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Wang X, Nag R, Brunton NP, Bakar Siddique MA, Harrison SM, Monahan FJ, Cummins E. Hazard characterization of bisphenol A (BPA) based on rodent models - Multilevel meta-analysis and dose-response analysis for reproductive toxicity. Food Chem Toxicol 2023; 172:113574. [PMID: 36566970 DOI: 10.1016/j.fct.2022.113574] [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: 10/15/2022] [Revised: 12/07/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
Bisphenol A (BPA) is a widely used synthetic industrial compound frequently detected in food. Dietary exposure to BPA has been recognised as a potential health concern. However, there are uncertainties regarding BPA toxicity. The primary objective of this study was to summarise and analyse multiple toxicity endpoints of adverse reproductive effects caused by BPA exposure in rodent models. Therefore, a multilevel meta-analysis and subsequent dose-response analysis were conducted. Relevant articles published in English between 2012 and 2021 were collected from online databases, viz. Scopus, EmBase, Web of Science, and PubMed. In total, 41 studies were included for statistical analysis. All statistical analyses were performed using open-source RStudio packages. Summary effects indicated the statistical significance of BPA exposure on decreased sperm concentration (Hedges' g: -1.35) and motility (Hedges' g: -1.12) on average, while no significant effects were observed on the absolute and relative weight of male and female reproductive organs. The lowest mean toxicological reference dose values of 0.0011 mg (kg bw)-1 day-1 was proposed for BPA exposure on sperm concentration from the dose-response model. In conclusion, potential health risks from BPA exposure were shown with regards to reproductive toxicity, especially that sperm concentration and sperm motility require further attention.
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Affiliation(s)
- Xin Wang
- School of Biosystems and Food Engineering, Agriculture and Food Science Centre, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Rajat Nag
- School of Biosystems and Food Engineering, Agriculture and Food Science Centre, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Nigel P Brunton
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Md Abu Bakar Siddique
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Sabine M Harrison
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Frank J Monahan
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Enda Cummins
- School of Biosystems and Food Engineering, Agriculture and Food Science Centre, University College Dublin, Belfield, Dublin 4, Ireland.
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2
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Patisaul HB. Endocrine disrupting chemicals (EDCs) and the neuroendocrine system: Beyond estrogen, androgen, and thyroid. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2021; 92:101-150. [PMID: 34452685 DOI: 10.1016/bs.apha.2021.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Hundreds of anthropogenic chemicals occupy our bodies, a situation that threatens the health of present and future generations. This chapter focuses on endocrine disrupting compounds (EDCs), both naturally occurring and man-made, that affect the neuroendocrine system to adversely impact health, with an emphasis on reproductive and metabolic pathways. The neuroendocrine system is highly sexually dimorphic and essential for maintaining homeostasis and appropriately responding to the environment. Comprising both neural and endocrine components, the neuroendocrine system is hormone sensitive throughout life and touches every organ system in the body. The integrative nature of the neuroendocrine system means that EDCs can have multi-system effects. Additionally, because gonadal hormones are essential for the sex-specific organization of numerous neuroendocrine pathways, endocrine disruption of this programming can lead to permanent deficits. Included in this review is a brief history of the neuroendocrine disruption field and a thorough discussion of the most common and less well understood neuroendocrine disruption modes of action. Also provided are extensive examples of how EDCs are likely contributing to neuroendocrine disorders such as obesity, and evidence that they have the potential for multi-generational effects.
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Affiliation(s)
- Heather B Patisaul
- Department of Biological Sciences, Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, United States.
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3
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Vandenberg LN. Endocrine disrupting chemicals: strategies to protect present and future generations. Expert Rev Endocrinol Metab 2021; 16:135-146. [PMID: 33973826 DOI: 10.1080/17446651.2021.1917991] [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] [Received: 03/01/2021] [Accepted: 04/12/2021] [Indexed: 12/22/2022]
Abstract
Introduction: Endocrine-disrupting chemicals (EDCs) are chemicals that alter the actions of hormones. In the 21st Century, numerous expert groups of clinicians, scientists, and environmental activists have called for action to protect present and future generations from the harm induced by EDC exposures. These demands for regulatory responses come because of the strong weight of the evidence from epidemiology, wildlife, and controlled laboratory studies.Areas covered: In this review, we examine the conclusions drawn by experts from different scientific and medical disciplines. We also address several areas where recent findings or work has changed the landscape of EDC work including new approaches to identify and evaluate the evidence for EDCs using a key characteristics approach, the need to expand our understanding of vulnerable periods of development, and the increasing concern that traditional methods used to evaluate toxicity of environmental chemicals are insufficient for EDCs and how collaborative science could help to address these gaps.Expert opinion: The science is clear: there is more than enough evidence to demonstrate that EDCs affect the health of humans and wildlife. Waiting to act is a decision that puts the health of current and future generations at risk.
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Affiliation(s)
- Laura N Vandenberg
- School of Public Health & Health Sciences, Department of Environmental Health Sciences, University of Massachusetts, Amherst, MA USA
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4
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Rosca A, Coronel R, Moreno M, González R, Oniga A, Martín A, López V, González MDC, Liste I. Impact of environmental neurotoxic: current methods and usefulness of human stem cells. Heliyon 2020; 6:e05773. [PMID: 33376823 PMCID: PMC7758368 DOI: 10.1016/j.heliyon.2020.e05773] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 11/10/2020] [Accepted: 12/15/2020] [Indexed: 12/12/2022] Open
Abstract
The development of central nervous system is a highly coordinated and complex process. Any alteration of this process can lead to disturbances in the structure and function of the brain, which can cause deficits in neurological development, resulting in neurodevelopmental disorders, including, for example, autism or attention-deficit hyperactivity disorder. Exposure to certain chemicals during the fetal period and childhood is known to cause developmental neurotoxicity and has serious consequences that persist into adult life. For regulatory purposes, determination of the potential for developmental neurotoxicity is performed according the OECD Guideline 426, in which the test substance is administered to animals during gestation and lactation. However, these animal models are expensive, long-time consuming and may not reflect the physiology in humans; that makes it an unsustainable model to test the large amount of existing chemical products, hence alternative models to the use of animals are needed. One of the most promising methods is based on the use of stem cell technology. Stem cells are undifferentiated cells with the ability to self-renew and differentiate into more specialized cell types. Because of these properties, these cells have gained increased attention as possible therapeutic agents or as disease models. Here, we provide an overview of the current models both animal and cellular, available to study developmental neurotoxicity and review in more detail the usefulness of human stem cells, their properties and how they are becoming an alternative to evaluate and study the mechanisms of action of different environmental toxicants.
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Affiliation(s)
- Andreea Rosca
- Unidad de Regeneración Neural, Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain
- Toxicología Ambiental, Centro Nacional de Sanidad Ambiental, Instituto de Salud Carlos III, Madrid, Spain
| | - Raquel Coronel
- Unidad de Regeneración Neural, Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Miryam Moreno
- Unidad de Regeneración Neural, Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Rosa González
- Unidad de Biología Computacional, Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Andreea Oniga
- Toxicología Ambiental, Centro Nacional de Sanidad Ambiental, Instituto de Salud Carlos III, Madrid, Spain
| | - Alberto Martín
- Instituto de Investigación de Enfermedades Raras (IIER), Instituto de Salud Carlos III, Madrid, Spain
| | - Victoria López
- Unidad de Biología Computacional, Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain
| | - María del Carmen González
- Toxicología Ambiental, Centro Nacional de Sanidad Ambiental, Instituto de Salud Carlos III, Madrid, Spain
| | - Isabel Liste
- Unidad de Regeneración Neural, Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain
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5
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Sex-biased impact of endocrine disrupting chemicals on behavioral development and vulnerability to disease: Of mice and children. Neurosci Biobehav Rev 2020; 121:29-46. [PMID: 33248148 DOI: 10.1016/j.neubiorev.2020.11.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 10/16/2020] [Accepted: 11/14/2020] [Indexed: 12/14/2022]
Abstract
Sex is a fundamental biological characteristic that influences many aspects of an organism's phenotype, including neurobiological functions and behavior as a result of species-specific evolutionary pressures. Sex differences have strong implications for vulnerability to disease and susceptibility to environmental perturbations. Endocrine disrupting chemicals (EDCs) have the potential to interfere with sex hormones functioning and influence development in a sex specific manner. Here we present an updated descriptive review of findings from animal models and human studies regarding the current evidence for altered sex-differences in behavioral development in response to early exposure to EDCs, with a focus on bisphenol A and phthalates. Overall, we show that animal and human studies have a good degree of consistency and that there is strong evidence demonstrating that EDCs exposure during critical periods of development affect sex differences in emotional and cognitive behaviors. Results are more heterogeneous when social, sexual and parental behaviors are considered. In order to pinpoint sex differences in environmentally-driven disease vulnerabilities, researchers need to consider sex-biased developmental effects of EDCs.
