circ_HIPK3靶向miR-381-3p/ZNF217轴调控Aβ诱导的海马神经元功能和形态  

circ_HIPK3 regulates function and morphology of Aβinduced hippocampal neurons by targeting miR-381-3p/ZNF217 axis

作　　者：李伟 陈亮 吕昌迎 LI Wei;CHEN Liang;LYU Changying(Department 1 of Encephalopathy,Jinan Integrated Traditional Chinese and WesternMedicine Hospital,Jinan 271100,China;Department 3 of Encephalopathy,Jinan Integrated Traditional Chinese and WesternMedicine Hospital,Jinan 271100,China)

机构地区：[1]济南市中西医结合医院脑病一科,271100 [2]济南市中西医结合医院脑病三科,271100

出　　处：《天津医药》2024年第3期237-244,共8页Tianjin Medical Journal

基　　金：山东省中医药科技项目(Q-2022003)。

摘　　要：目的分析环状RNA同源结构域相互作用蛋白激酶3(circ_HIPK3)靶向miR-381-3p/锌指蛋白217 ZNF217)轴对β淀粉样蛋白(Aβ)诱导的海马神经元功能和形态的影响。方法制备新生大鼠海马神经元,分为对照组、Aβ组、si NC1组、si HIPK3组、si HIPK3+inhibitor NC组、si HIPK3+miR-381-3p inhibitor组、si HIPK3+miR-381-3p inhibitor+si NC2组、si HIPK3+miR-381-3p inhibitor+si ZNF217组,除对照组外其余组均通过40μmol/L Aβ1~42诱导。qRT-PCR法测定海马神经元circ_HIPK3、miR-381-3p、ZNF217 mRNA表达,透射电镜观察细胞形态,CCK-8法测定海马神经元存活率,Hochesst 33342法测定海马神经元凋亡,流式细胞仪检测海马神经元内Ca^(2+)荧光强度,Western blot法测定海马神经元磷酸化Tau蛋白(P-Tau)、B淋巴细胞瘤-2(Bcl-2)、Bcl-2相关X蛋白(Bax)、胱天蛋白酶-3(Caspase-3)、ZNF217蛋白表达,双萤光素酶报告基因分析miR-381-3p与circ_HIPK3、ZNF217靶向关系。结果对照组海马神经元结构正常,胞核形态正常,线粒体、内质网无病理改变;Aβ组海马神经元呈退行性改变,核形态异常,膜内陷,可见大量线粒体肿胀,胞浆内含大量脂滴空泡;与Aβ组相比,si HIPK3组海马神经元结构部分恢复;与si HIPK3组相比,si HIPK3+miR-381-3p inhibitor组海马神经元结构损伤严重;与si HIPK3+miR-381-3p inhibitor组相比,si HIPK3+miR-381-3p inhibitor+si ZNF217组海马神经元结构损伤减轻。与对照组相比,Aβ组海马神经元circ_HIPK3、ZNF217 mRNA和蛋白表达、凋亡率、Ca^(2+)荧光强度、P-Tau、Bax、Caspase-3蛋白表达升高,miR-381-3p表达、存活率、Bcl-2蛋白表达降低(P<0.05);与Aβ组相比,si HIPK3组海马神经元circ_HIPK3、ZNF217 mRNA和蛋白表达、凋亡率、Ca^(2+)荧光强度、P-Tau、Bax、Caspase-3蛋白表达降低,miR-381-3p表达、存活率、Bcl-2蛋白表达升高(P<0.05);与si HIPK3组相比,si HIPK3+miR-381-3p inhibitor组海马神经元circ_HIPK3、ZNF217 mRNA和蛋白表达、凋亡率、CaObjective To analyze the influence of cyclic RNA homologous domain interacting protein kinase 3(circ_HIPK3)on function and morphology of myloidβ-protein(Aβ)induced hippocampal neurons by targeting miR-381-3p/zinc finger protein 217(ZNF217)axis.Methods Hippocampal neurons of neonatal rats were prepared and divided into the control group,the Aβgroup,the si NC1 group,the si HIPK3 group,the si HIPK3+inhibitor NC group,the si HIPK3+miR-381-3p inhibitor group,the si HIPK3+miR-381-3p inhibitor+si NC2 group and the si HIPK3+miR-381-3p inhibitor+si ZNF217 group.Except the control group,all the other groups were modeled by 40μmol/L Aβ1~42.qRT-PCR was used to determine the circ of hippocampal neurons circ_HIPK3,miR-381-3p and ZNF217 mRNA levels.Cell morphology was observed by transmission electron microscope,and the survival rate of hippocampal neurons was measured by CCK-8 method.Hochesst 33342 method was used to measure apoptosis of hippocampal neurons.The intracellular Ca^(2+)fluorescence intensity of hippocampal neurons was detected by flow cytometry.The expression levels of P-Tau,B-cell lymphoma-2(Bcl-2),Bcl-2-associated X protein(Bax),Caspase-3 and ZNF217 proteins in hippocampal neurons were measured by Western blot assay.Double luciferase reporter genes were used to analyze the targeting relationship between miR-381-3p and circ_HIPK3,ZNF217.Results In the control group,the structure of hippocampal neurons was normal,the morphology of nucleus was normal,and there were no pathological changes in mitochondria and endoplasmic reticulum.In the Aβgroup,hippocampal neurons showed degenerative changes,abnormal nuclear morphology,membrane invagination,a large number of mitochondria swelling and a large number of lipid droplets vacuoles in cytoplasm.Compared with the Aβgroup,the hippocampal neuronal structure was partially restored in the si HIPK3 group.Compared with the si HIPK3 group,the hippocampal neuronal structure was severely damaged in the si HIPK3+miR-381-3p inhibitor group.Compared with the si HIPK3+miR-381-3p

关 键 词：海马 神经元 Tristetraprolin蛋白 circ_HIPK3 miR-381-3p ZNF217 

分 类 号：R749.16[医药卫生—神经病学与精神病学]