a placebo or Pro-2. At the end of the 2- and 6-week periods, blood samples were obtained, the animals were sacrificed, and liver tissues were removed. Serum alanine aminotransferase activity was determined; histologic and immunohistochemical analysis was performed for steatosis, inflammation, protein expression of tumor necrosis factor-α, and apoptosis markers. Results: In both studies, methionine choline-deficient diet caused an elevation of serum alanine aminotransferase activity, which was slightly reduced by Pro-1 and Pro-2. In the 2- and 6-week studies, feeding with methionine choline-deficient diet resulted in steatosis and inflammation, but not fibrosis, in all rats. In the 2-week study, in rats fed with methionine choline-deficient diet and given Pro-1, steatosis and inflammation were present in 2 of 6 rats. In rats fed with methionine choline-deficient diet and given Pro-2, steatosis was detected in 3 of 6 rats, while inflammation was present in 2 of 6 rats. In the 6-week study, in rats fed with methionine choline-deficient diet and given Pro-2, steatosis and inflammation were present in 3 of 6 rat livers. In both the 2- and 6-week studies, methionine choline-deficient diet resulted in tumor necrosis factor-α, proapoptotic Bax, caspase 3, caspase 8, and anti- apoptotic Bcl-2 expression in all rat livers. Pro-1 and Pro-2 treatment influenced protein expression involved in apoptosis and tumor necrosis factor-α in varying degrees. Conclusions: Pro-1 and Pro-2 decrease methionine choline-deficient diet-induced steatohepatitis in rats. The preventive effect of probiotics may be due, in part, to modulation of apoptosis and their anti-inflammatory activity.

Özet

Amaç: Intestinal bakteriler, hepatik insülin direnci vc non-alkolik yağlı karaciğer hastalığında patojenik rol oynayan endojen sinyalleri indük-lerler. Probiyotikler barsak florasını düzenleyerek karaciğer-barsak ekseninde etki gösterebilirler. Bu çalışmada sıçan modellerinde metiyonin ve kolinden fakir diyet ile oluşturulan non-alkolik steatohepatitte iki probiyotik karışımının koruyucu etkisini araştırmayı amaçladık. Yöntem ve Gereç: Altmış adet erkek Wistar sıçan kullanılarak 2 ve 6 haftalık iki çalışma yapılmıştır, iki haftalık çalışma 6 gruptan oluşturulmuştur. Sıçanlar metiyonin ve kolinden fakir diyet ya da kontrol diyetle beslenmiş ve orogastrik sonda ile plasebo ya da iki probiyotik karışımı (Pro-1, Pro-2) verilmiştir. Altı haftalık çalışmada sıçanlar 4 gruba bölünerek metiyonin ve kolinden fakir diyet ya da kontrol diyet ile beslenmişler ve plasebo ya da Pro-2 verilmişlerdir. Çalışma sonunda sıçanlar kanları alınarak kurban edilmiş ve karaciğerleri alınmıştır. Serum alanin ami-notransferazlari saptanan hayvanlarda steatozis, inflanıasyon, tümör nekroz faktörü - a ekspresyonu ve apopitozisiıı saptanması için histolojik ve immünhistokimyasal inceleme yapılmıştır. Bulgular: Her iki çalışmada da metiyonin ve kolinden fakir diyet serum alanin anıinotransfe-raz seviyesinde, Pro-1 ve Pro-2 ile hafif dtişüriilebilen. bir artışa neden olmuştur, iki ve 6 haftalık çalışmalarda metiyonin ve kolinden fakir diyet tüm sıçanlarda steatozis ve inflamasyona neden olurken fibrozis oluşturmamıştır. İki haftalık çalışmada metiyonin ve kolinden fakir diyet ve Pro-1 ile beslenen 6 sıçanın 2'sinde steatozis ve inflanıasyon görülmüştür. Metiyonin ve kolinden fakir diyet ve Pro-2 ile beslenen 6 sıçanın 3'ünde steatozis görülürken 2'sinde inflanıasyon vardı. Altı haftalık çalışmada metiyonin ve kolinden fakir diyet ve Pro-2 ile beslenen 6 sıçanın 3'ünde steatozis ve inflanıasyon vardı. Her iki çalışmada da metiyonin ve kolinden fakir diyet tüm sıçan karaciğerlerinde, tümör nekroz faktö-rii-ct, proapopitotik Box, caspase 3, caspase 8 vc anti-apopitotik Bcl-2 ekspresyonuna neden oldu. Sonuç: Pro-1 ve Pro-2, sıçanlarda metiyonin ve kolinden fakir diyet ile oluşturulan steatohepatiti azaltmaktadır. Probiyotiklerin koruyucu etkisi kısmen apopitoz modülasyonu ve antiinfla-matuar etkilerine bağlı olabilir.

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Cite This Article

KARAHAN, N., İŞLER, M., KOYU, A., KARAHAN, A. G., KILIÇ, G. B., ÇİRİŞ, İ. M., SÜTÇÜ, R., ONARAN, İ., ÇAM, H., KESKİN, M. (2012). Sıçanlarda metiyonin ve kolinden fakir diyetle oluşturulan steatohepatitte probiyotiklerin etkisi. Turkish Journal of Gastroenterology, Cilt: 23 - Sayı: 2, 110–121. https://ajindex.com/articles/409654

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