1
|
Sun D, Liu Y, Jin Z, Xu B, Jin Y, Zhao Q, He Y, Li J, Zhang Y, Cui Y. Preparation of limonin monoclonal antibody and establishment of a sensitive icELISA for analyzing limonin in citrus and herbal samples. Food Chem 2024; 447:138989. [PMID: 38492297 DOI: 10.1016/j.foodchem.2024.138989] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/26/2024] [Accepted: 03/08/2024] [Indexed: 03/18/2024]
Abstract
Limonin is an intensely bitter and highly oxidized tetracyclic triterpenoid secondary metabolite, which is abundant in the Rutaceae and Meliaceae, especially in Citrus. In order to detect limonin content in complex substrates such as citrus and traditional Chinese medicine, monoclonal antibodies specifically recognizing limonin were prepared and an indirect competitive enzyme-linked immunosorbent assay (icELISA) was established. The median inhibition concentration (IC50) was 5.40 ng/mL and the linear range was 1.25-23.84 ng/mL. The average recoveries from citrus peel and pulp samples were 95.9%-118.8% and 77.5%-113.1%, respectively. Moreover, the contents of limonin in 6 citrus samples and 4 herbal samples were analyzed by icELISA and UPLC-MS, and the results of the two methods were consistent. This validation is sufficient to demonstrate that the developed immunoassay is applicable for the detection of limonin in citrus and herbal samples and has the advantage of high efficiency, sensitivity, and convenience.
Collapse
Affiliation(s)
- Di Sun
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Yifan Liu
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Zihui Jin
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Bo Xu
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Yaqi Jin
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Qiyang Zhao
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Yue He
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Jing Li
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Yaohai Zhang
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Yongliang Cui
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; National Citrus Engineering Research Center, Chongqing 400712, PR China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China.
| |
Collapse
|
2
|
Peng Y, Jin Y, Sun D, Jin Z, Zhao Q, He Y, Jiao B, Cui Y, Zhang Y. Monoclonal antibody-based icELISA for sensitive monitoring fenpyroximate residue by hydrolysis conversion. Talanta 2024; 268:125288. [PMID: 37866304 DOI: 10.1016/j.talanta.2023.125288] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 09/16/2023] [Accepted: 10/06/2023] [Indexed: 10/24/2023]
Abstract
Fenpyroximate is a systemic phenoxy pyrazole acaricide applied worldwide to prevent and control various phytophagous mites and has high activity against young mites, with residues increasingly being found in ecological environment and agricultural products. To identify its residues, four haptens of fenpyroximate were designed and an indirect competitive enzyme-linked immunosorbent assay (icELISA) based on monoclonal antibodies (2G4C7) was developed. Because the icELISA had higher sensitivity to the hydrolysate (Hapten A) of fenpyroximate, a method for indirectly determining the concentration of fenpyroximate was established by measuring the content of Hapten A. The assay had a working range of 0.07-1.49 ng/mL and a half-maximal inhibitory concentration (IC50) of 0.34 ng/mL. It showed average recoveries of 77.0%-105.4 %, 72.3%-106.4 % in citrus and apple samples, respectively. The icELISA and UPLC-MS/MS test results for samples of various citrus cultivars are remarkably consistent. These results and data represent the icELISA is suitable and applicable for detecting fenpyroximate residuals in fruit and vegetable samples.
Collapse
Affiliation(s)
- Yilin Peng
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Yaqi Jin
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Di Sun
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Zihui Jin
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Qiyang Zhao
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Yue He
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Bining Jiao
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Yongliang Cui
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China.
| | - Yaohai Zhang
- Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400712, China; National Citrus Engineering Research Center, Chongqing, 400712, China; Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing, 400712, China.
