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Fernández-Vizcaíno E, Mateo R, Fernández de Mera IG, Mougeot F, Camarero PR, Ortiz-Santaliestra ME. Transgenerational effects of triazole fungicides on gene expression and egg compounds in non-exposed offspring: A case study using Red-Legged Partridges (Alectoris rufa). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171546. [PMID: 38479527 DOI: 10.1016/j.scitotenv.2024.171546] [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: 01/08/2024] [Revised: 03/04/2024] [Accepted: 03/04/2024] [Indexed: 03/26/2024]
Abstract
Triazole fungicides are widely used to treat cereal seeds before sowing. Granivorous birds like the Red-legged Partridge (Alectoris rufa) have high exposure risk because they ingest treated seeds that remain on the field surface. As triazole fungicides can act as endocrine disruptors, affecting sterol synthesis and reproduction in birds several months after exposure, we hypothesized that these effects could also impact subsequent generations of exposed birds. To test this hypothesis, we exposed adult partridges (F0) to seeds treated at commercial doses with four different formulations containing triazoles as active ingredients (flutriafol, prothioconazole, tebuconazole, and a mixture of the latter two), simulating field exposure during late autumn sowing. During the subsequent reproductive season, two to four months after exposure, we examined compound allocation of steroid hormones, cholesterol, vitamins, and carotenoids in eggs laid by exposed birds (F1), as well as the expression of genes encoding enzymes involved in sterol biosynthesis in one-day-old chicks of this F1. One year later, F1 animals were paired again to investigate the expression of the same genes in the F2 chicks. We found changes in the expression of some genes for all treatments and both generations. Additionally, we observed an increase in estrone levels in eggs from partridges treated with flutriafol compared to controls, a decrease in tocopherol levels in partridges exposed to the mixture of tebuconazole and prothioconazole, and an increase in retinol levels in partridges exposed to prothioconazole. Despite sample size limitations, this study provides novel insights into the mechanisms of action of the previously observed effects of triazole fungicide-treated seeds on avian reproduction with evidence that the effects can persist beyond the exposure windows, affecting unexposed offspring of partridges fed with treated seeds. The results highlight the importance of considering long-term chronic effects when assessing pesticide risks to wild birds.
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Affiliation(s)
- Elena Fernández-Vizcaíno
- Instituto de Investigación en Recursos Cinegéticos (IREC) CSIC-UCLM-JCCM, Ronda de Toledo 12, 13005 Ciudad Real, Spain.
| | - Rafael Mateo
- Instituto de Investigación en Recursos Cinegéticos (IREC) CSIC-UCLM-JCCM, Ronda de Toledo 12, 13005 Ciudad Real, Spain
| | - Isabel G Fernández de Mera
- Instituto de Investigación en Recursos Cinegéticos (IREC) CSIC-UCLM-JCCM, Ronda de Toledo 12, 13005 Ciudad Real, Spain
| | - François Mougeot
- Instituto de Investigación en Recursos Cinegéticos (IREC) CSIC-UCLM-JCCM, Ronda de Toledo 12, 13005 Ciudad Real, Spain
| | - Pablo R Camarero
- Instituto de Investigación en Recursos Cinegéticos (IREC) CSIC-UCLM-JCCM, Ronda de Toledo 12, 13005 Ciudad Real, Spain
| | - Manuel E Ortiz-Santaliestra
- Instituto de Investigación en Recursos Cinegéticos (IREC) CSIC-UCLM-JCCM, Ronda de Toledo 12, 13005 Ciudad Real, Spain
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2
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Muñoz JP, Araya-Osorio R, Mera-Adasme R, Calaf GM. Glyphosate mimics 17β-estradiol effects promoting estrogen receptor alpha activity in breast cancer cells. CHEMOSPHERE 2023; 313:137201. [PMID: 36379430 DOI: 10.1016/j.chemosphere.2022.137201] [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: 08/24/2022] [Revised: 11/05/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
Glyphosate, the active ingredient in several broad-spectrum herbicide formulations, has been validated and widely used throughout the world. Recent reports have questioned its safety, showing that glyphosate may act as an endocrine disruptor by promoting estrogenic activity. However, the molecular mechanism involved in this phenomenon remains unclear. Therefore, here we aimed to elucidate the mechanism by which glyphosate induces estrogenic activity using estrogen-sensitive breast cancer cell line models. Our results show that glyphosate mimics the cell effects of 17β-estradiol (E2), promoting estrogen receptor α (ERα) phosphorylation, its degradation, and transcriptional activity at high concentrations. The molecular mechanism seems involved in the ERα ligand-binding domain (LBD). Molecular simulations suggest a plausible interaction between glyphosate and the LBD through a coordinated complex involving divalent cations such as Zn (II). In addition, glyphosate exposure alters the level of Cyclin-dependent kinase 7 that contribute to ERα phosphorylation. Finally, glyphosate increases cell proliferation rate and levels of cell cycle regulators, accompanied by an increase in anchorage-independent growth capacity. These findings suggest that glyphosate at high concentrations, induces estrogen-like effects through an ERα ligand binding site-dependent mechanism, leading to cellular responses resulting from a complex interplay of genomic and non-genomic events.
