目的观察加巴喷丁对神经病理性疼痛（neuropathic pain,NP）诱发的大鼠焦虑样行为和杏仁体基底外侧核（basolateral nucleus of the amygdale,BLA）N-甲基-D-天门冬氨酸（N-Methyl-DAspartate,NMDA）受体2B亚基（NR2B）表达的影响。方...目的观察加巴喷丁对神经病理性疼痛（neuropathic pain,NP）诱发的大鼠焦虑样行为和杏仁体基底外侧核（basolateral nucleus of the amygdale,BLA）N-甲基-D-天门冬氨酸（N-Methyl-DAspartate,NMDA）受体2B亚基（NR2B）表达的影响。方法选择30只健康的3月龄雄性Wistar大鼠,体重250～280g,随机均分为假手术组（S组）、神经病理性疼痛模型组（NP组）、加巴喷丁组（G组）。神经病理性疼痛模型采用右侧坐骨神经慢性压迫损伤（chronic constriction injury,CCI）的方法制备。G组于CCI后3d开始腹腔注射加巴喷丁100mg/kg,每天一次。分别于术后3、7、10和14d测右侧后爪机械缩足阈值（mechanical withdrawal threshold,MWT）和热缩足潜伏期（thermal withdrawal latency,TWL）。术后第14天,通过高架十字迷宫测试神经病理性疼痛对大鼠情绪的影响,计算开放臂进入次数百分比和开放臂停留时间百分比,然后取大鼠BLA组织用RT-PCR、Western blot和免疫荧光方法检测NR2BmRNA和蛋白表达。结果与术前1d比较,术后各时点NP组MWT明显减少、TWL明显缩短（P〈0.05）,而术后3dG组MWT明显减少、TWL明显缩短（P〈0.05）。与NP组比较,术后7、10和14dG组MWT明显增加、TWL明显延长（P〈0.05）,术后第14天S组和G组的开放臂进入次数百分比和开放臂停留时间百分比明显升高（P〈0.05）,术后第14天BLA区S组和G组NR2BmRNA相对吸光度明显减少、NR2B蛋白表达明显降低（P〈0.05）,而S组和G组平均相对荧光密度值明显下降（P〈0.05）。结论加巴喷丁具有治疗神经病理性疼痛作用可反转其导致的焦虑样反应并使杏仁体的NR2B表达下调。展开更多
Objective: To explore the effects of Peiyuan Tongnao(PYTN) Capsule on working memory, the content of glutamic acid, and the expression of NMDA receptor 2 B(NR2 B) in rats with cerebral ischemia. Materials and Methods:...Objective: To explore the effects of Peiyuan Tongnao(PYTN) Capsule on working memory, the content of glutamic acid, and the expression of NMDA receptor 2 B(NR2 B) in rats with cerebral ischemia. Materials and Methods: 52 Sprague-Dawley rats were randomly divided into sham group, model group, nimodipine group, and PYTN group. The bilateral common carotid artery occlusion(BCAO) was performed to establish rat model with cerebral ischemia in the model, nimodipine, and PYTN groups. Gastric lavage with some drug based on body weight conversion was performed daily for 4 weeks in the nimodipine and PYTN groups. The working memory of the rats was tested by Morris water maze. The expression of Nissl body in hippocampus tissue was observed by Nissl staining. The determination of Glu content in hippocampus was detected by high-performance liquid chromatography. The expression level of NR2 B in hippocampus area was determined using Western blot. Results: Morris water maze test on working memory escape latency. In the model group, day 1 versus day 4, there was a statistical difference(P < 0.05). In the nimodipine group, day 1 vs. day 4 displayed a statistical difference(P < 0.05).In the PYTN group, day 1 versus day 3 and day 1 versus day 4 were in significant differences(P < 0.05). The Glu content in hippocampus of the sham group was significantly different from that of model group(P < 0.05). The Glu content in the PYTN group was significantly different from that of the model group(P < 0.05). With regard to the expression of NMDA 2 B in hippocampus between the sham group and the model, nimodipine, and PYTN groups, all were displayed statistical significance(P < 0.01). As the same, the expression of NMDA2 B in the model group was significant from that of the nimodipine group(P < 0.05) and PYTN group(P < 0.01). Conclusion: PYTN capsule was beneficial for improving working memory and protect neural cells in rats of cerebral ischemia, which may be associated with upregulation of the expression of Glu and NMDAR2 B in hippocampus.展开更多
文摘Objective: To explore the effects of Peiyuan Tongnao(PYTN) Capsule on working memory, the content of glutamic acid, and the expression of NMDA receptor 2 B(NR2 B) in rats with cerebral ischemia. Materials and Methods: 52 Sprague-Dawley rats were randomly divided into sham group, model group, nimodipine group, and PYTN group. The bilateral common carotid artery occlusion(BCAO) was performed to establish rat model with cerebral ischemia in the model, nimodipine, and PYTN groups. Gastric lavage with some drug based on body weight conversion was performed daily for 4 weeks in the nimodipine and PYTN groups. The working memory of the rats was tested by Morris water maze. The expression of Nissl body in hippocampus tissue was observed by Nissl staining. The determination of Glu content in hippocampus was detected by high-performance liquid chromatography. The expression level of NR2 B in hippocampus area was determined using Western blot. Results: Morris water maze test on working memory escape latency. In the model group, day 1 versus day 4, there was a statistical difference(P < 0.05). In the nimodipine group, day 1 vs. day 4 displayed a statistical difference(P < 0.05).In the PYTN group, day 1 versus day 3 and day 1 versus day 4 were in significant differences(P < 0.05). The Glu content in hippocampus of the sham group was significantly different from that of model group(P < 0.05). The Glu content in the PYTN group was significantly different from that of the model group(P < 0.05). With regard to the expression of NMDA 2 B in hippocampus between the sham group and the model, nimodipine, and PYTN groups, all were displayed statistical significance(P < 0.01). As the same, the expression of NMDA2 B in the model group was significant from that of the nimodipine group(P < 0.05) and PYTN group(P < 0.01). Conclusion: PYTN capsule was beneficial for improving working memory and protect neural cells in rats of cerebral ischemia, which may be associated with upregulation of the expression of Glu and NMDAR2 B in hippocampus.
