比沙可啶对家兔近端结肠体外运动模式的影响
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Effects of bisacodyl on colonic motor patterns in 3-taeniated rabbit colon in vitro
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    摘要:

    目的 探索比沙可啶对家兔近端结肠运动模式影响的神经源性机制。方法 取34 只健康雄性家 兔,分离出具有3 条结肠带的近端结肠部分,置于恒温浴槽内,持续腔内灌注比沙可啶和浴槽内给予河豚毒 素(TTX)。采用影像记录结肠运动过程,时空图量化分析结肠运动模式变化规律。结果 ①持续腔内灌注 比沙可啶可引发长距离收缩运动(LDCs);②当规律性LDCs 发生时,同步发生的其他运动模式,如袋状收缩 和快速收缩被抑制;③ 0.15 和0.25 mg/ml 比沙可啶组引发LDCs 频率高于0.05 mg/ml 比沙可啶组(P <0.05), 但LDCs 持续时间、推进速度及振幅指数比较,差异无统计学意义(P >0.05);④ TTX 可阻断比沙可啶引发 的LDCs ;若预先给予TTX,比沙可啶不能引发LDCs。结论 持续腔内灌注比沙可啶可引发神经源性LDCs。

    Abstract:

    Objective To investigate the effects and the neurogenic mechanism of bisacodyl on colonic motor patterns in 3-taeniated rabbit colon in vitro. Methods The colonic motility of the 3-taeniated proximal colon of 34 male New Zealand rabbits were studied in the organ bath by spatio-temporal maps created from video recordings. Bisacodyl infusion and tetrodotoxin (TTX) in the bath were used to investigate the characteristics of the colonic motor patterns. Results ① Bisacodyl infusion induced rhythmic long distance contractions (LDCs); ② The prominent haustral boundary activity and fast propagating contraction were inhibited when rhythmic LDCs occurred; ③ The frequency of LDCs induced by bisacodyl in high concentration groups (0.15 mg/ml, 0.25 mg/ml) was higher than that in low concentration group (0.05 mg/ml, P < 0.05), but there was no significant difference in the duration, velocity and amplitude index of LDCs (P > 0.05); ④ These effects were blocked in the presence of TTX; LDCs was not induced by bisacodyl in the preconditioning of TTX. Conclusions Bisacodyl infusion induces LDCs through neurogenic pathway.

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黄敏,朱庆曦,田霞,韩峥,谭洁.比沙可啶对家兔近端结肠体外运动模式的影响[J].中国现代医学杂志,2019,(10):15-20

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  • 收稿日期:2018-11-13
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  • 在线发布日期: 2019-05-30
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