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Carne G, Leconte S, Sirot V, Breysse N, Badot PM, Bispo A, Deportes IZ, Dumat C, Rivière G, Crépet A. Mass balance approach to assess the impact of cadmium decrease in mineral phosphate fertilizers on health risk: The case-study of French agricultural soils. Sci Total Environ 2021; 760:143374. [PMID: 33213914 DOI: 10.1016/j.scitotenv.2020.143374] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 07/28/2020] [Revised: 10/23/2020] [Accepted: 10/24/2020] [Indexed: 06/11/2023]
Abstract
Cadmium is a ubiquitous and highly toxic contaminant that can cause serious adverse effects. The European Food Safety Authority (EFSA) and the French Agency for Food, Environmental and Occupational Health & Safety (ANSES) have shown that the risk related to food contamination by cadmium cannot be ruled out in Europe and France. Fertilizing material is one of the main sources of cadmium contamination in the food chain on which regulators can play to reduce cadmium exposure in the population. The aim of this work was to develop a mass-balance approach integrating the various environmental sources of cadmium to estimate the effects of a decrease in cadmium concentrations in crop fertilizers on dietary exposure and on the health risk. This approach led to a predictive model that can be used as a decision-making tool. Representative and protective fertilization scenarios associated with controlled cadmium levels in mineral phosphate fertilizers were simulated and converted into cadmium fluxes. Cadmium inputs from industrial mineral phosphate fertilizers were then compared with cadmium brought by the application of manure, sewage sludge and farm anaerobic digest, at the levels typical of French agricultural practices. Regardless of the fertilizer and scenario used, a flux lower than 2 g Cd.ha-1.year-1 reduces both the accumulation in soils and the transfer of cadmium in the food chain. It corresponds to a cadmium content of 20 mg.kg P2O5-1 or less in mineral phosphate fertilizers. Modelling the transfer of cadmium from the soil to consumed food made it possible to propose cadmium limits in fertilizers applied in France. In a global context of ecological transition to promote human health, this research will help risk managers and public authorities in the regulatory decision-making process for the reduction of environmental cadmium contamination and human exposure.
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Affiliation(s)
- G Carne
- ANSES, Risk Assessment Department, 14 rue Pierre et Marie Curie, F-94701 Maisons-Alfort Cedex, France.
| | - S Leconte
- ANSES, Risk Assessment Department, 14 rue Pierre et Marie Curie, F-94701 Maisons-Alfort Cedex, France
| | - V Sirot
- ANSES, Risk Assessment Department, 14 rue Pierre et Marie Curie, F-94701 Maisons-Alfort Cedex, France
| | - N Breysse
- ANSES, Regulated Products Assessment Department, 14 rue Pierre et Marie Curie, F-94701, Maisons-Alfort Cedex, France
| | - P-M Badot
- UMR 6249, Chrono-Environment, University of Franche-Comté/CNRS, 16, route de Gray, 25000 Besançon, France
| | - A Bispo
- INRAE, Orléans US1106 INFOSOL, 2163 avenue de la Pomme de Pin, CS 40001 Ardon, 45075 Orleans cedex 2, France
| | - I Z Deportes
- ADEME - Service Mobilisation et valorisation des Déchets, 20 avenue du Grésillé, 49004 Angers cedex 01, France
| | - C Dumat
- CERTOP, CNRS, UT2J, UPS, 5 Allée Antonio Machado, 31000 Toulouse, France
| | - G Rivière
- ANSES, Risk Assessment Department, 14 rue Pierre et Marie Curie, F-94701 Maisons-Alfort Cedex, France
| | - A Crépet
- ANSES, Risk Assessment Department, 14 rue Pierre et Marie Curie, F-94701 Maisons-Alfort Cedex, France
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Domengé O, Ragot H, Deloux R, Crépet A, Revet G, Boitard SE, Simon A, Mougenot N, David L, Delair T, Montembault A, Agbulut O. Efficacy of epicardial implantation of acellular chitosan hydrogels in ischemic and nonischemic heart failure: impact of the acetylation degree of chitosan. Acta Biomater 2021; 119:125-139. [PMID: 33161185 DOI: 10.1016/j.actbio.2020.10.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/20/2020] [Accepted: 10/27/2020] [Indexed: 12/31/2022]
Abstract