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Affiliation(s)
- Juan P Muñoz
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica, 1000000, Chile.
| | - Rocío Araya-Osorio
- Department of Environmental Sciences, Faculty of Chemistry and Biology, Universidad de Santiago de Chile (USACH), Chile.
| | - Raúl Mera-Adasme
- Department of Environmental Sciences, Faculty of Chemistry and Biology, Universidad de Santiago de Chile (USACH), Chile.
| | - Gloria M Calaf
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica, 1000000, Chile.
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3
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Elcombe CS, Evans NP, Bellingham M. Critical review and analysis of literature on low dose exposure to chemical mixtures in mammalian in vivo systems. Crit Rev Toxicol 2022; 52:221-238. [PMID: 35894754 PMCID: PMC9530410 DOI: 10.1080/10408444.2022.2091423] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Anthropogenic chemicals are ubiquitous throughout the environment. Consequentially, humans are exposed to hundreds of anthropogenic chemicals daily. Current chemical risk assessments are primarily based on testing individual chemicals in rodents at doses that are orders of magnitude higher than that of human exposure. The potential risk from exposure to mixtures of chemicals is calculated using mathematical models of mixture toxicity based on these analyses. These calculations, however, do not account for synergistic or antagonistic interactions between co-exposed chemicals. While proven examples of chemical synergy in mixtures at low doses are rare, there is increasing evidence that, through non-conformance to current mixture toxicity models, suggests synergy. This review examined the published studies that have investigated exposure to mixtures of chemicals at low doses in mammalian in vivo systems. Only seven identified studies were sufficient in design to directly examine the appropriateness of current mixture toxicity models, of which three showed responses significantly greater than additivity model predictions. While the remaining identified studies were unable to provide evidence of synergistic toxicity, it became apparent that many results of such studies were not always explicable by current mixture toxicity models. Additionally, two data gaps were identified. Firstly, there is a lack of studies where individual chemical components of a complex mixture (>10 components) are tested in parallel to the chemical mixture. Secondly, there is a lack of dose-response data for mixtures of chemicals at low doses. Such data is essential to address the appropriateness and validity of future chemical mixture toxicity models.
