盐酸戊乙奎醚对吗啡依赖大鼠相关脑区p-CREB及M5受体的影响  被引量:1

Effect of penehyclidine hydrochloride on expression of p-CREB and M5 receptor of the relevant brain regions in morphine dependent rats

在线阅读下载全文

作  者:冯晓波[1] 陈凯[1] 昌睿杰[1] 柯剑娟[1] 

机构地区:[1]武汉大学中南医院麻醉科,430071

出  处:《中华实验外科杂志》2011年第10期1740-1742,共3页Chinese Journal of Experimental Surgery

摘  要:目的观察盐酸戊乙奎醚(PHC)对吗啡依赖大鼠相关脑区p-CREB及M5受体的影响。方法将雄性SD大鼠30只随机分为对照组(NS组)、吗啡依赖组(MOR组)和PHC治疗组(PHC组),每组10只。连续7d交替皮下注射吗啡(10mg/kg,每天1次)或生理盐水,诱导大鼠的吗啡依赖位置偏爱效应。实验第8天停用吗啡,NS组与MOR组腹腔注射等体积的生理盐水;PHC治疗组则腹腔注射PHC 1.5mg/kg。30min后各组大鼠行CPP测试。Westernblot法检测大鼠中脑腹侧被盖区、伏隔核、前额叶皮层p-CREB的蛋白表达;实时定量聚合酶链反应(PCR)检测大鼠中脑腹侧被盖区、伏隔核、前额叶皮层M5受体的mRNA水平。结果(1)PHC治疗组的灰区停留时间与MOR组比较显著缩短[(422±103)s比(622±97)S,P〈0.01]。(2)MOR组中脑腹侧被盖区、伏隔核、前额叶皮层组织中p-CREB水平显著高于Ns组[(0.93±0.06)、(0.67±0.10)、(0.89±0.14)比(0.31±0.02)、(0.20±0.01)、(0.40±0.07),P〈0.01];与MOR组比较,PHC组中脑腹侧被盖区、伏隔核、前额叶皮层组织中p-CREB水平显著降低[(0.65±0.05)、(0.58±0.04)、(0.67±0.09),P〈0.05或P〈0.01]。(3)MOR组中脑腹侧被盖区、伏隔核、前额叶皮层组织中M5受体的mRNA含量较NS组显著增高(1.80、0.22、0.50比1.00、0.13、0.32,P〈0.01);与MOR组比较,PHC组能明显降低中脑腹侧被盖区、伏隔核、前额叶皮层组织中M5的mRNA含量(0.65、0.09、0.07,P〈0.01)。结论PHC能抑制吗啡依赖大鼠条件性位置偏爱的表达,该效应可能与PHC下调中脑腹侧被盖区、伏隔核、前额叶皮层组织中M5受体,抑制p-CREB表达有关。Objective To explore the effect of penehyclidine hydrochloride (PHC) on the expression of phosphorylation of cyclic AMP response element binding protein (p-CREB) and M5 receptor of the relevant brain regions in morphine dependent rats. Methods Thirty male SD rats were randomly assigned to 3 groups ( n = 10 each ) : morphine dependent group ( MOR group ) , PHC treatment groups ( PHC group) , normal saline control group ( NS group). The morphine conditioned place preference was induced by alternate subcutaneous injection of morphine for 7 days in rats ( 10 mg/kg, once daily, 09: 00) and sa- line ( 16: 00). At the day 8, the rats received the CPP test. The rats in PHC group were treated with PHC (1.5 mg/kg, ip) prior to the CPP test, whereas the rats were treated with saline in MOR and NS group. Western blotting was used to detect the expression of p-CREB in the relevant brain regions ( including ventral tegmental area, nucleus aecumbens, prefrontal cortex). Real-time polymerase chain reaction (PCR) was used to detect the expression of M5 receptor mRNA in the relevant brain regions ( including ventral tegmental area, nucleus accumbens, prefrontal cortex). Results ( 1 ) There were significant differences in the duration spent in the drug-paired side (gray area) between MOR and PHC groups [ (402 ± 103) vs. (622 ±97) s ,P 〈0. 01 ] ; (2) In MOR group, the p-CREB levels in ventral tegmental area, nucleus accumbens and prefrontal cortex were significantly higher than those in NS group [ (0. 93 ±0. 06) , (0.67 ±0. 10), (0.89±0. 14) vs. (0.31±0.02), (0.20±0.01), (0.40±0.07),P〈0.01]. Acute treatment withPHC led to an obvious decrease of p-CREB level in ventral tegmental area, nucleus aceumbens and prefrontal cortex [ (0. 65 ± 0. 05 ), ( 0. 58 ± 0. 04), ( 0. 67 ± 0. 09 ), P 〈 0. 05 or P 〈 0. 01 ] ; ( 3 ) As compared with NS group, the level of M5 receptor mRNA in ventral tegmental area, nucleus

关 键 词:盐酸戊乙奎醚 吗啡依赖 中脑腹侧被盖区 伏隔核 前额叶皮层 P-CREB M5受体 

分 类 号:R749.6[医药卫生—神经病学与精神病学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象