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Oh J, Schweitzer JB, Buckley JP, Upadhyaya S, Kannan K, Herbstman JB, Ghassabian A, Schmidt RJ, Hertz-Picciotto I, Bennett DH. Early childhood exposures to phthalates in association with attention-deficit/hyperactivity disorder behaviors in middle childhood and adolescence in the ReCHARGE study. Int J Hyg Environ Health 2024; 259:114377. [PMID: 38692176 DOI: 10.1016/j.ijheh.2024.114377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/19/2024] [Accepted: 03/31/2024] [Indexed: 05/03/2024]
Abstract
BACKGROUND Early-life exposure to phthalates alters behaviors in animals. However, epidemiological evidence on childhood phthalate exposure and attention-deficit/hyperactivity disorder (ADHD) behaviors is limited. METHODS This study included 243 children from the ReCHARGE (Revisiting Childhood Autism Risks from Genetics and Environment) study, who were previously classified as having autism spectrum disorder (ASD), developmental delay, other early concerns, and typical development in the CHARGE case-control study. Twenty phthalate metabolites were measured in spot urine samples collected from children aged 2-5 years. Parents reported on children's ADHD symptoms at ages 8-18 years using Conners-3 Parent Rating Scale. Covariate-adjusted negative binomial generalized linear models were used to investigate associations between individual phthalate metabolite concentrations and raw scores. Weighted quantile sum (WQS) regression with repeated holdout validation was used to examine mixture effects of phthalate metabolites on behavioral scores. Effect modification by child sex was evaluated. RESULTS Among 12 phthalate metabolites detected in >75% of the samples, higher mono-2-heptyl phthalate (MHPP) was associated with higher scores on Inattentive (β per doubling = 0.05, 95% confidence interval [CI]: 0.02, 0.08) and Hyperactive/Impulsive scales (β = 0.04, 95% CI: 0.00, 0.07), especially among children with ASD. Higher mono-carboxy isooctyl phthalate (MCiOP) was associated with higher Hyperactivity/Impulsivity scores (β = 0.07, 95% CI: -0.01, 0.15), especially among typically developing children. The associations of the molar sum of high molecular weight (HMW) phthalate metabolites and a phthalate metabolite mixture with Hyperactivity/Impulsivity scores were modified by sex, showing more pronounced adverse associations among females. CONCLUSION Exposure to phthalates during early childhood may impact ADHD behaviors in middle childhood and adolescence, particularly among females. Although our findings may not be broadly generalizable due to the diverse diagnostic profiles within our study population, our robust findings on sex-specific associations warrant further investigations.
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Affiliation(s)
- Jiwon Oh
- Department of Public Health Sciences, University of California Davis, Davis, CA, USA
| | - Julie B Schweitzer
- Department of Psychiatry and Behavioral Sciences, University of California at Davis, Sacramento, CA, USA; UC Davis MIND (Medical Investigations of Neurodevelopmental Disorders) Institute, Sacramento, CA, USA
| | - Jessie P Buckley
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Sudhi Upadhyaya
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Kurunthachalam Kannan
- Division of Environmental Health Sciences, Wadsworth Center, New York State Department of Health, Albany, NY, USA; Department of Environmental Health Sciences, University at Albany, State University of New York, Albany, NY, USA
| | - Julie B Herbstman
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, USA
| | - Akhgar Ghassabian
- Department of Pediatrics and Population Health, New York University Grossman School of Medicine, New York, NY, USA
| | - Rebecca J Schmidt
- Department of Public Health Sciences, University of California Davis, Davis, CA, USA; UC Davis MIND (Medical Investigations of Neurodevelopmental Disorders) Institute, Sacramento, CA, USA
| | - Irva Hertz-Picciotto
- Department of Public Health Sciences, University of California Davis, Davis, CA, USA; UC Davis MIND (Medical Investigations of Neurodevelopmental Disorders) Institute, Sacramento, CA, USA
| | - Deborah H Bennett
- Department of Public Health Sciences, University of California Davis, Davis, CA, USA.
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Hou B, Wang Y, Li B, Gong T, Wu J, Li J. Synthesis of novel L-lactic acid-based plasticizers and their effects on the flexibility, crystallinity, and optical transparency of poly(lactic acid). Int J Biol Macromol 2024; 273:132826. [PMID: 38825277 DOI: 10.1016/j.ijbiomac.2024.132826] [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: 11/28/2023] [Revised: 05/09/2024] [Accepted: 05/30/2024] [Indexed: 06/04/2024]
Abstract
Using bio-based plasticizers derived from biomass resources to replace traditional phthalates can avoid the biotoxicity and non-biodegradability caused by the migration of plasticizers during the application of plastics. In this study, L-lactic acid and levulinic acid were employed as the major biomass monomer to successfully fabricate L-lactic acid-based plasticizers (LBL-n, n = 1.0, 1.5, 2.0, 2.5) containing a diverse number of lactate groups. The plasticizing mechanism was explained, manifesting that L-lactic acid-based plasticizers containing a substantial number of lactate groups could effectively improve the flexibility of poly (lactic acid) (PLA), and the elongation at break was 590 %-750 %. Compared to LBL-1.5 plasticized-PLA films, the tensile strength and modulus of ketonized-LBL-1.5 (KLBL-1.5) plasticized-PLA films increased to 59 % and 163 %, indicating the ketal functionality of plasticizers enhanced the strength of PLA. Meanwhile, the increment of lactate groups and the introduction of the ketal group in the plasticizer increased the crystallization, migration, and volatilization stability of plasticized-PLA films and also kept their outstanding optical transparency. Besides, the biodegradability of KLBL-1.5 was investigated by active soil and Tenebrio molitor experiments, and its degradation products were characterized. The findings indicated that KLBL-1.5 was fully decomposed. Taken together, this paper offers new promise for developing high-efficiency and biodegradable plasticizers.
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Affiliation(s)
- Boyou Hou
- School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Yanning Wang
- School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Bingjian Li
- Unipower Hydrogen Membrane Materials (Jiangsu) Research Institute Co., Ltd., China
| | - Tianyang Gong
- School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Jianming Wu
- Changshu Sanheng Building Material Co. Ltd, Changshu 215500, China
| | - Jinchun Li
- School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China; Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Changzhou University, Changzhou 213164, China.
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Toledano JM, Puche-Juarez M, Moreno-Fernandez J, Gonzalez-Palacios P, Rivas A, Ochoa JJ, Diaz-Castro J. Implications of Prenatal Exposure to Endocrine-Disrupting Chemicals in Offspring Development: A Narrative Review. Nutrients 2024; 16:1556. [PMID: 38892490 PMCID: PMC11173790 DOI: 10.3390/nu16111556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
During the last decades, endocrine-disrupting chemicals (EDCs) have attracted the attention of the scientific community, as a result of a deepened understanding of their effects on human health. These compounds, which can reach populations through the food chain and a number of daily life products, are known to modify the activity of the endocrine system. Regarding vulnerable groups like pregnant mothers, the potential damage they can cause increases their importance, since it is the health of two lives that is at risk. EDCs can affect the gestation process, altering fetal development, and eventually inducing the appearance of many disorders in their childhood and/or adulthood. Because of this, several of these substances have been studied to clarify the influence of their prenatal exposure on the cognitive and psychomotor development of the newborn, together with the appearance of non-communicable diseases and other disorders. The most novel research on the subject has been gathered in this narrative review, with the aim of clarifying the current knowledge on the subject. EDCs have shown, through different studies involving both animal and human investigation, a detrimental effect on the development of children exposed to the during pregnancy, sometimes with sex-specific outcomes. However, some other studies have failed to find these associations, which highlights the need for deeper and more rigorous research, that will provide an even more solid foundation for the establishment of policies against the extended use of these chemicals.
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Affiliation(s)
- Juan M. Toledano
- Department of Physiology, Faculty of Pharmacy, Campus Universitario de Cartuja, University of Granada, 18071 Granada, Spain; (J.M.T.); (J.J.O.); (J.D.-C.)
- Institute of Nutrition and Food Technology “José Mataix Verdú”, University of Granada, 18071 Granada, Spain;
- Nutrition and Food Sciences Ph.D. Program, University of Granada, 18071 Granada, Spain
| | - Maria Puche-Juarez
- Department of Physiology, Faculty of Pharmacy, Campus Universitario de Cartuja, University of Granada, 18071 Granada, Spain; (J.M.T.); (J.J.O.); (J.D.-C.)
- Institute of Nutrition and Food Technology “José Mataix Verdú”, University of Granada, 18071 Granada, Spain;
- Nutrition and Food Sciences Ph.D. Program, University of Granada, 18071 Granada, Spain
| | - Jorge Moreno-Fernandez
- Department of Physiology, Faculty of Pharmacy, Campus Universitario de Cartuja, University of Granada, 18071 Granada, Spain; (J.M.T.); (J.J.O.); (J.D.-C.)
- Institute of Nutrition and Food Technology “José Mataix Verdú”, University of Granada, 18071 Granada, Spain;
- Instituto de Investigación Biosanitaria (IBS), 18016 Granada, Spain;
| | - Patricia Gonzalez-Palacios
- Institute of Nutrition and Food Technology “José Mataix Verdú”, University of Granada, 18071 Granada, Spain;
- Department of Nutrition and Food Science, University of Granada, 18071 Granada, Spain
| | - Ana Rivas
- Instituto de Investigación Biosanitaria (IBS), 18016 Granada, Spain;
- Department of Nutrition and Food Science, University of Granada, 18071 Granada, Spain
| | - Julio J. Ochoa
- Department of Physiology, Faculty of Pharmacy, Campus Universitario de Cartuja, University of Granada, 18071 Granada, Spain; (J.M.T.); (J.J.O.); (J.D.-C.)
- Institute of Nutrition and Food Technology “José Mataix Verdú”, University of Granada, 18071 Granada, Spain;
- Instituto de Investigación Biosanitaria (IBS), 18016 Granada, Spain;
| | - Javier Diaz-Castro
- Department of Physiology, Faculty of Pharmacy, Campus Universitario de Cartuja, University of Granada, 18071 Granada, Spain; (J.M.T.); (J.J.O.); (J.D.-C.)
- Institute of Nutrition and Food Technology “José Mataix Verdú”, University of Granada, 18071 Granada, Spain;
- Instituto de Investigación Biosanitaria (IBS), 18016 Granada, Spain;
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Khalifa M, Fayed RH, Ahmed YH, Sedik AA, El-Dydamony NM, Khalil HMA. Mitigating effect of ferulic acid on di-(2-ethylhexyl) phthalate-induced neurocognitive dysfunction in male rats with a comprehensive in silico survey. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:3493-3512. [PMID: 37966574 PMCID: PMC11074231 DOI: 10.1007/s00210-023-02831-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/30/2023] [Indexed: 11/16/2023]
Abstract
Di-(2-ethylhexyl) phthalate (DEHP) is the most abundant phthalate threatening public health-induced neurotoxicity. This neurotoxicity is associated with behavioral and biochemical deficits in male rats. Our study investigated the neuroprotective effect of ferulic acid (FA) on male rats exposed to DEHP. Thirty-two male Wistar rats were assigned to four groups. Group I control rats received corn oil, group II intoxicated rats received 300 mg/kg of DEHP, group III received 300 mg/kg of DEHP + 50 mg/kg of FA, and group IV received 50 mg/kg of FA, all agents administrated daily per os for 30 days. Anxiety-like behavior, spatial working memory, and recognition memory were assessed. Also, brain oxidative stress biomarkers, including brain malondialdehyde (MDA), reduced glutathione (GSH), nitric oxide (NO), superoxide dismutase (SOD), brain-derived neurotrophic factor (BDNF) as well as heme oxygenase-1 (HO-1) were measured. Moreover, brain histopathology examinations associated with immunohistochemistry determination of brain caspase-3 were also evaluated. Furthermore, docking simulation was adapted to understand the inhibitory role of FA on caspase-3 and NO synthase. Compared to DEHP-intoxicated rats, FA-treated rats displayed improved cognitive memory associated with a reduced anxious state. Also, the redox state was maintained with increased BNDF levels. These changes were confirmed by restoring the normal architecture of brain tissue and a decrement in the immunohistochemistry caspase-3. In conclusion, FA has potent antioxidant and antiapoptotic properties that confirm the neuroprotective activity of FA, with a possible prospect for its therapeutic capabilities and nutritional supplement value.
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Affiliation(s)
- Mhasen Khalifa
- Veterinary Hygiene and Management Department, Faculty of Vet. Medicine, Cairo University, Giza, 12211, Egypt
| | - Rabie H Fayed
- Veterinary Hygiene and Management Department, Faculty of Vet. Medicine, Cairo University, Giza, 12211, Egypt.
| | - Yasmine H Ahmed
- Cytology and Histology Department, Faculty of Vet. Medicine, Cairo University, Giza, 12211, Egypt
| | - Ahmed A Sedik
- Pharmacology Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza, 12622, Egypt
| | - Nehad M El-Dydamony
- Pharmaceutical Chemistry Department, College of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology, 6Th of October City, 12585, Egypt
| | - Heba M A Khalil
- Veterinary Hygiene and Management Department, Faculty of Vet. Medicine, Cairo University, Giza, 12211, Egypt.
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Antoniou EE, Otter R. Phthalate Exposure and Neurotoxicity in Children: A Systematic Review and Meta-analysis. Int J Public Health 2024; 69:1606802. [PMID: 38590582 PMCID: PMC10999525 DOI: 10.3389/ijph.2024.1606802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 02/27/2024] [Indexed: 04/10/2024] Open
Abstract
Objectives: This systematic review aims to assess the relationship between prenatal and childhood exposure to phthalates and neurodevelopmental outcomes, identifying periods of heightened susceptibility. Data sources considered studies examining repeated phthalate exposure during pregnancy and childhood on neurodevelopment. Methods: Evaluation included bias risk and study quality criteria. Evidence was synthesized by groups of low and high phthalate molecular weight and exposure measured prenatally and postnatally and outcome measured in childhood. Beta coefficients and their standard errors were extracted, leading to meta-analyses of various neurodevelopmental outcomes: cognition, motor skills, language, behavior, and temperament. Results: Eleven pregnancy and birth cohort studies were identified as relevant. For each phthalate group and outcome combination, there was low or very low evidence of an association, except for prenatal and postnatal phthalate exposure and behavioral development and postnatal exposure and cognition. Conclusion: The estimated effects sizes were relatively small and strong evidence for periods of heightened susceptibility could not be elucidated. No distinction between phthalates of low molecular weight and those of high molecular weight with regards to the outcomes was found.
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Affiliation(s)
| | - Rainer Otter
- Industrial Petrochemicals Europe, BASF SE, Ludwigshafen, Germany
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6
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Ham D, Ha M, Park H, Hong YC, Kim Y, Ha E, Bae S. Association of postnatal exposure to mixture of bisphenol A, Di-n-butyl phthalate and Di-(2-ethylhexyl) phthalate with Children's IQ at 5 Years of age: Mothers and Children's environmental health (MOCEH) study. CHEMOSPHERE 2024; 347:140626. [PMID: 37939933 DOI: 10.1016/j.chemosphere.2023.140626] [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: 07/03/2023] [Revised: 10/31/2023] [Accepted: 11/03/2023] [Indexed: 11/10/2023]
Abstract
Early childhood is important for neurodevelopment, and exposure to endocrine disruptors such as bisphenol A (BPA) and phthalates in this period may cause neurodevelopmental disorders and delays. The present study examined the association between exposure to mixtures of BPA and three metabolites of phthalates in early childhood and IQ at 5 years of age. The Mother and Children's Environmental Health (MOCEH) study is a prospective birth cohort study conducted in Korea with 1751 pregnant women enrolled from 2006 to 2010. After excluding those without relevant data, 47 children were included in the final analysis. We measured children's urinary concentrations of metabolites of endocrine-disrupting chemicals (Bisphenol A, mono-(2-ethyl-5-oxohexyl) phthalate, mono-(2-ethyl-5-hydroxyhexyl) phthalate and mono-(2-ethyl-5-butyl) phthalate) at ages of 24 and 36 months. We evaluated the children's IQ with the Korean Wechsler Intelligence Test at the age of 5 years. After adjusting for potential confounders, a multiple linear regression was conducted to examine the associations between individual endocrine-disrupting chemicals and the IQ of the children. Weighted Quantile Sum (WQS) regression and quantile-based g-computation were used to assess the association between IQ at age 5 and exposure to mixtures of BPA and phthalates. In the single-chemical analyses, mono-(2-ethyl-5-butyl) phthalate exposure at 36 months was adversely associated with children's IQ (β = -4.93, 95% confidence interval (CI): -9.22, -0.64). In the WQS regression and quantile-based g-computation analyses, exposure to the mixture of BPA and phthalates was associated with lower IQ [β = -9.13 (P-value = 0.05) and β = -9.18 (P-value = 0.05), respectively]. The largest contributor to the overall association was exposure to mono-(2-ethyl-5-butyl) phthalate at 36 months. In the present study, postnatal exposure to mixtures of BPA and three metabolites of phthalates was associated with decreased IQ of children at age 5.
