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Thao PN, Nishijo M, Tai PT, Nghi TN, Hoa VT, Anh TH, Tien TV, Nishino Y, Nishijo H. Impacts of perinatal dioxin exposure on gaze behavior in 2-year-old children in the largest dioxin-contaminated area in Vietnam. Sci Rep 2023; 13:20679. [PMID: 38001134 PMCID: PMC10673870 DOI: 10.1038/s41598-023-47893-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 11/20/2023] [Indexed: 11/26/2023] Open
Abstract
Fifty-five children aged 2 years from a birth cohort in the largest dioxin-contaminated area in Bien Hoa city, Vietnam participated in this survey to examine gaze behavior. Exposure levels were indicated by 2,3,7,8-tetrachlorodibenzo-p-dibenzodioxin (TCDD) and toxic equivalent of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (TEQ-PCDD/Fs) levels in maternal breast milk. The percentage of the total fixation duration on the face (% Face), mouth (% Mouth), and eye areas (% Eyes) when viewing silent and conversation scenes was used as gaze behavior indices. When they reached 3-year-old, autistic behavior was assessed using the Autism Spectrum Rating Scale (ASRS). A general linear model adjusted for confounding factors was used to compare gaze indices and ASRS scores between high and low dioxin exposure groups. Effects of perinatal dioxin exposure on gaze behavior were found only when viewing conversation scenes indicated by lower % Face for boys in high TCDD exposure group and lower % Eyes for girls in high TEQ-PCDD/Fs group. Increased autistic traits showed by higher ASRS scores at 3-year-old were found in both gender in the high TCDD exposure group. These findings indicate that perinatal TCDD and TEQ-PCDD/Fs exposure may reduce gaze behavior in 2-year-old children, predicting increased autistic traits at 3-year-old.
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Affiliation(s)
- Pham Ngoc Thao
- Department of Functional Diagnosis, 103 Military Hospital, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, 12108, Ha Noi, Vietnam.
- Department of Functional Diagnosis, 103 Military Hospital, Vietnam Military Medical University, 261 Phung Hung Street, Phuc La Commune, Ha Dong District, Ha Noi, Vietnam.
| | - Muneko Nishijo
- Department of Epidemiology and Public Health, Kanazawa Medical University, Ishikawa, 920-0293, Japan
| | - Pham The Tai
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 12108, Ha Noi, Vietnam
| | - Tran Ngoc Nghi
- Ministry of Health, Vietnamese Government, Hanoi, Vietnam
| | - Vu Thi Hoa
- Department of Epidemiology and Public Health, Kanazawa Medical University, Ishikawa, 920-0293, Japan
| | - Tran Hai Anh
- Department of Physiology, Vietnam Military Medical University, 12108, Ha Noi, Vietnam
| | - Tran Viet Tien
- Department of Tropical and Infectious diseases, 103 Military Hospital, Vietnam Military Medical University, 12108, Ha Noi, Vietnam
| | - Yoshikazu Nishino
- Department of Epidemiology and Public Health, Kanazawa Medical University, Ishikawa, 920-0293, Japan
| | - Hisao Nishijo
- Department of Sport and Health Sciences, Faculty of Human Sciences, University of East Asia, Shimonoseki-Shi, Yamaguchi, 751-8503, Japan
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Vu HT, Pham TN, Nishijo M, Yokawa T, Pham The T, Takiguchi T, Nishino Y, Nishijo H. Impact of dioxin exposure on brain morphometry and social anxiety in men living in the most dioxin-contaminated area in Vietnam. J Psychiatr Res 2023; 166:169-177. [PMID: 37774667 DOI: 10.1016/j.jpsychires.2023.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 06/16/2023] [Accepted: 09/13/2023] [Indexed: 10/01/2023]
Abstract
BACKGROUND Previously, we reported that the global brain volume was significantly higher in men with estimated perinatal dioxin exposure in Vietnam. In this study, we aimed to clarify which brain lobes, consisting of several gyri, contributed to the increased global brain volume. We then analyzed associations between changes in brain volume and social anxiety symptoms to investigate the role of structural changes of the brain on social anxiety following perinatal dioxin exposure. METHODS Thirty-three men living near the dioxin-contaminated Bien Hoa airbase, underwent MRI examination. The regional gray matter volumes were extracted using the SPM12 in a MATLAB environment, and compared between subgroups with and without perinatal dioxin exposure estimated from their maternal residency in Bien Hoa during pregnancy. The social anxiety questionnaire for adults (SAQ-A30) was used to assess social anxiety. RESULTS In both hemispheres, higher gray matter volume in the frontal and temporal lobes, particularly in the superior frontal gyrus, superior temporal gyrus, and temporal pole were found in men with perinatal dioxin exposure. Superior temporal gyrus volume was significantly higher in men with perinatal exposure also after adjusting for reduction of its volume associated with increasing 1,2,3,7,8-PentaCDD levels in blood. Increased volume of these gyri, which showed higher volume in men with perinatal exposure, was associated with increased SAQ-A30 scores. CONCLUSION Perinatal dioxin exposure may increase the brain volume of gyri involved in social behavior, which was associated with increased social anxiety symptoms, suggesting functional effects accompanied the morphological effects of dioxin exposure.
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Affiliation(s)
- Hoa Thi Vu
- Department of Public Health, Kanazawa Medical University, Japan; Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Hanoi, Viet Nam
| | - Thao Ngoc Pham
- Department of Functional Diagnosis, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Viet Nam
| | - Muneko Nishijo
- Department of Public Health, Kanazawa Medical University, Japan.
| | | | - Tai Pham The
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Hanoi, Viet Nam
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Ho HT, Bui CL, Santin O, Nguyen HT, Thi Nguyen HL, Do HC, Tran NN, Tran HTT, Nguyen AM, Carter G, Bui HTT, Van Hoang M. Information needs of informal caregivers in caring and rehabilitation for dioxin victims in Vietnam. BMC Public Health 2023; 23:1412. [PMID: 37488595 PMCID: PMC10364352 DOI: 10.1186/s12889-023-15095-y] [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: 06/04/2022] [Accepted: 01/19/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND Health outcomes among Agent Orange/dioxin (dioxin) victims are significant due to many individuals requiring daily assistance, informal care, and rehabilitation support. This study aimed to identify the information needs of informal caregivers of dioxin victims in Vietnam. METHODS A cross-sectional study was conducted in Quynh Phu district, Thai Binh province - an area with a large number of dioxin victims, from June 2019 to June 2020. Quantitative data were collected from 124 caregivers of victims via structured interviews. Qualitative data were collected using semi-structured interview guides with in-depth interviews (IDI) (n = 36) and two focus group discussions (FGD) (n = 12). RESULTS The results demonstrated that all caregivers of dioxin victims were family members, predominantly older (71.8%), 61.5 years old on average, living on low incomes (87.9%), and were farmers (80.7%). Almost all participants (96.8%) reported having information needs, particularly concerning dioxin's harms, nutrition, dioxin-related policies and rehabilitation, and psychological support for patients. Caregivers reported that they would like to receive information via health staff counselling (85.0%), television (75.0%), and community loudspeaker (65.8%). Notably, the majority of caregivers reported the need for information regarding psychological support (70.0%). These findings are consistent with qualitative data, which identify an urgent need to provide information, especially through health staff and digital resources. CONCLUSION Many families with dioxin victims lived with little support and information, highlighting their high demand for information about care and rehabilitation. Thus, the healthcare system should promote information support, policy, and psychological support for caregivers and victims. An online support system for caregivers and victims is also recommended.
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Affiliation(s)
- Hien Thi Ho
- Faculty of Health and Medical Sciences, the University of Adelaide, Adelaide, South Australia, Australia
- School of Nursing & Midwifery, Faculty of Medicine, Health & Life Sciences, Queen's University Belfast, 97 Lisburn Road, Belfast, UK
| | - Chi Linh Bui
- Faculty of Clinical Medicine, Hanoi University of Public Health, 1A Duc Thang, Hanoi, Vietnam.
| | - Olinda Santin
- School of Nursing & Midwifery, Faculty of Medicine, Health & Life Sciences, Queen's University Belfast, 97 Lisburn Road, Belfast, UK
| | - Huong Thi Nguyen
- Faculty of Clinical Medicine, Hanoi University of Public Health, 1A Duc Thang, Hanoi, Vietnam
| | - Hien Luong Thi Nguyen
- Faculty of Clinical Medicine, Hanoi University of Public Health, 1A Duc Thang, Hanoi, Vietnam
| | - Hung Chi Do
- Faculty of Clinical Medicine, Hanoi University of Public Health, 1A Duc Thang, Hanoi, Vietnam
- E Central Hospital, 89 Tran Cung st, Hanoi, Vietnam
| | - Nghi Ngoc Tran
- Medical Services Administration Department, Ministry of Health, Hanoi, Vietnam
| | | | - Anh Mai Nguyen
- Faculty of Clinical Medicine, Hanoi University of Public Health, 1A Duc Thang, Hanoi, Vietnam
| | - Gillian Carter
- School of Nursing & Midwifery, Faculty of Medicine, Health & Life Sciences, Queen's University Belfast, 97 Lisburn Road, Belfast, UK
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Tran NN, Pham-The T, Pham TN, Vu HT, Luong KN, Nishijo M. Neurodevelopmental Effects of Perinatal TCDD Exposure Differ from Those of Other PCDD/Fs in Vietnamese Children Living near the Former US Air Base in Da Nang, Vietnam. TOXICS 2023; 11:103. [PMID: 36850978 PMCID: PMC9961255 DOI: 10.3390/toxics11020103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
This study reports that children exposed to 2,3,7,8-tetra-chlorodibenzo-p-dioxin (TCDD), the major toxin in Agent Orange, from the breast milk of mothers residing near the former Da Nang US air base in Vietnam may have specific alterations in higher brain functions, resulting in social and communication deficits, including autism spectrum disorder (ASD). After the age of 8 years, girls with high TCDD showed increased attention deficit hyperactivity disorder (ADHD)-like behaviors and altered mirror neuron activity, which is often observed in children with ASD. However, no significant relationship between autistic traits and toxic equivalency values of polychlorinated dibenzodioxins and polychlorinated dibenzofurans (TEQ-PCDD/Fs) was found in these children. Notably, boys with high levels of TEQ-PCDD/Fs showed poor language and motor development in the first 3 years of life, although boys with high TCDD levels did not. However, at 8 years of age, boys with high TCDD showed reading learning difficulties, a neurodevelopmental disorder. These findings suggest that perinatal TCDD exposure impacts social-emotional cognitive functions, leading to sex-specific neurodevelopmental disorders-learning difficulty in boys and ADHD in girls. Future studies with a greater number of children exposed to high levels of TCDD are necessary to estimate the threshold values for neurodevelopmental effects.
