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Sangwan S, Bhattacharyya R, Banerjee D. Plastic compounds and liver diseases: Whether bisphenol A is the only culprit. Liver Int 2024; 44:1093-1105. [PMID: 38407523 DOI: 10.1111/liv.15879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 02/08/2024] [Accepted: 02/12/2024] [Indexed: 02/27/2024]
Abstract
Plastics, while providing modern conveniences, have become an inescapable source of global concern due to their role in environmental pollution. Particularly, the focus on bisphenol A (BPA) reveals its biohazardous nature and association with liver issues, specifically steatosis. However, research indicates that BPA is just one facet of the problem, as other bisphenol analogues, microplastics, nanoplastics and additional plastic derivatives also pose potential risks. Notably, BPA is implicated in every stage of non-alcoholic fatty liver disease (NAFLD) onset and progression, surpassing hepatitis B virus as a primary cause of chronic liver disease worldwide. As plastic contamination tops the environmental contaminants list, urgent action is needed to assess causative factors and mitigate their impact. This review delves into the molecular disruptions linking plastic pollutant exposure to liver diseases, emphasizing the broader connection between plastics and the rising prevalence of NAFLD.
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Affiliation(s)
- Sonal Sangwan
- Department of Experimental Medicine and Biotechnology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Rajasri Bhattacharyya
- Department of Experimental Medicine and Biotechnology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Dibyajyoti Banerjee
- Department of Experimental Medicine and Biotechnology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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2
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Ricker K, Cheng V, Hsieh CJ, Tsai FC, Osborne G, Li K, Yilmazer-Musa M, Sandy MS, Cogliano VJ, Schmitz R, Sun M. Application of the Key Characteristics of Carcinogens to Bisphenol A. Int J Toxicol 2024; 43:253-290. [PMID: 38204208 DOI: 10.1177/10915818231225161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
The ten key characteristics (KCs) of carcinogens are based on characteristics of known human carcinogens and encompass many types of endpoints. We propose that an objective review of the large amount of cancer mechanistic evidence for the chemical bisphenol A (BPA) can be achieved through use of these KCs. A search on metabolic and mechanistic data relevant to the carcinogenicity of BPA was conducted and web-based software tools were used to screen and organize the results. We applied the KCs to systematically identify, organize, and summarize mechanistic information for BPA, and to bring relevant carcinogenic mechanisms into focus. For some KCs with very large data sets, we utilized reviews focused on specific endpoints. Over 3000 studies for BPA from various data streams (exposed humans, animals, in vitro and cell-free systems) were identified. Mechanistic data relevant to each of the ten KCs were identified, with receptor-mediated effects, epigenetic alterations, oxidative stress, and cell proliferation being especially data rich. Reactive and bioactive metabolites are also associated with a number of KCs. This review demonstrates how the KCs can be applied to evaluate mechanistic data, especially for data-rich chemicals. While individual entities may have different approaches for the incorporation of mechanistic data in cancer hazard identification, the KCs provide a practical framework for conducting an objective examination of the available mechanistic data without a priori assumptions on mode of action. This analysis of the mechanistic data available for BPA suggests multiple and inter-connected mechanisms through which this chemical can act.
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Affiliation(s)
- Karin Ricker
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Vanessa Cheng
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Chingyi Jennifer Hsieh
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Sacramento, CA, USA
| | - Feng C Tsai
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Gwendolyn Osborne
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Kate Li
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Meltem Yilmazer-Musa
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Martha S Sandy
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Vincent J Cogliano
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Rose Schmitz
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, CA, USA
| | - Meng Sun
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Sacramento, CA, USA
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3
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Mentsiou Nikolaou E, Kalafati IP, Dedoussis GV. The Interplay between Endocrine-Disrupting Chemicals and the Epigenome towards Metabolic Dysfunction-Associated Steatotic Liver Disease: A Comprehensive Review. Nutrients 2024; 16:1124. [PMID: 38674815 PMCID: PMC11054068 DOI: 10.3390/nu16081124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Metabolic dysfunction-associated steatotic liver disease (MASLD), described as the most prominent cause of chronic liver disease worldwide, has emerged as a significant public health issue, posing a considerable challenge for most countries. Endocrine-disrupting chemicals (EDCs), commonly found in daily use items and foods, are able to interfere with nuclear receptors (NRs) and disturb hormonal signaling and mitochondrial function, leading, among other metabolic disorders, to MASLD. EDCs have also been proposed to cause transgenerationally inherited alterations leading to increased disease susceptibility. In this review, we are focusing on the most prominent linking pathways between EDCs and MASLD, their role in the induction of epigenetic transgenerational inheritance of the disease as well as up-to-date practices aimed at reducing their impact.
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Affiliation(s)
- Evangelia Mentsiou Nikolaou
- Department of Nutrition and Dietetics, School of Health and Education, Harokopio University of Athens, 17676 Athens, Greece; (E.M.N.); (G.V.D.)
| | - Ioanna Panagiota Kalafati
- Department of Nutrition and Dietetics, School of Health and Education, Harokopio University of Athens, 17676 Athens, Greece; (E.M.N.); (G.V.D.)
- Department of Nutrition and Dietetics, School of Physical Education, Sport Science and Dietetics, University of Thessaly, 42132 Trikala, Greece
| | - George V. Dedoussis
- Department of Nutrition and Dietetics, School of Health and Education, Harokopio University of Athens, 17676 Athens, Greece; (E.M.N.); (G.V.D.)
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Besaratinia A. The State of Research and Weight of Evidence on the Epigenetic Effects of Bisphenol A. Int J Mol Sci 2023; 24:ijms24097951. [PMID: 37175656 PMCID: PMC10178030 DOI: 10.3390/ijms24097951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
Bisphenol A (BPA) is a high-production-volume chemical with numerous industrial and consumer applications. BPA is extensively used in the manufacture of polycarbonate plastics and epoxy resins. The widespread utilities of BPA include its use as internal coating for food and beverage cans, bottles, and food-packaging materials, and as a building block for countless goods of common use. BPA can be released into the environment and enter the human body at any stage during its production, or in the process of manufacture, use, or disposal of materials made from this chemical. While the general population is predominantly exposed to BPA through contaminated food and drinking water, non-dietary exposures through the respiratory system, integumentary system, and vertical transmission, as well as other routes of exposure, also exist. BPA is often classified as an endocrine-disrupting chemical as it can act as a xenoestrogen. Exposure to BPA has been associated with developmental, reproductive, cardiovascular, neurological, metabolic, or immune effects, as well as oncogenic effects. BPA can disrupt the synthesis or clearance of hormones by binding and interfering with biological receptors. BPA can also interact with key transcription factors to modulate regulation of gene expression. Over the past 17 years, an epigenetic mechanism of action for BPA has emerged. This article summarizes the current state of research on the epigenetic effects of BPA by analyzing the findings from various studies in model systems and human populations. It evaluates the weight of evidence on the ability of BPA to alter the epigenome, while also discussing the direction of future research.
