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  1. Article ; Online: Antagonistic effects of a COX1/2 inhibitor drug in human HepG2 cells exposed to an environmental carcinogen.

    Martins, Carla / de Oliveira Galvão, Marcos Felipe / Costa, Pedro M / Dreij, Kristian

    Environmental toxicology and pharmacology

    2024  Volume 108, Page(s) 104453

    Abstract: Understanding interactions between legacy and emerging environmental contaminants has important implications for risk assessment, especially when mutagens and carcinogens are involved, whose critical effects are chronic and therefore difficult to predict. ...

    Abstract Understanding interactions between legacy and emerging environmental contaminants has important implications for risk assessment, especially when mutagens and carcinogens are involved, whose critical effects are chronic and therefore difficult to predict. The current work aimed to investigate potential interactions between benzo[a]pyrene (B[a]P), a carcinogenic polycyclic aromatic hydrocarbon and legacy pollutant, and diclofenac (DFC), a non-steroidal anti-inflammatory drug and pollutant of emerging concern, and how DFC affects B[a]P toxicity. Exposure to binary mixtures of these chemicals resulted in substantially reduced cytotoxicity in human HepG2 cells compared to single-chemical exposures. Significant antagonistic effects were observed in response to high concentrations of B[a]P in combination with DFC at IC
    Language English
    Publishing date 2024-04-18
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1318302-3
    ISSN 1872-7077 ; 1382-6689
    ISSN (online) 1872-7077
    ISSN 1382-6689
    DOI 10.1016/j.etap.2024.104453
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Determination of whole mixture-based potency factors for cancer risk assessment of complex environmental mixtures by in vitro testing of standard reference materials

    de Oliveira Galvão, Marcos Felipe / Sadiktsis, Ioannis / Marques Pedro, Tiago / Dreij, Kristian

    Environment International. 2022 Aug., v. 166 p.107345-

    2022  

    Abstract: Whole mixture-based testing using in vitro new approach methodologies (NAMs) has been suggested to facilitate the hazard and risk assessment of complex environmental mixtures. Previous studies have shown that phosphorylation of DNA damage signaling ... ...

    Abstract Whole mixture-based testing using in vitro new approach methodologies (NAMs) has been suggested to facilitate the hazard and risk assessment of complex environmental mixtures. Previous studies have shown that phosphorylation of DNA damage signaling proteins checkpoint kinase 1 (pChk1) and histone 2AX (γH2AX) are sensitive markers that can be used for estimating carcinogenicity potencies in vitro. Here, and with the aim to better validate the applicability, in vitro-based Mixture Potency Factors (MPFs) of Standard Reference Materials (SRMs) from environmental polycyclic aromatic hydrocarbon (PAH)-containing mixtures were determined and compared to published mutagenicity and tumorigenicity data. Also, genotoxicity was assessed by a flow cytometry-based micronucleus (MN) assay which showed that only benzo[a]pyrene (B[a]P) and coal tar SRM (SRM1597a) caused dose-dependent increases of MN formation, while extracts of diesel particulate matter (SRM1650b), diesel particulate extract (SRM1975), and urban dust (SRM1649b) did not. However, a dose-dependent activation of DNA damage signaling was observed for all PAHs and SRMs. The results demonstrated that all SRMs were more potent than B[a]P, at B[a]P-equivalent concentrations, to induce pChk1 and γH2AX, and that western blot was more sensitive than the In-Cell Western assay in detecting their activation in response to these complex mixtures. Relative MPFs, based on dose–response modelling of pChk1 and γH2AX, ranged 113 – 5270 for the SRMs, indicating several orders of magnitude higher genotoxic potential than B[a]P. Moreover, these MPFs were in good agreement with potency values based on published data from Salmonella mutagenicity and in vivo carcinogenicity studies. In conclusion, these comparisons further validate the feasibility of applying in vitro NAMs, such as whole-mixture based MPFs, in cancer risk assessment of complex mixtures.
    Keywords DNA damage ; Salmonella ; Western blotting ; carcinogenicity ; coal tar ; dose response ; dust ; environment ; genotoxicity ; histones ; mutagenicity ; mutagens ; particulates ; phosphorylation ; polycyclic aromatic hydrocarbons ; risk assessment ; Standard reference material ; Mixture potency factors ; DNA damage signaling ; Cancer risk assessment
    Language English
    Dates of publication 2022-08
    Publishing place Elsevier Ltd
    Document type Article ; Online
    Note Use and reproduction
    ZDB-ID 554791-x
    ISSN 1873-6750 ; 0160-4120
    ISSN (online) 1873-6750
    ISSN 0160-4120
    DOI 10.1016/j.envint.2022.107345
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Determination of whole mixture-based potency factors for cancer risk assessment of complex environmental mixtures by in vitro testing of standard reference materials.

