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High-bioactivity microfluidic immunosensing platform for electrochemiluminescence determination of CYFRA 21–1 with the introduction of Fe3O4@Cu@Cu2O

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Abstract

Relying on the electrochemiluminescence (ECL) and microfluidic technology, an immunosensor chip with high bioactivity was designed for sensitive determination of cytokeratin 19 fragment 21–1 (CYFRA 21–1). The mesoporous nanomaterial Fe3O4@Cu@Cu2O as the co-reaction accelerator was used to catalyze the S2O82− to produce more SO4•− to achieve the amplification of the ECL signal. In fact, the generating of SO4•− could not only be done with the aid of the reversible cycles of Fe2+ and Fe3+ and Cu+ and Cu2+, but could be achieved also through the catalase-like function of Fe3O4. What is more, it has also been proved that Fe3O4@Cu@Cu2O exhibited better catalytic performance than single Fe3O4, Cu2O, and Cu@Cu2O, which supported its application in this system. In addition, a portable microfluidic immunosensor chip for CYFRA 21–1-sensitive determination was assembled, which showed high selectivity, sensitivity, and strong universality in clinical cancer screening and diagnosis. It should be noted that HWRGWVC (HWR) was introduced as the antibody fixator to improve the incubation and binding efficiency of the antibody, which increased the ECL intensity and improved the sensitivity of the immunosensor. This strategy provided a new idea for cancer identification and diagnosis in clinical medicine.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (No. 51904114), Shandong Provincial Natural Science Foundation (No. ZR2020QB097), Jinan Scientific Research Leader Workshop Project (2019GXRC027), Special Foundation for Taishan Scholar Professorship of Shandong Province.

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Authors and Affiliations

  1. Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, Shandong, China

    Tao Feng, Xianzhen Song, Kun Xu, Shoufeng Wang, Nuo Zhang, YuYang Li, Hongmin Ma & Qin Wei

  2. Logistics Management Center of Yantai Customs District, Yantai, Shandong, China

    Wei Wang

  3. Shandong University of Technology, West Campus No.12 Zhangzhou Road, Zibo, 255049, Shandong, China

    Nuo Zhang

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  1. Tao Feng
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  2. Xianzhen Song
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  3. Wei Wang
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  4. Kun Xu
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  5. Shoufeng Wang
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Feng, T., Song, X., Wang, W. et al. High-bioactivity microfluidic immunosensing platform for electrochemiluminescence determination of CYFRA 21–1 with the introduction of Fe3O4@Cu@Cu2O. Microchim Acta 189, 336 (2022). https://doi.org/10.1007/s00604-022-05436-w

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