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Affiliation(s)
- Dajeong Ham
- Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
| | - Mina Ha
- Department of Preventive Medicine, College of Medicine, Dankook University, Cheonan, Republic of Korea
| | - Hyesook Park
- Department of Preventive Medicine, College of Medicine, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Yun-Chul Hong
- Department of Preventive Medicine, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Yangho Kim
- Department of Occupational and Environmental Medicine, University of Ulsan College of Medicine, Ulsan, Republic of Korea
| | - Eunhee Ha
- Department of Occupational and Environmental Medicine, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - Sanghyuk Bae
- Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea; Environmental Health Center, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Kang J, Cho SY, Yoon S. Relationship between the use of plastics in refrigerator food storage and urine phthalate metabolites: the Korean National Environmental Health Survey (KoNEHS) cycle 3. Ann Occup Environ Med 2023; 35:e53. [PMID: 38274361 PMCID: PMC10808087 DOI: 10.35371/aoem.2023.35.e53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/30/2023] [Accepted: 12/20/2023] [Indexed: 01/27/2024] Open
Abstract
Background Plastics are high-molecular-weight materials composed of long carbon chains. They are prevalent in daily life, present in various items such as food containers and microwavable packaging. Phthalates, an additive used to enhance their flexibility, are endocrine-disrupting chemicals. We utilized the data from the Korean National Environmental Health Survey (KoNEHS) cycle 3, representing the general South Korean population, to investigate the relationship between the use of plastics in refrigerator food storage and phthalate exposure. Methods We assessed 3,333 adult participants (aged ≥ 19 years) including 1,526 men and 1,807 women, using data from KoNEHS cycle 3. Using the 75th percentile concentration, urine phthalate metabolites were categorized into high and low-concentration groups. χ2 test was conducted to analyze variations in the distribution of each variable, considering sociodemographic factors, health-related factors, food intake, the use of plastics, and the concentration of urine phthalate metabolites as the variables. To calculate odds ratios (ORs) for the high-concentration group of urine phthalate metabolites based on the use of plastics in refrigerator food storage, logistic regression analysis was conducted. Results In men, the use of plastics in refrigerator food storage had significantly higher adjusted ORs compared to those using the others. The adjusted ORs were calculated as follows: mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) had an OR of 1.35 (95% confidence interval [CI]: 1.05-1.72), mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP) had an OR of 1.48 (95% CI: 1.16-1.88), mono-(2-ethyl-5-carboxypentyl) phthalate (MECPP) had an OR of 1.32 (95% CI: 1.04-1.66), ∑di(2-ethylhexyl) phthalate (∑DEHP) had an OR of 1.37 (95% CI: 1.08-1.74) and mono-n-butyl phthalate (MnBP) had an OR of 1.44 (95% CI: 1.13-1.84). Conclusion The concentrations of urine phthalate metabolites (MEHHP, MEOHP, MECPP, ∑DEHP, and MnBP) were significantly higher in men who used plastics in refrigerator food storage compared to those using the others.
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Affiliation(s)
- Jisoo Kang
- Department of Occupational and Environmental Medicine, Soonchunhyang University Gumi Hospital, Gumi, Korea
| | - Seong-yong Cho
- Department of Occupational and Environmental Medicine, Soonchunhyang University Gumi Hospital, Gumi, Korea
| | - Seongyong Yoon
- Department of Occupational and Environmental Medicine, Soonchunhyang University Gumi Hospital, Gumi, Korea
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Shoaff JR, Hahn J, Calafat AM, Korrick SA. Adolescent endocrine disrupting chemical exposure and academic achievement. ENVIRONMENTAL RESEARCH 2023; 234:116493. [PMID: 37390949 DOI: 10.1016/j.envres.2023.116493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 05/30/2023] [Accepted: 06/22/2023] [Indexed: 07/02/2023]
Abstract
BACKGROUND Epidemiologic studies support associations of exposure to endocrine disrupting chemicals (EDCs), such as some phthalates, phenols, and parabens with a wide range of cognitive and behavioral traits. While many of these traits are associated with academic achievement, the relationship of EDC exposure specifically with academic achievement in adolescence has not yet been studied. OBJECTIVE We assessed the association of urinary biomarker concentrations of EDCs with academic achievement in adolescents as well as the potential for psychosocial factors to modify associations. METHODS We quantified urinary concentrations of select EDCs in 205 adolescent participants from the New Bedford Cohort (NBC), a prospective birth cohort of children born to mothers residing near the New Bedford Harbor Superfund site in Massachusetts, and estimated associations between EDCs and adolescent academic achievement assessed with the Wide Range Achievement Test (WRAT). Measures of socioeconomic status and the home environment were used to estimate psychosocial stress. RESULTS Urinary concentrations of antiandrogenic phthalates were inversely associated with Math Computation scores. For example, each doubling of the concentration of antiandrogenic phthalate metabolites in urine was associated with a 1.94 point decrease (95% CI: 3.84, -0.05) in Math Computation scores, indicating poorer performance. For the most part, associations were stronger in adolescents with more, as compared to less, social disadvantage, but most of these differences did not achieve statistical significance. CONCLUSION Our findings support the potential for adolescents' exposure to antiandrogenic phthalates to correlate with poorer academic achievement in math, particularly among participants with greater psychosocial stress.
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Affiliation(s)
- Jessica R Shoaff
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
| | - Jill Hahn
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Antonia M Calafat
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Susan A Korrick
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
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Yang AM, Lai TS, Lin YL, Wang C, Lin CY. Urinary di-(2-ethylhexyl) phthalate metabolites are independently related to serum neurofilament light chain, a biomarker of neurological diseases, in adults: results from NHANES 2013-2014. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:66417-66425. [PMID: 37097562 DOI: 10.1007/s11356-023-26943-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 04/07/2023] [Indexed: 05/17/2023]
Abstract
Di (2-ethylhexyl) phthalate (DEHP) is a chemical commonly used in the manufacturing of plastics and can pose human health risks, including endocrine disruption, reproductive toxicity, and potential carcinogenic effects. Children may be particularly vulnerable to the harmful effects of DEHP. Early exposure to DEHP has been linked to potential behavioral and learning problems. However, there are no reports to date on whether DEHP exposure in adulthood has neurotoxic effects. Serum neurofilament light chain (NfL), a protein released into the blood after neuroaxonal damage, has been shown to be a reliable biomarker for many neurological diseases. To date, no study has examined the relationship between DEHP exposure and NfL. For the present study, we selected 619 adults (aged ≥ 20 years) from the 2013-2014 National Health and Nutrition Examination Survey (NHANES) to examine the association between urinary DEHP metabolites and serum NfL. We reported higher urinary levels of ln-mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), ln-mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), and ln-mono(2-ethyl-5-carboxypentyl) phthalate (MECPP), and ln-ΣDEHP levels were associated with higher serum levels of ln-NfL (ΣDEHP: β-coefficient = 0. 075; S.E. = 0.026; P = 0.011). When we divided ΣDEHP into quartiles, mean NfL concentrations increased with quartiles of MEHHP (P for trend = 0.023). The association was more pronounced in males, non-Hispanic white race, higher income, and BMI < 25. In conclusion, higher DEHP exposure was positively associated with higher serum NfL in adults from NHANES 2013-2014. If this finding is causal, it is possible that DEHP exposure in adulthood may also induce neurological damage. Although the causality of this observation and the clinical significance are uncertain, our findings suggest that additional research is needed on DEHP exposure, serum NfL, and neurological disease in adults.
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Affiliation(s)
- An-Ming Yang
- Department of Internal Medicine, En Chu Kong Hospital, No. 399, Fuxing Rd., Sanxia Dist., New Taipei City, 237, Taiwan
- Department of Healthcare Management, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan
| | - Tai-Shuan Lai
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, 100, Taiwan
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, 100, Taiwan
| | - Yu-Ling Lin
- Department of Healthcare Management, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan
- Department of Nephrology, Hsinchu Cathay General Hospital, Hsinchu, 300, Taiwan
| | - ChiKang Wang
- Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan
| | - Chien-Yu Lin
- Department of Internal Medicine, En Chu Kong Hospital, No. 399, Fuxing Rd., Sanxia Dist., New Taipei City, 237, Taiwan.
- Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan.
- School of Medicine, Fu Jen Catholic University, New Taipei City, 242, Taiwan.
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Mathew L, Snyder NW, Lyall K, Lee BK, McClure LA, Elliott AJ, Newschaffer CJ. The associations between prenatal phthalate exposure measured in child meconium and cognitive functioning of 12-month-old children in two cohorts at elevated risk for adverse neurodevelopment. ENVIRONMENTAL RESEARCH 2022; 214:113928. [PMID: 35870502 PMCID: PMC9890962 DOI: 10.1016/j.envres.2022.113928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 06/17/2022] [Accepted: 07/15/2022] [Indexed: 05/23/2023]
Abstract
BACKGROUND Phthalate metabolites in gestational-maternal urine represents short-term maternal exposure, but meconium, the newborn's first stool may better capture cumulative fetal exposure. We quantified phthalate metabolites in meconium from two cohorts of children at higher risk of adverse neurodevelopment and evaluated associations with their cognitive function at 12 months. METHODS Meconium phthalate metabolites were quantified in the Safe Passage Study (SPS), N = 720, a pregnancy cohort with high community-levels of prenatal alcohol use, and the Early Autism Risk Longitudinal Investigation (EARLI), N = 236, a high familial autism risk pregnancy cohort. EARLI also had second and third trimester (T2/T3) maternal urine for exposure assessment. Molar sum of di (2-ethylhexyl) (∑DEHP) metabolites and an anti-androgenic score (AAS) using mono-isobutyl, mono-n-butyl, monobenzyl (MBZP), and DEHP metabolites were computed. Cognitive function was assessed at 12 months using the Mullen Scales of Early Learning-Composite (ELC). Multivariable linear regression assessed associations between loge-transformed metabolites and ELC. Quadratic terms explored nonlinearity and interaction terms of metabolite by child's sex examined effect modification. RESULTS In SPS, MBzP (βLinear = -6.73; 95% CI: 12.04, -1.42; βquadratic = 1.95; 0.27, 3.62) and mono (2-ethyl-5-carboxypentyl), (βLinear = -3.81; -7.53, -0.27; βquadratic = 0.93; 0.09, 1.77) had U-shaped associations with ELC. In EARLI, T2 urine mono-carboxyisononyl was associated with linear decrease in ELC, indicating lower cognitive function. Interaction with sex was suggested (P < 0.2) for several urine metabolites, mostly indicating negative association between phthalates and ELC among girls but reversed among boys. Only mono-isononyl phthalate and ∑DEHP had consistent main effect associations across matrixes and cohorts, but similar interaction with sex was observed for meconium-measured ∑DEHP, AAS, MBzP, and mono (2-ethylhexyl) in both cohorts. CONCLUSIONS Few phthalate metabolites were consistently associated with children's cognitive function, but a similar set of meconium metabolites from both cohorts displayed sex-specific associations. Gestational phthalate exposure may have sexually-dimorphic associations with early cognitive function in children at higher risk for adverse neurodevelopment.
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Affiliation(s)
- Leny Mathew
- AJ Drexel Autism Institute, Drexel University, 3020 Market St, Suite 560, Philadelphia, PA, 19104, USA; Department of Epidemiology and Biostatistics, Drexel University Dornsife School of Public Health, 3215 Market Street, Philadelphia, PA, 19104, USA.
| | - Nathaniel W Snyder
- AJ Drexel Autism Institute, Drexel University, 3020 Market St, Suite 560, Philadelphia, PA, 19104, USA
| | - Kristen Lyall
- AJ Drexel Autism Institute, Drexel University, 3020 Market St, Suite 560, Philadelphia, PA, 19104, USA
| | - Brian K Lee
- Department of Epidemiology and Biostatistics, Drexel University Dornsife School of Public Health, 3215 Market Street, Philadelphia, PA, 19104, USA
| | - Leslie A McClure
- Department of Epidemiology and Biostatistics, Drexel University Dornsife School of Public Health, 3215 Market Street, Philadelphia, PA, 19104, USA
| | | | - Craig J Newschaffer
- AJ Drexel Autism Institute, Drexel University, 3020 Market St, Suite 560, Philadelphia, PA, 19104, USA; College of Health and Human Development, Pennsylvania State University, 325 HHD Building, University Park, PA, 16802, USA
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11
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Rosolen V, Giordani E, Mariuz M, Parpinel M, Ronfani L, Vecchi Brumatti L, Bin M, Calamandrei G, Mustieles V, Gilles L, Govarts E, Baken K, Rodriguez Martin L, Schoeters G, Sepai O, Sovcikova E, Fabelova L, Šidlovská M, Kolena B, Kold Jensen T, Frederiksen H, Kolossa-Gehring M, Lange R, Apel P, Castano A, Esteban López M, Jacobs G, Voorspoels S, Jurdáková H, Górová R, Barbone F. Concurrent Assessment of Phthalates/HEXAMOLL ® DINCH Exposure and Wechsler Intelligence Scale for Children Performance in Three European Cohorts of the HBM4EU Aligned Studies. TOXICS 2022; 10:538. [PMID: 36136503 PMCID: PMC9502751 DOI: 10.3390/toxics10090538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/31/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Information about the effects of phthalates and non-phthalate substitute cyclohexane-1,2-dicarboxylic acid diisononyl ester (HEXAMOLL® DINCH) on children's neurodevelopment is limited. The aim of the present research is to evaluate the association between phthalate/HEXAMOLL® DINCH exposure and child neurodevelopment in three European cohorts involved in HBM4EU Aligned Studies. Participating subjects were school-aged children belonging to the Northern Adriatic cohort II (NAC-II), Italy, Odense Child Cohort (OCC), Denmark, and PCB cohort, Slovakia. In each cohort, children's neurodevelopment was assessed through the Full-Scale Intelligence Quotient score (FSIQ) of the Wechsler Intelligence Scale of Children test using three different editions. The children's urine samples, collected for one point in time concurrently with the neurodevelopmental evaluation, were analyzed for several phthalates/HEXAMOLL® DINCH biomarkers. The relation between phthalates/HEXAMOLL® DINCH and FSIQ was explored by applying separate multiple linear regressions in each cohort. The means and standard deviations of FSIQ were 109 ± 11 (NAC-II), 98 ± 12 (OCC), and 81 ± 15 (PCB cohort). In NAC-II, direct associations between FSIQ and DEHP's biomarkers were found: 5OH-MEHP+5oxo-MEHP (β = 2.56; 95% CI 0.58-4.55; N = 270), 5OH-MEHP+5cx-MEPP (β = 2.48; 95% CI 0.47-4.49; N = 270) and 5OH-MEHP (β = 2.58; 95% CI 0.65-4.51; N = 270). On the contrary, in the OCC the relation between DEHP's biomarkers and FSIQ tended to be inverse but imprecise (p-value ≥ 0.10). No associations were found in the PCB cohort. FSIQ was not associated with HEXAMOLL® DINCH in any cohort. In conclusion, these results do not provide evidence of an association between concurrent phthalate/DINCHHEXAMOLLR DINCH exposure and IQ in children.