    de Oliveira Galvão, Marcos Felipe / Sadiktsis, Ioannis / Marques Pedro, Tiago / Dreij, Kristian

    Environment international

    2022  Volume 166, Page(s) 107345

    Abstract: Whole mixture-based testing using in vitro new approach methodologies (NAMs) has been suggested to facilitate the hazard and risk assessment of complex environmental mixtures. Previous studies have shown that phosphorylation of DNA damage signaling ... ...

    Abstract Whole mixture-based testing using in vitro new approach methodologies (NAMs) has been suggested to facilitate the hazard and risk assessment of complex environmental mixtures. Previous studies have shown that phosphorylation of DNA damage signaling proteins checkpoint kinase 1 (pChk1) and histone 2AX (γH2AX) are sensitive markers that can be used for estimating carcinogenicity potencies in vitro. Here, and with the aim to better validate the applicability, in vitro-based Mixture Potency Factors (MPFs) of Standard Reference Materials (SRMs) from environmental polycyclic aromatic hydrocarbon (PAH)-containing mixtures were determined and compared to published mutagenicity and tumorigenicity data. Also, genotoxicity was assessed by a flow cytometry-based micronucleus (MN) assay which showed that only benzo[a]pyrene (B[a]P) and coal tar SRM (SRM1597a) caused dose-dependent increases of MN formation, while extracts of diesel particulate matter (SRM1650b), diesel particulate extract (SRM1975), and urban dust (SRM1649b) did not. However, a dose-dependent activation of DNA damage signaling was observed for all PAHs and SRMs. The results demonstrated that all SRMs were more potent than B[a]P, at B[a]P-equivalent concentrations, to induce pChk1 and γH2AX, and that western blot was more sensitive than the In-Cell Western assay in detecting their activation in response to these complex mixtures. Relative MPFs, based on dose-response modelling of pChk1 and γH2AX, ranged 113 - 5270 for the SRMs, indicating several orders of magnitude higher genotoxic potential than B[a]P. Moreover, these MPFs were in good agreement with potency values based on published data from Salmonella mutagenicity and in vivo carcinogenicity studies. In conclusion, these comparisons further validate the feasibility of applying in vitro NAMs, such as whole-mixture based MPFs, in cancer risk assessment of complex mixtures.
    Language English
    Publishing date 2022-06-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 554791-x
    ISSN 1873-6750 ; 0160-4120
    ISSN (online) 1873-6750
    ISSN 0160-4120
    DOI 10.1016/j.envint.2022.107345
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A yearlong monitoring campaign of polycyclic aromatic compounds and other air pollutants at three sites in Sweden: Source identification, in vitro toxicity and human health risk assessment.

    Sadiktsis, Ioannis / de Oliveira Galvão, Marcos Felipe / Mustafa, Musatak / Toublanc, Michaël / Ünlü Endirlik, Burcu / Silvergren, Sanna / Johansson, Christer / Dreij, Kristian

    Chemosphere

    2023  Volume 332, Page(s) 138862

    Abstract: Air pollution is a complex mixture of gases and particulate matter (PM) with local and non-local emission sources, resulting in spatiotemporal variability in concentrations and composition, and thus associated health risks. To study this in the greater ... ...

