肝郁证便秘型肠易激综合征模型的建立与评价
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广东药科大学中药学院,广州 510006

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Establishment and evaluation of constipated irritable bowel syndrome model with liver depression syndrome
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School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China

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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,通过比较不同指标,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,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,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,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,其余模型组与空白组相比,在造模7、14 d,各压力值下均出现内脏高敏感性(P< 0. 05,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 种方法中的首选,为系统深入研究中医药防治IBS-C机制奠定了基础。

    Abstract:

    Objective To prepare rat models of liver stagnation syndrome constipation-type irritable bowel syndrome (IBS-C) using single and multi-factor modeling method with different indicators, to provide ideal experimental animal models of IBS-C. Methods Forty-two SD rats were divided randomly into blank (Normal), cold-water gavage (Cold), restraint (Restrain), tail-clamping (Tail), cold-water gavage + restraint (C + R), and cold-water gavage + tailclamping groups (C + T). Body weight, food intake, water intake, and survival status, as well as open-field behavior, fecal Bristol score, visceral sensitivity, and small intestine propulsion were observed in each group during the modeling period. Pathological changes in the rat colon were observed by hematoxylin and eosin staining, and the serum and colon contents of 5-hydroxytryptamine (5-HT) and vasoactive intestinal peptide ( VIP) were determined by enzyme-linked immunosorbent assay. Results The body weight in each group decreased after modeling (P< 0. 05, P< 0. 01), the food and water intakes decreased, and serum 5-HT levels increased. The number of fecal particles and Bristol score decreased while the colon 5-HT content increased in the Cold group (P< 0. 05, 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); the preference for sugar water, total open-field distance, small intestine propulsion rate, defecation particles, and Bristol score all decreased, while the colon 5-HT content increased and the VIP content decreased in the C + T group (P<0. 05, P< 0. 01); and the total distance, average speed, and VIP content in the colon decreased in the C + R group (P<0. 05). Except for the Tail group, all the model groups showed visceral hypersensitivity (P< 0. 05, P< 0. 01) compared to the blank group at various pressure values on days 7 and 14 of modeling. Pathological observations showed no significant inflammatory cell infiltration or pathological changes in any of the model groups. Conclusions The combination of icewater gastric lavage and tail clamping can be used to establish a rat model of liver depression syndrome in IBS-C. This may be the best of the five tested method, and the resulting model may lay the foundation for further systematic and in-depth research into the mechanism of traditional Chinese medicine in preventing and treating IBS-C.

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何佳慧,何杰滢,张百荣,张水娣,魏苑君,杨超燕,陈艳芬.肝郁证便秘型肠易激综合征模型的建立与评价[J].中国实验动物学报,2023,31(12):1555~1563.

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  • 收稿日期:2023-07-09
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  • 在线发布日期: 2024-01-25
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