长链非编码核糖核酸肺腺癌转移相关转录本1和核旁斑组装转录本1在低氧预适应小鼠海马神经保护中的作用研究  

The role of lncRNA MALAT1 and NEAT1 in neuroprotection of hypoxia preconditioning mouse hippocampus cell

作　　者：侯海东 闫磊 王丽平 杨静 桂玉成 杜永强 邵国 Hou Haidong;Yan Lei;Wang Liping;Yang Jing;Gui Yucheng;Du Yongqiang;Shao Guo(Department of Neurosurgery,Dongguan Qingxi Hospital,Dongguan,Guangdong 523660,China)

机构地区：[1]广东省东莞市清溪医院神经外科,523660 [2]内蒙古低氧适应转化医学重点实验室 [3]广东省深圳市龙岗区第三人民医院转化医学中心

出　　处：《中国脑血管病杂志》2024年第8期525-536,共12页Chinese Journal of Cerebrovascular Diseases

基　　金：国家自然科学基金(82060337);深圳市科技计划项目基础研究面上项目(JCYJ20220531092412028、JCYJ20230807121306012);深圳市龙岗区医疗卫生科技计划项目(LGKCYLWS2021000033、LGKCYLWS2023025)。

摘　　要：目的探索长链非编码核糖核酸(lncRNA)肺腺癌转移相关转录本1(MALAT1)和核旁斑组装转录本1(NEAT1)在低氧预适应(HPC)小鼠海马细胞中的表达及其与神经保护的关系。方法(1)将36只雄性美国癌症研究所(ICR)小鼠按照随机数字表法完全随机分为3组:对照组、低氧组和低氧预处理组,每组12只。对照组小鼠不进行低氧暴露,低氧组小鼠低氧暴露1次,低氧预处理组小鼠低氧暴露4次。低氧处理结束后立即将所有小鼠脱颈椎处死并分离海马组织分组保存。(2)将HT22细胞培养于含10%胎牛血清和100 U/ml青霉素-链霉素的培养基,细胞汇合率大于90%时将其转移至24孔板中培养后分2批进行处理。通过转染试剂将6 pmol的乱序小干扰核糖核酸(siRNA)、MALAT1 siRNA(siMALAT1)、siNEAT1、siMALAT1+siNEAT1分别一一对应转染至第一批HT22细胞的阴性对照组、siMALAT1组、siNEAT1组、siMALAT1+siNEAT1组细胞中,空白组不做任何处理;然后在正常条件下(5%CO_(2)和95%空气)培养48 h;第二批HT22细胞中,利用转染试剂分别将6 pmol的乱序siRNA、乱序siRNA、siMALAT1、siMALAT1、siNEAT1、siNEAT1分别一一对应转染至阴性对照组、阴性对照+氧糖剥夺-再灌注(OGD/R)组、siMALAT1组、siMALAT1+OGD/R组、siNEAT1组、siNEAT1+OGD/R组的HT22细胞中,转染后48 h将阴性对照组、siMALAT1组、siNEAT1组HT22细胞在正常条件下(5%CO_(2)和95%空气)继续培养,将阴性对照+OGD/R组、siMALAT1+OGD/R组、siNEAT1+OGD/R组细胞进行OGD/R处理,即低氧条件下(1%O_(2)+5%CO_(2)+94%N_(2))暴露8 h,之后再进行正常条件下培养16 h。(3)通过实时荧光定量聚合酶链反应(PCR)及蛋白免疫印迹法测定各组小鼠海马组织中MALAT1、NEAT1、N-甲基-D-天冬氨酸受体亚基2B(NR2B)信使核糖核酸(mRNA)、NR2B蛋白水平的相对表达量和各组HT22细胞转染处理后NR2B mRNA、NR2B蛋白水平的相对表达量及各组HT22细胞转染和OGD/R后的血影蛋白分解产物、�Objective To explore the expression of long non-coding ribonucleic acid(lncRNA)metastasis-associated lung adenocarcinoma transcript 1(MALAT1)and nuclear paraspeckle assembly transcript 1(NEAT1)in the hippocampus and HT22 cells of hypoxia pre-acclimated(HPC)mice and their relationship with neuroprotection.Methods(1)Thirty-six male Institute of Cancer Research(ICR)mice were randomly divided into three groups according to the random number table method of complete randomization:the control group,the hypoxia group and the hypoxia preconditioning group,with 12 mice in each group.Mice in the control group were not exposed to hypoxia,mice in the hypoxia group were exposed to hypoxia once,and mice in the hypoxia preconditioning group were exposed to hypoxia four times.Immediately after the end of hypoxia treatment,all mice were decapitated and killed and hippocampal tissues were isolated and preserved in groups.(2)HT22 cells were cultured in medium containing 10%foetal bovine serum and 100 U/ml penicillin-streptomycin.When cell confluence was greater than 90%,they were transferred to 24-well plates for culture and then processed in 2 batches.6 pmol disordered small interfering RNA(siRNA),MALAT1 siRNA(siMALAT1),NEAT1 siRNA(siNEAT1),siMALAT1+siNEAT1 were transfected into the negative control group,siMALAT1 group,siNEAT1 group,and siMALAT1+siNEAT1 group of the first batch of HT22 cells one by one by transfection reagent,and the blank group did not have any treatment;then they were cultured under normal conditions(5%CO_(2)and 95%air)for 48 h.In the second batch of HT22 cells,6 pmol of disordered siRNA,disordered siRNA,siMALAT1,siMALAT1,siNEAT1 and siNEAT1 were transfected one by one correspondingly to the negative control group and the negative control+oxygen-glucose deprived/reoxygen(OGD/R)group,siMALAT1 group,siMALAT1+OGD/R,siNEAT1 group,siNEAT1+OGD/R group.48 h after transfection,HT22 cells of negative control group,siMALAT1 group and siNEAT1 group were cultured under normal conditions(5%CO_(2)and 95%air),and the cells of

关 键 词：低氧预处理 长非编码RNA MALAT1 NEAT1 NR2B 

分 类 号：R743.3[医药卫生—神经病学与精神病学]