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6
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Im J, Rizzo CB, de Barros FPJ. Resilience of groundwater systems in the presence of Bisphenol A under uncertainty. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 727:138363. [PMID: 32498202 DOI: 10.1016/j.scitotenv.2020.138363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/29/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Assessing the health risks associated with emerging contaminants in groundwater systems is a complex issue that has been receiving increased attention in indirect potable reuse applications. Among several emerging contaminants, our study focuses on developing a numerical model that aims to compute the transport characteristics of Bisphenol A (BPA) in a 3D spatially heterogeneous aquifer under uncertainty. Traditional approaches that characterize the health risk of BPA to humans rely on the monotonic dose-response (MDR) relationship with a regulatory dose limit. Recent public health studies indicate that BPA can cause endocrine-related health effects in specific low dose ranges, which requires the consideration of the non-monotonic dose-response (NMDR) model. This work investigates the impact of different BPA DR models (i.e., monotonic vs. non-monotonic) on the resilience of the aquifer against BPA contamination in the presence of hydrogeological heterogeneity. For the resilience estimation, a systematic stochastic methodology linking risk characterization to aquifer resilience is established. Our results show the importance of the interplay between the DR models and aquifer heterogeneity on controlling the uncertainty of the resilience loss RL (d) at a specified environmentally sensitive target. In the increased level of aquifer heterogeneity, the uncertainty bounds are higher for RL estimated through the NMDR model as opposed to the MDR model. Moreover, RL is controlled by η (-), the ratio of the volumetric flow rate at the source zone to the average flow rate at the background aquifer. In a risk management perspective, the consideration of the NMDR model needs to be emphasized due to its impact on the uncertainty of RL. A critical case is when the land use of a contamination site indicates a large number of the vulnerable population to endocrine-related health effects. In this case, η as an indicator of aquifer resilience can reduce the uncertainty of RL.
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Affiliation(s)
- Jinwoo Im
- Department of Civil and Environmental Engineering, The University of Southern California, Kaprielian Hall 224B, 3620 South Vermont Ave., Los Angeles, CA 90089, USA.
| | - Calogero B Rizzo
- Department of Civil and Environmental Engineering, The University of Southern California, Kaprielian Hall 224B, 3620 South Vermont Ave., Los Angeles, CA 90089, USA.
| | - Felipe P J de Barros
- Department of Civil and Environmental Engineering, The University of Southern California, Kaprielian Hall 224B, 3620 South Vermont Ave., Los Angeles, CA 90089, USA.
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7
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Guo J, Wu C, Zhang J, Qi X, Lv S, Jiang S, Zhou T, Lu D, Feng C, Chang X, Zhang Y, Cao Y, Wang G, Zhou Z. Prenatal exposure to mixture of heavy metals, pesticides and phenols and IQ in children at 7 years of age: The SMBCS study. ENVIRONMENT INTERNATIONAL 2020; 139:105692. [PMID: 32251899 DOI: 10.1016/j.envint.2020.105692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVE Prenatal exposure to heavy metals, pesticides and phenols has been suggested to interfere with neurodevelopment, but the neurotoxicity of their mixtures is still unclear. We aimed to elucidate the associations of maternal urinary concentrations of selected chemical mixtures with intelligence quotient (IQ) in children. METHODS Maternal urinary concentrations of selected heavy metals, pesticide metabolites, and phenols were quantified in pregnant women who participated in the Sheyang Mini Birth Cohort Study (SMBCS) from June 2009 to January 2010. At age 7 years, child's IQ score was assessed using the Chinese version of Wechsler Intelligence Scale for Children (C-WISC) by trained pediatricians. Generalized linear regression models (GLM), Bayesian kernel machine regression (BKMR) models and elastic net regression (ENR) models were used to assess the associations of urinary concentrations individual chemicals and their mixtures with IQ scores of the 7-year-old children. RESULTS Of 326 mother-child pairs, single-chemical models indicated that prenatal urinary concentrations of lead (Pb) and bisphenol A (BPA) were significantly negatively associated with full intelligence quotient (FIQ) among children aged 7 years [β = -2.31, 95% confidence interval (CI): -4.13, -0.48; p = 0.013, sex interaction p-value = 0.076; β = -1.18, 95% CI: -2.21, -0.15; p = 0.025; sex interaction p-value = 0.296, for Pb and BPA, respectively]. Stratified analysis by sex indicated that the associations were only statistically significant in boys. In multi-chemical BKMR and ENR models, statistically significant inverse association was found between prenatal urinary Pb level and boy's FIQ scores at 7 years. Furthermore, BKMR analysis indicated that the overall mixture was associated with decreases in boy's IQ when all the chemicals' concentrations were at their 75th percentiles or higher, compared to at their 50th percentiles. ENR models revealed that maternal urinary Pb levels were statistically significantly associated with lower FIQ scores (β = -2.20, 95% CI: -4.20, -0.20; p = 0.031). CONCLUSIONS Prenatal exposure to selected chemical mixtures may affect intellectual performance at 7 years of age, particularly in boys. Pb and BPA were suspected as primary chemicals associated with child neurodevelopment.
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Affiliation(s)
- Jianqiu Guo
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China
| | - Chunhua Wu
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China.
| | - Jiming Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China
| | - Xiaojuan Qi
- Zhejiang Provincial Center for Disease Control and Prevention, No. 3399 Binsheng Road, Hangzhou 310051, China
| | - Shenliang Lv
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China
| | - Shuai Jiang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China
| | - Tong Zhou
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China
| | - Dasheng Lu
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai 200336, China
| | - Chao Feng
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai 200336, China
| | - Xiuli Chang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China
| | - Yubin Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China
| | - Yang Cao
- Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro 70182, Sweden
| | - Guoquan Wang
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai 200336, China
| | - Zhijun Zhou
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai 200032, China.
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8
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Tavakkoli A, Abnous K, Vahdati Hassani F, Hosseinzadeh H, Birner-Gruenberger R, Mehri S. Alteration of protein profile in cerebral cortex of rats exposed to bisphenol a: a proteomics study. Neurotoxicology 2020; 78:1-10. [DOI: 10.1016/j.neuro.2020.01.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 01/26/2020] [Accepted: 01/29/2020] [Indexed: 12/17/2022]
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9
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Qiu J, Sun Y, Sun W, Wang Y, Fan T, Yu J. Neonatal exposure to bisphenol A advances pubertal development in female rats. Mol Reprod Dev 2020; 87:503-511. [PMID: 32109339 DOI: 10.1002/mrd.23329] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 02/09/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Jing Qiu
- Department of Integrative MedicineChildren's Hospital of Fudan University Shanghai China
| | - Yanyan Sun
- Department of Integrative MedicineChildren's Hospital of Fudan University Shanghai China
| | - Wen Sun
- Department of Integrative MedicineChildren's Hospital of Fudan University Shanghai China
| | - Yonghong Wang
- Department of Integrative MedicineChildren's Hospital of Fudan University Shanghai China
| | - Teng Fan
- Department of Integrative MedicineChildren's Hospital of Fudan University Shanghai China
| | - Jian Yu
- Department of Integrative MedicineChildren's Hospital of Fudan University Shanghai China
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10
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Ågerstrand M, Arnold K, Balshine S, Brodin T, Brooks BW, Maack G, McCallum ES, Pyle G, Saaristo M, Ford AT. Emerging investigator series: use of behavioural endpoints in the regulation of chemicals. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:49-65. [PMID: 31898699 DOI: 10.1039/c9em00463g] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Interest in behavioural ecotoxicology is growing, partly due to technological and computational advances in recording behaviours but also because of improvements of detection capacity facilitating reporting effects at environmentally relevant concentrations. The peer-reviewed literature now contains studies investigating the effects of chemicals, including pesticides and pharmaceuticals, on migration, dispersal, aggression, sociability, reproduction, feeding and anti-predator behaviours in vertebrates and invertebrates. To understand how behavioural studies could be used in regulatory decision-making we: (1) assessed the legal obstacles to using behavioural endpoints in EU chemicals regulation; (2) analysed the known cases of use of behavioural endpoints in EU chemicals regulation; and (3) provided examples of behavioural endpoints of relevance for population level effects. We conclude that the only legal obstacle to the use of behavioural endpoints in EU chemicals regulation is whether an endpoint is considered to be relevant at the population level or not. We also conclude that ecotoxicity studies investigating behavioural endpoints are occasionally used in the EU chemicals regulation, and underscore that behavioural endpoints can be relevant at the population level. To improve the current use of behavioural studies in regulatory decision-making contribution from all relevant stakeholders is required. We have the following recommendations: (1) researchers should conduct robust, well-designed and transparent studies that emphasize the relevance of the study for regulation of chemicals; (2) editors and scientific journals should promote detailed, reliable and clearly reported studies; (3) regulatory agencies and the chemical industry need to embrace new behavioural endpoints of relevance at the population level.