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Affiliation(s)
- Valentina Rosolen
- Institute for Maternal and Child Health, IRCCS “Burlo Garofolo”, Via dell’Istria 65/1, 34137 Trieste, Italy
| | - Elisa Giordani
- Department of Medicine—DAME, University of Udine, Via Colugna 50, 33100 Udine, Italy
| | - Marika Mariuz
- Department of Medicine—DAME, University of Udine, Via Colugna 50, 33100 Udine, Italy
| | - Maria Parpinel
- Department of Medicine—DAME, University of Udine, Via Colugna 50, 33100 Udine, Italy
| | - Luca Ronfani
- Institute for Maternal and Child Health, IRCCS “Burlo Garofolo”, Via dell’Istria 65/1, 34137 Trieste, Italy
| | - Liza Vecchi Brumatti
- Institute for Maternal and Child Health, IRCCS “Burlo Garofolo”, Via dell’Istria 65/1, 34137 Trieste, Italy
| | - Maura Bin
- Institute for Maternal and Child Health, IRCCS “Burlo Garofolo”, Via dell’Istria 65/1, 34137 Trieste, Italy
| | - Gemma Calamandrei
- Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - Vicente Mustieles
- Center for Biomedical Research, University of Granada, 18011 Granada, Spain
- Instituto de Investigación Biosanitaria de Granada, 18012 Granada, Spain
- Consortium for Biomedical Research in Epidemiology and Public Health, 28029 Madrid, Spain
| | - Liese Gilles
- VITO Health, Flemish Institute for Technological Research (VITO), 2400 Mol, Belgium
| | - Eva Govarts
- VITO Health, Flemish Institute for Technological Research (VITO), 2400 Mol, Belgium
| | - Kirsten Baken
- VITO Health, Flemish Institute for Technological Research (VITO), 2400 Mol, Belgium
| | | | - Greet Schoeters
- VITO Health, Flemish Institute for Technological Research (VITO), 2400 Mol, Belgium
| | | | - Eva Sovcikova
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University, 83303 Bratislava, Slovakia
| | - Lucia Fabelova
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University, 83303 Bratislava, Slovakia
| | - Miroslava Šidlovská
- Department of Zoology and Anthropology, Faculty of Natural Sciences and Informatics, Constantine the Philosopher University in Nitra, Nabrezie mladeze 91, 94974 Nitra, Slovakia
| | - Branislav Kolena
- Department of Zoology and Anthropology, Faculty of Natural Sciences and Informatics, Constantine the Philosopher University in Nitra, Nabrezie mladeze 91, 94974 Nitra, Slovakia
| | - Tina Kold Jensen
- Department of Clinical Pharmacology, Pharmacy and Environmental Medicine, Institute of Public Health, University of Southern Denmark, 5000 Odense, Denmark
| | - Hanne Frederiksen
- Department of Growth and Reproduction, Copenhagen University Hospital-Rigshospitalet, 2100 Copenhagen, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital-Rigshospitalet, 2100 Copenhagen, Denmark
| | | | - Rosa Lange
- German Environment Agency (UBA), Corrensplatz 1, 14195 Berlin, Germany
| | - Petra Apel
- German Environment Agency (UBA), Corrensplatz 1, 14195 Berlin, Germany
| | - Argelia Castano
- National Centre for Environmental Health, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Marta Esteban López
- National Centre for Environmental Health, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Griet Jacobs
- Unit Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
| | - Stefan Voorspoels
- Unit Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
| | - Helena Jurdáková
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Mlynská Dolina, 84215 Bratislava, Slovakia
| | - Renáta Górová
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Mlynská Dolina, 84215 Bratislava, Slovakia
| | - Fabio Barbone
- Department of Medicine—DAME, University of Udine, Via Colugna 50, 33100 Udine, Italy
- Institute of Hygiene and Clinical Epidemiology, Azienda Sanitaria Universitaria Friuli Centrale, Via Colugna 50, 33100 Udine, Italy
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12
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Does early life phthalate exposure mediate racial disparities in children’s cognitive abilities? Environ Epidemiol 2022; 6:e205. [PMID: 35434463 PMCID: PMC9005259 DOI: 10.1097/ee9.0000000000000205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 03/01/2022] [Indexed: 11/25/2022] Open
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13
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Lv J, Li Y, Chen J, Li R, Bao C, Ding Z, Ren W, Du Z, Wang S, Huang Y, Wang QN. Maternal exposure to bis(2-ethylhexyl) phthalate during the thyroid hormone-dependent stage induces persistent emotional and cognitive impairment in middle-aged offspring mice. Food Chem Toxicol 2022; 163:112967. [PMID: 35354077 DOI: 10.1016/j.fct.2022.112967] [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: 09/01/2021] [Revised: 03/10/2022] [Accepted: 03/24/2022] [Indexed: 10/18/2022]
Abstract
Prenatal DEHP exposure can cause offspring neurodevelopmental toxicity, but the persistent effects of such exposure window are unclear. This study aimed to investigate the lasting neurobehavioral impact of DEHP on offspring following early exposure from GD9.5 (fetal neural tube closure) to GD16.5 (fetal thyroxin, TH, synthesis). Data showed maternal exposure to DEHP during the thyroid hormone-dependent stage induced a range of neurobehavioral phenotypic changes in adult and middle-aged mice, including anxiety, depression and cognitive impairment. Significant reductions in free TH, TH transporters, and TH metabolic enzyme deiodinase II (D2) were observed in the fetal brain, whereas D3 was elevated, indicating that TH signaling disruption was caused by in utero exposure. Gene expression analyses suggested the expression levels of the TH receptors Trα1, Trβ1 and their downstream target, brain-derived neurotrophic factor, were significantly attenuated, which may partially explain the mechanisms of neurodevelopmental impairment. This study provides new evidence of the persistent effects of sex-specific neurodevelopmental impairment due to in utero DEHP exposure, possibly through damage to the fetal brain TH signaling systems that causes lifelong brain damage. These results further suggest a profound neurobehavioral toxicity of DEHP that may be programmed during early developmental stage exposure and manifested later in life.
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Affiliation(s)
- Jia Lv
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China
| | - Yanling Li
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China
| | - Jianrong Chen
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China
| | - Rong Li
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China
| | - Chao Bao
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China
| | - Zheng Ding
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China
| | - Wenqiang Ren
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China
| | - Zhiping Du
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; Jinhua Center for Disease Control and Prevention, Jinhua, Zhejiang, China
| | - Sheng Wang
- Center for Scientific Research of Anhui Medical University, Hefei, China
| | - Yichao Huang
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China.
| | - Qu-Nan Wang
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China.
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14
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Ramírez V, Gálvez-Ontiveros Y, González-Domenech PJ, Baca MÁ, Rodrigo L, Rivas A. Role of endocrine disrupting chemicals in children's neurodevelopment. ENVIRONMENTAL RESEARCH 2022; 203:111890. [PMID: 34418446 DOI: 10.1016/j.envres.2021.111890] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/08/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
Environmental stressors, like endocrine disrupting chemicals (EDC), are considered important contributors to the increased rates of neurodevelopmental dysfunctions. Considering the cumulative research on adverse neurodevelopmental effects associated with prenatal exposure to EDC, the purpose of this study was to review the available limited literature about the effects of postnatal exposure to EDC on child neurodevelopment and behaviour. Despite widespread children's exposure to EDC, there are a limited number of epidemiological studies on the association of this exposure with neurodevelopmental disorders, in particular in the postnatal period. The available research suggests that postnatal EDC exposure is related to adverse neurobehavioral outcomes in children; however the underlying mechanisms of action remain unclear. Timing of exposure is a key factor determining potential neurodevelopmental consequences, hence studying the impact of multiple EDC co-exposure in different vulnerable life periods could guide the identification of sensitive subpopulations. Most of the reviewed studies did not take into account sex differences in the EDC effects on children neurodevelopment. We believe that the inclusion of sex in the study design should be considered as the role of EDC on children neurodevelopment are likely sex-specific and should be taken into consideration when determining susceptibility and potential mechanisms of action.
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Affiliation(s)
- Viviana Ramírez
- Department of Nutrition and Food Science, University of Granada, Granada, Spain
| | - Yolanda Gálvez-Ontiveros
- Department of Nutrition and Food Science, University of Granada, Granada, Spain; Instituto de Investigación Biosanitaria ibs. GRANADA, Granada, Spain
| | - Pablo José González-Domenech
- Instituto de Investigación Biosanitaria ibs. GRANADA, Granada, Spain; Department of Psychiatry, University of Granada, Granada, Spain
| | | | - Lourdes Rodrigo
- Department of Legal Medicine and Toxicology, University of Granada, Granada, Spain.
| | - Ana Rivas
- Department of Nutrition and Food Science, University of Granada, Granada, Spain; Instituto de Investigación Biosanitaria ibs. GRANADA, Granada, Spain
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15
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Sprowles JL, Dzwilewski KL, Merced-Nieves FM, Musaad SM, Schantz SL, Geiger SD. Associations of prenatal phthalate exposure with neurobehavioral outcomes in 4.5- and 7.5-month-old infants. Neurotoxicol Teratol 2022; 92:107102. [PMID: 35588931 PMCID: PMC9271634 DOI: 10.1016/j.ntt.2022.107102] [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: 08/20/2021] [Revised: 05/05/2022] [Accepted: 05/12/2022] [Indexed: 01/25/2023]
Abstract
Phthalates are ubiquitous endocrine-disrupting chemicals, and research indicates that prenatal exposure to some phthalates may affect neurodevelopment. In a prospective birth cohort study, five first-morning urine samples collected across pregnancy were pooled and the following phthalate biomarkers assessed: sum of di-(2-ethylhexyl) phthalate metabolites (ΣDEHP), sum of diisononyl phthalate metabolites (ΣDINP), sum of dibutyl phthalate metabolites (ΣDBP), sum of anti-androgenic metabolites (ΣAA), monoethyl phthalate (MEP), and sum of all phthalate metabolites (ΣAll). The Ages & Stages Questionnaires® (ASQ), a standardized parent-reported, age-adapted screening tool, measured communication, personal-social, problem solving, and motor domains in infants at 4.5 and 7.5 months (n = 123). Adjusting for maternal age, annual household income, gestational age at birth, infant age at assessment, and sex, repeated-measures generalized linear regression models were used to examine associations between prenatal phthalate urine biomarker concentrations and domain scores (assuming a Poisson distribution). Beta estimates were exponentiated back to the domain scale for ease of interpretation. Mothers were mostly white and college-educated, and most reported an annual household income of ≥$60,000. Associations of phthalate concentrations with ASQ outcomes are presented as follows: (1) anti-androgenic phthalate metabolites (ΣDEHP, ΣDINP, ΣDBP, and ΣAA), (2) MEP, which is not anti-androgenic, and (3) ΣAll. Overall, anti-androgenic phthalates were associated with higher (i.e., better) scores. However, there were exceptions, including the finding that a one-unit increase in ΣDBP was associated with a 12% increase in problem solving scores in 4.5-month-old females (β = 1.12; 95% CI: 0.99, 1.28; p = 0.067) but a 85% decrease for 7.5-month-old females (β = 0.54; 95% CI: 0.3, 0.99; p = 0.047). In contrast, MEP was associated with poorer scores on several outcomes. Sex- and timepoint-specific estimates demonstrated a one-unit increase in MEP was associated with: a 52% decrease in personal-social scores in 7.5-month-old males (β = 0.66; 95% CI: 0.46, 0.95; p = 0.02), a 39% decrease in fine motor scores in 7.5-month-old males (β = 0.72; 95% CI: 0.52, 0.98; p = 0.035), and a 6% decrease in fine motor scores in 4.5-month-old females (β = 0.94; 95% CI: 0.88, 0.99; p = 0.03). A one-unit increase in ΣAll was associated with a 4% increase in personal-social scores in 4.5-month-old males (β = 1.04; 95% CI: 0.99, 1.1; p = 0.08) but a 17% decrease in 7.5-month-old males (β = 0.85; 95% CI: 0.73, 0.99; p = 0.03). These data suggest age- and sex-specific associations of prenatal phthalates with infant neurobehavior. The current findings should be confirmed by longitudinal studies with larger sample sizes.
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Affiliation(s)
- Jenna L.N. Sprowles
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, 405 N. Matthews Ave., Urbana, IL 61801, USA.,Corresponding author at: Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, 405 N. Matthews Ave., Urbana, IL 61801, USA. (J. L. N. Sprowles)
| | - Kelsey L.C. Dzwilewski
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, 405 N. Matthews Ave., Urbana, IL 61801, USA
| | - Francheska M. Merced-Nieves
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA
| | - Salma M.A. Musaad
- United States Department of Agriculture/Agricultural Research Service, Children’s Nutrition Research Center, Baylor College of Medicine, 1100 Bates Ave., Houston, TX 77030, USA
| | - Susan L. Schantz
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, 405 N. Matthews Ave., Urbana, IL 61801, USA
| | - Sarah D. Geiger
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, 405 N. Matthews Ave., Urbana, IL 61801, USA.,Department of Kinesiology and Community Health, University of Illinois Urbana-Champaign, Khan Annex Room 2013, 1206 S. Fourth St., Champaign, IL 61820, USA
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16
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Kim JI, Lee J, Lee KS, Lee YA, Shin CH, Hong YC, Kim BN, Lim YH. Association of phthalate exposure with autistic traits in children. ENVIRONMENT INTERNATIONAL 2021; 157:106775. [PMID: 34314979 DOI: 10.1016/j.envint.2021.106775] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/08/2021] [Accepted: 07/12/2021] [Indexed: 05/23/2023]
Abstract
BACKGROUND Phthalates are synthetic chemicals with endocrine-disrupting properties. They are reportedly associated with various neurotoxic outcomes. Studies on exposure to phthalates and children's autistic traits have shown inconsistent results with respect to sex and susceptible time periods. We investigated the association of phthalate exposure during the prenatal period and childhood with autistic traits over time using a birth cohort in South Korea. METHODS Five phthalate metabolites were measured during mid-term pregnancy and children's follow-up at ages of 4, 6, and 8 years among a total of 547 mother-child pairs. The social communication questionnaire (SCQ) was used to assess autistic traits of children at each time point. The relationship between phthalate metabolites and SCQ scores were analyzed by exposure windows and sex. RESULTS A 2.7 fold increase in di-(2-ethylhexyl) phthalate metabolite levels, mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) and mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP) during pregnancy was associated with increased SCQ scores at 4 years by 8.5% (95% confidence intervals [CI]: 1.9%, 15.5%) and 7.4% (95% CI: 0.3%, 15.0%), respectively, but not at the age of 6 or 8 years. Moreover, MEHHP levels at ages of 4 and 8 years were associated with increased SCQ scores at 8 years by 9.9% (95% CI: 1.8%, 18.6%) and 9.6% (95% CI: 1.3%, 18.6%), respectively. Boys showed stronger associations between phthalate exposure and SCQ scores than girls. CONCLUSION The study suggested different susceptible time windows of phthalate exposure: exposure during pregnancy is associated with autistic traits in young children, whereas exposure during early childhood years leads to autistic traits in school-aged children, particularly boys.
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Affiliation(s)
- Johanna Inhyang Kim
- Department of Psychiatry, Hanyang University Medical Center, Seoul, Republic of Korea
| | - Jung Lee
- Integrative Care Hub, Children's Hospital, Seoul National University Hospital, Seoul, Republic of Korea
| | - Kyung-Shin Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Young Ah Lee
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Choong Ho Shin
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, South Korea
| | - Bung-Nyun Kim
- Division of Children and Adolescent Psychiatry, Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Youn-Hee Lim
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.
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17
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Chang WH, Herianto S, Lee CC, Hung H, Chen HL. The effects of phthalate ester exposure on human health: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 786:147371. [PMID: 33965815 DOI: 10.1016/j.scitotenv.2021.147371] [Citation(s) in RCA: 122] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 05/26/2023]
Abstract
Phthalate esters (PAEs) are one of the most widely used plasticizers in polymer products and humans are increasingly exposed to them. The constant exposure to PAEs-contained products has raised some concerns against human health. Thus, the impacts of PAEs and their metabolites on human health require a comprehensive study for a better understanding of the associated risks. Here, we attempt to review eight main health effects of PAE exposure according to the most up-to-date studies. We found that epidemiological studies demonstrated a consistent association between PAE exposure (especially DEHP and its metabolites) and a decrease in sperm quality in males and symptom development of ADHD in children. Overall, we found insufficient evidence and lack of consistency of the association between PAE exposure and cardiovascular diseases (hypertension, atherosclerosis, and CHD), thyroid diseases, respiratory diseases, diabetes, obesity, kidney diseases, intelligence performance in children, and other reproductive system-related diseases (anogenital distance, girl precocious puberty, and endometriosis). Future studies (longitudinal and follow-up investigations) need to thoroughly perform in large-scale populations to yield more consistent and powerful results and increase the precision of the association as well as enhance the overall understanding of potential human health risks of PAEs in long-term exposure.
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Affiliation(s)
- Wei-Hsiang Chang
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Research Center of Environmental Trace Toxic Substances, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Samuel Herianto
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program (TIGP), Academia Sinica, Taipei 11529, Taiwan; Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan; Department of Chemistry (Chemical Biology Division), College of Science, National Taiwan University, Taipei 10617, Taiwan
| | - Ching-Chang Lee
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Research Center of Environmental Trace Toxic Substances, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hsin Hung
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hsiu-Ling Chen
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Research Center of Environmental Trace Toxic Substances, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
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Nidens N, Vogel M, Körner A, Kiess W. Prenatal exposure to phthalate esters and its impact on child development. Best Pract Res Clin Endocrinol Metab 2021; 35:101478. [PMID: 33608224 DOI: 10.1016/j.beem.2020.101478] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Endocrine disruptive chemicals (EDCs) cause adverse health effects through interaction with endocrine systems. They are classified by chemical structure, effects on specific endocrine systems, their bioaccumulation and/or persistence in the environment, and/or clinically observable effects. In industrial nations, people are exposed to complex mixtures of many different substances all of which may have multiple and deleterious effects upon the individual. The clinical importance of epigenetic changes caused by the action of EDCs during vulnerable phases of development is currently unclear but of particular relevance. Epidemiological studies are criticized because reproducibility is not always guaranteed. Nevertheless, they remain the method of choice for the development and analysis of suitable model systems. Positive associations, despite of sometimes conflicting results, are the key in the selection of factors that can then be analyzed in model systems in an unbiased way. This article reports EDC-caused effects in the fields of growth and metabolism, neurocognitive development and sexual development and reproduction focusing mainly on phthalates and their metabolites. However, research will have to focus on the interactions of different EDCs and their consequences of prenatal and early life exposure.
