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Houser CL, Fenner KN, Lawrence BP. Timing influences the impact of aryl hydrocarbon receptor activation on the humoral immune response to respiratory viral infection. Toxicol Appl Pharmacol 2024; 489:117010. [PMID: 38901696 PMCID: PMC11240840 DOI: 10.1016/j.taap.2024.117010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 06/05/2024] [Accepted: 06/15/2024] [Indexed: 06/22/2024]
Abstract
Humoral responses to respiratory viruses, such as influenza viruses, develop over time and are central to protection from repeated infection with the same or similar viruses. Epidemiological and experimental studies have linked exposures to environmental contaminants that bind the aryl hydrocarbon receptor (AHR) with modulated antibody responses to pathogenic microorganisms and common vaccinations. Other studies have prompted investigation into the potential therapeutic applications of compounds that activate AHR. Herein, using two different AHR ligands [2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and 2-(1H-Indol-3-ylcarbonyl)-4-thiazolecarboxylic acid methyl ester (ITE), to modulate the duration of AHR activity, we show that the humoral response to viral infection is dependent upon the duration and timing of AHR signaling, and that different cellular elements of the response have different sensitivities. When AHR activation was initiated prior to infection with influenza A virus, there was suppression of all measured elements of the humoral response (i.e., the frequency of T follicular helper cells, germinal center B cells, plasma cells, and circulating virus-specific antibody). However, when the timing of AHR activation was adjusted to either early (days -1 to +5 relative to infection) or later (days +5 onwards), then AHR activation affected different aspects of the overall humoral response. These findings highlight the importance of considering the timing of AHR activation in relation to triggering an immune response, particularly when targeting the AHR to manipulate disease processes.
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Affiliation(s)
- Cassandra L Houser
- Department of Microbiology & Immunology, University of Rochester, Rochester NY14642, USA
| | - Kristina N Fenner
- Department of Environmental Medicine, University of Rochester, Rochester NY14642, USA
| | - B Paige Lawrence
- Department of Microbiology & Immunology, University of Rochester, Rochester NY14642, USA; Department of Environmental Medicine, University of Rochester, Rochester NY14642, USA.
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2
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Behnisch P, Besselink H, Suzuki G, Buchinger S, Reifferscheid G, Lukas M, Wollenweber M, Wollenweber S, Hollert H, Kunisue T, Tue NM, Alijagic A, Larsson M, Engwall M, Ohno K, Brouwer A. Results of an international interlaboratory study on dioxin-like activities in drinking-, river surface- and wastewater using DR CALUX bioassay. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:170759. [PMID: 38336065 DOI: 10.1016/j.scitotenv.2024.170759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/04/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
Aquatic animals and consumers of aquatic animals are exposed to increasingly complex mixtures of known and as-yet-unknown chemicals with dioxin-like toxicities in the water cycle. Effect- and cell-based bioanalysis can cover known and yet unknown dioxin and dioxin-like compounds as well as complex mixtures thereof but need to be standardized and integrated into international guidelines for environmental testing. In an international laboratory testing (ILT) following ISO/CD 24295 as standard procedure for rat cell-based DR CALUX un-spiked and spiked extracts of drinking-, surface-, and wastewater were validated to generate precision data for the development of the full ISO-standard. We found acceptable repeatability and reproducibility ranges below 36 % by DR CALUX bioassay for the tested un-spiked and spiked water of different origins. The presence of 17 PCDD/Fs and 12 dioxin-like PCBs was also confirmed by congener-specific GC-HRMS analysis. We compared the sum of dioxin-like activity levels measured by DR CALUX bioassay (expressed in 2,3,7,8-TCDD Bioanalytical Equivalents, BEQ; ISO 23196, 2022) with the obtained GC-HRMS chemical analysis results converted to toxic equivalents (TEQ; van den Berg et al., 2013).
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Affiliation(s)
- Peter Behnisch
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands.
| | - Harrie Besselink
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands
| | - Go Suzuki
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies (NIES), Tsukuba 305-8506, Japan
| | - Sebastian Buchinger
- Bundesanstalt für Gewässerkunde (BfG), Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Georg Reifferscheid
- Bundesanstalt für Gewässerkunde (BfG), Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Marcus Lukas
- Wastewater Analysis, Monitoring Methods, German Environment Agency (UBA), Berlin, Germany
| | - Marc Wollenweber
- Goethe University Frankfurt/Main (GU), Department Evolutionary Ecology and Environmental Toxicology, Max-von-Laue-Strasse 13, 60438 Frankfurt/Main, Germany
| | - Simone Wollenweber
- Goethe University Frankfurt/Main (GU), Department Evolutionary Ecology and Environmental Toxicology, Max-von-Laue-Strasse 13, 60438 Frankfurt/Main, Germany
| | - Henner Hollert
- Goethe University Frankfurt/Main (GU), Department Evolutionary Ecology and Environmental Toxicology, Max-von-Laue-Strasse 13, 60438 Frankfurt/Main, Germany; Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Department Environmental Media Related Ecotoxicology, Auf dem Aberg 1, 57392 Schmallenberg, Germany
| | - Tatsuya Kunisue
- Center for Marine Environmental Studies (CMES), Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Nguyen Minh Tue
- Center for Marine Environmental Studies (CMES), Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Andi Alijagic
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University (ORU), SE-701 82 Örebro, Sweden
| | - Maria Larsson
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University (ORU), SE-701 82 Örebro, Sweden
| | - Magnus Engwall
- Man-Technology-Environment Research Centre (MTM), School of Science and Technology, Örebro University (ORU), SE-701 82 Örebro, Sweden
| | - Kayo Ohno
- Center of International Cooperation and Environmental Technologies of the Japan Environmental Management Association for Industry (JEMAI), 3-1, Uchisaiwaicho 1-chome Chiyoda-ku, Tokyo, Japan
| | - Abraham Brouwer
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands; VU University Amsterdam (VU), Faculty of Sciences, Department of Animal Ecology, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands.
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3
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Behnisch P, Petrlik J, Budin C, Besselink H, Felzel E, Strakova J, Bell L, Kuepouo G, Gharbi S, Bejarano F, Jensen GK, DiGangi J, Ismawati Y, Speranskaya O, Da M, Pulkrabova J, Gramblicka T, Brabcova K, Brouwer A. Global survey of dioxin- and thyroid hormone-like activities in consumer products and toys. ENVIRONMENT INTERNATIONAL 2023; 178:108079. [PMID: 37453209 DOI: 10.1016/j.envint.2023.108079] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 07/18/2023]
Abstract
BACKGROUND Children and consumers are exposed to increasingly complex mixtures of known and as-yet-unknown toxic chemicals from toys and products. However traditional chemical analysis methods only evaluate a small number of chemicals at a time thereby restricting consumer awareness of the full range of potentially harmful chemicals in products. METHODS We used high-throughput effect-based non-animal methods to investigate exposures to complex chemical mixtures of several kinds of brominated flame retardants (BFRs) for their dioxin- and thyroid hormone-like activities in various kinds of consumer products and toys from 26 different countries, on four continents (Africa, America, Asia and Europe) in combination with chemical analysis of various polybrominated flame retardants (BFRs) and their impurities (such as polyhalogenated PCDD/Fs and PBDD/Fs). RESULTS We found high levels of polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs) in toys and now, for the first time, also in consumer products that are manufactured from black plastics containing certain brominated flame retardants (BFRs). The presence of PBDD/PBDFs as well as other BFRs in various black plastic materials from additional countries as well as additional kinds of consumer products as confirmed by effect-based in vitro reporter gene DR CALUX and TTR-TRβ CALUX assays as well as congener-specific chemical analysis. We compared total Toxicity Equivalent (TEQ) levels of PBDD/F-TEQs analysed by chemical analysis to by CALUX bioassay measured Biological equivalence (BEQ) concentrations (for further info see at ISO 23196, ISO, 2022). In the case of TBBPA, both chemical and TTR-TRβ CALUX analysis measure direct the amount of TBBPA. Finally, the daily ingestion of 2,3,7,8-TCDD equivalents from PBDD/Fs-contaminated plastic toys by child mouthing habits have been related to our earlier study (Budin et al., 2020). CONCLUSIONS Interaction of children with such contaminated plastics may significantly contribute to the daily uptake of dioxin- and thyroid hormone transport disrupting-like compounds. Effect-based bioassays for dioxin- and thyroid hormone-like activities are relevant to pick-out such complex mixtures of known and yet unknown (and therefore not regulated) substances for safer and more sustainable plastics. Low POPs Content Levels and other mechanisms set under the Basel and Stockholm Conventions are set far too high to prevent a significant flow of BFRs and PBDD/Fs into consumer products.
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Affiliation(s)
- Peter Behnisch
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands
| | - Jindrich Petrlik
- Arnika, Toxics and Waste Programme, Seifertova 85, 13000 Prague, Czech Republic; International Pollutants Elimination Network (IPEN), 40010 Gothenburg, Sweden
| | - Clemence Budin
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands
| | - Harrie Besselink
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands
| | - Emiel Felzel
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands
| | - Jitka Strakova
- Arnika, Toxics and Waste Programme, Seifertova 85, 13000 Prague, Czech Republic; International Pollutants Elimination Network (IPEN), 40010 Gothenburg, Sweden
| | - Lee Bell
- International Pollutants Elimination Network (IPEN), 40010 Gothenburg, Sweden
| | - Gilbert Kuepouo
- Centre de Recherche et d'Education pour le Développement (CREPD), 00000 Yaoundé, Cameroon
| | - Semia Gharbi
- Association d'Education Environnementale pour les Futures Générations (AEEFG), 2070 Tunis, Tunisia
| | - Fernando Bejarano
- Red de Acción sobre Plaguicidas y Alternativas en México (RAPAM), 56120 San Juanito, Texcoco, Estado de México, México
| | - Génon K Jensen
- The Health and Environment Alliance (HEAL), 1040 Brussels, Belgium
| | - Joseph DiGangi
- International Pollutants Elimination Network (IPEN), 40010 Gothenburg, Sweden
| | | | | | - Mao Da
- Shenzhen Zero Waste, 518000 Shenzhen, China
| | - Jana Pulkrabova
- University of Chemistry and Technology, Prague, Faculty of Food and Biochemical Technology, Department of Food Analysis and Nutrition, Technicka 3, 166 28 Prague 6, Czech Republic
| | - Tomas Gramblicka
- University of Chemistry and Technology, Prague, Faculty of Food and Biochemical Technology, Department of Food Analysis and Nutrition, Technicka 3, 166 28 Prague 6, Czech Republic
| | - Karolina Brabcova
- Arnika, Toxics and Waste Programme, Seifertova 85, 13000 Prague, Czech Republic
| | - Abraham Brouwer
- BioDetection Systems B.V. (BDS), Science Park 406, 1098 XH Amsterdam, the Netherlands; VU University Amsterdam, Faculty of Sciences, Department of Animal Ecology, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands.
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4
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Liberatori G, Mazzoli C, Ferraro F, Sturba L, Vannuccini ML, Baroni D, Behnisch PA, Puccini M, Vitolo S, Corsi I. Aryl hydrocarbon reporter gene bioassay for screening polyhalogenated dibenzo-p-dioxins/furans and dioxin-like polychlorinated biphenyls in hydrochar and sewage sludge. JOURNAL OF HAZARDOUS MATERIALS 2022; 428:128256. [PMID: 35038666 DOI: 10.1016/j.jhazmat.2022.128256] [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: 10/19/2021] [Revised: 01/05/2022] [Accepted: 01/08/2022] [Indexed: 06/14/2023]
Abstract
The suitability of the AhR reporter gene bioassays to screen the presence of polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) in sewage sludge (SL) and related hydrochar (HC) was here investigated. Samples of SL obtained from six WWTPs were processed by hydrothermal carbonization to obtain the resultant HCs and both tested with DR-CALUX® bioassay. Levels of PCDD/Fs and dl-PCBs were also determined analytically in the same samples by GC-MS/MS. Bioanalytical Toxicity Equivalent values (BEQ) resulted in one order of magnitude higher in HC compared to SL samples and those obtained from the dl-PCBs fraction higher than those from PCDD/Fs. BEQ and TEQWHO values, the latter obtained by GC-MS/MS analysis on the same matrices, were highly correlated showing also a similar trend in the six WWTPs (RS= 0.8252, p < 0.001; Pearson's R RP =0.8029, p < 0.01). The suitability of AhR bioassays and in particular of the DR-CALUX® to screen the presence and biological activity of legacy organohalogen compounds in both SL and HC matrices was demonstrated for the first time which support their usage for the assessment of potential risks associated with their further environmental applications.
