肝郁证便秘型肠易激综合征模型的建立与评价
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广东药科大学

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广东省自然科学基金面上项目(2023A1515011128)


Establishment and Evaluation of Constipated Irritable Bowel Syndrome Model with Liver Depression Syndrome
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Guangdong Pharmaceutical University

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Guangdong Provincial Natural Science Foundation General Project (2023A1515011128).

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    摘要:

    目的 采用单因素造模法和多因素联合造模法分别制备肝郁证便秘型肠易激综合征(IBS-C)大鼠模型,通过不同指标比较,提供理想的IBS-C实验动物模型。方法 42只SD大鼠随机分为空白组(Normal组)、冰水灌胃组(Cold组)、束缚组(Restrain组)、夹尾组(Tail组)、冰水灌胃+束缚组(C+R组)和冰水灌胃+夹尾组(C+T组)。造模期间观测各组大鼠的体重、进食量、饮水量和存活情况,进行旷场行为学、粪便Bristol评分、内脏敏感性、小肠推进等指标观测,HE染色观察大鼠结肠病理改变,ELISA法检测血清、结肠中5-HT、VIP含量。结果 造模后,各模型组大鼠体重下降(P < 0.05或P < 0.01),进食量、饮水量减少,各模型组血清中的5-HT含量均有上升。其中Cold组排便粒数及Bristol得分减少,结肠5-HT含量增加(P < 0.05或P < 0.01);Restrain组旷场总路程及平均速度减少(P < 0.01);Tail组糖水偏好降低(P < 0.01);C+T组糖水偏好率、旷场总路程、小肠推进率、排便粒数及Bristol得分减少,结肠中5-HT含量增加,VIP含量减少(P < 0.05或P < 0.01);C+R组旷场总路程、平均速度、结肠中VIP含量减少(P < 0.05);除Tail组,其余模型组在造模7 d、14 d,各压力值下均出现内脏高敏感性(P < 0.05或P < 0.01);病理形态学观察显示,各模型组未见明显的炎性细胞浸润或病理学改变。结论 采用冰水灌胃结合夹尾法可以成功建立肝郁证IBS-C大鼠模型,是5种方法的首选,为系统深入研究治疗中医药防治IBS-C机制奠定了基础。

    Abstract:

    Objective Through single factor modeling method and multi factor combined modeling method, to prepare the rat models of liver stagnation syndrome constipation type irritable bowel syndrome (IBS-C), and provide ideal experimental animal models of IBS-C by comparing different indicators. Methods 42 sprague-dawley rats were randomly divided into blank group (Normal group), cold water gavage group (Cold group), restraint group (Restrain group), tail clipping group (Tail group), cold water gavage+restraint group (C+R group), and cold water gavage+tail clipping group (C+T group). During the modeling period, the body weight, food intake, water intake, and survival status of each group of rats, and open field behavior, fecal Bristol score, visceral sensitivity, and small intestine propulsion were observed. HE staining was used to observe the pathological changes of the rat colon, and ELISA method was used to detect the content of 5-HT and VIP in serum and colon. Results After modeling, the weight loss of rats in each model group decreased (P < 0.05 or P < 0.01), the amount of food and water decreased, and the content of 5-HT in serum of each model group increased. In the Cold group, the number of fecal particles and Bristol score decreased, while the content of 5-HT in the colon increased (P < 0.05 or P < 0.01); the total distance and average speed of the restraint group in the open field decreased (P < 0.01); the preference for sugar water in the Tail group decreased (P < 0.01); in the C+T group, the preference rate for sugar water, total open field distance, small intestine propulsion rate, defecation particles, and Bristol score decreased, while the content of 5-HT in the colon increased and the VIP content decreased (P < 0.05 or P < 0.01); the total distance, average speed, and VIP content in the colon of the C+R group decreased (P < 0.05). Except for the Tail group, all other model groups showed visceral hypersensitivity (P < 0.05 or P < 0.01) at various pressure values on the 7th and 14th day of modeling; pathological observation showed that no significant inflammatory cell infiltration or pathological changes were observed in each model group. Conclusions The combination of ice water gastric lavage and tail clamping method can successfully establish a rat model of liver depression syndrome in IBS-C, which maybe the first choice of five methods and lays the foundation for systematic and in-depth research on the mechanism of traditional Chinese medicine in preventing and treating IBS-C.

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  • 收稿日期:2023-07-29
  • 最后修改日期:2023-11-10
  • 录用日期:2023-11-13
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