| |
Collapse
|
3
|
Liang Q, Chen C, Xu W, Zhang N, Yang J, Song W, Cai H, Hou R, Li H, Zhang X. A Comparable icELISA and Lateral Flow Immunoassay for the Sensitive and Rapid Detection of 4,4'-Dinitrocarbanilide in Chicken. Toxics 2023; 11:628. [PMID: 37505593 PMCID: PMC10385411 DOI: 10.3390/toxics11070628] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/10/2023] [Accepted: 07/15/2023] [Indexed: 07/29/2023]
Abstract
4,4'-dinitrocarbanilide (DNC) is a key component and marker residue of nicarbazin, which forms residues in edible tissue and then causes nephrotoxicity and hepatotoxicity in humans if used excessively. To simplify sample preparation and monitor the DNC rapidly and accurately, a comparable icELISA and lateral flow immunoassay (LFIA) was developed in this study. Briefly, the reaction parameters were explored for improving the sensitivity of icELISA and LFIA. Under the optimal conditions, methanol was selected as the extracting solvent for DNC in chicken, and 20- and 10-fold dilutions of sample extraction eliminated the matrix effect for icELISA and LFIA, separately. After sample pretreatment, the analysis properties of icELISA and LFIA were compared. The limit of detection of icELISA for DNC was 0.8 μg/kg, and the visual and quantitative limits of detection of LFIA were 8 and 2.5 μg/kg. Compared with icELISA, LFIA showed lower sensitivity but obvious advantages in terms of matrix tolerance and detection time (within 15 min). The sensitivity, specificity, and accuracy of the developed assays satisfied the detection requirement even if using simple sample pretreatment. This comparable icELISA and LFIA provided mutual verifiability methods for the accurate detection of DNC in chicken.
Collapse
Affiliation(s)
- Qianxin Liang
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Chen Chen
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Wenqing Xu
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Ning Zhang
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Jielin Yang
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Wei Song
- Hefei Customs District Technical Center, Anhui Key Lab of Analysis and Detection for Food Safety, Hefei 230022, China
| | - Huimei Cai
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Ruyan Hou
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Hongfang Li
- Animal-Derived Food Safety Innovation Team, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China
| | - Xiya Zhang
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China
| |
Collapse
|
4
|
Zhang X, Li Z, Mao Y, Dang M, Huang X, Wang Z, Yang H, Bai Y, Zhang H. Production of high-affinity monoclonal antibody and development of immunoassay for 3-methyl-quinoxaline-2-carboxylic acid detection in swine muscle and liver. Food Chem 2023; 407:135175. [PMID: 36521388 DOI: 10.1016/j.foodchem.2022.135175] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 12/01/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
Production of high-affinity and specific antibodies to small molecules with molecular weight (MW) lower than 200 Da is challenging. Here, we designed a novel hapten, named hapten H6, for the detection of 3-methyl-quinoxaline-2-carboxylic acid (MQCA, MW of 189 Da), a residual marker of olaquindox, one of important veterinary antibiotics. The hapten H6 maintained all structural features of MQCA, especially in mulliken atomic charge distribution. Then, a monoclonal antibody (mAb) named 8C9 was obtained with an IC50 value of 0.2 µg/L, yielding a 15.5- to 88.5-fold improvement compared to previously prepared specific antibodies against MQCA. In addition, mAb 8C9 exhibited ignorable cross-reactivity with other structural analogs. Finally, a highly sensitive and specific indirect competitive ELISA based on mAb 8C9 was developed for the detection of MQCA in swine muscle and liver samples with limit of detection values of 0.04 µg/kg and 0.09 µg/kg, respectively.
Collapse
Affiliation(s)
- Xiya Zhang
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, 63 Nongye Road, Zhengzhou, Henan 450002, China
| | - Zizhe Li
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, 63 Nongye Road, Zhengzhou, Henan 450002, China
| | - Yexuan Mao
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, 63 Nongye Road, Zhengzhou, Henan 450002, China
| | - Meng Dang
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, 63 Nongye Road, Zhengzhou, Henan 450002, China
| | - Xianqing Huang
- Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control, College of Food Science and Technology, Henan Agricultural University, 63 Nongye Road, Zhengzhou, Henan 450002, China
| | - Zhanhui Wang
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing 100193, China
| | - Huijuan Yang
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing 100193, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100193, China
| | - Yuchen Bai
- School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi 030001, China.