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Affiliation(s)
- Chris S Elcombe
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.,School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Neil P Evans
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Michelle Bellingham
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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Conley JM, Lambright CS, Evans N, Cardon M, Medlock-Kakaley E, Wilson VS, Gray LE. A mixture of 15 phthalates and pesticides below individual chemical no observed adverse effect levels (NOAELs) produces reproductive tract malformations in the male rat. ENVIRONMENT INTERNATIONAL 2021; 156:106615. [PMID: 34000504 PMCID: PMC8380680 DOI: 10.1016/j.envint.2021.106615] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/28/2021] [Accepted: 04/29/2021] [Indexed: 05/10/2023]
Abstract
Humans carry residues of multiple synthetic chemicals at any given point in time. Research has demonstrated that compounds with varying molecular initiating events (MIE) that disrupt common key events can act in concert to produce cumulative adverse effects. Congenital defects of the male reproductive tract are some of the most frequently diagnosed malformations in humans and chemical exposures in utero can produce these effects in laboratory animals and humans. Here, we hypothesized that in utero exposure to a mixture of pesticides and phthalates, each of which produce male reproductive tract defects individually, would produce cumulative effects even when each chemical is present at a no observed adverse effect level (NOAEL) specific for male reproductive effects. Pregnant Sprague-Dawley rats were exposed via oral gavage to a fixed-ratio dilution mixture of 5 pesticides (vinclozolin, linuron, procymidone, prochloraz, pyrifluquinazon), 1 pesticide metabolite (dichlorodiphenyldichloroethylene (DDE)), and 9 phthalates (dipentyl, dicyclohexyl, di-2-ethylhexyl, dibutyl, benzyl butyl, diisobutyl, diisoheptyl, dihexyl, and diheptyl) during the critical window of rat fetal masculinization (gestation day 14-18). The top dose (100% dose) contained each compound at a concentration 2-fold greater than the individual chemical NOAEL followed by a dilution series that represented each chemical at NOAEL, NOAEL/2, NOAEL/4, NOAEL/8, NOAEL/15, NOAEL/100, NOAEL/1000. Reduced fetal testis gene expression occurred at NOAEL/15, reduced fetal testis testosterone production occurred at NOAEL/8, reduced anogenital distance, increased nipple retention, and delayed puberty occurred at NOAEL/4, and severe effects including genital malformations and weight reductions in numerous reproductive tissues occurred at NOAEL/2. This study demonstrates that these phthalates and pesticides acted cumulatively to produce adverse effects at doses below which any individual chemical had been shown to produce an effect alone and even though they have different MIEs.
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Affiliation(s)
- Justin M Conley
- U.S. Environmental Protection Agency/Office of Research & Development/Center for Public Health and Environmental Assessment/Public Health and Integrated Toxicology Division, Research Triangle Park, NC 27711, United States.
| | - Christy S Lambright
- U.S. Environmental Protection Agency/Office of Research & Development/Center for Public Health and Environmental Assessment/Public Health and Integrated Toxicology Division, Research Triangle Park, NC 27711, United States.
| | - Nicola Evans
- U.S. Environmental Protection Agency/Office of Research & Development/Center for Public Health and Environmental Assessment/Public Health and Integrated Toxicology Division, Research Triangle Park, NC 27711, United States.
| | - Mary Cardon
- U.S. Environmental Protection Agency/Office of Research & Development/Center for Public Health and Environmental Assessment/Public Health and Integrated Toxicology Division, Research Triangle Park, NC 27711, United States.
| | - Elizabeth Medlock-Kakaley
- U.S. Environmental Protection Agency/Office of Research & Development/Center for Public Health and Environmental Assessment/Public Health and Integrated Toxicology Division, Research Triangle Park, NC 27711, United States.
| | - Vickie S Wilson
- U.S. Environmental Protection Agency/Office of Research & Development/Center for Public Health and Environmental Assessment/Public Health and Integrated Toxicology Division, Research Triangle Park, NC 27711, United States.
| | - L Earl Gray
- U.S. Environmental Protection Agency/Office of Research & Development/Center for Public Health and Environmental Assessment/Public Health and Integrated Toxicology Division, Research Triangle Park, NC 27711, United States.
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Lini RS, Aguera RG, Hoeltgebaum D, Paniz FP, Pedron T, Capelari S, Monteiro LR, Machinski Junior M, Nerilo SB, Batista BL, de Oliveira MLF, Mossini SAG. Elemental plasma content and urinary excretion in vineyard farmers occupationally exposed to pesticides in southern Brazil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:51841-51853. [PMID: 33991300 DOI: 10.1007/s11356-021-14384-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 05/10/2021] [Indexed: 06/12/2023]
Abstract
This is a cross-sectional study with data and biological material collection from vineyard farmers in southern Brazil. An interview was carried out through a questionnaire developed according to the reference guide of the state government. Plasma and urine samples were screened for Aluminum, Chromium, Manganese, Copper, Nickel, Cobalt, Zinc, Arsenic, Selenium, Cadmium, Antimony, Barium, Mercury, Lead and Uranium, with a technique for fast determination of these elemental contents in biological material utilizing dynamic reaction cell inductively coupled mass spectrometry. Principal component analysis was used to identify associations between these elemental contents in biological samples and the information obtained from the interviews. The farmers showed some trace elements in plasma and urine at a higher concentration than unexposed populations from other studies. This study highlights recent findings of trace elements in biological material and their association with characteristics of pesticide use. In addition, it also contributes to the gap in the literature regarding trace elements content in plasma and urine of workers exposed to pesticides.
