电针及辣椒素处理对脊髓后角AChE活性和[~3H]-QNB结合位点的影响

本实验在用溶媒及1．5％辣椒素分别处理大鼠左、右侧坐骨神经后第七天,分电针组和非电针组,观察大鼠脊髓后角内AChE活性和[3H]－QNB结合位点的变化。结果发现：（1）电计“环跳”穴后脊髓后角AChE活性增加,[3H]－QNB结合位点减少;（2）辣椒素处理右侧坐骨神经后相应节段同侧脊髓后角AChE活性降低,[3H]－QNB结合位点增加;（3）辣椒素处理可抑制电针提高脊髓后角AChE活性及部分抑制电针降低后角[3H]－QNB结合位点的作用。以上结果提示：ACh参与针刺信息一级传入并可能存在于辣椒素敏感神经元内。

Influence of Electroacupuncture and Capsaicin Treatment on AChE Activity and [~3H]-QNB Binding Sites in the Spinal Dorsal Horn

1. 5 % Capsaicin (Cap) or Vehicle was respectively used to treat the right or left sciatic nerve in 20 Sprague-Dawley rats. On the seventh day, the 20 rats were at random divided into electroacupuncture (EA) group and non-EA group, the spinal cord corresponding to the afferent segments of sciatic nerve was taken out for observing the changes of acetylcholinesterase (AChE) activity and [3H]-quinuelidinylbenzylate (QNB) binding sites in the spinal dorsal horn (SDH). The results were as follows: (1) EA "Huantiao" could enhance AChE activity in the SDH and decrecase [3H]-QNB binding sites; (2) Cap treating sciatice nerve could weaken AChE activity in the SDH and merease [3H]-QNB binding sites; (3) Cap treatment could inhibit or partially inhibit the actions of EA as above. The results indicated that ACh participated in the primary afferent of acupuncture information and might exist in Cap-sensitive neurons.