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Nikolopoulou V, Aalizadeh R, Nika MC, Thomaidis NS. TrendProbe: Time profile analysis of emerging contaminants by LC-HRMS non-target screening and deep learning convolutional neural network. JOURNAL OF HAZARDOUS MATERIALS 2022; 428:128194. [PMID: 35033918 DOI: 10.1016/j.jhazmat.2021.128194] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/08/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Peak prioritization is one of the key steps in non-target screening of environmental samples to direct the identification efforts to relevant and important features. Occurrence of chemicals is sometimes a function of time and their presence in consecutive days (trend) reveals important aspects such as discharges from agricultural, industrial or domestic activities. This study presents a validated computational framework based on deep learning conventional neural network to classify trends of chemicals over 30 consecutive days of sampling in two sampling sites (upstream and downstream of a river). From trend analysis and factor analysis, the chemicals could be classified into periodic, spill, increasing, decreasing and false trend. The developed method was validated with list of 42 reference standards (target screening) and applied to samples. 25 compounds were selected by the deep learning and identified via non-target screening. Three classes of surfactants were identified for the first time in river water and two of them were never reported in the literature. Overall, 21 new homologous series of the newly identified surfactants were tentatively identified. The aquatic toxicity of the identified compounds was estimated by in silico tools and a few compounds along with their homologous series showed potential risk to aquatic environment.
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Affiliation(s)
- Varvara Nikolopoulou
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
| | - Reza Aalizadeh
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece.
| | - Maria-Christina Nika
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
| | - Nikolaos S Thomaidis
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece.
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Novel Metabolic Pathway for N-Methylpyrrolidone Degradation in Alicycliphilus sp. Strain BQ1. Appl Environ Microbiol 2017; 84:AEM.02136-17. [PMID: 29030443 DOI: 10.1128/aem.02136-17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 10/06/2017] [Indexed: 11/20/2022] Open
Abstract
The molecular mechanisms underlying the biodegradation of N-methylpyrrolidone (NMP), a widely used industrial solvent that produces skin irritation in humans and is teratogenic in rats, are unknown. Alicycliphilus sp. strain BQ1 degrades NMP. By studying a transposon-tagged mutant unable to degrade NMP, we identified a six-gene cluster (nmpABCDEF) that is transcribed as a polycistronic mRNA and encodes enzymes involved in NMP biodegradation. nmpA and the transposon-affected gene nmpB encode an N-methylhydantoin amidohydrolase that transforms NMP to γ-N-methylaminobutyric acid; this is metabolized by an amino acid oxidase (NMPC), either by demethylation to produce γ-aminobutyric acid (GABA) or by deamination to produce succinate semialdehyde (SSA). If GABA is produced, the activity of a GABA aminotransferase (GABA-AT), not encoded in the nmp gene cluster, is needed to generate SSA. SSA is transformed by a succinate semialdehyde dehydrogenase (SSDH) (NMPF) to succinate, which enters the Krebs cycle. The abilities to consume NMP and to utilize it for growth were complemented in the transposon-tagged mutant by use of the nmpABCD genes. Similarly, Escherichia coli MG1655, which has two SSDHs but is unable to grow in NMP, acquired these abilities after functional complementation with these genes. In wild-type (wt) BQ1 cells growing in NMP, GABA was not detected, but SSA was present at double the amount found in cells growing in Luria-Bertani medium (LB), suggesting that GABA is not an intermediate in this pathway. Moreover, E. coli GABA-AT deletion mutants complemented with nmpABCD genes retained the ability to grow in NMP, supporting the possibility that γ-N-methylaminobutyric acid is deaminated to SSA instead of being demethylated to GABA.IMPORTANCEN-Methylpyrrolidone is a cyclic amide reported to be biodegradable. However, the metabolic pathway and enzymatic activities for degrading NMP are unknown. By developing molecular biology techniques for Alicycliphilus sp. strain BQ1, an environmental bacterium able to grow in NMP, we identified a six-gene cluster encoding enzymatic activities involved in NMP degradation. These findings set the basis for the study of new enzymatic activities and for the development of biotechnological processes with potential applications in bioremediation.