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Affiliation(s)
- Nathalie Nidens
- Leipzig Research Center for Civilization Diseases (LIFE), LIFE Child, University of Leipzig, Faculty of Medicine, Philipp-Rosenthal-Straße 27, D-04103, Leipzig, Germany; Hospital for Children and Adolescents, Center for Paediatric Research, Liebigstraße 20a, D-04103, Leipzig, Germany
| | - Mandy Vogel
- Leipzig Research Center for Civilization Diseases (LIFE), LIFE Child, University of Leipzig, Faculty of Medicine, Philipp-Rosenthal-Straße 27, D-04103, Leipzig, Germany; Hospital for Children and Adolescents, Center for Paediatric Research, Liebigstraße 20a, D-04103, Leipzig, Germany
| | - Antje Körner
- Leipzig Research Center for Civilization Diseases (LIFE), LIFE Child, University of Leipzig, Faculty of Medicine, Philipp-Rosenthal-Straße 27, D-04103, Leipzig, Germany; Hospital for Children and Adolescents, Center for Paediatric Research, Liebigstraße 20a, D-04103, Leipzig, Germany
| | - Wieland Kiess
- Leipzig Research Center for Civilization Diseases (LIFE), LIFE Child, University of Leipzig, Faculty of Medicine, Philipp-Rosenthal-Straße 27, D-04103, Leipzig, Germany; Hospital for Children and Adolescents, Center for Paediatric Research, Liebigstraße 20a, D-04103, Leipzig, Germany.
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Gestational Phthalate Exposure and Preschool Attention Deficit Hyperactivity Disorder in Norway. ENVIRONMENTAL EPIDEMIOLOGY (PHILADELPHIA, PA.) 2021; 5:e161. [PMID: 34414345 PMCID: PMC8367074 DOI: 10.1097/ee9.0000000000000161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 06/01/2021] [Indexed: 11/26/2022]
Abstract
Supplemental Digital Content is available in the text. Prenatal phthalate exposure has been linked to altered neurobehavioral development in both animal models and epidemiologic studies, but whether or not these associations translate to increased risk of neurodevelopmental disorders is unclear. We used a nested case-cohort study design to assess whether maternal urinary concentrations of 12 phthalate metabolites at 17 weeks gestation were associated with criteria for Attention Deficit Hyperactivity Disorder (ADHD) classified among 3-year-old children in the Norwegian Mother, Father and Child Cohort Study (MoBa). Between 2007 and 2011, 260 children in this substudy were classified with ADHD using a standardized, on-site clinical assessment; they were compared with 549 population-based controls. We modeled phthalate levels both linearly and by quintiles in logistic regression models adjusted for relevant covariates and tested for interaction by child sex. Children of mothers in the highest quintile of di-iso-nonyl phthalate (∑DiNP) metabolite levels had 1.70 times the odds of being classified with ADHD compared with those in the lowest quintile (95% confidence interval [CI] = 1.03 to 2.82). In linear models, there was a trend with the sum of di-2-ethylhexyl phthalate metabolites (∑DEHP); each natural log-unit increase in concentration was associated with 1.22 times the odds of ADHD (95% CI = 0.99 to 1.52). In boys, but not girls, mono-n-butyl phthalate exposure was associated with increased odds of ADHD (odds ratio [OR] 1.42; 95% CI = 1.07 to 1.88). Additional adjustment for correlated phthalate metabolites attenuated estimates. These results suggest gestational phthalate exposure may impact the behavior of children as young as 3 years.
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Lee KS, Choi YJ, Cho JW, Moon SJ, Lim YH, Kim JI, Lee YA, Shin CH, Kim BN, Hong YC. Children's Greenness Exposure and IQ-Associated DNA Methylation: A Prospective Cohort Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:7429. [PMID: 34299878 PMCID: PMC8304819 DOI: 10.3390/ijerph18147429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/29/2021] [Accepted: 07/05/2021] [Indexed: 12/11/2022]
Abstract
Epigenetics is known to be involved in regulatory pathways through which greenness exposure influences child development and health. We aimed to investigate the associations between residential surrounding greenness and DNA methylation changes in children, and further assessed the association between DNA methylation and children's intelligence quotient (IQ) in a prospective cohort study. We identified cytosine-guanine dinucleotide sites (CpGs) associated with cognitive abilities from epigenome- and genome-wide association studies through a systematic literature review for candidate gene analysis. We estimated the residential surrounding greenness at age 2 using a geographic information system. DNA methylation was analyzed from whole blood using the HumanMethylationEPIC array in 59 children at age 2. We analyzed the association between greenness exposure and DNA methylation at age 2 at the selected CpGs using multivariable linear regression. We further investigated the relationship between DNA methylation and children's IQ. We identified 8743 CpGs associated with cognitive ability based on the literature review. Among these CpGs, we found that 25 CpGs were significantly associated with greenness exposure at age 2, including cg26269038 (Bonferroni-corrected p ≤ 0.05) located in the body of SLC6A3, which encodes a dopamine transporter. DNA methylation at cg26269038 at age 2 was significantly associated with children's performance IQ at age 6. Exposure to surrounding greenness was associated with cognitive ability-related DNA methylation changes, which was also associated with children's IQ. Further studies are warranted to clarify the epigenetic pathways linking greenness exposure and neurocognitive function.
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Affiliation(s)
- Kyung-Shin Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul 03080, Korea; (K.-S.L.); (Y.-J.C.); (S.-J.M.); (Y.-H.L.)
- Environmental Health Center, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Yoon-Jung Choi
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul 03080, Korea; (K.-S.L.); (Y.-J.C.); (S.-J.M.); (Y.-H.L.)
- Environmental Health Center, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Jin-Woo Cho
- Department of Statistics, University of Pittsburgh, Pittsburgh, PA 15260, USA;
| | - Sung-Ji Moon
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul 03080, Korea; (K.-S.L.); (Y.-J.C.); (S.-J.M.); (Y.-H.L.)
| | - Youn-Hee Lim
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul 03080, Korea; (K.-S.L.); (Y.-J.C.); (S.-J.M.); (Y.-H.L.)
- Section of Environmental Health, Department of Public Health, University of Copenhagen, 1014 Copenhagen, Denmark
| | - Johanna-Inhyang Kim
- Department of Psychiatry, Hanyang University Medical Center, Seoul 04763, Korea;
| | - Young-Ah Lee
- Department of Pediatrics, Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-A.L.); (C.-H.S.)
| | - Choong-Ho Shin
- Department of Pediatrics, Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-A.L.); (C.-H.S.)
| | - Bung-Nyun Kim
- Division of Children and Adolescent Psychiatry, Department of Psychiatry, Seoul National University Hospital, Seoul 03080, Korea
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul 03080, Korea; (K.-S.L.); (Y.-J.C.); (S.-J.M.); (Y.-H.L.)
- Environmental Health Center, Seoul National University College of Medicine, Seoul 03080, Korea
- Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul 03080, Korea
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21
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Lee KS, Kim JI, Choi YJ, Cho J, Lim YH, Kim BN, Shin CH, Lee YA, Hong YC. Association Between Sleep Duration and Intelligence Quotient in 6-Year-Old Children. Int J Behav Med 2021; 29:57-68. [PMID: 34080127 DOI: 10.1007/s12529-021-09996-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND Sufficient sleep during childhood is important for cognitive functions such as learning and successful school performance. This study aimed to investigate the effects of sleep duration on the intelligence quotient (IQ) of 6-year-old children and aimed to analyze whether these effects differed by sex. METHODS The IQ of 538 6-year-old Korean participants from the cohort study, "The Environment and Development of Children," was measured during follow-up using the Korean Educational Developmental Institute's Wechsler Intelligence Scale for Children. The total, verbal, and performance IQ scores were evaluated. The relationship between sleep duration and IQ scores after adjusting for maternal age, maternal educational level, maternal occupation, maternal IQ, exposure to secondhand smoking, gestational age, and monthly age and birth season was also assessed. RESULTS Longer sleep duration was significantly associated with improved verbal IQ measures (β 0.55; p value 0.030). After stratifying participants by sex, a significant association was observed between sleep duration and total, verbal, and performance IQ scores in boys (total IQ 2.49, p value 0.012; verbal IQ 0.75, p value: 0.037; performance IQ 0.73, p value 0.048), but not in girls. CONCLUSIONS The results indicated that only boys show a significant association between IQ scores and sleep duration. These findings support the hypothesis that sleep duration is associated with IQ, in a sex dependent manner. Future studies are needed for a thorough evaluation of the connection between sleep duration and health outcome in young children.
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Affiliation(s)
- Kyung-Shin Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.,Environmental Health Center, Seoul National University College of Medicine, Seoul, Korea
| | - Johanna Inhyang Kim
- Department of Psychiatry, Hanyang University Medical Center, Seoul, Republic of Korea
| | - Yoon-Jung Choi
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.,Environmental Health Center, Seoul National University College of Medicine, Seoul, Korea
| | - Jinwoo Cho
- Department of Statistics, University of Pittsburgh, Pittsburgh, USA
| | - Youn-Hee Lim
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Copenhagen, Denmark.,Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, South Korea
| | - Bung-Nyun Kim
- Division of Children and Adolescent Psychiatry, Department of Psychiatry, Seoul National University Hospital, Seoul, Korea
| | - Choong Ho Shin
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Korea
| | - Young Ah Lee
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Korea
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea. .,Environmental Health Center, Seoul National University College of Medicine, Seoul, Korea. .,Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, South Korea.
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Choi G, Villanger GD, Drover SSM, Sakhi AK, Thomsen C, Nethery RC, Zeiner P, Knudsen GP, Reichborn-Kjennerud T, Øvergaard KR, Herring AH, Skogan AH, Biele G, Aase H, Engel SM. Prenatal phthalate exposures and executive function in preschool children. ENVIRONMENT INTERNATIONAL 2021; 149:106403. [PMID: 33524667 PMCID: PMC7945722 DOI: 10.1016/j.envint.2021.106403] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/10/2021] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Prenatal phthalate exposure has been linked with altered neurodevelopment, including externalizing behaviors and attention-deficit hyperactivity disorder (ADHD). However, the implicated metabolite, neurobehavioral endpoint, and child sex have not always been consistent across studies, possibly due to heterogeneity in neurodevelopmental instruments. The complex set of findings may be synthesized using executive function (EF), a construct of complex cognitive processes that facilitate ongoing goal-directed behaviors. Impaired EF can be presented with various phenotypes of poor neurodevelopment, differently across structured conditions, home/community, or preschool/school. We evaluated the relationship between prenatal phthalate exposure and comprehensive assessment of preschool EF. METHODS Our study comprised 262 children with clinically significant/subthreshold ADHD symptoms and 78 typically developing children who were born between 2003 and 2008 and participated in the Preschool ADHD Substudy, which is nested within a population-based prospective cohort study, the Norwegian Mother, Father, and Child Cohort (MoBa). Twelve phthalate metabolites were measured from urine samples that their mothers had provided during pregnancy, at 17 weeks' gestation. All children, at approximately 3.5-years, took part in a detailed clinical assessment that included parent-and teacher-rated inventories and administered tests. We used instruments that measured constructs related to EF, which include a parent-and teacher-reported Behavior Rating Inventory of Executive Function-Preschool (BRIEF-P) and three performance-based tests: A Developmental NEuroPSYchological Assessment (NEPSY), Stanford-Binet intelligence test V (SB5), and the cookie delay task (CDT). The standard deviation change in test score per interquartile range (IQR) increase in phthalate metabolite was estimated with multivariable linear regression. We applied weighting in all models to account for the oversampling of children with clinically significant or subthreshold symptoms of ADHD. Additionally, we assessed modification by child sex and potential co-pollutant confounding. RESULTS Elevated exposure to mono-benzyl phthalate (MBzP) during pregnancy was associated with poorer EF, across all domains and instruments, in both sex. For example, an IQR increase in MBzP was associated with poorer working memory rated by parent (1.23 [95% CI: 0.20, 2.26]) and teacher (1.13 [0.14, 2.13]) using BRIEF-P, and administered tests such as SB5 (no-verbal: 0.19 [0.09, 0.28]; verbal: 0.13 [0.01, 0.25]). Adverse associations were also observed for mono-n-butyl phthalate (MnBP) and mono-iso-butyl phthalate (MiBP), although results varied by instruments. EF domains reported by parents using BRIEF-P were most apparently implicated, with stronger associations among boys (e.g., MnBP and inhibition: 2.74 [1.77, 3.72]; MiBP and inhibition: 1.88 [0.84, 2.92]) than among girls (e.g., MnBP and inhibition: -0.63 [-2.08, 0.83], interaction p-value: 0.04; MiBP and inhibition: -0.15 [-1.04, 0.74], interaction p-value: 0.3). Differences by sex, however, were not found for the teacher-rated BRIEF-P or administered tests including NEPSY, SB5, and CDT. CONCLUSION AND RELEVANCE Elevated mid-pregnancy MBzP, MiBP, and MnBP were associated with more adverse profiles of EF among preschool-aged children across a range of instruments and raters, with some associations found only among boys. Given our findings and accumulating evidence of the prenatal period as a critical window for phthalate exposure, there is a timely need to expand the current phthalate regulations focused on baby products to include pregnancy exposures.
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Affiliation(s)
- Giehae Choi
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Gro D Villanger
- Department of Child Health and Development, Division of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Samantha S M Drover
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Amrit K Sakhi
- Department of Environmental Health, Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Cathrine Thomsen
- Department of Environmental Health, Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Rachel C Nethery
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Pål Zeiner
- Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway
| | - Gun Peggy Knudsen
- Division of Health Data and Digitalization, Norwegian Institute of Public Health, Oslo, Norway
| | - Ted Reichborn-Kjennerud
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Mental Disorders, Division of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Kristin R Øvergaard
- Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Amy H Herring
- Department of Statistical Science, Global Health Institute, Department of Biostatistics and Bioinformatics, Duke University, Durham, NC, USA
| | - Annette H Skogan
- The National Centre for Epilepsy, PO Box 4956, Nydalen, N-0424 Oslo, Norway
| | - Guido Biele
- Department of Child Health and Development, Division of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Heidi Aase
- Department of Child Health and Development, Division of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Stephanie M Engel
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Xu H, Sheng J, Wu X, Zhan K, Tao S, Wen X, Liu W, Cudjoe O, Tao F. Moderating effects of plastic packaged food on association of urinary phthalate metabolites with emotional symptoms in Chinese adolescents. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 216:112171. [PMID: 33812210 DOI: 10.1016/j.ecoenv.2021.112171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 03/02/2021] [Accepted: 03/17/2021] [Indexed: 05/26/2023]
Abstract
Previous research reports that diet is the main source of phthalate exposure to adolescents, and phthalate is associated with adolescent mental and behavioral problems. However, no study has explored the moderating effects of eating behavior in this association. This study aimed to analyze the moderating effects of plastic packaged food consumption in the longitudinal association between phthalate metabolite concentration and emotional symptoms in adolescents. This school-based survey was carried out among adolescents in two Chinese provinces. We conducted a baseline and follow-up surveys for 893 freshmen using the purposive sampling method from December 2018 to November 2019. We used food frequency questionnaire to assess eating behavior. The Chinese version of 21-item Depression Anxiety Stress Scales was used to assess emotional symptoms, and high-performance liquid chromatography-tandem mass spectrometry was used to analyze the concentration of six urine phthalate metabolites. The results of latent moderation model indicated that plastic packaged food consumption moderated the association of low molecular weight phthalate (LMWP) with depressive symptoms (β = 0.27, P = 0.002), anxiety symptoms (β = 0.89, P < 0.01), and stress symptoms (β = 0.23, P = 0.019). The moderating effects were significant at the higher scores (β = 0.14-0.35, P < 0.05) and/or the lower scores (β = -0.35 to -0.12, P < 0.05) of plastic packaged food consumption. The results suggest that plastic packaged food consumption to some extent moderates the longitudinal association of phthalate exposure with emotional symptoms in adolescents.
