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Cirovic A, Cirovic A, Yimthiang S, Vesey DA, Satarug S. Modulation of Adverse Health Effects of Environmental Cadmium Exposure by Zinc and Its Transporters. Biomolecules 2024; 14:650. [PMID: 38927054 PMCID: PMC11202194 DOI: 10.3390/biom14060650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 05/22/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
Zinc (Zn) is the second most abundant metal in the human body and is essential for the function of 10% of all proteins. As metals cannot be synthesized or degraded, they must be assimilated from the diet by specialized transport proteins, which unfortunately also provide an entry route for the toxic metal pollutant cadmium (Cd). The intestinal absorption of Zn depends on the composition of food that is consumed, firstly the amount of Zn itself and then the quantity of other food constituents such as phytate, protein, and calcium (Ca). In cells, Zn is involved in the regulation of intermediary metabolism, gene expression, cell growth, differentiation, apoptosis, and antioxidant defense mechanisms. The cellular influx, efflux, subcellular compartmentalization, and trafficking of Zn are coordinated by transporter proteins, solute-linked carriers 30A and 39A (SLC30A and SLC39A), known as the ZnT and Zrt/Irt-like protein (ZIP). Because of its chemical similarity with Zn and Ca, Cd disrupts the physiological functions of both. The concurrent induction of a Zn efflux transporter ZnT1 (SLC30A1) and metallothionein by Cd disrupts the homeostasis and reduces the bioavailability of Zn. The present review highlights the increased mortality and the severity of various diseases among Cd-exposed persons and the roles of Zn and other transport proteins in the manifestation of Cd cytotoxicity. Special emphasis is given to Zn intake levels that may lower the risk of vision loss and bone fracture associated with Cd exposure. The difficult challenge of determining a permissible intake level of Cd is discussed in relation to the recommended dietary Zn intake levels.
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Affiliation(s)
- Ana Cirovic
- Institute of Anatomy, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia; (A.C.); (A.C.)
| | - Aleksandar Cirovic
- Institute of Anatomy, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia; (A.C.); (A.C.)
| | - Supabhorn Yimthiang
- Environmental Safety Technology and Health, School of Public Health, Walailak University, Nakhon Si Thammarat 80160, Thailand;
| | - David A. Vesey
- Centre for Kidney Disease Research, Translational Research Institute, Brisbane, QLD 4102, Australia;
- Department of Kidney and Transplant Services, Princess Alexandra Hospital, Brisbane, QLD 4102, Australia
| | - Soisungwan Satarug
- Centre for Kidney Disease Research, Translational Research Institute, Brisbane, QLD 4102, Australia;
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2
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Satarug S. Is Environmental Cadmium Exposure Causally Related to Diabetes and Obesity? Cells 2023; 13:83. [PMID: 38201287 PMCID: PMC10778334 DOI: 10.3390/cells13010083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/27/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Cadmium (Cd) is a pervasive toxic metal, present in most food types, cigarette smoke, and air. Most cells in the body will assimilate Cd, as its charge and ionic radius are similar to the essential metals, iron, zinc, and calcium (Fe, Zn, and Ca). Cd preferentially accumulates in the proximal tubular epithelium of the kidney, and is excreted in urine when these cells die. Thus, excretion of Cd reflects renal accumulation (body burden) and the current toxicity of Cd. The kidney is the only organ other than liver that produces and releases glucose into the circulation. Also, the kidney is responsible for filtration and the re-absorption of glucose. Cd is the least recognized diabetogenic substance although research performed in the 1980s demonstrated the diabetogenic effects of chronic oral Cd administration in neonatal rats. Approximately 10% of the global population are now living with diabetes and over 80% of these are overweight or obese. This association has fueled an intense search for any exogenous chemicals and lifestyle factors that could induce excessive weight gain. However, whilst epidemiological studies have clearly linked diabetes to Cd exposure, this appears to be independent of adiposity. This review highlights Cd exposure sources and levels associated with diabetes type 2 and the mechanisms by which Cd disrupts glucose metabolism. Special emphasis is on roles of the liver and kidney, and cellular stress responses and defenses, involving heme oxygenase-1 and -2 (HO-1 and HO-2). From heme degradation, both HO-1 and HO-2 release Fe, carbon monoxide, and a precursor substrate for producing a potent antioxidant, bilirubin. HO-2 appears to have also anti-diabetic and anti-obese actions. In old age, HO-2 deficient mice display a symptomatic spectrum of human diabetes, including hyperglycemia, insulin resistance, increased fat deposition, and hypertension.
