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Mukhametova LI, Karimova MR, Zharikova OG, Pirogov AV, Levkina VV, Chichkanova ES, Liu L, Xu C, Eremin SA. Detection of Dibutyl Phthalate in Surface Water by Fluorescence Polarization Immunoassay. BIOSENSORS 2023; 13:1005. [PMID: 38131765 PMCID: PMC10741632 DOI: 10.3390/bios13121005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/19/2023] [Accepted: 11/26/2023] [Indexed: 12/23/2023]
Abstract
Dibutyl phthalate (DBP) is widely used as a plasticizer in the production of polymeric materials to give them flexibility, strength and extensibility. However, due to its negative impact on human health, in particular reproductive functions and fetal development, the content of DBP must be controlled in food and the environment. The present study aims to develop a sensitive, fast and simple fluorescence polarization immunoassay (FPIA) using monoclonal antibodies derived against DBP (MAb-DBP) for its detection in open waters. New conjugates of DBP with various fluorescein derivatives were obtained and characterized: 5-aminomethylfluorescein (AMF) and dichlorotriazinylaminofluorescein (DTAF). The advantages of using the DBP-AMF conjugate in the FPIA method are shown, the kinetics of binding of this chemical with antibodies are studied, the analysis is optimized, and the concentration of monoclonal antibodies is selected for sensitivity analysis-16 nM. The calibration dependence of the fluorescence polarization signal for the detection of DBP was obtained. The observed IC50 (DBP concentration at which a 50% decrease in the fluorescence polarization signal occurs, 40 ng/mL) and the limit of detection (LOD, 7.5 ng/mL) values were improved by a factor of 45 over the previously described FPIA using polyclonal antibodies. This technique was tested by the recovery method, and the high percentage of DBP discovery in water ranged from 85 to 110%. Using the developed method, real water samples from Lake Onega were tested, and a good correlation was shown between the results of the determination of DBP by the FPIA method and GC-MS. Thus, the FPIA method developed in this work can be used to determine DBP in open-water reservoirs.
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Affiliation(s)
- Liliya I. Mukhametova
- Faculty of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (L.I.M.); (O.G.Z.); (A.V.P.); (V.V.L.); (E.S.C.)
- A. N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, Leninskie Prospect 33, 119071 Moscow, Russia
| | - Madina R. Karimova
- Faculty of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (L.I.M.); (O.G.Z.); (A.V.P.); (V.V.L.); (E.S.C.)
| | - Olga G. Zharikova
- Faculty of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (L.I.M.); (O.G.Z.); (A.V.P.); (V.V.L.); (E.S.C.)
| | - Andrey V. Pirogov
- Faculty of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (L.I.M.); (O.G.Z.); (A.V.P.); (V.V.L.); (E.S.C.)
| | - Valentina V. Levkina
- Faculty of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (L.I.M.); (O.G.Z.); (A.V.P.); (V.V.L.); (E.S.C.)
| | - Ekaterina S. Chichkanova
- Faculty of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (L.I.M.); (O.G.Z.); (A.V.P.); (V.V.L.); (E.S.C.)
| | - Liqiang Liu
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China (C.X.)
| | - Chuanlai Xu
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China (C.X.)
| | - Sergei A. Eremin
- Faculty of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (L.I.M.); (O.G.Z.); (A.V.P.); (V.V.L.); (E.S.C.)
- A. N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, Leninskie Prospect 33, 119071 Moscow, Russia
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