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Li H, Jiang Z, Cao X, Su H, Shao H, Jin F, Abd El-Aty A, Wang J. Simultaneous determination of three pesticide adjuvant residues in plant-derived agro-products using liquid chromatography-tandem mass spectrometry. J Chromatogr A 2017; 1528:53-60. [DOI: 10.1016/j.chroma.2017.10.075] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 10/27/2017] [Accepted: 10/30/2017] [Indexed: 10/18/2022]
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Li H, Jiang Z, Cao X, Su H, Shao H, Jin F, Zheng L, Abd El-Aty AM, Wang J. SPE/GC–MS Determination of 2-Pyrrolidone, N-Methyl-2-pyrrolidone, and N-Ethyl-2-pyrrolidone in Liquid Pesticide Formulations. Chromatographia 2017. [DOI: 10.1007/s10337-017-3435-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Gałęzowska G, Cieszynska-Semenowicz M, Okrągła E, Szychowska K, Wolska L. Progress in Analytical Techniques for Determination of Urine Components. SEPARATION AND PURIFICATION REVIEWS 2017. [DOI: 10.1080/15422119.2017.1281826] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Grażyna Gałęzowska
- Department of Environment Toxicology, Faculty of Health Science, Medical University of Gdansk, Gdansk, Poland
| | | | - Emilia Okrągła
- Department of Environment Toxicology, Faculty of Health Science, Medical University of Gdansk, Gdansk, Poland
| | - Katarzyna Szychowska
- Department of Environment Toxicology, Faculty of Health Science, Medical University of Gdansk, Gdansk, Poland
| | - Lidia Wolska
- Department of Environment Toxicology, Faculty of Health Science, Medical University of Gdansk, Gdansk, Poland
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Schindler BK, Koslitz S, Meier S, Belov VN, Koch HM, Weiss T, Brüning T, Käfferlein HU. Quantification of Four Major Metabolites of Embryotoxic N-Methyl- and N-Ethyl-2-pyrrolidone in Human Urine by Cooled-Injection Gas Chromatography and Isotope Dilution Mass Spectrometry. Anal Chem 2012; 84:3787-94. [DOI: 10.1021/ac300439w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Birgit K. Schindler
- Institute for Prevention and
Occupational Medicine of the German Social Accident Insurance, Ruhr-University Bochum (IPA), Bürkle-de-la-Camp
Platz 1, 44789 Bochum, Germany
| | - Stephan Koslitz
- Institute for Prevention and
Occupational Medicine of the German Social Accident Insurance, Ruhr-University Bochum (IPA), Bürkle-de-la-Camp
Platz 1, 44789 Bochum, Germany
| | - Swetlana Meier
- Institute for Prevention and
Occupational Medicine of the German Social Accident Insurance, Ruhr-University Bochum (IPA), Bürkle-de-la-Camp
Platz 1, 44789 Bochum, Germany
| | - Vladimir N. Belov
- Max Planck Institute for Biophysical Chemistry, Facility for Synthetic Chemistry,
Am Fassberg 11, 37077 Göttingen, Germany
| | - Holger M. Koch
- Institute for Prevention and
Occupational Medicine of the German Social Accident Insurance, Ruhr-University Bochum (IPA), Bürkle-de-la-Camp
Platz 1, 44789 Bochum, Germany
| | - Tobias Weiss
- Institute for Prevention and
Occupational Medicine of the German Social Accident Insurance, Ruhr-University Bochum (IPA), Bürkle-de-la-Camp
Platz 1, 44789 Bochum, Germany
| | - Thomas Brüning
- Institute for Prevention and
Occupational Medicine of the German Social Accident Insurance, Ruhr-University Bochum (IPA), Bürkle-de-la-Camp
Platz 1, 44789 Bochum, Germany
| | - Heiko U. Käfferlein
- Institute for Prevention and
Occupational Medicine of the German Social Accident Insurance, Ruhr-University Bochum (IPA), Bürkle-de-la-Camp
Platz 1, 44789 Bochum, Germany