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Affiliation(s)
- Soisungwan Satarug
- Kidney Disease Research Collaborative, Translational Research Institute, Woolloongabba, Brisbane, QLD 4102, Australia
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3
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Schaefer HR, Flannery BM, Crosby LM, Pouillot R, Farakos SMS, Van Doren JM, Dennis S, Fitzpatrick S, Middleton K. Reassessment of the cadmium toxicological reference value for use in human health assessments of foods. Regul Toxicol Pharmacol 2023; 144:105487. [PMID: 37640100 DOI: 10.1016/j.yrtph.2023.105487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/12/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
The U.S. Food and Drug Administration (FDA) developed an oral toxicological reference value (TRV) for characterizing potential health concerns from dietary exposure to cadmium (Cd). The development of the TRV leveraged the FDA's previously published research including (1) a systematic review for adverse health effects associated with oral Cd exposure and (2) a human physiological based pharmacokinetic (PBPK) model adapted from Kjellstrom and Nordberg (1978) for use in reverse dosimetry applied to the U.S. population. Adverse effects of Cd on the bone and kidney are associated with similar points of departure (PODs) of approximately 0.50 μg Cd/g creatinine for females aged 50-60 based on available epidemiologic data. We also used the upper bound estimate of the renal cortical concentration (50 μg/g Cd) occurring in the U.S. population at 50 years of age as a POD. Based on the output from our reverse dosimetry PBPK Model, a range of 0.21-0.36 μg/kg bw/day was developed for the TRV. The animal data used for the animal TRV derivation (0.63-1.8 μg/kg bw/day) confirms biological plausibility for both the bone and kidney endpoints.
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Affiliation(s)
- Heather R Schaefer
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD, USA.
| | - Brenna M Flannery
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD, USA
| | - Lynn M Crosby
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD, USA
| | | | | | - Jane M Van Doren
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD, USA
| | - Sherri Dennis
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD, USA
| | - Suzanne Fitzpatrick
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD, USA
| | - Karlyn Middleton
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD, USA
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4
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Santonen T, Mahiout S, Alvito P, Apel P, Bessems J, Bil W, Borges T, Bose-O'Reilly S, Buekers J, Cañas Portilla AI, Calvo AC, de Alba González M, Domínguez-Morueco N, López ME, Falnoga I, Gerofke A, Caballero MDCG, Horvat M, Huuskonen P, Kadikis N, Kolossa-Gehring M, Lange R, Louro H, Martins C, Meslin M, Niemann L, Díaz SP, Plichta V, Porras SP, Rousselle C, Scholten B, Silva MJ, Šlejkovec Z, Tratnik JS, Joksić AŠ, Tarazona JV, Uhl M, Van Nieuwenhuyse A, Viegas S, Vinggaard AM, Woutersen M, Schoeters G. How to use human biomonitoring in chemical risk assessment: Methodological aspects, recommendations, and lessons learned from HBM4EU. Int J Hyg Environ Health 2023; 249:114139. [PMID: 36870229 DOI: 10.1016/j.ijheh.2023.114139] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 03/06/2023]
Abstract
One of the aims of the European Human Biomonitoring Initiative, HBM4EU, was to provide examples of and good practices for the effective use of human biomonitoring (HBM) data in human health risk assessment (RA). The need for such information is pressing, as previous research has indicated that regulatory risk assessors generally lack knowledge and experience of the use of HBM data in RA. By recognising this gap in expertise, as well as the added value of incorporating HBM data into RA, this paper aims to support the integration of HBM into regulatory RA. Based on the work of the HBM4EU, we provide examples of different approaches to including HBM in RA and in estimations of the environmental burden of disease (EBoD), the benefits and pitfalls involved, information on the important methodological aspects to consider, and recommendations on how to overcome obstacles. The examples are derived from RAs or EBoD estimations made under the HBM4EU for the following HBM4EU priority substances: acrylamide, o-toluidine of the aniline family, aprotic solvents, arsenic, bisphenols, cadmium, diisocyanates, flame retardants, hexavalent chromium [Cr(VI)], lead, mercury, mixture of per-/poly-fluorinated compounds, mixture of pesticides, mixture of phthalates, mycotoxins, polycyclic aromatic hydrocarbons (PAHs), and the UV-filter benzophenone-3. Although the RA and EBoD work presented here is not intended to have direct regulatory implications, the results can be useful for raising awareness of possibly needed policy actions, as newly generated HBM data from HBM4EU on the current exposure of the EU population has been used in many RAs and EBoD estimations.