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Affiliation(s)
- Nghi Ngoc Tran
- Ministry of Health, Vietnam Government, Hanoi 10000, Vietnam
| | - Tai Pham-The
- Faculty of Medicine, Vietnam Military Medical University, Hanoi 10000, Vietnam
| | - Thao Ngoc Pham
- Faculty of Medicine, Vietnam Military Medical University, Hanoi 10000, Vietnam
| | - Hoa Thi Vu
- Department of Public Health, Kanazawa Medial University, Uchinada 252-0815, Ishikawa, Japan
| | - Khue Ngoc Luong
- Ministry of Health, Vietnam Government, Hanoi 10000, Vietnam
| | - Muneko Nishijo
- Department of Public Health, Kanazawa Medial University, Uchinada 252-0815, Ishikawa, Japan
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Trang TB, Tai PT, Nishijo M, Anh TN, Thao PN, Hoa VT, Nghi TN, Van Luong H, Nishijo H. Adverse effects of dioxins on cognitive ability and motor performance of 5-year-old children residing in a hotspot of dioxin contamination originating from Agent Orange in Vietnam: A prospective cohort study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 833:155138. [PMID: 35405238 DOI: 10.1016/j.scitotenv.2022.155138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 04/03/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
Bien Hoa airbase is the most dioxin-polluted hotspot in Vietnam. In 2012, a birth cohort living around Bien Hoa airbase was recruited for assessment of physical and neurological development. In the present study, neurodevelopment scores at 5 years of age were assessed by the Kaufman Assessment Battery for Children, Second Edition and the Movement Assessment Battery for Children, Second Edition for 185 children in Bien Hoa and 104 children in Ha Dong (unexposed control group) to clarify the effects of dioxin. 2,3,7,8-tetrachlorodibenzo-p-dioxin concentrations in breast milk of women in Bien Hoa were approximately three times higher than those of women in Ha Dong (2.33 vs. 0.69 pg/g fat, p < 0.001). In general, neurodevelopment scores were lower in Bien Hoa children than in Ha Dong children. In boys, scores differed for number recall (12.6 vs. 14.0, p = 0.036), triangles (10.7 vs. 12.4, p = 0.005), manual dexterity (8.3 vs. 9.7, p = 0.037), balance (7.4 vs. 10.3, p < 0.001), and total movement scores (8.0 vs. 10.1, p = 0.003). After adjusting for covariates, linear regression analysis indicated that the scores of the triangles, balance, and total movement tests were inversely associated with levels of 2,3,7,8-tetrachlorodibenzo-p-dioxin and of toxic equivalency of polychlorinated dibenzodioxins and polychlorinated dibenzofurans. In girls, scores differed for the triangles test (11.0 vs. 12.6, p = 0.005), hand movement test (9.6 vs. 11.3, p = 0.003), and balance test (9.1 vs. 10.7, p = 0.050); toxic equivalency of polychlorinated dibenzofurans was inversely associated with hand movement and balance scores. Overall, perinatal dioxin exposure appears to have a long-term impact on neurodevelopment.
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Affiliation(s)
- Thieu Ban Trang
- Department of Anatomy, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Pham The Tai
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 222-Phung Hung, Ha Dong, Ha Noi, Viet Nam.
| | - Muneko Nishijo
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan.
| | - Tran Ngoc Anh
- Department of Anatomy, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Pham Ngoc Thao
- Military Hospital 103, Vietnam Military Medical University, 261-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Vu Thi Hoa
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan
| | - Tran Ngoc Nghi
- Ministry of Health, 138 A-Giang Vo, Kim Ma, Ba Dinh, Ha Noi, Viet Nam
| | - Hoang Van Luong
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 222-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Japan
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Pham-The T, Nishijo M, Pham TN, Vu HT, Tran NN, Tran AH, Hoang LV, Do Q, Nishino Y, Nishijo H. Perinatal Dioxin Exposure and Attention Deficit Hyperactivity Disorder (ADHD) Symptoms in Children Living in a Dioxin Contamination Hotspot in Vietnam. TOXICS 2022; 10:toxics10050212. [PMID: 35622626 PMCID: PMC9143824 DOI: 10.3390/toxics10050212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/26/2022] [Accepted: 04/01/2022] [Indexed: 01/27/2023]
Abstract
We examined children in Da Nang, a dioxin contamination hotspot in Vietnam, twice at 5 and 8 years of age, and investigated sex- and age-dependent differences in the effects of dioxin exposure on attention deficit hyperactivity disorder (ADHD) symptoms. We also studied autistic traits in children with ADHD symptoms. A total of 163 children participated in follow-up surveys at 5 and 8 years of age and were included in the present analysis. ADHD symptoms were assessed using an ADHD rating scale with inattention and hyperactivity-and-impulsivity (hyperactivity) subscales. Autistic behaviors were evaluated using the Autism Spectrum Rating Scale (ASRS). Perinatal dioxin exposure was indicated by dioxin levels in maternal breast milk. In boys, hyperactivity scores were significantly higher in the high 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) group only at 5 years of age. In girls, hyperactivity scores at 8 years of age were significantly higher in the high TCDD group, which was significantly associated with those at 5 years of age. In girls, ASRS unusual behavior scores were significantly higher with higher TCDD exposure and hyperactivity scores at 8 years of age. These results suggest that high perinatal TCDD exposure may increase ADHD likelihood and autistic traits, particularly in girls of 7–8 years of age.
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Affiliation(s)
- Tai Pham-The
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, Hanoi 12108, Vietnam; (T.N.P.); (A.H.T.); (L.V.H.); (Q.D.)
- Correspondence: ; Tel.: +84-339078560
| | - Muneko Nishijo
- Department of Public Health, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan; (M.N.); (H.T.V.); (Y.N.)
| | - Thao Ngoc Pham
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, Hanoi 12108, Vietnam; (T.N.P.); (A.H.T.); (L.V.H.); (Q.D.)
| | - Hoa Thi Vu
- Department of Public Health, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan; (M.N.); (H.T.V.); (Y.N.)
| | - Nghi Ngoc Tran
- Ministry of Health, Vietnamese Government, Hanoi 10060, Vietnam;
| | - Anh Hai Tran
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, Hanoi 12108, Vietnam; (T.N.P.); (A.H.T.); (L.V.H.); (Q.D.)
| | - Luong Van Hoang
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, Hanoi 12108, Vietnam; (T.N.P.); (A.H.T.); (L.V.H.); (Q.D.)
| | - Quyet Do
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, Hanoi 12108, Vietnam; (T.N.P.); (A.H.T.); (L.V.H.); (Q.D.)
| | - Yoshikazu Nishino
- Department of Public Health, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan; (M.N.); (H.T.V.); (Y.N.)
| | - Hisao Nishijo
- Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan;
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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.
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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;
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Effect of Perinatal Dioxin Exposure Originating from Agent Orange on Gaze Behavior in 3-Year-Old Children Living in the Most Dioxin-Contaminated Areas in Vietnam. TOXICS 2022; 10:toxics10040150. [PMID: 35448411 PMCID: PMC9032459 DOI: 10.3390/toxics10040150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/14/2022] [Accepted: 03/19/2022] [Indexed: 11/17/2022]
Abstract
We investigated the effect of perinatal dioxin exposure indicated by dioxins in breast milk on children’s gaze behavior. We studied 142 children aged 3 years from the 2012 Bien Hoa birth cohort in a hotspot of dioxin contamination in Vietnam. Children’s faces were viewed using the eye-tracking method. Associations between gaze behavior of faces and neurodevelopmental indices and head circumference were analyzed to determine whether poor gaze behavior indicates increased autistic traits in these children. The gaze fixation duration on facial areas when viewing 10 still images of children was calculated as the gaze behavior index. Autistic behavior was assessed using the Autism Spectrum Rating Scale, and language development was evaluated by the Bayley Scales of Infant and Toddler Development, Ver. 3. The face fixation duration (%) significantly decreased as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) concentrations increased in a dose−effect manner in girls, which suggested atypical gaze behavior for watching human faces. Furthermore, these girls with atypical gaze behavior showed lower social communication scores and smaller head sizes, suggesting increased autistic traits in girls. In conclusion, our findings show sex-specific effects (girls > boys) of perinatal TCDD exposure on gaze behavior in young children.
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Gang N, Van Allen K, Villeneuve PJ, MacDonald H, Bruin JE. Sex-specific Associations Between Type 2 Diabetes Incidence and Exposure to Dioxin and Dioxin-like Pollutants: A Meta-analysis. FRONTIERS IN TOXICOLOGY 2022; 3:685840. [PMID: 35295132 PMCID: PMC8915902 DOI: 10.3389/ftox.2021.685840] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 12/14/2021] [Indexed: 01/09/2023] Open
Abstract
The potential for persistent organic pollutants (POPs), including dioxins and dioxin-like polychlorinated biphenyls (DL-PCBs), to increase the risk of incident diabetes in adults has been extensively studied. However, there is substantial variability in the reported associations both between and within studies. Emerging data from rodent studies suggest that dioxin disrupts glucose homeostasis in a sex-specific manner. Thus, we performed a review and meta-analysis of relevant epidemiological studies to investigate sex differences in associations between dioxin or DL-PCB exposure and type 2 diabetes incidence. Articles that met our selection criteria (n = 81) were organized into the following subcategories: data stratified by sex (n = 13), unstratified data (n = 45), and data from only 1 sex (n = 13 male, n = 10 female). We also considered whether exposure occurred either abruptly at high concentrations through a contamination event (“disaster exposure”) or chronically at low concentrations (“non-disaster exposure”). There were 8 studies that compared associations between dioxin/DL-PCB exposure and diabetes risk in males versus females within the same population. When all sex-stratified or single-sex studies were considered in the meta-analysis (n = 18), the summary relative risk (RR) for incident diabetes among those exposed relative to reference populations was 1.78 (95% CI = 1.37–2.31) and 1.95 (95% CI = 1.56–2.43) for female and males, respectively. However, when we restricted the meta-analysis to disaster-exposed populations, the RR was higher in females than males (2.86 versus 1.59, respectively). In contrast, in non-disaster exposed populations the RR for females was lower than males (1.40 and 2.02, respectively). Our meta-analysis suggests that there are sex differences in the associations between dioxin/DL-PCBs exposure and incident diabetes, and that the mode of exposure modifies these differences.