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Affiliation(s)
- Giulia Liberatori
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy.
| | - Carola Mazzoli
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
| | - Fabrizio Ferraro
- pH TÜV Italia srl, Loc. Sambuca Tavarnelle Val di Pesa, Florence, Italy
| | - Lucrezia Sturba
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
| | - Maria Luisa Vannuccini
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
| | - Davide Baroni
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
| | | | - Monica Puccini
- Department of Civil and Industrial Engineering, University of Pisa, Pisa, Italy
| | - Sandra Vitolo
- Department of Civil and Industrial Engineering, University of Pisa, Pisa, Italy
| | - Ilaria Corsi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
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5
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Zhan MX, Liu YW, Ye WW, Chen T, Jiao WT. Modification of activated carbon using urea to enhance the adsorption of dioxins. ENVIRONMENTAL RESEARCH 2022; 204:112035. [PMID: 34509483 DOI: 10.1016/j.envres.2021.112035] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Activated carbon is commonly used to remove dioxins from flue gas via adsorption. Improving the targeted adsorption capacity of activated carbon for dioxins can reduce the consumption of adsorbents and help achieve emission standards for target pollutants. Here, commercial coal-based activated carbon was used as a raw material and modified by urea impregnation along with treatment at high temperature under a nitrogen atmosphere. It was found that modification with urea effectively improved the pore structure of activated carbon while incorporating a certain amount of nitrogen. The best modification effect was achieved at a modification temperature of 600 °C, an impregnation ratio of urea to activated carbon of 1:1, and with high-temperature treatment for 2 h. The mesopore volume of the modified activated carbon (AC600) reached 0.38 cm3/g, accounting for 57.58% of the total pore volume. With an impregnation ratio of urea to activated carbon of 1:1, high-temperature treatment for 2 h, and a modification temperature of 800 °C, a certain amount of nitrogen was introduced into the carbon rings to form a modified activated carbon (AC800) rich in pyridine and pyrrole groups (atomic percentage = 4.84%). The activated carbon modified by urea and the unmodified activated carbon were subsequently selected for dioxin adsorption experiments using a dioxin generation and adsorption system. AC600 showed the highest adsorption efficiency for dioxins, reaching 97.65%, based on toxicity equivalents. Although AC800 has poor pore properties, it has more pyridine and pyrrole groups than AC600. Consequently, the efficiency of AC800 at adsorbing low-concentration dioxins reached 85.24% based on toxicity equivalents. Overall, this study describes two mechanisms for effectively modifying activated carbon with urea based on (1) optimizing the pore structure of activated carbon and (2) incorporating nitrogen.
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Affiliation(s)
- Ming-Xiu Zhan
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, 310018, Zhejiang Province, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, China 18 Shuangqing Road, Haidian District, Beijing, 100085, China
| | - Yu-Wei Liu
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, China; Shanghai SUS Environmental Co. Ltd., 9 Songqiu Road, Qingpu District, Shanghai, 201703, China
| | - Wen-Wen Ye
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, 310018, Zhejiang Province, China
| | - Tong Chen
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, China
| | - Wen-Tao Jiao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, China 18 Shuangqing Road, Haidian District, Beijing, 100085, China.
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6
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Landi C, Liberatori G, Cotugno P, Sturba L, Vannuccini ML, Massari F, Miniero DV, Tursi A, Shaba E, Behnisch PA, Carleo A, Di Giuseppe F, Angelucci S, Bini L, Corsi I. First Attempt to Couple Proteomics with the AhR Reporter Gene Bioassay in Soil Pollution Monitoring and Assessment. TOXICS 2021; 10:toxics10010009. [PMID: 35051051 PMCID: PMC8779689 DOI: 10.3390/toxics10010009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/22/2021] [Accepted: 12/24/2021] [Indexed: 11/16/2022]
Abstract
A topsoil sample obtained from a highly industrialized area (Taranto, Italy) was tested on the DR-CALUX® cell line and the exposed cells processed with proteomic and bioinformatics analyses. The presence of polyhalogenated compounds in the topsoil extracts was confirmed by GC-MS/MS analysis. Proteomic analysis of the cells exposed to the topsoil extracts identified 43 differential proteins. Enrichment analysis highlighted biological processes, such as the cellular response to a chemical stimulus, stress, and inorganic substances; regulation of translation; regulation of apoptotic process; and the response to organonitrogen compounds in light of particular drugs and compounds, extrapolated by bioinformatics all linked to the identified protein modifications. Our results confirm and reflect the complex epidemiological situation occurring among Taranto inhabitants and underline the need to further investigate the presence and sources of inferred chemicals in soils. The combination of bioassays and proteomics reveals a more complex scenario of chemicals able to affect cellular pathways and leading to toxicities rather than those identified by only bioassays and related chemical analysis. This combined approach turns out to be a promising tool for soil risk assessment and deserves further investigation and developments for soil monitoring and risk assessment.
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Affiliation(s)
- Claudia Landi
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; (C.L.); (E.S.)
| | - Giulia Liberatori
- Department of Physical, Earth and Environmental Sciences, University of Siena, 53100 Siena, Italy; (G.L.); (L.S.); (M.L.V.)
| | - Pietro Cotugno
- Department of Biology, University of Bari Aldo Moro, 70121 Bari, Italy; (P.C.); (F.M.); (D.V.M.); (A.T.)
| | - Lucrezia Sturba
- Department of Physical, Earth and Environmental Sciences, University of Siena, 53100 Siena, Italy; (G.L.); (L.S.); (M.L.V.)
| | - Maria Luisa Vannuccini
- Department of Physical, Earth and Environmental Sciences, University of Siena, 53100 Siena, Italy; (G.L.); (L.S.); (M.L.V.)
| | - Federica Massari
- Department of Biology, University of Bari Aldo Moro, 70121 Bari, Italy; (P.C.); (F.M.); (D.V.M.); (A.T.)
| | - Daniela Valeria Miniero
- Department of Biology, University of Bari Aldo Moro, 70121 Bari, Italy; (P.C.); (F.M.); (D.V.M.); (A.T.)
| | - Angelo Tursi
- Department of Biology, University of Bari Aldo Moro, 70121 Bari, Italy; (P.C.); (F.M.); (D.V.M.); (A.T.)
| | - Enxhi Shaba
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; (C.L.); (E.S.)
| | - Peter A. Behnisch
- BioDetection System BV (BDS) Amsterdam, 1098 XH Amsterdam, The Netherlands;
| | - Alfonso Carleo
- Department of Pulmonology, Hannover Medical School, 30625 Hannover, Germany;
| | - Fabrizio Di Giuseppe
- Department of Medical, Oral & Biotechnological Sciences, Dentistry and Biotechnology and Proteomics Unit, Centre of Advanced Studies and Technology, “G. D’Annunzio”, University of Chieti-Pescara, 66100 Chieti, Italy; (F.D.G.); (S.A.)
| | - Stefania Angelucci
- Department of Medical, Oral & Biotechnological Sciences, Dentistry and Biotechnology and Proteomics Unit, Centre of Advanced Studies and Technology, “G. D’Annunzio”, University of Chieti-Pescara, 66100 Chieti, Italy; (F.D.G.); (S.A.)
| | - Luca Bini
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; (C.L.); (E.S.)
- Correspondence: (L.B.); (I.C.); Tel.: +39-0577-234938 (L.B.); +39-0577-232169 (I.C.)
| | - Ilaria Corsi
- Department of Physical, Earth and Environmental Sciences, University of Siena, 53100 Siena, Italy; (G.L.); (L.S.); (M.L.V.)
- Correspondence: (L.B.); (I.C.); Tel.: +39-0577-234938 (L.B.); +39-0577-232169 (I.C.)
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7
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Liberatori G, Cotugno P, Sturba L, Vannuccini ML, Capasso G, Velardo R, Besselink H, Massari F, Tursi A, Corbelli V, Behnisch PA, Corsi I. Occurrence and spatial distribution of dioxin and dioxin-like compounds in topsoil of Taranto (Apulia, Italy) by GC-MS analysis and DR-CALUX® bioassay. CHEMOSPHERE 2021; 279:130576. [PMID: 33894519 DOI: 10.1016/j.chemosphere.2021.130576] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 04/02/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
The aim of the present study was to assess the occurrence and spatial distribution of PCDD/Fs and dioxin-like compounds in topsoils of Taranto (Apulia Region), one of the most heavily industrialized and contaminated area of Southern Italy. A combined approach of chemical analysis by GC-MS/MS and AhR reporter gene bioassay was applied in a subset of topsoil samples (n = 20) collected in 2017-18 from ten sites embracing three levels of risk (from high to low) in the framework of a large survey inside Taranto municipality. TCDD-BEQs and GC-MS/MS TEQWHO and TEQTHEORETICAL revealed a decreasing trend with the distance from main industrial settings and landfill areas. A strong correlation between TCDD-BEQs and TEQWHO values (R2 = 0.85) and TEQTHEORETICAL (R2 = 0.88) was also found. In 3 out of 10 topsoil investigated, BEQs and TEQWHO/THEORETICAL resulted above Italian National Regulatory Limits for ∑PCDD/Fs in green, private and recreational used soils (10 ng TEQ/kg d.w. D.Lgs 152/2006) and for ∑PCDD/F/dl-PCBs in agricultural and farming soil (6 ng TEQ/kg d.w. D.M. 46/2019). GC-MS/MS pattern revealed the highest prevalence of dl-PCBs in 6 out of 10 sites, followed by PCDFs and PCDDs. Those sites are all located in proximity of main industrial steel and iron ore sinter plant, steel plant's landfills and illegal dumping sites. An update on occurrence and spatial distribution of PCDD/Fs and dl-PCBs contamination of Taranto urban soils was obtained and the DR-CALUX® bioassay was further recommended as a suitable screening tool for environmental and human risk assessment.
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Affiliation(s)
- Giulia Liberatori
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy.
| | - Pietro Cotugno
- Department of Biology, University of Bari Aldo Moro, Bari, Italy
| | - Lucrezia Sturba
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
| | - Maria Luisa Vannuccini
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
| | - Gennaro Capasso
- Special Commissioner for Urgent Intervention for Remediation, Environmental Enhancement and Upgrading of Taranto, Taranto, Italy
| | - Raffaele Velardo
- Special Commissioner for Urgent Intervention for Remediation, Environmental Enhancement and Upgrading of Taranto, Taranto, Italy
| | | | - Federica Massari
- Department of Biology, University of Bari Aldo Moro, Bari, Italy
| | - Angelo Tursi
- Department of Biology, University of Bari Aldo Moro, Bari, Italy
| | - Vera Corbelli
- Special Commissioner for Urgent Intervention for Remediation, Environmental Enhancement and Upgrading of Taranto, Taranto, Italy
| | | | - Ilaria Corsi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy
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8
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Yang L, Liu G, Shen J, Wang M, Yang Q, Zheng M. Environmental characteristics and formations of polybrominated dibenzo-p-dioxins and dibenzofurans. ENVIRONMENT INTERNATIONAL 2021; 152:106450. [PMID: 33684732 DOI: 10.1016/j.envint.2021.106450] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/23/2020] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
Polybrominated dibenzo-p-dioxins and furans (PBDD/Fs) are emerging persistent organic pollutants (POPs) that have similar or higher toxicities than the notorious dioxins. Toxicities, formation mechanisms, and environmental fates of PBDD/Fs are lacking because accurate quantification, especially of higher brominated congeners, is challenging. PBDD/F analysis is difficult because of photolysis and thermal degradation and interference from polybrominated diphenyl ethers. Here, literatures on PBDD/F analysis and environmental occurrences are reviewed to improve our understanding of PBDD/F environmental pollution and human exposure levels. Although PBDD/Fs behave similarly to dioxins, different congener profiles between PBDD/Fs and dioxins in the environment indicates their different sources and formation mechanisms. Herein, potential sources and formation mechanisms of PBDD/Fs were critically discussed, and current knowledge gaps and future directions for PBDD/F research are highlighted. An understanding of PBDD/F formation pathways will allow for development of synergistic control strategies for PBDD/Fs, dioxins, and other dioxin-like POPs.
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Affiliation(s)
- Lili Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Guorui Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China; School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310000, China; College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jia Shen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Minxiang Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Qiuting Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Minghui Zheng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China; School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310000, China; Institute of Environment and Health, Jianghan University, Wuhan 430056, China.