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Affiliation(s)
| | | | - Paula Alvito
- National Institute of Health Dr. Ricardo Jorge, 1649-016, Lisbon, Portugal; Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Petra Apel
- German Environment Agency (UBA), Corrensplatz 1, 14195, Berlin, Germany
| | - Jos Bessems
- VITO-Flemish Institute for Technological Research, Mol, Belgium
| | - Wieneke Bil
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Teresa Borges
- General-Directorate of Health, Ministry of Health, 1049-005, Lisbon, Portugal
| | - Stephan Bose-O'Reilly
- Department of Public Health, Health Services Research and Health Technology Assessment, UMIT - Private University for Health Sciences, Medical Informations und Technology, Hall i.T., Austria
| | - Jurgen Buekers
- VITO-Flemish Institute for Technological Research, Mol, Belgium
| | | | - Argelia Castaño Calvo
- National Centre for Environmental Health, Instituto de Salud Carlos III, Madrid, Spain
| | | | | | - Marta Esteban López
- National Centre for Environmental Health, Instituto de Salud Carlos III, Madrid, Spain
| | | | - Antje Gerofke
- German Environment Agency (UBA), Corrensplatz 1, 14195, Berlin, Germany
| | | | | | | | | | | | - Rosa Lange
- German Environment Agency (UBA), Corrensplatz 1, 14195, Berlin, Germany
| | - Henriqueta Louro
- National Institute of Health Dr. Ricardo Jorge, 1649-016, Lisbon, Portugal; ToxOmics-Centre for Toxicogenomics and Human Health, NOVA Medical School, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056, Lisboa, Portugal
| | - Carla Martins
- NOVA National School of Public Health, Public Health Research Centre, NOVA University Lisbon, 1600-560, Lisbon, Portugal; Comprehensive Health Research Center (CHRC), NOVA University Lisbon, 1600-560, Lisbon, Portugal
| | - Matthieu Meslin
- French Agency for Food, Environmental and Occupational Health & Safety, Anses, 14 rue Pierre et Marie Curie, 94701, Maisons-Alfort, France
| | - Lars Niemann
- German Federal Institute for Risk Assessment, Berlin, Germany
| | - Susana Pedraza Díaz
- National Centre for Environmental Health, Instituto de Salud Carlos III, Madrid, Spain
| | - Veronika Plichta
- Austrian Agency for Health and Food Safety, Department Risk Assessment, Spargelfeldstraße 191, 1220, Vienna, Austria
| | | | - Christophe Rousselle
- French Agency for Food, Environmental and Occupational Health & Safety, Anses, 14 rue Pierre et Marie Curie, 94701, Maisons-Alfort, France
| | - Bernice Scholten
- Research Group Risk Analysis for Products in Development, The Netherlands Organisation for Applied Scientific research (TNO), Utrecht, the Netherlands
| | - Maria João Silva
- National Institute of Health Dr. Ricardo Jorge, 1649-016, Lisbon, Portugal; ToxOmics-Centre for Toxicogenomics and Human Health, NOVA Medical School, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056, Lisboa, Portugal
| | | | | | | | - Jose V Tarazona
- National Centre for Environmental Health, Instituto de Salud Carlos III, Madrid, Spain; European Food Safety Authority (EFSA), Parma, Italy
| | - Maria Uhl
- Environment Agency Austria, Spittelauer Lände 5, 1090, Vienna, Austria
| | | | - Susana Viegas
- NOVA National School of Public Health, Public Health Research Centre, NOVA University Lisbon, 1600-560, Lisbon, Portugal; Comprehensive Health Research Center (CHRC), NOVA University Lisbon, 1600-560, Lisbon, Portugal
| | | | - Marjolijn Woutersen
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Greet Schoeters
- VITO-Flemish Institute for Technological Research, Mol, Belgium; University of Antwerp, Dept of Biomedical Sciences, Antwerp, Belgium
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5
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Satarug S, Vesey DA, Gobe GC, Phelps KR. Estimation of health risks associated with dietary cadmium exposure. Arch Toxicol 2023; 97:329-358. [PMID: 36592197 DOI: 10.1007/s00204-022-03432-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 12/13/2022] [Indexed: 01/03/2023]
Abstract