| | - Huahai Zhang
- College of Forestry, Northwest A&F University, Yangling, China.
| |
Collapse
|
5
|
Liu D, Lv X, Cong Y, Li L. A Method for Screening Proteases That Can Specifically Hydrolyze the Epitope AA83-105 of α(s1)-Casein Allergen. Foods 2022; 11. [PMID: 36359934 DOI: 10.3390/foods11213322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/08/2022] [Accepted: 10/11/2022] [Indexed: 11/17/2022] Open
Abstract
Milk protein hydrolysates are common in infant formula, but some of them retain allergenicity due to incomplete hydrolysis of the epitopes for milk allergens. This study explored a method for screening proteases that could specifically hydrolyze the epitope of αs1-casein allergen. Firstly, the αs1-casein epitope AA83-105 was synthesized by the solid-phase synthesis method. Then, after purification and identification, the complete antigen was prepared through coupling with bovine serum albumin (BSA) and was used to raise monoclonal antibodies (mAb) in BALB/c mice. Additionally, an indirect competitive-enzyme-linked immunosorbent assay (icELISA) was established. The mAb raised against αs1-casein protein was used as a control. The results showed that the purity of the synthetic epitope was >90%, and the coupling rate with BSA was 6.31. The mAb subtype is IgG1, with a titer of 1:320,000. The mAb reacted specifically with αs1-casein but did not cross-react with soybean protein. The linear regression equation of the competitive inhibition curve was y = −9.22x + 100.78 (R2 = 0.9891). The detection limit of icELISA method was more sensitive, and the method showed good accuracy and repeatability. The amounts of antigen residues in papain protease hydrolysates were relatively small, and the epitope fragment was detected in papain hydrolysate via mass spectrometry. This study provides ideas and methods for screening proteases that specifically hydrolyze the epitopes of milk allergens and also provides a superior foundation for the development of an advanced hypoallergenic formula.
Collapse
|
6
|
Zhao J, Zhang Y, Zhao Q, He Y, Li Z, Chen A, Wang C, Wang B, Jiao B, Cui Y. A sensitive and practical ELISA for analyzing naringenin in pummelo and herb samples. Food Chem 2021; 362:130223. [PMID: 34091161 DOI: 10.1016/j.foodchem.2021.130223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 11/27/2022]
Abstract
Naringenin, a flavonoid compound found in pummelo, is a key biological active compound in some traditional Chinese medicines, including Citri reticulatae pericarpium, Citri reticulatae pericarpium viride, Aurantii fructus immaturus, and Aurantii fructus. These Chinese medicinal preparations are the peels or immature fruits of certain citrus species. Aiming at detecting naringenin in complex matrices such as pummelo and traditional Chinese medicines, we put forward a sensitive and practical indirect competitive enzyme-linked immunosorbent assay (icELISA) based on anti-naringenin monoclonal antibodies (anti-Nar-mAbs). The median inhibitory concentration (IC50) was 4.43 ng/mL, and the working range was 1.15-15.81 ng/mL. The findings of the icELISA for the analysis of naringenin in pummelo and herb samples had a good correlation with the ultra performance liquid chromatography (UPLC) methodology and showed good accuracy and reproducibility. These data demonstrated that the developed icELISA is reliable, accurate, and suitable for detecting naringenin in pummelo and traditional Chinese medicines.
Collapse
Affiliation(s)
- Jing Zhao
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Yaohai Zhang
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Qiyang Zhao
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Yue He
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Zhixia Li
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Aihua Chen
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Chengqiu Wang
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Baomin Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Bining Jiao
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China.
| | - Yongliang Cui
- Laboratory of Quality & Safety Risk Assessment for Citrus Products (Chongqing), Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, China.