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Affiliation(s)
- Ahmad Besaratinia
- Department of Population and Public Health Sciences, USC Keck School of Medicine, University of Southern California, M/C 9603, Los Angeles, CA 90033, USA
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5
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Rodríguez-Carrillo A, Mustieles V, Salamanca-Fernández E, Olivas-Martínez A, Suárez B, Bajard L, Baken K, Blaha L, Bonefeld-Jørgensen EC, Couderq S, D'Cruz SC, Fini JB, Govarts E, Gundacker C, Hernández AF, Lacasaña M, Laguzzi F, Linderman B, Long M, Louro H, Neophytou C, Oberemn A, Remy S, Rosenmai AK, Saber AT, Schoeters G, Silva MJ, Smagulova F, Uhl M, Vinggaard AM, Vogel U, Wielsøe M, Olea N, Fernández MF. Implementation of effect biomarkers in human biomonitoring studies: A systematic approach synergizing toxicological and epidemiological knowledge. Int J Hyg Environ Health 2023; 249:114140. [PMID: 36841007 DOI: 10.1016/j.ijheh.2023.114140] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 02/08/2023] [Accepted: 02/15/2023] [Indexed: 02/26/2023]
Abstract
Human biomonitoring (HBM) studies have highlighted widespread daily exposure to environmental chemicals. Some of these are suspected to contribute to adverse health outcomes such as reproductive, neurological, and metabolic disorders, among other developmental and chronic impairments. One of the objectives of the H2020 European Human Biomonitoring Initiative (HBM4EU) was the development of informative effect biomarkers for application in a more systematic and harmonized way in large-scale European HBM studies. The inclusion of effect biomarkers would complement exposure data with mechanistically-based information on early and late adverse effects. For this purpose, a stepwise strategy was developed to identify and implement a panel of validated effect biomarkers in European HBM studies. This work offers an overview of the complete procedure followed, from comprehensive literature search strategies, selection of criteria for effect biomarkers and their classification and prioritization, based on toxicological data and adverse outcomes, to pilot studies for their analytical, physiological, and epidemiological validation. We present the example of one study that demonstrated the mediating role of the effect biomarker status of brain-derived neurotrophic factor BDNF in the longitudinal association between infant bisphenol A (BPA) exposure and behavioral function in adolescence. A panel of effect biomarkers has been implemented in the HBM4EU Aligned Studies as main outcomes, including traditional oxidative stress, reproductive, and thyroid hormone biomarkers. Novel biomarkers of effect, such as DNA methylation status of BDNF and kisspeptin (KISS) genes were also evaluated as molecular markers of neurological and reproductive health, respectively. A panel of effect biomarkers has also been applied in HBM4EU occupational studies, such as micronucleus analysis in lymphocytes and reticulocytes, whole blood comet assay, and malondialdehyde, 8-oxo-2'-deoxyguanosine and untargeted metabolomic profile in urine, to investigate, for example, biological changes in response to hexavalent chromium Cr(VI) exposure. The use of effect biomarkers in HBM4EU has demonstrated their ability to detect early biological effects of chemical exposure and to identify subgroups that are at higher risk. The roadmap developed in HBM4EU confirms the utility of effect biomarkers, and support one of the main objectives of HBM research, which is to link exposure biomarkers to mechanistically validated effect and susceptibility biomarkers in order to better understand the public health implications of human exposure to environmental chemicals.
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Affiliation(s)
- Andrea Rodríguez-Carrillo
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain; Department of Radiology and Physical Medicine, School of Medicine, University of Granada, 18016, Granada, Spain
| | - Vicente Mustieles
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain; Department of Radiology and Physical Medicine, School of Medicine, University of Granada, 18016, Granada, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain
| | - Elena Salamanca-Fernández
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain; Department of Radiology and Physical Medicine, School of Medicine, University of Granada, 18016, Granada, Spain.
| | - Alicia Olivas-Martínez
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain
| | - Beatriz Suárez
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain
| | - Lola Bajard
- RECETOX, Faculty of Science, Masaryk University, Kamenice 5, CZ62500, Brno, Czech Republic
| | - Kirsten Baken
- VITO Health, Flemish Institute for Technological Research (VITO), Mol, Belgium
| | - Ludek Blaha
- RECETOX, Faculty of Science, Masaryk University, Kamenice 5, CZ62500, Brno, Czech Republic
| | - Eva Cecilie Bonefeld-Jørgensen
- Centre for Arctic Health & Molecular Epidemiology, Department of Public Health Aarhus University, Denmark; Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
| | - Stephan Couderq
- Physiologie Moléculaire et Adaptation, Département "Adaptation du Vivant", UMR 7221 MNHN/CNRS, Muséum National d'Histoire Naturelle, Paris, 75005, France
| | - Shereen Cynthia D'Cruz
- Univ Rennes, EHESP, Inserm, Irset (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, F-35000, Rennes, France
| | - Jean-Baptiste Fini
- Physiologie Moléculaire et Adaptation, Département "Adaptation du Vivant", UMR 7221 MNHN/CNRS, Muséum National d'Histoire Naturelle, Paris, 75005, France
| | - Eva Govarts
- VITO Health, Flemish Institute for Technological Research (VITO), Mol, Belgium
| | - Claudia Gundacker
- Institute of Medical Genetics, Medical University of Vienna, Waehringer Strasse 10, A-1090, Vienna, Austria
| | - Antonio F Hernández
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain; Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Granada, Spain
| | - Marina Lacasaña
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain; Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Granada, Spain
| | - Federica Laguzzi
- Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Birgitte Linderman
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Manhai Long
- Centre for Arctic Health & Molecular Epidemiology, Department of Public Health Aarhus University, Denmark; Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
| | - Henriqueta Louro
- National Institute of Health Doutor Ricardo Jorge (INSA), Human Genetics Department, Toxicogenomics and Human Health (ToxOmics), NOVA Medical School/FCM, Universidade Nova de Lisboa, Av. Padre Cruz, 1649-016, Lisbon, Portugal
| | | | - Axel Oberemn
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Sylvie Remy
- VITO Health, Flemish Institute for Technological Research (VITO), Mol, Belgium
| | | | | | - Greet Schoeters
- VITO Health, Flemish Institute for Technological Research (VITO), Mol, Belgium; Department of Biomedical Sciences and Toxicological Center, University of Antwerp, Belgium
| | - Maria Joao Silva
- National Institute of Health Doutor Ricardo Jorge (INSA), Human Genetics Department, Toxicogenomics and Human Health (ToxOmics), NOVA Medical School/FCM, Universidade Nova de Lisboa, Av. Padre Cruz, 1649-016, Lisbon, Portugal
| | - Fatima Smagulova
- Univ Rennes, EHESP, Inserm, Irset (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, F-35000, Rennes, France
| | - Maria Uhl
- Environment Agency Austria (EAA), Vienna, Austria
| | - Anne Marie Vinggaard
- National Food Institute, Technical University of Denmark, 2800 Kgs, Lyngby, Denmark
| | - Ulla Vogel
- National Food Institute, Technical University of Denmark, 2800 Kgs, Lyngby, Denmark; The National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Maria Wielsøe
- Centre for Arctic Health & Molecular Epidemiology, Department of Public Health Aarhus University, Denmark
| | - Nicolás Olea
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain; Department of Radiology and Physical Medicine, School of Medicine, University of Granada, 18016, Granada, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain
| | - Mariana F Fernández
- Biomedical Research Center (CIBM), University of Granada, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), 18012, Granada, Spain; Department of Radiology and Physical Medicine, School of Medicine, University of Granada, 18016, Granada, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain.
