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Xiong Z, Cheng J, Hu Y, Chen S, Qiu Y, Yang A, Wu Z, Li X, Chen H. A composite enzyme derived from papain and chymotrypsin reduces the Allergenicity of Cow's Milk allergen casein by targeting T and B cell epitopes. Food Chem 2024; 459:140315. [PMID: 38986203 DOI: 10.1016/j.foodchem.2024.140315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 06/30/2024] [Accepted: 07/01/2024] [Indexed: 07/12/2024]
Abstract
Casein, the major allergen in cow's milk, presents a significant challenge in providing nutritional support for children with allergies. To address this issue, we investigated a composite enzyme, comprising papain and chymotrypsin, to reduce the allergenicity of casein. Enzymatic hydrolysis induced substantial structural changes in casein, diminishing its affinity for specific IgE and IgG antibodies. Additionally, in a BALB/c mouse model, casein hydrolysate alleviated allergic symptoms, evidenced by lower serum IgE and IgG levels, reduced plasma histamine, and decreased Th2 cytokine release during cell co-culture. Peptidomic analysis revealed a 52.38% and 60% reduction in peptides containing IgE epitopes in casein hydrolyzed by the composite enzyme compared to papain and chymotrypsin, respectively, along with a notable absence of previously reported T cell epitopes. These results demonstrate the potential of enzyme combinations to enhance the efficiency of epitope destruction in allergenic proteins, providing valuable insights into the development of hypoallergenic dairy products.
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Affiliation(s)
- Ziyi Xiong
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; School of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
| | - Jianfeng Cheng
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; School of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
| | - Yongxin Hu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; School of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
| | - Siyi Chen
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; School of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
| | - Yu Qiu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; School of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
| | - Anshu Yang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Sino-German Joint Research Institute, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
| | - Zhihua Wu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Sino-German Joint Research Institute, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
| | - Xin Li
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; School of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China.
| | - Hongbing Chen
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Sino-German Joint Research Institute, Nanchang University, Nanchang, Jiangxi 330047, P. R. China; Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, Jiangxi 330047, P. R. China
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2
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Bellotti D, Leveraro S, Remelli M. Metal-protein solution interactions investigated using model systems: Thermodynamic and spectroscopic methods. Methods Enzymol 2023; 687:279-341. [PMID: 37666636 DOI: 10.1016/bs.mie.2023.05.004] [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] [Indexed: 09/06/2023]
Abstract
The first-row D-block metal ions are essential for the physiology of living organisms, functioning as cofactors in metalloproteins or structural components for enzymes: almost half of all proteins require metals to perform the biological function. Understanding metal-protein interactions is crucial to unravel the mysteries behind molecular biology, understanding the effects of metal imbalance and toxicity or the diseases due to disorders in metal homeostasis. Metal-protein interactions are dynamic: they are noncovalent and affected by the environment to which the system is exposed. To reach a complete comprehension of the system, different conditions must be considered for the experimental investigation, in order to get information on the species distribution, the ligand coordination modes, complex stoichiometry and geometry. Thinking about the whole environment where a protein acts, investigations are often challenging, and simplifications are required to study in detail the mechanisms of metal interaction. This chapter is intended to help researchers addressing the problem of the complexity of metal-protein interactions, with particular emphasis on the use of peptides as model systems for the metal coordination site. The thermodynamic and spectroscopic methods most widely employed to investigate the interaction between metal ions and peptides in solution are here covered. These include solid-phase peptide synthesis, potentiometric titrations, calorimetry, electrospray ionization mass spectrometry, UV-Vis spectrophotometry, circular dichroism (CD), nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR). Additional experimental methods, which can be employed to study metal complexes with peptides, are also briefly mentioned. A case-study is finally reported providing a practical example of the investigation of metal-protein interaction by means of thermodynamic and spectroscopic methods applied to peptide model systems.
