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Speranskaya ES, Sevrin C, De Saeger S, Hens Z, Goryacheva IY, Grandfils C. Synthesis of Hydrophilic CuInS2/ZnS Quantum Dots with Different Polymeric Shells and Study of Their Cytotoxicity and Hemocompatibility. ACS APPLIED MATERIALS & INTERFACES 2016; 8:7613-22. [PMID: 26963807 DOI: 10.1021/acsami.5b11258] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this work, there is a detailed description of the whole process of biocompatible CIS/ZnS QDs production. Special attention was paid to the stability of QDs against photooxidation. It was shown that Cu/In ratio greatly affected not only nanocrystals PLQYs but photostability as well. CIS/ZnS QDs with Cu/In = 1:4 ratio showed high photostability under UV illumination both in toluene and aqueous solutions. Meanwhile, photoluminescence of CIS/ZnS QDs with Cu/In = 1:1 ratio was completely quenched after several hours under UV illumination, though their initial QY was as high as 40% with peak maximum at 740 nm. QDs were transferred to water by polymer encapsulation and were subsequently modified with polyethers Jeffamines, cheap analogues of PEG-derivatives. Three types of hydrophilic QDs differing in size, PEG content, and surface charge were obtained for further investigation and comparison of their cytotoxicity and hemocompatibility. It was shown that both leucocytes size distribution and coagulation activation change after introduction of polyethers into QDs polymeric shell, while red blood cells and platelets size distribution as well as hemolysis rate did not show any different results among different QDs and the polymer itself. All three types of QDs showed only slight cytotoxicity. Confocal microscopy proves penetration of hydrophilic CIS/ZnS QDs inside cells, so the low QDs cytotoxocity cannot be explained by low cellular uptake of the QDs and indicated low QDs toxicity in general.
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Di Nardo F, Anfossi L, Giovannoli C, Passini C, Goftman VV, Goryacheva IY, Baggiani C. A fluorescent immunochromatographic strip test using Quantum Dots for fumonisins detection. Talanta 2015; 150:463-8. [PMID: 26838431 DOI: 10.1016/j.talanta.2015.12.072] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 12/22/2015] [Accepted: 12/26/2015] [Indexed: 01/10/2023]
Abstract
A fluorescent immunochromatographic strip test (ICST) based on the use of Quantum Dots (QD) was developed and applied to detect fumonisins in maize samples. A limit of detection for fumonisin B1 of 2.8 µg L(-1) was achieved, with an analytical working range of 3-350 µg L(-1), corresponding to 30-3500 µg kg(-1) in maize flour samples, according with the extraction procedure. The time required to perform the analysis was 22 min, including sample preparation. Recovery values in the range from 91.4% to 105.4% with coefficients of variation not exceeding 5% were obtained for fortified and naturally contaminated maize flour samples. To evaluate the possible improvements due to the use of QD for ICST technology, we performed a direct comparison of the proposed QD-ICST to a gold nanoparticles- and a chemiluminescent-ICST previously developed for fumonisins detection, in which the same immunoreagents were employed.
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Goftman VV, Aubert T, Ginste DV, Van Deun R, Beloglazova NV, Hens Z, De Saeger S, Goryacheva IY. Synthesis, modification, bioconjugation of silica coated fluorescent quantum dots and their application for mycotoxin detection. Biosens Bioelectron 2015; 79:476-81. [PMID: 26745794 DOI: 10.1016/j.bios.2015.12.079] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 12/15/2015] [Accepted: 12/22/2015] [Indexed: 10/22/2022]
Abstract
To create bright and stable fluorescent biolabels for immunoassay detection of mycotoxin deoxynivalenol in food and feed, CdSe/CdS/ZnS core-shell quantum dots (QDs) were encapsulated in silica nanoparticles through a water-in-oil reverse microemulsion process. The optical properties and stability of the obtained silica coated QDs (QD@SiO2), modified with amino, carboxyl and epoxy groups and stabilized with polyethylene glycol fragments, were characterized in order to assess their bioapplicability. The developed co-condensation techniques allowed maintaining 80% of the initial fluorescent properties and yielded stable fluorescent labels that could be easily activated and bioconjugated. Further, the modified QD@SiO2 were efficiently conjugated with antibodies and applied as a novel label in a microtiter plate based immunoassay and a quantitative column-based rapid immunotest for deoxynivalenol detection with IC50 of 473 and 20 ng/ml, respectively.
