Journals / Ege Klinikleri Tıp Dergisi / 2018 / Cilt: 56 - Sayı: 3

The Effects of Experimental Irritable Bowel Syndro- me on Dopaminergic Pathways in Intestinal Surfa- ce Epithelium

Deneysel İrritabl Bağırsak Sendromunun İntestinal Yüzey Epitelinde Bulunan Dopaminerjik Yolaklar Üzerindeki Etkisi

Pages
96–101
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Therefore, regulation of this patway could be a major targeting effect when treating IBS patients.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Irritable bowel syndrome (IBS) is induced by dysfunction of central nervous and peripheral in- testinal systems, which affects an estimated 10–15 % population worldwide annually.
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Key Findings & Data:Accumulating evidence demonstrates that dopaminergic system is dysregulated in IBS; however, very little is known on its mechanism.
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Conclusion & Impact:Therefore, regulation of this patway could be a major targeting effect when treating IBS patients.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Irritable bowel syndrome (IBS) is induced by dysfunction of central nervous and peripheral in- testinal systems, which affects an estimated 10–15 % population worldwide annually. Although visceral hypersensitivity is a major pathophysiological feature of irritable bowel syndrome (IBS), its molecular mec- hanisms are still poorly understood. Accumulating evidence demonstrates that dopaminergic system is dysregulated in IBS; however, very little is known on its mechanism. We aimed to evaluate the relations- hip between the dopaminergic signaling pathway of c-fos, CREB and ERK in intestinal mucosa and visceral hypersensitivity in rat model of IBS. Material and Methods: The rat model of IBS-like vis- ceral hypersensitivity was induced by intra-colonic infusion of 0.5% acetic acid (AA) in saline once daily from postnatal days 8-21. Control animals received saline instead of AA. Experiments were performed at the end of the 8 weeks. Besides, morphology of both groups was assessed with hematoxylin and eosin sta- ining; tissues obtained from rat model were analyzed for c-fos, CREB and ERK levels in colon by immuno- histochemistry. Results: In hematoxylin and eosin staining, there was no difference with regard to morphology between two groups. c-fos immunoreactivity was found to be significantly increased in IBS when compared to cont- rol groups (p<0.05). Conclusions: Elevated expression of c-fos might be one of key mechanisms in etiology of IBS. Therefore, regulation of this patway could be a major targeting effect when treating IBS patients.

Özet

Amaç: İrritabl bağırsak sendromu (İBS), merkezi sinir sistemi ve periferik bağırsak sisteminin disfonksiyo- nuyla indüklenen ve yılda nüfusun yaklaşık % 10- 15’ini etkileyen bir hastalıktır. Visseral aşırı duyarlılık, irritabl bağırsak sendromunun önemli bir patofiz- yolojik özelliği olmasına rağmen, moleküler meka- nizmaları halen iyi anlaşılmamıştır. Bununla birlikte biriken kanıtlar, dopaminerjik sistemin İBS’de bozul- duğunu göstermektedir; ancak mekanizması ile ilgili çok az şey bilinmektedir. Amacımız; İBS oluşturulmuş sıçan modelinde visseral hipersensitivite ile intestinal mukozadaki dopaminerjik sinyal yolakları olan c-fos, CREB ve ERK arasındaki ilişkiyi incelemektir. Gereç ve Yöntem: İBS benzeri visseral hipersensitivite oluşturulan sıçanlara doğumdan sonra 8-21 günle- rinde, salin içinde % 0.5 asetik asit (AA) kolon içine infüzyon şeklinde günde bir kez verildi. Kontrol hay- vanlarına AA yerine salin verildi. Deneyler 8 haftanın bitiminde sonlandırıldı. Her iki grubun kolon morfo- lojisi hematoksilen ve eozin boyama ile histolojik ola- rak değerlendirildi ve yine elde edilen dokular c-fos, CREB ve ERK düzeyleri için immünohistokimyasal ola- rak analiz edildi. Sonuç: Hematoksilen ve eozin boyamada iki grup arasında morfoloji açısından fark yoktu. İBS’de c-fos immünoreaktivitesinin kontrol gruplarına göre an- lamlı olarak arttığı bulundu (p <0.05). Tartışma: c-fos’un artmış ekspresyonu İBS’ nin eti- yolojisinde kilit mekanizmalardan biri olabilir. Bu ne- denle, İBS hastalarının tedavisinde bu yolağın düzen- lenmesi önemli bir hedef olabilir.

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Cite This Article

ŞİMŞEK, F., BAHÇECİ, S. (2018). The Effects of Experimental Irritable Bowel Syndro- me on Dopaminergic Pathways in Intestinal Surfa- ce Epithelium. Ege Klinikleri Tıp Dergisi, Cilt: 56 - Sayı: 3, 96–101. https://ajindex.com/articles/153465

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