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Moenning JL, Krause T, Lamp J, Maul R, Schenkel H, Fürst P, Pieper R, Numata J. Transfer of polychlorinated dibenzo- p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) from oral exposure into cow's milk - part II: toxicokinetic predictive models for risk assessment. Nutr Res Rev 2023; 36:484-497. [PMID: 36345910 DOI: 10.1017/s0954422422000208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Understanding the transfer of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) as well as polychlorinated biphenyls (PCBs) from oral exposure into cow's milk is not purely an experimental endeavour, as it has produced a large corpus of theoretical work. This work consists of a variety of predictive toxicokinetic models in the realms of health and environmental risk assessment and risk management. Their purpose is to provide mathematical predictive tools to organise and integrate knowledge on the absorption, distribution, metabolism and excretion processes. Toxicokinetic models are based on more than 50 years of transfer studies summarised in part I of this review series. Here in part II, several of these models are described and systematically classified with a focus on their applicability to risk analysis as well as their limitations. This part of the review highlights the opportunities and challenges along the way towards accurate, congener-specific predictive models applicable to changing animal breeds and husbandry conditions.
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Affiliation(s)
- Jan-Louis Moenning
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, Berlin10589, Germany
| | - Torsten Krause
- Department of Safety and Quality of Milk and Fish, Max Rubner-Institut, Hermann-Weigmann-Straße 1, Kiel24103, Germany
| | - Julika Lamp
- Department of Safety and Quality of Milk and Fish, Max Rubner-Institut, Hermann-Weigmann-Straße 1, Kiel24103, Germany
| | - Ronald Maul
- Department of Safety and Quality of Milk and Fish, Max Rubner-Institut, Hermann-Weigmann-Straße 1, Kiel24103, Germany
| | - Hans Schenkel
- Department of Animal Nutrition, University of Hohenheim, Emil-Wolff-Str. 10, Stuttgart70599, Germany
| | - Peter Fürst
- Chemical and Veterinary Analytical Institute Münsterland-Emscher-Lippe (CVUA-MEL), Joseph-König-Straße 40, Münster48147, Germany
| | - Robert Pieper
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, Berlin10589, Germany
| | - Jorge Numata
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, Berlin10589, Germany
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2
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Krause T, Moenning JL, Lamp J, Maul R, Schenkel H, Fürst P, Pieper R, Numata J. Transfer of polychlorinated dibenzo- p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) from oral exposure into cow's milk - Part I: state of knowledge and uncertainties. Nutr Res Rev 2023; 36:448-470. [PMID: 36089770 DOI: 10.1017/s0954422422000178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Polychlorinated dibenzo-para-dioxins (PCDDs) and dibenzofurans (PCDFs) (collectively and colloquially referred to as 'dioxins') as well as polychlorinated biphenyls (PCBs) are persistent and ubiquitous environmental contaminants that may unintentionally enter and accumulate along the food chain. Owing to their chronic toxic effects in humans and bioaccumulative properties, their presence in feed and food requires particular attention. One important exposure pathway for consumers is consumption of milk and dairy products. Their transfer from feed to milk has been studied for the past 50 years to quantify the uptake and elimination kinetics. We extracted transfer parameters (transfer rate, transfer factor, biotransfer factor and elimination half-lives) in a machine-readable format from seventy-six primary and twenty-nine secondary literature items. Kinetic data for some toxicologically relevant dioxin congeners and the elimination half-lives of dioxin-like PCBs are still not available. A well-defined selection of transfer parameters from literature was statistically analysed and shown to display high variability. To understand this variability, we discuss the data with an emphasis on influencing factors, such as experimental conditions, cow performance parameters and metabolic state. While no universal interpretation could be derived, a tendency for increased transfer into milk is apparently connected to an increase in milk yield and milk fat yield as well as during times of body fat mobilisation, for example during the negative energy balance after calving. Over the past decades, milk yield has increased to over 40 kg/d during high lactation, so more research is needed on how this impacts feed to food transfer for PCDD/Fs and PCBs.