| |
Collapse
|
7
|
Chen Y, Zhao K, Huang J, Li M, Sun X, Li J. Detection of salinomycin and lasalocid in chicken liver by icELISA based on functional bispecific single-chain antibody (scDb) and interpretation of molecular recognition mechanism. Anal Bioanal Chem 2021; 413:7031-7041. [PMID: 34661725 DOI: 10.1007/s00216-021-03666-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 09/06/2021] [Accepted: 09/14/2021] [Indexed: 10/20/2022]
Abstract
Salinomycin (SAL) and lasalocid (LAS) are widely used as ionophore antibiotics for coccidiosis control. However, their common use as feed additives has led to the occurrence of feed cross-contamination, which has toxic effects on non-target animals. There have been few reports on multiple-residue detection for SAL and LAS in recent years. In this study, two single-chain antibody fragments (scFvs) capable of specifically recognizing SAL and LAS were constructed. Using LAS-scFv and SAL-scFv as parent antibodies, a complete bispecific single-chain diabody (scDb) against both LAS and SAL was built using splicing by overlap extension polymerase chain reaction (SOE-PCR). In addition, the key amino acid sites and interaction energy of antibody variable regions for small-molecule recognition were preliminarily studied by homology modeling and molecular docking. Finally, IC50 values of 12.9 and 8.6 ng/mL, with a linear range of 6.9-24.0 and 4.7-16.0 ng/mL, were obtained for LAS-scFv and SAL-scFv, respectively. An indirect competitive enzyme-linked immunosorbent assay (icELISA) method was established using scDb to obtain an IC50 of 3.5 ng/mL for LAS and 4.1 ng/mL for SAL, which showed better sensitivity and specificity than those of the parent scFv antibodies. The recoveries of LAS and SAL in chicken liver were 89.2-92.7%(CV<4.7%) and 88.6-90.2% (CV<6.8%)), respectively.
Collapse
Affiliation(s)
- Yingxian Chen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, 100193, Beijing, People's Republic of China
| | - Kunxia Zhao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, 100193, Beijing, People's Republic of China
| | - Jingjie Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, 100193, Beijing, People's Republic of China
| | - Miao Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, 100193, Beijing, People's Republic of China
| | - Xiaojuan Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, 100193, Beijing, People's Republic of China
| | - Jiancheng Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory of Food Quality and Safety, 100193, Beijing, People's Republic of China.
| |
Collapse
|
8
|
Yu X, Zhang X, Xu J, Guo P, Li X, Wang H, Xu Z, Lei H, Shen X. Generation of recombinant antibodies by mammalian expression system for detecting S-metolachlor in environmental waters. J Hazard Mater 2021; 418:126305. [PMID: 34118539 DOI: 10.1016/j.jhazmat.2021.126305] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/01/2021] [Accepted: 06/01/2021] [Indexed: 05/24/2023]
Abstract
Current immunoassays for herbicide detection are usually based on polyclonal or monoclonal antibodies (MAbs) raised in animals. The mammalian expression system allows the procurement of specific and highly sensitive antibodies, avoiding animal immunization. In this study, S-metolachlor-specific IgG vectors bearing either Thosea asigna virus 2A or internal ribosome entry site (S-T2A or S-IRES) and single-chain variable fragment (scFv) vectors were designed and expressed. The recombinant antibodies (RAbs) were characterized by indirect competitive enzyme-linked immunosorbent assays (icELISA). The results showed that full-length RAbs exhibited significantly better performance than scFv, and both bicistronic vectors expressed antibodies of correct size, while RAb S-T2A elicited a higher yield than RAb S-IRES. Further analyses showed that RAb S-T2A and RAb S-IRES exhibited comparable reactivities and specificities to the parental MAb, with IC50 values of 3.44, 3.89 and 3.37 ng/mL, respectively. Finally, MAb- and RAb-based icELISAs were established for the determination of S-metolachlor in environmental waters. The recoveries were in the range of 73.0-128.1%, and the coefficients of variation were mostly below 10%. This article describes the production of RAbs for S-metolachlor from mammalian cells for the first time and paves the way to develop RAb-based immunoassays for monitoring herbicide residues in the environment.
