P物质NK1受体对大鼠结肠动力的调节作用

被引:8
作者
张先俊 [1 ]
全晓静 [2 ]
余世界 [3 ]
机构
[1] 潜江市中心医院消化内科
[2] 西安交通大学第二附属医院消化内科
[3] 武汉大学人民医院消化内科
关键词
结肠; P物质; 速激肽受体; 大鼠; 动力;
D O I
暂无
中图分类号
R57 [消化系及腹部疾病];
学科分类号
100201 [内科学];
摘要
[目的]探讨P物质(substance P,SP)不同受体对大鼠结肠动力的调节作用。[方法]取大鼠近端结肠制备纵行肌(LMS)及环形肌(CMS)肌条,用张力换能器及多通道生理信号采集处理系统观察SP及其受体拮抗剂对SP诱导的LMS和CMS收缩活动的影响。[结果]SP显著促进大鼠结肠LMS和CMS自发性收缩活动[LMS:正常(0.85±0.06)g∶SP(1.02±0.05)g;CMS:正常(0.22±0.03)g∶SP(0.81±0.07)g,P<0.01];CMS孵育河豚毒素TTX后加入SP收缩幅度显著增加[正常(1.15±0.11)g∶SP(2.25±0.18)g,P<0.05];NK1受体特异性阻断剂L-703孵育肌条后加入SP,平滑肌收缩无显著增强,NK2受体特异性阻断剂GR159孵育后,SP能显著诱导平滑肌收缩增强(P<0.05)。[结论]NK1和NK2受体均参与SP对结肠动力的调节,且对CMS的调节过程中,NK1受体发挥更重要的作用,SP对LMS的调节可能主要通过肠神经系统。
引用
收藏
页码:152 / 155
页数:4
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