کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2535418 1559115 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A dual role of 5-hydroxytryptamine receptor 3 in serotonin induced ion transport in rat distal colon
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب سلولی و مولکولی
پیش نمایش صفحه اول مقاله
A dual role of 5-hydroxytryptamine receptor 3 in serotonin induced ion transport in rat distal colon
چکیده انگلیسی

5-hydroxytryptamine (5-HT)-evoked intestinal secretion can be divided into neural and non-neural pathway. Recently, 5-HT3 receptor in neural pathway received much attention as a possible target in bowel diseases. The present study aims to investigate the effects of 5-HT3 receptor in different enteric neural plexus (myenteric plexus and submucosal plexus) on rat colonic ion transport by using rat intact colon and mucosa/submucosa preparations. Ussing chamber and real-time PCR techniques were performed in our present study. Surprisingly, we found that in mucosa/submucosa preparations, 5-HT-induced ΔISC (change in short-circuit current) was not inhibited, but further increased by pretreatment with 5-HT3 receptor antagonists, MDL72222 and Tropanyl-3, 5-dimethylbenzoate. And this response was significantly attenuated in the presence of tetrodotoxin (TTX). Conversely, in rat intact colon, 5-HT3 receptor antagonists significantly inhibited 5-HT-induced ΔISC. The results from real-time PCR proved the existence of 5-HT3 receptor in muscularis externa and submucosa. Taken together, 5-HT3 receptors possess a role of dual regulation on electrolyte secretion in rat distal colon, the neural stimulatory effect of 5-HT3 receptor in myenteric plexus and the inhibitory effect of 5-HT3 receptor in submucosal plexus.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Pharmacology - Volume 584, Issue 1, 14 April 2008, Pages 137–143
نویسندگان
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