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Deng W, Wang D, Dai P, Hong Y, Xiong J, Duan L, Lu R, Wan J, Du H, Hammock BD, Yang W. Development of a sensitive direct competitive chemiluminescent enzyme immunoassay for gentamicin based on the construction of a specific single-chain variable fragment-alkaline phosphatase fusion protein. Microchem J 2024; 197:109706. [PMID: 38283367 PMCID: PMC10810264 DOI: 10.1016/j.microc.2023.109706] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
A sensitive chemiluminescent enzyme immunoassay (CLEIA) was established for the determination of gentamicin (GEN) residue levels in animal tissue. This assay is based on a fusion protein of single-chain variable fragment (scFv) and alkaline phosphatase (AP). Initially, VL and VH derived from anti-gentamicin monoclonal antibody were linked by a short peptide to construct a scFv. Subsequently, the constructed scFv sequence was accessed into the pLIP6/GN vector, and a soluble scFv-AP fusion protein was generated. The scFv-AP fusion protein was used to develop a direct competitive CLEIA (dcCLEIA) for the determination of gentamicin. In the dcCLEIA, the half inhibitory concentration (IC50) and limit of detection (LOD) were 1.073 ng/mL and 0.380 ng/mL, respectively. The average recoveries of gentamicin spiked in animal tissue samples ranged from 78% to 96%. These results showed a strong correlation with ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). The above results suggest that the anti-GEN scFv-AP fusion protein is suitable for detecting gentamicin residues in edible animal tissues.
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Affiliation(s)
- Weijie Deng
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Dan Wang
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Peng Dai
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yanping Hong
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Jianhua Xiong
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Luying Duan
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Ruimin Lu
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Jianchun Wan
- Technology Center of Nanchang Customs District, Nanchang 330038, China
| | - Huaying Du
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Bruce D. Hammock
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, CA 95616, United States
| | - Wuying Yang
- Key Laboratory of Agricultural Products Processing and Quality Control of Nanchang City/College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, CA 95616, United States
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