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Chen L, Tian X, Li Y, Yang C, Huang Y, Nie Y. Rapid and sensitive screening of multiple polycyclic aromatic hydrocarbons by a reusable fluorescent sensor array. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127694. [PMID: 34785436 DOI: 10.1016/j.jhazmat.2021.127694] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 10/30/2021] [Accepted: 11/01/2021] [Indexed: 05/29/2023]
Abstract
Simple and rapid sensing of polycyclic aromatic hydrocarbons (PAHs) remains a great technical challenge due to their chemical stability and structural similarity. Here, a simple, sensitive and cost-effective sensing strategy is proposed to detect multiple PAHs by utilizing the inner filter effect (IFE) and a reusable fluorescent sensor array consisting of four polyvinyl alcohol (PVA) composite carbon quantum dots (CDs) film sensors. The CDs/PVA films have a wide and tunable excitation range, which provide sufficient spectral overlap with PAHs and ensure the efficient occurrence of IFE. Under different excitations, the diverse UV absorption capacities of PAHs resulted in diverse spectral responses, enabling a unique chemical fingerprint for each PAH. Upon multivariate pattern recognition analysis, the array rendered high-throughput discrimination and sensitive quantification of 16 priority PAHs with 100% classification accuracy and detection limit as low as 57 nM. Moreover, the rapid and accurate screening of multiple environmental samples were also realized with the results consistent with high-performance liquid chromatography. This IFE-based reusable array is readily prepared, green and feasible, which exhibits great potential in environmental analysis and brings an advanced strategy to high-throughput sensing of more pollutants with similar structures and lack of recognition sites.
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Affiliation(s)
- Linfeng Chen
- School of Pharmacy, Hubei University of Science and Technology, Xianning 437100, PR China; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China
| | - Xike Tian
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, PR China
| | - Yong Li
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China
| | - Chao Yang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, PR China
| | - Yunjie Huang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China
| | - Yulun Nie
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, PR China.
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Liang Z, Li QX. π-Cation Interactions in Molecular Recognition: Perspectives on Pharmaceuticals and Pesticides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:3315-3323. [PMID: 29522678 PMCID: PMC7357627 DOI: 10.1021/acs.jafc.8b00758] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The π-cation interaction that differs from the cation-π interaction is a valuable concept in molecular design of pharmaceuticals and pesticides. In this Perspective we present an up-to-date review (from 1995 to 2017) on bioactive molecules involving π-cation interactions with the recognition site, and categorize into systems of inhibitor-enzyme, ligand-receptor, ligand-transporter, and hapten-antibody. The concept of π-cation interactions offers use of π systems in a small molecule to enhance the binding affinity, specificity, selectivity, lipophilicity, bioavailability, and metabolic stability, which are physiochemical features desired for drugs and pesticides.
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Affiliation(s)
| | - Qing X. Li
- Corresponding Author: . Fax: (808) 965-3542
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Li X, Kaattari SL, Vogelbein MA, Unger MA. Evaluation of a time efficient immunization strategy for anti-PAH antibody development. J Immunoassay Immunochem 2016; 37:671-83. [DOI: 10.1080/15321819.2016.1198803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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4
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Li X, Kaattari SL, Vogelbein MA, Vadas GG, Unger MA. A highly sensitive monoclonal antibody based biosensor for quantifying 3-5 ring polycyclic aromatic hydrocarbons (PAHs) in aqueous environmental samples. SENSING AND BIO-SENSING RESEARCH 2016; 7:115-120. [PMID: 26925369 DOI: 10.1016/j.sbsr.2016.02.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Immunoassays based on monoclonal antibodies (mAbs) are highly sensitive for the detection of polycyclic aromatic hydrocarbons (PAHs) and can be employed to determine concentrations in near real-time. A sensitive generic mAb against PAHs, named as 2G8, was developed by a three-step screening procedure. It exhibited nearly uniformly high sensitivity against 3-ring to 5-ring unsubstituted PAHs and their common environmental methylated PAHs, with IC50 values between 1.68-31 μg/L (ppb). 2G8 has been successfully applied on the KinExA Inline Biosensor system for quantifying 3-5 ring PAHs in aqueous environmental samples. PAHs were detected at a concentration as low as 0.2 μg/L. Furthermore, the analyses only required 10 min for each sample. To evaluate the accuracy of the 2G8-based biosensor, the total PAH concentrations in a series of environmental samples analyzed by biosensor and GC-MS were compared. In most cases, the results yielded a good correlation between methods. This indicates that generic antibody 2G8 based biosensor possesses significant promise for a low cost, rapid method for PAH determination in aqueous samples.