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9
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Torti MF, Giovannoni F, Quintana FJ, García CC. The Aryl Hydrocarbon Receptor as a Modulator of Anti-viral Immunity. Front Immunol 2021; 12:624293. [PMID: 33746961 PMCID: PMC7973006 DOI: 10.3389/fimmu.2021.624293] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 02/03/2021] [Indexed: 12/30/2022] Open
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor, which interacts with a wide range of organic molecules of endogenous and exogenous origin, including environmental pollutants, tryptophan metabolites, and microbial metabolites. The activation of AHR by these agonists drives its translocation into the nucleus where it controls the expression of a large number of target genes that include the AHR repressor (AHRR), detoxifying monooxygenases (CYP1A1 and CYP1B1), and cytokines. Recent advances reveal that AHR signaling modulates aspects of the intrinsic, innate and adaptive immune response to diverse microorganisms. This review will focus on the increasing evidence supporting a role for AHR as a modulator of the host response to viral infection.
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Affiliation(s)
- Maria Florencia Torti
- Laboratory of Antiviral Strategies, Biochemistry Department, School of Sciences, University of Buenos Aires, IQUIBICEN-Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Federico Giovannoni
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Francisco Javier Quintana
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Cybele Carina García
- Laboratory of Antiviral Strategies, Biochemistry Department, School of Sciences, University of Buenos Aires, IQUIBICEN-Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
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10
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Wang C, Zhai SN, Yuan XG, Zhang DW, Jiang H, Qiu L, Fu YX. Common differentially expressed proteins were found in mouse cleft palate models induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin and retinoic acid. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2019; 72:103270. [PMID: 31586870 DOI: 10.1016/j.etap.2019.103270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 08/20/2019] [Accepted: 09/26/2019] [Indexed: 06/10/2023]
Abstract
Cleft palate(CP) is a widely studied congenital malformation. However, its etiology and pathogenesis still remain unclear. Proteins are fundamental molecules that participate in every biological process within cells. In this study, we established CP mouse models induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and retinoic acid (RA), using proteomics technology isobaric tags for relative and absolute quantitation (iTRAQ) to investigate the key proteins in the formation of CP. Pregnant mice were given a gavage of TCDD 28μg/kg or retinoic acid 80mg/kg of body weight or equivalent corn oil at gestational day 10.5(GD10.5) and sacrificed at GD 17.5. Foetal mice were recorded and collected for further detection. Western blot was performed to verify the iTRAQ results. Eventually, we obtained 18 common differentially expressed proteins in TCDD group and RA group compared with normal control, 17 up-regulated and 1 down-regulated. 14-3-3sigma and Annexin A1 were up-regulated in experimental groups at GD17.5, which was consistent with Western blot. We speculated that the common differentially expressed proteins might be one of the molecular mechanisms in the formation of cleft palate.
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Affiliation(s)
- Chen Wang
- Department of Burns and Plastic Surgery, Children's hospital of Soochow University, Suzhou 215000 PR China
| | - Sha-Na Zhai
- Department of Pediatrics, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai 200080 PR China
| | - Xin-Gang Yuan
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, PR China; Department of Burns and Plastic Surgery, Children's Hospital of Chongqing Medical University, Chongqing 400014 PR China
| | - Ding-Wen Zhang
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, PR China; Department of Burns and Plastic Surgery, Children's Hospital of Chongqing Medical University, Chongqing 400014 PR China
| | - Heng Jiang
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, PR China; Department of Burns and Plastic Surgery, Children's Hospital of Chongqing Medical University, Chongqing 400014 PR China
| | - Lin Qiu
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, PR China; Department of Burns and Plastic Surgery, Children's Hospital of Chongqing Medical University, Chongqing 400014 PR China.
| | - Yue-Xian Fu
- Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, PR China; Department of Burns and Plastic Surgery, Children's Hospital of Chongqing Medical University, Chongqing 400014 PR China.
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11
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Deng D, Qiao J, Liu M, Kołodyńska D, Zhang M, Dionysiou DD, Ju Y, Ma J, Chang MB. Detoxification of municipal solid waste incinerator (MSWI) fly ash by single-mode microwave (MW) irradiation: Addition of urea on the degradation of Dioxin and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:279-289. [PMID: 30780024 DOI: 10.1016/j.jhazmat.2019.01.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 12/28/2018] [Accepted: 01/01/2019] [Indexed: 06/09/2023]
Abstract
The detoxification of municipal solid waste incinerator (MSWI) fly ash dioxins urgently requires an effective treatment technology. In this study, we adopted a single-mode microwave (MW)-based pyrolysis to treat MSWI fly ash under N2 atmosphere and further elucidated the main influencing factors, including the chemical inhibitor, for dioxin control. The results show that (1) the detoxification process was optimized with a mass ratio of fly ash to SiC of 1:9, 23.1% (wt%) urea addition and pyrolysis temperature of ˜ 480 °C; (2) the total polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) destruction efficiency and the bioassay-derived 2,3,7,8-TCDD toxic equivalent (Bio-TEQ) removal efficiency reached 98.5% and 97.9%, respectively, accompanied with ˜ 1.3% of the total amount of dioxin being submitted to exhaust gas; (3) the MW-based pyrolysis of urea (133˜300 °C) was favourable for the generation of hot spots as well as the PCDD/F rapid destruction in fly ash. In addition, the leaching toxicity of heavy metals was also partially reduced after MW pyrolysis reactions. To the best of our knowledge, this is the first report adopting a MW-based pyrolysis to eliminate dioxin in MSWI fly ash with the addition of urea, which is a promising alternative to current methods.
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Affiliation(s)
- Dongyang Deng
- South China Institute of Environmental Sciences, Ministry of Environmental Protection (MEP), Guangzhou 510655, PR China; Innovative Laboratory for Environmental Functional Materials and Environmental Applications of Microwave Irradiation, South China Subcenter of State Environmental Dioxin Monitoring Center, Ministry of Environmental Protection (MEP), Guangzhou 510655, PR China; Guangdong Key Laboratory of Water and Air Pollution Control, Guangzhou 510655, PR China
| | - Junqin Qiao
- Center of Material Analysis, Nanjing University, Jiangsu Province, Nanjing 210093, PR China
| | - Mingqing Liu
- South China Institute of Environmental Sciences, Ministry of Environmental Protection (MEP), Guangzhou 510655, PR China
| | - Dorota Kołodyńska
- Department of Inorganic Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq.2. 20-031 Lublin, Poland
| | - Manwen Zhang
- South China Institute of Environmental Sciences, Ministry of Environmental Protection (MEP), Guangzhou 510655, PR China; Innovative Laboratory for Environmental Functional Materials and Environmental Applications of Microwave Irradiation, South China Subcenter of State Environmental Dioxin Monitoring Center, Ministry of Environmental Protection (MEP), Guangzhou 510655, PR China
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DChEE), University of Cincinnati, Cincinnati, OH, 45221-0012, USA
| | - Yongming Ju
- South China Institute of Environmental Sciences, Ministry of Environmental Protection (MEP), Guangzhou 510655, PR China; Innovative Laboratory for Environmental Functional Materials and Environmental Applications of Microwave Irradiation, South China Subcenter of State Environmental Dioxin Monitoring Center, Ministry of Environmental Protection (MEP), Guangzhou 510655, PR China; Guangdong Key Laboratory of Water and Air Pollution Control, Guangzhou 510655, PR China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China
| | - Moo-Been Chang
- Graduate Institute of Environmental Engineering, National Central University, Chungli 320, Taiwan.
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12
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Gul N, Khan B, Khan H, Israr M. Dioxin leaching risk assessment through selected soils by estimating distribution coefficient and breakthrough curves. ENVIRONMENTAL MONITORING AND ASSESSMENT 2018; 190:649. [PMID: 30338404 DOI: 10.1007/s10661-018-7043-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/08/2018] [Indexed: 06/08/2023]
Abstract
From health and environmental point of views, dioxins are important due to their toxicity and persistence. Dioxins have the potential to reside in the environment for longer time if sorbed onto the clay and organic content of the soil matrix. Their transport or leaching under certain environmental conditions such as preferential flow can increase the risk of groundwater contamination. In the current study, breakthrough curves (BTCs) against time were plotted for selected dioxin transport prediction; based on measured distribution coefficient (Kd), dispersion coefficient (D), and retardation factor (R). Three representative soil series named Burhan, Warsak, and Kunda were selected. For dibenzo-p-dioxin (DD), Kd values followed the order as: Burhan> Warsak > Kunda, while for 2-chloro dibenzo-p-dioxin (2 Cl-DD), Kd values followed an order as: Kunda > Burhan > Warsak. Dioxin transport was measured at two different linear velocities (20 and 50 cm day-1). Attainment of equilibrium was verified to be dependent upon the Kd, R, D, and chlorination on dioxin. Kunda series with low OM (0.6%), clay (0.2%), and R (377) was found to have relatively high DD transport potential under normal velocity, due to high dispersion values for its sandy nature. Under the steady or preferential flow conditions, all the plots obtained were identical irrespective of soil type and dioxin nature.
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Affiliation(s)
- Nida Gul
- Department of Environmental Sciences, University of Peshawar, Peshawar, Pakistan.
| | - Bushra Khan
- Department of Environmental Sciences, University of Peshawar, Peshawar, Pakistan
| | - Hizbullah Khan
- Department of Environmental Sciences, University of Peshawar, Peshawar, Pakistan
| | - Muhammad Israr
- Department of Environmental Sciences, University of Peshawar, Peshawar, Pakistan
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13
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Kojima H, Takeuchi S, Iida M, Nakayama SF, Shiozaki T. A sensitive, rapid, and simple DR-EcoScreen bioassay for the determination of PCDD/Fs and dioxin-like PCBs in environmental and food samples. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:7101-7112. [PMID: 26087926 DOI: 10.1007/s11356-015-4662-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Accepted: 05/04/2015] [Indexed: 06/04/2023]
Abstract
In developing countries in Asia, such as China, Vietnam, and Thailand, there is a strong need for the development of relatively rapid and low-cost bioassays for the determination of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (DL-PCBs) in environmental and food samples. These compounds are known to induce a variety of toxic and biological effects through their ligand-specific binding of the aryl hydrocarbon receptor (AhR). Indeed, several AhR-mediated reporter gene assays are widely used as prescreening tools for high-resolution gas chromatography/high-resolution mass spectrometry (HRGC-HRMS) analysis, which individually measures 17 PCDD/Fs and 12 DL-PCBs. In 2008, we have developed a new sensitive and rapid reporter gene assay using a genetically engineered stable cell line, designated DR-EcoScreen cells. The DR-EcoScreen assay using these cells has a number of great advantages of its sensitivity to 2,3,7,8-tetrachlorodibenzo-p-dioxin and its simple procedure, which shows little variance in the data (within CV 10 %) compared to other reporter gene assays. In this review, we summarize the application of the DR-EcoScreen assay to the determination of PCDD/Fs and DL-PCBs in ambient air samples, in fish and shellfish samples, and in flue gas samples from incinerators and provide potential usefulness of this bioassay for the determination of PCDD/Fs and DL-PCBs in various matrices.
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Affiliation(s)
- Hiroyuki Kojima
- Hokkaido Institute of Public Health, Kita-19, Nishi-12, Kita-ku, Sapporo, 060-0819, Japan.
| | - Shinji Takeuchi
- Hokkaido Institute of Public Health, Kita-19, Nishi-12, Kita-ku, Sapporo, 060-0819, Japan
| | - Mitsuru Iida
- Otsuka Pharmaceutical Company Ltd, 224-18 Ebisuno Hiraishi, Kawauchi-cho, Tokushima, 771-0195, Japan
| | - Shoji F Nakayama
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Takuya Shiozaki
- Environmental Sanitation Center, 10-6 Yotsuyakami-cho, Kawasaki-ku, Kawasaki, 210-0828, Japan
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14
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Liu ZJ, Shi ZL, Tu C, Zhang HZ, Gao D, Li CY, He Q, Li RS, Guo YM, Niu M, Zhang CE, Ren YS, Zhen HS, Wang JB, Xiao XH. An activity-calibrated chemical standardization approach for quality evaluation of Salvia miltiorrhiza Bge. RSC Adv 2017. [DOI: 10.1039/c6ra26281c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Low content does not always represent low biopotency and vice versa.
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15
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Tavakoly Sany SB, Narimani L, Soltanian FK, Hashim R, Rezayi M, Karlen DJ, Mahmud HNME. An overview of detection techniques for monitoring dioxin-like compounds: latest technique trends and their applications. RSC Adv 2016. [DOI: 10.1039/c6ra11442c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Dioxin-like compounds (DLCs) are considered as persistent bioaccumulative toxicants with a number of continuing issues in the fields of ecotoxicology and bioassay.
