SD大鼠阳虚便秘模型的建立及评价

目的在中医药理论指导下建立SD大鼠阳虚便秘动物模型并对其进行评价。方法应用山西白醋加活性炭冰水法制作阳虚便秘动物模型。观察模型动物的一般生物学特征变化,进行模型动物的排便和在体结肠肌电等实验,检测模型动物的胃肠激素、肠神经递质等客观指标。结果造模后,模型动物的一般生物学特征表现为:腹胀、披毛蓬松、倦怠蜷缩、体重减轻、大便色黑、干燥;与空白对照组比较,模型动物的首粒排便时间明显延迟,6h内排便粒数明显减少,结肠收缩频率明显降低、结肠收缩幅度减弱,胃肠激素、肠神经递质分泌紊乱;经通便灵药物治疗后,上述症状和指标明显改善。造模后动物恢复6d,与空白对照组比较,其首粒排便时间和6h内排便粒数仍有差异。结论应用山西白醋加活性炭冰水能复制出稳定的SD大鼠阳虚便秘模型。

Establishment and evaluation on SD rats model with yang-deficiency and constipation

Aim To establish and evaluate Sprague-Dawley (SD) rats model with yang-deficiency and constipation at the direction of traditional Chinese medicine theories. Methods Rats model with yang-deficiency and constipation were induced by orally administration of white vinegar and active carbon-ice water. Changes of model rats in common biological characteristic, the number and time of excretion stool, colonic electromyography, gastrointestinal hormones and intestinal neurotransmitters were observed. Results Compared to the control group: changes of the model group in common biological characteristic including abdominal distension, puffed and withered hair, sluggish response, falling body weight, black and dry stool; Excretion time of the first granule stool became longer; Number of excretion stool within six hours became shorter; Intestine pushing rate decreased, and secretion of gastrointestinal hormones and intestinal neurotransmitters disordered, etc. After being treated with Tongbianling, the syndrome and indexes of model rats markedly improved. After 6 days′ resume, the model group in the experiment of excreting stool had markedly signification in comparison with the control group. Conclusion SD rats model with yang-deficiency and constipation could be stably established by administering white vinegar and active carbon-ice water.