陈雪莹,杨珂,王冬,张亮,王颖,朱慧,赵钕君,王志刚.低强度脉冲超声保护MPP+诱导N2a细胞损伤[J].中国医学影像技术,2020,36(2):190~195
低强度脉冲超声保护MPP+诱导N2a细胞损伤
Protective effect of low-intensity pulsed ultrasound on N2a cells injury induced by MPP+
投稿时间:2019-07-14  修订日期:2019-10-22
DOI:10.13929/j.issn.1003-3289.2020.02.006
中文关键词:  帕金森病  超声检查  1-甲基-4-苯基吡啶离子  N2a细胞
英文关键词:Parkinson disease  ultrasonography  1-methyl-4-phenylpyridiniumion  N2a cells
基金项目:国家自然科学基金(81771845、81571688、81601513)。
作者单位E-mail
陈雪莹 重庆医科大学附属第一医院超声科, 重庆 400016
超声分子影像重庆市重点实验室, 重庆 400010 
 
杨珂 重庆医科大学附属儿童医院儿科研究所, 儿童发育疾病研究教育部重点实验室, 儿童发育重大疾病国家国际科技合作基地, 儿科学重庆市重点实验室, 重庆市干细胞治疗工程技术研究中心, 重庆 400014  
王冬 重庆医科大学附属第一医院超声科, 重庆 400016
超声分子影像重庆市重点实验室, 重庆 400010 
wang57554@163.com 
张亮 超声分子影像重庆市重点实验室, 重庆 400010
重庆医科大学附属第二医院超声科, 重庆 400010 
 
王颖 超声分子影像重庆市重点实验室, 重庆 400010
重庆医科大学附属儿童医院儿科研究所, 儿童发育疾病研究教育部重点实验室, 儿童发育重大疾病国家国际科技合作基地, 儿科学重庆市重点实验室, 重庆市干细胞治疗工程技术研究中心, 重庆 400014 
 
朱慧 重庆医科大学附属第一医院超声科, 重庆 400016
超声分子影像重庆市重点实验室, 重庆 400010 
 
赵钕君 重庆医科大学附属第一医院超声科, 重庆 400016
超声分子影像重庆市重点实验室, 重庆 400010 
 
王志刚 超声分子影像重庆市重点实验室, 重庆 400010
重庆医科大学附属第二医院超声科, 重庆 400010 
 
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中文摘要:
      目的 观察低强度脉冲超声(LIPUS)能否减弱1-甲基-4-苯基吡啶离子(MPP+)诱导的N2a细胞毒性,对帕金森病(PD)细胞模型发挥保护作用。方法 以MPP+作用于N2a细胞24 h,建立PD细胞模型,并对N2a细胞进行超声辐照(1 MHz,50 mW/cm2,脉冲重复频率1 kHz,辐照10 min)。将细胞分为对照组、超声对照(LIPUS)组、MPP+组和超声处理(MPP++LIPUS)组,并给予相应处理。采用CCK8法测定细胞活力,DCFH-DA染色法检测细胞内活性氧簇(ROS)水平,JC-1染色法检测线粒体膜电位变化,Annexin V-FITC/PI双染法检测细胞凋亡情况;以实时荧光定量PCR检测瞬时受体电位M7(TRPM7)的mRNA表达水平。结果 与对照组相比,MPP+组细胞存活率及线粒体膜电位显著降低,细胞内ROS水平和细胞凋亡明显增加(P均<0.01);LIPUS辐照后,经MPP+诱导的细胞存活率和线粒体膜电位显著上升,细胞内ROS水平及细胞凋亡明显降低(P均<0.01)。MPP+组TRPM7的mRNA表达下降,MPP++LIPUS组TRPM7表达显著升高(P均<0.01)。结论 LIPUS可增加MPP+诱导的N2a细胞存活率,减少线粒体膜电位损伤和ROS生成,抑制细胞凋亡,对MPP+的神经细胞毒性具有保护作用。
英文摘要:
      Objective To investigate whether low-intensity pulsed ultrasound (LIPUS) could attenuate the cytotoxicity of N2a induced by MPP+ and protect the cell model of Parkinson disease. Methods N2a cells were treated with MPP+ for 24 h to establish PD cell models. N2a cells were irradiated by ultrasound (1 MHz, 50 mW/cm2, pulse repetition frequency 1 kHz, irradiation for 10 min). Then the cells were divided into control group, LIPUS group, MPP+ group and MPP++LIPUS group and were processed accordingly. CCK8 assay was used to detect cell viability. The level of intracellular reactive oxygen species (ROS) was detected with DCFH-DA staining. Mitochondrial membrane potential was detected with JC-1 staining. Annexin VFITC/PI double staining method was used to observe cell apoptosis. The mRNA expression of TRPM7 was detected using real-time quantitative PCR. Results Compared with control group, cell viability and mitochondrial membrane potential of MPP+ group significantly decreased, the level of intracellular ROS and cell apoptosis rate significantly increased (all P<0.01). After irradiation with LIPUS, cell viability and mitochondrial membrane potential of MPP+-induced cells increased significantly, while ROS production and cell apoptosis rate decreased significantly (all P<0.01). The mRNA expression of TRPM7 in MPP+ group decreased, and the expression of TRPM7 in MPP++LIPUS group increased significantly (all P<0.01). Conclusion LIPUS can increase the survival rate of N2a cells induced by MPP+, reduce mitochondrial membrane potential damage and ROS production, inhibit apoptosis and protect the neuronal toxicity of MPP+.
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