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Affiliation(s)
- Denise Bellotti
- University of Ferrara, Department of Chemical, Pharmaceutical and Agricultural Sciences, via L. Borsari, Ferrara, Italy; Faculty of Chemistry, University of Wrocław, F. Joliot-Curie, Wrocław, Poland
| | - Silvia Leveraro
- University of Ferrara, Department of Chemical, Pharmaceutical and Agricultural Sciences, via L. Borsari, Ferrara, Italy
| | - Maurizio Remelli
- University of Ferrara, Department of Chemical, Pharmaceutical and Agricultural Sciences, via L. Borsari, Ferrara, Italy.
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Wang ZX, Hu L, Wang WJ, Kong FY, Wei MJ, Fang HL, Li QL, Wang W. One-pot green preparation of deep-ultraviolet and dual-emission carbon nanodots for dual-channel ratiometric determination of polyphenol in tea sample. Mikrochim Acta 2022; 189:241. [PMID: 35648245 DOI: 10.1007/s00604-022-05330-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/08/2022] [Indexed: 01/18/2023]
Abstract
A novel deep-ultraviolet and dual-emission carbon nanodots (DUCDs)-based dual-channel ratiometric probe was prepared by a one-pot environmental-friendly hydrothermal process using guanidine as the only starting material for sensing polyphenol in tea sample (TPPs). Under the exposure to TPPs, the DUCDs not only provided a characteristic colorimetric response to TPPs, but also displayed TPPs-sensitive ratiometric fluorescence quenching. The detection mechanism was proved to be that enrichment-specific hydroxyl sites (e.g., -NH2 and -COOH) of DUCDs can specifically react with phenolic hydroxyl groups of TPPs to generate dynamic amide and carboxylate bonds by dehydration and/or condensation reaction. As a result, a new carbon nanomaterial with decrement of surface passivation groups, inherent light-absorbing, and invalid fluorescence emission was generated. The ratio (FL297nm/FL395nm) of fluorescence intensity at 297 nm and 395 nm of DUCDs excited at 275 nm decreased with increasing TPPs concentration. The linearity range was 5.0 ng/mL to 100 µg/mL with a detection limit (DL) of 3.5 ± 0.04 ng/mL for TPPs (n = 3, 3σ/k). Colorimetry of DUCDs, best measured as absorbance at 320 nm, was increased linearly in the TPP concentration range 200 ng/mL-200 µg/mL with a DL of 94.7 ± 0.04 ng/mL (n = 3, 3σ/k). The probe was successfully applied to the determination of TPPs in real tea samples, showing potential application prospects in food analysis.
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Affiliation(s)
- Zhong-Xia Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Lei Hu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Wen-Juan Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Fen-Ying Kong
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Mei-Jie Wei
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Hai-Lin Fang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Qi-Le Li
- School of Science, Jiangsu Ocean University, Lianyungang, 222005, China.
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.
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4
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Huang S, Liu M, Li H. In situ green synthesis of lysozyme/silver nanoparticles sol and their antimicrobial properties. NEW J CHEM 2022. [DOI: 10.1039/d2nj01744j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Lysozyme/silver nanoparticles sol (LZM/AgNPs) were synthesized in situ with the assistance of ultraviolet irradiation with enhanced antibacterial activity.
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Affiliation(s)
- Shan Huang
- State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Mengru Liu
- State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Hailong Li
- State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
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Scollo F, Seggio M, Torrisi RL, Bua RO, Zimbone M, Contino A, Maccarrone G. New fluorescent-labelled nanoparticles: synthesis, characterization and interactions with cysteine and homocysteine to evaluate their stability in aqueous solution. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-019-01241-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Preston GW, Dagnino S, Ponzi E, Sozeri O, van Veldhoven K, Barratt B, Liu S, Grigoryan H, Lu SS, Rappaport SM, Chung KF, Cullinan P, Sinharay R, Kelly FJ, Chadeau-Hyam M, Vineis P, Phillips DH. Relationships between airborne pollutants, serum albumin adducts and short-term health outcomes in an experimental crossover study. CHEMOSPHERE 2020; 239:124667. [PMID: 31499299 DOI: 10.1016/j.chemosphere.2019.124667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/21/2019] [Accepted: 08/24/2019] [Indexed: 06/10/2023]
Abstract
Exposure to air pollution can have both short-term and long-term effects on health. However, the relationships between specific pollutants and their effects can be obscured by characteristics of both the pollution and the exposed population. One way of elucidating the relationships is to link exposures and internal changes at the level of the individual. To this end, we combined personal exposure monitoring (59 individuals, Oxford Street II crossover study) with mass-spectrometry-based analyses of putative serum albumin adducts (fixed-step selected reaction monitoring). We attempted to infer adducts' identities using data from another, higher-resolution mass spectrometry method, and were able to detect a semi-synthetic standard with both methods. A generalised least squares regression method was used to test for associations between amounts of adducts and pollution measures (ambient concentrations of nitrogen dioxide and particulate matter), and between amounts of adducts and short-term health outcomes (measures of lung health and arterial stiffness). Amounts of some putative adducts (e.g., one with a positive mass shift of ∼143 Da) were associated with exposure to pollution (11 associations), and amounts of other adducts were associated with health outcomes (eight associations). Adducts did not appear to provide a link between exposures and short-term health outcomes.