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Affiliation(s)
- Xin Li
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA 23062
| | - Stephen L Kaattari
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA 23062
| | - Mary A Vogelbein
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA 23062
| | - George G Vadas
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA 23062
| | - Michael A Unger
- Department of Aquatic Health Sciences, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA 23062
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Huang X, Chen R, Xu H, Lai W, Xiong Y. Nanospherical Brush as Catalase Container for Enhancing the Detection Sensitivity of Competitive Plasmonic ELISA. Anal Chem 2016; 88:1951-8. [DOI: 10.1021/acs.analchem.5b04518] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiaolin Huang
- State
Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China
- Jiangxi-OAI
Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Rui Chen
- State
Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China
- College
of Life Science, Nanchang University, Nanchang 330031, P. R. China
- Jiangxi-OAI
Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Hengyi Xu
- State
Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China
| | - Weihua Lai
- State
Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China
| | - Yonghua Xiong
- State
Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China
- College
of Life Science, Nanchang University, Nanchang 330031, P. R. China
- Jiangxi-OAI
Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
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6
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Misra BB, Dey S. Immunolocalization of α-santalol in sandalwood. JOURNAL OF ESSENTIAL OIL RESEARCH 2014. [DOI: 10.1080/10412905.2014.910709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Feng H, Zhou L, Shi L, Li W, Yuan L, Li D, Cai Q. Development of enzyme-linked immunosorbent assay for determination of polybrominated diphenyl ether BDE-121. Anal Biochem 2014; 447:49-54. [DOI: 10.1016/j.ab.2013.10.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 09/24/2013] [Accepted: 10/23/2013] [Indexed: 11/15/2022]
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8
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Liu F, Lou Y, Shi X, Wang H, Zhu X. Preparation and characterization of monoclonal antibody specific for copper–chelate complex. J Immunol Methods 2013; 387:228-36. [DOI: 10.1016/j.jim.2012.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Revised: 10/29/2012] [Accepted: 11/01/2012] [Indexed: 10/27/2022]
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9
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Grandke J, Oberleitner L, Resch-Genger U, Garbe LA, Schneider RJ. Quality assurance in immunoassay performance—comparison of different enzyme immunoassays for the determination of caffeine in consumer products. Anal Bioanal Chem 2012; 405:1601-11. [DOI: 10.1007/s00216-012-6596-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 11/19/2012] [Accepted: 11/21/2012] [Indexed: 11/24/2022]
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Yang P, Zheng Q, Xu H, Liu J, Jin L. A Highly Sensitive Electrochemical Impedance Spectroscopy Immunosensor for Determination of 1-Pyrenebutyric Acid Based on the Bifunctionality of Nafion/Gold Nanoparticles Composite Electrode. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201100485] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Zhao H, Nan T, Tan G, Gao W, Cao Z, Sun S, Li Z, Li QX, Wang B. Development of two highly sensitive immunoassays for detection of copper ions and a suite of relevant immunochemicals. Anal Chim Acta 2011; 702:102-8. [DOI: 10.1016/j.aca.2011.06.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Revised: 05/16/2011] [Accepted: 06/13/2011] [Indexed: 11/30/2022]
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12
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Ahmad A, Paschero A, Moore E. Amperometric Immunosensors for screening of Polycyclic Aromatic Hydrocarbons in water. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/307/1/012023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Karsunke XYZ, Pschenitza M, Rieger M, Weber E, Niessner R, Knopp D. Screening and characterization of new monoclonal anti-benzo[a]pyrene antibodies using automated flow-through microarray technology. J Immunol Methods 2011; 371:81-90. [PMID: 21723870 DOI: 10.1016/j.jim.2011.06.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 06/08/2011] [Accepted: 06/16/2011] [Indexed: 11/30/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants, which can cause cancer in humans. The maximum tolerable limit of benzo[a]pyrene (B[a]P) in drinking water was set to 10 ng/L by the European Commission (Council Directive 98/83/EC), because of its highly carcinogenic and mutagenic effect on humans. In the present investigation, mice were immunized with B[a]P-bovine serum albumin conjugates and 110 generated hybridoma cell lines screened by different techniques to identify clones that produce anti-B[a]P antibodies. Subsequently, a new automated flow-through biochip noncompetitive direct chemiluminescence immunoassay (CLEIA) was compared with conventional indirect and direct enzyme-linked immunosorbent assays (ELISAs). It was demonstrated that the microchip-based screening method compared to ELISA was fast and very sensitive with use of only nanoliter volumes of supernatant. Forty clones could be evaluated in less than 5 min. Six high affinity monoclonal antibodies with different cross-reactivities (CR) for individual PAHs were identified by the chip-based assay and indirect microtiter plate ELISA. In comparison, the direct ELISA in the microtiter plate failed to identify three of these clones. The four antibodies with the highest affinity had half maximum inhibitory concentrations (IC(50) values) between 0.31 and 0.92 μg/L for B[a]P. Affinity constants of these four antibodies were determined by surface plasmon resonance using a water soluble B[a]P-peptide. The observed CR pattern of the four monoclonal antibodies for 16 tested PAHs was quite different. Only one specific antibody for B[a]P was observed, while others were more suitable for class-specific PAH determination.