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Affiliation(s)
- Marlene Ågerstrand
- Department of Environmental Science (ACES), Stockholm University, Stockholm, Sweden.
| | - Kathryn Arnold
- Department of Environment and Geography, University of York, York, UK
| | - Sigal Balshine
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Canada
| | - Tomas Brodin
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences (SLU), Umeå, Sweden
| | - Bryan W Brooks
- Department of Environmental Science, Institute of Biomedical Studies, Baylor University, Waco, TX, USA and School of Environment, Jinan University, Guangzhou, China
| | - Gerd Maack
- Department of Pharmaceuticals, German Environment Agency (UBA), Dessau, Germany
| | - Erin S McCallum
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences (SLU), Umeå, Sweden
| | - Greg Pyle
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB, Canada
| | - Minna Saaristo
- School of Biological Sciences, Monash University, Victoria, Australia
| | - Alex T Ford
- Institute of Marine Sciences, University of Portsmouth, Portsmouth, UK
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11
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Xu T, Yin D. The unlocking neurobehavioral effects of environmental endocrine-disrupting chemicals. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.coemr.2019.04.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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12
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Shu L, Meng Q, Diamante G, Tsai B, Chen YW, Mikhail A, Luk H, Ritz B, Allard P, Yang X. Prenatal Bisphenol A Exposure in Mice Induces Multitissue Multiomics Disruptions Linking to Cardiometabolic Disorders. Endocrinology 2019; 160:409-429. [PMID: 30566610 PMCID: PMC6349005 DOI: 10.1210/en.2018-00817] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 12/13/2018] [Indexed: 12/21/2022]
Abstract
The health impacts of endocrine-disrupting chemicals (EDCs) remain debated, and their tissue and molecular targets are poorly understood. In this study, we leveraged systems biology approaches to assess the target tissues, molecular pathways, and gene regulatory networks associated with prenatal exposure to the model EDC bisphenol A (BPA). Prenatal BPA exposure at 5 mg/kg/d, a dose below most reported no-observed-adverse-effect levels, led to tens to thousands of transcriptomic and methylomic alterations in the adipose, hypothalamus, and liver tissues in male offspring in mice, with cross-tissue perturbations in lipid metabolism as well as tissue-specific alterations in histone subunits, glucose metabolism, and extracellular matrix. Network modeling prioritized main molecular targets of BPA, including Pparg, Hnf4a, Esr1, Srebf1, and Fasn as well as numerous less studied targets such as Cyp51 and long noncoding RNAs across tissues, Fa2h in hypothalamus, and Nfya in adipose tissue. Lastly, integrative analyses identified the association of BPA molecular signatures with cardiometabolic phenotypes in mouse and human. Our multitissue, multiomics investigation provides strong evidence that BPA perturbs diverse molecular networks in central and peripheral tissues and offers insights into the molecular targets that link BPA to human cardiometabolic disorders.
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Affiliation(s)
- Le Shu
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California
- Molecular, Cellular, and Integrative Physiology Interdepartmental Program, University of California, Los Angeles, Los Angeles, California
| | - Qingying Meng
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California
| | - Graciel Diamante
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California
| | - Brandon Tsai
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California
| | - Yen-Wei Chen
- Molecular Toxicology Interdepartmental Program, University of California, Los Angeles, Los Angeles, California
| | - Andrew Mikhail
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California
| | - Helen Luk
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California
| | - Beate Ritz
- Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California
- Institute for Society and Genetics, University of California, Los Angeles, Los Angeles, California
| | - Patrick Allard
- Molecular Toxicology Interdepartmental Program, University of California, Los Angeles, Los Angeles, California
- Institute for Society and Genetics, University of California, Los Angeles, Los Angeles, California
| | - Xia Yang
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California
- Molecular, Cellular, and Integrative Physiology Interdepartmental Program, University of California, Los Angeles, Los Angeles, California
- Molecular Toxicology Interdepartmental Program, University of California, Los Angeles, Los Angeles, California
- Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, Los Angeles, California
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13
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Vandenberg LN. Low dose effects challenge the evaluation of endocrine disrupting chemicals. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2018.11.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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14
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Mhaouty-Kodja S, Belzunces LP, Canivenc MC, Schroeder H, Chevrier C, Pasquier E. Impairment of learning and memory performances induced by BPA: Evidences from the literature of a MoA mediated through an ED. Mol Cell Endocrinol 2018; 475:54-73. [PMID: 29605460 DOI: 10.1016/j.mce.2018.03.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 03/28/2018] [Accepted: 03/28/2018] [Indexed: 11/29/2022]
Abstract
Many rodent studies and a few non-human primate data report impairments of spatial and non-spatial memory induced by exposure to bisphenol A (BPA), which are associated with neural modifications, particularly in processes involved in synaptic plasticity. BPA-induced alterations involve disruption of the estrogenic pathway as established by reversal of BPA-induced effects with estrogenic receptor antagonist or by interference of BPA with administered estradiol in ovariectomized animals. Sex differences in hormonal impregnation during critical periods of development and their influence on maturation of learning and memory processes may explain the sexual dimorphism observed in BPA-induced effects in some studies. Altogether, these data highly support the plausibility that alteration of learning and memory and synaptic plasticity by BPA is essentially mediated by disturbance of the estrogenic pathways. As memory function in humans involves similar signaling pathways, this mode of action of BPA has the potential to alter human cognitive abilities.
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Affiliation(s)
- Sakina Mhaouty-Kodja
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine, Institut de Biologie Paris Seine, 75005 Paris, France
| | - Luc P Belzunces
- INRA, Laboratoire de Toxicologie Environnementale, UR 406 A&E, CS 40509, 84914 Avignon Cedex 9, France
| | - Marie-Chantal Canivenc
- Centre des Sciences du Goût et de l'Alimentation, INRA, CNRS, agrosup, Université de Bourgogne, Franche-Comté, Dijon, 21000, France
| | - Henri Schroeder
- Calbinotox, EA7488, Faculté des Sciences et Technologies, Université de Lorraine, 54500, Vandoeuvre les Nancy, France
| | - Cécile Chevrier
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
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15
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Rytel L. The Influence of Bisphenol A (BPA) on Neuregulin 1-Like Immunoreactive Nerve Fibers in the Wall of Porcine Uterus. Int J Mol Sci 2018; 19:ijms19102962. [PMID: 30274171 PMCID: PMC6213500 DOI: 10.3390/ijms19102962] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/22/2018] [Accepted: 09/24/2018] [Indexed: 12/14/2022] Open
Abstract
Bisphenol A (BPA), a substance commonly used in the manufacture of plastics, shows multidirectional negative effects on humans and animals. Due to similarities to estrogens, BPA initially leads to disorders in the reproductive system. On the other hand, it is known that neuregulin 1 (NRG-1) is an active substance which enhances the survivability of cells, inhibits apoptosis, and protects tissues against damaging factors. Because the influence of BPA on the nervous system has also been described, the aim of the present study was to investigate for the first time the influence of various doses of BPA on neuregulin 1-like immunoreactive (NRG-1-LI) nerves located in the porcine uterus using the routine single- and double-immunofluorescence technique. The obtained results have shown that BPA increases the number and affects the neurochemical characterization of NRG-1-LI in the uterus, and changes are visible even under the impact of small doses of this toxin. The character of observed changes depended on the dose of BPA and the part of the uterus studied. These observations suggest that NRG-1 in nerves supplying the uterus may play roles in adaptive and protective mechanisms under the impact of BPA.
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Affiliation(s)
- Liliana Rytel
- Department of Internal Disease with Clinic, Faculty of Veterinary Medicine, University of Warmia and Mazury, ul. Oczapowskiego 14, 10-719 Olsztyn, Poland.
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16
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Bal-Price A, Pistollato F, Sachana M, Bopp SK, Munn S, Worth A. Strategies to improve the regulatory assessment of developmental neurotoxicity (DNT) using in vitro methods. Toxicol Appl Pharmacol 2018; 354:7-18. [PMID: 29476865 PMCID: PMC6095942 DOI: 10.1016/j.taap.2018.02.008] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/05/2018] [Accepted: 02/13/2018] [Indexed: 01/23/2023]
Abstract
Currently, the identification of chemicals that have the potential to induce developmental neurotoxicity (DNT) is based on animal testing. Since at the regulatory level, systematic testing of DNT is not a standard requirement within the EU or USA chemical legislation safety assessment, DNT testing is only performed in higher tiered testing triggered based on chemical structure activity relationships or evidence of neurotoxicity in systemic acute or repeated dose toxicity studies. However, these triggers are rarely used and, in addition, do not always serve as reliable indicators of DNT, as they are generally based on observations in adult rodents. Therefore, there is a pressing need for developing alternative methodologies that can reliably support identification of DNT triggers, and more rapidly and cost-effectively support the identification and characterization of chemicals with DNT potential. We propose to incorporate mechanistic knowledge and data derived from in vitro studies to support various regulatory applications including: (a) the identification of potential DNT triggers, (b) initial chemical screening and prioritization, (c) hazard identification and characterization, (d) chemical biological grouping, and (e) assessment of exposure to chemical mixtures. Ideally, currently available cellular neuronal/glial models derived from human induced pluripotent stem cells (hiPSCs) should be used as they allow evaluation of chemical impacts on key neurodevelopmental processes, by reproducing different windows of exposure during human brain development. A battery of DNT in vitro test methods derived from hiPSCs could generate valuable mechanistic data, speeding up the evaluation of thousands of compounds present in industrial, agricultural and consumer products that lack safety data on DNT potential.
