肌萎缩侧索硬化症相关基因VAPB对皮质神经元存活及突触蛋白表达的影响  被引量:1

Effects of amyotrophic lateral sclerosis related VAPB P56S mutation on cell viability and synaptic proteins of cultured cortical neurons

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作  者:杨璇 宋彬彬 刘佳文 翁绳凤 郭威 李宁 王秀明 于佳 

机构地区:[1]北京中医药大学附属北京老年医院老年病临床与康复研究所,北京100095 [2]北京中医药大学附属北京老年医院检验科,北京100095

出  处:《脑与神经疾病杂志》2018年第1期1-5,共5页Journal of Brain and Nervous Diseases

基  金:国家自然科学基金资助项目(81601117);北京市自然科学基金资助项目(7152077);北京市卫生系统高层次卫生技术人才资助项目(2015-3-117);国家留学基金国家公派访问学者项目(201709110044);北京老年医院院内科研基金(bjlnyy-青-5)

摘  要:目的探讨肌萎缩侧索硬化症(ALS)致病基因VAPB P56S突变对原代培养皮质神经元的细胞活性及突触蛋白表达的影响。方法以非转基因(nTg)和VAPB P56S转基因(P56S Tg)新生小鼠为细胞来源,体外培养皮质神经元10d和20d后,分别利用MTT法和Western blot法检测皮质神经元存活率以及突触蛋白表达水平。结果与nTg小鼠的皮质神经元比较,VAPB P56S转基因小鼠的皮质神经元在体外培养20d时细胞活力显著降低(P<0.0001),而在体外培养10d时无明显差异(P=0.5140),但突触囊泡膜蛋白SV2C(P<0.0001)、突触囊泡结合蛋白VAMP2(P=0.0047)、突触小体相关蛋白SNAP25(P<0.0001)和突触后致密蛋白PSD95(P<0.0001)表达水平均显著降低。结论 VAPB P56S降低原代皮质神经元活性,并在神经元变性死亡前即损害突触结构和功能相关蛋白的表达。Objective To investigate the effects of amyotrophic lateral sclerosis ( ALS ) related VAPB P56S mutation on cell viability and expression of synaptic proteins of cultured mouse cortical neurons. Method The cortical neurons from non-transgenic ( nTg ) and VAPB P56S transgenic ( P56S Tg ) newborn mice were cultured in vitro for 10 to 20 days. The cell viability and the expressions of synaptic proteins were detected with MTT assay and western blot, respectively. Results Compared to nTg mice, cortical neurons from P56S Tg mice showed reduced cell viabilities on 20 days in vitro ( P〈0.0001 ) and comparable cell viability on 10 days in vitro. On 10 days in vitro, cortical neurons from P56S Tg mice showed decreased level of synaptic vesicle glycoprotein 2C ( SV2C ) ( P〈0.0001 ) , vesicle associated membrane protein 2 ( VAMP2 ) ( P=0.0047 ) , synaptosome associated protein 25 ( SNAP25 ) ( P〈0.0001 ) and postsynaptic density protein 95 (PSD95)( P〈0.0001 ) . Conclusion VAPB P56S can impair the cell viability, as well as reduce the expression of synaptic structure and function related proteins of cultured cortical neurons before neuron degeneration.

关 键 词:肌萎缩侧索硬化症 VAPB 神经变性 突触蛋白 

分 类 号:R744.8[医药卫生—神经病学与精神病学]

 

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