    Abstract Air pollution is a complex mixture of gases and particulate matter (PM) with local and non-local emission sources, resulting in spatiotemporal variability in concentrations and composition, and thus associated health risks. To study this in the greater Stockholm area, a yearlong monitoring campaign with in situ measurements of PM
    MeSH term(s) Humans ; Air Pollutants/toxicity ; Air Pollutants/analysis ; Polycyclic Compounds/analysis ; Sweden ; Environmental Monitoring/methods ; Air Pollution/analysis ; Particulate Matter/toxicity ; Particulate Matter/analysis ; Vehicle Emissions/toxicity ; Vehicle Emissions/analysis ; Organic Chemicals/analysis ; Seasons ; Risk Assessment
    Chemical Substances Air Pollutants ; Polycyclic Compounds ; Particulate Matter ; Vehicle Emissions ; Organic Chemicals
    Language English
    Publishing date 2023-05-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.138862
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Reactive oxygen species-dependent transient induction of genotoxicity by retene in human liver HepG2 cells.

    Scaramboni, Caroline / Arruda Moura Campos, Maria Lucia / Junqueira Dorta, Daniel / Palma de Oliveira, Danielle / Batistuzzo de Medeiros, Silvia Regina / de Oliveira Galvão, Marcos Felipe / Dreij, Kristian

    Toxicology in vitro : an international journal published in association with BIBRA

    2023  Volume 91, Page(s) 105628

    Abstract: Retene is a polycyclic aromatic hydrocarbon (PAH) emitted mainly by biomass combustion, and despite its ubiquity in atmospheric particulate matter (PM), studies concerning its potential hazard to human health are still incipient. In this study, the ... ...

    Abstract Retene is a polycyclic aromatic hydrocarbon (PAH) emitted mainly by biomass combustion, and despite its ubiquity in atmospheric particulate matter (PM), studies concerning its potential hazard to human health are still incipient. In this study, the cytotoxicity and genotoxicity of retene were investigated in human HepG2 liver cells. Our data showed that retene had minimal effect on cell viability, but induced DNA strand breaks, micronuclei formation, and reactive oxygen species (ROS) formation in a dose- and time-dependent manner. Stronger effects were observed at earlier time points than at longer, indicating transient genotoxicity. Retene activated phosphorylation of Checkpoint kinase 1 (Chk1), an indicator of replication stress and chromosomal instability, which was in accordance with increased formation of micronuclei. A protective effect of the antioxidant N-acetylcysteine (NAC) towards ROS generation and DNA damage signaling was observed, suggesting oxidative stress as a key mechanism of the observed genotoxic effects of retene in HepG2 cells. Altogether our results suggest that retene may contribute to the harmful effects caused by biomass burning PM and represent a potential hazard to human health.
    MeSH term(s) Humans ; Reactive Oxygen Species ; Hep G2 Cells ; Particulate Matter ; DNA Damage ; Oxidative Stress ; Liver
    Chemical Substances retene (0W2D2E1P9Q) ; Reactive Oxygen Species ; Particulate Matter
    Language English
    Publishing date 2023-06-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 639064-x
    ISSN 1879-3177 ; 0887-2333
    ISSN (online) 1879-3177
    ISSN 0887-2333
    DOI 10.1016/j.tiv.2023.105628
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Polycyclic aromatic compounds in particulate matter and indoor dust at preschools in Stockholm, Sweden: Occurrence, sources and genotoxic potential in vitro.

    Lim, Hwanmi / Sadiktsis, Ioannis / de Oliveira Galvão, Marcos Felipe / Westerholm, Roger / Dreij, Kristian

    The Science of the total environment

    2020  Volume 755, Issue Pt 1, Page(s) 142709

    Abstract: Children spend a significant amount of their day in preschool; thus, environmental quality at preschools may have an impact on children's health. In the present study, we analyzed polycyclic aromatic compounds (PACs), including PAHs, alkylated PAHs and ... ...