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Determination of N-methyl-2-pyrrolidone and its metabolites in urine by micellar electrokinetic chromatography. OPEN CHEM 2011. [DOI: 10.2478/s11532-011-0062-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractA fast and accurate micellar electrokinetic capillary chromatography (MEKC) method was developed for monitoring N-methyl-2-pyrrolidone (NMP) exposure. Baseline separation of NMP and its main metabolites: 5-hydroxy-N-methyl-2-pyrrolidone (5HNMP), N-methylsuccinimide (MSI), 2-hydroxy-N-methylsuccinimide (2HMSI), and 2-pyrrolidone (2P) was obtained within 6 min in an uncoated fused silica capillary using 5 mM phosphate buffer and 140 mM sodium dodecyl sulfate (pH 7.1) as background electrolyte (BGE). On-line UV-detection was performed at 200 nm and the applied electric field was 400 V cm−1. Possible interference of BGE-induced system peaks on separation was investigated by computer simulation and no such interference was observed. The developed MEKC method combined with solid phase extraction for sample preparation was successfully applied to the analysis of urine of rats exposed to NMP. The urinary excretion was determined in 0–6 h and 6–24 h specimens collected after an intragastic administration of 308 mg NMP / kg rat body weight. The results of NMP disposition kinetics in rat urine are reported for NMP and metabolites.
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Corredera L, Bayarri S, Pérez-Arquillué C, Lázaro R, Molino F, Herrera A. Multiresidue determination of carcinogenic polycyclic aromatic hydrocarbons in honey by solid-phase extraction and high-performance liquid chromatography. J Food Prot 2011; 74:1692-9. [PMID: 22004817 DOI: 10.4315/0362-028x.jfp-11-140] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An analytical procedure based on solid-phase extraction, using ethyl acetate as the elution solvent, and high-performance liquid chromatography with fluorescence and diode array detection was developed for the identification and quantification of polycyclic aromatic hydrocarbons (PAHs) in honey. The method has been optimized and validated in accordance with Commission Regulation 333/2007 and Commission Decision 2002/657/EC. This method allows the identification of the 15 PAHs that should be monitored in food matrices, as proposed in 2002 by the Scientific Committee on Food and later by the European Union in the Commission Recommendation 2005/108/EC, because of their genotoxic and carcinogenic properties. The results of the validation study were in agreement with quality criteria described in European legislation in terms of sensitivity, accuracy, and ruggedness, and the method was applied to the analysis of 42 honey samples (21 from Spain and 21 from other regions). The honey samples were not contaminated by PAHs at detectable levels and thus could be marketed without health risk.
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Affiliation(s)
- Lourdes Corredera
- Departamento de Producción Animal y Ciencia de los Alimentos, Universidad de Zaragoza, Facultad de Veterinaria, C/ Miguel Servet 177, 50013 Zaragoza, Spain.
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Zolfaghari A, Mortaheb HR, Meshkini F. Removal of N-Methyl-2-pyrrolidone by Photocatalytic Degradation in a Batch Reactor. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200702b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alireza Zolfaghari
- Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
| | | | - Fatemeh Meshkini
- Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
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Validated hydrophilic interaction LC-MS/MS method for determination of 2-pyrrolidinone residue: applied to a depletion study of 2-pyrrolidinone in swine liver. Anal Bioanal Chem 2010; 399:1371-80. [DOI: 10.1007/s00216-010-4395-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 10/24/2010] [Accepted: 10/26/2010] [Indexed: 11/25/2022]
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Suzuki Y, Endo Y, Ogawa M, Yamamoto S, Takeuchi A, Nakagawa T, Onda N. Direct determination of N-methyl-2-pyrrolidone metabolites in urine by HPLC-electrospray ionization-MS/MS using deuterium-labeled compounds as internal standard. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3743-7. [DOI: 10.1016/j.jchromb.2009.08.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2009] [Revised: 08/21/2009] [Accepted: 08/25/2009] [Indexed: 10/20/2022]
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