电磁辐射对大鼠海马神经元钙调蛋白激酶Ⅱ和环磷腺苷反应元件结合蛋白表达的影响  被引量:2

Effect of electromagnetic radiation on the expression of calmodulin kinase Ⅱ and cAMP responsive element binding protein in primary culture hippocampal neurons of rats

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作  者:史长华[1] 李玉红[1] 胡亚涛[1] 许倩[1] 

机构地区:[1]承德医学院,承德067000

出  处:《中华行为医学与脑科学杂志》2013年第10期880-882,共3页Chinese Journal of Behavioral Medicine and Brain Science

基  金:河北省自然科学基金(c2007000921);河北省卫生厅资助项目(20100136)

摘  要:目的探讨2000μW/cm2电磁辐射后钙调蛋白激酶Ⅱ(CaMKⅡ)和环磷腺苷反应元件结合蛋白(CREB)在元代培养海马神经元中表达的变化和意义。方法体外培养新生大鼠大脑海马神经元,实验分为空白对照组,假辐射组和1h/d、2h/d、3h/d辐射组。辐射组接受功率密度为2000μW/cm。的近场辐射,连续辐射5d。采用Western—Blot法检测海马神经元CaMKII和CREB蛋白的表达,RT—PCR法检测CaMKII和CREBmRNA表达的变化。结果电磁辐射后,1h/d、2h/d、3h/d辐射组大鼠海马神经元CaMKⅡ蛋白[分别为(0.59±0.05)、(0.44±0.08)、(0.18±0.04)]及其mRNA[分别为(0.41±0.08)、(0.34±0.04)、(0.24±0.02)]表达水平较空白对照组[(0.78±0.07)、(0.62±0.12)]明显降低(P〈0.05);CREB蛋白[分别为(0.49±0.05)、(0.40±0.04)、(0.17±0.03)]及其mRNA[分别为(0.68±0.11)、(0.53±0.08)、(0.30±0.03)]表达水平较空白对照组[(0.69±0.10)、(0.80±0.12)]明显降低(P〈0.05)。结论海马神经元CaMKⅡ和CREB的表达变化可能参与了电磁辐射致大鼠学习记忆功能改变的病理生理过程。Objective To investigate the changes of calmodulin kinase II ( CaMK U ) and cAMP respon- sive element binding protein(CREB) expressing in primary cultured hippocampal neurons and its relationship with learning and memory deficit after 2000 p.W/cm2 electromagnetic radiation. Methods Primary cultured hippocam- pal neurons in vitro were randomly divided into normal control group, sham-radiated group, and 1 h/d,2 h/d, 3 h/d radiation groups. The neurons in the radiation groups were received microwave exposure of 2000 p^W/cm2. The change of CaMK II and CREB protein in hippocampal neurons of each group of rats were measured with western blot, and the expression of CaMK 11 and CREB mRNA in hippocampus were determined by RT-PCR. Re- suits Compared with control group( (0.78 + 0.07 ), (0.62 + 0.12 ) ), the expression of CaMK 11 protein ( lh/d (0.59 +0.05) ,2h/d(0.44 +0.08) ,3h/d(0.18 +0.04) ) and its mRNA( lh/d(0.41 +0.08) ,2h/d(0.34 + 0.04) ,3h/d(0.24 -+0.02) ) was obviously decreased (P〈0.05). Compared with control group( (0.69 +0.10), (0.80 +0.12) ) ,the expression of CREB protein( lh/d(0.49 +0.05) ,2h/d(0.4 _+0.04) ,3h/d(0.17 +0.03) ) and its mRNA (1 h/d (0.68 -+ 0.11 ) , 2h/d(0.53 + 0.08 ) , 3h/d(0.30 + 0.03 ) ) was obviously decreased after ra- diation(P 〈 0.05). Conclusion Electromagnetic radiation of 2000 μW/cm2 exposure could weaken the learning and memory abilities of rats and the decreases in the expression of CaMK I/and CREB protein and their mRNA in hippocampus may be involved in the pathophysiological process of learning and memory deficit.

关 键 词:电磁辐射 海马神经元 钙调蛋白激酶Ⅱ 环磷腺苷反应元件结合蛋白 

分 类 号:R142[医药卫生—公共卫生与预防医学]

 

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