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Affiliation(s)
- Xaver Y Z Karsunke
- Institute of Hydrochemistry, Technische Universität München, Marchioninistr. 17, 81377 München, Germany
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15
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CdTe Nanoparticles Labeled with Anti-Fluorethene Antibody and Fluorescent Immunoassay of Fluoranthene in Water Samples. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2010. [DOI: 10.3724/sp.j.1096.2010.00385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Predicting the cross-reactivities of polycyclic aromatic hydrocarbons in ELISA by regression analysis and CoMFA methods. Anal Bioanal Chem 2010; 397:2551-7. [DOI: 10.1007/s00216-010-3785-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Revised: 04/15/2010] [Accepted: 04/24/2010] [Indexed: 10/19/2022]
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17
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YE QY, ZHUANG HS, WANG QE, ZHANG JY, ZHOU C. Fluorescent Immunoassay of Fluoranthene in Water Samples with CdTe Nanoparticles Labeled with Anti-fluorethene-antibody. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2010. [DOI: 10.1016/s1872-2040(09)60031-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Ye QY, Zhuang HS, Zhou C. Detection of trace anthracene in soil samples with real-time fluorescence quantitative immuno-PCR using a molecular beacon probe. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2009; 28:386-391. [PMID: 21784031 DOI: 10.1016/j.etap.2009.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2009] [Revised: 06/09/2009] [Accepted: 06/13/2009] [Indexed: 05/31/2023]
Abstract
We developed a highly sensitive and robust real-time fluorescence quantitative immuno-PCR (RTFQ-IPCR) method which uses molecular beacon (MB) probe to detect trace anthracene in the environment. This method was performed on serial dilutions of known anthracene concentrations equivalent to 10-fold dilutions of 10fg/mL to 100pg/mL. We obtained a linear relationship between 10fg/mL and 100pg/mL, with y=0.684x+13.221. A correlation coefficient of 0.994 was also identified, with a detection limit of 4.5fg/mL. After investigating the presence of anthracene in soil samples via RTFQ-IPCR, the obtained concentrations were confirmed by ELISA to be correct and believable, with the recovery ratio ranging from 82% to 112.5%. Based on its sensitivity and reproducibility, MB-based RTFQ-IPCR was found to be acceptable for use in on-site field tests to provide rapid, quantitative, and reliable test results for making environmental decisions.