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Affiliation(s)
- Noa Gang
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, ON, Canada
| | - Kyle Van Allen
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, ON, Canada
| | - Paul J. Villeneuve
- School of Mathematics and Statistics, Carleton University, Ottawa, ON, Canada
- Department of Public Health Sciences, Queen’s University, Kingston, ON, Canada
| | - Heather MacDonald
- Health and Biosciences Librarian, MacOdrum Library, Carleton University, Ottawa, ON, Canada
| | - Jennifer E. Bruin
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, ON, Canada
- *Correspondence: Jennifer E. Bruin,
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Pistollato F, Carpi D, Mendoza-de Gyves E, Paini A, Bopp SK, Worth A, Bal-Price A. Combining in vitro assays and mathematical modelling to study developmental neurotoxicity induced by chemical mixtures. Reprod Toxicol 2021; 105:101-119. [PMID: 34455033 PMCID: PMC8522961 DOI: 10.1016/j.reprotox.2021.08.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/30/2021] [Accepted: 08/24/2021] [Indexed: 12/12/2022]
Abstract
Prenatal and postnatal co-exposure to multiple chemicals at the same time may have deleterious effects on the developing nervous system. We previously showed that chemicals acting through similar mode of action (MoA) and grouped based on perturbation of brain derived neurotrophic factor (BDNF), induced greater neurotoxic effects on human induced pluripotent stem cell (hiPSC)-derived neurons and astrocytes compared to chemicals with dissimilar MoA. Here we assessed the effects of repeated dose (14 days) treatments with mixtures containing the six chemicals tested in our previous study (Bisphenol A, Chlorpyrifos, Lead(II) chloride, Methylmercury chloride, PCB138 and Valproic acid) along with 2,2'4,4'-tetrabromodiphenyl ether (BDE47), Ethanol, Vinclozolin and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)), on hiPSC-derived neural stem cells undergoing differentiation toward mixed neurons/astrocytes up to 21 days. Similar MoA chemicals in mixtures caused an increase of BDNF levels and neurite outgrowth, and a decrease of synapse formation, which led to inhibition of electrical activity. Perturbations of these endpoints are described as common key events in adverse outcome pathways (AOPs) specific for DNT. When compared with mixtures tested in our previous study, adding similarly acting chemicals (BDE47 and EtOH) to the mixture resulted in a stronger downregulation of synapses. A synergistic effect on some synaptogenesis-related features (PSD95 in particular) was hypothesized upon treatment with tested mixtures, as indicated by mathematical modelling. Our findings confirm that the use of human iPSC-derived mixed neuronal/glial models applied to a battery of in vitro assays anchored to key events in DNT AOP networks, combined with mathematical modelling, is a suitable testing strategy to assess in vitro DNT induced by chemical mixtures.
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Affiliation(s)
| | - Donatella Carpi
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | | | - Alicia Paini
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | | | - Andrew Worth
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Anna Bal-Price
- European Commission, Joint Research Centre (JRC), Ispra, Italy.
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11
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Perinatal effects of persistent organic pollutants on thyroid hormone concentration in placenta and breastmilk. Mol Aspects Med 2021; 87:100988. [PMID: 34238594 DOI: 10.1016/j.mam.2021.100988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 04/30/2021] [Accepted: 06/08/2021] [Indexed: 12/18/2022]
Abstract
Thyroid hormones (TH) are known to play a critical role in regulating many biological processes including growth and development, energy homeostasis, thermogenesis, lipolysis and metabolism of cholesterol. Severe TH deficiency especially during fetal development results in cretinism, but can also lead to an imbalance in metabolism with, among others, an alteration in body weight composition. Over the past two decades, increasing evidence has shown that certain persistent organic pollutants (POP) can interfere with the endocrine system. These POP referred to as "endocrine disrupting chemicals" are widely present in the environment and populations are exposed globally. Moreover, epidemiological studies have shown that a particularly sensitive period is the pre- and postnatal time. Indeed, perinatal exposure to such chemicals could lead to the onset diseases in later life. It is known, that, maternal thyroid hormones are transported by the placenta to the fetus from 6 weeks of gestation and it seems that during the first trimester, and part of the second, the fetus is entirely dependent on maternal TH supply for its development. Interferences in the TH-network as a consequence of the exposure to such pollutants could cause variations in TH concentration. Only small changes in maternal thyroid hormone levels in early stages of pregnancy can influence fetal neurological and cardiovascular development, as well as according to recent studies, have effect on childhood body composition. With this review, we will report the most recent and important studies concerning the association between thyroid hormone concentration and POP levels measured during the perinatal period. We will mostly focus on the data recently reported on placenta and breastmilk as main sources for understanding the potential consequences of exposure. The possible link between exposure to pollutants, TH dysregulation and possible adverse outcome will also be briefly discussed. From our literature search, several studies support the hypothesis that pre- and postnatal exposure to different pollutants might play a role in causing variation in thyroid hormone concentration. However, few research papers have so far studied the relationship linking exposure to pollutants, TH concentration and possible health consequences. Therefore, this review highlights the need for further research in this direction.
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12
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Gileadi TE, Swamy AK, Hore Z, Horswell S, Ellegood J, Mohan C, Mizuno K, Lundebye AK, Giese KP, Stockinger B, Hogstrand C, Lerch JP, Fernandes C, Basson MA. Effects of Low-Dose Gestational TCDD Exposure on Behavior and on Hippocampal Neuron Morphology and Gene Expression in Mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2021; 129:57002. [PMID: 33956508 PMCID: PMC8101924 DOI: 10.1289/ehp7352] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 02/19/2021] [Accepted: 03/29/2021] [Indexed: 05/03/2023]
Abstract
BACKGROUND 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is a persistent and toxic environmental pollutant. Gestational exposure to TCDD has been linked to cognitive and motor deficits, and increased incidence of autism spectrum disorder (ASD) traits in children. Most animal studies of these neurodevelopmental effects involve acute TCDD exposure, which does not model typical exposure in humans. OBJECTIVES The aim of the study was to establish a dietary low-dose gestational TCDD exposure protocol and performed an initial characterization of the effects on offspring behavior, neurodevelopmental phenotypes, and gene expression. METHODS Throughout gestation, pregnant C57BL/6J mice were fed a diet containing a low dose of TCDD (9 ng TCDD/kg body weight per day) or a control diet. The offspring were tested in a battery of behavioral tests, and structural brain alterations were investigated by magnetic resonance imaging. The dendritic morphology of pyramidal neurons in the hippocampal Cornu Ammonis (CA)1 area was analyzed. RNA sequencing was performed on hippocampi of postnatal day 14 TCDD-exposed and control offspring. RESULTS TCDD-exposed females displayed subtle deficits in motor coordination and reversal learning. Volumetric difference between diet groups were observed in regions of the hippocampal formation, mammillary bodies, and cerebellum, alongside higher dendritic arborization of pyramidal neurons in the hippocampal CA1 region of TCDD-exposed females. RNA-seq analysis identified 405 differentially expressed genes in the hippocampus, enriched for genes with functions in regulation of microtubules, axon guidance, extracellular matrix, and genes regulated by SMAD3. DISCUSSION Exposure to 9 ng TCDD/kg body weight per day throughout gestation was sufficient to cause specific behavioral and structural brain phenotypes in offspring. Our data suggest that alterations in SMAD3-regulated microtubule polymerization in the developing postnatal hippocampus may lead to an abnormal morphology of neuronal dendrites that persists into adulthood. These findings show that environmental low-dose gestational exposure to TCDD can have significant, long-term impacts on brain development and function. https://doi.org/10.1289/EHP7352.