This work explores the epicardial implantation of acellular chitosan hydrogels in two murine models of cardiomyopathy, focusing on their potential to restore the functional capacity of the heart. Different chitosan hydrogels were generated using polymers of four degrees of acetylation, ranging from 2.5% to 38%, because the degree of acetylation affects their degradation and biological activity. The hydrogels were adjusted to a 3% final polymer concentration. After complete macromolecular characterization of the chitosans and study of the mechanical properties of the resulting hydrogels, they were sutured onto the surface of the myocardium, first in rat after four-weeks of coronary ligation (n=58) then in mice with cardiomyopathy induced by a cardiac-specific invalidation of serum response factor (n=20). The implantation of the hydrogels was associated with a reversion of cardiac function loss with maximal effects for the acetylation degree of 24%. The extent of fibrosis, the cardiomyocyte length-to-width ratio, as well as the genes involved in fibrosis and stress were repressed after implantation. Our study demonstrated the beneficial effects of chitosan hydrogels, particularly with polymers of high degrees of acetylation, on cardiac remodeling in two cardiomyopathy models. Our findings indicate they have great potential as a reliable therapeutic approach to heart failure.
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Lucas A, Tauleigne A, Da Cruz-Boisson F, Crépet A, Bergeron-Vanhille A, Martin G, Garois N, Cassagnau P, Bounor-Legaré V. Mechanical Properties Enhancement while Decreasing the Viscosity of Copolyether–Ester from In Situ Formation of Star-Based Structures by Reactive Extrusion. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Antoine Lucas
- Univ Lyon, Université Lyon1, CNRS UMR 5223, Ingénierie des Matériaux Polymères, Lyon F-69621, France
| | - Adrien Tauleigne
- Univ Lyon, Université Lyon1, CNRS UMR 5223, Ingénierie des Matériaux Polymères, Lyon F-69621, France
| | - Fernande Da Cruz-Boisson
- Univ Lyon, INSA de Lyon, CNRS UMR 5223, Ingénierie des Matériaux Polymères, Lyon F-69621, France
| | - Agnès Crépet
- Univ Lyon, Université Lyon1, CNRS UMR 5223, Ingénierie des Matériaux Polymères, Lyon F-69621, France
| | | | - Grégory Martin
- Hutchinson, Centre de Recherche, Rue Gustave Nourry B.P. 31, Chalette-sur-Loing 45120, France
| | - Nicolas Garois
- Hutchinson, Centre de Recherche, Rue Gustave Nourry B.P. 31, Chalette-sur-Loing 45120, France
| | - Philippe Cassagnau
- Univ Lyon, Université Lyon1, CNRS UMR 5223, Ingénierie des Matériaux Polymères, Lyon F-69621, France
| | - Véronique Bounor-Legaré
- Univ Lyon, Université Lyon1, CNRS UMR 5223, Ingénierie des Matériaux Polymères, Lyon F-69621, France
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Delas T, Mock-Joubert M, Faivre J, Hofmaier M, Sandre O, Dole F, Chapel JP, Crépet A, Trombotto S, Delair T, Schatz C. Effects of Chain Length of Chitosan Oligosaccharides on Solution Properties and Complexation with siRNA. Polymers (Basel) 2019; 11:E1236. [PMID: 31349712 PMCID: PMC6723797 DOI: 10.3390/polym11081236] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 07/04/2019] [Accepted: 07/04/2019] [Indexed: 12/13/2022] Open
Abstract
In the context of gene delivery, chitosan has been widely used as a safe and effective polycation to complex DNA, RNA and more recently, siRNA. However, much less attention has been paid to chitosan oligosaccharides (COS) despite their biological properties. This study proposed to carry out a physicochemical study of COS varying in degree of polymerization (DP) from 5 to 50, both from the point of view of the solution properties and the complexing behavior with siRNA. The main parameters studied as a function of DP were the apparent pKa, the solubility versus pH, the binding affinity with siRNA and the colloidal properties of complexes. Some parameters, like the pKa or the binding enthalpy with siRNA, showed a marked transition from DP 5 to DP 13, suggesting that electrostatic properties of COS vary considerably in this range of DP. The colloidal properties of siRNA/COS complexes were affected in a different way by the COS chain length. In particular, COS of relatively high DP (≥50) were required to form small complex particles with good stability.