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Affiliation(s)
- George W Preston
- MRC-PHE Centre for Environment & Health, Department of Analytical, Environmental & Forensic Sciences, School of Population Health & Environmental Sciences, Faculty of Life Sciences & Medicine, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Sonia Dagnino
- MRC-PHE Centre for Environment & Health, Department of Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, Norfolk Place, London, W2 1PG, UK
| | - Erica Ponzi
- MRC-PHE Centre for Environment & Health, Department of Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, Norfolk Place, London, W2 1PG, UK; Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Hirschengraben 84, 8001, Zurich, Switzerland
| | - Osman Sozeri
- MRC-PHE Centre for Environment & Health, Department of Analytical, Environmental & Forensic Sciences, School of Population Health & Environmental Sciences, Faculty of Life Sciences & Medicine, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Karin van Veldhoven
- MRC-PHE Centre for Environment & Health, Department of Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, Norfolk Place, London, W2 1PG, UK
| | - Benjamin Barratt
- MRC-PHE Centre for Environment & Health, Department of Analytical, Environmental & Forensic Sciences, School of Population Health & Environmental Sciences, Faculty of Life Sciences & Medicine, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Sa Liu
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, CA, 94720, USA
| | - Hasmik Grigoryan
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, CA, 94720, USA
| | - Sixin S Lu
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, CA, 94720, USA
| | - Stephen M Rappaport
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, CA, 94720, USA
| | - Kian Fan Chung
- National Heart & Lung Institute, Faculty of Medicine, Imperial College London, Royal Brompton Campus, London, SW3 6LY, UK; NIHR Biomedical Research Unit, Royal Brompton & Harefield NHS Trust, London, SW3 6NP, UK
| | - Paul Cullinan
- National Heart & Lung Institute, Faculty of Medicine, Imperial College London, Royal Brompton Campus, London, SW3 6LY, UK; NIHR Biomedical Research Unit, Royal Brompton & Harefield NHS Trust, London, SW3 6NP, UK
| | - Rudy Sinharay
- Pulmonary, Adult Critical Care and Sleep Directorate, Guy's and St Thomas' NHS Foundation Trust, London, SE1 7EH, UK
| | - Frank J Kelly
- MRC-PHE Centre for Environment & Health, Department of Analytical, Environmental & Forensic Sciences, School of Population Health & Environmental Sciences, Faculty of Life Sciences & Medicine, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Marc Chadeau-Hyam
- MRC-PHE Centre for Environment & Health, Department of Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, Norfolk Place, London, W2 1PG, UK
| | - Paolo Vineis
- MRC-PHE Centre for Environment & Health, Department of Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, Norfolk Place, London, W2 1PG, UK
| | - David H Phillips
- MRC-PHE Centre for Environment & Health, Department of Analytical, Environmental & Forensic Sciences, School of Population Health & Environmental Sciences, Faculty of Life Sciences & Medicine, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK.