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Affiliation(s)
- Torsten Krause
- Department of Safety and Quality of Milk and Fish, Max Rubner-Institut (MRI), Hermann-Weigmann-Straße 1, 24103Kiel, Germany
| | - Jan-Louis Moenning
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Julika Lamp
- Department of Safety and Quality of Milk and Fish, Max Rubner-Institut (MRI), Hermann-Weigmann-Straße 1, 24103Kiel, Germany
| | - Ronald Maul
- Department of Safety and Quality of Milk and Fish, Max Rubner-Institut (MRI), Hermann-Weigmann-Straße 1, 24103Kiel, Germany
| | - Hans Schenkel
- Department of Animal Nutrition, University of Hohenheim, Emil-Wolff-Str. 10, 70599 Stuttgart, Germany
| | - Peter Fürst
- Chemical and Veterinary Analytical Institute Münsterland-Emscher-Lippe (CVUA-MEL), Joseph-König-Straße 40, 48147 Münster, Germany
| | - Robert Pieper
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Jorge Numata
- Department Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
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Mikkonen AT, Martin J, Upton RN, Moenning JL, Numata J, Taylor MP, Roberts MS, Mackenzie L. Dynamic exposure and body burden models for per- and polyfluoroalkyl substances (PFAS) enable management of food safety risks in cattle. Environ Int 2023; 180:108218. [PMID: 37820422 DOI: 10.1016/j.envint.2023.108218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/12/2023] [Accepted: 09/18/2023] [Indexed: 10/13/2023]
Abstract
With increasing global focus on planetary boundaries, food safety and quality, the presence of per- and polyfluoroalkyl substances (PFAS) in the food chain presents a challenge for the sustainable production and supply of quality assured food. Consumption of food is the primary PFAS exposure route for the general population. At contaminated sites, PFAS have been reported in a range of agricultural commodities including cattle. Consumer exposure assessments are complicated by the lack of validated modelling approaches to estimate PFAS bioaccumulation in cattle. Previous studies have shown that PFAS bioaccumulation in livestock is influenced by environmental, spatial and temporal factors that necessitate a dynamic modelling approach. This work presents an integrated exposure and population toxicokinetic (PopTK) model for cattle that estimates serum and tissue concentrations of PFAS over time. Daily exposures were estimated from intakes of water, pasture, and soil, and considered animal growth, seasonal variability (pasture moisture content and temperature) and variable PFAS concentrations across paddocks. Modelled serum and tissue estimates were validated against monitoring data from Australian and Swedish cattle farms. The models were also used to develop and test practical management options for reducing PFAS exposure and to prioritise remediation for farms. Model outputs for exposure management scenarios (testing cattle rotation and targeted supplementation of feed and water) showed potential for marked reductions in consumer exposures from cattle produce.
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Affiliation(s)
- Antti T Mikkonen
- University of South Australia, Clinical and Health Sciences, Adelaide, South Australia, Australia; Environment Protection Authority Victoria, EPA Science, Centre for Applied Sciences, Macleod, Victoria 3085 Australia.
| | - Jennifer Martin
- Environment Protection Authority Victoria, EPA Science, Centre for Applied Sciences, Macleod, Victoria 3085 Australia
| | - Richard N Upton
- University of South Australia, Clinical and Health Sciences, Adelaide, South Australia, Australia
| | - Jan-Louis Moenning
- German Federal Institute for Risk Assessment BfR, Department Safety in the Food Chain, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Jorge Numata
- German Federal Institute for Risk Assessment BfR, Department Safety in the Food Chain, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Mark P Taylor
- Environment Protection Authority Victoria, EPA Science, Centre for Applied Sciences, Macleod, Victoria 3085 Australia
| | - Michael S Roberts
- University of South Australia, Clinical and Health Sciences, Adelaide, South Australia, Australia; University of Queensland, Frazer Institute, Queensland, Australia
| | - Lorraine Mackenzie
- University of South Australia, Clinical and Health Sciences, Adelaide, South Australia, Australia; Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Woodville South, South Australia, Australia
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Moenning JL, Numata J, Bloch D, Jahnke A, Schafft HA, Spolders M, Lüth A, Lahrssen-Wiederholt M, Schulz K. Corrigendum to "Transfer and toxicokinetic modeling of non-dioxin-like polychlorinated biphenyls (ndl-PCBs) into accidentally exposed dairy cattle and their calves - A case report" Environ. Toxicol. Pharmacol. 99 (2023) 104106. Environ Toxicol Pharmacol 2023; 103:104274. [PMID: 37735029 DOI: 10.1016/j.etap.2023.104274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Affiliation(s)
| | - Jorge Numata
- German Federal Institute for Risk Assessment, Berlin, Germany
| | - Dorit Bloch
- German Federal Institute for Risk Assessment, Berlin, Germany
| | - Anne Jahnke
- German Federal Institute for Risk Assessment, Berlin, Germany
| | | | - Markus Spolders
- German Federal Institute for Risk Assessment, Berlin, Germany
| | - Anja Lüth
- German Federal Institute for Risk Assessment, Berlin, Germany
| | | | - Kirsten Schulz
- German Federal Institute for Risk Assessment, Berlin, Germany.