    Abstract Children spend a significant amount of their day in preschool; thus, environmental quality at preschools may have an impact on children's health. In the present study, we analyzed polycyclic aromatic compounds (PACs), including PAHs, alkylated PAHs and oxygenated PAHs (OPAHs), in indoor and outdoor air particulate matter (PM
    MeSH term(s) Air Pollutants/analysis ; Air Pollutants/toxicity ; Air Pollution, Indoor/analysis ; Child ; Child, Preschool ; DNA Damage ; Dust/analysis ; Environmental Monitoring ; Humans ; Particulate Matter/analysis ; Particulate Matter/toxicity ; Polycyclic Aromatic Hydrocarbons/analysis ; Polycyclic Aromatic Hydrocarbons/toxicity ; Polycyclic Compounds ; Sweden
    Chemical Substances Air Pollutants ; Dust ; Particulate Matter ; Polycyclic Aromatic Hydrocarbons ; Polycyclic Compounds
    Language English
    Publishing date 2020-10-02
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2020.142709
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Genotoxicity and DNA damage signaling in response to complex mixtures of PAHs in biomass burning particulate matter from cashew nut roasting

    de Oliveira Galvão, Marcos Felipe / Sadiktsis, Ioannis / Batistuzzo de Medeiros, Silvia Regina / Dreij, Kristian

    Environmental pollution. 2020 Jan., v. 256

    2020  

    Abstract: Approximately 3 billion people world-wide are exposed to air pollution from biomass burning. Herein, particulate matter (PM) emitted from artisanal cashew nut roasting, an important economic activity worldwide, was investigated. This study focused on: i) ...

    Abstract Approximately 3 billion people world-wide are exposed to air pollution from biomass burning. Herein, particulate matter (PM) emitted from artisanal cashew nut roasting, an important economic activity worldwide, was investigated. This study focused on: i) chemical characterization of polycyclic aromatic hydrocarbons (PAHs) and oxygenated (oxy-) PAHs; ii) intracellular levels of reactive oxygen species (ROS); iii) genotoxic effects and time- and dose-dependent activation of DNA damage signaling, and iv) differential expression of genes involved in xenobiotic metabolism, inflammation, cell cycle arrest and DNA repair, using A549 lung cells. Among the PAHs, chrysene, benzo[a]pyrene (B[a]P), benzo[b]fluoranthene, and benz[a]anthracene showed the highest concentrations (7.8–10 ng/m3), while benzanthrone and 9,10-anthraquinone were the most abundant oxy-PAHs. Testing of PM extracts was based on B[a]P equivalent doses (B[a]Peq). IC50 values for viability were 5.7 and 3.0 nM B[a]Peq at 24 h and 48 h, respectively. At these low doses, we observed a time- and dose-dependent increase in intracellular levels of ROS, genotoxicity (DNA strand breaks) and DNA damage signaling (phosphorylation of the protein checkpoint kinase 1 – Chk1). In comparison, effects of B[a]P alone was observed at micromolar range. To our knowledge, no previous study has demonstrated an activation of pChk1, a biomarker used to estimate the carcinogenic potency of PAHs in vitro, in lung cells exposed to cashew nut roasting extracts. Sustained induction of expression of several important stress response mediators of xenobiotic metabolism (CYP1A1, CYP1B1), ROS and pro-inflammatory response (IL-8, TNF-α, IL-2, COX2), and DNA damage response (CDKN1A and DDB2) was also identified. In conclusion, our data show high potency of cashew nut roasting PM to induce cellular stress including genotoxicity, and more potently when compared to B[a]P alone. Our study provides new data that will help elucidate the toxic effects of low-levels of PAH mixtures from air PM generated by cashew nut roasting.
    Keywords DNA damage ; DNA repair ; air pollution ; anthracenes ; benzo(a)pyrene ; biomarkers ; carcinogenicity ; cashew nuts ; cell cycle checkpoints ; dose response ; gene expression ; gene expression regulation ; genotoxicity ; inflammation ; inhibitory concentration 50 ; interleukin-2 ; interleukin-8 ; lungs ; metabolism ; particulates ; phosphorylation ; protein kinases ; quinones ; reactive oxygen species ; roasting ; stress response ; traditional technology ; tumor necrosis factor-alpha ; viability ; xenobiotics
    Language English
    Dates of publication 2020-01
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2019.113381
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: In vitro cytotoxicity and genotoxicity of single and combined pesticides used by Bolivian farmers.

    Barrón Cuenca, Jessika / de Oliveira Galvão, Marcos Felipe / Ünlü Endirlik, Burcu / Tirado, Noemi / Dreij, Kristian

    Environmental and molecular mutagenesis

    2021  Volume 63, Issue 1, Page(s) 4–17

    Abstract: We previously showed that farmers in Bolivia are exposed to many pesticides, some at elevated levels, and that this was associated with increased risk of genetic damage. To improve the understanding of possible mixture effects, the cytotoxicity and ... ...