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Affiliation(s)
- Tim Delas
- Laboratoire de Chimie des Polymères Organiques (LCPO), Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5629, 33600 Pessac, France
| | - Maxime Mock-Joubert
- Ingénierie des Matériaux Polymères (IMP), CNRS UMR 5223, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France
| | - Jimmy Faivre
- Ingénierie des Matériaux Polymères (IMP), CNRS UMR 5223, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France
| | - Mirjam Hofmaier
- Laboratoire de Chimie des Polymères Organiques (LCPO), Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5629, 33600 Pessac, France
| | - Olivier Sandre
- Laboratoire de Chimie des Polymères Organiques (LCPO), Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5629, 33600 Pessac, France
| | - François Dole
- Centre de Recherche Paul Pascal (CRPP), UMR CNRS 5031, Univ. Bordeaux, 33600 Pessac, France
| | - Jean Paul Chapel
- Centre de Recherche Paul Pascal (CRPP), UMR CNRS 5031, Univ. Bordeaux, 33600 Pessac, France
| | - Agnès Crépet
- Ingénierie des Matériaux Polymères (IMP), CNRS UMR 5223, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France
| | - Stéphane Trombotto
- Ingénierie des Matériaux Polymères (IMP), CNRS UMR 5223, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France
| | - Thierry Delair
- Ingénierie des Matériaux Polymères (IMP), CNRS UMR 5223, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France
| | - Christophe Schatz
- Laboratoire de Chimie des Polymères Organiques (LCPO), Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5629, 33600 Pessac, France.
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Traoré T, Forhan A, Sirot V, Kadawathagedara M, Heude B, Hulin M, de Lauzon-Guillain B, Botton J, Charles M, Crépet A. To which mixtures are French pregnant women mainly exposed? A combination of the second French total diet study with the EDEN and ELFE cohort studies. Food Chem Toxicol 2018; 111:310-328. [DOI: 10.1016/j.fct.2017.11.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 11/02/2017] [Accepted: 11/11/2017] [Indexed: 11/15/2022]
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Lalevée G, David L, Montembault A, Blanchard K, Meadows J, Malaise S, Crépet A, Grillo I, Morfin I, Delair T, Sudre G. Highly stretchable hydrogels from complex coacervation of natural polyelectrolytes. Soft Matter 2017; 13:6594-6605. [PMID: 28905969 DOI: 10.1039/c7sm01215b] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The controlled complex coacervation of oppositely charged hyaluronic acid (Mw ≈ 800-1000 kg mol-1) and chitosan (Mw ≈ 160 kg mol-1, degree of acetylation = 15%) led to hydrogels with controllable properties in terms of elasticity and strength. In this work, we performed desalting by dialysis of high ionic strength solutions of mixed polyelectrolytes and showed that the control of the pH during the polyelectrolyte assembly greatly impacts the mechanical properties of the hydrogel. First, for pHs from 5.5 to 7.5, a slight coacervation was observed due to low chitosan protonation and poor polyelectrolyte associations. Then, for pHs from 3.0 to 5.5, coacervation and syneresis led to free-standing and easy to handle hydrogels. Finally, for pHs from 2.0 to 3.0 (close to the pKa of the hyaluronic acid), we observed the unusual stretchability of these hydrogels that could arise from the pre-folding of hyaluronic acid chains while physical crosslinking was achieved by hyaluronic acid/chitosan polyelectrolyte complexation.
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Affiliation(s)
- Gautier Lalevée
- Ingénierie des Matériaux Polymères (IMP), Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5223, 15 Boulevard Latarjet, Villeurbanne, F-69622, France.
