电针对氯胺酮成瘾大鼠海马CA1区酪氨酸羟化酶、c-fos表达的影响

目的:探讨电针对氯胺酮滥用成瘾戒毒治疗的物质基础。方法:将40只SD大鼠随机分为正常对照组、生理盐水(10 mL/kg)对照组、氯胺酮(100 mg/kg)组、氯胺酮(100 mg/kg)加电针组。按上述设定剂量,经腹腔注射给药,每天1次,连续7 d。氯胺酮加电针组于给药1周开始低频(2 Hz)电针交替刺激双侧"足三里"与"三阴交"穴位,每次30 min,每天1次,连续1周。采用免疫组织化学染色方法显示大鼠海马CA1区酪氨酸羟化酶(TH)、c-fos的表达。结果:与正常对照组和生理盐水对照组比,氯胺酮组大鼠海马CA1区TH、c-fos免疫反应阳性神经元的数目和阳性产物的表达水平明显增强(P<0.05,P<0.01)。与氯胺酮组比,氯胺酮加电针组TH、c-fos免疫反应阳性神经元的数目和阳性产物的表达显著减弱(P<0.01)。结论:电针"足三里"三阴交"可明显抑制氯胺酮成瘾引起的海马CA1区TH、c-fos表达的增强,提示电针可能通过抑制海马多巴胺神经元的活动改善氯胺酮成瘾。

Effects of electroacupuncture on expression of tyrosine hydroxylase and c-fos in hippocampal CA 1 area in ketamine-addiction rats

Objective To explore the morphological basis of electroacupuncture(EA) in relieving addiction of keta-mine.Methods Forty Sprague-Dawley rats were randomized into normal control,normal saline(10 mL/kg),model and keta-mine+EA groups.Ketamine-addiction model was established by intraperitoneal administration of ketamine(100 mg/kg),once a day for 7 days.EA(2 Hz) was applied to Zusanli(ST 36) and Sanyinjiao(SP 6) for 30 min,once a day for 7 days.The expression of tyrosine hydroxylase(TH) and c-fos in the hippocam...