    Abstract We previously showed that farmers in Bolivia are exposed to many pesticides, some at elevated levels, and that this was associated with increased risk of genetic damage. To improve the understanding of possible mixture effects, the cytotoxicity and genotoxicity of pesticides were studied in vitro using human liver HepG2 cells. The studied pesticides were 2,4-D, chlorpyrifos, cypermethrin, glyphosate, methamidophos, paraquat, profenofos, and tebuconazole. Three mixtures (U1, U2, and U3) were based on profiles of urinary pesticide metabolites and one mixture on the most frequently used pesticides (S1). The results showed that paraquat and methamidophos were the most cytotoxic pesticides (EC
    MeSH term(s) Bolivia ; Chlorpyrifos/toxicity ; DNA Damage ; Farmers ; Humans ; Paraquat/toxicity ; Pesticides/toxicity
    Chemical Substances Pesticides ; Chlorpyrifos (JCS58I644W) ; Paraquat (PLG39H7695)
    Language English
    Publishing date 2021-12-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 639145-x
    ISSN 1098-2280 ; 0893-6692
    ISSN (online) 1098-2280
    ISSN 0893-6692
    DOI 10.1002/em.22468
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Genotoxicity and DNA damage signaling in response to complex mixtures of PAHs in biomass burning particulate matter from cashew nut roasting.

    de Oliveira Galvão, Marcos Felipe / Sadiktsis, Ioannis / Batistuzzo de Medeiros, Silvia Regina / Dreij, Kristian

    Environmental pollution (Barking, Essex : 1987)

    2019  Volume 256, Page(s) 113381

    Abstract: Approximately 3 billion people world-wide are exposed to air pollution from biomass burning. Herein, particulate matter (PM) emitted from artisanal cashew nut roasting, an important economic activity worldwide, was investigated. This study focused on: i) ...

    Abstract Approximately 3 billion people world-wide are exposed to air pollution from biomass burning. Herein, particulate matter (PM) emitted from artisanal cashew nut roasting, an important economic activity worldwide, was investigated. This study focused on: i) chemical characterization of polycyclic aromatic hydrocarbons (PAHs) and oxygenated (oxy-) PAHs; ii) intracellular levels of reactive oxygen species (ROS); iii) genotoxic effects and time- and dose-dependent activation of DNA damage signaling, and iv) differential expression of genes involved in xenobiotic metabolism, inflammation, cell cycle arrest and DNA repair, using A549 lung cells. Among the PAHs, chrysene, benzo[a]pyrene (B[a]P), benzo[b]fluoranthene, and benz[a]anthracene showed the highest concentrations (7.8-10 ng/m
    MeSH term(s) A549 Cells ; Air Pollutants/analysis ; Air Pollutants/toxicity ; Anacardium/chemistry ; Biomass ; Checkpoint Kinase 1/genetics ; DNA Damage ; Dose-Response Relationship, Drug ; Humans ; Nuts/chemistry ; Particulate Matter/analysis ; Particulate Matter/toxicity ; Polycyclic Aromatic Hydrocarbons/analysis ; Polycyclic Aromatic Hydrocarbons/toxicity ; Signal Transduction ; Time Factors
    Chemical Substances Air Pollutants ; Particulate Matter ; Polycyclic Aromatic Hydrocarbons ; CHEK1 protein, human (EC 2.7.11.1) ; Checkpoint Kinase 1 (EC 2.7.11.1)
    Language English
    Publishing date 2019-10-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2019.113381
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Erratum to "Cell death pathways of particulate matter toxicity" Chemosphere 188C (2017) 32-48.

    Peixoto, Milena Simões / de Oliveira Galvão, Marcos Felipe / Batistuzzo de Medeiros, Silvia Regina

    Chemosphere

    2018  Volume 193, Page(s) 1243

    Language English
    Publishing date 2018
    Publishing country England
    Document type Journal Article ; Published Erratum
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2017.11.071
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