In much of the world, currently employed upper limits of tolerable intake and acceptable excretion of cadmium (Cd) (ECd/Ecr) are 0.83 µg/kg body weight/day and 5.24 µg/g creatinine, respectively. These figures were derived from a risk assessment model that interpreted β2-microglobulin (β2MG) excretion > 300 μg/g creatinine as a "critical" endpoint. However, current evidence suggests that Cd accumulation reduces glomerular filtration rate at values of ECd/Ecr much lower than 5.24 µg/g creatinine. Low ECd/Ecr has also been associated with increased risks of kidney disease, type 2 diabetes, osteoporosis, cancer, and other disorders. These associations have cast considerable doubt on conventional guidelines. The goals of this paper are to evaluate whether these guidelines are low enough to minimize associated health risks reliably, and indeed whether permissible intake of a cumulative toxin like Cd is a valid concept. We highlight sources and levels of Cd in the human diet and review absorption, distribution, kidney accumulation, and excretion of the metal. We present evidence for the following propositions: excreted Cd emanates from injured tubular epithelial cells of the kidney; Cd excretion is a manifestation of current tissue injury; reduction of present and future exposure to environmental Cd cannot mitigate injury in progress; and Cd excretion is optimally expressed as a function of creatinine clearance rather than creatinine excretion. We comprehensively review the adverse health effects of Cd and urine and blood Cd levels at which adverse effects have been observed. The cumulative nature of Cd toxicity and the susceptibility of multiple organs to toxicity at low body burdens raise serious doubt that guidelines concerning permissible intake of Cd can be meaningful.
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Affiliation(s)
- Soisungwan Satarug
- Kidney Disease Research Collaborative, Level 5, Translational Research Institute, Brisbane, QLD, Australia.
| | - David A Vesey
- Kidney Disease Research Collaborative, Level 5, Translational Research Institute, Brisbane, QLD, Australia
- Department of Nephrology, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Glenda C Gobe
- Kidney Disease Research Collaborative, Level 5, Translational Research Institute, Brisbane, QLD, Australia
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, Australia
- NHMRC Centre of Research Excellence for CKD QLD, UQ Health Sciences, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
| | - Kenneth R Phelps
- Stratton Veterans Affairs Medical Center and Albany Medical College, Albany, NY, USA
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6
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Janković S, Stošić M, Miljaković EA, Ćurčić M, Đukić Ćosić D, Buha Đorđević A, Bulat Z, Antonijević B. Cadmium dietary exposure assessment in the adult population and pre-school children in the Republic of Serbia. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2023; 40:67-80. [PMID: 36345249 DOI: 10.1080/19440049.2022.2141467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cadmium (Cd) is a toxic metal, present in all matrices of the environment and a common food contaminant. Human exposure to it may elicit many diverse health impairments. The aim of this study was to assess the dietary exposure to Cd for the adult population and preschool children in Serbia using probabilistic methodology. We measured Cd in 11,227 food samples belonging to 50 food items on the Serbian market. Cd was detected in 90% of the tested food items, and in 30.8% of the overall tested samples. The food item that contributed the most to total dietary Cd intake was potatoes (median Cd concentration of 7 ng/g) in adults, and fruit and vegetable juices in children (median Cd concentration of 19 ng/g). Weekly Cd intake shown as 50th and 95th percentiles were 2.54 and 4.74 µg/kg bw in the adult population, and 3.29 and 4.93 µg/kg bw in children. The results of this study are rather preliminary and should be considered as an indication of the need for further, more refined research, which would contribute to a more realistic risk assessment as a high-priority approach, especially in the case of vulnerable subpopulations such as children. Abbreviations: AT SDR: Agency for Toxic Substances and Disease Registry; EEA: European Environment Agency; EFSA: European Food Safety Authority; FAO/WHO: Food and Agriculture Organization/World Health Organization; HI: hazard index; IARC: International Agency for Research on Cancer; JECFA: Joint FAO/WHO Expert Committee on Food Additives; LOD: limit of detection; Cd: cadmium; TWI: tolerable weekly intake; UNEP: United Nations Environment Program; WI: weekly intake.