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Affiliation(s)
- Talia E. Gileadi
- Centre for Craniofacial and Regenerative Biology, King’s College London, London, UK
| | - Abhyuday K. Swamy
- Centre for Craniofacial and Regenerative Biology, King’s College London, London, UK
| | - Zoe Hore
- Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
| | - Stuart Horswell
- Department of Bioinformatics and Biostatistics, The Francis Crick Institute, London, UK
| | - Jacob Ellegood
- Mouse Imaging Centre (MICe), Hospital for Sick Children, Toronto, Ontario, Canada
| | - Conor Mohan
- Centre for Craniofacial and Regenerative Biology, King’s College London, London, UK
| | - Keiko Mizuno
- Department of Basic and Clinical Neuroscience, King’s College London, London, UK
| | | | - K. Peter Giese
- Department of Basic and Clinical Neuroscience, King’s College London, London, UK
| | | | | | - Jason P. Lerch
- Mouse Imaging Centre (MICe), Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
- Wellcome Centre for Integrative Neuroimaging, University of Oxford, Oxford, UK
| | - Cathy Fernandes
- Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
- MRC Centre for Neurodevelopmental Disorders, King’s College London, London, UK
| | - M. Albert Basson
- Centre for Craniofacial and Regenerative Biology, King’s College London, London, UK
- MRC Centre for Neurodevelopmental Disorders, King’s College London, London, UK
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Nishijo M, Pham TT, Pham NT, Duong HTT, Tran NN, Kondoh T, Nishino Y, Nishimaru H, Do QB, Nishijo H. Nutritional Intervention with Dried Bonito Broth for the Amelioration of Aggressive Behaviors in Children with Prenatal Exposure to Dioxins in Vietnam: A Pilot Study. Nutrients 2021; 13:nu13051455. [PMID: 33922941 PMCID: PMC8145378 DOI: 10.3390/nu13051455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 12/04/2022] Open
Abstract
Dioxins have been suggested to induce inflammation in the intestine and brain and to induce neurodevelopmental disorders such as autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD), partly due to deficits in parvalbumin-positive neurons in the brain that are sensitive to inflammatory stress. Previously, we reported ADHD traits with increased aggressiveness in children with prenatal exposure to dioxins in Vietnam, whereas dried bonito broth (DBB) has been reported to suppress inflammation and inhibit aggressive behavior in animal and human studies. In the present study, we investigated the association between dioxin exposure and the prevalence of children with highly aggressive behaviors (Study 1), as well as the effects of DBB on the prevalence of children with highly aggressive behaviors (Study 2). Methods: In Study 1, we investigated the effects of dioxin exposure on the prevalence of children with high aggression scores, which were assessed using the Children’s Scale of Hostility and Aggression: Reactive/Proactive (C-SHARP) in dioxin-contaminated areas. The data were analyzed using a logistic regression model after adjusting for confounding factors. In Study 2, we performed nutritional intervention by administering DBB for 60 days to ameliorate the aggressiveness of children with high scores on the C-SHARP aggression scale. The effects of DBB were assessed by comparing the prevalence of children with high C-SHARP scores between the pre- and post-intervention examinations. Results: In Study 1, only the prevalence of children with high covert aggression was significantly increased with an increase in dioxin exposure. In Study 2, in the full ingestion (>80% of goal ingestion volume) group, the prevalence of children with high covert aggression associated with dioxin exposure was significantly lower in the post-ingestion examination compared with in the pre-ingestion examination. However, in other ingestion (<20% and 20–79%) groups and a reference (no intervention) group, no difference in the prevalence of children with high covert aggression was found between the examinations before and after the same experimental period. Conclusions: The findings suggest that DBB ingestion may ameliorate children’s aggressive behavior, which is associated with perinatal dioxin exposure.
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Affiliation(s)
- Muneko Nishijo
- Department of Public Health, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan; (M.N.); (Y.N.)
| | - Tai The Pham
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Hanoi 193824, Vietnam; (T.T.P.); (N.T.P.); (Q.B.D.)
| | - Ngoc Thao Pham
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Hanoi 193824, Vietnam; (T.T.P.); (N.T.P.); (Q.B.D.)
| | | | - Ngoc Nghi Tran
- Ministry of Health, Vietnam Government, Hanoi 111000, Vietnam;
| | - Takashi Kondoh
- Department of Food Science and Nutrition, Faculty of Agriculture, Kindai University, Nara 631-8505, Japan;
| | - Yoshikazu Nishino
- Department of Public Health, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan; (M.N.); (Y.N.)
| | - Hiroshi Nishimaru
- System Emotional Science, Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan;
| | - Quyet Ba Do
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Hanoi 193824, Vietnam; (T.T.P.); (N.T.P.); (Q.B.D.)
| | - Hisao Nishijo
- System Emotional Science, Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan;
- Correspondence: ; Tel.: +81-764347215
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14
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Van Manh P, Tai PT, Phuong NM, Nishijo M, Trung DM, Thao PN, Son HA, Van Tuan T, Van Chuyen N, Van Long N, Van Khoi N, Linh NT, Van Luong H, Quyet DB. Serum dioxin concentrations in military workers at three dioxin-contaminated airbases in Vietnam. CHEMOSPHERE 2021; 266:129024. [PMID: 33272665 DOI: 10.1016/j.chemosphere.2020.129024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 10/15/2020] [Accepted: 11/14/2020] [Indexed: 06/12/2023]
Abstract
An estimated 91,998,400 L of herbicides were stocked at three US airbases in Vietnam between 1962 and 1971. These herbicides were contaminated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-tetraCDD). In 2017, we sampled blood from 120 male Vietnamese military workers in the three dioxin-contaminated airbases (Bien Hoa, Da Nang, and Phu Cat) and from 20 workers at an uncontaminated airbase. 2,3,7,8-tetraCDD concentrations were highest in samples from Bien Hoa (18.2 pg/g lipid), followed by samples from Da Nang (9.2 pg/g lipid), Phu Cat (3.7 pg/g lipid), and the reference base (2.1 pg/g lipid). In Bien Hoa, 31 of the 50 subjects had blood 2,3,7,8-tetraCDD levels in the range of 10-100 pg/g lipid and four subjects had 2,3,7,8-tetraCDD levels that exceeded 100 pg/g lipid. In Da Nang, almost half of the subjects had blood 2,3,7,8-tetraCDD concentrations in the range of 10-100 pg/g lipid. These findings suggest that military workers at contaminated bases are the population most vulnerable to dioxin exposure, especially at Bien Hoa.
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Affiliation(s)
- Phan Van Manh
- Department of Occupational Medicine, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Pham The Tai
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam.
| | - Nguyen Minh Phuong
- Department of Occupational Medicine, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Muneko Nishijo
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Do Minh Trung
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Pham Ngoc Thao
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam; Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Ho Anh Son
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Tran Van Tuan
- Department of Military Hygiene, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Nguyen Van Chuyen
- Department of Military Hygiene, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Nguyen Van Long
- Department of Military Science, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Nguyen Van Khoi
- Department of Military Science, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Nguyen Tung Linh
- Department of Military Science, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Hoang Van Luong
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Do Ba Quyet
- Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi, Viet Nam
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15
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Pham TN, Nishijo M, Pham TT, Vu HT, Tran NN, Tran AH, Do Q, Takiguchi T, Nishino Y, Nishijo H. Dioxin exposure and sexual dimorphism of gaze behavior in prepubertal Vietnamese children living in Da Nang, a hot spot for dioxin contamination. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 749:141083. [PMID: 32829268 DOI: 10.1016/j.scitotenv.2020.141083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 07/17/2020] [Accepted: 07/17/2020] [Indexed: 06/11/2023]
Abstract
Previous studies have reported that dioxin exposure alters sexual dimorphism of play behavior in pre-pubertal children. We aimed to investigate the effects of perinatal dioxin exposure, indicated by dioxins in breast milk, on sexual dimorphism of gaze behavior after adjusting for salivary testosterone (T). Participants were pre-pubertal children in a hot spot for dioxin contamination originating from herbicide spraying in Vietnam. We used eye tracking to assess gaze behavior in 172 children (100 boys and 72 girls) aged 8-9 years. Two sets of 15 pairs of pictures, one oriented towards boys and one oriented towards girls, containing 5 pairs of toy photos (non-biological stimuli) and 10 pairs of human line drawings (biological stimuli) were shown to all children. The total fixation duration for each picture was extracted using Tobii studio software and a feminine index of gaze behavior was defined as the ratio of the summed fixation duration for the girl- vs boy-oriented versions of each stimuli. When viewing non-biological stimuli, feminine index scores significantly increased with TCDD (β = 0.294) in girls only. For biological stimuli, however, feminine index scores significantly increased with TEQ-PCDD/Fs (β = 0.269) in boys and with TCDD in girls (β = 0.286). These associations were significant even after adjusting for salivary T levels, which were inversely associated with some dioxin congeners in girls. In addition, increased feminine index scores for biological stimuli were associated with lower cognitive scores for hand-movement and word-order tests in boys and for face-recognition tests in girls examined at 5 years of age. In conclusion, these results suggest that perinatal dioxin exposure may increase visual interest in girl-oriented objects through impairment of cognitive abilities in pre-pubertal Vietnamese children. PCDD congeners were associated with gaze behavior independently of T levels in boys, while this was only the case for TCDD levels in girls.
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Affiliation(s)
- Thao Ngoc Pham
- Department of Public Health, Kanazawa Medical University, Japan; Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | - Muneko Nishijo
- Department of Public Health, Kanazawa Medical University, Japan.
| | - Tai The Pham
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | - Hoa Thi Vu
- Department of Public Health, Kanazawa Medical University, Japan
| | | | - Anh Hai Tran
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | - Quyet Do
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | | | | | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine, University of Toyama, Japan
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16
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Dai Q, Xu X, Eskenazi B, Asante KA, Chen A, Fobil J, Bergman Å, Brennan L, Sly PD, Nnorom IC, Pascale A, Wang Q, Zeng EY, Zeng Z, Landrigan PJ, Bruné Drisse MN, Huo X. Severe dioxin-like compound (DLC) contamination in e-waste recycling areas: An under-recognized threat to local health. ENVIRONMENT INTERNATIONAL 2020; 139:105731. [PMID: 32315892 DOI: 10.1016/j.envint.2020.105731] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 02/05/2023]
Abstract
Electrical and electronic waste (e-waste) burning and recycling activities have become one of the main emission sources of dioxin-like compounds (DLCs). Workers involved in e-waste recycling operations and residents living near e-waste recycling sites (EWRS) are exposed to high levels of DLCs. Epidemiological and experimental in vivo studies have reported a range of interconnected responses in multiple systems with DLC exposure. However, due to the compositional complexity of DLCs and difficulties in assessing mixture effects of the complex mixture of e-waste-related contaminants, there are few studies concerning human health outcomes related to DLC exposure at informal EWRS. In this paper, we have reviewed the environmental levels and body burdens of DLCs at EWRS and compared them with the levels reported to be associated with observable adverse effects to assess the health risks of DLC exposure at EWRS. In general, DLC concentrations at EWRS of many countries have been decreasing in recent years due to stricter regulations on e-waste recycling activities, but the contamination status is still severe. Comparison with available data from industrial sites and well-known highly DLC contaminated areas shows that high levels of DLCs derived from crude e-waste recycling processes lead to elevated body burdens. The DLC levels in human blood and breast milk at EWRS are higher than those reported in some epidemiological studies that are related to various health impacts. The estimated total daily intakes of DLCs for people in EWRS far exceed the WHO recommended total daily intake limit. It can be inferred that people living in EWRS with high DLC contamination have higher health risks. Therefore, more well-designed epidemiological studies are urgently needed to focus on the health effects of DLC pollution in EWRS. Continuous monitoring of the temporal trends of DLC levels in EWRS after actions is of highest importance.