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Goryacheva IY, Speranskaya ES, Goftman VV, Tang D, De Saeger S. Synthesis and bioanalytical applications of nanostructures multiloaded with quantum dots. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2014.11.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Speranskaya ES, Beloglazova NV, Lenain P, De Saeger S, Wang Z, Zhang S, Hens Z, Knopp D, Niessner R, Potapkin DV, Goryacheva IY. Polymer-coated fluorescent CdSe-based quantum dots for application in immunoassay. Biosens Bioelectron 2013; 53:225-31. [PMID: 24140873 DOI: 10.1016/j.bios.2013.09.045] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 09/10/2013] [Accepted: 09/20/2013] [Indexed: 11/17/2022]
Abstract
The paper describes all stages of synthesis and characterization of biocompatible CdSe-based core/shell quantum dots (QDs) and their application as fluorescent label for immunoassay. Special attention was focused on development of maleic anhydride-based amphiphilic polymers for QDs solubilization in aqueous media. In this work two PEG-amines were tried for polymer modification: monoamine Jeffamine M 1000 used previously in some researches and diamine Jeffamine ED-2003 applied for the first time for QDs solubilization. The use of different Jeffamines allows us to obtain QDs with carboxyl or amine functional groups available for conjugation. The influence of polymer composition on optical properties of the nanocrystals and their stability in aqueous solutions as well as on their conjugation with biomolecules was studied. QDs with different coatings were used as biolabels in quantitative fluorescence microtiter plate immunoassay and qualitative on-site column test. It was found that quantum dots covered with amphiphilic polymer prepared from poly(maleic anhydride-alt-1-octadecene) and Jeffamine ED-2003 retained up to 90% of their initial brightness, easily conjugated with protein and showed low non-specific adsorption. In optimized conditions the obtained QDs were successfully used for determination of mycotoxin deoxynivalenol in wheat and maize samples by fluorescence microtiter plate immunoassay with an IC50 of 220 μg kg(-1) and by on-site column test with cut-off of 500 μg kg(-1).
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Malysheva SV, Diana Di Mavungu J, Goryacheva IY, De Saeger S. A systematic assessment of the variability of matrix effects in LC-MS/MS analysis of ergot alkaloids in cereals and evaluation of method robustness. Anal Bioanal Chem 2013; 405:5595-604. [DOI: 10.1007/s00216-013-6948-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Revised: 03/21/2013] [Accepted: 03/26/2013] [Indexed: 11/27/2022]
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Zhang B, Tang D, Goryacheva IY, Niessner R, Knopp D. Anodic-Stripping Voltammetric Immunoassay for Ultrasensitive Detection of Low-Abundance Proteins Using Quantum Dot Aggregated Hollow Microspheres. Chemistry 2013; 19:2496-503. [DOI: 10.1002/chem.201203131] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Indexed: 01/30/2023]
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Malysheva SV, Diana Di Mavungu J, Boonen J, De Spiegeleer B, Goryacheva IY, Vanhaecke L, De Saeger S. Improved positive electrospray ionization of patulin by adduct formation: Usefulness in liquid chromatography–tandem mass spectrometry multi-mycotoxin analysis. J Chromatogr A 2012. [DOI: 10.1016/j.chroma.2012.10.060] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yuan M, Sheng W, Zhang Y, Wang J, Yang Y, Zhang S, Goryacheva IY, Wang S. A gel-based visual immunoassay for non-instrumental detection of chloramphenicol in food samples. Anal Chim Acta 2012; 751:128-34. [DOI: 10.1016/j.aca.2012.08.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 08/22/2012] [Accepted: 08/28/2012] [Indexed: 11/28/2022]
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Beloglazova NV, Goryacheva IY, de Saeger S, Scippo ML, Niessner R, Knopp D. New approach to quantitative analysis of benzo[a]pyrene in food supplements by an immunochemical column test. Talanta 2011; 85:151-6. [DOI: 10.1016/j.talanta.2011.03.052] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 03/09/2011] [Accepted: 03/20/2011] [Indexed: 11/28/2022]
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Basova EY, Goryacheva IY, Rusanova TY, Burmistrova NA, Dietrich R, Märtlbauer E, Detavernier C, Van Peteghem C, De Saeger S. An immunochemical test for rapid screening of zearalenone and T-2 toxin. Anal Bioanal Chem 2009; 397:55-62. [PMID: 20012025 DOI: 10.1007/s00216-009-3328-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Revised: 11/16/2009] [Accepted: 11/17/2009] [Indexed: 11/30/2022]
Abstract
