Abstract
We have studied the trans-membrane electron transfer in human red blood cells (RBCs) immobilized in a chitosan film on a glassy carbon electrode (GCE). Electron transfer results from the presence of hemoglobin (Hb) in the RBCs. The electron transfer rate (k s) of Hb in RBCs is 0.42 s−1, and <1.13 s−1 for Hb directly immobilized in the chitosan film. Only Hb molecules in RBCs that are closest to the plasma membrane and the surface of the electrode can undergo electron transfer to the electrode. The immobilized RBCs displayed sensitive electrocatalytic response to oxygen and hydrogen peroxide. It is believed that this cellular biosensor is of potential significance in studies on the physiological status of RBCs based on observing their electron transfer on the modified electrode.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (81001263, 21175075, 20875051 and 21075070), the Natural Science Foundation of Jiangsu Province (BK2009152, BK2011047), the Universities Natural Science Foundation of Jiangsu Province (10KJB150015), the Application Research Item of Nantong City (BK2011020) and A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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Chunmei Yu and Li Wang contributed equally to this work.
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Yu, C., Wang, L., Zhu, Z. et al. Trans-membrane electron transfer in red blood cells immobilized in a chitosan film on a glassy carbon electrode. Microchim Acta 181, 55–61 (2014). https://doi.org/10.1007/s00604-013-1060-1
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DOI: https://doi.org/10.1007/s00604-013-1060-1