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Affiliation(s)
- Renata Sano Lini
- Postgraduate Program in Biosciences and Physiopathology, State University of Maringá, Maringá, Paraná, Brazil
| | - Raul Gomes Aguera
- Postgraduate Program in Biosciences and Physiopathology, State University of Maringá, Maringá, Paraná, Brazil
| | - Danielle Hoeltgebaum
- Postgraduate Program in Health Sciences, State University of Maringá, Maringá, Paraná, Brazil
| | - Fernanda Pollo Paniz
- Center for Natural Sciences and Humanities, Federal University of ABC (UFABC), Santo André, São Paulo, Brazil
| | - Tatiana Pedron
- Center for Natural Sciences and Humanities, Federal University of ABC (UFABC), Santo André, São Paulo, Brazil
| | - Silvia Capelari
- Paraná Rural Development Institute (IDR - PR), Marialva, Paraná, Brazil
| | - Lucilena Rebelo Monteiro
- Centro de Química e Meio Ambiente (CEQMA), Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP), São Paulo, Brazil
| | - Miguel Machinski Junior
- Postgraduate Program in Health Sciences, State University of Maringá, Maringá, Paraná, Brazil
| | | | - Bruno Lemos Batista
- Center for Natural Sciences and Humanities, Federal University of ABC (UFABC), Santo André, São Paulo, Brazil
| | | | - Simone Aparecida Galerani Mossini
- Postgraduate Program in Biosciences and Physiopathology, State University of Maringá, Maringá, Paraná, Brazil.
- Department of Health Basic Sciences, Laboratory of Toxicology, State University of Maringa, Avenue Colombo no 5790, Maringa, PR, 87020-900, Brazil.
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López-Rodríguez D, Aylwin CF, Delli V, Sevrin E, Campanile M, Martin M, Franssen D, Gérard A, Blacher S, Tirelli E, Noël A, Lomniczi A, Parent AS. Multi- and Transgenerational Outcomes of an Exposure to a Mixture of Endocrine-Disrupting Chemicals (EDCs) on Puberty and Maternal Behavior in the Female Rat. ENVIRONMENTAL HEALTH PERSPECTIVES 2021; 129:87003. [PMID: 34383603 PMCID: PMC8360047 DOI: 10.1289/ehp8795] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 05/26/2023]
Abstract
BACKGROUND The effects of endocrine-disrupting chemicals (EDCs) on fertility and reproductive development represent a rising concern in modern societies. Although the neuroendocrine control of sexual maturation is a major target of EDCs, little is known about the potential role of the hypothalamus in puberty and ovulation disruption transmitted across generations. OBJECTIVES We hypothesized that developmental exposure to an environmentally relevant dose of EDC mixture could induce multi- and/or transgenerational alterations of sexual maturation and maternal care in female rats through epigenetic reprograming of the hypothalamus. We investigated the transmission of a disrupted reproductive phenotype via the maternal germline or via nongenomic mechanisms involving maternal care. METHODS Adult female Wistar rats were exposed prior to and during gestation and until the end of lactation to a mixture of the following 13 EDCs: di-n-butyl phthalate (DnBP), di(2-ethylhexyl) phthalate (DEHP), bisphenol A (BPA), vinclozolin, prochloraz, procymidone, linuron, epoxynaxole, dichlorodiphenyldichloroethylene, octyl methoxynimmate, 4-methylbenzylidene camphor (4-MBC), butylparaben, and acetaminophen. Perinatally exposed offspring (F1) were mated with unexposed males to generate germ cell (F2) and transgenerationally exposed (F3 and F4) females. Sexual maturation, maternal behavior, and hypothalamic targets of exposure were studied across generations. RESULTS Germ cell (F2) and transgenerationally (F3) EDC-exposed females, but not F1, displayed delayed pubertal onset and altered folliculogenesis. We reported a transgenerational alteration of key hypothalamic genes controlling puberty and ovulation (Kiss1, Esr1, and Oxt), and we identified the hypothalamic polycomb group of epigenetic repressors as actors of this mechanism. Furthermore, we found a multigenerational reduction of maternal behavior (F1-F3) induced by a loss in hypothalamic dopaminergic signaling. Using a cross-fostering paradigm, we identified that the reduction in maternal phenotype was normalized in EDC-exposed pups raised by unexposed dams, but no reversal of the pubertal phenotype was achieved. DISCUSSION Rats developmentally exposed to an EDC mixture exhibited multi- and transgenerational disruption of sexual maturation and maternal care via hypothalamic epigenetic reprogramming. These results raise concerns about the impact of EDC mixtures on future generations. https://doi.org/10.1289/EHP8795.