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Affiliation(s)
- Qi-Yan Ye
- College of Environmental Science and Engineering, Donghua University, 2999 North Renming Road, Songjiang, Shanghai 201620, China
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19
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The development and evaluation of monoclonal antibodies for the detection of polycyclic aromatic hydrocarbons. Anal Biochem 2009; 387:287-93. [DOI: 10.1016/j.ab.2009.01.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Revised: 01/13/2009] [Accepted: 01/14/2009] [Indexed: 11/20/2022]
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20
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Adrian J, Font H, Diserens JM, Sánchez-Baeza F, Marco MP. Generation of broad specificity antibodies for sulfonamide antibiotics and development of an enzyme-linked immunosorbent assay (ELISA) for the analysis of milk samples. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:385-394. [PMID: 19154159 DOI: 10.1021/jf8027655] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Immunoreagents appropriately produced to detect a wide range of sulfonamide antibiotic congeners have been used to develop a highly sensitive enzyme-linked immunosorbent assay (ELISA). The selectivity has been achieved by combining antibodies raised against 5-[6-(4-aminobenzenesulfonylamino)pyridin-3-yl]-2-methylpentanoic acid (SA1), covalently coupled to horseshoe crab hemocyanin (HCH), and 5-[4-(amino)phenylsulfonamide]-5-oxopentanoic acid (SA2), coupled to ovalbumin (OVA), on an indirect ELISA format. The immunizing hapten has been designed to address selectivity against the common aminobenzenesulfonylamino moieties, using theoretical calculations and molecular modeling tools. Hapten SA1 has been synthesized in four steps from methyl 5-(4-amino-3-pyridinyl)-2-methyl-4-pentenoate through a Heck reaction, under Jeffery conditions, to avoid introduction of additional epitopes in the linker. The microplate immunoassay developed is able to reach the necessary detectability for the determination of the sulfonamide antibiotics most frequently used in the veterinary field, in compliance with the EC Regulation 2377/90. As an example, the IC(50) and LOD values accomplished for sulfapyridine are 2.86 +/- 0.24 and 0.13 +/- 0.03 microg L(-1), respectively. Studies performed with different types of milk samples demonstrate that direct and accurate measurements can be performed in this type of matrix without any previous sample cleanup method.
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Affiliation(s)
- Javier Adrian
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, Jorge Girona, Barcelona, Spain
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21
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Zhou C, Wang QE, Zhuang HS. Determination of phenanthrene by antibody-coated competitive real-time immuno-PCR assay. Anal Bioanal Chem 2008; 391:2857-63. [DOI: 10.1007/s00216-008-2217-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2008] [Revised: 05/23/2008] [Accepted: 05/28/2008] [Indexed: 11/29/2022]
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22
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Liu LB, Liu Y, Lin JM, Tang N, Hayakawa K, Maeda T. Development of analytical methods for polycyclic aromatic hydrocarbons (PAHs) in airborne particulates: a review. J Environ Sci (China) 2007; 19:1-11. [PMID: 17913146 DOI: 10.1016/s1001-0742(07)60001-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
In the present work, the different sample collection, pretreatment and analytical methods for polycyclic aromatic hydrocarbons (PAHs) in airborne particulates is systematacially reviewed, and the applications of these pretreatment and analytical methods for PAHs are compared in detail. Some comments on the future expectation are also presented.
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Affiliation(s)
- Li-bin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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23
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Liu N, Wen X, Liu J, Liang M, Zeng H, Lin Y, Yu B. Determination of ruscogenin in crude Chinese medicines and biological samples by immunoassay. Anal Bioanal Chem 2006; 386:1727-33. [PMID: 16957914 DOI: 10.1007/s00216-006-0767-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2006] [Revised: 08/09/2006] [Accepted: 08/14/2006] [Indexed: 10/24/2022]
Abstract
Ruscogenin is a major bioactive steroidal aglycone found in the Chinese medicine, Ophiopogon japonicus. We have developed a quantitative determination of ruscogenin with an indirect enzyme-linked immunosorbent (ELISA) assay using polyclonal antibodies against ruscogenin conjugated with bovine serum albumin. This assay was highly sensitive, and it had considerably less cross-reactivity to diosgenin and sarsasapogenin, but high cross-reactivity to ruscogenin glycosides. The assay was successfully used for the measurement of ruscogenin concentrations in crude Chinese medicines and in biological samples from a pharmacokinetics study of ruscogenin.
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Affiliation(s)
- Nan Liu
- Department of Complex Prescription of TCM, China Pharmaceutical University, 1 Shennong Road, Nanjing, 210038, People's Republic of China
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Maisonnette C, Simon P, Hennion MC, Pichon V. Selective immunoclean-up followed by liquid chromatography for the monitoring of a biomarker of exposure to polycyclic aromatic hydrocarbons in urine at the ngl−1 level. J Chromatogr A 2006; 1120:185-93. [PMID: 16414055 DOI: 10.1016/j.chroma.2005.12.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Revised: 11/08/2005] [Accepted: 12/02/2005] [Indexed: 10/25/2022]
Abstract
A selective clean-up procedure using an immunosorbent (IS) was developed for the trace-level determination, in water and urine samples, of 3-benzo(a)pyrene-glucuronide (3-BP-G), a biomarker of exposure to carcinogenic polycyclic aromatic hydrocarbons (PAHs). First, three sorbents used for the immobilization of antibodies were evaluated for their ability to limit the risk of non-specific interactions and to provide a high bonding density. The best sorbent, i.e. sepharose, was used for the immobilization of two different monoclonal antibodies. The most specific antibody for 3-BP-G was applied to the selective extraction from urine providing a clean extract, an easy and reliable quantification by comparison with a classical SPE process. The sensitivity of the fluorescence associated with the selectivity of the IS provides a limit of detection up to 1.2 ng l(-1) in urine for 3-BP-G.