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7
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Traoré T, Béchaux C, Sirot V, Crépet A. To which chemical mixtures is the French population exposed? Mixture identification from the second French Total Diet Study. Food Chem Toxicol 2016; 98:179-188. [DOI: 10.1016/j.fct.2016.10.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 10/26/2016] [Accepted: 10/27/2016] [Indexed: 11/24/2022]
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8
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Lalevée G, Sudre G, Montembault A, Meadows J, Malaise S, Crépet A, David L, Delair T. Polyelectrolyte complexes via desalting mixtures of hyaluronic acid and chitosan—Physicochemical study and structural analysis. Carbohydr Polym 2016; 154:86-95. [DOI: 10.1016/j.carbpol.2016.08.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 07/20/2016] [Accepted: 08/03/2016] [Indexed: 12/22/2022]
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9
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Gazan R, Béchaux C, Crépet A, Sirot V, Drouillet-Pinard P, Dubuisson C, Havard S. Dietary patterns in the French adult population: a study from the second French national cross-sectional dietary survey (INCA2) (2006-2007). Br J Nutr 2016; 116:300-15. [PMID: 27189191 PMCID: PMC4910537 DOI: 10.1017/s0007114516001549] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 02/20/2016] [Accepted: 03/21/2016] [Indexed: 11/17/2022]
Abstract
Identification and characterisation of dietary patterns are needed to define public health policies to promote better food behaviours. The aim of this study was to identify the major dietary patterns in the French adult population and to determine their main demographic, socio-economic, nutritional and environmental characteristics. Dietary patterns were defined from food consumption data collected in the second French national cross-sectional dietary survey (2006-2007). Non-negative-matrix factorisation method, followed by a cluster analysis, was implemented to derive the dietary patterns. Logistic regressions were then used to determine their main demographic and socio-economic characteristics. Finally, nutritional profiles and contaminant exposure levels of dietary patterns were compared using ANOVA. Seven dietary patterns, with specific food consumption behaviours, were identified: 'Small eater', 'Health conscious', 'Mediterranean', 'Sweet and processed', 'Traditional', 'Snacker' and 'Basic consumer'. For instance, the Health-conscious pattern was characterised by a high consumption of low-fat and light products. Individuals belonging to this pattern were likely to be older and to have a better nutritional profile than the overall population, but were more exposed to many contaminants. Conversely, individuals of Snacker pattern were likely to be younger, consumed more highly processed foods, had a nutrient-poor profile but were exposed to a limited number of food contaminants. The study identified main dietary patterns in the French adult population with distinct food behaviours and specific demographic, socio-economic, nutritional and environmental features. Paradoxically, for better dietary patterns, potential health risks cannot be ruled out. Therefore, this study demonstrated the need to conduct a risk-benefit analysis to define efficient public health policies regarding diet.
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Affiliation(s)
- R Gazan
- Risk Assessment Department,French Agency for Food, Environmental and Occupational Health & Safety (ANSES),94701 Maisons-Alfort,France
| | - C Béchaux
- Risk Assessment Department,French Agency for Food, Environmental and Occupational Health & Safety (ANSES),94701 Maisons-Alfort,France
| | - A Crépet
- Risk Assessment Department,French Agency for Food, Environmental and Occupational Health & Safety (ANSES),94701 Maisons-Alfort,France
| | - V Sirot
- Risk Assessment Department,French Agency for Food, Environmental and Occupational Health & Safety (ANSES),94701 Maisons-Alfort,France
| | - P Drouillet-Pinard
- Risk Assessment Department,French Agency for Food, Environmental and Occupational Health & Safety (ANSES),94701 Maisons-Alfort,France
| | - C Dubuisson
- Risk Assessment Department,French Agency for Food, Environmental and Occupational Health & Safety (ANSES),94701 Maisons-Alfort,France
| | - S Havard
- Risk Assessment Department,French Agency for Food, Environmental and Occupational Health & Safety (ANSES),94701 Maisons-Alfort,France