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Affiliation(s)
- Saša Janković
- Department for Residues Testing, Institute of Meat Hygiene and Technology, Belgrade, Serbia
| | - Milena Stošić
- Department of Environmental Engineering and Occupational Safety and Health, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
| | - Evica Antonijević Miljaković
- Department of Toxicology 'Akademik Danilo Soldatović', Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Marijana Ćurčić
- Department of Toxicology 'Akademik Danilo Soldatović', Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Danijela Đukić Ćosić
- Department of Toxicology 'Akademik Danilo Soldatović', Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Aleksandra Buha Đorđević
- Department of Toxicology 'Akademik Danilo Soldatović', Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Zorica Bulat
- Department of Toxicology 'Akademik Danilo Soldatović', Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Biljana Antonijević
- Department of Toxicology 'Akademik Danilo Soldatović', Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
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7
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Pouillot R, Santillana Farakos S, Van Doren JM. Modeling the risk of low bone mass and osteoporosis as a function of urinary cadmium in U.S adults aged 50-79 years. ENVIRONMENTAL RESEARCH 2022; 212:113315. [PMID: 35436451 DOI: 10.1016/j.envres.2022.113315] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 03/03/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
We developed an association model to estimate the risk of femoral neck low bone mass and osteoporosis from exposure to cadmium for women and men aged 50-79 in the U.S, as a function of the urinary cadmium (U-Cd) levels. We analyzed data from the NHANES 2005-2014 surveys and evaluated the relationship between U-Cd and femoral neck bone mineral density (BMD) using univariate and multivariate regression models with a combination of NHANES cycle, gender, age, smoking, race/ethnicity, height, body weight, body mass index, lean body mass, diabetes, kidney disease, physical activity, menopausal status, hormone replacement therapy, urinary lead, and prednisone intake as confounding variables. The regression coefficient between U-Cd and femoral neck BMD obtained with the best multivariate regression was used to develop an association model that can estimate the additional risk of low bone mass or osteoporosis in the population given a certain level of U-Cd. Results showed a linear relationship between U-Cd and BMD, conditional to body weight, where individuals with higher U-Cd had decreased BMD values. Our results do not support the hypothesis of a threshold for the effect of Cd on bone. Our model estimates that exposure to Cd results in an increase of 0.51 percentage points (CI95% 0.00, 0.92) of the population diagnosed with osteoporosis, compared to a theoretical absence of exposure. We estimate that 16% (CI95%: 0.00, 40%) of osteoporosis cases in the U.S. 50-79 aged population are a result of Cd exposure. This study presents the first continuous model estimating low bone mass and osteoporosis risk in the U.S. population given actual or potential changes in U-Cd levels. Our model will provide information to inform FDA's Closer to Zero initiative goal to reduce exposure to toxic elements.