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Affiliation(s)
- Carine Maisonnette
- Laboratoire Environnement et Chimie Analytique, LECA, UMR CNRS 7121, Ecole Supérieure de Physique et Chimie Industrielles, ESPCI, 10, rue Vauquelin 75231 Paris Cedex 05, France
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Grubor NM, Hayes J, Small GJ, Jankowiak R. Cross-reactivity and conformational multiplicity of an anti-polycyclic aromatic hydrocarbon mAb. Proc Natl Acad Sci U S A 2005; 102:7453-8. [PMID: 15888556 PMCID: PMC1140447 DOI: 10.1073/pnas.0502540102] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cross-reactivity and multispecific functionality of antibodies play a central role in the immune system. The Ab's promiscuity is attributed to structural flexibility and conformational multiplicity of its binding sites governed by the rearrangement of hydrogen bonding centers. However, antibodies whose recognition and binding rely on less directional hydrophobic interactions might follow different interaction pathways. We investigated interaction of anti-polycyclic aromatic hydrocarbon mAb with two biologically important cross-reactants, pyrene and benzo(a)pyrene. Complex formation was characterized by means of low-temperature laser-induced fluorescence spectroscopy in both low- and high-resolution fluorescence line-narrowing (FLN) modes. It is shown that the FLN spectroscopy can identify various haptens cross-reacted with an Ab, as well as simultaneously differentiate between free and immunocomplexed haptens. In addition, our results suggest an interesting case of an Ab binding a particular cross-reactant by adopting two distinct conformations of its binding sites. The existence of the multiple conformations for anti-polycyclic aromatic hydrocarbon mAb that are trapped at low temperature can be rationalized through the existing models for Ab binding. Finally, as revealed by FLN spectra of immunocomplexed chromophores, pi-pi interactions, rather than hydrogen bonding, play the central role in complex formation.
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Affiliation(s)
- Nenad M Grubor
- Ames Laboratory-U.S. Department of Energy, Iowa State University, Ames, IA 50011, USA
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Matschulat D, Deng A, Niessner R, Knopp D. Development of a highly sensitive monoclonal antibody based ELISA for detection of benzo[a]pyrene in potable water. Analyst 2005; 130:1078-86. [PMID: 15965533 DOI: 10.1039/b503636d] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In Europe, a limit value of 10 ng L(-1) was set by the European Commission for benzo[a]pyrene (B[a]P) in water intended for human consumption (Council Directive 98/83/EC) and, therefore, sensitive and reliable methods are needed to evaluate its presence. We report here on the development of a highly sensitive indirect competitive ELISA for the detection of B[a]P in potable water. Fourteen monoclonal antibodies were generated in mice using novel B[a]P derivatives. The immunoassay with the least interference and the best sensitivity was optimized and characterized. As co-solvent, ten percent methanol (v/v) was determined as the optimum concentration for B[a]P solubilization for use with the developed ELISA. With the purified antibody (clone 22F12) the average IC50 for B[a]P and corresponding detection limit at a signal:noise (S/N) ratio of 3 was 65 ng L(-1) and 24 ng L(-1), respectively. From the 16 EPA-designated PAHs, only chrysene, indeno[1,2,3-cd]pyrene, and benzo[b]fluoranthene showed a cross-reactivity (CR) higher than 20%. No CR was observed for two- and three-ringed aromatics as well as dibenz[ah]anthracene and benzo[ghi]perylene. The effect of pH value (range 6.5-9.5), ionic strength (specific electric conductivity 1 microS cm(-1)-2.5 mS cm(-1)), and inorganic ions (sodium, copper, iron, aluminium, manganese, chloride, sulfate, nitrate, and nitrite at maximum permissible levels according to the Council Directive) on both signal and sensitivity of the ELISA was studied. No significant influence of these parameters on the ELISA competition curve was found. We suggest that the optimized ELISA can be used to monitor potable water samples without previous extraction from the samples. The assay should facilitate the cleanup of B[a]P contaminated sites where B[a]P levels fall close to the limit value of the new drinking water directive.
