1
|
Manh HD, Kido T, Takasuga T, Yamashita M, Giang LM, Nakagawa H. The Relationship of Dioxin Levels in Serum of 9-Year-Old Vietnamese Children and Their Mothers’ Breast Milk. TOXICS 2022; 10:toxics10040155. [PMID: 35448416 PMCID: PMC9030040 DOI: 10.3390/toxics10040155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/14/2022] [Accepted: 03/19/2022] [Indexed: 02/04/2023]
Abstract
In this study, we measured the concentrations of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in the blood of 9-year-old children living in a dioxin hotspot area and a nonexposed area in Vietnam. Forty-five blood samples were collected in the hotspot area while twelve pooled blood samples were collected in the nonexposed area. We found that the dioxin level of children in the hotspot was significantly higher than that of children in the nonexposed area. The total TEQ of PCDD/Fs in the hotspot and the nonexposed was 10.7 and 3.3 pg TEQ/g fat, respectively. However, TCDD, the maker of Agent Orange, was not detected in the blood of children in the hotspot area. In the hotspot area, four congeners 1,2,3,4,6,7,8-HpCDD, 1,2,3,4,7,8-HxCDF, 1,2,3,6,7,8-HxCDF, and 1,2,3,4,6,7,8-HpCDF in mothers’ breast milk showed a significantly positive correlation with those in children’s serum although the correlations of 1,2,3,7,8-PeCDD and 2,3,4,7,8-PeCDF were not significant. In addition, the duration of breastfeeding also correlates with dioxins in children. These results suggested that children in the hotspot area were exposed to dioxin through mothers’ milk and other foods or environmental factors. The present study is the first study that shows dioxin levels in Vietnamese children.
Collapse
Affiliation(s)
- Ho Dung Manh
- Faculty of Pharmacy, Lac Hong University, No. 10 Huynh Van Nghe, Buu Long, Bien Hoa 02513, Dong Nai, Vietnam;
| | - Teruhiko Kido
- Division of Health Sciences, Graduate School of Medical Science, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan
- Correspondence: ; Tel.: +81-762652565
| | - Takumi Takasuga
- Shimadzu Techno-Research Inc., 1 Nishinokyo Shimoaicho Nakagyo-ku, Kyoto 604-8436, Japan; (T.T.); (M.Y.)
| | - Michiko Yamashita
- Shimadzu Techno-Research Inc., 1 Nishinokyo Shimoaicho Nakagyo-ku, Kyoto 604-8436, Japan; (T.T.); (M.Y.)
| | - Le Minh Giang
- 10-80 Division, Hanoi Medical University, No. 1 Ton That Tung, Dong Da, Hanoi 116500, Vietnam;
| | - Hideaki Nakagawa
- Department of Hygiene, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku 920-0265, Japan;
| |
Collapse
|
2
|
Wang L, Ding G, Zhou Z, Liu X, Wang Y, Xie H, Xu T, Wang P, Zhao B. Level and characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans in feed and feed additives. J Environ Sci (China) 2017; 51:324-331. [PMID: 28115145 DOI: 10.1016/j.jes.2016.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 06/13/2016] [Accepted: 07/29/2016] [Indexed: 06/06/2023]
Abstract
Feed security is a prerequisite for safe animal food products. In this study, 13 groups of feed and feed ingredients, totaling 2067 samples, were collected in the period of 2011 to 2014 from China. The highest mean level of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) was found in fish meals and shell powders, with a concentration of 60.35ng/kg, followed by mineral origin materials. In terms of the toxicity equivalent concentration, the fish oil group showed the highest PCDD/F levels because of their bio-accumulation through the aquatic food chain, with an average concentration of 1.26ng WHO-TEQ/kg, while the lowest level was observed in compound feed for chickens and pigs, with an average value of 0.16ng WHO-TEQ/kg. OCDD and OCDF were the predominant congeners in all groups except fish oils, in which the primary congeners were 2,3,4,7,8-PeCDF and 2,3,7,8-TCDF. For zinc chloride samples, different from other zinc-based compound samples, the main congeners were 1,2,3,4,6,7,8-HpCDF (17%), 1,2,3,4,7,8,9-HpCDF (15%), 1,2,3,4,7,8-HxCDF (12%) and OCDF (30%). Considering toxicity equivalency factors, the dominant congeners were 2,3,4,7,8-PeCDF, 1, 2,3,4,7,8-HxCDF, 2,3,7,8-TCDF and 1,2,3,7,8-PeCDD, and the contribution to the total TEQ was 29%, 16%, 14% and 12%, respectively. Overall, 2.1% (43 out of 2067) of all the analyzed samples exceeded the different individual 'European Union maximum limited levels for PCDD/Fs. This study is beneficial for the determination of the status of contamination levels of feed and feed ingredients.