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Affiliation(s)
- Honglv Xu
- School of Medicine, Kunming University, 2 Puxin Road, Kunming 650214, Yunnan, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 81 Meishan Road, Hefei 230032, Anhui, PR China
| | - Jie Sheng
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 81 Meishan Road, Hefei 230032, Anhui, PR China
| | - Xiaoyan Wu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei 230032, Anhui, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 81 Meishan Road, Hefei 230032, Anhui, PR China
| | - Kai Zhan
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Science, Hefei 230031, Anhui, PR China
| | - Shuman Tao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei 230032, Anhui, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 81 Meishan Road, Hefei 230032, Anhui, PR China
| | - Xing Wen
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei 230032, Anhui, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 81 Meishan Road, Hefei 230032, Anhui, PR China
| | - Wenwen Liu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei 230032, Anhui, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 81 Meishan Road, Hefei 230032, Anhui, PR China
| | - Obed Cudjoe
- University of Cape Coast, Department of Microbiology and Immunology, School of Medical Sciences, Cape Coast, Ghana; Department and the Key Laboratory of Microbiology and Parasitology, Anhui, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
| | - Fangbiao Tao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei 230032, Anhui, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, 81 Meishan Road, Hefei 230032, Anhui, PR China.
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Lee KS, Kim BN, Cho J, Jang YY, Choi YJ, Lee WS, Han C, Bae HJ, Lim YH, Kim JI, Shin CH, Lee YA, Hong YC. Associations between surrounding residential greenness and intelligence quotient in 6-year-old children. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 759:143561. [PMID: 33199008 DOI: 10.1016/j.scitotenv.2020.143561] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Residential greenness has been reported to be positively associated with health benefits for children, including improved cognitive function. We investigated the association between the intelligence quotient (IQ) of 6-year-old children in Seoul, South Korea and surrounding greenness currently and during the mothers' pregnancy. We also analyzed whether these effects differed by the type of greenness, such as natural or built greenness. METHODS This study considered 189 mother-child dyads from the Environment and Development of Children Cohort study, who lived in Seoul during the prenatal period and when the child was 6 years old. We defined surrounding greenness using Landsat image data from Korean Arirang satellite images with buffers within 100 m - 2000 m of the radius of each participant's residential address. We separately analyzed two types of greenness, namely natural and built greenness. The children's IQ (total, verbal, and performance IQ) was measured using the Korean Educational Developmental Institute's Wechsler Intelligence Scale for Children. RESULTS Prenatal exposure to built greenness in 500 m and 1000 m buffers was associated with children's total IQ in a full model [difference in IQ (95% CI): 3.46(0.68, 6.24) and 3.42 (0.53, 6.31) per interquartile increase in proportion of greenness]. However, postnatal exposure to built greenness in all buffers was associated in children's total IQ. We found a stronger association between children's total IQ and built greenness rather than natural greenness. CONCLUSIONS We found that 6-year-old children tended to score higher on total IQ if they lived in greener neighborhoods. The results provide further evidence of the health benefits of greenness and provide support for urban planning and public health to build healthy urban cities for children and pregnant women.
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Affiliation(s)
- Kyung-Shin Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, South Korea.
| | - Bung-Nyun Kim
- Division of Children and Adolescent Psychiatry, Department of Psychiatry, Seoul National University Hospital, Seoul, South Korea.
| | - Jinwoo Cho
- Department of Statistics, University of Pittsburgh, Pittsburgh, PA, USA.
| | - Yoon-Young Jang
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, South Korea.
| | - Yoon-Jung Choi
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, South Korea.
| | - Woo-Seok Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, South Korea.
| | - Changwoo Han
- Department of Preventive Medicine and Public Health, Chungnam National University, College of Medicine, Daejeon, South Korea.
| | - Hyun Joo Bae
- Korea Environment Institute, Sejong, South Korea..
| | - Youn-Hee Lim
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen, Denmark; Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, South Korea.
| | - Johanna Inhyang Kim
- Department of Psychiatry, Hanyang University Medical Center, Seoul, Republic of Korea.
| | - Choong Ho Shin
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Republic of Korea.
| | - Young Ah Lee
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Republic of Korea.
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, South Korea; Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, South Korea.
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Sears CG, Braun JM. Phthalate Exposure, Adolescent Health, and the Need for Primary Prevention. Endocrinol Metab Clin North Am 2020; 49:759-770. [PMID: 33153678 DOI: 10.1016/j.ecl.2020.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Phthalates, a class of endocrine-disrupting chemicals, are used widely in many consumer products, and exposure can interfere with a range of hormonal functions during early life. These disruptions may alter development during late childhood and adolescence. This article discusses the potential effects of phthalate exposure on adiposity, puberty, and neurodevelopment during late childhood and adolescence. It also highlights studies of behavioral interventions to reduce phthalate exposures and the roles of health care professionals and policy makers in preventing phthalate exposure.
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Affiliation(s)
- Clara G Sears
- Department of Epidemiology, Brown University School of Public Health, Box G-S121-2, 121 South Main Street, Providence, RI 02912, USA.
| | - Joseph M Braun
- Department of Epidemiology, Brown University School of Public Health, Box G-S121-2, 121 South Main Street, Providence, RI 02912, USA. https://twitter.com/JosephMBraun1
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Schantz SL, Eskenazi B, Buckley JP, Braun JM, Sprowles JN, Bennett DH, Cordero J, Frazier JA, Lewis J, Hertz-Picciotto I, Lyall K, Nozadi SS, Sagiv S, Stroustrup A, Volk HE, Watkins DJ. A framework for assessing the impact of chemical exposures on neurodevelopment in ECHO: Opportunities and challenges. ENVIRONMENTAL RESEARCH 2020; 188:109709. [PMID: 32526495 PMCID: PMC7483364 DOI: 10.1016/j.envres.2020.109709] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/22/2020] [Accepted: 05/19/2020] [Indexed: 05/30/2023]
Abstract
The Environmental influences on Child Health Outcomes (ECHO) Program is a research initiative funded by the National Institutes of Health that capitalizes on existing cohort studies to investigate the impact of early life environmental factors on child health and development from infancy through adolescence. In the initial stage of the program, extant data from 70 existing cohort studies are being uploaded to a database that will be publicly available to researchers. This new database will represent an unprecedented opportunity for researchers to combine data across existing cohorts to address associations between prenatal chemical exposures and child neurodevelopment. Data elements collected by ECHO cohorts were determined via a series of surveys administered by the ECHO Data Analysis Center. The most common chemical classes quantified in multiple cohorts include organophosphate pesticides, polychlorinated biphenyls, polybrominated diphenyl ethers, environmental phenols (including bisphenol A), phthalates, and metals. For each of these chemicals, at least four ECHO cohorts also collected behavioral data during infancy/early childhood using the Child Behavior Checklist. For these chemicals and this neurodevelopmental assessment (as an example), existing data from multiple ECHO cohorts could be pooled to address research questions requiring larger sample sizes than previously available. In addition to summarizing the data that will be available, the article also describes some of the challenges inherent in combining existing data across cohorts, as well as the gaps that could be filled by the additional data collection in the ECHO Program going forward.
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Affiliation(s)
- Susan L Schantz
- Department of Comparative Biosciences, College of Veterinary Medicine, and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
| | - Brenda Eskenazi
- Center for Environmental Research and Children's Health, School of Public Health, University of California Berkeley, Berkeley, CA, USA.
| | - Jessie P Buckley
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
| | - Joseph M Braun
- Department of Epidemiology, Brown University, Providence, RI, USA.
| | - Jenna N Sprowles
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
| | - Deborah H Bennett
- Department of Public Health Sciences, University of California, Davis, CA, USA.
| | - Jose Cordero
- Department of Epidemiology and Biostatistics, College of Public Health, University of Georgia, Athens, GA, USA.
| | - Jean A Frazier
- Eunice Kennedy Shriver Center, Division of Child and Adolescent Psychiatry, University of Massachusetts Medical School, Worcester, MA, USA.
| | - Johnnye Lewis
- Community Environmental Health Program and Center for Native Environmental Health Equity Research, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.
| | | | - Kristen Lyall
- A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA, USA.
| | - Sara S Nozadi
- Community Environmental Health Program and Center for Native Environmental Health Equity Research, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.
| | - Sharon Sagiv
- Center for Environmental Research and Children's Health, School of Public Health, University of California Berkeley, Berkeley, CA, USA.
| | - AnneMarie Stroustrup
- Division of Newborn Medicine, Department of Pediatrics, Department of Environmental Medicine and Public Health, and Department of Obstetrics, Gynecology and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Heather E Volk
- Departments of Mental Health and Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
| | - Deborah J Watkins
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA.
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Lee WS, Lim YH, Kim BN, Shin CH, Lee YA, Kim JI, Hong YC, Kim KN. Residential pyrethroid insecticide use, urinary 3-phenoxybenzoic acid levels, and attention-deficit/hyperactivity disorder-like symptoms in preschool-age children: The Environment and Development of Children study. ENVIRONMENTAL RESEARCH 2020; 188:109739. [PMID: 32504851 DOI: 10.1016/j.envres.2020.109739] [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] [Received: 03/13/2019] [Revised: 02/07/2020] [Accepted: 05/21/2020] [Indexed: 06/11/2023]
Abstract
Previous animal studies have reported that pyrethroids can cause dopamine system abnormalities and attention-deficit/hyperactivity disorder (ADHD) phenotypes. However, epidemiological studies investigating the associations between pyrethroid exposure and ADHD are limited. We aimed to investigate the association between pyrethroid exposure and ADHD-like symptoms among preschool-age children. We used data from 385 children at 4 years of age participating in the Environment and Development of Children (EDC) study. We evaluated pyrethroid exposure through questionnaires and urinary 3-phenoxybenzoic acid (3-PBA) concentrations. We assessed ADHD-like symptoms using the Korean ADHD rating scale (K-ARS). We conducted negative binomial regressions to evaluate the associations between pyrethroid exposure and ADHD-like symptoms. Residential use of insecticide adhesive (β = 0.42, 95% CI: 0.11, 0.74) and insecticide spray (β = 0.33, 95% CI: 0.08, 0.59) was associated with an increase in log-transformed creatinine-adjusted urinary 3-PBA concentrations. Residential insecticide adhesive use was associated with a 51.6% increase in K-ARS scores (95% confidence interval [CI]: 6.3, 116.1) among boys, when compared with non-users. When compared with creatinine-adjusted 3-PBA levels <0.50 μg/g creatinine, creatinine-adjusted 3-PBA levels ≥3.80 μg/g creatinine were associated with a 58% increase in K-ARS scores (95% CI: 0.1, 150.5) among boys. We found associations of residential pyrethroid insecticide use and urinary 3-PBA concentrations with K-ARS scores among preschool-age boys. Since the present study explored cross-sectional associations in preschool-age children, the possibility of reverse causality cannot be dismissed. Further studies implementing a cohort study design are warranted.
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Affiliation(s)
- Woo-Seok Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Youn-Hee Lim
- Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea.
| | - Bung-Nyun Kim
- Division of Child and Adolescent Psychiatry, Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Choong Ho Shin
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Young Ah Lee
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Johanna Inhyang Kim
- Department of Psychiatry, Hanyang University Medical Center, Seoul, Republic of Korea.
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Kyoung-Nam Kim
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Public Health and Preventive Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
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Zhu YD, Wu XY, Yan SQ, Huang K, Tong J, Gao H, Xie Y, Tao SM, Ding P, Zhu P, Tao FB. Domain- and trimester-specific effect of prenatal phthalate exposure on preschooler cognitive development in the Ma'anshan Birth Cohort (MABC) study. ENVIRONMENT INTERNATIONAL 2020; 142:105882. [PMID: 32593839 DOI: 10.1016/j.envint.2020.105882] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 05/07/2020] [Accepted: 06/10/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Phthalates are a group of heavily produced endocrine disruptors that are widely used in personal care products, food packaging, building materials, and medical device. Few epidemiological studies have examined the effect of repeated prenatal exposure to multiple phthalates on preschooler cognitive development. OBJECTIVES This study aimed to examine the association between prenatal phthalate exposure measured at multiple time points and the intelligent quotient (IQ) scores of preschoolers, and to further identify the critical windows and specific intelligence domains in which phthalate exposure would affect preschooler cognitive development. METHODS The current study was based on the Ma'anshan Birth Cohort (MABC) study. Seven phthalate metabolites were measured in 2128 maternal urine samples collected during the first, second, and third trimesters of pregnancy. The IQ score of preschool-aged children were assessed with the Chinese version of the Wechsler Preschool and Primary Scale of Intelligence, Fourth edition (WPPSI-Ⅳ CN). Linear mixed models (LMMs) were used to assess the longitudinal effects of repeated prenatal phthalate exposure on children's IQ score. Multiple linear regression models were fitted to determine whether critical window phthalate exposure would affect cognitive development of children. RESULTS Overall, the repeated measures analysis indicated that the verbal comprehension index (VCI), visual space index (VSI) and full-scale intelligence quotient (FSIQ) decreased by 0.30 (95% CI: -0.60, 0; p = 0.05), 0.32 (95% CI: -0.62, -0.01; p = 0.04), and 0.31 (95% CI:-0.57, -0.04; p = 0.02) points, respectively, with each ln-transformed increase in the metabolite concentration of MBP. The fluid reasoning index (FRI) and processing speed index (PSI) increased by 0.30 (95% CI: 0.07, 0.54; p = 0.01) and 0.28 (95% CI: 0.06, 0.51; p = 0.01) points, respectively, with each ln-concentration increase in MEP. Trimester-specific regression models stratified by the sample collection time during pregnancy generated consistent results. In the first trimester, each ln-transformed MBP increase was associated with reductions in VCI, VSI and FSIQ of 0.56 (95% CI:-1.09, -0.02; p = 0.04), 0.60 (95% CI:-1.15, -0.05; p = 0.03) and 0.49 (95% CI:-0.97, -0.01; p = 0.04) points, respectively. In the third trimester, we observed that only MBzP exposure was associated with an increase in VCI (β: 0.48, 95% CI: 0.03, 0.92; p = 0.04). The gender-stratified analyses revealed that boys drove these associations. CONCLUSIONS Our results suggest that prenatal phthalate exposure impairs the cognitive development of preschoolers. The first trimester of pregnancy might be the most vulnerable period in terms of neurotoxicitydue to phthalate exposure. These findings warrant further confirmation.
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Affiliation(s)
- Yuan-Duo Zhu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Xiao-Yan Wu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Shuang-Qin Yan
- Ma'anshan Maternal and Child Healthcare (MCH) Center, Ma'anshan 243011, China
| | - Kun Huang
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Juan Tong
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Hui Gao
- MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Yang Xie
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Shu-Man Tao
- MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Peng Ding
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Peng Zhu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China
| | - Fang-Biao Tao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China; MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei 230032, Anhui, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University, No 81 Meishan Road, Hefei 230032, Anhui, China.
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Kim KN, Kim HY, Lim YH, Shin CH, Kim JI, Kim BN, Lee YA, Hong YC. Prenatal and early childhood phthalate exposures and thyroid function among school-age children. ENVIRONMENT INTERNATIONAL 2020; 141:105782. [PMID: 32450450 DOI: 10.1016/j.envint.2020.105782] [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: 02/06/2020] [Revised: 04/14/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Limited studies have investigated the association between prenatal and early childhood phthalate exposures and thyroid function among children. OBJECTIVES To investigate the association between early life phthalate exposure and thyroid function among school-age children, considering both prenatal and early childhood exposures, using longitudinal data from an established prospective cohort. METHODS We measured urinary phthalate metabolite levels during pregnancy and at 2, 4, and 6 years of age and conducted thyroid function tests at 6 years of age. We assessed the associations between phthalate metabolite levels and thyroid function using linear regression and Bayesian kernel machine regression (BKMR) models (n = 492). RESULTS In linear regression models, a doubling of urinary mono-n-butyl phthalate (MnBP) levels, measured during pregnancy and at 4 years of age, was associated with lower thyroid-stimulating hormone (TSH) levels at 6 years of age (-5.0%, 95% confidence interval [CI]: -8.8%, -1.0% and -5.7%, 95% CI: -9.7%, -1.5%, respectively). A similar association was found between mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP) levels at 4 years of age and TSH levels at 6 years of age (-5.5%, 95% CI: -9.7%, -1.1%). Urinary mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) (2.3%, 95% CI: 0.1%, 4.5%) and MEOHP levels at 2 years of age (2.2%, 95% CI: 0.1%, 4.4%) and mono-2-ethyl-5-carboxypentyl phthalate (1.4%, 95% CI: 0.1%, 2.7%) and mono-benzyl phthalate levels at 6 years of age (1.1%, 95% CI: 0.4%, 1.9%) were associated with higher triiodothyronine (T3) levels at 6 years of age. Urinary MnBP during pregnancy, MEHHP, MEOHP, and MnBP at 4 years of age were also associated with lower free thyroxine (fT4) × TSH. In BKMR models, urinary MnBP levels during pregnancy were associated with lower TSH levels and fT4 × TSH (both posterior inclusion probabilities: 0.99). CONCLUSIONS Our findings suggest that early life phthalate exposure influences subsequent thyroid function. However, the results should be interpreted cautiously, because a single spot urine sample was used to quantify the phthalate exposures at each time point.
