Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (5): 774-780.doi: 10.1007/s40242-019-0006-5

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Electrochemical Detection of Superoxide Anion Released by Living Cells by Manganese(III) Tetraphenyl Porphine as Superoxide Dismutase Mimic

CUI Min1, REN Jujie1, WEN Xiaofang1, LI Na1, XING Yifei1, ZHANG Cong1, HAN Yuanyuan1, JI Xueping2   

  1. 1. Department of Chemistry, School of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, P. R. China;
    2. Department of Medical Chemistry, Hebei Medical University, Shijiazhuang 050017, P. R. China
  • Received:2019-10-17 Revised:2019-11-20 Online:2020-10-01 Published:2020-10-01
  • Contact: REN Jujie, JI Xueping E-mail:renjujie@hebust.edu.cn;jixueping@hebust.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.81872669) and the Scientific Research Projects of the Department of Education of Hebei Province, China(Nos.ZD2018037, QN2019140).

Abstract: Superoxide anion, one of the most active reactive oxygen species, is associated with the development of many diseases. So monitoring superoxide anion in living cells is of great significance for the pathological research of many diseases. In this work, a new non-enzymatic sensor for the detection of superoxide anion(O2·-) was developed, which was fabricated by the nanocomposites composed of manganese(III) tetraphenyl porphine(MnTPP) as super-oxide dismutase mimic and electrochemical reduced graphene oxide(ERGO) as electrode support material to modify the glassy carbon electrode(GCE). The electrochemical behavior of the fabricated electrode(MnTPP/ERGO/GCE) was performed by electrochemical impedance spectroscopy(EIS) and cyclic voltammetry(CV), which revealed that MnTPP/ERGO/GCE possessed good catalytic ability to the electrochemical reduction of O2·-. The MnTPP/ERGO/GCE showed excellent electroanalysis performance towards O2·- using the technique of differential pulse voltammetry(DPV) with a linear relationship in the range of 0.2-110.0 μmol/L, a sensitivity of 445 μA·L·mmol-1·cm-2 and a detection limit of 0.039 μmol/L(S/N=3). The real-time monitoring of O2·- from MCF-7 breast cancer cells stimulated by zymosan was realized in this work, which indicates that the MnTPP/ERGO/GCE hold potential application for electrochemical quantification of superoxide anions in biological applications.

Key words: Superoxide anion, Electrochemical sensor, Manganese(III) tetraphenyl porphine, Electrochemical reduced graphene oxide, MCF-7 breast cancer cell