Collapse
Affiliation(s)
- Lingyun Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing, China.
| | - Gangdou Ding
- Dioxin Laboratory, Chinese Academy of Inspection and Quarantine Comprehensive Test Center, Beijing 100123, China
| | - Zhiguang Zhou
- State Environmental Protection Key Laboratory of Dioxin Pollution Control, National Research Center for Environmental Analysis and Measurement, Beijing 100029, China
| | - Xun Liu
- Dioxin Laboratory, Chinese Academy of Inspection and Quarantine Comprehensive Test Center, Beijing 100123, China
| | - Yixiao Wang
- Dioxin Laboratory, Chinese Academy of Inspection and Quarantine Comprehensive Test Center, Beijing 100123, China
| | - HeidQunhui Xie
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing, China
| | - Tuan Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing, China
| | - Pu Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing, China
| | - Bin Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing, China.
| |
Collapse
|
3
|
Meng G, Feng Y, Nie Z, Wu X, Wei H, Wu S, Yin Y, Wang Y. Internal exposure levels of typical POPs and their associations with childhood asthma in Shanghai, China. ENVIRONMENTAL RESEARCH 2016; 146:125-135. [PMID: 26748225 DOI: 10.1016/j.envres.2015.12.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 12/16/2015] [Accepted: 12/21/2015] [Indexed: 06/05/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are common persistent organic pollutants (POPs) that may be associated with childhood asthma. The concentrations of PBDEs, PCBs and OCPs were analyzed in pooled serum samples from both asthmatic and non-asthmatic children. The differences in the internal exposure levels between the case and control groups were tested (p value <0.0012). The associations between the internal exposure concentrations of the POPs and childhood asthma were estimated based on the odds ratios (ORs) calculated using logistic regression models. There were significant differences in three PBDEs, 26 PCBs and seven OCPs between the two groups, with significantly higher levels in the cases. The multiple logistic regression models demonstrated that the internal exposure concentrations of a number of the POPs (23 PCBs, p,p'-DDE and α-HCH) were positively associated with childhood asthma. Some synergistic effects were observed when the children were co-exposed to the chemicals. BDE-209 was positively associated with asthma aggravation. This study indicates the potential relationships between the internal exposure concentrations of particular POPs and the development of childhood asthma.
Collapse
Affiliation(s)
- Ge Meng
- School of Public Health, Shanghai Jiaotong University, Shanghai 200025, PR China
| | - Yan Feng
- School of Public Health, Shanghai Jiaotong University, Shanghai 200025, PR China
| | - Zhiqing Nie
- School of Environmental Science & Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Xiaomeng Wu
- School of Public Health, Shanghai Jiaotong University, Shanghai 200025, PR China
| | - Hongying Wei
- School of Public Health, Shanghai Jiaotong University, Shanghai 200025, PR China
| | - Shaowei Wu
- Department of Occupational and Environmental Health Sciences, Peking University School of Public Health, Beijing 100191, China; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Yong Yin
- Shanghai Children's Medical Center, Shanghai 200127, PR China.
| | - Yan Wang
- School of Public Health, Shanghai Jiaotong University, Shanghai 200025, PR China; Hongqiao International Institute of Medicine, Shanghai Tongren Hospital / Faculty of Basic Medicine (or Faculty of Public Health), Shanghai Jiao Tong University School of Medicine; MOE and Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| |
Collapse
|
4
|
Lancz K, Hertz-Picciotto I, Jusko TA, Murínová L, Wimmerová S, Sovčíková E, Dedík L, Strémy M, Drobná B, Farkašová D, Trnovec T. Duration of breastfeeding and serum PCB 153 concentrations in children. ENVIRONMENTAL RESEARCH 2015; 136:35-9. [PMID: 25460618 PMCID: PMC4263313 DOI: 10.1016/j.envres.2014.09.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 08/05/2014] [Accepted: 09/19/2014] [Indexed: 05/24/2023]
Abstract
Polychlorinated biphenyls (PCBs) are toxic, persistent, and bioaccumulative chemicals which, because of their lipophilic properties, are abundant in human breast milk. Breastfed infants are therefore at risk of being exposed to considerable amounts of PCBs. The commonly used exposure estimations, based solely on breast milk PCB levels and duration of breastfeeding, may lead to exposure misclassification. To improve assessments of exposure to PCBs, we determined PCB 153 serum concentration, as a model substance for PCBs, at the critical time of weaning for each child in 305 breastfed infants from 5 single time point concentration measurements spread over 7 years and data on duration of breastfeeding, using an earlier developed model of the system type. We approximated the dependence of PCB 153 serum concentration, Ctbf, adjusted to cord serum concentration, C0, on nursing period, by a polynomial function Ctbf/C0=0.596+0.278t-0.0047t(2) which reliably predicts exposure to PCB 153 of breastfed infants, important for assessment of dose-outcome relationships. Adjustment of current serum concentrations to cord serum concentration improved validity of exposure assessment.