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Affiliation(s)
- Anna Bal-Price
- European Commission, Joint Research Centre (JRC), Ispra, Italy.
| | | | - Magdalini Sachana
- Organisation for Economic Co-operation and Development (OECD), 2 rue André Pascal, 75775 Paris, Cedex 16, France
| | | | - Sharon Munn
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Andrew Worth
- European Commission, Joint Research Centre (JRC), Ispra, Italy
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17
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Liang Y, Li J, Jin T, Gu T, Zhu Q, Hu Y, Yang Y, Li J, Wu D, Jiang K, Xu X. Bisphenol-A inhibits improvement of testosterone in anxiety- and depression-like behaviors in gonadectomied male mice. Horm Behav 2018; 102:129-138. [PMID: 29778459 DOI: 10.1016/j.yhbeh.2018.05.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/20/2018] [Accepted: 05/15/2018] [Indexed: 11/30/2022]
Abstract
Bisphenol-A (BPA) is a well-known environmental endocrine disruptor. Developmental exposure to BPA affected a variety of behaviors in multiple model organisms. Our recent study found that exposure to BPA during adulthood aggravated anxiety- and depression-like states in male mice but not in females. In this study, 11-w-old gonadectomied (GDX) male mice daily received subcutaneous injections of testosterone propionate (TP, 0.5 mg/kg), TP and BPA (0.04, 0.4, or 4 mg/kg), or vehicle for 45 days. BPA (0.4 or 4 mg/kg) did not affect the elevated plus maze task of GDX mice but shortened the time on open arms and decreased the frequency of head dips of sham and TP-GDX mice. In forced swim task, BPA prolonged the total time of immobility of both sham and TP-GDX mice but not GDX mice. In addition, BPA reduced the levels of T in the serum and the brain of sham and TP-GDX mice. Western blot analysis further showed that BPA reduced the levels of androgen receptor (AR) and GABA(A)α2 receptor of the hippocampus and the amygdala in sham and inhibited the rescue of TP in these proteins levels of GDX mice. Meanwhile, BPA decreased the level of phospho-ERK1/2 in these two brain regions of sham and TP-GDX mice. These results suggest that long-term exposure to BPA inhibited TP-improved anxiety- and depression-like behaviors in GDX male mice. The down-regulated levels of GABA(A)α2 receptor and AR and an inhibited activity of ERK1/2 pathway in the hippocampus and the amygdala may be involved in these process.
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Affiliation(s)
- Yvfeng Liang
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Jiahong Li
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Tao Jin
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Ting Gu
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Qingjie Zhu
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Yizhong Hu
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Yang Yang
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Jisui Li
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Donghong Wu
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Kesheng Jiang
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China
| | - Xiaohong Xu
- Chemistry and Life Sciences College, Key Laboratory of Wildlife Biotechnology and Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, PR China; Zhejiang Provincial Key Laboratory of Ecology, Zhejiang Normal University, PR China.
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18
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Dere E, Anderson LM, Huse SM, Spade DJ, McDonnell-Clark E, Madnick SJ, Hall SJ, Camacho L, Lewis SM, Vanlandingham MM, Boekelheide K. Effects of continuous bisphenol A exposure from early gestation on 90 day old rat testes function and sperm molecular profiles: A CLARITY-BPA consortium study. Toxicol Appl Pharmacol 2018; 347:1-9. [PMID: 29596923 DOI: 10.1016/j.taap.2018.03.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 02/28/2018] [Accepted: 03/19/2018] [Indexed: 12/17/2022]
Abstract
Bisphenol A (BPA) is a ubiquitous industrial chemical that has been identified as an endocrine disrupting compound (EDC). There is growing concern that early life exposures to EDCs, such as BPA, can adversely affect the male reproductive tract and function. This study was conducted as part of the Consortium Linking Academic and Regulatory Insights on BPA Toxicity (CLARITY-BPA) to further delineate the toxicities associated with continuous exposure to BPA from early gestation, and to comprehensively examine the elicited effects on testes and sperm. NCTR Sprague Dawley rat dams were gavaged from gestational day (GD) 6 until parturition, and their pups were directly gavaged daily from postnatal day (PND) 1 to 90 with BPA (2.5, 25, 250, 2500, 25,000, 250,000 μg/kg/d) or vehicle control. At PND 90, the testes and sperm were collected for evaluation. The testes were histologically evaluated for altered germ cell apoptosis, sperm production, and altered spermiation. RNA and DNA isolated from sperm were assessed for elicited changes in global mRNA transcript abundance and altered DNA methylation. Effects of BPA were observed in changes in body, testis and epididymis weights only at the highest administered dose of BPA of 250,000 μg/kg/d. Genome-wide transcriptomic and epigenomic analyses failed to detect robust alterations in sperm mRNA and DNA methylation levels. These data indicate that prolonged exposure starting in utero to BPA over a wide range of levels has little, if any, impact on the testes and sperm molecular profiles of 90 day old rats as assessed by the histopathologic, morphometric, and molecular endpoints evaluated.
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Affiliation(s)
- Edward Dere
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States; Division of Urology, Rhode Island Hospital, Providence, RI, United States
| | - Linnea M Anderson
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Susan M Huse
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Daniel J Spade
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | | | - Samantha J Madnick
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Susan J Hall
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Luísa Camacho
- Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR, United States
| | - Sherry M Lewis
- Office of Scientific Coordination, National Center for Toxicological Research, Jefferson, AR, United States
| | - Michelle M Vanlandingham
- Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR, United States
| | - Kim Boekelheide
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States.
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19
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Terron A, Bennekou SH. Towards a regulatory use of alternative developmental neurotoxicity testing (DNT). Toxicol Appl Pharmacol 2018; 354:19-23. [PMID: 29454059 DOI: 10.1016/j.taap.2018.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 01/24/2018] [Accepted: 02/02/2018] [Indexed: 02/08/2023]
Abstract
There is a need for a more effective Developmental Neurotoxicity (DNT) screening which is scientifically driven by the fact that the developing nervous system might be more sensitive to exposures to some hazardous chemical. Additional concern comes from the recent societal concerns that toxic chemicals can contribute to the prevalence of neurodevelopment disabilities. Consequently, hazard identification and actions to reduce exposure to these chemicals is a priority in chemical risk assessment. To reach this goal a cost-efficient testing strategy based on a reliable in-vitro testing battery should be developed. Although this goal is representing a huge challenge in risk assessment, available data and methodologies are supporting the ultimate aim of developing a predictive model able to respond to different regulatory based problem formulations.
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20
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Mie A, Andersen HR, Gunnarsson S, Kahl J, Kesse-Guyot E, Rembiałkowska E, Quaglio G, Grandjean P. Human health implications of organic food and organic agriculture: a comprehensive review. Environ Health 2017; 16:111. [PMID: 29073935 PMCID: PMC5658984 DOI: 10.1186/s12940-017-0315-4] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 10/02/2017] [Indexed: 05/08/2023]
Abstract
This review summarises existing evidence on the impact of organic food on human health. It compares organic vs. conventional food production with respect to parameters important to human health and discusses the potential impact of organic management practices with an emphasis on EU conditions. Organic food consumption may reduce the risk of allergic disease and of overweight and obesity, but the evidence is not conclusive due to likely residual confounding, as consumers of organic food tend to have healthier lifestyles overall. However, animal experiments suggest that identically composed feed from organic or conventional production impacts in different ways on growth and development. In organic agriculture, the use of pesticides is restricted, while residues in conventional fruits and vegetables constitute the main source of human pesticide exposures. Epidemiological studies have reported adverse effects of certain pesticides on children's cognitive development at current levels of exposure, but these data have so far not been applied in formal risk assessments of individual pesticides. Differences in the composition between organic and conventional crops are limited, such as a modestly higher content of phenolic compounds in organic fruit and vegetables, and likely also a lower content of cadmium in organic cereal crops. Organic dairy products, and perhaps also meats, have a higher content of omega-3 fatty acids compared to conventional products. However, these differences are likely of marginal nutritional significance. Of greater concern is the prevalent use of antibiotics in conventional animal production as a key driver of antibiotic resistance in society; antibiotic use is less intensive in organic production. Overall, this review emphasises several documented and likely human health benefits associated with organic food production, and application of such production methods is likely to be beneficial within conventional agriculture, e.g., in integrated pest management.