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6
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Lite C, Raja GL, Juliet M, Sridhar VV, Subhashree KD, Kumar P, Chakraborty P, Arockiaraj J. In utero exposure to endocrine-disrupting chemicals, maternal factors and alterations in the epigenetic landscape underlying later-life health effects. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2022; 89:103779. [PMID: 34843942 DOI: 10.1016/j.etap.2021.103779] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
Widespread persistence of endocrine-disrupting chemicals (EDCs) in the environment has mandated the need to study their potential effects on an individual's long-term health after both acute and chronic exposure periods. In this review article a particular focus is given on in utero exposure to EDCs in rodent models which resulted in altered epigenetic programming and transgenerational effects in the offspring causing disrupted reproductive and metabolic phenotypes. The literature to date establishes the impact of transgenerational effects of EDCs potentially associated with epigenetic mediated mechanisms. Therefore, this review aims to provide a comprehensive overview of epigenetic programming and it's regulation in mammals, primarily focusing on the epigenetic plasticity and susceptibility to exogenous hormone active chemicals during the early developmental period. Further, we have also in depth discussed the epigenetic alterations associated with the exposure to selected EDCs such as Bisphenol A (BPA), di-2-ethylhexyl phthalate (DEHP) and vinclozlin upon in utero exposure especially in rodent models.
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Affiliation(s)
- Christy Lite
- Department of Medical Biotechnology and Integrative Physiology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 602105, Tamil Nadu, India.
| | - Glancis Luzeena Raja
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulatur, Chennai 603203, Tamil Nadu, India
| | - Melita Juliet
- Department of Oral and Maxillofacial Surgery, SRM Kattankulathur Dental College and Hospital, SRM Institute of Science and Technology, Kattankulatur, Chennai 603203, Tamil Nadu, India
| | - Vasisht Varsh Sridhar
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulatur, Chennai 603203, Tamil Nadu, India
| | - K Divya Subhashree
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulatur, Chennai 603203, Tamil Nadu, India
| | - Praveen Kumar
- Department of Medical Biotechnology and Integrative Physiology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 602105, Tamil Nadu, India
| | - Paromita Chakraborty
- Environmental Science and Technology Laboratory, Department of Chemical Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.
| | - Jesu Arockiaraj
- Department of Biotechnology, College of Science and Humanities, SRM Institute of Science and Technology, Kattankulatur, Chennai 603203, Tamil Nadu, India.
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7
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Lim JJ, Dutta M, Dempsey JL, Lehmler HJ, MacDonald J, Bammler T, Walker C, Kavanagh TJ, Gu H, Mani S, Cui JY. Neonatal Exposure to BPA, BDE-99, and PCB Produces Persistent Changes in Hepatic Transcriptome Associated With Gut Dysbiosis in Adult Mouse Livers. Toxicol Sci 2021; 184:83-103. [PMID: 34453844 PMCID: PMC8557404 DOI: 10.1093/toxsci/kfab104] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Recent evidence suggests that complex diseases can result from early life exposure to environmental toxicants. Polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs) are persistent organic pollutants (POPs) and remain a continuing risk to human health despite being banned from production. Developmental BPA exposure mediated-adult onset of liver cancer via epigenetic reprogramming mechanisms has been identified. Here, we investigated whether the gut microbiome and liver can be persistently reprogrammed following neonatal exposure to POPs, and the associations between microbial biomarkers and disease-prone changes in the hepatic transcriptome in adulthood, compared with BPA. C57BL/6 male and female mouse pups were orally administered vehicle, BPA, BDE-99 (a breast milk-enriched PBDE congener), or the Fox River PCB mixture (PCBs), once daily for three consecutive days (postnatal days [PND] 2-4). Tissues were collected at PND5 and PND60. Among the three chemicals investigated, early life exposure to BDE-99 produced the most prominent developmental reprogramming of the gut-liver axis, including hepatic inflammatory and cancer-prone signatures. In adulthood, neonatal BDE-99 exposure resulted in a persistent increase in Akkermansia muciniphila throughout the intestine, accompanied by increased hepatic levels of acetate and succinate, the known products of A. muciniphila. In males, this was positively associated with permissive epigenetic marks H3K4me1 and H3K27, which were enriched in loci near liver cancer-related genes that were dysregulated following neonatal exposure to BDE-99. Our findings provide novel insights that early life exposure to POPs can have a life-long impact on disease risk, which may partly be regulated by the gut microbiome.
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Affiliation(s)
- Joe Jongpyo Lim
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA
| | - Moumita Dutta
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA
| | - Joseph L Dempsey
- Division of Gastroenterology, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington, USA,Center for Microbiome Sciences and Therapeutics, School of Medicine, University of Washington, Seattle, Washington, USA
| | - Hans-Joachim Lehmler
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, Iowa, USA
| | - James MacDonald
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA
| | - Theo Bammler
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA
| | - Cheryl Walker
- Center for Precision Environmental Health, Baylor College of Medicine, Houston, Texas 77030, USA,Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030, USA,Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA,Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas 77030, USA,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Terrance J Kavanagh
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA
| | - Haiwei Gu
- Arizona Metabolomics Laboratory, College of Health Solutions, Arizona State University, Pheonix, Arizona 85004, USA
| | - Sridhar Mani
- Department of Medicine, Molecular Pharmacology and Genetics, Albert Einstein College of Medicine, Bronx, New York 10461, USA
| | - Julia Yue Cui
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA,To whom correspondence should be addressed at Department of Environmental and Occupational Health Sciences, University of Washington, 4225 Roosevelt Way NE, Seattle, WA 98105, USA. E-mail:
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8
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Qin T, Zhang X, Guo T, Yang T, Gao Y, Hao W, Xiao X. Epigenetic Alteration Shaped by the Environmental Chemical Bisphenol A. Front Genet 2021; 11:618966. [PMID: 33505438 PMCID: PMC7830874 DOI: 10.3389/fgene.2020.618966] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 12/14/2020] [Indexed: 12/12/2022] Open
Abstract
Bisphenol A (BPA) is extensively used in plastic products and epoxy resins. The epigenetic response to the environmental chemical BPA was involved in multiple dysfunctional categories, such as cancer, the reproductive system, metabolism, pubertal development, peripheral arterial disease, infant and childhood growth, and neurodevelopment outcomes. In this mini-review, we described the recent progress of the epigenetic effects of the environmental chemical BPA, including DNA methylation, histone methylation, and toxic epigenomics. Notably, the histone modification changes under BPA exposure are summarized in this review. DNA methylation accompanied by transcriptional changes in key genes affected by BPA exposure is related to various processes, including neural development, cancer pathways, and generational transmission. In addition, BPA could also affect histone modifications in many species, such as humans, rats, and zebrafish. Finally, we reviewed recent studies of the toxico-epigenomics approach to reveal the epigenetic effect of BPA exposure genome-wide.