Collapse
Affiliation(s)
- Kinga Lancz
- Slovak Medical University, Limbová 14, 83303 Bratislava, Slovakia.
| | - Irva Hertz-Picciotto
- Division of Environmental and Occupational Health, Department of Public Health Sciences, University of California, Davis, CA 95616, USA.
| | - Todd A Jusko
- Division of Epidemiology, Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.
| | - Lubica Murínová
- Slovak Medical University, Limbová 14, 83303 Bratislava, Slovakia.
| | - Soňa Wimmerová
- Slovak Medical University, Limbová 14, 83303 Bratislava, Slovakia.
| | - Eva Sovčíková
- Slovak Medical University, Limbová 14, 83303 Bratislava, Slovakia.
| | - Ladislav Dedík
- Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Vazovova 5, 812 43 Bratislava I, Slovakia.
| | - Maximilián Strémy
- Research Centre of Progressive Technologies, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, Hajdóczyho 1, 917 24 Trnava, Slovakia.
| | - Beata Drobná
- Slovak Medical University, Limbová 14, 83303 Bratislava, Slovakia.
| | - Dana Farkašová
- Slovak Medical University, Limbová 14, 83303 Bratislava, Slovakia.
| | - Tomáš Trnovec
- Slovak Medical University, Limbová 14, 83303 Bratislava, Slovakia.
| |
Collapse
|
5
|
Urban JD, Wikoff DS, Bunch ATG, Harris MA, Haws LC. A review of background dioxin concentrations in urban/suburban and rural soils across the United States: implications for site assessments and the establishment of soil cleanup levels. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 466-467:586-597. [PMID: 23955251 DOI: 10.1016/j.scitotenv.2013.07.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 07/17/2013] [Accepted: 07/19/2013] [Indexed: 06/02/2023]
Abstract
Over the last several decades, dioxin releases have decreased >90%, leading to a corresponding decrease in human body burdens. In addition, the weight-of-evidence indicates that soil exposures have little impact on human body burdens of dioxin-like compounds (DLCs), with dietary sources being the greatest contributor. In spite of this, USEPA recently proposed substantially lower preliminary remediation goals (PRGs) for soil based on their new oral reference dose (RfD) for dioxin. As such, it is important to understand how these lower soil PRGs compare to background concentrations in urban/suburban and rural soils. The objective of this evaluation was to conduct a comprehensive review of available data concerning background levels of DLCs in U.S. soils. There was substantial variability in how the soil dioxin data were presented (e.g., raw vs. summary data, congener vs. toxic equivalency [TEQ] concentration, number of DLC congeners reported, etc.). In cases where TEQ estimates were based on outdated TEFs and congener-specific data was provided, TEQ concentrations were recalculated using the current WHO2006 TEFs. The data available for rural soils were generally more robust than for urban/suburban soils. Not surprisingly, background levels of DLCs in urban/suburban soils were higher and more variable than in rural soils: 0.1-186 vs. 0.1-22.9 ng/kg TEQ, respectively. In several cases, incomplete soil DLC data were available (e.g., DL-PCBs not included) and, as such, calculated TEQ concentrations likely underestimate actual background levels. Though the current data are somewhat limited, these findings indicate that background DLC concentrations in urban/suburban soils may exceed the USEPA's updated PRGs based on the oral RfD, and are expected to substantially exceed future PRGs to be developed based on the forthcoming dioxin cancer slope factor. This demonstrates a need to characterize anthropogenic background DLCs in non-rural areas across the US to avoid establishing soil screening levels and PRGs that are lower than background concentrations.
Collapse
Affiliation(s)
- Jonathan D Urban
- ToxStrategies, Inc., 9390 Research Blvd, Suite 250, Austin, TX 78759, United States.
| | | | | | | | | |
Collapse
|
6
|
The importance of problem formulations in risk assessment: A case study involving dioxin-contaminated soil. Regul Toxicol Pharmacol 2013; 66:208-16. [DOI: 10.1016/j.yrtph.2013.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 03/21/2013] [Accepted: 03/22/2013] [Indexed: 11/22/2022]
|
7
|
Demond A, Franzblau A, Garabrant D, Jiang X, Adriaens P, Chen Q, Gillespie B, Hao W, Hong B, Jolliet O, Lepkowski J. Human exposure from dioxins in soil. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:1296-1302. [PMID: 22136605 DOI: 10.1021/es2022363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Dioxins are a family of chemical compounds that has received considerable attention, both historically and currently. This article reviews scientific field studies that examine the relationship between living on soil contaminated with dioxins and the level of dioxins in people's serum, with an emphasis on the University of Michigan Dioxin Exposure Study (UMDES), the largest and most comprehensive study of its kind. These studies conclude that the levels of dioxins in serum are most strongly correlated with age, gender, body mass index, weight loss, breast feeding, and smoking. Levels of dioxins in soil are not significant predictors for dioxin concentrations in serum. The increase in serum dioxin levels that is seen with age results from historic exposure and does not represent ongoing exposure. Based on the scientific field studies conducted to date, it appears that, in the absence of the consumption of contaminated animal products, there is little evidence of ongoing exposure from contaminated soil.
Collapse
Affiliation(s)
- A Demond
- College of Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Decrease of internal exposure to chlororganic compounds and heavy metals in children in Baden-Württemberg between 1996/1997 and 2008/2009. Int J Hyg Environ Health 2012; 215:196-201. [DOI: 10.1016/j.ijheh.2011.10.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 06/16/2011] [Accepted: 10/26/2011] [Indexed: 11/20/2022]
|