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Affiliation(s)
- Axel Mie
- Karolinska Institutet, Department of Clinical Science and Education, Södersjukhuset, 11883 Stockholm, Sweden
- Swedish University of Agricultural Sciences (SLU), Centre for Organic Food and Farming (EPOK), Ultuna, Sweden
| | - Helle Raun Andersen
- University of Southern Denmark, Department of Public Health, Odense, Denmark
| | - Stefan Gunnarsson
- Swedish University of Agricultural Sciences (SLU), Department of Animal Environment and Health, Skara, Sweden
| | - Johannes Kahl
- University of Copenhagen, Department of Nutrition, Exercise and Sports, Frederiksberg, Denmark
| | - Emmanuelle Kesse-Guyot
- Research Unit on Nutritional Epidemiology (U1153 Inserm, U1125 INRA, CNAM, Université Paris 13), Centre of Research in Epidemiology and Statistics Sorbonne Paris Cité, Bobigny, France
| | - Ewa Rembiałkowska
- Warsaw University of Life Sciences, Department of Functional & Organic Food & Commodities, Warsaw, Poland
| | - Gianluca Quaglio
- Scientific Foresight Unit (Science and Technology Options Assessment [STOA]), Directorate-General for Parliamentary Research Services (EPRS), European Parliament, Brussels, Belgium
| | - Philippe Grandjean
- University of Southern Denmark, Department of Public Health, Odense, Denmark
- Harvard T.H. Chan School of Public Health, Department of Environmental Health, Boston, USA
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21
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Xiong J, An T, Li G, Peng P. Accelerated biodegradation of BPA in water-sediment microcosms with Bacillus sp. GZB and the associated bacterial community structure. CHEMOSPHERE 2017; 184:120-126. [PMID: 28586652 DOI: 10.1016/j.chemosphere.2017.05.163] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 05/09/2017] [Accepted: 05/29/2017] [Indexed: 06/07/2023]
Abstract
Bisphenol A (BPA) is a synthetic chemical primarily used to produce polycarbonate plastics and epoxy resins. Significant industrial and consumer's consumption of BPA-containing products has contributed to extensive contamination in different environmental matrices. In this study, microcosms bioaugmented with Bacillus sp. GZB were constructed to investigate BPA biodegradation, identify the main bacterial community, and evaluate bacterial community responses in the microcosms. Under aerobic conditions, BPA was quickly depleted as a result of bioaugmentation with Bacillus sp. GZB in water-sediment contaminated with pollutants. The pollutants used were generally associated with the electronic wastes (mobile phones, computers, televisions) dismantling process. Adding BPA affected the bacterial community composition in the water-sediment. Furthermore, BPA biodegradation was enhanced by adding electron donors/co-substrates: humic acid, NaCl, glucose, and yeast extract. Metagenomic analysis of the total 16S rRNA genes from the BPA-degrading microcosms with bioaugmentation illustrated that the genera Bacillus, Thiobacillus, Phenylobacterium, and Cloacibacterium were dominant after a 7-week incubation period. A consortium of microorganisms from different bacterial genera may be involved in BPA biodegradation in electronic waste contaminated water-sediment. This study provides new insights about BPA bioaugmentation and bacterial ecology in the BPA-degrading environment.
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Affiliation(s)
- Jukun Xiong
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Taicheng An
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Guiying Li
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Ping'an Peng
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
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22
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Igarashi K, Ideta-Otsuka M, Narita M. The Current State and Future Development of Epigenetic Toxicology. YAKUGAKU ZASSHI 2017; 137:265-271. [PMID: 28250319 DOI: 10.1248/yakushi.16-00230-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Epigenetics has drawn much attention as a mechanism of transcriptional regulation involving modifications to genomic DNA and histone, without changes to nucleotide sequences. Epigenetics is related to various biological phenomena. We defined one of these phenomena as "epigenetic toxicity", in which chemicals affect epigenetic regulation and result in undesirable effects on living organisms. We then detailed the importance of epigenetics and the need for intensive research. Epigenetics is a mechanism that might explain the long-lasting effects of chemicals in an organism, and the formation of a predisposition to various diseases. Recent significant technological advancement in the study of epigenetics could break through the barrier of the mysterious black box of epigenetic toxicity. However, at present it is difficult to say whether the epigenetic point of view is being fully utilized in the evaluation of chemical safety. In this review, we will first summarize the epigenetic toxicity research field, with examples of epigenetic toxicities and technologies for epigenetic analysis. Following that, we will point out some challenges in which an epigenetic viewpoint may be essential for the evaluation of chemical safety, and we will show some current approaches. We hope this review will trigger a discussion about epigenetic toxicity that will lead to encouraging research advancements.
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Affiliation(s)
- Katsuhide Igarashi
- Life Science Tokyo Advanced Research Center (L-StaR), Hoshi University School of Pharmacy and Pharmaceutical Sciences
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23
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Tweedale AC. The inadequacies of pre-market chemical risk assessment's toxicity studies-the implications. J Appl Toxicol 2016; 37:92-104. [PMID: 27785833 DOI: 10.1002/jat.3396] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 08/22/2016] [Accepted: 09/05/2016] [Indexed: 11/06/2022]
Abstract
Industry provides essentially all the data for most (pre-market) chemical risk assessments (RA); academics study a chemical once it is marketed. For two randomly-chosen high production chemicals, despite new European Union mandates to evaluate all data, just 13% of the herbicide bentazon and 15% of the flame-retardant hexabromocyclododecane's published toxicity studies were found in their pre-market RA, and a systematic review on bentazon concludes it has greater hazards than indicated in its RA. More important, for both, academia's toxicity studies were designated as lower quality than industries were, despite showing hazards at lower doses. The accuracy of industry's test methods is analyzed and found to be replicable but insensitive, thus inaccurate. The synthetic pharmaceutical industry originated them, and by 1983 the Organization for Economic Cooperation & Development mandated their test guidelines (TG) methods be accepted for any new study for pre-market RA. For existing studies, industry's "Klimisch" criterion is universally used to evaluate quality, but it only states that TG studies produce the best data. However, no TG can answer the realistic exposure effect hypotheses of academics; therefore, crucially in pre-market RA, tens of thousands of published experimental findings (increasingly at low dose) are ignored to determine the safe dose. Few appreciate this, so scientific debate on the most accurate elements of toxicity tests is urgently indicated. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Anthony C Tweedale
- R.I.S.K. Consultancy (Rebutting Industry Science with Knowledge), Brussels, Belgium
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24
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Luo S, Li Y, Li Y, Zhu Q, Jiang J, Wu C, Shen T. Gestational and lactational exposure to low-dose bisphenol A increases Th17 cells in mice offspring. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 47:149-158. [PMID: 27693988 DOI: 10.1016/j.etap.2016.09.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 09/22/2016] [Accepted: 09/24/2016] [Indexed: 06/06/2023]
Abstract
Increasing evidence demonstrates that perinatal exposure to Bisphenol A (BPA) can cause immune disorders throughout the life span. However, the biological basis for these immune disorders is poorly understood and the effects of exposure to BPA on Th17 development are unknown. The present study sought to characterize alterations of Th17 cells in childhood and adulthood following gestational and lactational exposure to environmentally relevant low-dose of BPA and the underlying mechanisms. Pregnant dams were exposed to BPA (10, 100 or 1000nM) via drinking water from gestational day (GD) 0 to postnatal day (PND) 21. At PNDs 21 and 42, offspring mice were anesthetized, blood was obtained for cytokine assay and spleens were collected for Th17 cell frequency and RORγt mRNA expression analysis. Perinatal exposure to low-dose BPA resulted in a dose-dependent and gender-specific persistent rise in Th17 cells accompanied by an increase of RORγt mRNA expression in the offsprings. The contents of major Th17 cell-derived cytokines (IL-17 and IL-21) and those essential for Th17 cell differentiation (IL-6 and IL-23) were also increased compared to those in controls. These changes were more pronounced in female than in male offsprings. However, perinatal exposure to low-dose BPA had little effect on serum TGF-β, another key regulator for Th17 cell development. Our results suggest that gestational and lactational exposure to a low-dose of BPA can affect Th17 cell development via an action on its transcription factor and the regulatory cytokines. These findings provide novel insight into sustained immune disorders by BPA exposure during development.
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Affiliation(s)
- Shimeng Luo
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Yun Li
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Yingpei Li
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Qixing Zhu
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China; Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China; Institute of Dermatology, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Jianhua Jiang
- Department of Clinical Nutriology, The First Affiliated Hospital, Anhui Medical University, Hefei 230022, Anhui, PR China
| | - Changhao Wu
- Department of Biochemistry and Physiology, Faculty of Heath & Medical Sciences, University of Surrey, Surrey, Guildford, UK
| | - Tong Shen
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China; Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China; Institute of Dermatology, Anhui Medical University, Hefei 230032, Anhui, PR China.
