电针对局灶性脑缺血大鼠NO、NOS和ET-1的影响

目的：研究电针对局灶性脑缺血大鼠缺血区脑组织一氧化氮（NO）、NO合成酶（NOS）和内皮素（ET－1）的影响。方法：凝闭大鼠一侧大脑中动脉致局灶性脑缺血模型，选择缺血区脑组织NO、NOS和ET为指标，观察电针督脉经“大椎”、“百会”2穴对其影响。结果：缺血组在缺血60min后，NO、ET－1含量和NOS活性均明显升高；缺血加电针组，给予电针“大椎”、“百会”2穴治疗10min后，NO、ET－1含量和NOS活性均显著下降。结论：提示电针可抑制脑缺血后脑内NO、ET－1含量和NOS活性，从而保护脑缺血后继发神经元的损伤。

Effect of Electroacupuncture on NO,NOS and ET- 1 Leve1s in Rats with Focal Cerebral Ischemia

Objective] To study the effect of electroacupuncture on NO, NOS and ET - 1 levels in rats with focal cerebral ischemia (FCI). Methods] Rat models with FCI were established by occlusion of unilateral middle cerebral artery. Twenty - two rats were allocated to three groups: Group A (mimic operation group), Group B (model group) and Group C (model rats treated with electroacupuncture). NO, NOS and ET - 1 levels in brain homogenate were measured by spectrophotometry and radioimmunoassay method respectively. Results] Sixty minutes after modeling, NO, NOS and ET- 1 levels were increased and then decreased 10 minutes after acupuncturing Baihui (GV20) and Dazhui (GV14). Conclusion] Electroacupuncture of Baihui (GV20) and Dazhui (GV14) can protect neuron from ischemic injury by decreasing the levels of NO and ET - 1 and inhibiting the activity of NOS.