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Affiliation(s)
- Qingyuan Dai
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, China
| | - Xijin Xu
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, China
| | - Brenda Eskenazi
- School of Public Health, University of California, Berkeley, USA
| | | | - Aimin Chen
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, USA
| | - Julius Fobil
- School of Public Health, University of Ghana, Ghana
| | - Åke Bergman
- Department of Environmental Science, Stockholm University, Sweden; Department of Science and Technology, Örebro University, Sweden; College of Environmental Science and Engineering, Tongji University, China
| | - Lesley Brennan
- Department of Obstetrics and Gynaecology, University of Alberta, Canada
| | - Peter D Sly
- Child Health Research Centre, University of Queensland, Australia
| | | | - Antonio Pascale
- Department of Toxicology, University of the Republic, Uruguay
| | - Qihua Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, China
| | - Eddy Y Zeng
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, China
| | - Zhijun Zeng
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, China
| | | | - Marie-Noel Bruné Drisse
- Department of Environment, Climate Change and Health, World Health Organization, Geneva, Switzerland
| | - Xia Huo
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, China.
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17
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Sun XL, Okamoto R, Kido T, Honma S, Manh HD, Nguyen HV, Anh LT, Phuc HD, Oanh NTP, Maruzeni S, Nakagawa H, Nakayama SF, Nhu DD, Tung DV, Tan NTM, Giang LM. Association of dioxin in maternal breast milk and salivary steroid hormone levels in preschool children: A five-year follow-up study of a Vietnam cohort. CHEMOSPHERE 2020; 241:124899. [PMID: 31586830 DOI: 10.1016/j.chemosphere.2019.124899] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 09/09/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Recent studies have found elevated dioxin levels inside some former US military air bases in Vietnam, known as hotspots. The aim of the present study was to evaluate the association of dioxin exposure and steroid hormone in preschool children in Vietnam. In 2010, 2011, 52 primiparae mother-infant pairs in the hotspot and 52 pairs in a non-exposure region were enrolled. For the final analysis, 26 vs 26 pairs were selected, who participated at all three surveys. Univariable and multivariable linear regressions were used to evaluate associations between hormone and dioxin congeners. Geometric mean total TEQ of PCDD/DFs in the hotspot were significantly higher than in the non-exposure region, 8.7 and 3.4 pg TEQ/g lipid, respectively. In the hotspot, salivary dehydroepiandrosterone (DHEA) was significantly higher in 1-year-old children (Boys = 123 pg/mL, Girls = 120 pg/mL) than in the non-exposure region (Boys = 28 pg/mL, Girls = 27 pg/mL). In contrast, DHEA was significantly lower in 5-year-old children (Boys = 70 pg/mL, Girls = 106 pg/mL) in the hotspot than in the non-exposure region (Boys = 496 pg/mL, Girls = 654 pg/mL). Salivary testosterone was significantly lower in the hotspot (Boys = 1.9 pg/mL, Girls = 1.9 pg/m; Boys = 1.0 pg/mL, Girls = 1.1 pg/mL, respectively) than in the non-exposure region (Boys = 3.7 pg/mL, Girls = 3.8 pg/m; Boys = 5.7 pg/mL, Girls = 7.0 pg/mL, respectively) at 3 years and 5 years of age. Higher levels of highly chlorinated dioxins in breast milk were associated with higher DHEA in 1-year-old and lower DHEA and testosterone levels in 5-year-old children. Our findings indicated that dioxins were associated with changes of DHEA and testosterone levels in preschool Vietnamese children.
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Affiliation(s)
- Xian Liang Sun
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, 314-001, China; Faculty of Health Sciences, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan; JSPS International Research Fellow (Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Japan
| | - Rie Okamoto
- Faculty of Health Sciences, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan
| | - Teruhiko Kido
- Faculty of Health Sciences, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan.
| | - Seijiro Honma
- Faculty of Health Sciences, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan
| | - Ho Dung Manh
- Faculty of Pharmacy, Lac Hong University, No. 10 Huynh Van Nghe, Buu Long, Bien Hoa, Dong Nai, Viet Nam
| | - Hoang Viet Nguyen
- Faculty of Medical Technology, Hanoi Medical University, No. 1 Ton That Tung, Dong Da, Hanoi, Viet Nam
| | - Le Thai Anh
- Faculty of Health Sciences, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan
| | - Hoang Duc Phuc
- Hanoi Preventive Medicine Centre, No. 70 Nguyen Chi Thanh, Dong Da, Hanoi, Viet Nam
| | - Nguyen Thi Phuong Oanh
- Faculty of Health Sciences, Institute of Medical Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan
| | - Shoko Maruzeni
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-9641, Japan
| | - Hideaki Nakagawa
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-9641, Japan
| | - Shoji F Nakayama
- Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
| | - Dang Duc Nhu
- Ministry of Health, No 138A Giang 23 Vo, Ba Dinh, Hanoi, Viet Nam
| | - Dao Van Tung
- Viettiep Hospital, No.1 Nha Thuong, Le Chan, Hai Phong, Viet Nam
| | - Ngo Thi Minh Tan
- 10-80 Division, Hanoi Medical University, No.1 Ton That Tung, Dong Da, Hanoi, Viet Nam
| | - Le Minh Giang
- 10-80 Division, Hanoi Medical University, No.1 Ton That Tung, Dong Da, Hanoi, Viet Nam
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Pham The T, Pham Ngoc T, Hoang Van T, Nishijo M, Tran Ngoc N, Vu Thi H, Hoang Van L, Tran Hai A, Nishino Y, Nishijo H. Effects of perinatal dioxin exposure on learning abilities of 8-year-old children in Vietnam. Int J Hyg Environ Health 2020; 223:132-141. [DOI: 10.1016/j.ijheh.2019.09.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 09/25/2019] [Accepted: 09/25/2019] [Indexed: 12/16/2022]
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Nelson W, Wang YX, Sakwari G, Ding YB. Review of the Effects of Perinatal Exposure to Endocrine-Disrupting Chemicals in Animals and Humans. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 251:131-184. [PMID: 31129734 DOI: 10.1007/398_2019_30] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Maternal exposure to endocrine-disrupting chemicals (EDCs) is associated with long-term hormone-dependent effects that are sometimes not revealed until maturity, middle age, or adulthood. The aim of this study was to conduct descriptive reviews on animal experimental and human epidemiological evidence of the adverse health effects of in utero and lactational exposure to selected EDCs on the first generation and subsequent generation of the exposed offspring. PubMed, Web of Science, and Toxline databases were searched for relevant human and experimental animal studies on 29 October 29 2018. Search results were screened for relevance, and studies that met the inclusion criteria were evaluated and qualitative data extracted for analysis. The search yielded 73 relevant human and 113 animal studies. Results from studies show that in utero and lactational exposure to EDCs is associated with impairment of reproductive, immunologic, metabolic, neurobehavioral, and growth physiology of the exposed offspring up to the fourth generation without additional exposure. Little convergence is seen between animal experiments and human studies in terms of the reported adverse health effects which might be associated with methodologic challenges across the studies. Based on the available animal and human evidence, in utero and lactational exposure to EDCs is detrimental to the offspring. However, more human studies are necessary to clarify the toxicological and pathophysiological mechanisms underlying these effects.
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Affiliation(s)
- William Nelson
- Joint International Research Laboratory of Reproductive and Development, Department of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Ying-Xiong Wang
- Joint International Research Laboratory of Reproductive and Development, Department of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Gloria Sakwari
- Department of Environmental and Occupational Health, School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Yu-Bin Ding
- Joint International Research Laboratory of Reproductive and Development, Department of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, People's Republic of China.
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Burns JS, Williams PL, Sergeyev O, Korrick SA, Rudnev S, Plaku-Alakbarova B, Revich B, Hauser R, Lee MM. Associations of peri-pubertal serum dioxins and polychlorinated biphenyls with growth and body composition among Russian boys in a longitudinal cohort. Int J Hyg Environ Health 2019; 223:228-237. [PMID: 31466867 DOI: 10.1016/j.ijheh.2019.08.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 08/15/2019] [Accepted: 08/16/2019] [Indexed: 01/06/2023]
Abstract
BACKGROUND Childhood exposure to organochlorines has been associated with alterations in somatic growth. We evaluated the associations of peri-pubertal serum levels of dioxin-like compounds (DLCs) and nondioxin-like polychlorinated biphenyls (NDL-PCBs), with adolescent growth, body composition, and near adult height (NAH) in a longitudinal cohort study of Russian boys. METHODS 473 8-9 year-old boys had serum DLCs and associated toxic equivalents (TEQs) and NDL-PCBs concentrations measured. Physical examinations were performed at enrollment between 2003 and 2005, and annually over 11 years to 2016; annual bio-electric impedance analysis (BIA) of body composition began in 2006. We used mixed effects models to evaluate associations of quartiles of serum chemical concentrations with longitudinal measurements through age 19 of body mass index (BMI-Z) and height (HT-Z) z-scores, annual height velocity (HV), and BIA-derived height-adjusted fat (FMi) and fat-free mass (FFMi) indexes. Potential modification by age of the associations of chemical exposures with growth was evaluated. NAH (defined as HV < 1 cm/year) and age at NAH attainment were estimated using parametric survival models accounting for right censoring. RESULTS The medians of serum ∑TEQs, ∑DLCs, and ∑NDL-PCBs were 21.1 pg TEQ/g lipid, 362 pg/g lipid, and 250 ng/g lipid, respectively. In multivariable models, higher serum concentrations of peri-pubertal ∑TEQs, ∑DLCs, and ∑NDL-PCBs were associated with significantly lower BMI-Z, FMi, and FFMi over 11 years of follow-up. The differences in FFMi for boys with higher versus lower ΣTEQs and ΣNDL-PCBs increased with age. In multivariable models, higher ∑NDL-PCBs were associated with lower HT-Z, with attenuation of the association with age (interaction p < 0.001). The highest versus the lowest quartiles of ∑NDL-PCBs were not associated with differences in NAH, but were associated with an average of 6 months later attainment of NAH. CONCLUSIONS Our findings suggest that dioxin and NDL-PCB exposures during childhood are associated with alterations in body composition and subsequent somatic growth.