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25
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Molander L, Hanberg A, Rudén C, Ågerstrand M, Beronius A. Combining web-based tools for transparent evaluation of data for risk assessment: developmental effects of bisphenol A on the mammary gland as a case study. J Appl Toxicol 2016; 37:319-330. [DOI: 10.1002/jat.3363] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/14/2016] [Accepted: 06/14/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Linda Molander
- Department of Environmental Science and Analytical Chemistry; Stockholm University; 106 91 Stockholm Sweden
| | - Annika Hanberg
- Institute of Environmental Medicine, Karolinska Institute; PO Box 210 171 77 Stockholm Sweden
| | - Christina Rudén
- Department of Environmental Science and Analytical Chemistry; Stockholm University; 106 91 Stockholm Sweden
| | - Marlene Ågerstrand
- Department of Environmental Science and Analytical Chemistry; Stockholm University; 106 91 Stockholm Sweden
| | - Anna Beronius
- Department of Environmental Science and Analytical Chemistry; Stockholm University; 106 91 Stockholm Sweden
- Institute of Environmental Medicine, Karolinska Institute; PO Box 210 171 77 Stockholm Sweden
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Hicks KD, Sullivan AW, Cao J, Sluzas E, Rebuli M, Patisaul HB. Interaction of bisphenol A (BPA) and soy phytoestrogens on sexually dimorphic sociosexual behaviors in male and female rats. Horm Behav 2016; 84:121-6. [PMID: 27373758 PMCID: PMC4996731 DOI: 10.1016/j.yhbeh.2016.06.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 06/14/2016] [Accepted: 06/28/2016] [Indexed: 01/08/2023]
Abstract
Concerns have been raised regarding the potential for endocrine disrupting compounds (EDCs) to alter brain development and behavior. Developmental exposure to bisphenol A (BPA), a ubiquitous EDC, has been linked to altered sociosexual and mood-related behaviors in various animal models and children but effects are inconsistent across laboratories and animal models creating confusion about potential risk in humans. Exposure to endocrine active diets, such as soy, which is rich in phytoestrogens, may contribute to this variability. Here, we tested the individual and combined effects of low dose oral BPA and soy diet or the individual isoflavone genistein (GEN; administered as the aglycone genistin (GIN)) on rat sociosexual behaviors with the hypothesis that soy would obfuscate any BPA-related effects. Social and activity levels were unchanged by developmental exposure to BPA but soy diet had sex specific effects including suppressed novelty preference, and open field exploration in females. The data presented here reinforce that environmental factors, including anthropogenic chemical exposure and hormone active diets, can shape complex behaviors and even reverse expected sex differences.
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Affiliation(s)
- Kimani D Hicks
- Department of Psychology, North Carolina State University, Raleigh, NC 27695, USA
| | - Alana W Sullivan
- Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA; W. M. Keck Center for Behavioral Biology, Raleigh, NC 27695, USA
| | - Jinyan Cao
- Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Emily Sluzas
- Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Meghan Rebuli
- Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Heather B Patisaul
- Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA; W. M. Keck Center for Behavioral Biology, Raleigh, NC 27695, USA.
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Vandenberg LN, Ågerstrand M, Beronius A, Beausoleil C, Bergman Å, Bero LA, Bornehag CG, Boyer CS, Cooper GS, Cotgreave I, Gee D, Grandjean P, Guyton KZ, Hass U, Heindel JJ, Jobling S, Kidd KA, Kortenkamp A, Macleod MR, Martin OV, Norinder U, Scheringer M, Thayer KA, Toppari J, Whaley P, Woodruff TJ, Rudén C. A proposed framework for the systematic review and integrated assessment (SYRINA) of endocrine disrupting chemicals. Environ Health 2016; 15:74. [PMID: 27412149 PMCID: PMC4944316 DOI: 10.1186/s12940-016-0156-6] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 06/17/2016] [Indexed: 05/07/2023]
Abstract
BACKGROUND The issue of endocrine disrupting chemicals (EDCs) is receiving wide attention from both the scientific and regulatory communities. Recent analyses of the EDC literature have been criticized for failing to use transparent and objective approaches to draw conclusions about the strength of evidence linking EDC exposures to adverse health or environmental outcomes. Systematic review methodologies are ideal for addressing this issue as they provide transparent and consistent approaches to study selection and evaluation. Objective methods are needed for integrating the multiple streams of evidence (epidemiology, wildlife, laboratory animal, in vitro, and in silico data) that are relevant in assessing EDCs. METHODS We have developed a framework for the systematic review and integrated assessment (SYRINA) of EDC studies. The framework was designed for use with the International Program on Chemical Safety (IPCS) and World Health Organization (WHO) definition of an EDC, which requires appraisal of evidence regarding 1) association between exposure and an adverse effect, 2) association between exposure and endocrine disrupting activity, and 3) a plausible link between the adverse effect and the endocrine disrupting activity. RESULTS Building from existing methodologies for evaluating and synthesizing evidence, the SYRINA framework includes seven steps: 1) Formulate the problem; 2) Develop the review protocol; 3) Identify relevant evidence; 4) Evaluate evidence from individual studies; 5) Summarize and evaluate each stream of evidence; 6) Integrate evidence across all streams; 7) Draw conclusions, make recommendations, and evaluate uncertainties. The proposed method is tailored to the IPCS/WHO definition of an EDC but offers flexibility for use in the context of other definitions of EDCs. CONCLUSIONS When using the SYRINA framework, the overall objective is to provide the evidence base needed to support decision making, including any action to avoid/minimise potential adverse effects of exposures. This framework allows for the evaluation and synthesis of evidence from multiple evidence streams. Finally, a decision regarding regulatory action is not only dependent on the strength of evidence, but also the consequences of action/inaction, e.g. limited or weak evidence may be sufficient to justify action if consequences are serious or irreversible.
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Affiliation(s)
- Laura N. Vandenberg
- />Department of Environmental Health Sciences, University of Massachusetts Amherst School of Public Health & Health Sciences, Amherst, MA USA
| | - Marlene Ågerstrand
- />Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden
| | - Anna Beronius
- />Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Claire Beausoleil
- />ANSES (French Agency for Food, Environmental and Occupational Health Safety), Maisons Alfort, France
| | - Åke Bergman
- />Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden
- />Swedish Toxicology Sciences Research Center, Södertälje, Sweden
| | - Lisa A. Bero
- />Charles Perkins Centre, The University of Sydney, Sydney, Australia
| | - Carl-Gustaf Bornehag
- />Department of health sciences, Karlstad University, Karlstad, Sweden
- />Icahn School of Medicine at Mount Sinai, New York City, USA
| | - C. Scott Boyer
- />Swedish Toxicology Sciences Research Center, Södertälje, Sweden
| | | | - Ian Cotgreave
- />Swedish Toxicology Sciences Research Center (Swetox), Karolinska Institutet, Södertälje, Sweden
| | - David Gee
- />Institute of Environment, Health and Societies, Brunel University London, Uxbridge, UK
| | - Philippe Grandjean
- />Department of Environmental Medicine, University of Southern Denmark, Odense, Denmark
| | | | - Ulla Hass
- />National Food Institute, Technical University of Denmark, Søborg, Denmark
| | - Jerrold J. Heindel
- />National Institute of Environmental Health Sciences, Division of Extramural Research and Training, Research Triangle Park, NC USA
| | - Susan Jobling
- />Institute of Environment, Health and Societies, Brunel University London, Uxbridge, UK
| | - Karen A. Kidd
- />Biology Department and Canadian Rivers Institute, University of New Brunswick, Saint John, New Brunswick Canada
| | - Andreas Kortenkamp
- />Institute of Environment, Health and Societies, Brunel University London, Uxbridge, UK
| | - Malcolm R. Macleod
- />Centre for Clinical Brain Sciences, University of Edinburgh, Scotland, UK
| | - Olwenn V. Martin
- />Institute of Environment, Health and Societies, Brunel University London, Uxbridge, UK
| | - Ulf Norinder
- />Swedish Toxicology Sciences Research Center, Södertälje, Sweden
| | - Martin Scheringer
- />Institute for Chemical and Bioengineering, ETH Zürich, Zürich, Switzerland
| | - Kristina A. Thayer
- />Department of Health and Human Services, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC USA
| | - Jorma Toppari
- />University of Turku, Turku University Hospital, Turku, Finland
| | - Paul Whaley
- />Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - Tracey J. Woodruff
- />School of Medicine, Program on Reproductive Health and the Environment, University of California, San Francisco, Oakland, CA USA
| | - Christina Rudén
- />Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden
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Yamane J, Aburatani S, Imanishi S, Akanuma H, Nagano R, Kato T, Sone H, Ohsako S, Fujibuchi W. Prediction of developmental chemical toxicity based on gene networks of human embryonic stem cells. Nucleic Acids Res 2016; 44:5515-28. [PMID: 27207879 PMCID: PMC4937330 DOI: 10.1093/nar/gkw450] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 05/09/2016] [Indexed: 01/01/2023] Open
Abstract
Predictive toxicology using stem cells or their derived tissues has gained increasing importance in biomedical and pharmaceutical research. Here, we show that toxicity category prediction by support vector machines (SVMs), which uses qRT-PCR data from 20 categorized chemicals based on a human embryonic stem cell (hESC) system, is improved by the adoption of gene networks, in which network edge weights are added as feature vectors when noisy qRT-PCR data fail to make accurate predictions. The accuracies of our system were 97.5–100% for three toxicity categories: neurotoxins (NTs), genotoxic carcinogens (GCs) and non-genotoxic carcinogens (NGCs). For two uncategorized chemicals, bisphenol-A and permethrin, our system yielded reasonable results: bisphenol-A was categorized as an NGC, and permethrin was categorized as an NT; both predictions were supported by recently published papers. Our study has two important features: (i) as the first study to employ gene networks without using conventional quantitative structure-activity relationships (QSARs) as input data for SVMs to analyze toxicogenomics data in an hESC validation system, it uses additional information of gene-to-gene interactions to significantly increase prediction accuracies for noisy gene expression data; and (ii) using only undifferentiated hESCs, our study has considerable potential to predict late-onset chemical toxicities, including abnormalities that occur during embryonic development.