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Affiliation(s)
| | - Carlos Francisco Aylwin
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | | | - Elena Sevrin
- GIGA Neurosciences, Neuroendocrinology Unit, University of Liège, Liège, Belgium
| | - Marzia Campanile
- GIGA Neurosciences, Neuroendocrinology Unit, University of Liège, Liège, Belgium
| | - Marion Martin
- Lille Neuroscience & Cognition (LilNCog), Institut national de la santé et de la recherche médicale (Inserm), CHU Lille, Lille, France
| | - Delphine Franssen
- GIGA Neurosciences, Neuroendocrinology Unit, University of Liège, Liège, Belgium
| | - Arlette Gérard
- GIGA Neurosciences, Neuroendocrinology Unit, University of Liège, Liège, Belgium
| | - Silvia Blacher
- Tumor and Development Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Ezio Tirelli
- Department of Psychology: Cognition and Behavior, University of Liège, Liège, Belgium
| | - Agnès Noël
- Tumor and Development Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Alejandro Lomniczi
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Anne-Simone Parent
- GIGA Neurosciences, Neuroendocrinology Unit, University of Liège, Liège, Belgium
- Department of Pediatrics, University Hospital Liège, Liège, Belgium
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7
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Elcombe CS, Monteiro A, Ghasemzadeh-Hasankolaei M, Evans NP, Bellingham M. Morphological and transcriptomic alterations in neonatal lamb testes following developmental exposure to low-level environmental chemical mixture. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2021; 86:103670. [PMID: 33964400 PMCID: PMC8316325 DOI: 10.1016/j.etap.2021.103670] [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] [Received: 02/11/2021] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 05/29/2023]
Abstract
Exposure to anthropogenic environmental chemical mixtures could be contributing to the decline in male reproductive health. This study used the biosolid treated pasture (BTP) sheep model to assess the effects of exposure to low-dose chemical mixtures. Maternal BTP exposure was associated with lower plasma testosterone concentrations, a greater proportion of Sertoli cell-only seminiferous tubules, and fewer gonocytes in the testes of neonatal offspring. Transcriptome analysis highlighted changes in testicular mTOR signalling, including lower expression of two mTOR complex components. Transcriptomic hierarchical analysis relative to the phenotypic severity demonstrated distinct differential responses to maternal BTP exposure during pregnancy. Transcriptome analysis between phenotypically normal and abnormal BTP lambs demonstrated separate responses within the cAMP and PI3K signalling pathways towards CREB. Together, the results provide a potential mechanistic explanation for adverse effects. Exposure could lower gonocyte numbers through mTOR mediated autophagy, but CREB mediated survival factors may act to increase germ cell survival.
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Affiliation(s)
- Chris S Elcombe
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, UK; School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, UK.
| | - Ana Monteiro
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, UK
| | - Mohammad Ghasemzadeh-Hasankolaei
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, UK
| | - Neil P Evans
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, UK
| | - Michelle Bellingham
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, UK.