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Affiliation(s)
- Jane S Burns
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA.
| | - Paige L Williams
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA
| | - Oleg Sergeyev
- Group of Epigenetic Epidemiology, A.N. Belozersky Research Institute of Physico-Chemical Biology, Moscow State University, Leninskye Gory, House 1, Building 40, Room 322, 119234, Moscow, Russia; Chapaevsk Medical Association, Meditsinskaya Str., 3a, Chapaevsk, Samara Region, 446100, Russia
| | - Susan A Korrick
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Sergey Rudnev
- Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences, Gubkin Str., 8, 119333, Moscow, Russia
| | - Bora Plaku-Alakbarova
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA
| | - Boris Revich
- Institute for Forecasting, Russian Academy of Sciences, 47 Nakhimovsky Prosp., Moscow, 117418, Russia
| | - Russ Hauser
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA
| | - Mary M Lee
- Nemours AI DuPont Hospital for Children/Sidney Kimmel Medical School, Jefferson University, 1600 Rockland Road, Suite 2C, Wilmington, DE, 19803, USA
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21
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Pham NT, Nishijo M, Pham TT, Tran NN, Le VQ, Tran HA, Phan HAV, Nishino Y, Nishijo H. Perinatal dioxin exposure and neurodevelopment of 2-year-old Vietnamese children in the most contaminated area from Agent Orange in Vietnam. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 678:217-226. [PMID: 31075589 DOI: 10.1016/j.scitotenv.2019.04.425] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/28/2019] [Accepted: 04/28/2019] [Indexed: 05/19/2023]
Abstract
Bien Hoa airbase is the most contaminated area of dioxin contamination from Agent Orange in Vietnam, but little is known about the neurodevelopmental effects of perinatal dioxin exposure on children living nearby. We recruited 210 mother-newborn resident pairs in 2012 and 78 pairs in 2015 and followed them for 2 years to assess the children's neurodevelopment. As a control group, we used 120 mother-child pairs recruited in 2014 in the Ha Dong district of Ha Noi City, an unexposed area. Perinatal dioxin exposure levels were indicated by levels of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and toxic equivalency values of polychlorodibenzodioxins, polychlorodibenzofurans, and nonortho-polychlorinated biphenyls (TEQ-PCDD/Fs/noPCBs) in maternal breast milk. The Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III) were used to assess neurodevelopment, and scores in each domain were compared between children with different exposure levels using general linear regression models and stratification by sex. Decreased expressive and composite language scores in boys and gross motor scores in girls were found in children exposed to TCDD ≥ 5.5 (pg/g lipid) compared with children with TCDD < 1.8. However, in matched pair analysis between children with TCDD ≥ 5.5 and <1.8 (pg/g lipid), lower expressive and composite language scores in boys exposed to TCDD ≥ 5.5 were significant, but lower gross motor scores in girls did not reach statistical significance. In addition, significant association was found between levels of PCDD congeners other than TCDD and gross motor scores in boys. These findings suggest that perinatal exposure of TCDD and other PCDD congeners affects development of language and gross motor skills, respectively, in boys at 2 years of age exposed to dioxins originating from Agent Orange in Vietnam.
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Affiliation(s)
- Ngoc Thao Pham
- Department of Public Health, Kanazawa Medical University, Japan; Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | - Muneko Nishijo
- Department of Public Health, Kanazawa Medical University, Japan.
| | - The Tai Pham
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | | | - Van Quan Le
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | - Hai Anh Tran
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Viet Nam
| | - Huy Anh Vu Phan
- Department of Health, Dong Nai Prefecture Government, Bien Hoa, Viet Nam
| | | | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine, University of Toyama, Japan
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Wang Z, Hang JG, Feng H, Shi LL, Dong JJ, Shen B, Luo T, Cai RM, Shen LJ, Kido T, Sun XL. Effects of perinatal dioxin exposure on development of children: a 3-year follow-up study of China cohort. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:20780-20786. [PMID: 31102233 DOI: 10.1007/s11356-019-05362-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
The purpose of this study was to investigate the longitudinal effects of perinatal exposure to dioxin on physical growth in a 3-year follow-up study. In 2015, 27 mother-infant pairs living in an electronic waste (e-waste) dismantling region and 35 pairs living in a control region were enrolled in the present study. Breast milk samples were collected at 4 weeks after birth. Physical growth, including weight, height, and head and chest circumferences, was measured at 6 months and 3 years of age. Dioxin levels in the breast milk were measured by gas chromatography/high-resolution mass spectrometry. Levels of 2,3,7,8-tetrachlorodibenzo-p-dioxin and toxic equivalency values in maternal breast milk of polychlorinated dibenzodioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and PCDDs/PCDFs were significantly higher in women residing in the e-waste dismantling region. In 3-year-old boys, inverse associations were found between height and PCDDs-TEQ. In girls, positive associations were found between height and 2,3,7,8-TetraCDD, PCDDs-TEQ, and PCDDs/PCDFs-TEQ, and for weight and PCDDs-TEQ and PCDDs/PCDFs-TEQ at 3 years of age. In this study, sex-specific differences were observed in children, in whom dioxin exposure decreased growth in boys but increased growth in girls during the first 3 years of life.
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Affiliation(s)
- Zheng Wang
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China
| | - Jin Guo Hang
- Taizhou Enze Medical Center Enze Hospital, Taizhou, Zhejiang, China
| | - Hao Feng
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China
| | - Li Li Shi
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China
| | - Jing Jian Dong
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China
| | - Bin Shen
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China
| | - Ting Luo
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China
| | - Ren Mei Cai
- The Second Hospital of Jiaxing, Jiaxing, Zhejiang, China
| | - Ling Jie Shen
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China
| | - Teruhiko Kido
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical, and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Xian Liang Sun
- Department of Public Health, School of Medicine, Jiaxing University, 118 Jiahang Road, Jiaxing, Zhejiang, 314-001, China.
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical, and Health Sciences, Kanazawa University, Kanazawa, Japan.
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23
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Nghiem GT, Nishijo M, Pham TN, Ito M, Pham TT, Tran AH, Nishimaru H, Nishino Y, Nishijo H. Adverse effects of maternal dioxin exposure on fetal brain development before birth assessed by neonatal electroencephalography (EEG) leading to poor neurodevelopment; a 2-year follow-up study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 667:718-729. [PMID: 30849612 DOI: 10.1016/j.scitotenv.2019.02.395] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/13/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
We previously reported the adverse effects of perinatal dioxin exposure on child neurodevelopment around a former US military airbase in Vietnam. In the present study, we investigated the effects of maternal dioxin exposure on fetal brain development, which may predict neurodevelopmental outcomes in early childhood. A total of 55 newborns with mothers from dioxin-contaminated areas were recruited in the prefecture hospital in Bien Hoa, Vietnam. Dioxins in maternal breast milk collected 1 month after birth were used as a maternal exposure marker. Relative powers and coherence were computed from neonatal electroencephalogram (EEG) records during active sleep stages. Relationships between the EEG parameters and dioxin exposure markers were analyzed using linear regression and a general linear model after adjusting for gestational age, body length, and head circumference of infants at birth. Using data from 47 infants whose neurodevelopment was examined in a 2-year follow-up study, associations between EEG parameters and neurodevelopment were analyzed after adjusting for confounding factors. On the right frontal and parietal regions, relative delta powers were significantly decreased, and relative alpha and beta powers were significantly increased with increasing dioxin exposure. Increases in delta power and decreases in alpha power on the right frontal and parietal regions were associated with an increase in language scores at 2 years of age. Furthermore, intra- and inter-hemispheric coherence in theta and alpha bands were positively and inversely correlated with dioxin exposure, respectively, and increased intra-coherence in the right hemisphere was associated with lower language scores. These findings suggest that prenatal dioxin exposure affects neuronal activity and functional connectivity between brain regions, and may lead to poor language development.
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Affiliation(s)
- GiangThi Thuy Nghiem
- System Emotional Science, Graduate School of Medicine, University of Toyama, Toyama 930-0194, Japan
| | - Muneko Nishijo
- Department of Public Health, Kanazawa Medical University, Ishikawa 920-0293, Japan.
| | - Thao Ngoc Pham
- Department of Public Health, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Mika Ito
- Department of Obstetrics and Gynecology, University of Toyama, Toyama 930-0194, Japan
| | - Tai The Pham
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Hanoi, Viet Nam
| | - Anh Hai Tran
- Biomedical and Pharmaceutical Research Center, Vietnamese Military Medical University, Hanoi, Viet Nam
| | - Hiroshi Nishimaru
- System Emotional Science, Graduate School of Medicine, University of Toyama, Toyama 930-0194, Japan
| | - Yoshikazu Nishino
- Department of Public Health, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine, University of Toyama, Toyama 930-0194, Japan
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Warner M, Rauch S, Ames J, Mocarelli P, Brambilla P, Signorini S, Eskenazi B. In utero dioxin exposure and cardiometabolic risk in the Seveso Second Generation Study. Int J Obes (Lond) 2019; 43:2233-2243. [PMID: 30659254 PMCID: PMC6639155 DOI: 10.1038/s41366-018-0306-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 11/08/2018] [Accepted: 12/06/2018] [Indexed: 02/06/2023]
Abstract
Background/Objectives: In utero exposure to endocrine-disrupting compounds such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) may alter risk of obesity and related metabolic disease later in life. We examined the relationship of prenatal exposure to TCDD with obesity and metabolic syndrome (MetS) in children born to a unique cohort of TCDD-exposed women resulting from a 1976 explosion in Seveso, Italy. Subjects/Methods: In 2014, nearly 40 years after the explosion, we enrolled 611 post-explosion offspring, 2 to 39 years of age, in the Seveso Second Generation study. In utero TCDD exposure was defined primarily as TCDD concentration measured in maternal serum collected soon after the explosion and alternately as TCDD estimated at pregnancy. We measured height, weight, waist circumference, body fat, blood pressure, and fasting blood levels of lipids and glucose, which were combined to assess body mass index (BMI) and MetS. Results: Children (314 female, 297 male) averaged 23.6 (±6.0) years of age. Among the 431 children ≥18 years, a 10-fold increase in initial maternal TCDD concentration was inversely associated with BMI in daughters (adj-β=−0.99 kg/m2; 95% CI −1.86, −0.12), but not sons (adj-β=0.41 kg/m2; 95% CI −0.35, 1.18) (p-int=0.02). A similar relationship was found in the younger children (2-17 years); a 10-fold increase in initial maternal TCDD was inversely associated with BMI z-score (adj-β = −0.59 kg/m2; 95% CI −1.12, −0.06) among daughters, but not sons (adj-β = 0.04 kg/m2; 95% CI −0.34, 0.41) (p-int=0.03). In contrast, in sons only, initial maternal TCDD was associated with increased risk for MetS (adj-RR = 2.09, 95% CI 1.09, 4.02). Results for TCDD estimated at pregnancy were comparable. Conclusions: These results suggest prenatal TCDD exposure alters cardiometabolic endpoints in a sex-specific manner. In daughters, in utero TCDD is inversely associated with adiposity measures. In sons, in utero TCDD is associated with increased risk for MetS.