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Affiliation(s)
- Kyoung-Nam Kim
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Public Health and Preventive Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Hwa Young Kim
- Department of Pediatrics, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
| | - Youn-Hee Lim
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Choong Ho Shin
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Johanna Inhyang Kim
- Department of Psychiatry, Hanyang University Medical Center, Seoul, Republic of Korea
| | - Bung-Nyun Kim
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Young Ah Lee
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Division of Public Health and Preventive Medicine, Seoul National University Hospital, Seoul, Republic of Korea; Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea.
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Li Y, Li X, Xie M, Cheng L, Chen H, Sun H, Jiang L. [Toxicity of dibutyl phthalate in primary cultured rat hippocampal neurons and the toxicological mechanism]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:225-232. [PMID: 32376539 DOI: 10.12122/j.issn.1673-4254.2020.02.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the neurotoxicity and toxicological mechanism of dibutyl phthalate (DBP) in primary cultured rat hippocampal neurons. METHODS Primary rat hippocampal neurons cultured for 4 days were exposed to 1 g/L DBP for 24, 48, or 96 h. Immunofluorescence assay and transmission electron microscopy (TEM) were used to observe the morphological changes of the axons and the ultrastructure of DBP-treated neurons. The action potential (AP) of the hippocampal neurons was measured with patch-clamp electrophysiology. CCK-8 assay was used to detect the viability of the hippocampal neurons, and Western blotting was performed to determine the mRNA and protein expressions of brain-derived neurotrophic factor (BDNF), neuropeptide Y (NPY) and estrogen receptor β (ERβ). High-performance liquid chromatography-tandem mass spectrometry (HPLC-MS) was employed to detect the release of the neurotransmitter GABA. RESULTS After exposure to DBP for 96 h, the cellular network of the hippocampal neurons became sparse, and the neurons showed significantly decreased axonal length (P < 0.01) and presented with round cell nuclei, chromatin aggregation and cytoplasmic vacuolization. Patch-clamp electrophysiology revealed depolarization drift and increased frequency of discharge in the exposed neurons (P < 0.01). The neurons with DBP exposure for 24, 48 and 96 h all showed significantly decreased cell viability (P < 0.01). DBP exposure for 48 and 96 h significantly lowered the protein expressions of ERβ, BDNF and NPY, and a 96-h exposure significantly reduced the release of the neurotransmitter GABA in the neurons (P < 0.05). CONCLUSIONS DBP exposure causes morphological and functional damages of primary cultured rat hippocampal neurons. DBP-induced neurotoxicity is probably associated with GABA-mediated blockage of the ERβ-BDNF-NPY signaling communication.
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Affiliation(s)
- Yang Li
- Department of Neurology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
| | - Xiujuan Li
- Department of Neurology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders/National Clinical Research Center for Child Health and Disorders/China International Science and Technology Cooperation Base of Child Development and Critical Disorders/Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Mingdan Xie
- Ministry of Education Key Laboratory of Child Development and Disorders/National Clinical Research Center for Child Health and Disorders/China International Science and Technology Cooperation Base of Child Development and Critical Disorders/Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Li Cheng
- Ministry of Education Key Laboratory of Child Development and Disorders/National Clinical Research Center for Child Health and Disorders/China International Science and Technology Cooperation Base of Child Development and Critical Disorders/Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Hengsheng Chen
- Ministry of Education Key Laboratory of Child Development and Disorders/National Clinical Research Center for Child Health and Disorders/China International Science and Technology Cooperation Base of Child Development and Critical Disorders/Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Hong Sun
- Ministry of Education Key Laboratory of Child Development and Disorders/National Clinical Research Center for Child Health and Disorders/China International Science and Technology Cooperation Base of Child Development and Critical Disorders/Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Li Jiang
- Department of Neurology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
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van den Dries MA, Guxens M, Spaan S, Ferguson KK, Philips E, Santos S, Jaddoe VW, Ghassabian A, Trasande L, Tiemeier H, Pronk A. Phthalate and Bisphenol Exposure during Pregnancy and Offspring Nonverbal IQ. ENVIRONMENTAL HEALTH PERSPECTIVES 2020; 128:77009. [PMID: 32716663 PMCID: PMC7384796 DOI: 10.1289/ehp6047] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 05/22/2020] [Accepted: 06/10/2020] [Indexed: 05/07/2023]
Abstract
BACKGROUND Prenatal exposures to phthalates and bisphenols are associated with impaired brain development in animals. However, epidemiological studies investigating the association between prenatal phthalate or bisphenol exposure and cognition have produced mixed findings and mostly had modest sample sizes and measured the exposure during the third trimester. OBJECTIVE We examined the association between pregnancy maternal urinary biomarkers of phthalate or bisphenol exposure and nonverbal intelligence quotient (IQ) in children 6 years of age. METHOD The study sample consisted of 1,282 mother-child pairs participating in the Generation R Study, a population-based birth cohort in Rotterdam, Netherlands (enrollment 2002-2006). We measured maternal urinary concentrations of 18 phthalate metabolites and 8 bisphenols at < 18 , 18-25, and > 25 wks of gestation. Child nonverbal IQ was measured at 6 years of age using the Snijders-Oomen Nonverbal Intelligence Test-Revised. Linear regression models were fit for each of the three collection phases separately, the three collection phases jointly, and for the averaged prenatal exposure across pregnancy. RESULTS Higher urinary concentrations of phthalate metabolites during early pregnancy were associated with lower child nonverbal IQ score [e.g., B per 10-fold increase in summed low-molecular weight phthalates = - 1.7 (95% CI: - 3.1 , - 0.3 )]. This association remained unchanged when adjusted for mid and late pregnancy exposures. We also observed an inverse association between late pregnancy di-n-octyl phthalate (DNOP) exposure and nonverbal IQ. Maternal urinary concentrations of bisphenols were not associated with child nonverbal IQ. There was no effect estimate modification by sex. CONCLUSIONS We did not observe that maternal biomarkers of bisphenol exposure are associated with nonverbal IQ. We found that phthalate exposure in early pregnancy and DNOP exposure in late pregnancy are associated with lower nonverbal IQ scores in children. Our results might suggest that particularly early pregnancy is a sensitive window of phthalate exposure, but future studies are needed to replicate our findings. https://doi.org/10.1289/EHP6047.
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Affiliation(s)
- Michiel A. van den Dries
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC, University Medical Centre, Rotterdam, Netherlands
- Generation R Study Group, Erasmus Medical Center, Rotterdam, Netherlands
| | - Mònica Guxens
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC, University Medical Centre, Rotterdam, Netherlands
- Barcelona Institute for Global Health, Barcelona, Spain
- Pompeu Fabra University, Barcelona, Spain
- Spanish Consortium for Research on Epidemiology and Public Health, Instituto de Salud Carlos III, Spain
| | - Suzanne Spaan
- Department of Risk Analysis for Products in Development, TNO, Utrecht, Netherlands
| | - Kelly K. Ferguson
- Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Durham, North Carolina, USA
| | - Elise Philips
- Generation R Study Group, Erasmus Medical Center, Rotterdam, Netherlands
- Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, Netherlands
- Department of Pediatrics, Erasmus MC, University Medical Centre, Rotterdam, Netherlands
| | - Susana Santos
- Generation R Study Group, Erasmus Medical Center, Rotterdam, Netherlands
- Department of Pediatrics, Erasmus MC, University Medical Centre, Rotterdam, Netherlands
| | - Vincent W.V. Jaddoe
- Generation R Study Group, Erasmus Medical Center, Rotterdam, Netherlands
- Department of Pediatrics, Erasmus MC, University Medical Centre, Rotterdam, Netherlands
| | - Akhgar Ghassabian
- Department of Pediatrics, New York University School of Medicine, New York, New York, USA
- Department of Environmental Medicine, New York University School of Medicine, New York, New York, USA
- Department of Population Health, New York University School of Medicine, New York, New York, USA
| | - Leonardo Trasande
- Department of Pediatrics, New York University School of Medicine, New York, New York, USA
- Department of Environmental Medicine, New York University School of Medicine, New York, New York, USA
- Department of Population Health, New York University School of Medicine, New York, New York, USA
- New York University Wagner School of Public Service, New York, New York, USA
- New York University College of Global Public Health, New York, New York, USA
| | - Henning Tiemeier
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC, University Medical Centre, Rotterdam, Netherlands
- Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, USA
| | - Anjoeka Pronk
- Department of Risk Analysis for Products in Development, TNO, Utrecht, Netherlands
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Xu H, Wu X, Liang C, Shen J, Tao S, Wen X, Liu W, Zou L, Yang Y, Xie Y, Jin Z, Li T, Tao F. Association of urinary phthalates metabolites concentration with emotional symptoms in Chinese university students. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 262:114279. [PMID: 32443185 DOI: 10.1016/j.envpol.2020.114279] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/30/2020] [Accepted: 02/25/2020] [Indexed: 06/11/2023]
Abstract
Previous studies have shown the associations between phthalates exposure and psychological behavior problems in children and adolescents, but such associations have not been fully elucidated in university students, especially among Chinese university students. This study aims to examine the association between urinary phthalates metabolites concentration and emotional symptoms in Chinese university students. A school-based cross-sectional survey was carried out among 990 university students aged 17-24 years from two universities in Anhui and Jiangxi provinces of China. Concentration of six phthalate metabolites in urine was determined by high-performance liquid chromatography-tandem mass spectrometry and the emotional symptoms were assessed by the 21-item Depression, Anxiety, and Stress Scale. The detection rate of six phthalate metabolites in urine ranged from 79.6% to 99.7%. The median concentration of six phthalate metabolites ranged from 2.90 to 119.64 ng/mL. The positive rates of depressive symptoms, anxiety symptoms, and stress were 17.4%, 24.8%, and 9.5%, respectively. After adjusting for the confounding variables, mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) was found to be associated with depressive symptoms (β = 8.84, P = 0.017), anxiety symptoms (β = 8.46, P = 0.015), and stress symptoms (β = 9.95, P = 0.012) in males; whereas, monobutyl phthalate (MBP) was found to be associated with depressive symptoms (β = 1.86, P = 0.002), anxiety symptoms (β = 1.81, P = 0.005), and stress symptoms (β = 1.48, P = 0.047) in females. Our study demonstrates that Chinese university students are widely exposed to phthalates; and high- and low-molecular weight phthalates are associated with emotional symptoms in males and females, respectively.
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Affiliation(s)
- Honglv Xu
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Xiaoyan Wu
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Chunmei Liang
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Jie Shen
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Shuman Tao
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Xing Wen
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Wenwen Liu
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Liwei Zou
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Yajuan Yang
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Yang Xie
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Zhongxiu Jin
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Tingting Li
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China
| | - Fangbiao Tao
- School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, PR China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, PR China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, PR China.
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Tang Z, Chai M, Wang Y, Cheng J. Phthalates in preschool children's clothing manufactured in seven Asian countries: Occurrence, profiles and potential health risks. JOURNAL OF HAZARDOUS MATERIALS 2020; 387:121681. [PMID: 31757725 DOI: 10.1016/j.jhazmat.2019.121681] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/11/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
Phthalates could be introduced into clothing as chemical additives or impurities, becoming a potential source of human exposure. We measured the concentrations of 15 phthalates in new preschool children's clothing manufactured in seven Asian countries. Phthalates were prevalent in all samples, and total concentrations were 2.92-223 μg/g, indicating a moderate contamination level. Bis(2-ethylhexyl) phthalate, di(isobutyl) phthalate and di-n-butyl phthalate were the most abundant phthalates measured, representing a median of 48.5 %, 13.6 % and 13.4 % of the total concentrations, respectively. Total concentrations did not differ significantly by country of manufacture, while the concentrations of individual phthalates and their composition profiles varied widely. We also found differing phthalate levels by item type, fabric composition, and color. Under the assumed two exposure scenarios, the median of summed dermal exposure doses of six phthalate were 539 and 950 ng/kg of body weight per day, respectively. When children wore trousers, long-sleeved shirts, briefs and socks at the same time, the reproductive risks exceeded acceptable level, although the carcinogenic risk of DEHP was low. Our results suggested that new clothing is an important route of phthalate exposure to preschool children. More research is required to investigate the contaminations and associated with risks in child clothing.
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Affiliation(s)
- Zhenwu Tang
- College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China; College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
| | - Miao Chai
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Yuwen Wang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Jiali Cheng
- Key Laboratory of Trace Element Nutrition of National Health Commission, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
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Radke EG, Braun JM, Nachman RM, Cooper GS. Phthalate exposure and neurodevelopment: A systematic review and meta-analysis of human epidemiological evidence. ENVIRONMENT INTERNATIONAL 2020; 137:105408. [PMID: 32045779 PMCID: PMC8453372 DOI: 10.1016/j.envint.2019.105408] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 09/30/2019] [Accepted: 12/09/2019] [Indexed: 05/09/2023]
Abstract
OBJECTIVE We performed a systematic review of the epidemiology literature to identify the neurodevelopmental effects associated with phthalate exposure. DATA SOURCES AND STUDY ELIGIBILITY CRITERIA Six phthalates were included in the review: di(2-ethylhexyl) phthalate (DEHP), diisononyl phthalate (DINP), dibutyl phthalate (DBP), diisobutyl phthalate (DIBP), butyl benzyl phthalate (BBP), and diethyl phthalate (DEP). The initial literature search (of PubMed, Web of Science, and Toxline) included all studies of neurodevelopmental effects in humans, and outcomes were selected for full systematic review based on data availability. STUDY EVALUATION AND SYNTHESIS METHODS Studies of neurodevelopmental effects were evaluated using criteria defined a priori for risk of bias and sensitivity by two reviewers using a domain-based approach. Evidence was synthesized by outcome and phthalate and strength of evidence was summarized using a structured framework. For studies of cognition and motor effects in children ≤4 years old, a random effects meta-analysis was performed. RESULTS The primary outcomes reviewed here are (number of studies in parentheses): cognition (14), motor effects (9), behavior, including attention deficit hyperactivity disorder (20), infant behavior (3), and social behavior, including autism spectrum disorder (7). For each phthalate/outcome combination, there was slight or indeterminate evidence of an association, with the exception of motor effects for BBP, which had moderate evidence. CONCLUSIONS AND IMPLICATIONS OF KEY FINDINGS Overall, there is not a clear pattern of association between prenatal phthalate exposures and neurodevelopment. There are several possible reasons for the observed null associations related to exposure misclassification, periods of heightened susceptibility, sex-specific effects, and the effects of phthalate mixtures. Until these limitations are adequately addressed in the epidemiology literature, these findings should not be interpreted as evidence that there are no neurodevelopmental effects of phthalate exposure. The views expressed are those of the authors and do not necessarily represent the views or policies of the U.S. EPA.
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Affiliation(s)
- Elizabeth G Radke
- U.S. Environmental Protection Agency, National Center for Environmental Assessment, United States.
| | - Joseph M Braun
- Brown University, School of Public Health, United States
| | - Rebecca M Nachman
- U.S. Environmental Protection Agency, National Center for Environmental Assessment, United States
| | - Glinda S Cooper
- U.S. Environmental Protection Agency, National Center for Environmental Assessment, United States; The Innocence Project, United States
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Endocrine-Disrupting Chemicals in Human Fetal Growth. Int J Mol Sci 2020; 21:ijms21041430. [PMID: 32093249 PMCID: PMC7073082 DOI: 10.3390/ijms21041430] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/15/2020] [Accepted: 02/18/2020] [Indexed: 12/17/2022] Open
Abstract
Fetal growth is regulated by a complex interaction of maternal, placental, and fetal factors. The effects and outcomes that chemicals, widely distributed in the environment, may have on the health status of both the mother and the fetus are not yet well defined. Mainly mixtures of chemical substances are found in the mothers and placenta. Exposure to endocrine-disrupting chemicals (EDCs) can be associated with fetal growth retardation, thyroid dysfunction, and neurological disorders. EDCs mostly interfere with insulin, glucocorticoid, estrogenic, and thyroid pathways, with subsequent effects on normal endocrine and metabolic functions, which cause changes in the epigenome and state of inflammation with life-long effects and consequences. International scientific societies recommend the implementation of research and of all possible preventive measures. This review briefly summarizes all these aspects.