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Suna PA, Cengız O, Ceyhan A, Atay E, Ertekin T, Nısarı M, Yay A. The protective role of curcumin against toxic effect of nonylphenol on bone development. Hum Exp Toxicol 2021; 40:S63-S76. [PMID: 34219512 DOI: 10.1177/09603271211030548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION In the study, it was aimed to investigate the possible protective effects of curcumin, a potent antioxidant, against the toxic effect of nonylphenol on bone development. METHODS Thirty pregnant female Wistar albino rats were used. The rats were randomly divided into the following five groups; the control group, corn oil group (150 µl/kg/day), nonylphenol group (50 µl/kg/day), curcumin group (100 mg/kg/day) and curcumin + nonylphenol group (100 mg/kg/day + 50 µl/kg/day). The doses were given by gavage from the 5th day to the 20th day of gestation. The fetuses were removed out on the 20th day of pregnancy by cesarean at the end of the study. After the sacrifice of the animals, double skeletal staining in front extremity (clavicula, scapula, humerus, radius, ulna) and hind extremity (femur, tibia, fibula), additionally histological and immunohistochemical examinations in femur bone were performed. RESULTS The nonylphenol group offspring have the lowest weights of fetuses and placenta, head-to-hip lengths, biparietal and occipitofrontal length, and also, bone length percentage and percentage of the ossification area in all measurements of the front extremity and hind extremity Interestingly, the groups treated with curcumin showed close to the control group in terms of double skeletal staining, histological, and immunohistochemical examinations. CONCLUSIONS Our findings demonstrated an association between bone development and exposure to nonylphenol. The findings suggest that curcumin treatments may be effective in accelerating bone formation.
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Affiliation(s)
- P Alısan Suna
- Department of Histology and Embryology, Erciyes University, Faculty of Medicine, Kayseri, Turkey
| | - O Cengız
- Department of Histology and Embryology, Erciyes University, Faculty of Medicine, Kayseri, Turkey
| | - A Ceyhan
- Department of Histology and Embryology, Erciyes University, Faculty of Medicine, Kayseri, Turkey.,Tokat Health Services Vocational School/Medical Services and Techniques Department, Tokat Gaziosmanpaşa University, Tokat, Turkey
| | - E Atay
- Department of Anatomy, Medicine Faculty, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - T Ertekin
- Department of Anatomy, Medicine Faculty, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - M Nısarı
- Department of Anatomy, Erciyes University, Faculty of Medicine, Kayseri, Turkey
| | - A Yay
- Department of Histology and Embryology, Erciyes University, Faculty of Medicine, Kayseri, Turkey.,Genome and Stem Cell Center (GENKOK), Erciyes University, Kayseri, Turkey
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Ying Y, Pan P, Zou C, Wang Y, Tang Y, Hou X, Li Y, Xu Q, Lin L, Lu J, Ge RS. Tebuconazole exposure disrupts placental function and causes fetal low birth weight in rats. CHEMOSPHERE 2021; 264:128432. [PMID: 33049508 DOI: 10.1016/j.chemosphere.2020.128432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/17/2020] [Accepted: 09/22/2020] [Indexed: 06/11/2023]
Abstract
Tebuconazole (TEB) is one of the widely used broad-spectrum triazole fungicides. Its accumulation in mammals leads to various endocrine disruptions. However, it is unclear whether the exposure of TEB during pregnancy affects the growth and development of fetus and placenta. Here, TEB was exposed to pregnant Sprague-Dawley female rats from gestational days 12-21 of 0, 25, 50 or 100 mg/kg for 10 days. TEB reduced placental estradiol levels. TEB disrupted the structure and function of the placenta, leading to hypertrophy, fibrin exudation, edema, calcification, arterial fibroblast proliferation, and trophoblastic infarction. RNA-seq analysis showed that TEB mainly down-regulated the expression of iron transport genes and up-regulated the expression of genes for immune/inflammatory responses. Further qPCR showed that TEB down-regulated Tfrc, Hamp, Eif2ak2 and up-regulated the expression of Cd34, Cd36, Jag1, Pln, Cyp1a1, Esrra, and Aqp1 at 50 and 100 mg/kg. Western blot and semi-quantitative immunohistochemical staining also demonstrated that TEB lowered the levels of TFRC and EIF2AK2 and increased the levels of CD34, CD36, JAG1, CYP1A1, and ESRRA at 50 and 100 mg/kg. In conclusion, TEB severely damages the structure and function of the placenta, leading to hypertrophy of the placenta, low birth weight and feminization of the male fetus possibly via several pathways including iron transport and TNF signaling.