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Krause T, Lamp J, Knappstein K, Walte HG, Moenning JL, Molkentin J, Ober F, Susenbeth A, Westreicher-Kristen E, Schwind KH, Dänicke S, Fürst P, Schenkel H, Pieper R, Numata J. Experimental Study on the Transfer of Polychlorinated Biphenyls (PCBs) and Polychlorinated Dibenzo- p-dioxins and Dibenzofurans (PCDD/Fs) into Milk of High-Yielding Cows during Negative and Positive Energy Balance. J Agric Food Chem 2023; 71:13495-13507. [PMID: 37652440 PMCID: PMC10510706 DOI: 10.1021/acs.jafc.3c02776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 09/02/2023]
Abstract
Dioxin-like polychlorinated biphenyls (dl-PCBs) as well as polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) are a major concern for food safety, especially in fat-containing foods of animal origin, such as milk. Due to the lipophilic character of PCDD/Fs and PCBs, it is of special interest to explore whether the metabolic state of high-yielding cows influences the transfer rates into milk. Five German Holstein cows were orally exposed to a mixture of 17 PCDD/Fs, 12 dl-PCBs, and 6 non-dioxin-like PCBs (ndl-PCBs) for two dosing periods of 28 days each. The first period covered the negative energy balance (NEB) after calving, while the second period addressed the positive energy balance (PEB) in late lactation. Each dosing period was followed by a depuration period of around 100 days. During the NEB phase, the transfer rates of 14 PCDD/Fs and 7 dl-PCBs quantified were significantly (p ≤ 0.1) higher compared to the PEB phase, indicating an influence of the metabolic state on the transfer. Furthermore, the congener-specific transfer rates (0.3-39%) were in the range of the results from former studies. This indicates that the milk yield of the exposed cows is not the only determining factor for the transfer of these congeners into milk.
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Affiliation(s)
- Torsten Krause
- Department
of Safety and Quality of Milk and Fish Products, Max Rubner-Institut (MRI), Hermann-Weigmann-Str. 1, 24103 Kiel, Germany
| | - Julika Lamp
- Department
of Safety and Quality of Milk and Fish Products, Max Rubner-Institut (MRI), Hermann-Weigmann-Str. 1, 24103 Kiel, Germany
| | - Karin Knappstein
- Department
of Safety and Quality of Milk and Fish Products, Max Rubner-Institut (MRI), Hermann-Weigmann-Str. 1, 24103 Kiel, Germany
| | - Hans-Georg Walte
- Department
of Safety and Quality of Milk and Fish Products, Max Rubner-Institut (MRI), Hermann-Weigmann-Str. 1, 24103 Kiel, Germany
| | - Jan-Louis Moenning
- Department
Safety in the Food Chain, German Federal
Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Joachim Molkentin
- Department
of Safety and Quality of Milk and Fish Products, Max Rubner-Institut (MRI), Hermann-Weigmann-Str. 1, 24103 Kiel, Germany
| | - Florian Ober
- Department
of Safety and Quality of Milk and Fish Products, Max Rubner-Institut (MRI), Hermann-Weigmann-Str. 1, 24103 Kiel, Germany
| | - Andreas Susenbeth
- Institute
of Animal Nutrition and Physiology, Kiel
University (CAU), 24118 Kiel, Germany
| | | | - Karl-Heinz Schwind
- Department
of Quality and Safety of Meat, Max Rubner-Institut
(MRI), E.-C.-Baumann-Str. 20, 95326 Kulmbach, Germany
| | - Sven Dänicke
- Institute
of Animal Nutrition, German Federal Research Institute for Animal
Health, Friedrich-Loeffler-Institut (FLI), Bundesallee 37, 38116 Braunschweig, Germany
| | - Peter Fürst
- Institute
of Food Chemistry, University of Münster, Corrensstrasse 45, 48149 Münster, Germany
| | - Hans Schenkel
- Department
of Animal Nutrition, University of Hohenheim, Emil-Wolff-Str. 10, 70599 Stuttgart, Germany
| | - Robert Pieper
- Department
Safety in the Food Chain, German Federal
Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Jorge Numata
- Department
Safety in the Food Chain, German Federal
Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
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6
