1.中国科学院上海应用物理研究所物理生物学研究室 上海光源生物成像中心 上海 201800
2.中国科学院大学 北京 100049
3.上海交通大学医学院附属仁济医院 上海 200127
[ "李敏, 女, 1990年5月出生, 2018年6月于中国科学院上海应用物理研究所获得博士学位, 从事电化学生物传感研究, E-mail: mlisinap@163.com", "LI Min (female) was born in May 1990 and received her doctor's degree in Shanghai Institute of Applied Physics, Chinese Academy of Sciences in June 2018, majoring in electrochemical biosensing. E-mail: mlisinap@163.com" ]
李茜, 副研究员, E-mail: liqian@sinap.ac.cn LI Qian, associate professor, E-mail: E-mail: liqian@sinap.ac.cn
左小磊, 研究员, E-mail: zuoxiaolei@sjtu.edu.cn ZUO Xiaolei, professor, E-mail: zuoxiaolei@sjtu.edu.cn
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李敏, 张月月, 刘江波, 等. 类神经细胞释放多巴胺的实时监测[J]. 辐射研究与辐射工艺学报, 2018,36(5):050201-6.
Min LI, Yueyue ZHANG, Jiangbo LIU, et al. Monitoring dopamine release from neuron-like cells[J]. Journal of Radiation Research and Radiation Processing, 2018,36(5):050201-6.
李敏, 张月月, 刘江波, 等. 类神经细胞释放多巴胺的实时监测[J]. 辐射研究与辐射工艺学报, 2018,36(5):050201-6. DOI: 10.11889/j.1000-3436.2018.rrj.36.050201.
Min LI, Yueyue ZHANG, Jiangbo LIU, et al. Monitoring dopamine release from neuron-like cells[J]. Journal of Radiation Research and Radiation Processing, 2018,36(5):050201-6. DOI: 10.11889/j.1000-3436.2018.rrj.36.050201.
采用火焰刻蚀法制备碳纤维纳米电极(CFNE),通过扫描电子显微镜对纳米电极直径进行表征,采用循环伏安法对纳米电极的电化学性能进行验证。选用差分脉冲伏安法验证了纳米电极对多巴胺(Dopamine,DA)的体外响应,最后采用膜片钳电压钳模式,施加电压700 mV(Ag/AgCl为参比),对高分化的PC12细胞施加高钾刺激,实时监测DA的释放。结果表明:CFNE的直径可低至~100 nm,电极表面存在优良的非线性扩散特性;CFNE在体外对DA有灵敏的响应,检测限达10 pmol/L;对PC12细胞高钾刺激后,实时监测到PC12细胞单个释放位点的DA释放过程。
A carbon fiber nanoelectrode (CFNE) was prepared using the flame-etching method. Scanning electron microscopy and cyclic voltammetry were used to characterize its diameter and the electrochemical properties, respectively. Differential pulse voltammetry was used to detect dopamine (DA) ,in vitro,. A patch clamp in the voltage-clamp mode was used to monitor the release of DA from PC12 cells after stimulation with an elevated K,+, solution, maintaining the voltage at 700 mV. The results showed that CFNE was successfully prepared with a diameter of ~100 nm, and excellent nonlinear diffusion behavior was observed on the nanoelectrode surface. Further, the nanoelectrode showed excellent response to DA with the limit of detection of 10 pmol/L. After PC12 cells were stimulated with the elevated K,+, solution, the DA release process of PC12 cells at a single release site was monitored in real time.
碳纤维纳米电极类神经细胞单释放位点多巴胺实时监测
Carbon fiber nanoelectrodeNeuron-like cellSingle release siteDopamineReal-time monitoring
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