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Affiliation(s)
- Tengfei Qin
- Henan Collaborative Innovation Center of Modern Biological Breeding, Henan Institute of Sciences and Technology, Xinxiang, China
| | - Xiaoping Zhang
- School of Medical Science, Chifeng University, Chifeng, China
| | - Ting Guo
- Henan Collaborative Innovation Center of Modern Biological Breeding, Henan Institute of Sciences and Technology, Xinxiang, China
| | - Ting Yang
- Department of Nephrology, Affiliated Hospital of Beihua University, Jilin City, China
| | - Yahui Gao
- Henan Collaborative Innovation Center of Modern Biological Breeding, Henan Institute of Sciences and Technology, Xinxiang, China
| | - Wei Hao
- Henan Collaborative Innovation Center of Modern Biological Breeding, Henan Institute of Sciences and Technology, Xinxiang, China.,School of Life Sciences, The Chinese University of Hong Kong, Shatin, China
| | - XiangFen Xiao
- Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
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9
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Mustieles V, D'Cruz SC, Couderq S, Rodríguez-Carrillo A, Fini JB, Hofer T, Steffensen IL, Dirven H, Barouki R, Olea N, Fernández MF, David A. Bisphenol A and its analogues: A comprehensive review to identify and prioritize effect biomarkers for human biomonitoring. ENVIRONMENT INTERNATIONAL 2020; 144:105811. [PMID: 32866736 DOI: 10.1016/j.envint.2020.105811] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/24/2020] [Accepted: 05/07/2020] [Indexed: 05/21/2023]
Abstract
Human biomonitoring (HBM) studies have demonstrated widespread and daily exposure to bisphenol A (BPA). Moreover, BPA structural analogues (e.g. BPS, BPF, BPAF), used as BPA replacements, are being increasingly detected in human biological matrices. BPA and some of its analogues are classified as endocrine disruptors suspected of contributing to adverse health outcomes such as altered reproduction and neurodevelopment, obesity, and metabolic disorders among other developmental and chronic impairments. One of the aims of the H2020 European Human Biomonitoring Initiative (HBM4EU) is the implementation of effect biomarkers at large scales in future HBM studies in a systematic and standardized way, in order to complement exposure data with mechanistically-based biomarkers of early adverse effects. This review aimed to identify and prioritize existing biomarkers of effect for BPA, as well as to provide relevant mechanistic and adverse outcome pathway (AOP) information in order to cover knowledge gaps and better interpret effect biomarker data. A comprehensive literature search was performed in PubMed to identify all the epidemiologic studies published in the last 10 years addressing the potential relationship between bisphenols exposure and alterations in biological parameters. A total of 5716 references were screened, out of which, 119 full-text articles were analyzed and tabulated in detail. This work provides first an overview of all epigenetics, gene transcription, oxidative stress, reproductive, glucocorticoid and thyroid hormones, metabolic and allergy/immune biomarkers previously studied. Then, promising effect biomarkers related to altered neurodevelopmental and reproductive outcomes including brain-derived neurotrophic factor (BDNF), kisspeptin (KiSS), and gene expression of nuclear receptors are prioritized, providing mechanistic insights based on in vitro, animal studies and AOP information. Finally, the potential of omics technologies for biomarker discovery and its implications for risk assessment are discussed. To the best of our knowledge, this is the first effort to comprehensively identify bisphenol-related biomarkers of effect for HBM purposes.
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Affiliation(s)
- Vicente Mustieles
- University of Granada, Center for Biomedical Research (CIBM), Spain; Instituto de Investigación Biosanitaria (ibs. GRANADA), Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain.
| | - Shereen Cynthia D'Cruz
- Univ Rennes, EHESP, Inserm, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Stephan Couderq
- Evolution des Régulations Endocriniennes, Département "Adaptation du Vivant", UMR 7221 MNHN/CNRS, Sorbonne Université, Paris 75006, France
| | | | - Jean-Baptiste Fini
- Evolution des Régulations Endocriniennes, Département "Adaptation du Vivant", UMR 7221 MNHN/CNRS, Sorbonne Université, Paris 75006, France
| | - Tim Hofer
- Section of Toxicology and Risk Assessment, Norwegian Institute of Public Health, P.O. Box 222 Skøyen, NO-0213 Oslo, Norway
| | - Inger-Lise Steffensen
- Section of Toxicology and Risk Assessment, Norwegian Institute of Public Health, P.O. Box 222 Skøyen, NO-0213 Oslo, Norway
| | - Hubert Dirven
- Section of Toxicology and Risk Assessment, Norwegian Institute of Public Health, P.O. Box 222 Skøyen, NO-0213 Oslo, Norway
| | - Robert Barouki
- University Paris Descartes, ComUE Sorbonne Paris Cité, Paris, France. Institut national de la santé et de la recherche médicale (INSERM, National Institute of Health & Medical Research) UMR S-1124, Paris, France
| | - Nicolás Olea
- University of Granada, Center for Biomedical Research (CIBM), Spain; Instituto de Investigación Biosanitaria (ibs. GRANADA), Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain
| | - Mariana F Fernández
- University of Granada, Center for Biomedical Research (CIBM), Spain; Instituto de Investigación Biosanitaria (ibs. GRANADA), Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Spain.
| | - Arthur David
- Univ Rennes, EHESP, Inserm, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France.
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10
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Thakur IS, Roy D. Environmental DNA and RNA as Records of Human Exposome, Including Biotic/Abiotic Exposures and Its Implications in the Assessment of the Role of Environment in Chronic Diseases. Int J Mol Sci 2020; 21:ijms21144879. [PMID: 32664313 PMCID: PMC7402316 DOI: 10.3390/ijms21144879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/05/2020] [Accepted: 07/08/2020] [Indexed: 12/21/2022] Open
Abstract
Most of environment-related diseases often result from multiple exposures of abiotic and/or biotic stressors across various life stages. The application of environmental DNA/RNA (eDNA/eRNA) to advance ecological understanding has been very successfully used. However, the eminent extension of eDNA/eRNA-based approaches to estimate human exposure to biotic and/or abiotic environmental stressors to understand the environmental causes of chronic diseases has yet to start. Here, we introduce the potential of eDNA/eRNA for bio-monitoring of human exposome and health effects in the real environmental or occupational settings. This review is the first of its kind to discuss how eDNA/eRNA-based approaches can be applied for assessing the human exposome. eDNA-based exposome assessment is expected to rely on our ability to capture the genome- and epigenome-wide signatures left behind by individuals in the indoor and outdoor physical spaces through shedding, excreting, etc. Records of eDNA/eRNA exposome may reflect the early appearance, persistence, and presence of biotic and/or abiotic-exposure-mediated modifications in these nucleic acid molecules. Functional genome- and epigenome-wide mapping of eDNA offer great promise to help elucidate the human exposome. Assessment of longitudinal exposure to physical, biological, and chemical agents present in the environment through eDNA/eRNA may enable the building of an integrative causal dynamic stochastic model to estimate environmental causes of human health deficits. This model is expected to incorporate key biological pathways and gene networks linking individuals, their geographic locations, and random multi-hits of environmental factors. Development and validation of monitoring of eDNA/eRNA exposome should seriously be considered to introduce into safety and risk assessment and as surrogates of chronic exposure to environmental stressors. Here we highlight that eDNA/eRNA reflecting longitudinal exposure of both biotic and abiotic environmental stressors may serve as records of human exposome and discuss its application as molecular tools for understanding the toxicogenomics basis of environment-related health deficits.
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Affiliation(s)
- Indu Shekhar Thakur
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
- Correspondence: (I.S.T.); (D.R.); Tel.: +91-2670-4321 (I.S.T.); +1-30-5348-1694 (D.R.)
| | - Deodutta Roy
- Department of Environmental Health Sciences, Florida International University, Miami, FL 33199, USA
- Correspondence: (I.S.T.); (D.R.); Tel.: +91-2670-4321 (I.S.T.); +1-30-5348-1694 (D.R.)
