DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyrene
To reduce the need for animal tests, in vitro assays are often used as alternative methods. To derive toxic doses for higher tier organisms from in vitro assay results, quantitative in vitro-in vivo extrapolation (qIVIVE) based on physiological-based toxicokinetic (PBTK) models is typically the pref...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Current Research in Toxicology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666027X22000342 |
| _version_ | 1827920107919114240 |
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| author | Martin Gerhards Alexander Böhme Kristin Schubert Bernhard Kodritsch Nadin Ulrich |
| author_facet | Martin Gerhards Alexander Böhme Kristin Schubert Bernhard Kodritsch Nadin Ulrich |
| author_sort | Martin Gerhards |
| collection | DOAJ |
| description | To reduce the need for animal tests, in vitro assays are often used as alternative methods. To derive toxic doses for higher tier organisms from in vitro assay results, quantitative in vitro-in vivo extrapolation (qIVIVE) based on physiological-based toxicokinetic (PBTK) models is typically the preferred approach. Such PBTK models require many input parameters to address the route from dose to target site concentration. However, respective data is very often not available. Hence, our aim is to call attention to an alternative way to build a link between animal (in vivo) and cell-derived (in vitro) toxicity data. To this end, we selected the carcinogenic chemical benzo[a]pyrene (BaP) for our study. Our approach relates both in vitro assay and in vivo data to a main intermediate marker structure for carcinogenicity on the subcellular level – the BaP-DNA adduct BaP-7,8-dihydrodiol-9,10-epoxide-deoxyguanosine. Thus, BaP dose is directly linked to a measure of the toxicity-initiating event. We used Syrian hamster embryo (SHE) and Balb/c 3T3 cell transformation assay as in vitro data and compared these data to outcomes of in vivo carcinogenicity tests in rodents. In vitro and in vivo DNA adduct levels range within three orders of magnitude. Especially metabolic saturation at higher doses and interspecies variabilities are identified and critically discussed as possible sources of errors in our simplified approach. Finally, our study points out possible routes to overcome limitations of the envisaged approach in order to allow for a reliable qIVIVE in the future. |
| first_indexed | 2024-03-13T04:07:52Z |
| format | Article |
| id | doaj.art-eb11fed079584845aa7529592609a7d5 |
| institution | Directory Open Access Journal |
| issn | 2666-027X |
| language | English |
| last_indexed | 2024-03-13T04:07:52Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Current Research in Toxicology |
| spelling | doaj.art-eb11fed079584845aa7529592609a7d52023-06-21T06:59:57ZengElsevierCurrent Research in Toxicology2666-027X2023-01-014100097DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyreneMartin Gerhards0Alexander Böhme1Kristin Schubert2Bernhard Kodritsch3Nadin Ulrich4Department of Ecological Chemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, 04318 Leipzig, GermanyDepartment of Ecological Chemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, 04318 Leipzig, GermanyDepartment of Molecular Systems Biology, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, 04318 Leipzig, GermanyDepartment of Bioanalytical Ecotoxicology, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, 04318 Leipzig, GermanyDepartment of Ecological Chemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstr. 15, 04318 Leipzig, Germany; Corresponding author.To reduce the need for animal tests, in vitro assays are often used as alternative methods. To derive toxic doses for higher tier organisms from in vitro assay results, quantitative in vitro-in vivo extrapolation (qIVIVE) based on physiological-based toxicokinetic (PBTK) models is typically the preferred approach. Such PBTK models require many input parameters to address the route from dose to target site concentration. However, respective data is very often not available. Hence, our aim is to call attention to an alternative way to build a link between animal (in vivo) and cell-derived (in vitro) toxicity data. To this end, we selected the carcinogenic chemical benzo[a]pyrene (BaP) for our study. Our approach relates both in vitro assay and in vivo data to a main intermediate marker structure for carcinogenicity on the subcellular level – the BaP-DNA adduct BaP-7,8-dihydrodiol-9,10-epoxide-deoxyguanosine. Thus, BaP dose is directly linked to a measure of the toxicity-initiating event. We used Syrian hamster embryo (SHE) and Balb/c 3T3 cell transformation assay as in vitro data and compared these data to outcomes of in vivo carcinogenicity tests in rodents. In vitro and in vivo DNA adduct levels range within three orders of magnitude. Especially metabolic saturation at higher doses and interspecies variabilities are identified and critically discussed as possible sources of errors in our simplified approach. Finally, our study points out possible routes to overcome limitations of the envisaged approach in order to allow for a reliable qIVIVE in the future.http://www.sciencedirect.com/science/article/pii/S2666027X22000342In vitro-in vivo extrapolation IVIVEBenzo[a]pyreneDNA adduct formation |
| spellingShingle | Martin Gerhards Alexander Böhme Kristin Schubert Bernhard Kodritsch Nadin Ulrich DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyrene Current Research in Toxicology In vitro-in vivo extrapolation IVIVE Benzo[a]pyrene DNA adduct formation |
| title | DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyrene |
| title_full | DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyrene |
| title_fullStr | DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyrene |
| title_full_unstemmed | DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyrene |
| title_short | DNA adducts as link between in vitro and in vivo carcinogenicity – A case study with benzo[a]pyrene |
| title_sort | dna adducts as link between in vitro and in vivo carcinogenicity a case study with benzo a pyrene |
| topic | In vitro-in vivo extrapolation IVIVE Benzo[a]pyrene DNA adduct formation |
| url | http://www.sciencedirect.com/science/article/pii/S2666027X22000342 |
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