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Affiliation(s)
- Régis Pouillot
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD, United States
| | - Sofia Santillana Farakos
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD, United States.
| | - Jane M Van Doren
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD, United States
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8
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Pouillot R, Farakos SS, Spungen J, Schaefer HR, Flannery BM, Van Doren JM. Cadmium physiologically based pharmacokinetic (PBPK) models for forward and reverse dosimetry: Review, evaluation, and adaptation to the U.S. population. Toxicol Lett 2022; 367:67-75. [PMID: 35901988 DOI: 10.1016/j.toxlet.2022.07.812] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 06/20/2022] [Accepted: 07/22/2022] [Indexed: 11/19/2022]
Abstract
The goal of this study was to assess a cadmium (Cd) physiologically based pharmacokinetic (PBPK) model to evaluate Cd toxicological reference values (e.g. reference dose, tolerable intake, minimum risk level) adapted to the U.S. population. We reviewed and evaluated previously published Cd PBPK models and developed further adaptations to the 1978 Kjellström and Nordberg (KN) model. Specifically, we propose adaptations with updated U.S.-specific bodyweight, kidney weight and creatinine excretion models by using NHANES data as well as a stochastic PBPK model that provides credible intervals of uncertainty around mean populational estimates. We provide our model review and adaptations as well as present estimates from the newly adapted models using observed U.S. urinary Cd values as a function of gender and age and given dietary exposure as evaluated from NHANES/WWEIA and U.S. Total Diet Study data. Results show all newly adapted models provide acceptable mean estimates of urinary Cd in the U.S. The stochastic model provides credible intervals to further inform regulatory decision making. Validation of the estimated K-Cd concentration values was not possible as data for a representative population was not available. We developed a web-based tool implementing these models and other potential adaptations to facilitate PBPK model estimate comparisons.
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Affiliation(s)
- Régis Pouillot
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD, United States
| | - Sofia Santillana Farakos
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD, United States.
| | - Judith Spungen
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD, United States
| | - Heather R Schaefer
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD, United States
| | - Brenna M Flannery
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD, United States
| | - Jane M Van Doren
- Division of Risk and Decision Analysis, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD, United States
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9
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Chatterjee M, Kortenkamp A. Cadmium exposures and deteriorations of cognitive abilities: estimation of a reference dose for mixture risk assessments based on a systematic review and confidence rating. Environ Health 2022; 21:69. [PMID: 35836177 PMCID: PMC9281031 DOI: 10.1186/s12940-022-00881-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/24/2022] [Indexed: 05/24/2023]
Abstract
To support a mixture risk assessment with a focus on developmental neurotoxicity we evaluated the strength of evidence for associations of cadmium exposures with declines in IQ by conducting a systematic review and confidence rating. We searched peer-reviewed studies published in English between 2012 and July 2021 and identified 15 eligible studies (11 prospective cohort studies, and 4 cross-sectional studies). Of the 10 studies that observed associations of cadmium exposure with child IQ declines, two achieved an overall "High (H)" confidence rating, five a "Medium to High (M/H)", one a "Medium (M)" and two a "Low (L)" confidence rating. Five studies did not detect significant associations between cadmium exposure and reduced cognitive ability; of these, two received a "High (H)" confidence rating, two an overall rating of "Medium to High (M/H)" and one a "Medium (M)" rating. The null findings reported by the "High (H)" and Medium to High (M/H)" studies could partly be explained by low exposures to cadmium or confounding with high levels of lead. By using a one-compartment toxicokinetic model in a reverse dosimetry approach, we estimated that a daily intake of 0.2 μg/kg body weight/day corresponds to urinary cadmium levels no longer associated with cognitive declines observed in a "High (H)"-confidence study. This estimate is 1.8-fold lower than the current health-based guidance value (HBGV) for kidney toxicity of 0.36 μg/kg bodyweight/day established by the European Food Safety Authority (EFSA). Our value does not have the normative character associated with health-based guidance values and is intended only as a reasonable estimate for the purpose of mixture risk assessments. However, with cadmium exposures in Europe between 0.28 (middle bound) and up to 0.52 μg/kg bodyweight/day (95th percentile), our review suggests that pregnant women and children are poorly protected against neurodevelopmental effects. This warrants a revision of the current HBGV.