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Affiliation(s)
- Yingfen Ying
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Peipei Pan
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Cheng Zou
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Yiyan Wang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Yunbing Tang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Xiaohong Hou
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Yang Li
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Qiang Xu
- Department of Pathology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Liben Lin
- Department of Pathology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China
| | - Jieqiang Lu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China.
| | - Ren-Shan Ge
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, PR China.
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Bianchi S, Nottola SA, Torge D, Palmerini MG, Necozione S, Macchiarelli G. Association between Female Reproductive Health and Mancozeb: Systematic Review of Experimental Models. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17072580. [PMID: 32283742 PMCID: PMC7177957 DOI: 10.3390/ijerph17072580] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/05/2020] [Accepted: 04/07/2020] [Indexed: 11/29/2022]
Abstract
Mancozeb is a widely used fungicide approved for use in agriculture in many countries with long persistence in the environment and consequent bioaccumulation in tissues and biological fluids. Despite the large amount of studies published in recent years, the relationship between mancozeb exposure and female reproductive health is not fully elucidated. In order to summarize current evidence on mancozeb exposure and female reproductive disease, we performed a systematic review of literature. Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were used to make this review. An adapted version of the National Toxicology Program’s Office of Health and Assessment and Translation (OHAT) framework was used to evaluate the risk of bias. Electronic search on two databases (PubMed and Scopus) was used to find experimental studies (in vitro and in vivo) on mancozeb exposure. The database search identified 250 scientific articles, 20 of which met our inclusion criteria. Selected data were then reviewed and summarized in tables. Overall, mancozeb represents a hazard for female reproductive health, with different mechanisms of action. Undoubtedly more experimental and epidemiological studies are required to definitively validate mancozeb as reproductive toxicant.
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Affiliation(s)
- Serena Bianchi
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (S.B.); (D.T.); (M.G.P.); (S.N.); (G.M.)
| | - Stefania Annarita Nottola
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, La Sapienza University of Rome, 00161 Rome, Italy
- Correspondence: ; Tel.: +39-06-4991-8072
| | - Diana Torge
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (S.B.); (D.T.); (M.G.P.); (S.N.); (G.M.)
| | - Maria Grazia Palmerini
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (S.B.); (D.T.); (M.G.P.); (S.N.); (G.M.)
| | - Stefano Necozione
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (S.B.); (D.T.); (M.G.P.); (S.N.); (G.M.)
| | - Guido Macchiarelli
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (S.B.); (D.T.); (M.G.P.); (S.N.); (G.M.)
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11
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Yilmaz B, Terekeci H, Sandal S, Kelestimur F. Endocrine disrupting chemicals: exposure, effects on human health, mechanism of action, models for testing and strategies for prevention. Rev Endocr Metab Disord 2020; 21:127-147. [PMID: 31792807 DOI: 10.1007/s11154-019-09521-z] [Citation(s) in RCA: 254] [Impact Index Per Article: 63.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Endocrine Disrupting Chemicals (EDCs) are a global problem for environmental and human health. They are defined as "an exogenous chemical, or mixture of chemicals, that can interfere with any aspect of hormone action". It is estimated that there are about 1000 chemicals with endocrine-acting properties. EDCs comprise pesticides, fungicides, industrial chemicals, plasticizers, nonylphenols, metals, pharmaceutical agents and phytoestrogens. Human exposure to EDCs mainly occurs by ingestion and to some extent by inhalation and dermal uptake. Most EDCs are lipophilic and bioaccumulate in the adipose tissue, thus they have a very long half-life in the body. It is difficult to assess the full impact of human exposure to EDCs because adverse effects develop latently and manifest at later ages, and in some people do not present. Timing of exposure is of importance. Developing fetus and neonates are the most vulnerable to endocrine disruption. EDCs may interfere with synthesis, action and metabolism of sex steroid hormones that in turn cause developmental and fertility problems, infertility and hormone-sensitive cancers in women and men. Some EDCs exert obesogenic effects that result in disturbance in energy homeostasis. Interference with hypothalamo-pituitary-thyroid and adrenal axes has also been reported. In this review, potential EDCs, their effects and mechanisms of action, epidemiological studies to analyze their effects on human health, bio-detection and chemical identification methods, difficulties in extrapolating experimental findings and studying endocrine disruptors in humans and recommendations for endocrinologists, individuals and policy makers will be discussed in view of the relevant literature.