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Moenning JL, Ohlhoff B, Yamamoto M, Jährmann A, Jahnke A, Lüth A, Pieper R, Numata J. Toxicokinetic modelling of the transfer of non-dioxin like polychlorinated biphenyls from feed into edible tissues of pigs. Sci Total Environ 2023:164539. [PMID: 37268128 DOI: 10.1016/j.scitotenv.2023.164539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/23/2023] [Accepted: 05/27/2023] [Indexed: 06/04/2023]
Abstract
Non-dioxin-like polychlorinated biphenyls (ndl-PCBs) are persistent environmental pollutants that accumulate in the tissues of exposed animals and humans. Contaminated feed can lead to ndl-PCB contaminated foods of animal origin; such foods are the main route of human exposure. Therefore, predicting ndl-PCB transfer from feed into animal products is important for human health risk assessment. Here, we developed a physiologically based toxicokinetic model describing the transfer of PCBs-28, 52, 101, 138, 153 and 180 from contaminated feed into the liver and fat of fattening pigs. The model is based on a feeding study with fattening pigs (PIC hybrids) that were temporarily fed contaminated feed containing known concentrations of ndl-PCBs. The animals were slaughtered at different ages, and ndl-PCB concentrations in muscle fat and liver were determined. The model accounts for animal growth and excretion via the liver. According to their elimination speed and half-lives, they can be categorized into fast (PCB-28), intermediate (PCBs 52 and 101) and slow (PCBs 138, 153 and 180). Using a simulation with realistic growth and feeding patterns, the following transfer rates were found: 10 % (for fast), 35-39 % (intermediate) and 71-77 % (slow eliminated congeners). Using the models, the highest level of 3.8 μg/kg dry matter (DM) was calculated for any sum of ndl-PCBs in pig feed to ensure that the current maximum levels in pig meat and liver (40 ng/g fat) will not be exceeded. The model is included as part of the Supplementary Material.
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Affiliation(s)
- Jan-Louis Moenning
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany
| | - Britta Ohlhoff
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany
| | - Mariko Yamamoto
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany
| | - Anke Jährmann
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany
| | - Anne Jahnke
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany
| | - Anja Lüth
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany
| | - Robert Pieper
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany
| | - Jorge Numata
- German Federal Institute for Risk Assessment (BfR), Department Safety in the Food Chain, Berlin, Germany.
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Moenning JL, Numata J, Bloch D, Jahnke A, Schafft HA, Spolders M, Lüth A, Lahrssen-Wiederholt M, Schulz K. Transfer and toxicokinetic modeling of non-dioxin-like polychlorinated biphenyls (ndl-PCBs) into accidentally exposed dairy cattle and their calves - A case report. Environ Toxicol Pharmacol 2023; 99:104106. [PMID: 36907369 DOI: 10.1016/j.etap.2023.104106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 02/28/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
Polychlorinated biphenyls (PCBs) are persistent environmental pollutants that accumulate in tissues of exposed animals and humans. This case report refers ton=3 dairy cows accidentally exposed to non-dioxin-like PCBs (ndl-PCBs) of unknown origin on a German farm. At study start they had a cumulative total of 122-643 ng/g fat in milk and 105-591 ng/g fat in blood, consisting mainly of PCBs 138, 153, and 180. Two cows calved during the study and their calves were raised on their mothers' milk, resulting in cumulative exposure until slaughter. A physiologically based toxicokinetic model was developed to describe the fate of ndl-PCBs in the animals. The toxicokinetic behavior of ndl-PCBs was simulated in individual animals, including transfer of contaminants into calves via milk and placenta. Both the simulations and experimental data indicate that contamination via both routes is significant. In addition, the model was used to estimate kinetic parameters for risk assessment.
