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Wang R, Gong M, Liu Y, Zhu W, Zhang K, Zhao Y, Yin C, Liu Y, Wang J, Wan Y. Development of a highly sensitive colloidal gold semiquantitative method for the determination of difenoconazole residues in citrus. Front Nutr 2024; 11:1341219. [PMID: 38590829 PMCID: PMC10999568 DOI: 10.3389/fnut.2024.1341219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/28/2024] [Indexed: 04/10/2024] Open
Abstract
Introduction Difenoconazole (DIFE) is a common pesticide used in citrus cultivation; excessive intake can cause neurological damage to the organism, and the existing colloidal gold immunochromatographic test strips cannot meet the requirements for the detection of citrus samples. Methods Difenoconazole test strip was prepared based on the colloidal gold immunochromatographic technique (GICT), and its application in citrus samples was investigated; with colloidal gold (CG) as the probe, the optimization of GICT parameters, and the determination of reaction method, the immunochromatographic test strips for the detection of DIFE in citrus was developed, and the limit of detection (LOD), specificity, accuracy, and stability of the test strips were verified. Results The results showed that the visual detection limit of the prepared colloidal gold immunochromatographic test strips was 0.2 mg/kg and the quantitative range was 0.06-0.6 mg/kg, and the test strips could specifically identify DIFE and have no cross-reaction with other common triazole pesticides. The detection method established in this study was verified by the GC-MS method, and the detection results achieved good consistency (R2 > 0.98). Conclusion The test strips developed in this study have good performance and can be used for highly sensitive detection of citrus samples.
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Affiliation(s)
- Ruobing Wang
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Min Gong
- Hainan Inspection and Detection Center of Modern Agriculture, Haikou, Hainan, China
| | - Yang Liu
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Weiran Zhu
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Kai Zhang
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Yidi Zhao
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Chen Yin
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Yuan Liu
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Jian Wang
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Yuping Wan
- Beijing Kwinbon Technology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
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Yang N, Liu K, Zhang W, Li Y, Shen S, Lu C, Xu K, Peng W, Deng C, Chen M, Yang L, Lai S. Predicting late-onset preeclampsia by detecting ELABELA content using an immunochromatographic colloidal gold test strip: Blood ELABELA content predicts the risk of pre-eclampsia. J Clin Hypertens (Greenwich) 2023; 25:932-942. [PMID: 37746730 PMCID: PMC10560972 DOI: 10.1111/jch.14724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/18/2023] [Accepted: 08/18/2023] [Indexed: 09/26/2023]
Abstract
Preeclampsia is a pregnancy disorder that seriously affects the outcome of mothers and infants and lacks effective prediction and diagnosis methods. ELABELA is the second endogenous ligand of the apelin receptor (APJ) and is associated with the pathogenesis of preeclampsia. In a previous study, the authors found that the downregulation of ELABELA expression is closely related to late-onset preeclampsia, which may be a marker for the clinical diagnosis of late-onset preeclampsia. In this study, the authors again collected 120 maternal blood samples, including 60 pregnant women with a medical diagnosis of late-onset preeclampsia. ELISA results showed that the serum ELABELA concentration in late-onset preeclampsia pregnant women (12.57 ± 7.77 ng/mL) was significantly lower than that in normal pregnant women (36.99 ± 23.58 ng/mL), which was consistent with previously reported results. Therefore, the authors used an ELABELA monoclonal antibody to label four colloidal gold nanoparticles with different diameters (15, 30, 55, and 150 nm) and developed a transverse-flow immunochromatographic band for the rapid and accurate detection of serum ELABELA levels. The strip test shows that colloidal gold with a diameter of 30 nm can be used as a good ELABELA detection marker and had more than 90% positive detection effect. Therefore, the authors hope that the colloidal gold strip with ELABELA as the diagnostic index developed by us will be popularized and applied in clinical diagnosis.