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Affiliation(s)
| | - Leila Narimani
- Chemistry Department
- Faculty of Science
- University Malaya
- 50603 Kuala Lumpur
- Malaysia
| | | | - Rosli Hashim
- Institute of Biological Sciences University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Majid Rezayi
- Chemistry Department
- Faculty of Science
- University Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - David J. Karlen
- Environmental Protection Commission of Hillsborough County
- Tampa
- USA
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16
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Hsu WT, Hung PC, Chang MB. Catalytic destruction vs. adsorption in controlling dioxin emission. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 46:257-264. [PMID: 26350401 DOI: 10.1016/j.wasman.2015.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 07/11/2015] [Accepted: 09/01/2015] [Indexed: 06/05/2023]
Abstract
This study investigates the removal efficiencies of PCDD/Fs achieved with a catalytic filter (CF) and with activated carbon injection followed by bag filter (ACI+BF) as applied in an industrial waste incinerator (IWI) and a hazardous waste incinerator (HWI), respectively. Catalytic filtration has been successfully applied to remove PCDD/Fs from gas streams. Comparing the CF to the ACI+BF system, it appears that the PCDD/F removal efficiency achieved with a CF is higher than that of an ACI+BF system. The PCDD/F emissions from both incinerators are well controlled to meet the regulatory limit of 0.1 ng I-TEQ/Nm(3). Additionally, the PCDD/F concentration in BF ash is higher than the regulation limit of Taiwan (1.0 ng I-TEQ/g). In contrast, the PCDD/F concentration in CF ash is only 0.274 ng I-TEQ/g. The difference is attributed to the fact that the ACI+BF system just transfers PCDD/Fs from gas phase to solid phase and further increases the PCDD/F concentration in fly ash, while CF technology effectively destroys the gas-phase PCDD/Fs. Therefore, the disposal of the fly ash discharged from CF would be less expensive compared with the fly ash discharged from the ACI+BF system. In this study, the PCDD/F emission factors of both incinerators are also established.
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Affiliation(s)
- Wei Ting Hsu
- Graduate Institute of Environmental Engineering, National Central University, 300 Jhong-da Road, Jhongli, Taoyuan 32001, Taiwan, Republic of China
| | - Pao Chen Hung
- Graduate Institute of Environmental Engineering, National Central University, 300 Jhong-da Road, Jhongli, Taoyuan 32001, Taiwan, Republic of China
| | - Moo Been Chang
- Graduate Institute of Environmental Engineering, National Central University, 300 Jhong-da Road, Jhongli, Taoyuan 32001, Taiwan, Republic of China.
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17
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Schiwy A, Brinkmann M, Thiem I, Guder G, Winkens K, Eichbaum K, Nüßer L, Thalmann B, Buchinger S, Reifferscheid G, Seiler TB, Thoms B, Hollert H. Determination of the CYP1A-inducing potential of single substances, mixtures and extracts of samples in the micro-EROD assay with H4IIE cells. Nat Protoc 2015; 10:1728-41. [DOI: 10.1038/nprot.2015.108] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Saeed A, Altarawneh M, Dlugogorski BZ. Formation of mixed halogenated dibenzo-p-dioxins and dibenzofurans (PXDD/Fs). CHEMOSPHERE 2015; 137:149-156. [PMID: 26159067 DOI: 10.1016/j.chemosphere.2015.06.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 05/27/2015] [Accepted: 06/11/2015] [Indexed: 06/04/2023]
Abstract
This contribution investigates mechanistic and kinetic parameters pertinent to formation of mixed dibenzo-p-dioxins and dibenzofurans (PXDD/Fs) from the condensation reactions involving 2-chlorophenoxy (2-CPxy) and 2-bromophenoxy (2-BPxy) radicals. Keto-ether structures act as direct intermediates for the formation of DD, 1-MCDD, 1-MBDD, 1-B,6-CDD and 1-B,9-CDD molecules. Likewise, diketo adducts initiate the formation of 4-MCDF, 4-MBDF and 4-B,6-CDF compounds through interconversion and rearrangement reactions. As formation mechanisms of halogenated dibenzo-p-dioxins and dibenzofurans from precursors of brominated and chlorinated phenols are insensitive to substitution at meta and para sites, our mechanistic and kinetic analysis of reactions involving 2-BPxy and 2-CPxy should also apply to higher halogenated phenoxy radicals.
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Affiliation(s)
- Anam Saeed
- School of Engineering and Information Technology, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - Mohammednoor Altarawneh
- School of Engineering and Information Technology, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia.
| | - Bogdan Z Dlugogorski
- School of Engineering and Information Technology, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
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19
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Yudkovski Y, Herut B, Shefer E, Tom M. Dioxin-like biological activity of organic extracts from sediments and fish livers sampled along the Israeli Mediterranean and Red Sea coasts. MARINE POLLUTION BULLETIN 2015; 98:295-300. [PMID: 26165935 DOI: 10.1016/j.marpolbul.2015.06.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 06/24/2015] [Accepted: 06/25/2015] [Indexed: 06/04/2023]
Abstract
This study provides, for the first time, a baseline evaluation of dioxin-like biological activity in sediments and fish sampled in- and adjacent to anchorages along the Mediterranean and Red Sea coasts of Israel. It indicates the effect of past pollution, still present in the sediments of older Israeli harbors, with putative contribution of still existing sources of pollution. A commercial reporter gene bioassay was used to evaluate the biological activity of dioxin-like compounds extracted from the samples. HRGC/HRMS analysis of several samples contributed a profile of dioxin-like compounds in sediments and fish. The results point out 1,2,3,4,6,7,8-HeptaCDD, 2,3,4,6,7,8-HexaCDF, 1,2,3,4,6,7,8-HeptaCDF, РСВ-126 and РСВ-118 as major contributors to the dioxin-like activity in sediments. It indicates polychlorinated biphenyls non-selective absorption in fish livers, in contrary to a biased accumulation of poorly chlorinated and more potent dibenzodioxins and dibenzofurans.
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Affiliation(s)
- Yana Yudkovski
- Israel Oceanographic and Limnological Research, P.O.B. 8030, Haifa 31080, Israel
| | - Barak Herut
- Israel Oceanographic and Limnological Research, P.O.B. 8030, Haifa 31080, Israel
| | - Edna Shefer
- Israel Oceanographic and Limnological Research, P.O.B. 8030, Haifa 31080, Israel
| | - Moshe Tom
- Israel Oceanographic and Limnological Research, P.O.B. 8030, Haifa 31080, Israel.
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20
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Hauler C, Vetter W. A non-targeted gas chromatography/electron capture negative ionization mass spectrometry selected ion monitoring screening method for polyhalogenated compounds in environmental samples. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:619-628. [PMID: 26212279 DOI: 10.1002/rcm.7143] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 12/29/2014] [Accepted: 01/04/2015] [Indexed: 05/24/2023]
Abstract
RATIONALE Many organohalogen compounds with adverse environmental properties have been detected in samples from marine ecosystems. Their quantitation is an important task in environmental analytical chemistry. However, the highly selective gas chromatography/mass spectrometry (GC/MS) selected ion monitoring (SIM) methods developed for this purpose only allow the detection of targeted compounds while unscreened compounds remain undiscovered. The detection of all polyhalogenated compounds in a sample requires the application of non-target methods. METHODS We present a simple quadrupole-based GC/ECNI-MS-SIM method in which the entire high mass range is screened in eight GC runs using three time windows. Recently developed in the GC/EI-MS mode, this approach has now been adapted to the more sensitive GC/ECNI-MS mode. With this method we analyzed a fraction of a dolphin blubber sample from Australia and a sponge sample from the Mediterranean Sea on polychlorinated and polybrominated compounds and compared the results with the corresponding GC/EI-MS measurements. RESULTS The non-targeted GC/ECNI-MS-SIM chromatograms were clearly structured and hardly showed co-elutions. Altogether, >400 polyhalogenated compounds were detected in both samples. Many of them originated from unknown compounds. Several new or scarcely analyzed compounds could be tentatively identified. Most of the compounds were not detected with the non-target GC/EI-MS-SIM approach (~150 compounds detected). We also developed a two-dimensional plot in which the mass of the monoisotopic peak was plotted over the GC retention time and which was helpful for the identification of isomers. CONCLUSIONS Since eight GC runs are required per sample, the method is not aimed for routine analysis. It is recommended as an initial screening method for the analysis of new sample matrices or samples from new regions. The non-targeted GC/ECNI-MS-SIM method benefits from the fact that it can be used with standard equipment.
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Affiliation(s)
- Carolin Hauler
- University of Hohenheim, Institute of Food Chemistry (170 b), Garbenstraße 28, D-70593, Stuttgart, Germany
| | - Walter Vetter
- University of Hohenheim, Institute of Food Chemistry (170 b), Garbenstraße 28, D-70593, Stuttgart, Germany
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21
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Eichbaum K, Brinkmann M, Buchinger S, Reifferscheid G, Hecker M, Giesy JP, Engwall M, van Bavel B, Hollert H. In vitro bioassays for detecting dioxin-like activity--application potentials and limits of detection, a review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 487:37-48. [PMID: 24762647 DOI: 10.1016/j.scitotenv.2014.03.057] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 03/14/2014] [Accepted: 03/14/2014] [Indexed: 05/05/2023]
Abstract
Use of in vitro assays as screening tool to characterize contamination of a variety of environmental matrices has become an increasingly popular and powerful toolbox in the field of environmental toxicology. While bioassays cannot entirely substitute analytical methods such as gas chromatography-mass spectrometry (GC-MS), the increasing improvement of cell lines and standardization of bioassay procedures enhance their utility as bioanalytical pre-screening tests prior to more targeted chemical analytical investigations. Dioxin-receptor-based assays provide a holistic characterization of exposure to dioxin-like compounds (DLCs) by integrating their overall toxic potential, including potentials of unknown DLCs not detectable via e.g. GC-MS. Hence, they provide important additional information with respect to environmental risk assessment of DLCs. This review summarizes different in vitro bioassay applications for detection of DLCs and considers the comparability of bioassay and chemical analytically derived toxicity equivalents (TEQs) of different approaches and various matrices. These range from complex samples such as sediments through single reference to compound mixtures. A summary of bioassay derived detection limits (LODs) showed a number of current bioassays to be equally sensitive as chemical methodologies, but moreover revealed that most of the bioanalytical studies conducted to date did not report their LODs, which represents a limitation with regard to low potency samples.
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Affiliation(s)
- Kathrin Eichbaum
- Institute for Environmental Research, Department of Ecosystem Analysis, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Markus Brinkmann
- Institute for Environmental Research, Department of Ecosystem Analysis, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Sebastian Buchinger
- Federal Institute of Hydrology (BFG), Department G3: Biochemistry, Ecotoxicology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Georg Reifferscheid
- Federal Institute of Hydrology (BFG), Department G3: Biochemistry, Ecotoxicology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Markus Hecker
- School of the Environment & Sustainability and Toxicology Centre, University of Saskatchewan, 44 Campus Drive, SK S7N 5B3 Saskatoon, Canada
| | - John P Giesy
- School of the Environment & Sustainability and Toxicology Centre, University of Saskatchewan, 44 Campus Drive, SK S7N 5B3 Saskatoon, Canada; Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, 44 Campus Drive, SK S7N 5B3 Saskatoon, Canada; Department of Zoology and Center for Integrative Toxicology, Michigan State University, East Lansing, MI, USA; Department of Biology and Chemistry, State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, SAR, China; School of Biological Sciences, University of Hong Kong, Hong Kong, China
| | - Magnus Engwall
- Man-Technology-Environment Research Centre, Deptartment of Natural Sciences, Örebro University, 70182 Örebro, Sweden
| | - Bert van Bavel
- Man-Technology-Environment Research Centre, Deptartment of Natural Sciences, Örebro University, 70182 Örebro, Sweden
| | - Henner Hollert
- Institute for Environmental Research, Department of Ecosystem Analysis, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany; Key Laboratory of Yangtze River Environment of Education Ministry of China, College of Environmental Science and Engineering, Tongji University, Shanghai, China; College of Resources and Environmental Science, Chongqing University, Chongqing 400030, China; School of Environment, Nanjing University, China.