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11
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Hollander JA, Cory-Slechta DA, Jacka FN, Szabo ST, Guilarte TR, Bilbo SD, Mattingly CJ, Moy SS, Haroon E, Hornig M, Levin ED, Pletnikov MV, Zehr JL, McAllister KA, Dzierlenga AL, Garton AE, Lawler CP, Ladd-Acosta C. Beyond the looking glass: recent advances in understanding the impact of environmental exposures on neuropsychiatric disease. Neuropsychopharmacology 2020; 45:1086-1096. [PMID: 32109936 PMCID: PMC7234981 DOI: 10.1038/s41386-020-0648-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/17/2020] [Indexed: 12/22/2022]
Abstract
The etiologic pathways leading to neuropsychiatric diseases remain poorly defined. As genomic technologies have advanced over the past several decades, considerable progress has been made linking neuropsychiatric disorders to genetic underpinnings. Interest and consideration of nongenetic risk factors (e.g., lead exposure and schizophrenia) have, in contrast, lagged behind heritable frameworks of explanation. Thus, the association of neuropsychiatric illness to environmental chemical exposure, and their potential interactions with genetic susceptibility, are largely unexplored. In this review, we describe emerging approaches for considering the impact of chemical risk factors acting alone and in concert with genetic risk, and point to the potential role of epigenetics in mediating exposure effects on transcription of genes implicated in mental disorders. We highlight recent examples of research in nongenetic risk factors in psychiatric disorders that point to potential shared biological mechanisms-synaptic dysfunction, immune alterations, and gut-brain interactions. We outline new tools and resources that can be harnessed for the study of environmental factors in psychiatric disorders. These tools, combined with emerging experimental evidence, suggest that there is a need to broadly incorporate environmental exposures in psychiatric research, with the ultimate goal of identifying modifiable risk factors and informing new treatment strategies for neuropsychiatric disease.
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Affiliation(s)
- Jonathan A Hollander
- Genes, Environment and Health Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA.
| | - Deborah A Cory-Slechta
- Department of Environmental Medicine, Box EHSC, University of Rochester Medical Center, Rochester, NY, USA
| | - Felice N Jacka
- Food & Mood Centre, IMPACT SRC, School of Medicine, Deakin University, Geelong, VIC, Australia
- iMPACT (the Institute for Mental and Physical Health and Clinical Translation), Food & Mood Centre, Deakin University, Geelong, VIC, Australia
- Centre for Adolescent Health, Murdoch Children's Research Institute, Melbourne, VIC, Australia
- Black Dog Institute, Sydney, NSW, Australia
- James Cook University, Townsville, QLD, Australia
| | - Steven T Szabo
- Duke University Medical Center, Durham, NC, USA
- Durham Veterans Affairs Medical Center, Durham, NC, USA
| | - Tomás R Guilarte
- Department of Environmental Health Sciences Robert Stempel College of Public Health and Social Work, Florida International University, Miami, FL, USA
| | - Staci D Bilbo
- Department of Psychology & Neuroscience, Duke University, Durham, NC, USA
| | - Carolyn J Mattingly
- Department of Biological Sciences, Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, USA
| | - Sheryl S Moy
- Department of Psychiatry and Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Ebrahim Haroon
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - Mady Hornig
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Edward D Levin
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA
| | - Mikhail V Pletnikov
- Departments of Psychiatry, Neuroscience, Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Julia L Zehr
- Developmental Mechanisms and Trajectories of Psychopathology Branch, National Institute of Mental Health, NIH, Rockville, MD, USA
| | - Kimberly A McAllister
- Genes, Environment and Health Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Anika L Dzierlenga
- Genes, Environment and Health Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Amanda E Garton
- Genes, Environment and Health Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Cindy P Lawler
- Genes, Environment and Health Branch, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, USA
| | - Christine Ladd-Acosta
- Department of Epidemiology and Wendy Klag Center for Autism and Developmental Disabilities, Johns Hopkins University, Baltimore, MD, USA
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12
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Chung FFL, Herceg Z. The Promises and Challenges of Toxico-Epigenomics: Environmental Chemicals and Their Impacts on the Epigenome. ENVIRONMENTAL HEALTH PERSPECTIVES 2020; 128:15001. [PMID: 31950866 PMCID: PMC7015548 DOI: 10.1289/ehp6104] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 12/15/2019] [Accepted: 12/16/2019] [Indexed: 05/02/2023]
Abstract
BACKGROUND It has been estimated that a substantial portion of chronic and noncommunicable diseases can be caused or exacerbated by exposure to environmental chemicals. Multiple lines of evidence indicate that early life exposure to environmental chemicals at relatively low concentrations could have lasting effects on individual and population health. Although the potential adverse effects of environmental chemicals are known to the scientific community, regulatory agencies, and the public, little is known about the mechanistic basis by which these chemicals can induce long-term or transgenerational effects. To address this question, epigenetic mechanisms have emerged as the potential link between genetic and environmental factors of health and disease. OBJECTIVES We present an overview of epigenetic regulation and a summary of reported evidence of environmental toxicants as epigenetic disruptors. We also discuss the advantages and challenges of using epigenetic biomarkers as an indicator of toxicant exposure, using measures that can be taken to improve risk assessment, and our perspectives on the future role of epigenetics in toxicology. DISCUSSION Until recently, efforts to apply epigenomic data in toxicology and risk assessment were restricted by an incomplete understanding of epigenomic variability across tissue types and populations. This is poised to change with the development of new tools and concerted efforts by researchers across disciplines that have led to a better understanding of epigenetic mechanisms and comprehensive maps of epigenomic variation. With the foundations now in place, we foresee that unprecedented advancements will take place in the field in the coming years. https://doi.org/10.1289/EHP6104.
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Affiliation(s)
| | - Zdenko Herceg
- Epigenetics Group, International Agency for Research on Cancer (IARC), Lyon, France
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13
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Zhang M, Zhang MF, Chen FY, Cui Q, Yang BZ, Liu Y, Peng H, Wang KJ. The transcriptional regulation of an antimicrobial peptide hepcidin1 in Oryzias melastigma upon EE2 exposure involved in a new pathway with a novel transcriptional regulatory element HepERE. FISH & SHELLFISH IMMUNOLOGY 2018; 82:421-431. [PMID: 30125706 DOI: 10.1016/j.fsi.2018.08.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 08/08/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
17α-ethinylestradiol (EE2) exerts endocrine disrupting effect and immunotoxic effect on marine animals, including modulation of hepcidin expression. The antimicrobial peptide hepcidin displays a crucial role in innate immunity in fish against invading pathogens. It is known that the transcription of hepcidin in mammals is individually regulated by many stimuli, including inflammation, iron overload, anemia or hypoxia, through several distinct molecular pathways. The canonical mechanism for endocrine disrupting effects is mediated by an estrogen receptor (ER) and estrogen responsive element (ERE), whereas the underlying mechanism for immunotoxic effect is still unclear. In this study, a hepcidin from Oryzias melastigma (OM-hep1) was found to be down-regulated upon EE2 exposure and was associated with ERα. Unlike the revealed signaling pathways for hepcidin regulation in mammals, it was revealed by promoter activity analysis that the OM-hep1 transcription was not associated with canonical immune-associated and hormone-associated regulatory elements, known as the nuclear factor κB (NF-κB), signal transducer and activator of transcription 3 (STAT3), ERE and estrogen-related receptor responsive element (ERRE). Further analysis through a series of base mutations revealed a short fragment from -315 to -289 bp on the OM-hep1 promoter with high activity. This fragment was composed of a putative ERE-like element (23 bases) plus an adjacent down-streamed four bases motif GTGT. Replacement of either of the core bases (GGTCA) of ERE-like or GTGT motif showed non-activity and non-response to EE2 exposure, thus a new hepcidin-associated element named as HepERE was revealed. Evidences from electrophoretic mobility shift assay (EMSA) and surface plasmon resonance (SPR) assay demonstrated that the EE2-mediated down-regulation of OM-hep1 expression was associated with ERα binding to HepERE but not classical ERE. Taken together, a novel signaling pathway was revealed and the regulatory mechanism associated with the ERα and HepERE element on immunomodulation of OM-hep1 expression upon EE2 exposure was first reported here.