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Affiliation(s)
- Mousumi Chatterjee
- College of Health, Medicine and Life Sciences, Brunel University London, Centre for Pollution Research and Policy Kingston Lane, Uxbridge, UB8 3PH UK
| | - Andreas Kortenkamp
- College of Health, Medicine and Life Sciences, Brunel University London, Centre for Pollution Research and Policy Kingston Lane, Uxbridge, UB8 3PH UK
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10
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Carne G, Makowski D, Carrillo S, Guérin T, Jitaru P, Reninger JC, Rivière G, Bemrah N. Probabilistic determination of a maximum acceptable level of contaminant to reduce the risk of overexposure for a novel or emerging food: the case of cadmium in edible seaweed in the French population. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1439-1452. [PMID: 35724341 DOI: 10.1080/19440049.2022.2087921] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
European and French populations are overexposed to cadmium (Cd) through their foods. The risk of increased cadmium exposure for consumers needs to be limited by reduced maximum limits (ML) for novel foodstuffs such as edible seaweed in France. The objective was to derive a low and protective cadmium concentration in edible seaweeds to limit cadmium overexposure in consumers. To do so, we applied a probabilistic approach to the data collected on French seaweed consumers, taking into account other sources of exposure for cadmium. This approach led to the identification of a cadmium concentration which should ensure that the seaweed-consuming population does not exceed the tolerable daily intake (TDI) of cadmium according to a probability of cases, when simultaneously exposed to other cadmium dietary sources. Considering the 5% of the population exceeding TDI, the estimated ML is equal to 0.35 mg Cd kg-1 dry matter of seaweed as an unprocessed food with a 95% confidence interval of [0.18,1.09]. The proposed approach is generic and could be applied to other relevant food/substance pairs when considering the setting of MLs in the regulatory system. It ensures better protection of consumer health.
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Affiliation(s)
- Géraldine Carne
- Risk Assessment Department, ANSES, Maisons-Alfort Cedex, France
| | - David Makowski
- INRAE AgroParisTech University Paris-Saclay, UMR MIA, Paris, France
| | | | - Thierry Guérin
- Strategy and Programmes Department, ANSES, Maisons-Alfort Cedex, France
| | - Petru Jitaru
- Laboratory for Food Safety, ANSES, Maisons-Alfort Cedex, France
| | | | - Gilles Rivière
- Risk Assessment Department, ANSES, Maisons-Alfort Cedex, France
| | - Nawel Bemrah
- Risk Assessment Department, ANSES, Maisons-Alfort Cedex, France
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Burden of osteoporosis and costs associated with human biomonitored cadmium exposure in three European countries: France, Spain and Belgium. Int J Hyg Environ Health 2021; 234:113747. [PMID: 33862487 DOI: 10.1016/j.ijheh.2021.113747] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 03/24/2021] [Accepted: 03/24/2021] [Indexed: 11/23/2022]
Abstract
Cadmium (Cd) is a toxic heavy metal widespread in the environment leading to human exposure in particular through diet (when smoking is excluded), as documented by recent human biomonitoring (HBM) surveys. Exposure to Cd at environmental low-exposure levels has been associated with adverse effects such as renal toxicity and more recently bone effects. The implication, even if limited, of Cd in the etiology of osteoporosis can be of high importance at the population level given the significant prevalence of osteoporosis and the ubiquitous and life-long exposure to Cd. Therefore, the osteoporosis cases attributable to Cd exposure was estimated in three European countries (Belgium, France and Spain), based on measured urinary Cd levels from HBM studies conducted in these countries. The targeted population was women over 55 years old, for which risk levels associated with environmental Cd exposure were available. Around 23% of the cases were attributed to Cd exposure. Moreover, in a prospective simulation approach of lifelong urinary Cd concentrations assuming different intakes scenarios, future osteoporosis attributable cases were calculated, based on urinary Cd levels measured in women aged under 55. Between 6 and 34% of the considered populations under 55 years were at risk for osteoporosis. Finally, the costs associated to the burden of osteoporosis-related fractures attributable to Cd for each country targeted in this paper were assessed, standing for a major contributing role of Cd exposure in the overall social costs related to osteoporosis. Absolute costs ranged between 0.12 (low estimate in Belgium) and 2.6 billion Euros (high estimate in France) in women currently over 55 years old and at risk for fractures. Our results support the importance of reducing exposure of the general population to Cd.
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