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Affiliation(s)
- Na Yang
- School of Life SciencesNanjing Normal UniversityNanjingChina
| | - Kangsheng Liu
- Department of Clinical LaboratoryWomen's Hospital of Nanjing Medical UniversityNanjing Maternity and Child Health Care HospitalNanjingChina
| | - Wenli Zhang
- School of Life SciencesNanjing Normal UniversityNanjingChina
| | - Ying Li
- Pan'an Mason Medical Technology Co., LTD.JinhuaChina
| | - Suqin Shen
- Department of Clinical LaboratoryWomen's Hospital of Nanjing Medical UniversityNanjing Maternity and Child Health Care HospitalNanjingChina
| | - Chuanchuan Lu
- Department of Obstetrics and GynecologyWomen's Hospital of Nanjing Medical UniversityNanjing Maternity and Child Health Care HospitalNanjingChina
| | - Kai Xu
- School of Life SciencesNanjing Normal UniversityNanjingChina
| | - Wei Peng
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious DiseasesKingMed School of Laboratory MedicineGuangzhou Medical UniversityGuangzhouChina
| | - Cheng Deng
- School of Life SciencesNanjing Normal UniversityNanjingChina
| | - Meilin Chen
- Pan'an County maternal and Child Health Hospital, Clinical LaboratoryJinhuaChina
| | - Lindong Yang
- Department of Obstetrics & GynecologyAffiliated Jinling HospitalMedical School of Nanjing UniversityNanjingChina
| | - Shanshan Lai
- School of Life SciencesNanjing Normal UniversityNanjingChina
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Jiang H, Xu X, Song S, Wu A, Liu L, Kuang H, Xu C. A monoclonal antibody-based colloidal gold immunochromatographic strip for the analysis of novobiocin in beef and chicken. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1053-1064. [PMID: 35486679 DOI: 10.1080/19440049.2022.2048089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In this study, a monoclonal antibody (mAb) 1G5 against novobiocin with high sensitivity and specificity was prepared from a newly-designed hapten. According to the results of an indirect competitive enzyme-linked immunosorbent assay (ic-ELISA), the 50%-inhibitory concentration of the anti-novobiocin mAb was 6.9 ng/mL and the cross-reactivity was less than 0.1% to its analogues. Furthermore, a rapid colloidal gold immunochromatographic assay (ICA) was successfully developed for the determination of novobiocin in spiked samples. Two calibration curves were established respectively, for beef and chicken samples. The ICA results showed a visual colorimetric value of 50 ng/mL and a cut-off value of 300 ng/mL in beef samples. The ICA results of chicken samples were almost the same as that of beef. When quantitative detection was performed using a strip reader, the detection ranges for quantitative analysis in beef and chicken were 23.7-287.5 and 19.7-263.8 µg/kg respectively. Recoveries were between 82.7 and 95.3% for beef samples with the coefficient of variation (CV) ranging from 2.5 to 5.1%. Recoveries were in the range of 89.6-105.5% with the CV ranging from 2.9% to 6.3% for chicken samples. Importantly, these results from the ICA were highly consistent with the results obtained by LC-MS/MS. Therefore, this ICA could be used as an alternative means for the rapid determination of NOV in a large number of beef and chicken samples.
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Affiliation(s)
- Hongtao Jiang
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Xinxin Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Shanshan Song
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Aihong Wu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Liqiang Liu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Hua Kuang
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
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Xiang T, Xu X, Xu L, Liu L, Xu C, Kuang H. Gold-based immunochromatographic strip assay for detecting dimethomorph in vegetables. NEW J CHEM 2022. [DOI: 10.1039/d1nj05652b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Gold-based immunochromatographic strip assay for detecting dimethomorph in vegetables.
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Affiliation(s)
- Tongyue Xiang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Xinxin Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Liguang Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Liqiang Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Chuanlai Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Hua Kuang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
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Xu X, Ge W, Suryoprabowo S, Guo X, Zhu J, Liu L, Xu C, Kuang H. Fluorescence-based immunochromatographic test strip for the detection of hyoscyamine. Analyst 2021; 147:293-302. [PMID: 34907412 DOI: 10.1039/d1an01973b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Hyoscyamine (HSM), which acts as an antagonist of the acetylcholine muscarinic receptor and can induce a variety of distinct toxic syndromes in mammals (anti-cholinergic poisoning), is hazardous to human health. Therefore, it is urgent to develop a rapid, sensitive, and cost-effective method to determine HSM. A fluorescent microsphere based immunochromatographic assay was developed for this analyte and gold nanoparticles (AuNPs) were used as a comparison. A monoclonal antibody against HSM was prepared with a 50% inhibition concentration (IC50) of 1.17 ng mL-1, with no cross-reactivity with five drugs. Under optimized conditions, the cut off limits using the fluorescence-labeled monoclonal antibody strips were 10 ng mL-1 in 0.01 M PBS and 20 ng mL-1 in pork, pig urine, and honey samples, and the assay could be completed within 10 min. In comparison with a AuNP immunochromatographic assay, the developed method offered a higher coupling rate and lower amounts of antibodies. This approach could be used for simple, sensitive and rapid screening, and is suitable for on-site screening applications.
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Affiliation(s)
- Xinxin Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Wenliang Ge
- Wuxi No. 2 People's Hospital, Wuxi, 214002, Jiangsu, 214122, People's Republic of China
| | - Steven Suryoprabowo
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Xin Guo
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Jianping Zhu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Liqiang Liu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Hua Kuang
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
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Sun Y, Song S, Wu A, Liu L, Kuang H, Xu C. A fluorescent paper biosensor for the rapid and ultrasensitive detection of zearalenone in corn and wheat. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3970-3977. [PMID: 34528940 DOI: 10.1039/d1ay01149a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Zearalenone (ZEN) is a kind of estrogen-like mycotoxin which contaminates primary crops and their products under natural conditions and becomes a serious hazard to human health. In this study, we prepared a sensitive and specific anti-ZEN monoclonal antibody (mAb) belonging to the IgG2b subclass, with a 50%-inhibitory concentration of 0.034 ng mL-1. A lateral flow fluorescence microsphere immunochromatographic test strip (FM-ICTS) for the rapid and ultrasensitive detection of zearalenone in corn and wheat samples was developed based on this mAb. After optimizing experimental parameters, the visual limit of detection (LOD) of the strip assay in both corn and wheat samples was 2.5 ng mL-1, and the cut-off value was 25 ng mL-1. The LOD was calculated to be 0.68 ng mL-1 in corn samples and 0.48 ng mL-1 in wheat samples. Recovery experiments showed that the test results of the strip were consistent with those of ic-ELISA. As a result, this FM-ICTS assay is reliable, simple and sensitive, and can be used for rapid detection of ZEN in corn and wheat.
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Affiliation(s)
- Yunjie Sun
- State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Shanshan Song
- State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Aihong Wu
- State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Liqiang Liu
- State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Hua Kuang
- State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Chuanlai Xu
- State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, People's Republic of China.
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