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Lei B, Kang J, Wang X, Yu Y, Zhang X, Wen Y, Wang Y. The levels of PAHs and aryl hydrocarbon receptor effects in sediments of Taihu Lake, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:6547-6557. [PMID: 24497304 DOI: 10.1007/s11356-014-2542-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 01/09/2014] [Indexed: 06/03/2023]
Abstract
A total of 16 priority polycyclic aromatic hydrocarbons (PAHs) in sediment samples from Taihu Lake were analyzed by instruments, and sediment extracts were assayed for aryl hydrocarbon receptor (AhR)-mediated ethoxyresorufin-o-deethylase (EROD) induction using a rat hepatoma cell line (H4IIE). The cause-effect relationship between the observed EROD activity and chemical concentrations of PAHs was examined. Our results showed that sediment extracts could induce significant AhR effects, and the bioassay-derived 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents of raw extracts (TEQ(bio)s) ranged from 2.7 to 39.8 pg g(-1) dw. Chemical analysis showed that 16 PAHs were all detected in all samples, and their total concentrations (Σ16PAHs) ranged from 179.8 to 1,669.4 ng g(-1) dw. The abundance of sedimentary PAHs in the three regions (Meiliang Bay, Gonghu Bay, and Xukou Bay) showed a decreasing trend from the inflow region to the outflow region. Chemical analysis-derived TEQs (TEQ(cal)s) contributed by PAHs ranged from 1.6 to 20.7 pg g(-1) dw. The mean contribution rates (CRs) of PAHs to TEQ(bio)s were 48.9%. In Meiliang Bay, EROD effects of 60% samples were caused by PAHs whose CRs were more than 60%, while in most sampling sites of Gonghu Bay and Xukou Bay, the CRs of PAHs to TEQ(bio)s were basically below 40%. In addition, preliminary ecological risk assessment found that PAHs in sediments have very low ecological impact based on the chemical data of PAHs, while the sediments might pose an unacceptable risk to aquatic organisms and their predators based on the data of TEQ(bio). These findings showed that EROD effects of sediment extracts from Taihu Lake were also caused by other compounds, such as dioxins, polychlorinated biphenyls, etc., together.
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Affiliation(s)
- Bingli Lei
- Institute of Environmental Pollution and Health, College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
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Hung PC, Chang SH, Lin SH, Buekens A, Chang MB. Pilot tests on the catalytic filtration of dioxins. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:3995-4001. [PMID: 24617498 DOI: 10.1021/es404926g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Tests were conducted to study the removal efficiencies (REs) of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) from flue gas during a test program involving a pilot-scale catalytic filter (CF) module and a full-scale municipal solid waste incinerator (MSWI). The REs attained with the CF on a side stream and a conventional activated carbon (AC) injection and baghouse filtration system in the full-scale MSWI are evaluated via simultaneous sampling and analysis of both gas- and particle-phase PCDD/Fs. Flue gas without AC is supplied to the pilot-scale CF module for evaluating its RE capabilities. The REs achieved with the CF at 180 °C are 96.80 and 99.50%, respectively, for the gas phase and the particulate contained. The gas-phase PCDD/F RE rises significantly at 200 and 220 °C. The air/cloth (A/C) ratio defined as is the gas flow rate (m(3)/min) divided by the filtration area (m(2)) also affects the PCDD/F RE, especially in the gas phase. At 180 °C, a RE of gas-phase PCDD/Fs of 95.94% is attained with the CF at 0.8 m/min, yet it decreases at higher A/C ratios (1 and 1.2 m/min). A significantly lower toxic equivalency (TEQ) concentration (0.71 ng I-TEQ/g) was measured in the filter dust of the CF module compared to that collected by the AC adsorption system (4.18 ng I-TEQ/g), apparently because of the destruction of gas-phase PCDD/Fs by the catalyst.
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Affiliation(s)
- Pao Chen Hung
- Institute of Environmental Engineering, National Central University , 300 Jhong-da Road, Jhongli, Taoyuan 32001 Taiwan, Republic of China
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Jiang J, Wang X, Shan Z, Yang L, Zhou J, Bu Y. Proteomic analysis of hepatic tissue of Cyprinus carpio L. exposed to cyanobacterial blooms in Lake Taihu, China. PLoS One 2014; 9:e88211. [PMID: 24558380 PMCID: PMC3928196 DOI: 10.1371/journal.pone.0088211] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 01/08/2014] [Indexed: 11/18/2022] Open
Abstract
With the rapid development of industry and agriculture and associated pollution, the cyanobacterial blooms in Lake Taihu have become a major threat to aquatic wildlife and human health. In this study, the ecotoxicological effects of cyanobacterial blooms on cage-cultured carp (Cyprinus carpio L.) in Meiliang Bay of Lake Taihu were investigated. Microcystins (MCs), major cyanobacterial toxins, have been detected in carp cultured at different experimental sites of Meiliang Bay. We observed that the accumulation of MCs in carp was closely associated with several environmental factors, including temperature, pH value, and density of cyanobacterial blooms. The proteomic profile of carp liver exposed to cyanobacterial blooms was analyzed using two-dimensional difference in-gel electrophoresis (2D-DIGE) and mass spectrometry. The toxic effects of cyanobacterial blooms on carp liver were similar to changes caused by MCs. MCs were transported into liver cells and induced the excessive production of reactive oxygen species (ROS). MCs and ROS inhibited protein phosphatase and aldehyde dehydrogenase (ALDH), directly or indirectly resulting in oxidative stress and disruption of the cytoskeleton. These effects further interfered with metabolic pathways in the liver through the regulation of series of related proteins. The results of this study indicated that cyanobacterial blooms pose a major threat to aquatic wildlife in Meiliang Bay in Lake Taihu. These results provided evidence of the molecular mechanisms underlying liver damage in carp exposed to cyanobacterial blooms.
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Affiliation(s)
- Jinlin Jiang
- Nanjing Institute of Environmental Sciences/Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Environmental Protection, Nanjing, People's Republic of China
- * E-mail: (JJ); (XW)
| | - Xiaorong Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
- * E-mail: (JJ); (XW)
| | - Zhengjun Shan
- Nanjing Institute of Environmental Sciences/Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Environmental Protection, Nanjing, People's Republic of China
| | - Liuyan Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
| | - Junying Zhou
- Nanjing Institute of Environmental Sciences/Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Environmental Protection, Nanjing, People's Republic of China
| | - Yuanqin Bu
- Nanjing Institute of Environmental Sciences/Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Environmental Protection, Nanjing, People's Republic of China
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Huerta Buitrago B, Ferrer Muñoz P, Ribé V, Larsson M, Engwall M, Wojciechowska E, Waara S. Hazard assessment of sediments from a wetland system for treatment of landfill leachate using bioassays. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 97:255-262. [PMID: 24011859 DOI: 10.1016/j.ecoenv.2013.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 06/28/2013] [Accepted: 08/07/2013] [Indexed: 06/02/2023]
Abstract
Four bioassays were used in this study for the hazard assessment of sediments from sediment traps and several ponds in a treatment wetland for landfill leachate at Atleverket, Sweden. In the 6-day solid phase microbiotest with the sediment-dwelling crustacean Heterocypris incongruens both acute and chronic effects were observed with a gradual decrease and loss of toxicity with treatment in the wetland system. Some samples showed a low toxicity in porewater and only one sample was weakly toxic in the whole sediment test when assessed with Aliivibrio fischeri (Vibro fischeri). No genotoxicity was detected in the umu test. The toxicity response in the H4IIE- luc test evaluating the presence of dioxin-like compounds was considerably higher in the samples from the sediment traps. The hazard of the sediment therefore appears to be highest in the sediment traps and pond 1 with the methods employed. The result indicates that the wetland system has a design supporting the concentration and sequestration of toxic substances in the first part of the wetland. Based upon the results we suggest that hazard assessment of sediments from other treatment wetlands for landfill leachate should be conducted.
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Affiliation(s)
- B Huerta Buitrago
- School of Sustainable Development of Society and Technology, Mälardalen University, Box 883, SE-721 23 Västerås, Sweden.
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New insights into the aryl hydrocarbon receptor as a modulator of host responses to infection. Semin Immunopathol 2013; 35:615-26. [PMID: 23963494 DOI: 10.1007/s00281-013-0395-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 07/16/2013] [Indexed: 12/23/2022]
Abstract
The host response to infection is known to be influenced by many factors, including genetics, nutritional status, age, as well as drug and chemical exposures. Recent advances reveal that the aryl hydrocarbon receptor (AhR) modulates aspects of the innate and adaptive immune response to viral, bacterial, and parasitic organisms. Although many of these observations were made using the high affinity but poorly metabolized AhR agonist 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), not all of the effects are detrimental to the host. Sometimes AhR activation, even with TCDD, was beneficial and improved host resistance and survival. A similar dichotomy is observed in infected AhR-deficient mice, wherein absence of functional AhR sometimes, but not always, alters host resistance. When examined in their totality, current data indicate that AhR controls multiple regulatory pathways that converge with infection-associated signals and depending on the context (e.g., type of pathogen, site of infection), lead to distinct outcomes. This creates numerous exciting opportunities to harness the immunomodulatory action of AhR to transform host responses to infection. Moreover, since many of the mechanisms cued in response to infectious agents are pivotal in the context of other diseases, there is much to be learned about AhR's cellular targets and molecular mechanisms of action.
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van den Berg M, Denison MS, Birnbaum LS, Devito MJ, Fiedler H, Falandysz J, Rose M, Schrenk D, Safe S, Tohyama C, Tritscher A, Tysklind M, Peterson RE. Polybrominated dibenzo-p-dioxins, dibenzofurans, and biphenyls: inclusion in the toxicity equivalency factor concept for dioxin-like compounds. Toxicol Sci 2013; 133:197-208. [PMID: 23492812 DOI: 10.1093/toxsci/kft070] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
In 2011, a joint World Health Organization (WHO) and United Nations Environment Programme (UNEP) expert consultation took place, during which the possible inclusion of brominated analogues of the dioxin-like compounds in the WHO Toxicity Equivalency Factor (TEF) scheme was evaluated. The expert panel concluded that polybrominated dibenzo-p-dioxins (PBDDs), dibenzofurans (PBDFs), and some dioxin-like biphenyls (dl-PBBs) may contribute significantly in daily human background exposure to the total dioxin toxic equivalencies (TEQs). These compounds are also commonly found in the aquatic environment. Available data for fish toxicity were evaluated for possible inclusion in the WHO-UNEP TEF scheme (van den Berg et al., 1998). Because of the limited database, it was decided not to derive specific WHO-UNEP TEFs for fish, but for ecotoxicological risk assessment, the use of specific relative effect potencies (REPs) from fish embryo assays is recommended. Based on the limited mammalian REP database for these brominated compounds, it was concluded that sufficient differentiation from the present TEF values of the chlorinated analogues (van den Berg et al., 2006) was not possible. However, the REPs for PBDDs, PBDFs, and non-ortho dl-PBBs in mammals closely follow those of the chlorinated analogues, at least within one order of magnitude. Therefore, the use of similar interim TEF values for brominated and chlorinated congeners for human risk assessment is recommended, pending more detailed information in the future.
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Affiliation(s)
- Martin van den Berg
- Institute for Risk Assessment Sciences-IRAS and WHO Collaborating Centre for Environmental Health Risk Assessment, Utrecht University, Utrecht, The Netherlands.
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28
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Evaluation of the use of CALUX results for dioxins and dioxin-like PCBs analysis for quantitative human exposure assessments. Food Control 2012. [DOI: 10.1016/j.foodcont.2011.10.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Archibong E, Wang L, Ivanov I, Lita A, Redda K, Mateeva N. Investigation of the binding of dioxin selective pentapeptides to a polyaniline matrix. SYNTHETIC METALS 2012; 162:1255-1263. [PMID: 30381782 PMCID: PMC6205211 DOI: 10.1016/j.synthmet.2012.04.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Polyaniline in form of emeraldine salt and emeraldine base was used as a matrix to attach several labeled and non-labeled dioxin selective pentapeptides both directly to the polymer and using glutaraldehyde as a linker. The peptides have been selected as a model to study the binding process due to their smaller size, lower sensitivity to the environment and potential application as solid state extraction reagents for chlorinated toxins. The composition and the properties of the compounds were investigated by means of elemental analysis, XPS, FTIR, UV/vis, and fluorescence spectroscopy. The results have shown that 3.30-7.76% peptides were attached to the emeraldine base both with and without a linker. Glutaraldehyde and the peptides were connected to the matrix via chemical bond resulting in formation of compounds whit similar composition and stability in a broad pH range. The influence of the linker and the peptides on the electronic properties and composition of the polymer have been investigated by principal component analysis.