Collapse
Affiliation(s)
- Xiaoting Yu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Xu Zhang
- Guangzhou Editgene Co., Ltd., Guangzhou 510642, China; College of Life Science and Engineering, Foshan University, Foshan 528225, China
| | - Jingjing Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Pengyan Guo
- 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
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Zhenlin Xu
- 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.
| | - Xing Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| |
Collapse
|
9
|
Nuntawong P, Horikawa T, Ochi A, Wada S, Tsuneura Y, Tanaka H, Sakamoto S, Morimoto S. A monoclonal antibody-based indirect competitive enzyme-linked immunosorbent assay to quantify swertiamarin and related compounds in Swertia japonica Makino. Phytochem Anal 2021; 32:512-520. [PMID: 33021012 DOI: 10.1002/pca.2999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 08/27/2020] [Accepted: 09/01/2020] [Indexed: 06/11/2023]
Abstract
INTRODUCTION Swertia japonica Makino (S. japonica) has a long history of use as a folk medicine, and it is one of the three essential Japanese folk medicines. S.japonica has been reported to have various biological activities. The biologically active secoiridoid glycoside swertiamarin (SM) has been isolated from S. japonica. The efficacy of this plant is attributed to SM and related secoiridoid glycosides. To control the quality of S. japonica for medicinal use, a method for the determination of SM and other secoiridoid glycosides in the plant is needed. OBJECTIVE To produce an anti-SM monoclonal antibody (MAb) and develop an indirect competitive enzyme-linked immunosorbent assay (icELISA) for S. japonica standardisation and quality control. METHODOLOGY SM was conjugated to cationised bovine serum albumin (cBSA), and the SM-cBSA conjugate was used to immunise BALB/c mice. Splenocytes from the immunised mice were then fused with SP2/0 myeloma cells to produce hybridoma cells that expressed anti-SM MAb. RESULTS The developed icELISA was sufficiently sensitive and had a quantitative range of 0.78 to 12.5 μg/mL. Coefficients of variation below 10% indicated good repeatability. Recoveries in a spike and recovery assay ranged from 91.84% to 115.50%, which confirmed that the icELISA was accurate. The SM content measured using the icELISA was in agreement with the results of a high-performance liquid chromatography-ultraviolet (HPLC-UV) assay. CONCLUSION The icELISA is suitable for the high-throughput analysis of SM and other secoiridoid glycosides in S. japonica. The method is fast, economical, and reliable for S. japonica quality control.
Collapse
Affiliation(s)
- Poomraphie Nuntawong
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Taiki Horikawa
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Akihiro Ochi
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Shinji Wada
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Yumi Tsuneura
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Hiroyuki Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Seiichi Sakamoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Satoshi Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan
| |
Collapse
|
10
|
Wang Y, Wang X, Zhang H, Fotina H, Jiang J. Preparation and Characterization of Monoclonal Antibodies with High Affinity and Broad Class Specificity against Zearalenone and Its Major Metabolites. Toxins (Basel) 2021; 13:383. [PMID: 34071768 DOI: 10.3390/toxins13060383] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 12/21/2022] Open
Abstract
This study aimed to detect and monitor total Zearalenone (ZEN) and its five homologs (ZENs) in cereals and feed. The monoclonal antibodies (mAbs) with a high affinity and broad class specificity against ZENs were prepared, and the conditions of a heterologous indirect competitive ELISA (icELISA) were preliminarily optimized based on the ZEN mAbs. The immunogen ZEN-BSA was synthesized using the oxime active ester method (OAE) and identified using infrared (IR) and ultraviolet (UV). The coating antigen ZEN-OVA was obtained via the 1,4-butanediol diglycidyl ether method (BDE). Balb/c mice were immunized using a high ZEN-BSA dose with long intervals and at multiple sites. A heterologous indirect non-competitive ELISA (inELISA) and an icELISA were used to screen the suitable cell fusion mice and positive hybridoma cell lines. The ZEN mAbs were prepared by inducing ascites in vivo. The standard curve was established, and the sensitivity and specificity of the ZEN mAbs were determined under the optimized icELISA conditions. ZEN-BSA was successfully synthesized at a conjugation ratio of 17.2:1 (ZEN: BSA). Three hybridoma cell lines, 2D7, 3C2, and 4A10, were filtered, and their mAbs corresponded to an IgG1 isotype with a κ light chain. The mAbs titers were between (2.56 to 5.12) × 102 in supernatants and (1.28 to 5.12) × 105 in the ascites. Besides, the 50% inhibitive concentration (IC50) values were from 18.65 to 31.92 μg/L in the supernatants and 18.12 to 31.46 μg/L in the ascites. The affinity constant (Ka) of all of the mAbs was between 4.15 × 109 and 6.54 × 109 L/mol. The IC50 values of mAb 2D7 for ZEN, α-ZEL, β-ZEL, α-ZAL, β-ZAL and ZAN were 17.23, 16.71, 18.27, 16.39, 20.36 and 15.01 μg/L, and their cross-reactivities (CRs, %) were 100%, 103.11%, 94.31%, 105.13%, 84.63%, and 114.79%, respectively, under the optimized icELISA conditions. The limit of detection (LOD) for ZEN was 0.64 μg/L, and its linear working range was between 1.03 and 288.55 μg/L. The mAbs preparation and the optimization of icELISA conditions promote the potential development of a rapid test ELISA kit, providing an alternative method for detecting ZEN and its homologs in cereals and feed.