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Affiliation(s)
- Min Zhang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China
| | - Meng-Fei Zhang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China; State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Xiamen University, Xiamen, Fujian, China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen University, Xiamen, Fujian, China
| | - Fang-Yi Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China; State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Xiamen University, Xiamen, Fujian, China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen University, Xiamen, Fujian, China
| | - Qian Cui
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China
| | - Bing-Zhen Yang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China
| | - Yong Liu
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China
| | - Hui Peng
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China; State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Xiamen University, Xiamen, Fujian, China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen University, Xiamen, Fujian, China
| | - Ke-Jian Wang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Science, Xiamen University, Xiamen, Fujian, China; State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Xiamen University, Xiamen, Fujian, China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen University, Xiamen, Fujian, China.
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14
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Kochmanski J, Marchlewicz EH, Dolinoy DC. Longitudinal effects of developmental bisphenol A, variable diet, and physical activity on age-related methylation in blood. ENVIRONMENTAL EPIGENETICS 2018; 4:dvy017. [PMID: 30046456 PMCID: PMC6054152 DOI: 10.1093/eep/dvy017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/09/2018] [Accepted: 05/09/2018] [Indexed: 05/16/2023]
Abstract
Research indicates that environmental factors can alter DNA methylation, but the specific effects of environmental exposures on epigenetic aging remain unclear. Here, using a mouse model of human-relevant exposures, we tested the hypothesis that early-life exposure to bisphenol A (BPA), variable diet, and/or changes in physical activity would modify rates of age-related methylation at several target regions, as measured from longitudinal blood samples (2, 4, and 10 months old). DNA methylation was quantified at two repetitive elements (LINE-1, IAP), two imprinted genes (Igf2, H19), and one non-imprinted gene (Esr1) in isogenic mice developmentally exposed to Control, Control + BPA (50 µg/kg diet), Western high-fat diet (WHFD), or Western + BPA diets. In blood samples, Esr1 DNA methylation increased significantly with age, but no other investigated loci showed significant age-related methylation. LINE-1 and IAP both showed significant negative environmental deflection by WHFD exposure (P < 0.05). Esr1also showed significant negative environmental deflection by WHFD exposure in female mice (P = 0.02), but not male mice. Physical activity had a non-significant positive effect on age-related Esr1 methylation in female blood, suggesting that it may partially abrogate the effects of WHFD on the aging epigenome. These results suggest that developmental nutritional exposures can modify age-related DNA methylation patterns at a gene related to growth and development. As such, environmental deflection of the aging epigenome may help to explain the growing prevalence of chronic diseases in human populations.
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Affiliation(s)
- Joseph Kochmanski
- Environmental Health Sciences, University of Michigan, School of Public Health, 1415 Washington Heights, Ann Arbor, MI, USA
| | - Elizabeth H Marchlewicz
- Environmental Health Sciences, University of Michigan, School of Public Health, 1415 Washington Heights, Ann Arbor, MI, USA
| | - Dana C Dolinoy
- Environmental Health Sciences, University of Michigan, School of Public Health, 1415 Washington Heights, Ann Arbor, MI, USA
- Nutritional Sciences, University of Michigan, School of Public Health, 1415 Washington Heights, Ann Arbor, MI, USA
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15
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Kubota T. Epigenetic Effect of Environmental Factors on Neurodevelopmenal Disorders. Nihon Eiseigaku Zasshi 2018; 71:200-207. [PMID: 27725423 DOI: 10.1265/jjh.71.200] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Epigenetics is an important mechanism of gene regulation that is dependent on the chromatin structure, which is determined by the epigenetic chemical modification of DNA and histone proteins. It is known that the failure of epigenetic mechanisms causes congenital neurodevelopmental disorders (NDs), and that early life exposure to mental stress and endocrine disrupting chemicals, such as phthalates, bisphenol A, and tobacco, can change epigenetic mechanism and gene expression in the brain and cause NDs. Moreover, environmentally induced epigenetic changes are not erased during gametogenesis and are transmitted to subsequent generations, leading to changes in behavior phenotypes. However, epigenetics has a reversible nature because it is based on the addition or removal of chemical residues, and thus the original epigenetic status may be restored. Indeed, several drugs used for mental disorders and NDs restore the epigenetic state and gene expression. Improved epigenetic understanding of NDs will provide important clues for the development of new drugs that take advantage of epigenetic reversibility.
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Affiliation(s)
- Takeo Kubota
- Department of Epigenetic Medicine, Faculty of Medicine, University of Yamanashi
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16
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Treviño LS, Katz TA. Endocrine Disruptors and Developmental Origins of Nonalcoholic Fatty Liver Disease. Endocrinology 2018; 159:20-31. [PMID: 29126168 PMCID: PMC5761605 DOI: 10.1210/en.2017-00887] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 11/01/2017] [Indexed: 02/07/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a growing epidemic worldwide, particularly in countries that consume a Western diet, and can lead to life-threatening conditions such as cirrhosis and hepatocellular carcinoma. With increasing prevalence of NAFLD in both children and adults, an understanding of the factors that promote NAFLD development and progression is crucial. Environmental agents, including endocrine-disrupting chemicals (EDCs), which have been linked to other diseases, may play a role in NAFLD development. Increasing evidence supports a developmental origin of liver disease, and early-life exposure to EDCs could represent one risk factor for the development of NAFLD later in life. Rodent studies provide the strongest evidence for this link, but further studies are needed to define whether there is a causal link between early-life EDC exposure and NAFLD development in humans. Elucidating the molecular mechanisms underlying development of NAFLD in the context of developmental EDC exposures may identify biomarkers for people at risk, as well as potential intervention and/or therapeutic opportunities for the disease.
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Affiliation(s)
- Lindsey S. Treviño
- Center for Precision Environmental Health, Baylor College of Medicine, Houston, Texas 77030
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030
| | - Tiffany A. Katz
- Center for Precision Environmental Health, Baylor College of Medicine, Houston, Texas 77030
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030
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17
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Cuomo D, Porreca I, Cobellis G, Tarallo R, Nassa G, Falco G, Nardone A, Rizzo F, Mallardo M, Ambrosino C. Carcinogenic risk and Bisphenol A exposure: A focus on molecular aspects in endoderm derived glands. Mol Cell Endocrinol 2017; 457:20-34. [PMID: 28111205 DOI: 10.1016/j.mce.2017.01.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 01/16/2017] [Accepted: 01/17/2017] [Indexed: 02/07/2023]
Abstract
Epidemiological and experimental evidence associates the exposure to Bisphenol A with the increase of cancer risk in several organs, including prostate. BPA targets different pathways involved in carcinogenicity including the Nuclear Receptors (i.e. estrogen and androgen receptors), stress regulated proteins and, finally, epigenetic changes. Here, we analyse BPA-dependent carcinogenesis in endoderm-derived glands, thyroid, liver, pancreas and prostate focusing on cell signalling, DNA damage repair pathways and epigenetic modifications. Mainly, we gather molecular data evidencing harmful effects at doses relevant for human risk (low-doses). Since few molecular data are available, above all for the pancreas, we analysed transcriptomic data generated in our laboratory to suggest possible mechanisms of BPA carcinogenicity in endoderm-derived glands, discussing the role of nuclear receptors and stress/NF-kB pathways. We evidence that an in vitro toxicogenomic approach might suggest mechanisms of toxicity applicable to cells having the same developmental origin. Although we cannot draw firm conclusions, published data summarized in this review suggest that exposure to BPA, primarily during the developmental stages, represents a risk for carcinogenesis of endoderm-derived glands.