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7
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Allenspach MD, Fuchs JA, Doriot N, Hiss JA, Schneider G, Steuer C. Quantification of hydrolyzed peptides and proteins by amino acid fluorescence. J Pept Sci 2018; 24:e3113. [DOI: 10.1002/psc.3113] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/14/2018] [Accepted: 06/19/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Martina D. Allenspach
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences; Swiss Federal Institute of Technology (ETH); Vladimir-Prelog-Weg 4 8093 Zuerich Switzerland
| | - Jens A. Fuchs
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences; Swiss Federal Institute of Technology (ETH); Vladimir-Prelog-Weg 4 8093 Zuerich Switzerland
| | - Nicolas Doriot
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences; Swiss Federal Institute of Technology (ETH); Vladimir-Prelog-Weg 4 8093 Zuerich Switzerland
| | - Jan A. Hiss
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences; Swiss Federal Institute of Technology (ETH); Vladimir-Prelog-Weg 4 8093 Zuerich Switzerland
| | - Gisbert Schneider
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences; Swiss Federal Institute of Technology (ETH); Vladimir-Prelog-Weg 4 8093 Zuerich Switzerland
| | - Christian Steuer
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences; Swiss Federal Institute of Technology (ETH); Vladimir-Prelog-Weg 4 8093 Zuerich Switzerland
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Preston G, Plusquin M, Sozeri O, van Veldhoven K, Bastian L, Nawrot TS, Chadeau-Hyam M, Phillips DH. Refinement of a Methodology for Untargeted Detection of Serum Albumin Adducts in Human Populations. Chem Res Toxicol 2017; 30:2120-2129. [PMID: 29092396 PMCID: PMC5736992 DOI: 10.1021/acs.chemrestox.7b00186] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Indexed: 11/29/2022]
Abstract
Covalently modified blood proteins (e.g., serum albumin adducts) are increasingly being viewed as potential biomarkers via which the environmental causes of human diseases may be understood. The notion that some (perhaps many) modifications have yet to be discovered has led to the development of untargeted adductomics methods, which attempt to capture entire populations of adducts. One such method is fixed-step selected reaction monitoring (FS-SRM), which analyses distributions of serum albumin adducts via shifts in the mass of a tryptic peptide [Li et al. (2011) Mol. Cell. Proteomics 10, M110.004606]. Working on the basis that FS-SRM might be able to detect biological variation due to environmental factors, we aimed to scale the methodology for use in an epidemiological setting. Development of sample preparation methods led to a batch workflow with increased throughput and provision for quality control. Challenges posed by technical and biological variation were addressed in the processing and interpretation of the data. A pilot study of 20 smokers and 20 never-smokers provided evidence of an effect of smoking on levels of putative serum albumin adducts. Differences between smokers and never-smokers were most apparent in putative adducts with net gains in mass between 105 and 114 Da (relative to unmodified albumin). The findings suggest that our implementation of FS-SRM could be useful for studying other environmental factors with relevance to human health.
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Affiliation(s)
- George
W. Preston
- MRC-PHE
Centre for Environment and Health, Department of Analytical, Environmental,
and Forensic Sciences, Faculty of Life Sciences and Medicine, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Michelle Plusquin
- MRC-PHE
Centre for Environment and Health, Department of Epidemiology and
Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, London W2 1PG, United Kingdom
- Centre
for Environmental Sciences, Hasselt University, 3590 Hasselt, Belgium
| | - Osman Sozeri
- MRC-PHE
Centre for Environment and Health, Department of Analytical, Environmental,
and Forensic Sciences, Faculty of Life Sciences and Medicine, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Karin van Veldhoven
- MRC-PHE
Centre for Environment and Health, Department of Epidemiology and
Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, London W2 1PG, United Kingdom
| | - Lilian Bastian
- MRC-PHE
Centre for Environment and Health, Department of Analytical, Environmental,
and Forensic Sciences, Faculty of Life Sciences and Medicine, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Tim S. Nawrot
- Centre
for Environmental Sciences, Hasselt University, 3590 Hasselt, Belgium
- Environment
and Health Unit, Leuven University, 3000 Leuven, Belgium
| | - Marc Chadeau-Hyam
- MRC-PHE
Centre for Environment and Health, Department of Epidemiology and
Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, London W2 1PG, United Kingdom
| | - David H. Phillips
- MRC-PHE
Centre for Environment and Health, Department of Analytical, Environmental,
and Forensic Sciences, Faculty of Life Sciences and Medicine, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
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