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Affiliation(s)
- Edikan Archibong
- Department of Chemistry, Florida A&M University, Tallahassee, FL 32307, United States
| | - Ling Wang
- Department of Chemistry, Florida A&M University, Tallahassee, FL 32307, United States
| | - Ivan Ivanov
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843-4466, United States
| | - Adrian Lita
- Department of Chemistry, Florida A&M University, Tallahassee, FL 32307, United States
| | - Kinfe Redda
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, United States
| | - Nelly Mateeva
- Department of Chemistry, Florida A&M University, Tallahassee, FL 32307, United States
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He G, Tsutsumi T, Zhao B, Baston DS, Zhao J, Heath-Pagliuso S, Denison MS. Third-generation Ah receptor-responsive luciferase reporter plasmids: amplification of dioxin-responsive elements dramatically increases CALUX bioassay sensitivity and responsiveness. Toxicol Sci 2011; 123:511-22. [PMID: 21775728 DOI: 10.1093/toxsci/kfr189] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD, dioxin) and related dioxin-like chemicals are widespread and persistent environmental contaminants that produce diverse toxic and biological effects through their ability to bind to and activate the Ah receptor (AhR) and AhR-dependent gene expression. The chemically activated luciferase expression (CALUX) system is an AhR-responsive recombinant luciferase reporter gene-based cell bioassay that has been used in combination with chemical extraction and cleanup methods for the relatively rapid and inexpensive detection and relative quantitation of dioxin and dioxin-like chemicals in a wide variety of sample matrices. Although the CALUX bioassay has been validated and used extensively for screening purposes, it has some limitations when screening samples with very low levels of dioxin-like chemicals or when there is only a small amount of sample matrix for analysis. Here, we describe the development of third-generation (G3) CALUX plasmids with increased numbers of dioxin-responsive elements, and stable transfection of these new plasmids into mouse hepatoma (Hepa1c1c7) cells has produced novel amplified G3 CALUX cell bioassays that respond to TCDD with a dramatically increased magnitude of luciferase induction and significantly lower minimal detection limit than existing CALUX-type cell lines. The new G3 CALUX cell lines provide a highly responsive and sensitive bioassay system for the detection and relative quantitation of very low levels of dioxin-like chemicals in sample extracts.
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Affiliation(s)
- Guochun He
- Department of Environmental Toxicology, University of California, Davis, California 95616, USA
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Wang Liulin, Hou Meiling, An Jing, Zhong Yufang, Wang Xuetong, Wang Yangjun, Wu Minghong, Bi Xinhui, Sheng Guoying, Fu Jiamo. The cytotoxic and genetoxic effects of dust and soil samples from E-waste recycling area on L02 cells. Toxicol Ind Health 2011; 27:831-9. [DOI: 10.1177/0748233711399313] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Electrical and electronic waste (E-waste) has now become the fastest growing solid waste around the world. Primitive recycling operations for E-waste have resulted in severe contamination of toxic metals and organic chemicals in the related areas. In this study, six dust and soil samples collected from E-waste recycling workshops and open-burning sites in Longtang were analyzed to investigate their cytotoxicity and genotoxicity on L02 cells. These six samples were: dust No. 1 collected at the gate of the workshop; dust No. 2 collected from air conditioning compressor dismantling site; dust No. 3 collected from where some motors, wires, and aluminium products since the 1980s were dismantled; soil No. 1 collected at the circuit board acid washing site; soil No. 2 collected from a wire open-burning site; soil No. 3 collected near a fiber open-burning site. At the same time, two control soil samples were collected from farmlands approximately 8 km away from the dismantling workshops. The results showed that all of these samples could inhibit cell proliferation and cause cell membrane lesion, among which dust No. 3 and soil No. 2 had the strongest toxicity. Moreover, the comet assay showed that the dust No. 3 had the most significant capability to cause DNA single-strand beaks (SSB), while the road dust (dust No. 1) collected at the gate of the workshop, a relatively farer site, showed the slightest capability to induce DNA SSB. The intracellular reactive oxygen species (ROS) detection showed that ROS level was elevated with the increase of dust and soil samples concentration. Dust No. 3 and soil No. 2 had the highest ROS level, followed by dust No. 2 and 1, soil No. 3 and 1. All of the above results indicated that polluted soil and dust from the E-waste area had cytotoxicity and genotoxicity on L02 cells, the mechanism might involve the increased ROS level and consequent DNA SSB.
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Affiliation(s)
- Wang Liulin
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China
| | - Hou Meiling
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China
| | - An Jing
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China,
| | - Zhong Yufang
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China
| | - Wang Xuetong
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China
| | - Wang Yangjun
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China
| | - Wu Minghong
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, People's Republic of China
| | - Bi Xinhui
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Sheng Guoying
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Fu Jiamo
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China
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Levy W, Henkelmann B, Bernhöft S, Bovee T, Buegger F, Jakobi G, Kirchner M, Bassan R, Kräuchi N, Moche W, Offenthaler I, Simončič P, Weiss P, Schramm KW. Persistent aryl hydrocarbon receptor inducers increase with altitude, and estrogen-like disrupters are low in soils of the Alps. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2011; 18:99-110. [PMID: 20574780 DOI: 10.1007/s11356-010-0361-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Accepted: 06/07/2010] [Indexed: 05/29/2023]
Abstract
BACKGROUND Soil samples from remote Alpine areas were analyzed for polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans and polychlorinated biphenyls by high-resolution gas chromatography/high-resolution gas spectrometry. Additionally, the EROD micro-assay and a genetically modified yeast estrogen bioassay were carried out to determine persistent aryl hydrocarbon receptors (AhR) and estrogen receptors (ER) agonists, respectively. Regarding the AhR agonists, the toxicity equivalents of analytical and EROD determined values were compared, targeting both altitude of samples and their soil organic content. The ratio between bioassay derived equivalents and analytical determinations suggested no significant contribution of unknown AhR inducers in these sampling sites and some antagonism in soils with relatively high PCB loading. More CYP1A1 expression was induced at the highest sites or about 1400-1500 m a.s.l. along the altitude profiles. Surprisingly, no clear tendencies with the soil organic content were found for dioxin-like compounds. Mean values obtained in the present study were for ER agonists, 2: 0.37±0.12ng 17ß-estradiol EQ g-1 dry soil [corrected] and 6.1 ± 4.2 pg TCDD-EQ g⁻¹ dry soil for AhR agonists. CONCLUSION Low bioassay responses with a higher relative amount of ER disrupters than AhR inducers were detected,indicating the higher abundance of estrogen-like than persistent dioxin-like compounds in these forested areas [corrected].
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Affiliation(s)
- Walkiria Levy
- Institute of Ecological Chemistry, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany.
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Fei XC, Song C, Gao HW. Transmembrane transports of acrylamide and bisphenol A and effects on development of zebrafish (Danio rerio). JOURNAL OF HAZARDOUS MATERIALS 2010; 184:81-88. [PMID: 20810209 DOI: 10.1016/j.jhazmat.2010.08.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 07/08/2010] [Accepted: 08/04/2010] [Indexed: 05/29/2023]
Abstract
Acrylamide (AA) and bisphenol A (BPA) are two kinds of pollutants with different structures and polarities. AA found in fried and toasted starchy foods can cause developmental and reproductive toxicity and BPA has neuro-, immuno- and developmental toxicities. Their transports in zebrafish (Danio rerio) embryos were determined and their toxicity characteristics observed. Approximately 70% of AA was concentrated on the outer membrane surface probably via hydrogen bonds and van der Waals forces, but only 0.3% of AA entered the cytoplasm. In contrast, over 10% of the BPA adsorbed to the cells entered the cytoplasm via the membrane by lipid-water partition. The hydrophilic AA and hydrophobic BPA used different cell transport pathways; AA accumulated on the outer membrane surface whereas BPA readily reached the cytoplasm. AA caused acute and indirect toxicity in developing cells, including serious malnutrition and axial malformation. BPA caused chemical damage to developing cells by causing pericardial edema. The antagonistic effect of the AA/BPA mixture's combinational toxicity to embryos was found and explained by the accumulation of AA on the out surface of membrane inhibiting the transfer of BPA to the cytoplasm.
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Affiliation(s)
- Xun-Chang Fei
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor 48104, USA
| | - Chao Song
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Hong-Wen Gao
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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Abstract
Dioxins and Human ToxicityThe term dioxins usually refers to polychlorinated dibenzo-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). As 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD) has the highest toxic potential, the toxic potentials of other PCDDs and PCDFs are defined in comparison with it. Human exposure to dioxins can be environmental (background), occupational, or accidental pollution. In the human body, dioxins are in part metabolised and eliminated, and the rest is stored in body fat. People vary in their capacity to eliminate TCDD, but it is also dose-dependent; the elimination rate is much faster at higher than lower levels. The liver microsomal P4501A1 enzyme oxygenates lipophilic chemicals such as dioxins. It is encoded by the CYP1A1 gene. Cytosolic aryl hydrocarbon receptor (AhR) mediates their carcinogenic action. It binds to dioxin, translocates to nucleus and together with hydrocarbon nuclear translocator (ARNT) and xenobiotic responsive element (XRE) increases the expression of CYP1A1.Dioxins are classified as known human carcinogens, but they also cause noncancerous effects like atherosclerosis, hypertension, and diabetes. Long-term exposures to dioxins cause disruption of the nervous, immune, reproductive, and endocrine system. Short-term exposure to high levels impairs the liver function and causes chloracne. The most sensitive population to dioxin exposure are the foetuses and infants.A large number of health effects have been documented in the scientific literature, and they all place dioxins among the most toxic chemicals known to man.
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Tue NM, Suzuki G, Takahashi S, Isobe T, Trang PTK, Viet PH, Tanabe S. Evaluation of dioxin-like activities in settled house dust from Vietnamese E-waste recycling sites: relevance of polychlorinated/brominated dibenzo-p-dioxin/furans and dioxin-like PCBs. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:9195-9200. [PMID: 21058701 DOI: 10.1021/es102505j] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Few studies have investigated the human exposure to the ensemble of dioxin-related compounds (DRCs) released from uncontrolled e-waste recycling, especially from a toxic effect standpoint. This study evaluated the TCDD toxic equivalents (TEQs) in persistent extracts of settled house dust from two Vietnamese e-waste recycling sites (EWRSs) using the Dioxin-Responsive Chemically Activated LUciferase gene eXpression assay (DR-CALUX), combined with chemical analysis of PCDD/Fs, DL-PCBs, PBDD/Fs, and monobromo PCDD/Fs to determine their TEQ contribution. The CALUX-TEQ levels in house dust ranged from 370 to 1000 pg g(-1) in the EWRSs, approximately 3.5-fold higher than in the urban control site. In EWRS house dust, the concentrations of the unregulated PBDFs were 7.7-63 ng g(-1), an order of magnitude higher than those of regulated DRCs (PCDD/Fs and DL-PCBs), and PBDFs were also principal CALUX-TEQ contributors (4.2-22%), comparable to PCDD/Fs (8.1-29%). The CALUX-TEQ contribution of DRCs varied, possibly depending on thermal processing activities (higher PCDD/F-TEQs) and PBDE content in the waste (higher PBDF-TEQs). However, the percentage of unknown dioxin-like activities was high in all dust samples, indicating large contribution from unidentified DRCs and/or synergy among contaminants. Estimates of TEQ intake from dust ingestion suggest that children in the EWRSs may be adversely affected by DRCs from dust.
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Affiliation(s)
- Nguyen M Tue
- Center for Marine Environmental Studies, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
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Takigami H, Suzuki G, Sakai SI. Screening of dioxin-like compounds in bio-composts and their materials: chemical analysis and fractionation-directed evaluation of AhR ligand activities using an in vitro bioassay. ACTA ACUST UNITED AC 2010; 12:2080-7. [PMID: 20938504 DOI: 10.1039/c0em00200c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Application of the dioxin responsive-chemical activated luciferase gene expression (DR-CALUX) bioassay to three compost products (kitchen garbage compost, treated sludge compost, and poultry manure compost) and their organic waste materials was performed for the screening of dioxin-like compounds. Phased sample preparation was conducted for the bioassay to yield separate crude, acid-stable, and carbon column fractions. Chemical analyses were also conducted for polychlorinated dibenzo-p-dioxin and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and polyaromatic hydrocarbons (PAHs). Their determined WHO-PCDD/PCDF/dl-PCB-TEQ values were compared to the DR-CALUX results expressed as CALUX-TEQ to ascertain their contributions to overall activity. Overall all three compost products were polluted to a low level by persistent PCDD/PCDF/dl-PCBs in a few pg/g WHO-TEQ concentration range. The organic crude fraction showed non-persistent CALUX-TEQ values 2-4 orders of magnitude higher than those of WHO-TEQ. For the acid-resistant fractions of all samples, persistent CALUX-TEQ values were 1-8-fold higher than WHO-PCDD/PCDF/dl-PCB-TEQ values. Both TEQs correlated well for this fraction, which confirms the availability of CALUX for estimation of the actual WHO-TEQ level of the samples using reflux method with 44% sulfuric acid/silica gel, although the compost and material samples examined in this study contained much lower levels of WHO-TEQ: less than 1 pg/g in almost all cases. Additional carbon column treatment enhanced the potency and efficacy of CALUX activity in the three compost samples, which showed 1.6-4.4 times higher values of CALUX-TEQ than those obtained for the acid-resistant fraction. Although further DR-CALUX data collection for compost samples will be necessary, DR-CALUX is useful as a rapid screening method for monitoring dioxin-like compounds in compost.