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Puklová V, Janoš T, Sochorová L, Vavrouš A, Vrbík K, Fialová A, Hanzlíková L, Černá M. Exposure to Mixed Phthalates in Czech Preschool and School Children. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 77:471-479. [PMID: 31214748 DOI: 10.1007/s00244-019-00645-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 06/08/2019] [Indexed: 06/09/2023]
Abstract
Knowledge of population exposure to phthalates based on the urinary metabolite levels is of the highest importance for health risk assessment. Such data are scarce in the Czech population. In the study conducted in 2016, six urinary phthalate metabolites were analysed in a total of 370 first morning urine samples of healthy children aged 5 and 9 years, namely mono(2-ethylhexyl) phthalate (MEHP), mono(2-ethyl-5-hydroxyhexyl) phthalate (5OH-MEHP), mono(2-ethyl-5-oxohexyl) phthalate (5oxo-MEHP), mono-benzyl phthalate (MBzP), mono-iso-butyl phthalate (MiBP), and mono-n-butyl phthalate (MnBP). The two latter mono-butyl phthalate isoforms dominated among all samples with geometric means of 63.0 µg/L (MnBP) and 44.1 µg/L (MiBP), followed by 5OH-MEHP (20.6 µg/L), 5oxo-MEHP (12.9 µg/L), MBzP (3.65 µg/L), and MEHP (2.31 µg/L). Daily intake (DI) of the parent phthalates was estimated using the creatinine-based model. The highest DI values were found for di-n-butyl phthalate (DnBP) (median 2.5 µg/kg bw/day; 95th percentile 7.8 µg/kg bw/day) and di-2-ethylhexyl phthalate (DEHP) (median 2.3 µg/kg bw/day; 95th percentile 8.9 µg/kg bw/day) in 5-year-old children. The tolerable daily intake (TDI) set by the European Food Safety Authority (EFSA) was exceeded in case of DnBP (in 1% of 9-year-olds and in 3% of 5-year-olds). Exposure risk was assessed based on hazard quotients calculation and cumulative approach for similar health effect. The combined exposure to four phthalates expressed by hazard index (HI) for reprotoxicity revealed exceeding of HI threshold in 14% of 5-year-olds and in 9% of 9-year-olds. These findings strongly support the need to reduce the burden of children by phthalates.
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Affiliation(s)
- Vladimíra Puklová
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic.
| | - Tomáš Janoš
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic
| | - Lenka Sochorová
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic
| | - Adam Vavrouš
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic
| | - Karel Vrbík
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic
| | - Alena Fialová
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic
- Third Faculty of Medicine, Charles University, Ruská 87, 10000, Prague, Czech Republic
| | - Lenka Hanzlíková
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic
| | - Milena Černá
- National Institute of Public Health, Šrobárova 48, 10042, Prague, Czech Republic
- Third Faculty of Medicine, Charles University, Ruská 87, 10000, Prague, Czech Republic
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Hyland C, Mora AM, Kogut K, Calafat AM, Harley K, Deardorff J, Holland N, Eskenazi B, Sagiv SK. Prenatal Exposure to Phthalates and Neurodevelopment in the CHAMACOS Cohort. ENVIRONMENTAL HEALTH PERSPECTIVES 2019; 127:107010. [PMID: 31652105 PMCID: PMC6867166 DOI: 10.1289/ehp5165] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
BACKGROUND Previous studies suggest that prenatal exposure to phthalates, ubiquitous synthetic chemicals, may adversely affect neurodevelopment. However, data are limited on how phthalates affect cognition, executive function, and behavioral function into adolescence. OBJECTIVE We aimed to investigate associations of prenatal phthalate exposure with neurodevelopment in childhood and adolescence in the Center for the Health Assessment of Mothers and Children of Salinas (CHAMACOS) study. METHODS We examined associations between maternal urinary phthalate metabolite concentrations measured twice during pregnancy and a range of neurodevelopmental outcomes from ages 7 through 16 y in the CHAMACOS birth cohort (n=334). We used age-specific linear regression models and generalized estimating equation models to assess longitudinal effects and examined differences by sex. RESULTS Phthalate metabolites were detected in 88%-100% of samples, depending on the metabolite. Associations of phthalates with neurodevelopmental outcomes were largely null with some noteworthy patterns. Higher prenatal concentrations of metabolites of low-molecular weight phthalates (ΣLMW) were associated with more self-reported hyperactivity [β=0.8, 95% confidence interval (CI): 0.1, 1.4 per 2-fold increase in ΣLMW phthalates], attention problems (β=1.5, 95% CI: 0.7, 2.2), and anxiety (β=0.9, 95% CI: 0.0, 1.8) at age 16. We observed sex-specific differences for the sums of high-molecular-weight and di(2-ethylhexyl) metabolites and cognitive outcomes (e.g., β for Full-Scale IQ for boys=-1.9, 95% CI: -4.1, 0.3 and -1.7, 95% CI: -3.8, 0.3, respectively; β for girls=1.8, 95% CI: 0.1, 3.4 and 1.6, 95% CI: 0.0, 3.2, respectively; p-int=0.01 for both). CONCLUSION We found predominantly null associations of prenatal phthalates with neurodevelopment in CHAMACOS, and weak associations of ΣLMW phthalates with internalizing and externalizing behaviors in adolescence. No previous studies have examined associations of prenatal phthalate exposure with neurodevelopment into adolescence, an important time for manifestations of effects. https://doi.org/10.1289/EHP5165.
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Affiliation(s)
- Carly Hyland
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
| | - Ana M Mora
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
- Central American Institute for Studies on Toxic Substances (IRET), Universidad Nacional, Heredia, Costa Rica
| | - Katherine Kogut
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
| | - Antonia M Calafat
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Kim Harley
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
| | - Julianna Deardorff
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
| | - Nina Holland
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
| | - Brenda Eskenazi
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
| | - Sharon K Sagiv
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, USA
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Jankowska A, Polańska K, Hanke W, Wesołowska E, Ligocka D, Waszkowska M, Stańczak A, Tartaglione AM, Mirabella F, Chiarotti F, Garí M, Calamandrei G. Prenatal and early postnatal phthalate exposure and child neurodevelopment at age of 7 years - Polish Mother and Child Cohort. ENVIRONMENTAL RESEARCH 2019; 177:108626. [PMID: 31419718 DOI: 10.1016/j.envres.2019.108626] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/30/2019] [Accepted: 08/04/2019] [Indexed: 06/10/2023]
Abstract
Phthalates are among the most frequently investigated environmental chemicals influencing children's health and particularly their neuropsychological development. However, the reported effects of these compounds on child behavior, cognitive and psychomotor outcomes are not fully consistent. The aim of this study is to evaluate the associations between prenatal and early postnatal phthalate exposures and child neurodevelopment at age of 7 years. A total of 134 mother-child pairs from Polish Mother and Child Cohort (REPRO_PL) constitute the basis for current analysis. Eleven phthalate metabolites were measured in urine samples collected from mothers in the 3rd trimester of pregnancy and from children at the age of 2 years. Child neuropsychological development at early school age (7 years) was assessed by both the Strengths and Difficulties Questionnaire (SDQ) filled by mothers and the Polish adaptation of the Intelligence and Development Scales (IDS) performed by psychologists. Mono-ethyl phthalate (MEP) concentration during pregnancy was significantly associated with increased risk of peer relationship problems in SDQ (OR = 2.7, p = 0.03). The results of the IDS analyses focused on child's cognitive and psychomotor development are not fully conclusive. Negative associations were evident between some phthalates in early childhood period and fluid intelligence and cognition (MEP: β = -5.2; p = 0.006; β = -4.2; p = 0.006; mono-n-butyl phthalate (MnBP): β = -4.9; p = 0.03; β = -4.0; p = 0.03; respectively), while positive associations have been found in the prenatal period (mono-2-ethyl-5-oxo-hexyl phthalate (oxo-MEHP): β = 3.6; p = 0.03 for fluid intelligence; β = 2.9; p = 0.03 for cognition). Further studies are required in order to elucidate which are the most critical periods of phthalate exposure on children's neurodevelopmental outcomes.
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Affiliation(s)
- Agnieszka Jankowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland.
| | - Kinga Polańska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland.
| | - Wojciech Hanke
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Ewelina Wesołowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Danuta Ligocka
- Bureau of Quality Assurance, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Małgorzata Waszkowska
- Department of Health and Work Psychology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Aleksander Stańczak
- Department of Health and Work Psychology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Anna Maria Tartaglione
- Centre for Behavioral Sciences and Mental Health, National Institute of Health (ISS), Rome, Italy
| | - Fiorino Mirabella
- Centre for Behavioral Sciences and Mental Health, National Institute of Health (ISS), Rome, Italy
| | - Flavia Chiarotti
- Centre for Behavioral Sciences and Mental Health, National Institute of Health (ISS), Rome, Italy
| | - Mercè Garí
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany; Institute of Computational Biology, German Research Center for Environmental Health, Helmholtz Zentrum München, Neuherberg, Germany
| | - Gemma Calamandrei
- Centre for Behavioral Sciences and Mental Health, National Institute of Health (ISS), Rome, Italy
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Sukree W, Sooksawat D, Kanatharana P, Thavarungkul P, Thammakhet-Buranachai C. A miniature stainless steel net dumbbell-shaped stir-bar for the extraction of phthalate esters in instant noodle and rice soup samples. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2019; 55:60-68. [PMID: 31971076 DOI: 10.1080/03601234.2019.1659053] [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] [Indexed: 06/10/2023]
Abstract
This work reports the development of a very-simple-to-construct stir-bar extraction device so called "a dumbbell-shaped stainless steel stir-bar." The extraction device was assembled from a rolled up stainless steel net filled with an XAD-2 sorbent and a metal rod to allow the use of a magnetic stirrer during extraction. The dumbbell-shaped stainless steel stir-bar was used to extract diethyl phthalate (DEP), dibutyl phthalate (DBP), and di(2-ethylhexyl) phthalate (DEHP) before analysis by a gas chromatograph equipped with an electron capture detector (GD-ECD). Under the optimal conditions, the developed method provided a good linearity from 10.0 to 1,000.0 ng mL-1 for all three compounds. Limits of detection and limits of quantification were 9.37 ± 0.29 ng mL-1 and 31.22 ± 0.95 ng mL-1 for DEP, 5.73 ± 0.31 ng mL-1 and 19.1 ± 1.0 ng mL-1 for DBP and 3.30 ± 0.06 ng mL-1 and 11.0 ± 0.19 ng mL-1 for DEHP, respectively. Good recoveries in the range of 81.89 ± 0.17 to 109.5 ± 2.0% were achieved when the method was used to extract phthalate esters in five instant noodle and two rice soup samples.
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Affiliation(s)
- Warakorn Sukree
- Higher Education Research Promotion and National Research University Project of Thailand, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Center of Excellence for Innovation in Chemistry and Center of Excellence for Trace Analysis and Biosensor, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Dhassida Sooksawat
- Higher Education Research Promotion and National Research University Project of Thailand, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Center of Excellence for Innovation in Chemistry and Center of Excellence for Trace Analysis and Biosensor, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Proespichaya Kanatharana
- Higher Education Research Promotion and National Research University Project of Thailand, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Center of Excellence for Innovation in Chemistry and Center of Excellence for Trace Analysis and Biosensor, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Panote Thavarungkul
- Higher Education Research Promotion and National Research University Project of Thailand, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Center of Excellence for Innovation in Chemistry and Center of Excellence for Trace Analysis and Biosensor, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Department of Physics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Chongdee Thammakhet-Buranachai
- Higher Education Research Promotion and National Research University Project of Thailand, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Center of Excellence for Innovation in Chemistry and Center of Excellence for Trace Analysis and Biosensor, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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Ran D, Luo Y, Gan Z, Liu J, Yang J. Neural mechanisms underlying the deficit of learning and memory by exposure to Di(2-ethylhexyl) phthalate in rats. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:58-65. [PMID: 30822668 DOI: 10.1016/j.ecoenv.2019.02.043] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/20/2019] [Accepted: 02/13/2019] [Indexed: 06/09/2023]
Abstract
Di(2-ethylhexyl) phthalate (DEHP), as one of the most broadly representative phthalic acid esters, is used as a plasticizer in Polyvinyl chloride production. The exact neurotoxicologically effects of DEHP to human have not been adequately researched. In order to investigate the effects and mechanisms of DEHP exposure on neural circuit, the spatial learning and memory of Sprague Dawley (SD) rats was measured, and the cellular mechanisms underlying synaptic plasticity, cellular excitability and ion channels were detected. Our data showed that the spatial learning and memory was changed by DEHP (100 and 300 mg) treatment. Meanwhile, the frequency of mini Excitatory Postsynaptic Current (mEPSC) from CA3 pyramidal cells were significantly decreased by DEHP exposure (0.1 and 0.3 M); the firing threshold, membrane potential threshold, number, amplitude and latency of Action Potentials (Aps) of CA1 pyramidal cells were altered with the application of DEHP (0.1 and 0.3 M); furthermore, DEHP, both in 0.1 and 0.3 M could inhibit the voltage-gated potassium channel of CA1 pyramidal cells. Our results indicated that DEHP could impair the spatial learning and memory, and this impairment might due to the DEHP-induced suppression of the neuronal excitability and synaptic plasticity by inhibiting the voltage-gated potassium channel, supporting the hypothesis that DEHP could cause the disruption of neural function.
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Affiliation(s)
- Dongzhi Ran
- Department of Pharmacology, Chongqing Medical University, Chongqing 400016, PR China; The Key Laboratory of Biochemistry and Molecular Pharmacology, PR China
| | - Ying Luo
- Department of Pharmacology, Chongqing Medical University, Chongqing 400016, PR China; The Key Laboratory of Biochemistry and Molecular Pharmacology, PR China
| | - Zongjie Gan
- Department of Pharmacology, Chongqing Medical University, Chongqing 400016, PR China
| | - Jia Liu
- The Third Affiliated Hospital of Chongqing Medical University, Chongqing 401120, PR China
| | - Junqing Yang
- Department of Pharmacology, Chongqing Medical University, Chongqing 400016, PR China; The Key Laboratory of Biochemistry and Molecular Pharmacology, PR China.
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Li N, Papandonatos GD, Calafat AM, Yolton K, Lanphear BP, Chen A, Braun JM. Identifying periods of susceptibility to the impact of phthalates on children's cognitive abilities. ENVIRONMENTAL RESEARCH 2019; 172:604-614. [PMID: 30878731 PMCID: PMC6511335 DOI: 10.1016/j.envres.2019.03.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/28/2019] [Accepted: 03/04/2019] [Indexed: 05/23/2023]
Abstract
BACKGROUND Early-life phthalate exposures may adversely affect children's neurodevelopment by disrupting thyroid function, reducing gonadal hormone levels, or altering fatty acid concentrations in the brain. This study aimed to identify periods of heightened susceptibility during gestation, infancy, and childhood to the impact of phthalates on children's cognitive abilities. METHODS We used data from 253 mother-child pairs in the Health Outcomes and Measures of the Environment (HOME) Study (Cincinnati, Ohio), a longitudinal pregnancy and birth cohort. We quantified urinary concentrations of 11 phthalate metabolites in samples collected twice during gestation and 6 times during study visits when children were aged 1-8 years using a modified method of on-line solid phase extraction coupled with isotope dilution-high performance liquid chromatography-tandem mass spectrometry. We assessed children's intelligence (IQ) at ages 5 and 8 years using the Wechsler Preschool and Primary Scale of Intelligence-III and Wechsler Intelligence Scale for Children-IV, respectively. We estimated covariate-adjusted associations between a 1-standard deviation increase in log10-transformed urinary phthalate metabolite concentrations at each visit and children's IQ, adjusting for demographic, perinatal, and child factors; we tested for differences in these associations across visits using multiple informant models. RESULTS Associations between some phthalate metabolites and IQ varied by visit (phthalate x visit interaction p-values<0.20). The sum of di(2-ethylhexyl) phthalate metabolites (ΣDEHP), mono(3-carboxypropyl) phthalate, and monoethyl phthalate at age 3 years, and monobenzyl phthalate at 16 weeks gestation and child ages 3, 5, and 8 years were inversely associated with children's full-scale IQ. For example, each 1-standard deviation increase in ΣDEHP at age 3 was associated with a 1.9-point decrease in full-scale IQ (95% confidence interval: -3.7, -0.2). Mono-n-butyl phthalate and mono-isobutyl phthalate at age 4 years were positively associated with children's full-scale IQ. CONCLUSION Urinary concentrations of several phthalate metabolites at age 3 years, compared to other time periods, were more strongly associated with decreased cognitive abilities in these children.
