电针对吗啡戒断大鼠前额叶皮质NR2B表达的影响

目的：观察电针对吗啡戒断大鼠空间学习记忆能力及前额叶皮质NR2B（N-甲基-D-天门冬氨酸受体NR2B亚单位）表达的影响,探讨电针治疗药物戒断后学习记忆损害的分子生物学机制。方法：选用雄性SD大鼠36只,随机分为空白组、模型组、模型加针刺组（针刺组）及模型加电针组（电针组）,每组各9只。除空白组外,其余各组大鼠采用逐日增量法背部皮下注射盐酸吗啡注射液,末次注射后3 h给予纳络酮快速戒断,建立吗啡戒断大鼠模型。造模成功后选取双侧＂肾俞＂＂足三里＂穴,分别采用针刺及电针方法治疗,15min/次,1次/日,连续6 d。采用Morris水迷宫测试大鼠空间学习记忆能力,应用Western Blot及RT...

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Published in世界针灸杂志：英文版 no. 3; pp. 43 - 48
Main Author 孙远征 刘铁镌 卫哲 范鸿莹 栾华
Format Journal Article
LanguageEnglish
Published 2014
Subjects
N-甲基-D-天门冬氨酸受体NR2B亚单位
吗啡戒断
实时荧光定量聚合酶链反应
水迷宫
电针
蛋白印迹
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Summary:目的：观察电针对吗啡戒断大鼠空间学习记忆能力及前额叶皮质NR2B（N-甲基-D-天门冬氨酸受体NR2B亚单位）表达的影响,探讨电针治疗药物戒断后学习记忆损害的分子生物学机制。方法：选用雄性SD大鼠36只,随机分为空白组、模型组、模型加针刺组（针刺组）及模型加电针组（电针组）,每组各9只。除空白组外,其余各组大鼠采用逐日增量法背部皮下注射盐酸吗啡注射液,末次注射后3 h给予纳络酮快速戒断,建立吗啡戒断大鼠模型。造模成功后选取双侧＂肾俞＂＂足三里＂穴,分别采用针刺及电针方法治疗,15min/次,1次/日,连续6 d。采用Morris水迷宫测试大鼠空间学习记忆能力,应用Western Blot及RT-PCR测定前额叶皮质NR2B蛋白与基因的表达水平。结果：水迷宫定位航行测试中,与空白组比较,模型组、针刺组及电针组大鼠逃避潜伏期明显延长（P〈0.01）;与模型组比较,针刺组、电针组大鼠逃避潜伏期明显缩短（P〈0.01）;与针刺组比较,电针组大鼠逃避潜伏期缩短（P〈0.05）。空间探索测试中,与空白组比较,模型组、针刺组及电针组穿越平台次数减少（P〈0.01）;与模型组比较,针刺组穿越平台次数增多（P〈0.05）,电针组显著增多（P〈0.01）。前额叶皮质NR2B蛋白表达,与空白组比较,模型组蛋白表达减少（P〈0.01）。与模型组比较,针刺组和电针组蛋白均升高（P〈0.01）,电针组表达高于针刺组（P〈0.01）。前额叶皮质NR2B mRNA表达,戒断后大鼠表达下降（P〈0.05）,与模型组相比,电针组大鼠表达上调（P〈0.05）,针刺组上调改变无统计学意义（P〉0.05）。结论：针刺和电针均可以改善戒断后大鼠空间学习记忆能力,且电针效果优于针刺治疗,其机制可能与对前额叶皮质脑区NR2B表达的调节有关。
Bibliography:electroacupuncture; morphine-withdrawal; Morris water maze; N-methyI-D-aspartate receptor subunit （NR2B）; western blot; real-time fluorescent quantitative polymerase chain reaction
11-2892/R
Objective To observe the effect of electroacupuncture （EA） on learning and memory abilities and expression of N-methyI-D-aspartate receptor subunit （NR2B） in prefrontal cortex in morphine-withdrawal rats and to investigate the molecular biological mechanisms. Methods Thirty-six male SD rats were randomly divided into four groups, namely control group （group A）, model group （group B）, model with acupuncture group （group C） and model with electroacupunture group （group D）, with 9 in each group. All rats except those in group A were subcutaneously injected with morphine hydrochloride injectio on the back with daily dosage increased day by day. Naloxone was given 3 h after the last injection to establish the models of morphinewithdrawal rats. After the models were established, the rats were treated with acupuncture and electroacupuncture respectively at bilateral ＂Shenshu＂ （肾俞 BL 23） and ＂Zusanli＂ （足三里 ST 36） for 15 min per time, once daily for 6 days. Space learning and memory abilities of the rats were measured by Morris water maze, and protein and gene expression levels of NR2B in prefrontal cortex were measured by Western Blot and RT-PCR. Results In place navigation test, the escape latency in group B, group C and group D was significantly prolonged compared with that of group A （P〈0.01）, the escape latency in group C and group D was significantly shortened compared with that of group B （P〈0.01） and the escape latency in group D was significantly shortened compared with that of group C （P〈0.05）; during spatial probe test, the number of times crossing the platform of group B, group C and group D decreased compared with that of group A （P〈0.01）, and compared with group B, the number of times crossing the platform of group C increased and the number of group D significantly increased （P〈0.01）. Decreased protein expression level of NR2B was found in group B when compared with that of group A （P〈0.01）, increased protein expression levels of NR2B were found in group C and group D when compared with that of group B （P〈0.01）, however, the expression level in group D was higher than that in group C （P〈0.01）. mRNA expression level of NR2B in prefrontal cortex in morphine-withdrawal rats decreased （P〈0.05）, however, compared with that of group B, the expression level increased in group D （P〈0.05）, and there was no statistical significance in increased expression level in group C （P〉0.05）. Conclusion Acupuncture and eletroacupunture can improve space learning and memory abilities of merphine-withdrawal rats, with better efficacy of eletroacupuncture than that of acupuncture, the mechanisms of which may be associated with the regulation of NR2B expression in prefrontal cortex.
SUN Yuan-zheng , LIU Tie-juan, WEI Zhe , FAN Hong-ying , LUAN Hua （ 1. Second Ward in Department of Acupuncture and Moxibustion, The Second Affiliated Hospital of Heilongjiang University of CM, Harbin 150001, China; 2. Heilongjiang University of CM ）
ISSN:1003-5257