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Affiliation(s)
- Diana Matschulat
- Institute of Hydrochemistry and Chemical Balneology, Technical University Munich, Marchioninistrasse 17, D-81377 Munich, Germany
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Song JM, Vo-Dinh T. Miniature biochip system for detection of Escherichia coli O157:H7 based on antibody-immobilized capillary reactors and enzyme-linked immunosorbent assay. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2003.11.072] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Delaunay-Bertoncini N, Hennion MC. Immunoaffinity solid-phase extraction for pharmaceutical and biomedical trace-analysis—coupling with HPLC and CE—perspectives. J Pharm Biomed Anal 2004; 34:717-36. [PMID: 15019051 DOI: 10.1016/s0731-7085(03)00559-4] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/22/2003] [Indexed: 10/26/2022]
Abstract
Immunoaffinity solid-phase extraction (SPE) technique is based upon a molecular recognition mechanism. The high affinity and the high selectivity of the antigen-antibody interactions allow the specific extraction and the concentration of the analytes of interest in one step. In pharmaceutical and biological fields, where most often matrices are complex and analytes at trace-levels, this approach constitutes a unique tool for fast and solvent-free sample preparation. This review presents a general description of this extraction technique and gives numerous examples of its applications in pharmaceutical and biomedical fields. It emphasizes the on-line coupling with chromatographic and electrophoretic separation techniques and introduces new developments. The future directions, especially with regards to the current development of analytical microsystems, are discussed.
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Affiliation(s)
- N Delaunay-Bertoncini
- Laboratoire des Sciences Analytiques, CPE, Université Lyon I, 43 boulevard du 11 novembre 1918, 69622 Villeurbanne cedex, France.
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Delaunay-Bertoncini N, Pichon V, Hennion MC. Experimental comparison of three monoclonal antibodies for the class-selective immunoextraction of triazines. Correlation with molecular modeling and principal component analysis studies. J Chromatogr A 2003; 999:3-15. [PMID: 12885046 DOI: 10.1016/s0021-9673(03)00425-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The specificity of three immunosorbents (ISs) based on different monoclonal anti-triazine antibodies has been characterized by extraction recoveries studies and with step elution experiments. Both indicated that the anti-dichloroatrazine IS is specific of terbutylazine and cyanazine. The anti-atrazine IS is specific of the chlorotriazines, whereas the anti-ametryn IS can trap all the triazines. This confirms the great influence of the hapten design on the specificity of the resulting antibodies, even if the target molecules are small. Moreover, the anti-ametryn IS is suitable for class-selective extraction of triazines contained in complex matrices. An approach designed to learn more about the specificity for a group of structurally related compounds of antibodies produced with a given compound is proposed and evaluated. Molecular modeling followed by principal component analysis has been used to obtain distribution maps with the relative position of each immunoconjugate and all the triazines. In all three cases, conclusions on specificity made with the analysis of the maps fit well with the experimental results. Consequently, molecular modeling coupled with principal component analysis seems to be a unique, inexpensive, and rapid tool to select the appropriate hapten providing highly specific or class-specific antibodies according to the given problem.