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Affiliation(s)
- Junko Yamane
- Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
| | - Sachiyo Aburatani
- Computational Biology Research Center, Advanced Industrial Science and Technology (AIST), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Satoshi Imanishi
- Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
| | - Hiromi Akanuma
- Research Center for Environmental Risk, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Reiko Nagano
- Research Center for Environmental Risk, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Tsuyoshi Kato
- Department of Computer Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Hideko Sone
- Research Center for Environmental Risk, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Seiichiroh Ohsako
- Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
| | - Wataru Fujibuchi
- Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan Computational Biology Research Center, Advanced Industrial Science and Technology (AIST), 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
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29
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Yin N, Yao X, Qin Z, Wang YL, Faiola F. Assessment of Bisphenol A (BPA) neurotoxicity in vitro with mouse embryonic stem cells. J Environ Sci (China) 2015; 36:181-187. [PMID: 26456621 DOI: 10.1016/j.jes.2015.06.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 06/18/2015] [Accepted: 06/23/2015] [Indexed: 06/05/2023]
Abstract
The adverse effects of environmental pollution on our well-being have been intensively studied with many in vitro and in vivo systems. In our group, we focus on stem cell toxicology due to the multitude of embryonic stem cell (ESC) properties which can be exerted in toxicity assays. In fact, ESCs can differentiate in culture to mimic embryonic development in vivo, or specifically to virtually any kind of somatic cells. Here, we used the toxicant Bisphenol A (BPA), a chemical known as a hazard to infants and children, and showed that our stem cell toxicology system was able to efficiently recapitulate most of the toxic effects of BPA previously detected by in vitro system or animal tests. More precisely, we demonstrated that BPA affected the proper specification of germ layers during our in vitro mimicking of the embryonic development, as well as the establishment of neural ectoderm and neural progenitor cells.
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Affiliation(s)
- Nuoya Yin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Xinglei Yao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhanfen Qin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yuan-Liang Wang
- Section of Molecular Biology, University of California at San Diego, La Jolla, CA 92093, USA
| | - Francesco Faiola
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Xu X, Gu T, Shen Q. Different effects of bisphenol-A on memory behavior and synaptic modification in intact and estrogen-deprived female mice. J Neurochem 2015; 132:572-82. [DOI: 10.1111/jnc.12998] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/10/2014] [Accepted: 11/13/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaohong Xu
- Chemistry and Life Sciences College; Zhejiang Normal University; Jinhua China
| | - Ting Gu
- Chemistry and Life Sciences College; Zhejiang Normal University; Jinhua China
| | - Qiaoqiao Shen
- Chemistry and Life Sciences College; Zhejiang Normal University; Jinhua China
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31
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Smirnova L, Hogberg HT, Leist M, Hartung T. Developmental neurotoxicity - challenges in the 21st century and in vitro opportunities. ALTEX-ALTERNATIVES TO ANIMAL EXPERIMENTATION 2015; 31:129-56. [PMID: 24687333 DOI: 10.14573/altex.1403271] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Accepted: 03/28/2014] [Indexed: 11/23/2022]
Abstract
In recent years neurodevelopmental problems in children have increased at a rate that suggests lifestyle factors and chemical exposures as likely contributors. When environmental chemicals contribute to neurodevelopmental disorders developmental neurotoxicity (DNT) becomes an enormous concern. But how can it be tackled? Current animal test- based guidelines are prohibitively expensive, at $ 1.4 million per substance, while their predictivity for human health effects may be limited, and mechanistic data that would help species extrapolation are not available. A broader screening for substances of concern requires a reliable testing strategy, applicable to larger numbers of substances, and sufficiently predictive to warrant further testing. This review discusses the evidence for possible contributions of environmental chemicals to DNT, limitations of the current test paradigm, emerging concepts and technologies pertinent to in vitro DNT testing and assay evaluation, as well as the prospect of a paradigm shift based on 21st century technologies.
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Affiliation(s)
- Lena Smirnova
- Centers for Alternatives to Animal Testing (CAAT) at Johns Hopkins Bloomberg School of Public Health, USA
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32
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Bridging the gap between academic research and regulatory health risk assessment of Endocrine Disrupting Chemicals. Curr Opin Pharmacol 2014; 19:99-104. [DOI: 10.1016/j.coph.2014.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 08/28/2014] [Accepted: 08/29/2014] [Indexed: 12/09/2022]
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Lee JH, Park YH, Song HG, Park HP, Kim HS, Kim CS, Kim JT. The effect of lidocaine on apoptotic neurodegeneration in the developing mouse brain. Korean J Anesthesiol 2014; 67:334-41. [PMID: 25473463 PMCID: PMC4252346 DOI: 10.4097/kjae.2014.67.5.334] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 07/31/2014] [Accepted: 08/08/2014] [Indexed: 12/13/2022] Open
Abstract
Background General anesthetics induce neuronal apoptosis in the immature brain. Regional anesthesia using local anesthetics can be an alternative to general anesthesia. Therefore, this study investigated the possible effect of lidocaine on neuronal apoptosis. Methods Fifty-one 7-day-old C57BL6 mice were allocated into control (group C), lidocaine (group L), lidocaine plus midazolam (group LM) and isoflurane (group I) groups. Group C received normal saline administration. Groups L and LM were injected with lidocaine (4 mg/kg, subcutaneously) only and the same dose of lidocaine plus midazolam (9 mg/kg, subcutaneously). Group I was exposed to 0.75 vol% isoflurane for 6 h. After 6 h, apoptotic neurodegeneration was assessed using caspase-3 immunostaining and terminal deoxynucleotidyl transferase dUTP nick-end labelling (TUNEL) staining. Results For the entire brain section, neuronal cells exhibiting caspase-3 activation were observed more frequently in group I than in group C (P < 0.001). In the thalamus, apoptosis of group L was more frequent than that of group C (P < 0.001), but less freqent than that of groups LM and I (P = 0.0075 and P < 0.001, respectively). In the cortex, group I experienced more apoptosis than group L and C (all Ps < 0.001). On TUNEL staining, the difference in apoptosis between the lidocaine and control groups was marginal (P = 0.05). Conclusions Lidocaine induced minimal apoptosis in the developing brain compared with isoflurane and lidocaine plus midazolam. However, we cannot fully exclude the possible adverse effect of subcutaneously administered lidocaine on the developing brain.
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Affiliation(s)
- Ji-Hyun Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
| | - Yong-Hee Park
- Department of Anesthesiology and Pain Medicine, Chung-Ang University Hospital, Seoul, Korea
| | - Hyun-Gul Song
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
| | - Hee-Pyoung Park
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
| | - Hee-Soo Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
| | - Chong-Sung Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
| | - Jin-Tae Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea
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Beronius A. How can academic research studies fill important information gaps in regulatory risk assessment? – The example of developmental neurotoxicity of bisphenol A. Reprod Toxicol 2014. [DOI: 10.1016/j.reprotox.2014.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ferguson SA, Law CD, Kissling GE. Developmental treatment with ethinyl estradiol, but not bisphenol A, causes alterations in sexually dimorphic behaviors in male and female Sprague Dawley rats. Toxicol Sci 2014; 140:374-92. [PMID: 24798382 PMCID: PMC4133561 DOI: 10.1093/toxsci/kfu077] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 04/17/2014] [Indexed: 01/26/2023] Open
Abstract
The developing central nervous system may be particularly sensitive to bisphenol A (BPA)-induced alterations. Here, pregnant Sprague Dawley rats (n = 11-12/group) were gavaged daily with vehicle, 2.5 or 25.0 μg/kg BPA, or 5.0 or 10.0 μg/kg ethinyl estradiol (EE2) on gestational days 6-21. The BPA doses were selected to be below the no-observed-adverse-effect level (NOAEL) of 5 mg/kg/day. On postnatal days 1-21, all offspring/litter were orally treated with the same dose. A naïve control group was not gavaged. Body weight, pubertal age, estrous cyclicity, and adult serum hormone levels were measured. Adolescent play, running wheel activity, flavored solution intake, female sex behavior, and manually elicited lordosis were assessed. No significant differences existed between the vehicle and naïve control groups. Vehicle controls exhibited significant sexual dimorphism for most behaviors, indicating these evaluations were sensitive to sex differences. However, only EE2 treatment caused significant effects. Relative to female controls, EE2-treated females were heavier, exhibited delayed vaginal opening, aberrant estrous cyclicity, increased play behavior, decreased running wheel activity, and increased aggression toward the stimulus male during sexual behavior assessments. Relative to male controls, EE2-treated males were older at testes descent and preputial separation and had lower testosterone levels. These results suggest EE2-induced masculinization/defeminization of females and are consistent with increased volume of the sexually dimorphic nucleus of the preoptic area (SDN-POA) at weaning in female siblings of these subjects (He, Z., Paule, M. G. and Ferguson, S. A. (2012) Low oral doses of bisphenol A increase volume of the sexually dimorphic nucleus of the preoptic area in male, but not female, rats at postnatal day 21. Neurotoxicol. Teratol. 34, 331-337). Although EE2 treatment caused pubertal delays and decreased testosterone levels in males, their behaviors were within the range of control males. Conversely, BPA treatment did not alter any measured endpoint. Similar to our previous reports (Ferguson, S. A., Law, C. D. Jr and Abshire, J. S. (2011) Developmental treatment with bisphenol A or ethinyl estradiol causes few alterations on early preweaning measures. Toxicol. Sci. 124, 149-160; Ferguson, S. A., Law, C. D. and Abshire, J. S. (2012) Developmental treatment with bisphenol A causes few alterations on measures of postweaning activity and learning. Neurotoxicol. Teratol. 34, 598-606), the BPA doses and design used here produced few alterations.