Collapse
|
11
|
Mari GM, Li H, Dong B, Yang H, Talpur A, Mi J, Guo L, Yu X, Ke Y, Han D, Wang Z. Hapten synthesis, monoclonal antibody production and immunoassay development for direct detection of 4-hydroxybenzehydrazide in chicken, the metabolite of nifuroxazide. Food Chem 2021; 355:129598. [PMID: 33765482 DOI: 10.1016/j.foodchem.2021.129598] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 02/13/2021] [Accepted: 03/08/2021] [Indexed: 01/04/2023]
Abstract
Derivatization is usually employed in immunoassay for detection of metabolites of nitrofurans and avoiding derivatization could be preferable to achieve an efficient screening. In the study, we designed four haptens of 4-hydroxybenhydrazide (HBH), the nifuroxazide metabolite. The effect of hapten structures on antibody affinity were evaluated and one monoclonal antibody was produced by using the Hapten C with a linear alkalane spacer arm. After optimization, an enzyme linked-immunosorbent assay (ELISA) was established with an 50% inhibition concentration of 0.25 ng mL-1 for HBH, which could ensure the direct detection of HBH without derivatization. The limit of detection of the ELISA for HBH was 0.12 µg kg-1 with the recoveries of 90.1-96.2% and coefficient of variation (CV) values lower than 9.1%. In conclusion, we produced several high affinity antibodies to HBH with new designed hapten and developed an icELISA for the direct detection of HBH without derivatization in chicken.
Collapse
Affiliation(s)
- Ghulam Mujtaba Mari
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Hongfang Li
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Baolei Dong
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Huijuan Yang
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Aisha Talpur
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Jiafei Mi
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Liuchuan Guo
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Xuezhi Yu
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China
| | - Yuebin Ke
- Department of Genetic Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen 518020, People's Republic of China
| | - Diangang Han
- Technology Center of Kunming Customs, Kunming 650299, People's Republic of China
| | - Zhanhui Wang
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, Beijing Laboratory for Food Quality and Safety, Beijing 100193, People's Republic of China.
| |
Collapse
|
12
|
Ren Z, Chen Y, Wang J, Zheng P, Zhang H, Jiang H. A highly specific and sensitive indirect competitive monoclonal ELISA for the detection of brombuterol in animal feed, swine urine, pork and liver samples. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 38:586-593. [PMID: 33596157 DOI: 10.1080/19440049.2021.1877835] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Brombuterol, a new β-adrenergic agonist to enhance animal growth and increase feeding efficiency, is forbidden as an additive in animal feed for livestock production due to its adverse effects on consumers. In this study, a highly specific and sensitive monoclonal antibody was obtained and an indirect competitive monoclonal ELISA was developed to detect brombuterol, with an IC50 value of 0.1 μg/kg (μg/L) and no cross-reactivity to other structurally related β-adrenergic agonists. The average recovery of brombuterol using the icELISA method ranged from 72.9% to 106.4% with the coefficient of variation lower than 18.9%, which was determined by analysing spiked animal feed, swine urine, pork and liver samples (n = 5). Finally, the icELISA gave results having a good correlation with those obtained by liquid chromatography-tandem mass spectrometry. These results demonstrated that the developed icELISA for the detection of brombuterol is highly specific, sensitive, and reliable, indicating good potential for use in the area of food safety to improve consumer protection.
