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Lu Y, Li X, Shi S, Liu X, Jia L, Shang L, Ma R, Wang H. Tungsten-based polyoxometalate nanoclusters with remarkable reactive oxygen species-scavenging activity efficiently quenched luminol-based electrochemiluminescence for sensitive detection of Her-2. Mikrochim Acta 2023; 191:21. [PMID: 38091113 DOI: 10.1007/s00604-023-06100-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/08/2023] [Indexed: 12/18/2023]
Abstract
This study aimed to develop a quenching-type electrochemiluminescence (ECL) immunosensor for human epidermal growth factor receptor (Her-2) detection. Firstly, Pd/NiFeOx nanoflowers decorated by in situ formation of gold nanoparticles (Au NPs) and 2D Ti3C2 MXene nanosheets were synthesized (AuPd/NiFeOx/Ti3C2) as carriers to load luminol and primary antibodies. Impressively, AuPd/NiFeOx/Ti3C2 with excellent peroxidase-like activity could accelerate the decomposition of the coreactant H2O2 generating more reactive oxygen species (ROSs) under the working potential from 0 to 0.8 V, resulting in highly efficient ECL emission at 435-nm wavelengths. The introduction of tungsten-based polyoxometalate nanoclusters (W-POM NCs) which exhibit remarkable ROSs-scavenging activity as secondary antibody labels could improve the sensitivity of immunosensors. The ZnO nanoflowers were employed to encapsulate minute-sized W-POM NCs, and polydopamine was self-polymerized on the surface of Zn(W-POM)O to anchor secondary antibodies. The mechanism of the quenching strategy was explored and it was found that W-POM NCs could consume ROSs by the redox reaction of W5+ resulting in W6+. The proposed ECL immunosensor displayed a wide linear response range of 0.1 pg·mL-1 to 50 ng·mL-1, and a low detection limit of 0.036 pg mL-1 (S/N = 3). The recoveries ranged from 93.9 to 99.4%, and the relative standard deviation (RSD) was lower than 10%. This finding is promising for the design of detecting new protein biomarkers.
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Affiliation(s)
- Yujia Lu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252000, Shandong, China
| | - Xiaojian Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252000, Shandong, China.
| | - Shanshan Shi
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252000, Shandong, China
| | - Xin Liu
- Jinan Shizhong District People's Hospital, Jinan, 250001, Shandong, China
| | - Liping Jia
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252000, Shandong, China
| | - Lei Shang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252000, Shandong, China
| | - Rongna Ma
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252000, Shandong, China
| | - Huaisheng Wang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252000, Shandong, China.
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