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Affiliation(s)
| | - Jorge Numata
- German Federal Institute for Risk Assessment, Berlin, Germany
| | - Dorit Bloch
- German Federal Institute for Risk Assessment, Berlin, Germany
| | - Anne Jahnke
- German Federal Institute for Risk Assessment, Berlin, Germany
| | | | - Markus Spolders
- German Federal Institute for Risk Assessment, Berlin, Germany
| | - Anja Lüth
- German Federal Institute for Risk Assessment, Berlin, Germany
| | | | - Kirsten Schulz
- German Federal Institute for Risk Assessment, Berlin, Germany.
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Engel AM, Klevenhusen F, Moenning JL, Numata J, Fischer-Tenhagen C, Sachse B, Schäfer B, Fry H, Kappenstein O, Pieper R. Investigations on the Transfer of Quinolizidine Alkaloids from Lupinus angustifolius into the Milk of Dairy Cows. J Agric Food Chem 2022; 70:11749-11758. [PMID: 36068017 PMCID: PMC9501906 DOI: 10.1021/acs.jafc.2c02517] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 08/02/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Lupin varieties with a low content of quinolizidine alkaloids (QAs) like blue sweet lupin (BSL) have long been used as a protein source for dairy cows. A health concern for humans may arise from the transfer of acute toxic QAs from feed into cow's milk. This study is the first to quantify the transfer of QAs from BSL into cow's milk with experimental and modeling methods. Four lactating dairy cows were subjected to two 7 day feeding periods with 1 and 2 kg/d BSL, respectively, each followed by a depuration period. BSL contained 1774 mg/kg dry matter total QAs. Individual milk samples were taken twice daily and QA contents in feed and milk determined with liquid chromatography-tandem mass spectrometry. Transfer of QAs into the milk was already seen with the administration of 1 kg/d BSL, with differences in transfer rates (TRs) between individual QAs. A toxicokinetic model was derived to quantify and predict QA feed-to-food transfer. For the four most prominent QAs, our model shows an α-half-life of around 0.27 d. TRs were obtained for six QAs and were between 0.13 (sparteine) and 3.74% (multiflorine). A toxicological assessment of milk containing QAs as measured in this study indicated a potential health concern.
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Affiliation(s)
- Anna Maria Engel
- German
Federal Institute for Risk Assessment, Department Safety in the Food
Chain, Max-Dohrn-Strasse
8-10, Berlin 10589, Germany
| | - Fenja Klevenhusen
- German
Federal Institute for Risk Assessment, Department Safety in the Food
Chain, Max-Dohrn-Strasse
8-10, Berlin 10589, Germany
| | - Jan-Louis Moenning
- German
Federal Institute for Risk Assessment, Department Safety in the Food
Chain, Max-Dohrn-Strasse
8-10, Berlin 10589, Germany
| | - Jorge Numata
- German
Federal Institute for Risk Assessment, Department Safety in the Food
Chain, Max-Dohrn-Strasse
8-10, Berlin 10589, Germany
| | - Carola Fischer-Tenhagen
- German
Federal Institute for Risk Assessment, Department Experimental Toxicology
and ZEBET, Alt-Marienfelde
17-21, Berlin 12277, Germany
| | - Benjamin Sachse
- German
Federal Institute for Risk Assessment, Department Food Safety, Max-Dohrn-Strasse 8-10, Berlin 10589, Germany
| | - Bernd Schäfer
- German
Federal Institute for Risk Assessment, Department Food Safety, Max-Dohrn-Strasse 8-10, Berlin 10589, Germany
| | - Hildburg Fry
- German
Federal Institute for Risk Assessment, Department Safety in the Food
Chain, Max-Dohrn-Strasse
8-10, Berlin 10589, Germany
| | - Oliver Kappenstein
- German
Federal Institute for Risk Assessment, Department Safety in the Food
Chain, Max-Dohrn-Strasse
8-10, Berlin 10589, Germany
| | - Robert Pieper
- German
Federal Institute for Risk Assessment, Department Safety in the Food
Chain, Max-Dohrn-Strasse
8-10, Berlin 10589, Germany
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