Collapse
Affiliation(s)
- Zhenhui Ren
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, PR China
| | - Yinhui Chen
- Products Development Department, Beijing WDWK Biotechnology Co. Ltd, Beijing, PR China
| | - Jianyi Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, PR China
| | - Pimiao Zheng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, PR China
| | - Huixia Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, PR China
| | - Haiyang Jiang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, PR China
| |
Collapse
|
13
|
Jiang B, Qu H, Kong H, Zhang Y, Liu S, Cheng J, Yan X, Zhao Y. The Effects of Sweet Foods on the Pharmacokinetics of Glycyrrhizic Acid by icELISA. Molecules 2017; 22:molecules22030498. [PMID: 28335563 PMCID: PMC6155382 DOI: 10.3390/molecules22030498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/13/2017] [Accepted: 03/16/2017] [Indexed: 12/12/2022] Open
Abstract
The effect of sweet foods, such as honey, was investigated from the perspective of pharmacokinetics on the absorption of glycyrrhizic acid (GA). Due to the unique properties of indirect competitive enzyme-linked immunosorbent assay (icELISA), namely, its: specificity, sensitivity, repeatability, simple pretreatment of samples, fast and simple operation, and because it is economic and non-polluting, it has received increased attention. In this study, we used the advantages of this method to see how honey affected the pharmacokinetics of GA. The effects of honey on the pharmacokinetics of GA by ELISA were investigated for the first time. The results indicate that honey can postpone the peak concentration of GA in mouse blood, and this effect correlates well with fructose. As a representative of sweet foods, the result provides the valuable information that honey, or fructose, may act as sustained-releasing drugs in clinical scenarios; and that sweet foods may have some influences on drugs when taken together.
Collapse
Affiliation(s)
- Bingqian Jiang
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| | - Huihua Qu
- Institute of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| | - Hui Kong
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| | - Yue Zhang
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| | - Shuchen Liu
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| | - Jinjun Cheng
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| | - Xin Yan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| | - Yan Zhao
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing 100029, China.
| |
Collapse
|
14
|
Yusakul G, Sakamoto S, Pongkitwitoon B, Tanaka H, Morimoto S. Effect of linker length between variable domains of single chain variable fragment antibody against daidzin on its reactivity. Biosci Biotechnol Biochem 2016; 80:1306-12. [PMID: 27116996 DOI: 10.1080/09168451.2016.1156482] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The peptide linker between variable domains of heavy (VH) and light (VL) chains is one of important factors that influence the characteristics of scFv, including binding activity and specificity against target antigen. The scFvs against daidzin (DZ-scFvs) with different linker lengths were constructed in the format of VH-(GGGGS)n-VL (n = 1, 3, 5, and 7). They were expressed in the hemolymph of silkworm larvae using the Bombyx mori nucleopolyhedrovirus (BmNPV) bacmid DNA system, and their reactivity against daidzin and related compounds were evaluated using an indirect competitive enzyme-linked immunosorbent assay (icELISA), which is applicable for quantitative analysis of daidzin. The results showed that the reactivity of scFvs against daidzin was increased, whereas specificity slightly decreased when their peptide linker was lengthened. These results suggested that the linker length of DZ-scFvs contributes to its reactivity. In addition, the results emphasize that the linker length could control the reactivity of DZ-scFvs.