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Affiliation(s)
- Marcella Warner
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, CA, USA.
| | - Stephen Rauch
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, CA, USA
| | - Jennifer Ames
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, CA, USA
| | - Paolo Mocarelli
- Department of Laboratory Medicine, School of Medicine, Hospital of Desio, University of Milano-Bicocca, Desio-Milano, Italy
| | - Paolo Brambilla
- Department of Laboratory Medicine, School of Medicine, Hospital of Desio, University of Milano-Bicocca, Desio-Milano, Italy
| | - Stefano Signorini
- Department of Laboratory Medicine, School of Medicine, Hospital of Desio, University of Milano-Bicocca, Desio-Milano, Italy
| | - Brenda Eskenazi
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, CA, USA
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Prenatal dioxin exposure and neuropsychological functioning in the Seveso Second Generation Health Study. Int J Hyg Environ Health 2019; 222:425-433. [PMID: 30638868 DOI: 10.1016/j.ijheh.2018.12.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/30/2018] [Accepted: 12/20/2018] [Indexed: 11/20/2022]
Abstract
BACKGROUND Prenatal 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure has been shown to alter sexual differentiation of the brain in animal models, impacting pubertal development, behavior, cortical dominance, and cognition. The effects of early life exposure to dioxin-like compounds on human neurodevelopment, however, are less clear and warrant further investigation. METHODS The Seveso Women's Health Study (SWHS), initiated in 1996, is a well-characterized cohort of 981 Italian women who lived in proximity to an industrial accident in July 1976 that resulted in one of the highest residential TCDD exposures on record. In 2014-2016, we enrolled offspring born after the accident into the Seveso Second Generation Health Study. Children aged 7-17 years old (n = 161) completed a neuropsychological assessment spanning executive function and reverse learning (Wisconsin Card Sort), non-verbal intelligence (Raven's Progressive Matrices), attention and hyperactivity (Connor's Continuous Performance (CPT), and memory (Rey's Auditory Verbal Learning). We used multivariate regression with robust standard error estimates accounting for clustering of siblings to model the associations between these outcomes and prenatal exposure defined as TCDD measured in maternal serum collected soon after the explosion and estimated to pregnancy. RESULTS The children (82 male, 79 female) averaged 13.1 (±2.9) years of age. Adjusting for covariates, a 10-fold increase in maternal serum TCDD was not adversely associated with reverse learning/set-shifting, memory, attention/impulsivity, or non-verbal intelligence. In sex-stratified models, prenatal TCDD was associated with more non-perseverative errors in boys but not in girls (pint = 0.04). TCDD was also associated with attention deficits on the CPT but only among children with the shortest breastfeeding histories. CONCLUSIONS While overall, there were no significant associations, the observed differential neurotoxic sensitivities to TCDD by sex and lactation history may warrant confirmation in future studies.
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Zhang HJ, Liu YN, Xian P, Ma J, Sun YW, Chen JS, Chen X, Tang NJ. Maternal exposure to TCDD during gestation advanced sensory-motor development, but induced impairments of spatial learning and memory in adult male rat offspring. CHEMOSPHERE 2018; 212:678-686. [PMID: 30176550 DOI: 10.1016/j.chemosphere.2018.08.118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 08/15/2018] [Accepted: 08/23/2018] [Indexed: 05/19/2023]
Abstract
2,3,7,8-Tetrachlorodibenzo-p-Dioxin (TCDD) is an endocrine disrupting chemical (EDC) with high persistency. Even a low amount can pass the placental barrier during gestational exposure. Exposure to TCDD exposure can impair the development of the nervous system in children, leading to impaired learning ability in later-life. But the changes in neurobehavioral developments in infancy and childhood caused by TCDD are unknown. Pregnant Sprague-Dawley rats were given a consecutive daily dose of TCDD (200 or 800 ng/day/kg) or an equivalent volume of vehicle by gavage on gestational days 8-14 (GD 8-14) as the prenatal TCDD exposure model. In the offspring, early neurobehavioral development was assessed at postnatal day 5 (PND5) and eye-opening was monitored from PND10 onwards. Adult male offspring was tested by Morris Water Maze for spatial memory and learning ability evaluation. Hippocampus Nissl's staining and astrocyte GFAP immunohistochemistry were used to evaluate the activity of astrocytes. The results of the behavioral tests showed that gestational TCDD exposure induced premature motor activity and earlier eyes-opening, but lead to serious deficits of spatial memory and learning ability in the adult male offspring. Morphology and number of neurons in the hippocampus CA1 region was not affected, while the activity of astrocytes in the same region was significantly reduced. These data indicate that perinatal TCDD exposure induced premature neurobehavioral development but impaired the spatial learning and memory in adult male rat offspring. The decreased activity of astrocytes in the hippocampus may play a role in these adverse effects.
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Affiliation(s)
- Hua-Jing Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China.
| | - Ya-Nan Liu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China.
| | - Ping Xian
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China.
| | - Jing Ma
- Tianjin Cardiovascular Diseases Institute, Tianjin Chest Hospital, Tianjin, 300350, China.
| | - Ya-Wen Sun
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China.
| | - Jing-Shan Chen
- Department of Technology and Science, Tianjin Medical University General Hospital, Tianjin, 300052, China.
| | - Xi Chen
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China.
| | - Nai-Jun Tang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China.
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27
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LaKind JS, Lehmann GM, Davis MH, Hines EP, Marchitti SA, Alcala C, Lorber M. Infant Dietary Exposures to Environmental Chemicals and Infant/Child Health: A Critical Assessment of the Literature. ENVIRONMENTAL HEALTH PERSPECTIVES 2018; 126:96002. [PMID: 30256157 PMCID: PMC6375563 DOI: 10.1289/ehp1954] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 08/02/2018] [Accepted: 08/13/2018] [Indexed: 05/24/2023]
Abstract
BACKGROUND The benefits of breastfeeding to the infant and mother have been well documented. It is also well known that breast milk contains environmental chemicals, and numerous epidemiological studies have explored relationships between background levels of chemicals in breast milk and health outcomes in infants and children. OBJECTIVES In this paper, we examine epidemiological literature to address the following question: Are infant exposures to background levels of environmental chemicals in breast milk and formula associated with adverse health effects? We critically review this literature a) to explore whether exposure-outcome associations are observed across studies, and b) to assess the literature quality. METHODS We reviewed literature identified from electronic literature searches. We explored whether exposure-outcome associations are observed across studies by assessing the quality (using a modified version of a previously published quality assessment tool), consistency, and strengths and weaknesses in the literature. The epidemiological literature included cohorts from several countries and examined infants/children either once or multiple times over weeks to years. Health outcomes included four broad categories: growth and maturation, morbidity, biomarkers, and neurodevelopment. RESULTS The available literature does not provide conclusive evidence of consistent or clinically relevant health consequences to infants exposed to environmental chemicals in breast milk at background levels. CONCLUSIONS It is clear that more research would better inform our understanding of the potential for health impacts from infant dietary exposures to environmental chemicals. A critical data gap is a lack of research on environmental chemicals in formula and infant/child health outcomes. https://doi.org/10.1289/EHP1954.