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Crépet A, Maai S, Sirot V, Béchaux C, Bodin L. Do toxicokinetic interactions for mixture improve aggregate exposure assessment? The case study of a metal mixture. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.1003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Béchaux C, Amzal B, Crépet A, Dorne JL. Meta-analysis to better integrate human variability in toxicokinetic: CYP2D6-related uncertainty factors. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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Maret B, Crépet A, Faye C, Garrelly L, Ladavière C. Molar-Mass Analysis of Dendrigraft Poly(l-lysine) (DGL) Polyelectrolytes by SEC-MALLS: The “Cornerstone” Refractive Index Increment. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400400] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Barbara Maret
- COLCOM, Nanotech for biomedical applications, Cap-Alpha; Avenue de l'Europe 34830 Clapiers France
- Institute of Biomolecules Max Mousseron; UMR 5247 CNRS Université Montpellier 1 & Montpellier 2; CC 17006 Place Eugène Bataillon 34095 Montpellier France
| | - Agnès Crépet
- UMR CNRS 5223, IMP@Lyon 1; Université de Lyon Polytech Lyon; 15 bd Latarjet 69622 Villeurbanne France
| | - Clément Faye
- COLCOM, Nanotech for biomedical applications, Cap-Alpha; Avenue de l'Europe 34830 Clapiers France
| | - Laurent Garrelly
- COLCOM, Nanotech for biomedical applications, Cap-Alpha; Avenue de l'Europe 34830 Clapiers France
| | - Catherine Ladavière
- UMR CNRS 5223, IMP@Lyon 1; Université de Lyon Polytech Lyon; 15 bd Latarjet 69622 Villeurbanne France
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Crépet A, Héraud F, Béchaux C, Gouze M, Pierlot S, Fastier A, Leblanc J, Le Hégarat L, Takakura N, Fessard V, Tressou J, Maximilien R, de Sousa G, Nawaz A, Zucchini-Pascal N, Rahmani R, Audebert M, Graillot V, Cravedi J. The PERICLES research program: An integrated approach to characterize the combined effects of mixtures of pesticide residues to which the French population is exposed. Toxicology 2013; 313:83-93. [DOI: 10.1016/j.tox.2013.04.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 09/28/2012] [Accepted: 04/08/2013] [Indexed: 10/27/2022]
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14
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Crépet A, Tressou J, Graillot V, Béchaux C, Pierlot S, Héraud F, Leblanc JC. Identification of the main pesticide residue mixtures to which the French population is exposed. Environ Res 2013; 126:125-133. [PMID: 23777638 DOI: 10.1016/j.envres.2013.03.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [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: 11/30/2011] [Revised: 03/25/2013] [Accepted: 03/27/2013] [Indexed: 06/02/2023]
Abstract
Owing to the intensive use of pesticides and their potential persistence in the environment, various pesticide residues can be found in the diet. Consumers are therefore exposed to complex pesticide mixtures which may have combined adverse effects on human health. By modelling food exposure to multiple pesticides, this paper aims to determine the main mixtures to which the general population is exposed in France. Dietary exposure of 3337 individuals from the INCA2 French national consumption survey was assessed for 79 pesticide residues, based on results of the 2006 French food monitoring programmes. Individuals were divided into groups with similar patterns of co-exposure using the clustering ability of a Bayesian nonparametric model. In the 5 groups of individuals with the highest exposure, mixtures are formed by pairs of pesticides with correlations above 0.7. Seven mixtures of 2-6 pesticides each were characterised. We identified the commodities that contributed the most to exposure. Pesticide mixtures can either be components of a single plant protection product applied together on the same crop or be from separate products that are consumed together during a meal. Of the 25 pesticides forming the mixtures, two--DDT and Dieldrin--are known persistent organic pollutants. The approach developed is generic and can be applied to all types of substances found in the diet in order to characterise the mixtures that should be studied first because of their adverse effects on health.
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Affiliation(s)
- A Crépet
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, 27-31 Avenue du général Leclerc, 94701 Maisons-Alfort, France.