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Affiliation(s)
- Danila Cuomo
- IRGS, Biogem, Via Camporeale, 83031 Ariano Irpino, Avellino, Italy; Department of Science and Technology, University of Sannio, via Port'Arsa 11, 82100 Benevento, Italy
| | | | - Gilda Cobellis
- Department of Experimental Medicine, Sez. Bozzatti, II University of Naples, 80138 Napoli, Italy
| | - Roberta Tarallo
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Giovanni Nassa
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy; Genomix4Life srl, Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Geppino Falco
- Department of Biology, University of Naples "Federico II", Napoli, Italy
| | - Antonio Nardone
- Department of Public Health, University of Naples "Federico II", Napoli, Italy
| | - Francesca Rizzo
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana", University of Salerno, 84081 Baronissi, SA, Italy
| | - Massimo Mallardo
- Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", Napoli, Italy
| | - Concetta Ambrosino
- Department of Science and Technology, University of Sannio, via Port'Arsa 11, 82100 Benevento, Italy.
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18
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Gassman NR. Induction of oxidative stress by bisphenol A and its pleiotropic effects. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2017; 58:60-71. [PMID: 28181297 PMCID: PMC5458620 DOI: 10.1002/em.22072] [Citation(s) in RCA: 180] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 11/18/2016] [Accepted: 12/19/2016] [Indexed: 05/23/2023]
Abstract
Bisphenol A (BPA) has become a target of intense public scrutiny since concerns about its association with human diseases such as obesity, diabetes, reproductive disorders, and cancer have emerged. BPA is a highly prevalent chemical in consumer products, and human exposure is thought to be ubiquitous. Numerous studies have demonstrated its endocrine disrupting properties and attributed exposure with cytotoxic, genotoxic, and carcinogenic effects; however, the results of these studies are still highly debated and a consensus about BPA's safety and its role in human disease has not been reached. One of the contributing factors is a lack of molecular mechanisms or modes of action that explain the diverse and pleiotropic effects observed after BPA exposure. The increase in BPA research seen over the last ten years has resulted in more studies that examine molecular mechanisms and revealed links between BPA-induced oxidative stress and human disease. Here, a review of the current literature examining BPA exposure and the induction of reactive oxygen species (ROS) or oxidative stress will be provided to examine the landscape of the current BPA literature and provide a framework for understanding how induction of oxidative stress by BPA may contribute to the pleiotropic effects observed after exposure. Environ. Mol. Mutagen. 58:60-71, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Natalie R Gassman
- University of South Alabama Mitchell Cancer Institute, Mobile, Alabama, 36604-1405
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19
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Sartain CV, Hunt PA. An old culprit but a new story: bisphenol A and "NextGen" bisphenols. Fertil Steril 2016; 106:820-6. [PMID: 27504789 PMCID: PMC5304938 DOI: 10.1016/j.fertnstert.2016.07.1114] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 07/06/2016] [Accepted: 07/22/2016] [Indexed: 12/16/2022]
Abstract
The concept that developmental events shape adult health and disease was sparked by the recognition of a link between maternal undernutrition and coronary disease in adults. From that beginning, a new field-the developmental origins of health and disease-emerged, and attention has focused on the effects of a wide array of developmental perturbations. Exposure to endocrine-disrupting chemicals has been of particular interest, and a ubiquitous environmental contaminant bisphenol A (BPA) has become the endocrine-disrupting chemical poster child. Bisphenol A has been the subject of intense investigation for nearly two decades, and exposure effects have been described in hundreds of experimental, epidemiological, and clinical studies. From the standpoint of reproductive health, the findings are particularly important, as they suggest that the ovary, testis, and reproductive tract in both sexes are targets of BPA action. The findings and the media and regulatory attention garnered by them have generated increasing public concern and resulted in legislative bans on BPA in some countries. The subsequent introduction of BPA-free products, although a masterful marketing strategy, is in reality only the beginning of a new and complex chapter of the BPA story. In this review we attempt to summarize what we have learned about the reproductive effects of BPA, present the reasons why studying the effects of this chemical in humans is no longer sufficient, and outline the challenges that the growing array of next generation bisphenols represents to clinicians, researchers, federal agencies, and the general public.
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Affiliation(s)
- Caroline V Sartain
- School of Molecular Biology, Washington State University, Pullman, Washington
| | - Patricia A Hunt
- School of Molecular Biology, Washington State University, Pullman, Washington.
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20
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Kubota T. Epigenetic alterations induced by environmental stress associated with metabolic and neurodevelopmental disorders. ENVIRONMENTAL EPIGENETICS 2016; 2:dvw017. [PMID: 29492297 PMCID: PMC5804531 DOI: 10.1093/eep/dvw017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/14/2016] [Accepted: 07/18/2016] [Indexed: 06/08/2023]
Abstract
Epigenetics is a gene regulation mechanism that does not depend on genomic DNA sequences but depends on chemical modification of genomic DNA and histone proteins around which DNA is wrapped. The failure of epigenetic mechanisms is known to cause various congenital disorders. It is also known that the failures of epigenetic mechanisms causes various acquired disorders since epigenetic modifications of the genome (i.e., "epigenome") are more vulnerable to environmental stress, such as malnutrition, environmental chemicals, and mental stress, than the "genome," especially during the early period of life. However, the epigenome has a reversible property since it is based on removable residues on genomic DNA. Thus, environmentally induced epigenomic alterations can be potentially restored. In fact, some medicines, especially for psychiatric diseases, are known to restore an altered epigenome, resulting in the correction of gene expression. Several lines of evidence suggest that environmentally induced epigenomic alterations are not erased completely during gametogenesis, but are transmitted to subsequent generations with disease phenotypes. In accordance with these understandings, I would like to propose the development of epigenomic-based preemptive medicine that consists of the early detection of the developmental origins of diseases using epigenomic signatures and the early intervention that take advantages of the use of epigenomic reversibility.
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Affiliation(s)
- Takeo Kubota
- Department of Epigenetic Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, 409-3898, Japan
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21
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Li Q, Davila J, Bagchi MK, Bagchi IC. Chronic exposure to bisphenol a impairs progesterone receptor-mediated signaling in the uterus during early pregnancy. ACTA ACUST UNITED AC 2016; 3. [PMID: 28239613 PMCID: PMC5321573 DOI: 10.14800/rci.1369] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Environmental and occupational exposure to endocrine disrupting chemicals (EDCs) is a major threat to female reproductive health. Bisphenol A (BPA), an environmental toxicant that is commonly found in polycarbonate plastics and epoxy resins, has received much attention due to its estrogenic activity and high risk of chronic exposure in human. Whereas BPA has been linked to infertility and recurrent miscarriage in women, the impact of its exposure on uterine function during early pregnancy remains unclear. In a recent publication in Endocrinology, we demonstrated that prolonged exposure to an environmental relevant dose of BPA disrupts progesterone receptor-regulated uterine functions, thus affecting uterine receptivity for embryo implantation and decidua morphogenesis, two critical events for establishment and maintenance of early pregnancy. In particular we reported a marked impairment of progesterone receptor (PGR) expression and its downstream effector HAND2 in the uterine stromal cells in response to chronic BPA exposure. In an earlier study we have shown that HAND2 controls embryo implantation by repressing fibroblast growth factor (FGF) expression and the MAP kinase signaling pathway, thus inhibiting epithelial proliferation. Interestingly we observed that downregulation of PGR and HAND2 expression in uterine stroma upon BPA exposure was associated with an enhanced activation of FGFR and MAPK signaling, aberrant proliferation, and lack of uterine receptivity in the epithelium. In addition, the proliferation and differentiation of endometrial stromal cells to decidual cells, an event critical for the maintenance of early pregnancy, was severely compromised in response to BPA. This research highlight will provide an overview of our findings and discuss the potential mechanisms by which chronic BPA impairs PGR-HAND2 pathway and adversely affects implantation and the establishment of pregnancy.