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Affiliation(s)
- Hidetaka Takigami
- Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
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Vorderstrasse BA, Cundiff JA, Lawrence BP. Developmental exposure to the potent aryl hydrocarbon receptor agonist 2,3,7,8-tetrachlorodibenzo-p-dioxin Impairs the cell-mediated immune response to infection with influenza a virus, but enhances elements of innate immunity. J Immunotoxicol 2009; 1:103-12. [PMID: 18958643 DOI: 10.1080/15476910490509244] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Based on demonstrated effects on functional immunity in rodent models and supportive evidence from epidemiological studies, it is apparent that developmental exposure to ligands for the aryl hydrocarbon receptor (AhR) has the potential to impair immunity in human populations. Furthermore, due to the high levels of these compounds detected in human breast milk, and the fact that they cross the placenta, it is clear that humans are exposed to AhR ligands during fetal and neonatal development. The current studies were conducted to further characterize the relationship between developmental exposure to TCDD, the most potent AhR agonist, and defects in immune function later in life. Impregnated C57Bl/6 mice were treated with 4 doses of 1 mircog/kg TCDD, given on days 0, 7, and 14 of pregnancy, and 2 days after parturition. Functional immunity was assessed by challenging the adult offspring with influenza virus. Both male and female offspring of the TCDD-treated dams demonstrated impairment of the adaptive immune response, as evidenced by suppressed numbers of T cells and IFNgamma-producing cells in the draining lymph nodes and reduced T cell recruitment to the lung. In contrast, the inflammatory response, including infection-associated pulmonary neutrophilia and IFNgamma levels, was significantly elevated in the developmentally-exposed mice. These functional defects in immunity were not correlated with defects in hematopoeisis, as immune cells in the bone marrow, spleen, and thymus were phenotypically normal in uninfected mice. These results support the idea that immune alterations that arise during development cause persistent and significant changes in immune function.
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Affiliation(s)
- Beth A Vorderstrasse
- Department of Pharmaceutical Sciences, Pharmacology/Toxicology Program, and Center for Reproductive Biology, Washington State University, Pullman, Washington, USA
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Luo J, Ma M, Zha J, Wang Z. Characterization of aryl hydrocarbon receptor agonists in sediments of Wenyu River, Beijing, China. WATER RESEARCH 2009; 43:2441-2448. [PMID: 19344927 DOI: 10.1016/j.watres.2009.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Revised: 02/28/2009] [Accepted: 03/04/2009] [Indexed: 05/27/2023]
Abstract
Aryl hydrocarbon receptor agonistic (Ah-agonistic) effects of 23 sediments from Wenyu River in Beijing, China were evaluated using the H4IIE cell bioassay. Five samples were selected for chemical analysis of most concerned Ah-agonists, i.e. polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs). All raw sediment extracts induced significant Ah-agonistic effects, and the bioassay-derived 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) equivalents of raw extracts (TEQ(raw)s) ranged from 8.5 to 336.0 pg/g dry weight (dw). Chemical analysis-derived TEQs (TEQ(chem)s) ranged from 20.5 to 64.8 pg/g dw. When raw extracts were purified by sulphuric acid silica gel column to derive acid stable fraction, the TCDD equivalents in this fraction (TEQ(stable)s) ranged from 2.7 to 63.8 pg/g dw. PCBs, PCDDs and PCDFs contributed about 51.4-72.1%, 1.2-7.3%, and 16.4-34.8% of TEQ(stable)s, respectively, and the sum was 69.1-108.6%. Therefore, about 65.0% of TEQ(raw)s could be attributed to acid labile fraction and only 3.3-9.6% to PAHs. These observations suggested that acid stable fraction and labile fraction contributed together to total Ah-agonistic effects in the sediments, and PCBs and PCDFs might be the two main components in acid stable Ah-agonists. The proposed approach using both H4IIE cell bioassay and chemical analysis could be used for characterization and prioritization of Ah-agonists in river sediments and helpful to the following progression of ecological remediation.
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Affiliation(s)
- Jianping Luo
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Haidian District, Beijing, China
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39
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Ha MH, Ham SY, Lee DH, Choi J. In vitro toxicity assay using human bronchial epithelial cell, Beas-2B, for the screening of toxicological risk of dioxin-like compounds sampled from small sized Korean waste incineration plants. CHEMOSPHERE 2007; 70:20-8. [PMID: 17850846 DOI: 10.1016/j.chemosphere.2007.07.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2007] [Revised: 05/29/2007] [Accepted: 07/15/2007] [Indexed: 05/17/2023]
Abstract
To test the suitability of cell bioassay as a tool for screening the toxicological risk of dioxin-like compounds, an in vitro toxicity assay was performed using samples obtained from small sized Korean waste incineration plants. Stress-related gene expression, cell viability, apoptosis, DNA damage and cell cycles were investigated as toxicological indicators of the polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/DFs) exposed human bronchial epithelial cell, Beas-2B. Of the stress-related genes, the expressions of the aryl hydrocarbon receptor (AhR), cytochrome P450 (CYP) and p53 genes were most significantly induced by exposure to PCDDs/DFs. Exposure of Beas-2B cells to PCDDs/DFs sampled from waste incinerators was sufficient for the expression of noticeable cytotoxic and genotoxic effects. Increased number of cells in the G1 phase in PCDDs/DFs treated samples suggests PCDDs/DFs might lead to alteration in the cell cycle. Statistical tests revealed significant correlations between the PCDDs/DFs concentration and the AhR and CYP gene expression/cell viability/DNA damage. Different from AhR-mediated bioanalytical assay using genetically modified cell line, the present study has been focused on the evaluation of toxicological effects of dioxin-like compounds using normal human cell line. The results of this study have demonstrated that PCDDs/DFs samples from waste incinerators can be applied to cell bioassays for the evaluation of the toxicity of dioxin-like compounds obtained from field samples, and the use of stress-related gene expression assay and cytotoxic/genotoxic test systems would appear to be relevant for preliminary screening of the risk associated with dioxin-like chemicals from waste incinerators.
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Affiliation(s)
- Mi-Hee Ha
- Faculty of Environmental Engineering, College of Urban Science, University of Seoul, Dongdaemun-Gu, Seoul, Republic of Korea
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40
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Activities and identification of aryl hydrocarbon receptor agonists in sediments from the Danube river. Anal Bioanal Chem 2007; 390:2009-19. [PMID: 17938895 DOI: 10.1007/s00216-007-1652-x] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Revised: 09/21/2007] [Accepted: 09/25/2007] [Indexed: 10/22/2022]
Abstract
This study is a consequence of a distinct fish decline in the Danube river since the beginning of the 1990s. In contrast to the decline of fish population, former studies have repeatedly documented that the water quality along the Danube river is improving. However, the conclusion of a pilot study in 2002 was that a high hazard potential is associated with local sediments. The present study documents that sediment samples from the Danube river showed comparatively high aryl hydrocarbon receptor mediated activity in biotests, using the cell lines GPC.2D.Luc, H4IIE (DR-CALUX) and RTL-W1. The combination of chemical analysis, fractionation techniques and different in vitro tests revealed that priority pollutants could not explain the main induction, even though the concentrations of priority polycyclic aromatic hydrocarbons (PAHs) were very high (maximum in the tributary Schwarzach, sum of 16 EPA PAHs 26 mug/g). In conclusion, this investigation shows that nonpriority pollutants mainly mediate the high induction rates. Nevertheless, owing to the effects of PAHs towards fish and the connection between dioxin-like activity and carcinogenicity, the link between contamination and the fish population decline cannot be ruled out.
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Skarek M, Janosek J, Cupr P, Kohoutek J, Novotná-Rychetská A, Holoubek I. Evaluation of genotoxic and non-genotoxic effects of organic air pollution using in vitro bioassays. ENVIRONMENT INTERNATIONAL 2007; 33:859-66. [PMID: 17512055 DOI: 10.1016/j.envint.2007.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2006] [Revised: 03/11/2007] [Accepted: 04/03/2007] [Indexed: 05/15/2023]
Abstract
In this study, organic extracts of total suspended particles (TSP) and the particulate matter (PM) with the size below 2.5 microm (PM(2.5)) combined with organic extracts of the gas phase (GP) collected at two urban and two background localities were analyzed with a bacterial genotoxicity test, SOS chromotest, and an in vitro test for the dioxin toxicity determination, using a modified cell-line of rat hepatoma H4IIE.luc. In addition, the samples of TSP and GP were analyzed for PAHs contents. The PAHs concentrations and both of the toxic activities at the urban localities were much higher than ones at the background localities. Predominantly, traffic was a source of the urban air pollution there which was also confirmed by the evaluation of portions of certain PAHs (BaP/BPE, PYR/BaP) at the localities. On the other hand, the background localities were apparently affected by a long-distance transport of the pollutants from urban and industrial centers. The results of the bioassays indicated potential health risks for the population exposed to the organic air pollutants, especially at the urban localities. Based on the collected samples, distribution of the organic pollutants with the toxic effects in the air was evaluated. The significant portion of the direct genotoxins was bound to the particles larger than 2.5 microm. On the contrary, the indirect genotoxins were bound predominantly to the particles with the size below 2.5 microm. However, in the urban air they may be also bound to the larger particles, as well. While the direct genotoxicity may be related with the presence of PAH-derivatives as well as some polar organic pollutants, the indirect genotoxicity is related with the detected carcinogenic PAHs. But besides the above specified pollutants it is also necessary to consider the presence of other toxic components of the complex organic air pollution mixture that may also show potential health risks. This study demonstrates application of the combination of the screening bioassays for the evaluation of organic air pollution and identification of its health risks.
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Affiliation(s)
- M Skarek
- Research Center for Environmental Chemistry and Ecotoxicology (RECETOX), Faculty of Science, Masaryk University, Kamenice 126/3, 625 00 Brno, Czech Republic
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42
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Hasegawa J, Guruge KS, Seike N, Shirai Y, Yamata T, Nakamura M, Handa H, Yamanaka N, Miyazaki S. Determination of PCDD/Fs and dioxin-like PCBs in fish oils for feed ingredients by congener-specific chemical analysis and CALUX bioassay. CHEMOSPHERE 2007; 69:1188-94. [PMID: 17643474 DOI: 10.1016/j.chemosphere.2007.06.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2007] [Revised: 06/07/2007] [Accepted: 06/11/2007] [Indexed: 05/16/2023]
Abstract
The present research was intended to determine the suitability of the CALUX assay as a screening method for dioxins in fish oil used as a feed ingredient in Japan. Alteration of TEQ in fish oil according to newly proposed toxic equivalency factors (TEF) is also discussed. In the analysis, polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) in 41 fish oil samples were determined by using high-resolution gas chromatography/high-resolution mass spectrometry (HRGC/HRMS) and CALUX bioassay. The mean TEQ values derived from 1998 WHO-TEF of PCDD/Fs and DL-PCBs were 2.6 and 9.9 pg g(-1) (ww), respectively. The levels of TEQ derived from the recently re-evaluated 2005 WHO-TEF were slightly lower than those of the former in both groups. Notably, the contribution of mono-ortho DL-PCBs to total 2005 WHO-TEQ was considerably decreased compared to the case of 1998 WHO-TEQ, resulting from the reduction in its TEF values, while the non-ortho DL-PCBs contribution was increased. The mean TEQ determined by CALUX assay for PCDD/Fs was approximately three times higher, whereas DL-PCBs was approximately two times lower than WHO-TEQ determined by HRGC/HRMS; the sum of PCDD/Fs and DL-PCBs was very similar by both methods. The correlation coefficients of TEQ between the CALUX assay and HRGC/HRMS analysis were 0.84, 0.89, and 0.90 for PCDD/Fs, DL-PCBs, and the sum, respectively. These results suggest that the CALUX assay is a very useful method for the screening of dioxin-related compounds in fish oils.
