The present study was systematically carried out to observe the effects of elect roacupuncture on neuropathic pain and to investigate the preliminary molecular m echanisms of electroacupuncture analgesia in neuropathi...The present study was systematically carried out to observe the effects of elect roacupuncture on neuropathic pain and to investigate the preliminary molecular m echanisms of electroacupuncture analgesia in neuropathic pain by using behaviora l and in situ hybridization methods. The results were as follows: In CCI (chronic constriction injury) rats, hyperalgesia score is used as the sig n of neuropathic pain. Pain threshold after immediate electroacupuncture(EA) and the next day after repeated electroacupuncture was observed to investigate effe ct of electroacupuncture on hyperalgesia score of neuropathic pain. It showed th at on day 7 after CCI operation, controlateral EA of "Huantiao"(GB 30) and "Y anglingquan"(GB 34) acupoints (4 and 20 Hz alternately, 2.5 sec and 5 sec respe ctively, ≤1 mA, 30 min) immediately and significantly increased hyperalge sia score in neuropathic pain rats. When EA was given (the same as the former) o n day 9,11,13,16,18,20,23,25,27 after CCI operation, hyperalgesia score was obse rved the following day. The more EA was given, the higher the hyperalgesia score became, which showed an accumulative effect. It is thus suggested that EA ca n produce immediate analgesia in neuropathic pain rats, and have ac cumulative effects. Based on these, we will continue to investigate the expression of POMC mRNA in arcuate hypothalamic nucleus and the expression of ppOFQ mRNA in dorsal horn in neuropathic pain rats after EA treatment. Results showed that the expression of POMC mRNA in arcuate hypothalamic nucleus was increased significantly on day 7 a fter CCI operation, and had downward trend later. On day 7 after operation, the POMC mRNA expression was enhanced immediately and markedly 8 hours after one E A treatment. After repeated EA stimulation in neuropathic pain rats, the POMC mRN A expression was continually and obviously increased. These results suggested th at the continual increase of brain POMC mRNA expression might be one of the impo rtant factors involving EA analgesia in ne uropathic pain. Results also showed that the expression of ppOFQ mRNA in ipsilateral dorsal horn was decreased significantly on day 7 after CCI operation, and recovered a littl e later on. On day 7 after CCI operation, the ppOFQ mRNA expression in ipsilater al dorsal horn was immediately and markedly enhanced 8 hours after one EA treatm ent. After repeated EA stimulation in neuropathic pain rats, the ppOFQ mRNA expr ession was continually and obviously increased to normal. These results suggeste d that the recovery of spinal ppOFQ mRNA might be another important mechanism of EA analgesia in neuropathic pain.展开更多
目的:观察夏天无注射液(Corydalis decumbens Pers In jection,CDPI)对血管性痴呆(vascu lar dem entia,VD)大鼠学习记忆能力和海马血管生成素-1(angiopoietin-1,Ang-1)表达的影响,探讨其防治VD的作用机制。方法:采用永久性结扎双侧颈...目的:观察夏天无注射液(Corydalis decumbens Pers In jection,CDPI)对血管性痴呆(vascu lar dem entia,VD)大鼠学习记忆能力和海马血管生成素-1(angiopoietin-1,Ang-1)表达的影响,探讨其防治VD的作用机制。方法:采用永久性结扎双侧颈总动脉的方法制作VD大鼠模型,Morris水迷宫试验观察CDPI对大鼠空间辨别学习记忆能力的影响,HE染色观察海马的组织病理学变化,免疫组化染色,图像分析半定量测定Ang-1的表达。结果:CDPI 2 mg/kg、5 mg/kg治疗VD大鼠1个月和2个月后,显著缩短逃避潜伏期和搜索距离;治疗2个月后,明显增加海马内Ang-1的表达。结论:CDPI可明显改善VD大鼠的学习记忆能力,其作用机制可能与增加海马内Ang-1的表达有关。展开更多
文摘The present study was systematically carried out to observe the effects of elect roacupuncture on neuropathic pain and to investigate the preliminary molecular m echanisms of electroacupuncture analgesia in neuropathic pain by using behaviora l and in situ hybridization methods. The results were as follows: In CCI (chronic constriction injury) rats, hyperalgesia score is used as the sig n of neuropathic pain. Pain threshold after immediate electroacupuncture(EA) and the next day after repeated electroacupuncture was observed to investigate effe ct of electroacupuncture on hyperalgesia score of neuropathic pain. It showed th at on day 7 after CCI operation, controlateral EA of "Huantiao"(GB 30) and "Y anglingquan"(GB 34) acupoints (4 and 20 Hz alternately, 2.5 sec and 5 sec respe ctively, ≤1 mA, 30 min) immediately and significantly increased hyperalge sia score in neuropathic pain rats. When EA was given (the same as the former) o n day 9,11,13,16,18,20,23,25,27 after CCI operation, hyperalgesia score was obse rved the following day. The more EA was given, the higher the hyperalgesia score became, which showed an accumulative effect. It is thus suggested that EA ca n produce immediate analgesia in neuropathic pain rats, and have ac cumulative effects. Based on these, we will continue to investigate the expression of POMC mRNA in arcuate hypothalamic nucleus and the expression of ppOFQ mRNA in dorsal horn in neuropathic pain rats after EA treatment. Results showed that the expression of POMC mRNA in arcuate hypothalamic nucleus was increased significantly on day 7 a fter CCI operation, and had downward trend later. On day 7 after operation, the POMC mRNA expression was enhanced immediately and markedly 8 hours after one E A treatment. After repeated EA stimulation in neuropathic pain rats, the POMC mRN A expression was continually and obviously increased. These results suggested th at the continual increase of brain POMC mRNA expression might be one of the impo rtant factors involving EA analgesia in ne uropathic pain. Results also showed that the expression of ppOFQ mRNA in ipsilateral dorsal horn was decreased significantly on day 7 after CCI operation, and recovered a littl e later on. On day 7 after CCI operation, the ppOFQ mRNA expression in ipsilater al dorsal horn was immediately and markedly enhanced 8 hours after one EA treatm ent. After repeated EA stimulation in neuropathic pain rats, the ppOFQ mRNA expr ession was continually and obviously increased to normal. These results suggeste d that the recovery of spinal ppOFQ mRNA might be another important mechanism of EA analgesia in neuropathic pain.
文摘目的:观察夏天无注射液(Corydalis decumbens Pers In jection,CDPI)对血管性痴呆(vascu lar dem entia,VD)大鼠学习记忆能力和海马血管生成素-1(angiopoietin-1,Ang-1)表达的影响,探讨其防治VD的作用机制。方法:采用永久性结扎双侧颈总动脉的方法制作VD大鼠模型,Morris水迷宫试验观察CDPI对大鼠空间辨别学习记忆能力的影响,HE染色观察海马的组织病理学变化,免疫组化染色,图像分析半定量测定Ang-1的表达。结果:CDPI 2 mg/kg、5 mg/kg治疗VD大鼠1个月和2个月后,显著缩短逃避潜伏期和搜索距离;治疗2个月后,明显增加海马内Ang-1的表达。结论:CDPI可明显改善VD大鼠的学习记忆能力,其作用机制可能与增加海马内Ang-1的表达有关。