An immunochemically based test for non-instrumental simultaneous detection of zearalenone (ZEA) and T-2 toxin (T2) in feed was developed. The method combines clean-up of sample extract, pre-concentration of analytes by immunoextraction and immunodetection through the enzymatic reaction of horseradish peroxidase (HRP). The test is housed inside a standard 1-mL solid-phase extraction column and consists of three layers: two test layers (one for ZEA and another for T2) with immobilised specific antibodies and one control layer with bound anti-HRP antibodies. Feed extract was passed through an additional column with clean-up layer, which was disconnected after extract application. Total assay time was about 15 min for six samples and detection time was 4 min after chromogenic substrate application. Under optimised conditions a cut-off level for ZEA and T2 of 100 microg/kg was established. Different feed types were analysed for ZEA and T2 contamination by the proposed method and results were confirmed by LC-MS/MS.
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Basova EY, Goryacheva IY, Mikhirev DA, Rusanova TY, Burmistrova NA, Kerkaert B, Cucu T, De Saeger S, De Meulenaer B. Rapid method for qualitative detection of in environmental samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2009; 1:170-176. [PMID: 32938054 DOI: 10.1039/b9ay00144a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A gel-based immunoassay that can be used for the detection of 2,4,6-trinitrotoluene (TNT) in water samples was developed. Four polyclonal antibodies were generated in chickens using TNT derivatives. The assay was based on the immunoaffinity preconcentration and immuno-enzyme analysis of TNT in the gel. The results of the assay, assessed by color development, were evaluated visually and also by using a flatbed scanner and subsequent digital processing of the scanned gel. The most sensitive color mode, parameter S (saturation, HSB mode), was used for the immunoassay optimization and evaluation of the results. The immunoassays with the best parameters were optimized and characterized. A cut-off level of 5 µg TNT L-1 was reached for water samples. It was shown that tap and environmental water samples could be analyzed directly, without sample preparation and dilution. The developed test is acceptable for use in an on-site field test to provide rapid (about 15 min for six samples), qualitative and reliable results for making environmental decisions such as identifying "hot spots", monitoring of military and terrorist activities, and selecting of site samples for laboratory analysis.
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Burmistrova NA, Goryacheva IY, Basova EY, Franki AS, Elewaut D, Van Beneden K, Deforce D, Van Peteghem C, De Saeger S. Application of a new anti-zearalenone monoclonal antibody in different immunoassay formats. Anal Bioanal Chem 2009; 395:1301-7. [DOI: 10.1007/s00216-009-2913-7] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 06/11/2009] [Accepted: 06/12/2009] [Indexed: 11/29/2022]
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Goryacheva IY, Beloglazova NV, Eremin SA, Mikhirev DA, Niessner R, Knopp D. Gel-based immunoassay for non-instrumental detection of pyrene in water samples. Talanta 2007; 75:517-22. [PMID: 18371915 DOI: 10.1016/j.talanta.2007.11.042] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2007] [Revised: 11/12/2007] [Accepted: 11/15/2007] [Indexed: 11/26/2022]
Abstract
A new qualitative immunologically based tube test for non-instrumental detection of pyrene (PYR) in water samples was developed. The method combines the pre-concentration of analyte by immunoextraction and its detection by immunoassay using Sepharose 4B-immobilized IgG-fraction of a polyclonal anti-PYR antiserum (immunoaffinity gel) and 1-pyrenebutyric acid-horseradish peroxidase conjugate (PYR-BA-HRP). The immunoaffinity gel was placed in a standard 1-ml SPE column through which a 10-ml aliquot of water sample spiked with 10% acetonitrile was passed. Following, free antibody binding sites were detected by application of PYR-BA-HRP. Four minutes after addition of the chromogenic substrate the results were visually evaluated by occurring or stayed away blue colour development for negative and positive samples, respectively. Total time for assay was about 15 min for six samples. Under optimized conditions a cut-off level for pyrene of 0.04 ng ml(-1) was found. At this defined concentration, a set of spiked samples (n=175) was analyzed and very low rates of false negatives (1.2%) and false positives (4.6%) determined which fulfils the requirement set by Commission Decision 2002/657/EC for a screening method. No interference by other PAH compounds like naphthalene, fluoranthene, phenanthrene, anthracene, and benzo[a]pyrene at a concentration of 20 ng ml(-1), i.e., 500-fold excess compared to the defined cut-off level was observed. Different water types like surface water, tap water, bottled water, and melted snow were analyzed for PYR contamination by the proposed method and results confirmed by HPLC-FLD.
