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 in...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 le展开更多
文摘目的本研究采用对大鼠急性及慢性水杨酸盐腹腔注射建立耳鸣动物模型,通过检测大鼠耳蜗核中肿瘤坏死因子α(TNF-α),白介素-1β(IL-1β),白介素6(IL-6)以及NMDA受体亚基(NR2B)m RNA及其蛋白的表达,了解慢性水杨酸盐诱导的耳鸣动物耳蜗核中是否出现炎症因子表达的改变,以探讨炎症因子在耳鸣中的作用。方法实验动物随机分为4组,按给药时间分别为:正常对照组、急性注射2小时组、慢性注射14天组、停药后恢复14天组。各组大鼠断头处死后迅速分离出耳蜗核;采用SYBR Green实时荧光定量PCR(real-time reverse transcriptase polymerase chain reaction,real-time RT-PCR)及Western blot(蛋白质印迹)方法,检测各组大鼠耳蜗核TNF-α,IL-1β,IL-6及NR2B基因m RNA及其蛋白的表达,观察各组间的差异。结果(1)在慢性注射14天组,TNF-α和NR2B m RNA及其蛋白表达水平较正常对照组、急性注射2小时组、停药后恢复14天组高,且差异有统计学意义(p<0.05);急性注射2小时组、慢性注射14天组、停药后恢复14天组IL-1βm RNA水平较正常组高,慢性注射14天组、停药后恢复14天组IL-1β蛋白水平较正常组高,差异有统计学意义(p<0.05);IL-6 m RNA及其蛋白表达水平在四组之间无明显差异;(2)TNF-α和NR2B m RNA表达具有明显的正相关(p<0.01);IL-1β和NR2B m RNA表达无明显正相关(p>0.05)。结论(1)长期注射水杨酸盐可能通过上调耳蜗核中TNF-α,IL-1β和NR2B基因表达导致大鼠耳鸣;(2)TNF-α和NR2B可能在水杨酸盐诱发耳鸣的过程中起协同作用。
基金Supported by Project of Youth Science Foundation of Heilongjiang Province of China:QC 2011 C 040Project of Harbin Science and Technology Bureau:2012RFQX S 052
文摘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 le