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Affiliation(s)
- Nan Li
- Department of Epidemiology, Brown University, 121 South Main Street, Providence, RI, United States.
| | - George D Papandonatos
- Department of Biostatistics, Brown University, 121 South Main Street, Providence, RI, United States
| | - Antonia M Calafat
- National Center for Environmental Health, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA, United States
| | - Kimberly Yolton
- Department of Pediatrics, Division of General and Community Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH, United States
| | - Bruce P Lanphear
- Child and Family Research Institute, British Columbia Children's Hospital, 950 West 28th Ave, Vancouver, British Columbia, Canada; Faculty of Health Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada
| | - Aimin Chen
- Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, 160 Panzeca Way, Cincinnati, OH, United States
| | - Joseph M Braun
- Department of Epidemiology, Brown University, 121 South Main Street, Providence, RI, United States
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Shoaff JR, Calafat AM, Schantz SL, Korrick SA. Endocrine disrupting chemical exposure and maladaptive behavior during adolescence. ENVIRONMENTAL RESEARCH 2019; 172:231-241. [PMID: 30818232 PMCID: PMC7199588 DOI: 10.1016/j.envres.2018.12.053] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 12/19/2018] [Accepted: 12/21/2018] [Indexed: 05/24/2023]
Abstract
BACKGROUND Studies suggest that exposure to endocrine disrupting chemicals (EDCs), including phthalates, phenols, and parabens may influence childhood behavior, but the relationship during adolescence has not been assessed. OBJECTIVE We investigated the association between urinary biomarker concentrations of potential EDCs, including some phthalate and bisphenol A replacement chemicals, and behavior in adolescents. METHODS Participants were from the New Bedford Cohort (NBC), a prospective birth cohort of residents near the New Bedford Harbor Superfund site in Massachusetts. We measured urinary concentrations of 16 phthalate metabolites or replacements, 8 phenols, and 4 parabens in 205 NBC adolescents and estimated associations between select EDCs and adolescent behavior assessed with the Behavior Assessment System for Children, Second Edition -Teacher Rating Scale (BASC-2). Of note, up to 32 of the 205 in our assessment had missing outcome information imputed. RESULTS Increased urinary concentrations of the sum of 11 antiandrogenic phthalate metabolites were associated with an increase in maladaptive behaviors (Externalizing Behavior, Behavioral Symptoms Index, and Developmental Social Disorders or DSD), and a decrease in Adaptive Skills. For example, a doubling of urinary concentrations of antiandrogenic phthalate metabolites was associated with an increased risk of Externalizing Behavior (RR=1.04; 95% CI: 1.01-1.08). While associations were generally stronger in males, sex differences were not statistically significant. Urine concentrations of phenols and parabens were not associated with adverse behavior. CONCLUSION Our findings support the importance of exposure to antiandrogenic phthalates during adolescence as a potential correlate of maladaptive behaviors including Externalizing Behavior, DSD behaviors, and decrements in Adaptive Skills.
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Affiliation(s)
- Jessica R Shoaff
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
| | - Antonia M Calafat
- Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Susan L Schantz
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Susan A Korrick
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
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Zhang Q, Chen XZ, Huang X, Wang M, Wu J. The association between prenatal exposure to phthalates and cognition and neurobehavior of children-evidence from birth cohorts. Neurotoxicology 2019; 73:199-212. [PMID: 31004626 DOI: 10.1016/j.neuro.2019.04.007] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 04/12/2019] [Accepted: 04/15/2019] [Indexed: 01/12/2023]
Abstract
BACKGROUND Phthalate have been detected widely in the environment; while several studies have indicated that prenatal phthalate exposure has adverse effects on neurodevelopment, the results were inconsistent. OBJECTIVE We aimed to determine the current research status of the relationship between prenatal exposure to different types of phthalate and cognition and behavioral development in children. We conducted a systematic review to evaluate the current state of knowledge. METHODS We systematically searched PubMed, Web of Science, and EMBASE electronic databases up to May 2018 with manual searches of the references of retrieved publications and relevant reviews. Only birth cohort studies that reported on the association between phthalate exposure and cognitive or behavioral development were included in this review. We evaluated the risk of bias for each of the included studies using a modified instrument based on the Cochrane Collaboration's "Risk of Bias" tool. RESULT Twenty-six birth cohort studies met our inclusion criteria, nine of which investigated the impact of phthalate exposure during pregnancy on cognition, 13 on neurobehavior, and 4 on both cognition and neurobehavior. However, ten articles reported that the effect of prenatal exposure to phthalates on cognitive development was statistically significant, 15 articles reported that the effect of prenatal exposure to phthalates on neurobehavior was statistically significant. The effect of prenatal phthalate exposure on neurodevelopment differed according to sex, but the results are inconsistent, for instance, among the five studies investigating the association between mental development index (MDI) and Mono-n-butyl phthalate (MnBP), two of them showed a significantly decreasing MDI scores with increasing concentrations of MnBP among girls, but among boys one study showed the inverse association, another showed the positive association. CONCLUSION Di(2-ethylhexyl) phthalate, dibutyl phthalate, butyl-benzyl phthalate and di-ethyl phthalate exposure during pregnancy was associated with lower cognitive scores and worse behavior in offspring, and sex-specific effects on cognitive, psychomotor, and behavioral development were identified, especially the impact of phthalate exposure on neurobehavior in boys.
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Affiliation(s)
- Qi Zhang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China; Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Xin-Zhen Chen
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China; Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Xin Huang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China; Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Min Wang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China; Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Jing Wu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China; Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.
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Li X, Liu L, Wang H, Zhang X, Xiao T, Shen H. Phthalate exposure and cumulative risk in a Chinese newborn population. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:7763-7771. [PMID: 30673950 DOI: 10.1007/s11356-019-04216-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 01/09/2019] [Indexed: 06/09/2023]
Abstract
Phthalates have been attracted as a considerable attention in toxicological research as well as public health context due to their ubiquitous occurrence and potential adverse health effects. Newborns are susceptible to the environmental risk factors; however, data are still limited on newborn phthalate exposure and risk assessment worldwide, especially in China. This study was nested in a cross-sectional retrospective study of 1359 pregnant women recruited in Xiamen Maternity and Child Care Hospital, China, during June to July 2012. All urine samples from newborn were collected using disposal diapers during the first two postnatal days, and seven phthalate metabolites were measured by LC-ESI-MS/MS. Phthalate exposure and accumulation risk were evaluated based on the measured newborn urinary internal doses. The detection rate (96.5%) and the median concentration (17.5 ng/mL) of mono-n-butyl phthalate (MBP) were the highest, while monobenzyl phthalate (MBzP) concentration was the lowest with a detection rate (1.50%). By estimating the daily intakes of the parent phthalates, their EDI were 0.04, 0.10, 0.32, 0.00, and 0.12 μg/kg-bw/day for dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalates (DBP), benzyl butyl phthalate (BBzP), and di-(2-ethylhexyl) phthalate (DEHP), respectively. The newborns were commonly exposed to phthalates but no one exceeds the regulated tolerable daily intake (TDI) values in this large newborn population.
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Affiliation(s)
- Xueyan Li
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Liangpo Liu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Heng Wang
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhoushan Municipal Center for Disease Control and Prevention, Zhoushan, 316021, China
| | - Xueqin Zhang
- Xiamen Maternity and Child Health Care Hospital, Xiamen, 361003, China
| | - Tonghu Xiao
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
| | - Heqing Shen
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
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Lee DW, Kim MS, Lim YH, Lee N, Hong YC. Prenatal and postnatal exposure to di-(2-ethylhexyl) phthalate and neurodevelopmental outcomes: A systematic review and meta-analysis. ENVIRONMENTAL RESEARCH 2018; 167:558-566. [PMID: 30145432 DOI: 10.1016/j.envres.2018.08.023] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/09/2018] [Accepted: 08/16/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Di-(2-ethylhexyl) phthalate (DEHP), the most widely used phthalate, has recently been associated with neurodevelopmental disturbances in children. However, the risk is yet to be quantified. Therefore, a systematic review and meta-analysis focusing on the association between exposure to DEHP and neurodevelopmental outcomes is necessary, with particular attention to study design (longitudinal vs. cross-sectional). METHODS We performed a comprehensive literature search for associations between exposure to DEHP and neurodevelopmental outcomes. Among 106 published studies found in public databases, eight longitudinal studies and two cross-sectional studies were included in the meta-analysis. RESULTS We observed a statistically significant association between the concentrations of DEHP metabolites and the neurodevelopment outcomes of children among cross-sectional results, and found significant association between DEHP exposure measured in prenatal period and the psychomotor development outcomes measured later in childhood. CONCLUSIONS To our knowledge, this is the first meta-analysis of studies investigating the association between DEHP exposure and neurodevelopment in children. A need exists for more researches and a precautionary policy for potential health hazard of DEHP, the most commonly used phthalate, to promote healthier neurodevelopment in children.
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Affiliation(s)
- Dong-Wook Lee
- Department of Preventive Medicine, College of Medicine, Seoul National University, 103 Daehangno, Jongno-gu, Seoul 110-799, Republic of Korea
| | - Min-Seok Kim
- Department of Preventive Medicine, College of Medicine, Seoul National University, 103 Daehangno, Jongno-gu, Seoul 110-799, Republic of Korea
| | - Youn-Hee Lim
- Environmental Health Centre, College of Medicine, Seoul National University, Seoul, Republic of Korea; Institute of Environmental Medicine, Medical Research Centre, Seoul National University, Seoul, Republic of Korea
| | - Nami Lee
- Department of Psychiatry, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Yun-Chul Hong
- Department of Preventive Medicine, College of Medicine, Seoul National University, 103 Daehangno, Jongno-gu, Seoul 110-799, Republic of Korea; Environmental Health Centre, College of Medicine, Seoul National University, Seoul, Republic of Korea; Institute of Environmental Medicine, Medical Research Centre, Seoul National University, Seoul, Republic of Korea.
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Kim KN, Lim YH, Shin CH, Lee YA, Kim BN, Kim JI, Hwang IG, Hwang MS, Suh JH, Hong YC. Cohort Profile: The Environment and Development of Children (EDC) study: a prospective children’s cohort. Int J Epidemiol 2018; 47:1049-1050f. [DOI: 10.1093/ije/dyy070] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2018] [Indexed: 01/21/2023] Open
Affiliation(s)
- Kyoung-Nam Kim
- Institute of Public Health Medical Service, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Youn-Hee Lim
- Institute of Environmental Medicine, Seoul National University Medical Research Centre, Seoul, Republic of Korea
- Environmental Health Centre
| | - Choong Ho Shin
- Department of Paediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Young Ah Lee
- Department of Paediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Bung-Nyun Kim
- Department of Public Health Medical Services, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Johanna Inhyang Kim
- Department of Public Health Medical Services, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - In Gyun Hwang
- Food Safety Risk Assessment Division, National Institute of Food and Drug Safety Evaluation, Cheongwon, Republic of Korea
| | - Myung Sil Hwang
- Food Safety Risk Assessment Division, National Institute of Food and Drug Safety Evaluation, Cheongwon, Republic of Korea
| | - Jin-Hyang Suh
- Food Safety Risk Assessment Division, National Institute of Food and Drug Safety Evaluation, Cheongwon, Republic of Korea
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Institute of Environmental Medicine, Seoul National University Medical Research Centre, Seoul, Republic of Korea
- Environmental Health Centre
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Nakiwala D, Peyre H, Heude B, Bernard JY, Béranger R, Slama R, Philippat C. In-utero exposure to phenols and phthalates and the intelligence quotient of boys at 5 years. Environ Health 2018; 17:17. [PMID: 29458359 PMCID: PMC5819230 DOI: 10.1186/s12940-018-0359-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 01/29/2018] [Indexed: 05/23/2023]
Abstract
BACKGROUND There are concerns that developmental exposure to endocrine disrupting chemicals such as phenolic compounds and phthalates could affect child cognitive function. Epidemiological studies tackling this question have mainly focused on phthalate metabolites and bisphenol A, but not on the other phenolic compounds. Our study aimed to assess the relationship between in-utero exposure to phthalates, bisphenol A and other phenolic compounds (parabens, triclosan, dichlorophenols and benzophenone-3) and the Intelligence Quotient (IQ) of boys at 5-6 years. METHODS In 452 mother-son dyads from the French EDEN cohort, we measured 11 phthalate metabolites and 9 phenolic compounds (4 parabens, benzophenone-3, bisphenol A, 2 dichlorophenols and triclosan) in spot urine samples collected between 22 and 29 gestational weeks. Verbal and performance IQ of children were assessed at 5-6 years by a psychologist using the Wechsler Preschool and Primary Scale of Intelligence (WPPSI). We used adjusted Structural Equation Models (SEM) combined with Benjamini and Hochberg false discovery rate correction to assess the associations between maternal urine phenol and phthalate metabolite concentrations considered simultaneously and the boys' IQ. RESULTS No phenol or phthalate metabolite concentration was negatively associated with the boys' verbal or performance IQ (uncorrected p-values ≥0.09). Mono(3-carboxypropyl) phthalate tended to be associated with increased verbal IQ (β = 0.136, 95% confidence interval, 0.01; 0.27). This association disappeared after correction for multiple comparison (corrected p-value, 0.71). CONCLUSION Our results did not provide evidence of an inverse association between in-utero exposure to phenols or phthalates and verbal and performance IQ among boys. Since phenols and phthalates may have sex-specific effects, these null findings cannot be generalized to girls. Limitations included use of a single spot urine sample to assess exposures and lack of consideration of postnatal exposures.
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Affiliation(s)
- Dorothy Nakiwala
- Institute for Advanced Biosciences (IAB), INSERM U1209, CNRS UMR 5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Hugo Peyre
- Assistance Publique-Hôpitaux de Paris, Robert Debré Hospital, Child and Adolescent Psychiatry Department, Paris, France
- Cognitive Sciences and Psycholinguistic Laboratory, Ecole Normale Supérieure, Paris, France
| | - Barbara Heude
- U1153 Epidemiology and Biostatistics Sorbonne Paris Cité Research Centre (CRESS), Early Origin of the Child’s Health and Development (ORCHAD) Team, Inserm, Villejuif, France
- Université Paris Descartes, Villejuif, France
| | - Jonathan Y. Bernard
- U1153 Epidemiology and Biostatistics Sorbonne Paris Cité Research Centre (CRESS), Early Origin of the Child’s Health and Development (ORCHAD) Team, Inserm, Villejuif, France
- Université Paris Descartes, Villejuif, France
- Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Rémi Béranger
- Inserm U1085–IRSET, Université Rennes 1, Rennes, France
| | - Rémy Slama
- Institute for Advanced Biosciences (IAB), INSERM U1209, CNRS UMR 5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Claire Philippat
- Institute for Advanced Biosciences (IAB), INSERM U1209, CNRS UMR 5309, Université Grenoble Alpes, 38000 Grenoble, France
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Huang CF, Wang IJ. Changes in Urinary Phthalate Metabolite Levels Before and After the Phthalate Contamination Event and Identification of Exposure Sources in a Cohort of Taiwanese Children. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14080935. [PMID: 28825610 PMCID: PMC5580637 DOI: 10.3390/ijerph14080935] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 08/13/2017] [Accepted: 08/15/2017] [Indexed: 11/16/2022]
Abstract
In 2011, the Taiwan Food and Drug Administration inadvertently discovered that, for decades, manufacturers had replaced expensive natural emulsifiers in food products with diethylhexyl phthalate (DEHP). We wanted to compare urinary phthalate metabolite levels of children before and after the DEHP food contamination event and identify source(s) of phthalate exposure in addition to the illegal food additives. In the present study, morning urine samples were collected from a cohort of 453 children in 2010 in Taipei. After the DEHP food contamination event, there were 200 cohort children left at follow-up in 2013. The geometric means (GMs) of urinary mono(2-ethyl-5-hydroxyhexyl) phthalate (5OH-MEHP) levels before and after the event were 9.39 and 13.34 µg/g of creatinine, respectively, with no significant difference (p = 0.093). After the DEHP food contamination event, we found that urinary phthalate metabolite levels were significantly higher in people who frequently consumed microwave-heated food and used fragrance-containing products (p < 0.05). In addition, children who did not frequently wash hands before eating had significantly higher urinary phthalate metabolite levels than those who did (p < 0.05). These results demonstrate that urinary phthalate metabolite levels did not decrease after the DEHP food contamination event, thus, other sources must contribute to phthalate exposure in daily life. Public awareness of approaches to reducing phthalate exposure is necessary.
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Affiliation(s)
- Chian-Feng Huang
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei 10055, Taiwan.
- Taoyuan Psychiatric Center, Ministry of Health and Welfare, Taoyuan 33058, Taiwan.
| | - I-Jen Wang
- Department of Pediatrics, Taipei Hospital, Ministry of Health and Welfare, Taipei 11267, Taiwan.
- Institute of Environmental & Occupational Health Sciences, School of Medicine, National Yang-Ming University, Taipei 100044, Taiwan.
- Department of Health Risk Management, China Medical University, Taichung 110001, Taiwan.
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