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Chen Y, Zhang J, Liu R, Zhang Y, Zhou J, Liu H, Liu Y, Yan K, Qi Y, Liu E, Zhu X, Wang A. A highly sensitive electrochemical immunosensor based on rGO-PEI-Ag nanocomposites for the detection of tilmicosin. Food Chem 2024; 461:140009. [PMID: 39167943 DOI: 10.1016/j.foodchem.2024.140009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 05/14/2024] [Accepted: 06/06/2024] [Indexed: 08/23/2024]
Abstract
A label-free electrochemical immunosensor was developed to rapidly detect tilmicosin (TMC) residues in pork and milk. The immunosensor was constructed by immobilizing a high-affinity monoclonal antibody against TMC on an rGO-PEI-Ag nanocomposite-modified electrode. The rGO-PEI-Ag nanocomposites were prepared by mixing polyethyleneimine (PEI) modified reduced graphene oxide (rGO) with AgNO3 solution. The prepared rGO-PEI-Ag nanocomposites showed good redox activity and conductivity, as characterized by ultraviolet-visible spectroscopy (UV-Vis), transmission electron microscopy (TEM), and X-ray diffraction (XRD). During the preparation process, staphylococcal protein A (SPA) was added to targetedly bind the Fc segment of the monoclonal antibody. The immunosensor showed a low detection limit (LOD) of 0.0013 ng/mL, a linear range of 0.01-100 ng/mL, and recoveries ranging from 92.77 to 100.02% in pork and 92.26-101.23% in milk. Furthermore, the immunosensor exhibited good stability, reproducibility, and specificity in detecting TMC in pork and milk real samples.
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Affiliation(s)
- Yumei Chen
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Jialin Zhang
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China
| | - RuiRui Liu
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China
| | - Ying Zhang
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Jingming Zhou
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Hongliang Liu
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Yankai Liu
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Ke Yan
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China
| | - Yanhua Qi
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Enping Liu
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Xifang Zhu
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China
| | - Aiping Wang
- School of Life Sciences, Zhengzhou University, No. 100, Science Avenue, 450001, Zhengzhou City, Henan Province, People's Republic of China; Longhu Laboratory, No. 218, Ping AN Avenue, Zhengdong New District, 450046, Zhengzhou City, Henan Province, People's Republic of China.
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Elshenawy EA, El-Malla SF, Hammad SF, Mansour FR. Green microwave-prepared N and S Co-doped carbon dots as a new fluorescent nano-probe for tilmicosin detection. Talanta 2023; 265:124853. [PMID: 37379753 DOI: 10.1016/j.talanta.2023.124853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 06/30/2023]
Abstract
A straightforward, rapid, and selective fluorescent probe for determination of tilmicosin has been developed based on novel nitrogen and sulfur co-doped CDs (NS-CD). The NS-CDs were synthesized, for the first time, through green, simple one step microwave pyrolysis in only 90 s using glucose as carbon source and l-cysteine as nitrogen and sulfur source. This proposed synthesis method was energy-efficient and resulted in NS-CDs with high production yield (54.27 wt%) and narrow particle size distribution. Greenness of NS-CDs synthesis method was assessed using EcoScale and was proven to be excellent green synthesis. The produced NS-CDs were applied as a nano-probe for determination of tilmicosin in its marketed formulation and milk based on dynamic quenching mechanism. The developed probe showed a good performance for tilmicosin detection in marketed oral solution and pasteurized milk and linearity range of 9-180 μM and 9-120 μM, respectively.
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Affiliation(s)
- Eman A Elshenawy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy-Tanta University, Tanta, 31111, Egypt.
| | - Samah F El-Malla
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy-Tanta University, Tanta, 31111, Egypt.
| | - Sherin F Hammad
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy-Tanta University, Tanta, 31111, Egypt.
| | - Fotouh R Mansour
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy-Tanta University, Tanta, 31111, Egypt.
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Liu Z, Chen J, Zhao S, Pang Y, Shen X, Lei H, Li X. Immunochromatographic assays based on three kinds of nanoparticles for the rapid and highly sensitive detection of tylosin and tilmicosin in eggs. Mikrochim Acta 2021; 189:42. [PMID: 34971440 DOI: 10.1007/s00604-021-05151-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/12/2021] [Indexed: 01/03/2023]
Abstract
Three kinds of immunochromatographic assays (ICAs) are proposed for the highly sensitive and rapid determination of tylosin (TYL) and tilmicosin (TIM) in eggs based on colloidal gold (CG), latex microsphere (LM), and time-resolved fluorescent microsphere (TRFM). Three types of ICAs could tolerate the egg matrix via simple sample pretreatment and demonstrated high sensitivity for TYL and TIM with cut-off values of 6/6/3 μg/kg and 14/14/6 μg/kg, respectively. Furthermore, in a single-blind parallel study 20 egg samples were analyzed by the three developed ICAs and confirmed by LC-MS/MS. The results showed good consistency, and there were no false positive and false negative results in our three ICAs. Consequently, the proposed three ICAs offered rapid, highly sensitive, reliable, and selectable testing platforms for screening veterinary medicine or other small molecule contaminants.
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Affiliation(s)
- Zhiwei Liu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Jiayi Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Sijun Zhao
- China Animal Health and Epidemiology Center, 369 Nanjing Rd, Si Fang Qu, Qingdao, 266032, China
| | - Yimeng Pang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Xing Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Hongtao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Xiangmei Li
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China.
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Yu J, Wang M, Ahmed R, Zhao H, Cohen Stuart MA, Wang J. Facile Preparation of Tilmicosin-Loaded Polymeric Nanoparticle with Controlled Properties and Functions. ACS OMEGA 2020; 5:32366-32372. [PMID: 33376873 PMCID: PMC7758884 DOI: 10.1021/acsomega.0c04314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 10/14/2020] [Indexed: 05/08/2023]
Abstract
As one of the effective broad-spectrum antimicrobial and anti-inflammatory drugs, tilmicosin (TIM) is applied extensively in a wide range of veterinary treatments. However, the low bioavailability typically leads to overuse of TIM in practical applications, which can cause residual accumulation in the environment and contamination of foodstuffs. Here, we report a precipitation method that allows us to prepare TIM-loaded poly(methyl methacrylate-co-methacrylic acid) (P(MMA-co-MAA)) nanoparticles. Specifically, TIM and biocompatible P(MMA-co-MAA) are dissolved in methanol and then water is introduced as an antisolvent, which triggers the co-precipitation and leads to well-controlled nanoparticles. Depending on the drug/polymer mass ratio and the total concentration of drug and polymer, the formed nanoparticles display a tunable radius from 27 to 80 nm with a narrow size distribution, a high drug loading content, and a controlled release of TIM. The encapsulation does not interrupt the antibacterial function of TIM while reducing its cytotoxicity enormously. Moreover, the formed nanoparticles could be dried to powder through freeze-drying, and the redispersion of the particles hardly disturbs the particle size, size distribution, and drug loading content. Our study developed a facile and robust precipitation method for the controlled construction of TIM-loaded polymeric nanoparticles with tunable properties and functions, as well as improved biocompatibility, which shall improve the bioavailability of TIM and enhance the practical applications.
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