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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