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Affiliation(s)
- Judy S LaKind
- 1 LaKind Associates, LLC, Catonsville, Maryland, USA
- 2 Department of Epidemiology and Public Health, University of Maryland School of Medicine , Baltimore, Maryland, USA
| | - Geniece M Lehmann
- 3 Office of Research and Development (ORD), U.S. Environmental Protection Agency (EPA), Research Triangle Park , North Carolina, USA
| | - Matthew H Davis
- 4 Office of Children's Health Protection, U.S. EPA, Washington, District of Columbia, USA
| | - Erin P Hines
- 3 Office of Research and Development (ORD), U.S. Environmental Protection Agency (EPA), Research Triangle Park , North Carolina, USA
| | - Satori A Marchitti
- 5 Oak Ridge Institute for Science and Education (ORISE), ORD, U.S. EPA, Athens, Georgia, USA
| | - Cecilia Alcala
- 6 Association of Schools and Programs of Public Health (ASPPH), ORD, U.S. EPA, Washington, District of Columbia, USA
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Nguyen ATN, Nishijo M, Pham TT, Tran NN, Tran AH, Hoang LV, Boda H, Morikawa Y, Nishino Y, Nishijo H. Sex-specific effects of perinatal dioxin exposure on eating behavior in 3-year-old Vietnamese children. BMC Pediatr 2018; 18:213. [PMID: 29976197 PMCID: PMC6034299 DOI: 10.1186/s12887-018-1171-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 06/11/2018] [Indexed: 02/11/2023] Open
Abstract
Background We previously reported that perinatal dioxin exposure increased autistic traits in children living in dioxin-contaminated areas of Vietnam. In the present study, we investigated the impact of dioxin exposure on children’s eating behavior, which is often altered in those with developmental disorders. Methods A total of 185 mother-and-child pairs previously enrolled in a birth cohort in dioxin-contaminated areas participated in this survey, conducted when the children reached 3 years of age. Perinatal dioxin exposure levels in the children were estimated using dioxin levels in maternal breast milk after birth. Mothers were interviewed using the Children’s Eating Behaviour Questionnaire (CEBQ). A multiple linear regression model was used to analyze the association between dioxin exposure and CEBQ scores, after controlling for covariates such as location, parity, maternal age, maternal education, maternal body mass index, family income, children’s gestational age at delivery, and children’s age at the time of the survey. A general linear model was used to analyze the effects of sex and dioxin exposure on CEBQ scores. Results There was no significant association between most dioxin congeners or toxic equivalencies of polychlorinated dibenzo-p-dioxins/furans (TEQ-PCDDs/Fs) and CEBQ scores in boys, although significant associations between some eating behavior sub-scores and 1,2,3,4,6,7,8,9-octachlorodibenzofuran were observed. In girls, there was a significant inverse association between levels of TEQ-PCDFs and enjoyment of food scores and between levels of TEQ-PCDFs and TEQ-PCDDs/Fs and desire to drink scores. Two pentachlorodibenzofuran congeners and 1,2,3,6,7,8-hexachlorodibenzofuran were associated with a decreased enjoyment of food score, and seven PCDF congeners were associated with a decreased desire to drink score. The adjusted mean enjoyment of food score was significantly lower in children of both sexes exposed to high levels of TEQ-PCDFs. There was, however, a significant interaction between sex and TEQ-PCDF exposure in their effect on desire to drink scores, especially in girls. Conclusions Perinatal exposure to dioxin can influence eating behavior in children and particularly in girls. A longer follow-up study would be required to assess whether emotional development that affects eating styles and behaviors is related to dioxin exposure. Electronic supplementary material The online version of this article (10.1186/s12887-018-1171-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anh Thi Nguyet Nguyen
- Department of Public Health and Epidemiology, Kanazawa Medical University, 1-1, Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Muneko Nishijo
- Department of Public Health and Epidemiology, Kanazawa Medical University, 1-1, Daigaku, Uchinada, Ishikawa, 920-0293, Japan.
| | - Tai The Pham
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam
| | - Nghi Ngoc Tran
- Department of Public Health and Epidemiology, Kanazawa Medical University, 1-1, Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Anh Hai Tran
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam
| | - Luong Van Hoang
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam
| | - Hitomi Boda
- School of Nursing, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Yuko Morikawa
- School of Nursing, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Yoshikazu Nishino
- Department of Public Health and Epidemiology, Kanazawa Medical University, 1-1, Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
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Van Luong H, Tai PT, Nishijo M, Trung DM, Thao PN, Van Son P, Van Long N, Linh NT, Nishijo H. Association of dioxin exposure and reproductive hormone levels in men living near the Bien Hoa airbase, Vietnam. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 628-629:484-489. [PMID: 29453177 DOI: 10.1016/j.scitotenv.2018.02.094] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/08/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
Dioxins are endocrine-disrupting chemicals, and their effects on reproductive functions are well-documented. The aim of the present study was to measure the levels of reproductive hormones in 42 men residing near a dioxin-contaminated area in Vietnam. We measured levels of 17 2,3,7,8-substituted congeners of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) and four non-ortho polychlorinated biphenyls (PCBs) in blood. Levels of follicle-stimulating hormone, luteinizing hormone, progesterone, prolactin, estradiol, and total testosterone were measured in serum. Blood dioxin levels were elevated; the levels of 2,3,7,8-tetrachlorodibenzo-p-dioxin was 7.3pg/g fat. Seven of the men had testosterone levels below 250ng/dL, and nine men had prolactin levels above 9.7ng/mL. Four PCDD congeners, two PCDF congeners, one PCB congener, and the sum TEQ of PCDDs, PCDDs/Fs, and PCDDs/Fs/PCBs were positively and significantly correlated with prolactin levels. Two PCDD congeners, six PCDF congeners, two PCB congeners, and the TEQs of PCDFs and PCBs were negatively and significantly correlated with testosterone levels. There were no significant correlations between dioxin congeners and follicle-stimulating hormone, luteinizing hormone, or progesterone levels.
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Affiliation(s)
- Hoang Van Luong
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Pham The Tai
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam.
| | - Muneko Nishijo
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan
| | - Do Minh Trung
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Pham Ngoc Thao
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam; Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan
| | - Pham Van Son
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Nguyen Van Long
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Nguyen Tung Linh
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, 160-Phung Hung, Ha Dong, Ha Noi, Viet Nam
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Japan
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Bor A, Nishijo M, Nishimaru H, Nakamura T, Tran NN, Van Le Q, Takamura Y, Matsumoto J, Nishino Y, Nishijo H. Effects of high fat diet and perinatal dioxin exposure on development of body size and expression of platelet-derived growth factor receptor β in the rat brain. J Integr Neurosci 2018; 16:453-470. [PMID: 28891521 DOI: 10.3233/jin-170025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Environmental exposure to dioxins, consumption of a high fat diet, and platelet-derived growth factor receptor β signaling in the brain affect feeding behavior, which is an important determinant of body growth. In the present study, we investigated the effects of prenatal exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin and high fact diet after weaning on body growth and expression of platelet-derived growth factor receptor β in the brain in rat pups. Subjects from the control and dioxin exposure groups were assigned to 1 of 3 different diet groups: standard diet, high fat diet in the juvenile period, or high fat diet in adulthood. Body weight gain rate in the juvenile high fat diet group and the length gain rate in the adult high fat diet group were greater than the corresponding values in the standard diet group only in male offspring, although the effects of dioxin exposure on growth were not significant. Consumption of a high fat diet decreased platelet-derived growth factor receptor β levels in the amygdala and hippocampus in both sexes compared to control groups, while 2,3,7,8-tetrachlorodibenzo-p-dioxin decreased platelet-derived growth factor receptor platelet-derived growth factor receptor β levels in the amygdala and striatum only in females receiving an high fat diet. Furthermore, platelet-derived growth factor receptor β levels in the hippocampus and platelet-derived growth factor receptor β striatum were inversely correlated with increases in body length, while changes in platelet-derived growth factor receptor β in the amygdala and nucleus accumbens were significantly correlated to body weight gain or body mass index. In conclusion, these findings suggest that these 2,3,7,8-tetrachlorodibenzo-p-dioxin and high fat diet-induced changes in body growth and feeding behaviors might be partially mediated by changes in brain platelet-derived growth factor receptor β levels.
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Affiliation(s)
- Amartuvshin Bor
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. E-mails: , , , , , ,
| | - Muneko Nishijo
- Department of Public Health and Epidemiology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan. E-mails: , ,
| | - Hiroshi Nishimaru
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. E-mails: , , , , , ,
| | - Tomoya Nakamura
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. E-mails: , , , , , ,
| | - Nghi Ngoc Tran
- Department of Public Health and Epidemiology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan. E-mails: , ,
| | - Quang Van Le
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. E-mails: , , , , , ,
| | - Yusaku Takamura
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. E-mails: , , , , , ,
| | - Jumpei Matsumoto
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. E-mails: , , , , , ,
| | - Yoshikazu Nishino
- Department of Public Health and Epidemiology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan. E-mails: , ,
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. E-mails: , , , , , ,
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Sergeyev O, Burns JS, Williams PL, Korrick SA, Lee MM, Revich B, Hauser R. The association of peripubertal serum concentrations of organochlorine chemicals and blood lead with growth and pubertal development in a longitudinal cohort of boys: a review of published results from the Russian Children's Study. REVIEWS ON ENVIRONMENTAL HEALTH 2017; 32:83-92. [PMID: 28231067 PMCID: PMC5536108 DOI: 10.1515/reveh-2016-0052] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 01/23/2017] [Indexed: 06/01/2023]
Abstract
Organochlorine chemicals and lead are environmental exposures that have endocrine disrupting properties (EDCs) which interfere with many aspects of hormone action. Childhood and adolescence are windows of susceptibility for adverse health effects of EDCs. Our ongoing study, the Russian Children's Study (RCS), is one of the few longitudinal studies investigating the impact of EDCs on growth and puberty in boys. It is conducted in the historically contaminated city of Chapaevsk, in the Samara region. The study focuses on evaluating the associations of persistent organochlorine chemicals and lead with growth and pubertal timing. At enrollment in 2003-2005, we collected blood from 516 boys at ages 8-9 years to measure dioxins, furans, polychlorinated biphenyls (PCBs), chlorinated pesticides and lead. At enrollment and at annual visits through the ages of 18-19 years, a physician performed physical examinations that included pubertal staging and testicular volume measurements. We review the history of Chapaevsk as a research site and summarize published RCS data on the association of peripubertal serum concentrations of organochlorines and blood lead levels with growth, pubertal onset and sexual maturity. Overall, we found that persistent organochlorines and lead negatively affected growth during puberty. Our results also suggest that total toxic equivalents (TEQs), dioxin-like compounds, organochlorine pesticides and lead may delay, while nondioxin-like-PCBs may advance, the timing of male puberty. These findings promoted remediation programs in Chapaevsk, with improvement in health indicators, resulting in Chapaevsk being designated a member of the World Health Organization (WHO) network "Healthy Cities" in 2015.
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Affiliation(s)
- Oleg Sergeyev
- Department of Genomics and Human Genetics Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia
- Chapaevsk Medical Association, Chapaevsk, Samara Region, Russia
| | - Jane S. Burns
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA
| | - Paige L. Williams
- Departments of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Susan A. Korrick
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Mary M. Lee
- Pediatric Endocrine Division, Departments of Pediatrics, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Cell and Developmental Biology, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Boris Revich
- Institute for Forecasting, Russian Academy of Sciences, Moscow, Russia
| | - Russ Hauser
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA
- Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
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