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Affiliation(s)
- Sherry A Ferguson
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, Arkansas 72079
| | - Charles Delbert Law
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, Arkansas 72079
| | - Grace E Kissling
- Biostatistics Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709
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Kim JY, Yi BR, Go RE, Hwang KA, Nam KH, Choi KC. Methoxychlor and triclosan stimulates ovarian cancer growth by regulating cell cycle- and apoptosis-related genes via an estrogen receptor-dependent pathway. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:1264-74. [PMID: 24835555 DOI: 10.1016/j.etap.2014.04.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 03/20/2014] [Accepted: 04/08/2014] [Indexed: 05/15/2023]
Abstract
Methoxychlor and triclosan are emergent or suspected endocrine-disrupting chemicals (EDCs). Methoxychlor [MXC; 1,1,1-trichlor-2,2-bis (4-methoxyphenyl) ethane] is an organochlorine pesticide that has been primarily used since dichlorodiphenyltrichloroethane (DDT) was banned. In addition, triclosan (TCS) is used as a common component of soaps, deodorants, toothpastes, and other hygiene products at concentrations up to 0.3%. In the present study, the potential impact of MXC and TCS on ovarian cancer cell growth and underlying mechanism(s) was examined following their treatments in BG-1 ovarian cancer cells. As results, MXC and TCS induced BG-1 cell growth via regulating cyclin D1, p21 and Bax genes related with cell cycle and apoptosis. A methylthiazolyldiphenyl-tetrazolium bromide (MTT) assay confirmed that the proliferation of BG-1 ovarian cancer cells was stimulated by MXC (10(-6), 10(-7), 10(-8), and 10(-9)M) or TCS (10(-6), 10(-7), 10(-8), and 10(-9)M). Treatment of BG-1 cells with MXC or TCS resulted in the upregulation of cyclin D1 and downregulation of p21 and Bax transcriptions. In addition, the protein level of cyclin D1 was increased by MXC or TCS while p21 and Bax protein levels appeared to be reduced in these cells. Furthermore, MXC- or TCS-induced alterations of these genes were reversed in the presence of ICI 182,780 (10(-7)M), suggesting that the changes in these gene expressions may be regulated by an ER-dependent signaling pathway. In conclusion, the results of our investigation indicate that two potential EDCs, MXC and TCS, may stimulate ovarian cancer growth by regulating cell cycle- and apoptosis-related genes via an ER-dependent pathway.
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Affiliation(s)
- Joo-Young Kim
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Bo-Rim Yi
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Ryeo-Eun Go
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Kyung-A Hwang
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Ki-Hoan Nam
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gun, Chungbuk, Republic of Korea
| | - Kyung-Chul Choi
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea.
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Fujimoto T, Kubo K, Nishikawa Y, Aou S. Brief neonatal handling alters sexually dimorphic behaviors in adult rats. J Integr Neurosci 2014; 13:61-70. [PMID: 24738539 DOI: 10.1142/s0219635214500046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Several effects of neonatal handling on brain and behavior have been reported. We investigated the effects of neonatal handling on behaviors that have been shown to be sexually dimorphic in rats using an open-field test. "Gender differences" were observed in locomotor activity, exploratory behavior and grooming in the handled group. However, clear gender differences in these behaviors were not observed in the non-handled group. Our findings show that brief daily handling sessions (~ 1 min) in the first 2 weeks of postnatal life increased locomotor activity and exploratory behavior, and that these effects were more pronounced in females. Moreover, many rats in the non-handling group exhibited an increase in defecation relative to the handling group during the 10-min observation period. This suggests that the non-handling group experienced more stress in response to the novel open-field arena, and that this resulted in the absence of gender differences. Notably, this anxiety-related response was attenuated by neonatal handling. Our study underscores the impact of brief neonatal handling on sexually dimorphic behaviors, and indicates that caution should be exercised in controlling for the effects of handling between experimental groups, particularly in neurotoxicological studies that evaluate gender differences.
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Affiliation(s)
- Tetsuya Fujimoto
- Department of Physiology, Osaka Dental University, Hirakata 573-1121, Japan
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Delclos KB, Camacho L, Lewis SM, Vanlandingham MM, Latendresse JR, Olson GR, Davis KJ, Patton RE, Gamboa da Costa G, Woodling KA, Bryant MS, Chidambaram M, Trbojevich R, Juliar BE, Felton RP, Thorn BT. Toxicity evaluation of bisphenol A administered by gavage to Sprague Dawley rats from gestation day 6 through postnatal day 90. Toxicol Sci 2014; 139:174-97. [PMID: 24496637 DOI: 10.1093/toxsci/kfu022] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Bisphenol A (BPA) is a high production volume industrial chemical to which there is widespread human oral exposure. Guideline studies used to set regulatory limits detected adverse effects only at doses well above human exposures and established a no-observed-adverse-effect level (NOAEL) of 5 mg/kg body weight (bw)/day. However, many reported animal studies link BPA to potentially adverse effects on multiple organ systems at doses below the NOAEL. The primary goals of the subchronic study reported here were to identify adverse effects induced by orally (gavage) administered BPA below the NOAEL, to characterize the dose response for such effects and to determine doses for a subsequent chronic study. Sprague Dawley rat dams were dosed daily from gestation day 6 until the start of labor, and their pups were directly dosed from day 1 after birth to termination. The primary focus was on seven equally spaced BPA doses (2.5-2700 μg/kg bw/day). Also included were a naïve control, two doses of ethinyl estradiol (EE2) to demonstrate the estrogen responsiveness of the animal model, and two high BPA doses (100,000 and 300,000 μg/kg bw/day) expected from guideline studies to produce adverse effects. Clear adverse effects of BPA, including depressed gestational and postnatal body weight gain, effects on the ovary (increased cystic follicles, depleted corpora lutea, and antral follicles), and serum hormones (increased serum estradiol and prolactin and decreased progesterone), were observed only at the two high doses of BPA. BPA-induced effects partially overlapped those induced by EE2, consistent with the known weak estrogenic activity of BPA.
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Affiliation(s)
- K Barry Delclos
- Division of Biochemical Toxicology, 3900 NCTR Road, Jefferson, Arkansas 72079
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Beronius A, Molander L, Rudén C, Hanberg A. Facilitating the use of non-standard in vivo studies in health risk assessment of chemicals: a proposal to improve evaluation criteria and reporting. J Appl Toxicol 2014; 34:607-17. [PMID: 24481642 DOI: 10.1002/jat.2991] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/19/2013] [Accepted: 12/19/2013] [Indexed: 11/08/2022]
Abstract
To improve data availability in health risk assessment of chemicals and fill information gaps there is a need to facilitate the use of non-standard toxicity studies, i.e. studies not conducted according to any standardized toxicity test guidelines. The purpose of this work was to propose criteria and guidance for the evaluation of reliability and relevance of non-standard in vivo studies, which could be used to facilitate systematic and transparent evaluation of such studies for health risk assessment. Another aim was to propose user friendly guidance for reporting of non-standard studies intended to promote an improvement in reporting of studies that could be of use in risk assessment. Requirements and recommendations for the design and execution of in vivo toxicity studies were identified from The Organisation for Economic Co-operation and Development (OECD) test guidelines, and served as basis for the data evaluation criteria and reporting guidelines. Feedback was also collected from experts within the field of toxicity testing and risk assessment and used to construct a two-tiered framework for study evaluation, as well as refine the reporting guidelines. The proposed framework emphasizes the importance of study relevance and an important aspect is to not completely dismiss studies from health risk assessment based on very strict criteria for reliability. The suggested reporting guidelines provide researchers with a tool to fulfill reporting requirements as stated by regulatory agencies. Together, these resources provide an approach to include all relevant data that may fill information gaps and reduce scientific uncertainty in health risk assessment conclusions, and subsequently also in chemical policy decisions.
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Affiliation(s)
- Anna Beronius
- Institute of Environmental Medicine, Karolinska Institutet, PO Box 210, 171 77, Stockholm, Sweden; Department of Applied Environmental Science, Stockholm University, 106 91, Stockholm, Sweden
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Beronius A. Risk to all or none? The Bisphenol A risk controversy. Toxicol Lett 2013. [DOI: 10.1016/j.toxlet.2013.06.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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