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Affiliation(s)
- Nathalie Delaunay-Bertoncini
- Laboratoire Environnement et Chimie Analytique, Ecole Supérieur de Physique et de Chimie Industrielles, 10 Rue Vauqelin, 75231 Paris Cedex 05, France
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Fähnrich KA, Pravda M, Guilbault GG. Disposable amperometric immunosensor for the detection of polycyclic aromatic hydrocarbons (PAHs) using screen-printed electrodes. Biosens Bioelectron 2003; 18:73-82. [PMID: 12445447 DOI: 10.1016/s0956-5663(02)00112-4] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
An amperometric immunosensor for polycyclic aromatic hydrocarbons (PAHs) was developed. The immunosensor was based on disposable screen-printed carbon electrodes. The coating antigen used was phenanthrene-9-carboxaldehyde coupled to bovine serum albumin (BSA) via adipic acid dihydrazide. Antibodies were monoclonal mouse anti-phenanthrene. The enzyme alkaline phosphatase (AP) was used in combination with the substrate p-aminophenyl phosphate (pAPP) for detection at +300 mV (vs. Ag/AgCl). Various assay types were compared. Good results were achieved with an indirect co-exposure competition assay with a LOD of 0.8 ng/ml (800 ppt) and an IC(50) of 7.1 ng/ml (7.1 ppb) for phenanthrene. An indirect competition assay could detect phenanthrene with a LOD of 2 ng/ml (IC(50): 15 ng/ml) and an indirect displacement assay with a LOD of 2 ng/ml (IC(50): 11 ng/ml) at a 5 microl surface coating of 8.8 microg/ml phenanthrene-BSA conjugate. A coating concentration of 2.2 microg/ml allowed detection with a LOD of 0.25 ng/ml (250 ppt) with the indirect competition assay. The influence of the coating concentration on the sensor performance was investigated. Cross-reactivities were tested for 16 important PAHs. Anthracene and chrysene showed strong cross-reactivity, whereas benzo[g,h,i]perylene and dibenzo[a,h]anthracene showed no cross-reactivity.
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Affiliation(s)
- K A Fähnrich
- Department of Chemistry, University College Cork (UCC), Western Road, Cork, Ireland
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31
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Choi J, Kim C, Choi MJ. Effects of the competitor on antibody-hapten binding in immunoassays. J Immunoassay Immunochem 2002; 23:69-83. [PMID: 11848102 DOI: 10.1081/ias-120002275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The effects of competitors on antibody (Ab)-hapten binding in an immunoassay were investigated using a goat antimethamphetamine (MA) antibody (Ab). An N-4-aminobutyl derivative of methamphetamine (4-ABMA) was conjugated with keyhole limpet hemocyanine (KLH) and used as an immunogen. The antiserum was purified by affinity chromatography with various ligands, including 4-ABMA-protein conjugates, free haptens, and protein G. Direct and indirect competitive enzyme-linked immunosorbent assays (ELISA) were conducted with a competitor of 4-ABMA-fluorescein isothiocyanate (4-ABMA-FITC). The results were compared to those of ELISA with a different competing antigen, 4-ABMA-ovalbumin (4-ABMA-OVA), in terms of sensitivity and specificity. In both direct and indirect assay formats, the sensitivity was much improved with 4-ABMA-FITC, compared to that with 4-ABMA-OVA, suggesting that different labels on the same haptenic moiety for competitors considerably influence the assay performance. All the purified Abs also showed a distinct feature of strong affinity for benzphetamine with 4-ABMA-FITC, whereas they had their respective binding specificities with 4-ABMA-OVA. Comparing the results to those from other assay systems, we determined that the assay sensitivity was dependent on both the system and the competitor employed, and that the specificity was primarily dependent on the competitor used.
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Affiliation(s)
- Jeongeun Choi
- Bioanalysis & Biotransformation Research Center, Korea Institute of Science and Technology, Seoul.
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32
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Fähnrich KA, Pravda M, Guilbault GG. IMMUNOCHEMICAL DETECTION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHs). ANAL LETT 2002. [DOI: 10.1081/al-120006666] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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33
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Pellequer JL, Zhao B, Kao HI, Bell CW, Li K, Li QX, Karu AE, Roberts VA. Stabilization of bound polycyclic aromatic hydrocarbons by a pi-cation interaction. J Mol Biol 2000; 302:691-9. [PMID: 10986127 DOI: 10.1006/jmbi.2000.4033] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Proteins can use aromatic side-chains to stabilize bound cationic ligands through cation-pi interactions. Here, we report the first example of the reciprocal process, termed pi-cation, in which a cationic protein side-chain stabilizes a neutral aromatic ligand. Site-directed mutagenesis revealed that an arginine side-chain located in the deep binding pocket of a monoclonal antibody (4D5) is essential for binding the neutral polynuclear aromatic hydrocarbon benzo[a]pyrene. This Arg was very likely selected for in the primary response, further underscoring the importance of the pi-cation interaction for ligand binding, which should be considered in protein analysis and design when ligands include aromatic groups.
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Affiliation(s)
- J L Pellequer
- Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
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34
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Li K, Woodward LA, Karu AE, Li QX. Immunochemical detection of polycyclic aromatic hydrocarbons and 1-hydroxypyrene in water and sediment samples. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(00)00989-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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