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Affiliation(s)
- Quanxi Li
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802, USA
| | - Juanmahel Davila
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802, USA
| | - Milan K Bagchi
- Departments of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802, USA
| | - Indrani C Bagchi
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802, USA
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22
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Weinhouse C, Sartor MA, Faulk C, Anderson OS, Sant KE, Harris C, Dolinoy DC. Epigenome-wide DNA methylation analysis implicates neuronal and inflammatory signaling pathways in adult murine hepatic tumorigenesis following perinatal exposure to bisphenol A. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2016; 57:435-46. [PMID: 27334623 PMCID: PMC4945497 DOI: 10.1002/em.22024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 05/03/2016] [Accepted: 04/25/2016] [Indexed: 05/28/2023]
Abstract
Developmental exposure to the endocrine-active compound bisphenol A (BPA) has been linked to epigenotoxic and potential carcinogenic effects in rodent liver, prostate, and mammary glands. A dose-dependent increase in hepatic tumors in 10-month mice perinatally exposed to one of three doses of BPA (50 ng, 50 µg, or 50 mg BPA/kg chow) was previously reported. These tumors represent early-onset disease and lack classical sexual dimorphism in incidence. Here, adult epigenome-wide liver DNA methylation profiles to identify gene promoters associated with perinatal BPA exposure and disease in 10-month mice with and without liver tumors were investigated. Mice with hepatic tumors showed 12,822 (1.8%) probes with differential methylation as compared with non-tumor animals, of which 8,656 (67.5%) were hypomethylated. A significant enrichment of differential methylation in Gene Ontology (GO) terms and biological processes related to morphogenesis and development, and epigenomic alteration were observed. Pathway enrichment revealed a predominance of hypermethylated neuronal signaling pathways linked to energy regulation and metabolic function, supporting metabolic consequences in the liver via BPA-induced disruption of neuronal signaling pathways. Hypothesis-driven pathway analysis revealed mouse and human genes linked to BPA exposure related to intracellular Jak/STAT and MAPK signaling pathways. Taken together, these findings are indicators of the relevance of the hepatic tumor phenotype seen in BPA-exposed mice to human health. This work demonstrated that epigenome-wide discovery experiments in animal models were effective tools for identification and understanding of paralagous epimutations salient to human disease. Environ. Mol. Mutagen. 57:435-446, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Caren Weinhouse
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Maureen A. Sartor
- Department of Biostatistics, University of Michigan, Ann Arbor, Michigan, USA
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan, USA
| | - Christopher Faulk
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Olivia S. Anderson
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Karilyn E. Sant
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Craig Harris
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Dana C. Dolinoy
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan, USA
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan, USA
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23
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Kubota T, Mochizuki K. Epigenetic Effect of Environmental Factors on Autism Spectrum Disorders. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13050504. [PMID: 27187441 PMCID: PMC4881129 DOI: 10.3390/ijerph13050504] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 04/23/2016] [Accepted: 05/10/2016] [Indexed: 12/22/2022]
Abstract
Both environmental factors and genetic factors are involved in the pathogenesis of autism spectrum disorders (ASDs). Epigenetics, an essential mechanism for gene regulation based on chemical modifications of DNA and histone proteins, is also involved in congenital ASDs. It was recently demonstrated that environmental factors, such as endocrine disrupting chemicals and mental stress in early life, can change epigenetic status and gene expression, and can cause ASDs. Moreover, environmentally induced epigenetic changes are not erased during gametogenesis and are transmitted to subsequent generations, leading to changes in behavior phenotypes. However, epigenetics has a reversible nature since it is based on the addition or removal of chemical residues, and thus the original epigenetic status may be restored. Indeed, several antidepressants and anticonvulsants used for mental disorders including ASDs restore the epigenetic state and gene expression. Therefore, further epigenetic understanding of ASDs is important for the development of new drugs that take advantages of epigenetic reversibility.
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Affiliation(s)
- Takeo Kubota
- Department of Epigenetic Medicine, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi 409-3898, Japan.
| | - Kazuki Mochizuki
- Department of Local Produce and Food Sciences, Faculty of Life and Environmental Sciences, University of Yamanashi, 4-4-37 Takeda, Kofu-City, Yamanashi 400-8510, Japan.
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24
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Li Q, Davila J, Kannan A, Flaws JA, Bagchi MK, Bagchi IC. Chronic Exposure to Bisphenol A Affects Uterine Function During Early Pregnancy in Mice. Endocrinology 2016; 157:1764-74. [PMID: 27022677 PMCID: PMC4870880 DOI: 10.1210/en.2015-2031] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Environmental and occupational exposure to bisphenol A (BPA), a chemical widely used in polycarbonate plastics and epoxy resins, has received much attention in female reproductive health due to its widespread toxic effects. Although BPA has been linked to infertility and recurrent miscarriage in women, the impact of its exposure on uterine function during early pregnancy remains unclear. In this study, we addressed the effect of prolonged exposure to an environmental relevant dose of BPA on embryo implantation and establishment of pregnancy. Our studies revealed that treatment of mice with BPA led to improper endometrial epithelial and stromal functions thus affecting embryo implantation and establishment of pregnancy. Upon further analyses, we found that the expression of progesterone receptor (PGR) and its downstream target gene, HAND2 (heart and neural crest derivatives expressed 2), was markedly suppressed in BPA-exposed uterine tissues. Previous studies have shown that HAND2 controls embryo implantation by repressing fibroblast growth factor and the MAPK signaling pathways and inhibiting epithelial proliferation. Interestingly, we observed that down-regulation of PGR and HAND2 expression in uterine stroma upon BPA exposure was associated with enhanced activation of fibroblast growth factor and MAPK signaling in the epithelium, thus contributing to aberrant proliferation and lack of uterine receptivity. Further, the differentiation of endometrial stromal cells to decidual cells, an event critical for the establishment and maintenance of pregnancy, was severely compromised in response to BPA. In summary, our studies revealed that chronic exposure to BPA impairs PGR-HAND2 pathway and adversely affects implantation and the establishment of pregnancy.
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Affiliation(s)
- Quanxi Li
- Department of Comparative Biosciences (Q.L., J.D., A.K., J.A.F., I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Juanmahel Davila
- Department of Comparative Biosciences (Q.L., J.D., A.K., J.A.F., I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Athilakshmi Kannan
- Department of Comparative Biosciences (Q.L., J.D., A.K., J.A.F., I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Jodi A Flaws
- Department of Comparative Biosciences (Q.L., J.D., A.K., J.A.F., I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Milan K Bagchi
- Department of Comparative Biosciences (Q.L., J.D., A.K., J.A.F., I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Indrani C Bagchi
- Department of Comparative Biosciences (Q.L., J.D., A.K., J.A.F., I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
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