Collapse
Affiliation(s)
- Gorawit Yusakul
- a Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences , Kyushu University , Fukuoka , Japan
| | - Seiichi Sakamoto
- a Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences , Kyushu University , Fukuoka , Japan
| | - Benyakan Pongkitwitoon
- b Faculty of Pharmacy, Department of Pharmaceutical Botany , Mahidol University , Bangkok , Thailand
| | - Hiroyuki Tanaka
- a Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences , Kyushu University , Fukuoka , Japan
| | - Satoshi Morimoto
- a Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences , Kyushu University , Fukuoka , Japan
| |
Collapse
|
15
|
Limsuwanchote S, Wungsintaweekul J, Keawpradub N, Putalun W, Morimoto S, Tanaka H. Development of indirect competitive ELISA for quantification of mitragynine in Kratom (Mitragyna speciosa (Roxb.) Korth.). Forensic Sci Int 2014; 244:70-7. [PMID: 25216455 DOI: 10.1016/j.forsciint.2014.08.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 08/08/2014] [Accepted: 08/12/2014] [Indexed: 11/20/2022]
Abstract
Monoclonal antibody (MAb) against mitragynine (MG), an analgesic alkaloid from Kratom leaves (Mitragyna speciosa), was produced. MG was coupled to carrier proteins employing either 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxysuccinimide (EDC/NHS), a zero-length cross linker or a 5-carbon length glutaraldehyde cross linker. To confirm the immunogenicity, the hapten numbers were determined using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). Preparation of the MAb was accomplished by the electrofusion method. Hybridoma 1A6 that was constructed from the fusion between splenocytes of EDC/NHS conjugate immunized mice and SP2/0-Ag14 myeloma cells was selected, cloned twice and expanded. The cross-reactivities (CRs) of this MAb 1A6 with a series of indole alkaloids were 30.54%, 24.83% and 8.63% for speciogynine, paynantheine and mitraciliatine, respectively. Using this MAb, an indirect competitive enzyme-linked immunosorbent assay (icELISA) was developed with a measurement range of 32.92-250 μg/mL. Quantitative analysis of the MG contents in plant samples by icELISA correlated well with the standard high performance liquid chromatography method (R(2)=0.994). The MAb against mitragynine provided a tool for detection of MG in Kratom preparations.
Collapse
|
16
|
Zhao Y, Kong H, Sun Y, Feng H, Zhang Y, Su X, Qu H, Wang Q. Assessment of baicalin in mouse blood by monoclonal antibody-based icELISA. Biomed Chromatogr 2014; 28:1864-8. [PMID: 24917181 DOI: 10.1002/bmc.3235] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 02/27/2014] [Accepted: 04/08/2014] [Indexed: 01/18/2023]
Abstract
An indirect competitive enzyme-linked immunosorbent assay (icELISA) based on monoclonal antibaodies (MAb) was recently developed. This new method displays high sensitivity and accuracy, and is especially suitable for pharmacokinetic studies in small laboratory animals. This study aimed to develop an icELISA procedure for baicalin (BAL) quantitation in blood. We successfully developed the icELISA and applied in pharmacokinetic assays of Gegen Qinlian Decoction in mice. A linear correlation was obtained for BAL concentrations in the range from 34.69 to 2220.00 µg/L. The regression equation was y = 1.5557 - 0.4028log(C) with a correlation coefficient of 0.9936. Precision and accuracy of the icELISA method were evaluated by the variations between replicates from well to well (intra-assay) and plate to plate (inter-assay). The values obtained for these parameters were within the normal range (<15%). The recovery rates ranged from 98.93 to 126.78%, meeting the requirements for biological samples. Stability studies showed that BAL sample solutions were intact for 1 h, enough time for UV detection. However, long-term storage and especially freeze-thaw procedures were detrimental to BAL. The pharmacokinetic parameters derived from mouse experiments were as follows: area under the curves from time 0 to 48 h, 1876.15 ± 1108.14 mg h/L; mean maximum blood concentrations, 101.09 ± 31.53 mg/L; time of maximum concentration, 3.58 ± 2.88 h; mean residence time, 79.30 ± 61.21 h.
Collapse
Affiliation(s)
- Yan Zhao
- School of Preclinical Medicine, Beijing University of Chinese Medicine, Beijing, 100029, China
| | | | | | | | | | | | | | | |
Collapse
|