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Affiliation(s)
- Jun Hasegawa
- Safety Research Team, National Institute of Animal Health, Kannondai 3-1-5, Tsukuba, Ibaraki 305-0856, Japan
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43
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Abstract
Exposure to environmental contaminants has a profound effect on immune function, yet mechanistic understanding of how pollutants deregulate immune responses has, for many chemicals, remained elusive. Available data suggest that certain pollutants alter host immune responses and increase susceptibility to viral infection. In particular, data from a combination of epidemiological and animal studies show that exposure to dioxins, cigarette smoke, diesel exhaust and other air pollutants increase pathology associated with infection. Mechanistically, some of these chemicals disrupt the kinetics and efficacy of innate and adaptive responses to infection, whereas others influence viral latency. While there remain considerable gaps in our knowledge of the complex interactions between viruses, immune cells, and the host environment, these observations indicate that pollutants are important but overlooked contributors to susceptibility and pathogenesis of viral infections.
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Affiliation(s)
- B Paige Lawrence
- Department of Environmental Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York 14642, USA.
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Nording M, Denison MS, Baston D, Persson Y, Spinnel E, Haglund P. Analysis of dioxins in contaminated soils with the calux and caflux bioassays, an immunoassay, and gas chromatography/high-resolution mass spectrometry. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2007; 26:1122-9. [PMID: 17571676 PMCID: PMC2858913 DOI: 10.1897/06-458r.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The chemically activated luciferase expression assay, the chemically activated fluorescence expression assay, and the enzyme-linked immunosorbent assay (ELISA) are all bioanalytical methods that have been used for the detection and quantification of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). However, no comparisons of the results obtained by these three methods have been published analyzing identical replicates of purified sample extracts. Therefore, we have evaluated the performance of each of these methods for analyzing PCDD/Fs in aliquots of extracts from aged-contaminated soil samples and compared the results with those obtained by gas chromatography/high-resolution mass spectrometry (GC/HRMS). The quantitative performance was assessed and the effects of sample purification and data interpretation on the quality of the bioassay results were investigated. Results from the bioanalytical techniques were, in principle, not significantly different from each other or from the GC/HRMS data (p = 0.05). Furthermore, properly used, all of the bioanalytical techniques examined were found to be sufficiently sensitive, selective, and accurate to be used in connection with soil remediation activities when aiming at the remediation goal recommended by the U.S. Environmental Protection Agency (i.e., <1000 pg toxic equivalency/g). However, a site-specific correction factor should be applied with the use of the ELISA to account for differences between the toxic equivalency factors and the ELISA cross-reactivities of the various PCDD/F congeners, which otherwise might significantly underestimate the PCDD/F content.
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Affiliation(s)
- Malin Nording
- Environmental Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
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45
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Song M, Xu Y, Jiang Q, Lam PKS, O'Toole DK, Giesy JP, Jiang G. Determinations of dioxinlike activity in selected mollusks from the coast of the Bohai Sea, China, using the H4IIE-luc bioassay. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2007; 67:157-62. [PMID: 16647118 DOI: 10.1016/j.ecoenv.2006.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Revised: 02/28/2006] [Accepted: 03/04/2006] [Indexed: 05/08/2023]
Abstract
Extracts of mollusks collected from eight cities along the coast of the Bohai Sea, China, were used to determine dioxinlike activity using an in vitro bioassay approach. Dioxinlike activity of total extracts was detected by measuring luciferase activity in a stable transfected rat hepatoma cell line, H4IIE, containing an aryl hydrocarbon receptor (AhR)-responsive element linked to a luciferase reporter gene. Luciferase activity was expressed as a percentage of the maximum response observed for 2,3,7,8-TCDD (% TCDD(max)). All mollusk samples elicited significant dioxinlike activity except those from Dalian (N1). The greatest magnitudes (+/-SD, data ex N1) of activity observed for these extracts ranged from 4.88+/-0.48% to 11.38+/-1.43% TCDD(max). The mean activity was 7.37+/-1.85% TCDD(max). Concentrations of TCDD-EQs in mollusk extracts were from 227.4 to 547.5 pg g(-1) lipid. The cytotoxic effect of the mollusk extracts on cells was assessed at the same time. Six of the mollusk extracts (N2, N3, N4, S1, S2, and S4) caused noticeable growth inhibition over the exposure period at concentrations higher than 0.33% of the extracts concentrations (0.83 microL extract well(-1)). All the dilutions of sample N1 were cytotoxic to the H4IIE cells.
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MESH Headings
- Animals
- Biological Assay/methods
- Cell Line, Tumor
- Cell Survival/drug effects
- China
- Dioxins/analysis
- Dioxins/toxicity
- Dose-Response Relationship, Drug
- Environmental Exposure
- Environmental Monitoring/methods
- Genes, Reporter
- Liver Neoplasms, Experimental/genetics
- Liver Neoplasms, Experimental/metabolism
- Luciferases/biosynthesis
- Luciferases/genetics
- Mollusca/chemistry
- Polychlorinated Dibenzodioxins/toxicity
- Promoter Regions, Genetic/drug effects
- Rats
- Receptors, Aryl Hydrocarbon/drug effects
- Receptors, Aryl Hydrocarbon/metabolism
- Reproducibility of Results
- Seawater
- Transcription, Genetic/drug effects
- Transfection
- Water Pollutants, Chemical/analysis
- Water Pollutants, Chemical/toxicity
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Affiliation(s)
- Maoyong Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
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46
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Lawrence BP, Roberts AD, Neumiller JJ, Cundiff JA, Woodland DL. Aryl Hydrocarbon Receptor Activation Impairs the Priming but Not the Recall of Influenza Virus-Specific CD8+T Cells in the Lung. THE JOURNAL OF IMMUNOLOGY 2006; 177:5819-28. [PMID: 17056506 DOI: 10.4049/jimmunol.177.9.5819] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The response of CD8+ T cells to influenza virus is very sensitive to modulation by aryl hydrocarbon receptor (AhR) agonists; however, the mechanism underlying AhR-mediated alterations in CD8+ T cell function remains unclear. Moreover, very little is known regarding how AhR activation affects anamnestic CD8+ T cell responses. In this study, we analyzed how AhR activation by the pollutant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) alters the in vivo distribution and frequency of CD8+ T cells specific for three different influenza A virus epitopes during and after the resolution of a primary infection. We then determined the effects of TCDD on the expansion of virus-specific memory CD8+ T cells during recall challenge. Adoptive transfer of AhR-null CD8+ T cells into congenic AhR(+/+) recipients, and the generation of CD45.2AhR(-/-)-->CD45.1AhR(+/+) chimeric mice demonstrate that AhR-regulated events within hemopoietic cells, but not directly within CD8+ T cells, underlie suppressed expansion of virus-specific CD8+ T cells during primary infection. Using a dual-adoptive transfer approach, we directly compared the responsiveness of virus-specific memory CD8+ T cells created in the presence or absence of TCDD, which revealed that despite profound suppression of the primary response to influenza virus, the recall response of virus-specific CD8+ T cells that form in the presence of TCDD is only mildly impaired. Thus, the delayed kinetics of the recall response in TCDD-treated mice reflects the fact that there are fewer memory cells at the time of reinfection rather than an inherent defect in the responsive capacity of virus-specific memory CD8+ cells.
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Affiliation(s)
- B Paige Lawrence
- Department of Pharmaceutical Sciences, College of Pharmacy, Washington State University, Pullman, WA 99164, USA.
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47
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Vehlow J, Bergfeldt B, Hunsinger H. PCDD/F and related compounds in solid residues from municipal solid waste incineration--a literature review. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2006; 24:404-20. [PMID: 17121113 DOI: 10.1177/0734242x06066321] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) from waste incineration into the air have been a major focus of interest during the last two decades. An integrated approach to clean waste disposal has to take the occurrence of PCDD/F in all residues into account. This paper compiles published data on concentration ranges of PCDD/F and the related compounds polychlorinated biphenyls (PCB), chlorinated benzenes and phenols, as well as polyaromatic hydrocarbons (PAH) in solid residues from waste incineration in grate furnaces and their development since 1985. A short description of inertization processes for PCDD/F loaded materials is added.
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Affiliation(s)
- Jürgen Vehlow
- Forschungszentrum Karlsruhe GmbH, Institute for Technical Chemistry, Thermal Waste Treatment Division, Karlsruhe, Germany.
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48
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Cho CW, Kim CW. Toxicoproteomics in the study of aromatic hydrocarbon toxicity. BIOTECHNOL BIOPROC E 2006. [DOI: 10.1007/bf02932029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Song M, Jiang Q, Xu Y, Liu H, Lam PKS, O'Toole DK, Zhang Q, Giesy JP, Jiang G. AhR-active compounds in sediments of the Haihe and Dagu Rivers, China. CHEMOSPHERE 2006; 63:1222-30. [PMID: 16325885 DOI: 10.1016/j.chemosphere.2005.08.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2005] [Revised: 08/29/2005] [Accepted: 08/30/2005] [Indexed: 05/05/2023]
Abstract
Total concentrations of compounds that can cause activation of the aryl hydrocarbon receptor (AhR) in extracts of river sediments from various locations in the Haihe and Dagu Rivers, Tianjin, China were determined by use of the in vitro H4IIE-luc cell line. AhR-active compounds were isolated from sediments by Soxhlet extraction, and the crude extracts were fractionated using a Florisil column into three Fractions. The response of samples was compared to the TCDD standard and expressed as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) equivalents (TCDD-EQs). Significant dioxin-like activity was observed in each sample. The TCDD-EQs in crude extracts of sediments (SCEs), as determined with the bioassay were 2-4 times greater than the sum of the TCDD-EQs of the eluent from fractions separated with a Florisil column. The results also showed that Fractions 2 and 3 contained most of the AhR-mediated activity. The results obtained by using the bioassay were compared with those of previous measurements of the concentrations of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) and the structurally-similar AhR-active polychlorinated biphenyls (PCBs). It was determined that sediments from the Dagu River contained greater concentrations of TCDD-EQ than did sediments from the Haihe River except at Jingangqiao (location R3), which is associated with industrial activities in the adjacent densely populated area. The concentrations of TCDD-EQs, based on the EC20 and the relative potency ranges, of SCEs ranged from 330 to 930 and 1200 to 13,900 pg TCDD-EQ g(-1) dry wt in Haihe and Dagu Rivers, respectively.
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Affiliation(s)
- Maoyong Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
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Suzuki G, Takigami H, Kushi Y, Sakai SI. Time-course changes of mixture effects on AhR binding-dependent luciferase activity in a crude extract from a compost sample. Toxicol Lett 2006; 161:174-87. [PMID: 16225999 DOI: 10.1016/j.toxlet.2005.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2005] [Revised: 09/07/2005] [Accepted: 09/07/2005] [Indexed: 10/25/2022]
Abstract
Crude extracts of environmental samples contain stable and labile aryl hydrocarbon receptor (AhR) ligands, and show huge activities in the cell-based bioassay, and these activities are higher than the chemically calculated induction equivalent values. It is thought that not only unidentified AhR ligands but also mixture effect among compounds might contribute to these activities. In the previous work, we have indicated that hydrophobic compounds in household sewage sludge (HSS) compost may interact synergistically with 2,3,7,8-TCDD in the CALUX (DR-CALUX: Dioxin-Responsive Chemical-Activated Luciferase gene eXpression) assay [Suzuki, G., Takigami, H., Kushi, Y., Sakai, S., 2004. Evaluation of mixture effects in a crude extract of compost using the CALUX bioassay and HPLC fractionation. Environ. Int. 30, 1055-1066]. In this study, we focused on co-existing stable compounds such as halogenated aromatic hydrocarbons (HAHs) and labile compounds such as polyaromatic hydrocarbons (PAHs) in the crude extract and investigated the time-course changes of mixture effects among compounds in environmental samples using the CALUX assay and normal-phase high-performance liquid chromatography (NP-HPLC) fractionation. We confirmed that CYP1A-inducing PAHs and HAHs could be separated by NP-HPLC on a nitrophenylpropylsilica (NITRO) column. To determine whether the activities of AhR ligands in environmental samples (including the HSS compost) could be assessed by the additivity theory, we compared the CALUX activity of the crude extract with the arithmetical sum of the activities of all the fractions separated by NP-HPLC. We confirmed a potentiation of CALUX activity at 12-, 24- and 48-h exposure durations. In contrast, CALUX activity increased additively at 6- and 72-h exposure durations. CALUX activity was potentiated when the CALUX activity of the HPLC fractions showed a remarkable reduction resulting in a change of activity profiles. In contrast, additivity was observed at a 72-h exposure duration when the CALUX activity of the HPLC fractions showed neither remarkable reduction nor a change in profile. Our results suggest that differences in the metabolic decomposition of compounds affected mixture effects on CALUX activity in a crude extract from HSS compost.
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Affiliation(s)
- Go Suzuki
- Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
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