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Goryacheva IY, De Saeger S, Eremin SA, Van Peteghem C. Immunochemical methods for rapid mycotoxin detection: Evolution from single to multiple analyte screening: A review. ACTA ACUST UNITED AC 2007; 24:1169-83. [PMID: 17886190 DOI: 10.1080/02652030701557179] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This review focuses on recent developments in immunochemical methods for detection of mycotoxins, with a particular emphasis on simultaneous multiple analyte determination. This includes high-throughput instrumental analysis for the laboratory environment (microtitre plate enzyme-linked immunoabsorbant assay (ELISA), different kinds of immunosensors, fluorescence polarization immunoassay, and capillary electrophoretic immunoassay), as well as rapid visual tests for on-site testing (lateral-flow, dipstick, flow-through and column tests). For each type of immunoassay, perspectives for multiple analyte application are discussed and examples cited.
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Goryacheva IY, De Saeger S, Nesterenko IS, Eremin SA, Van Peteghem C. Rapid all-in-one three-step immunoassay for non-instrumental detection of ochratoxin A in high-coloured herbs and spices. Talanta 2007; 72:1230-4. [DOI: 10.1016/j.talanta.2006.12.049] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2006] [Revised: 12/14/2006] [Accepted: 12/19/2006] [Indexed: 11/25/2022]
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Yu Goryacheva I, Eremin SA, Shutaleva EA, Suchanek M, Niessner R, Knopp D. Development of a Fluorescence Polarization Immunoassay for Polycyclic Aromatic Hydrocarbons. ANAL LETT 2007. [DOI: 10.1080/00032710701297034] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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69
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Goryacheva IY, Shtykov SN, Loginov AS, Panteleeva IV. Preconcentration and fluorimetric determination of polycyclic aromatic hydrocarbons based on the acid-induced cloud-point extraction with sodium dodecylsulfate. Anal Bioanal Chem 2005; 382:1413-8. [PMID: 15995862 DOI: 10.1007/s00216-005-3287-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2005] [Revised: 04/18/2005] [Accepted: 04/24/2005] [Indexed: 10/25/2022]
Abstract
The acid-induced cloud-point extraction (CPE) technique based on sodium dodecylsulfate (SDS) micelles has been used for preconcentration of ten representatives of polycyclic aromatic hydrocarbons (PAHs) for the following fluorescence determination. The effect of the acidity of solution, SDS and electrolyte concentrations, centrifugation time and rate on the two-phase separation process and extraction percentages of PAHs have systematically been examined. Extraction percentages have been obtained for all PAHs after CPE ranged from 67 to 93%. Pyrene was used as a fluorescent probe to monitor the micropolarity of the surfactant-rich phase compared with SDS micelles and this allows one to conclude that water content in micellar phase after CPE is reduced. The spectral, metrological and analytical characteristics of PAH fluorimetric determination after acid-based CPE with sodium dodecylsulfate are presented. Advantages provided by using CPE in combination with fluorimetric determination of PAHs are discussed. The determination of benz[a]pyrene in tap water is presented as an example.
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