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Crépet A, Elegbede CF, Marette S, Moneret-vautrin DA, Papadopoulos A, Roosen J. First results of MIRABEL: a research program to develop tools for risk and cost/benefit analysis of peanut allergy. Clin Transl Allergy 2013. [PMCID: PMC3723671 DOI: 10.1186/2045-7022-3-s3-p135] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- A Crépet
- DER, ANSES, Maisons-Alfort, France
| | | | - S Marette
- Public Economy, INRA, Thiverval-Grignon, France
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Elegbede CF, Papadopoulos A, Crépet A. Sample size optimisation when designing sampling plan for risk assessment relating to adventitious presence of allergens in food. Clin Transl Allergy 2013. [PMCID: PMC3723737 DOI: 10.1186/2045-7022-3-s3-p137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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17
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Crépet A, Tressou J, Verger P, Leblanc JC. Management options to reduce exposure to methyl mercury through the consumption of fish and fishery products by the French population. Regul Toxicol Pharmacol 2005; 42:179-89. [PMID: 15882918 DOI: 10.1016/j.yrtph.2005.03.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2004] [Indexed: 11/30/2022]
Abstract
This paper presents an updated assessment of exposure in France to methyl mercury through the consumption of fish and fishery products, and proposes several management scenarios which could reduce this exposure through changes to fish contamination levels or fish consumption patterns. The exposure model was applied in line with previous methodological results [Tressou, J., Crépet, A., Bertail, P., Feinberg, M.H., Leblanc J.Ch., 2004a. Probabilistic exposure assessment to food chemicals based on extreme value theory: application to heavy metals from fish and sea products. Food Chem. Toxicol. 42, 1349-1358; Tressou, J., Leblanc, J.Ch., Feinberg, M., Bertail, P., 2004b. Statistical methodology to evaluate food exposure to a contaminant and influence of sanitary limits: application to ochratoxin A. Regul. Toxicol. Pharmacol. 40, 252-263] so as to obtain a realistic estimate of probability and confidence intervals (95% CI) concerning French consumers exposed to levels exceeding the revised fixed provisional tolerable weekly intake (PTWI) for methyl mercury of 1.6 microg/week/kg of body weight, established by the Joint FAO/WHO Expert Committee on Food Additives in 2003. The results showed that young children aged between 3 and 6 years old or 7 and 10 years old, and women of childbearing age were at the risk groups. With respect to these groups and according to the fish consumers patterns (consumers of predatory fish only or consumers of predatory and nonpredatory fish), the results suggested that strategies to diminish MeHg exposure by reducing the amount of predatory fish consumed would be more efficient in significantly decreasing the probability of exceeding the PTWI than the implementation of international standards.
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Affiliation(s)
- A Crépet
- INRA Mét@risk, Food risk analysis methodologies, 16 rue Claude Bernard, 75231 Paris, Cedex 5, France.
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David L, Montembault A, Vizio N, Crépet A, Viton C, Domard A, Morfin I, Rochas C. Ordering in Bio-Polyelectrolyte Chitosan Solutions. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/masy.200550437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Tressou J, Crépet A, Bertail P, Feinberg MH, Leblanc JC. Probabilistic exposure assessment to food chemicals based on extreme value theory. Application to heavy metals from fish and sea products. Food Chem Toxicol 2004; 42:1349-58. [PMID: 15207386 DOI: 10.1016/j.fct.2004.03.016] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2003] [Accepted: 03/27/2004] [Indexed: 11/29/2022]
Abstract
This paper presents new statistical methods in the field of exposure assessment. We focus on the estimation of the probability for the exposure to exceed a fixed safe level such as the provisional tolerable weekly intake (PTWI), when both consumption data and contamination data are independently available. Various calculations of exposure are proposed and compared. For many contaminants, PTWI belongs to the exposure tail distribution, which suggests the use of extreme value theory (EVT) to evaluate the risk. Our approach consists in modelling the exposure tail by a Pareto type distribution characterized by a Pareto index which may be seen as a measure of the risk of exceeding the PTWI. Using propositions by EVT specialists, we correct the bias of the usual Hill estimator to accurately estimate this risk index. We compare the results with an empirical plug-in method and show that the Pareto adjustment is relevant and efficient when exposure is low compared to the PTWI while the plug-in method should be used when exposure is higher. To illustrate our approach, we present some exposure assessment for heavy metals (lead, cadmium, mercury) via sea product consumption.
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Affiliation(s)
- J Tressou
- INRA-Mét@Risk, Méthodologies d'analyse de risque alimentaire, INA-PG, 16 rue Claude Bernard, 75231 Paris Cedex 5, France.
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