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A butyrate-induced model of non-inflammatory colonic hypersensitivity in rats
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- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 15
- DOI:
- 10.3969/j.issn.1009-3079.2009.15.015
- Key Word:
- 正丁酸盐;肠易激综合征;内脏;高敏性;大鼠;直肠扩张
Abstract： 目的: 研究正丁酸盐结肠灌注对大鼠结肠敏感性的影响, 探讨结肠致敏模型制作的新方法.方法: Wistar大鼠每天接受浓度为300 mmol/L丁酸盐1 mL从肛门灌肠2次, 共6 d. 分别在造模3、6 d后以半定量的方法观察大鼠对直肠扩张(CRD)的反应, 进行结肠敏感性评估, 记录初始感觉压力和最大耐受压力. 实验后处死大鼠, 取距肛门10 cm的结直肠, 观察肠黏膜损伤指数, 病理检查观察组织病理改变.结果: 模型组和盐水对照组均未见黏膜及黏膜下层组织结构破坏, 黏膜下嗜酸性粒细胞计数、肥大细胞计数无显著差异. 造模6 d模型组结肠运动最大压力较盐水对照组明显升高,差异有显著意义( t = 9.25, P<0.01). 模型组初始压力感觉及最大耐受压力较盐水对照组明显降低, 差异有显著意义( t = 36.71, 15.02, 均P<0.01).结论: 正丁酸盐灌肠可以使结肠敏感性增加,不破坏结肠黏膜组织结构, 结肠黏膜致敏与肥大细胞无关.
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