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Affiliation(s)
- Bayram Yilmaz
- Department of Physiology, Faculty of Medicine, Yeditepe University, Istanbul, Turkey
| | - Hakan Terekeci
- Department of Internal Medicine, Faculty of Medicine, Yeditepe University, Istanbul, Turkey
| | - Suleyman Sandal
- Department of Physiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Fahrettin Kelestimur
- Department of Endocrinology, Faculty of Medicine, Yeditepe University, Istanbul, Turkey.
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12
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Kaikai NE, Ba-M'hamed S, Bennis M, Ghanima A. Prenatal exposure to the pesticide metam sodium induces sensorimotor and neurobehavioral abnormalities in mice offspring. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2020; 74:103309. [PMID: 31835201 DOI: 10.1016/j.etap.2019.103309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 11/22/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
The present study has investigated developmental neurotoxicity of Metam sodium (MS), from gestational day 6 and throughout the gestation period until delivery. Therefore, mated female mice were orally exposed on a daily basis to 0 (control), 50, 100 or 150 mg of MS/kg of body weight and their standard fertility and reproductive parameters were assessed. The offspring were examined for their sensorimotor development, depression and cognitive performance. Our results showed that MS exposure during pregnancy led to one case of mortality, two cases of abortion and disturbed fertility and reproductive parameters in pregnant dams. In offspring, MS induced an overall delay in innate reflexes and sensorimotor performances. Furthermore, all prenatally treated animals showed an increased level of depression-like behavior as well as a pronounced cognitive impairment in adulthood. These results demonstrated that prenatal exposure to MS causes a long-lasting developmental neurotoxicity and alters a wide range of behavioral functions in mice.
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Affiliation(s)
- Nour-Eddine Kaikai
- Laboratory of Pharmacology, Neurobiology and Behavior (URAC-37), Cadi Ayyad University, Marrakech, Morocco; Laboratory of Bioorganic and Macromolecular Chemistry. Cadi Ayyad University, Faculty of Sciences and Techniques, Marrakech, Morocco
| | - Saadia Ba-M'hamed
- Laboratory of Pharmacology, Neurobiology and Behavior (URAC-37), Cadi Ayyad University, Marrakech, Morocco
| | - Mohamed Bennis
- Laboratory of Pharmacology, Neurobiology and Behavior (URAC-37), Cadi Ayyad University, Marrakech, Morocco
| | - Abderrazzak Ghanima
- Laboratory of Bioorganic and Macromolecular Chemistry. Cadi Ayyad University, Faculty of Sciences and Techniques, Marrakech, Morocco.
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13
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Belcher SM, Cline JM, Conley J, Groeters S, Jefferson WN, Law M, Mackey E, Suen AA, Williams CJ, Dixon D, Wolf JC. Endocrine Disruption and Reproductive Pathology. Toxicol Pathol 2019; 47:1049-1071. [PMID: 31833458 PMCID: PMC8008741 DOI: 10.1177/0192623319879903] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
During the past 20 years, investigations involving endocrine active substances (EAS) and reproductive toxicity have dominated the landscape of ecotoxicological research. This has occurred in concert with heightened awareness in the scientific community, general public, and governmental entities of the potential consequences of chemical perturbation in humans and wildlife. The exponential growth of experimentation in this field is fueled by our expanding knowledge into the complex nature of endocrine systems and the intricacy of their interactions with xenobiotic agents. Complicating factors include the ever-increasing number of novel receptors and alternate mechanistic pathways that have come to light, effects of chemical mixtures in the environment versus those of single EAS laboratory exposures, the challenge of differentiating endocrine disruption from direct cytotoxicity, and the potential for transgenerational effects. Although initially concerned with EAS effects chiefly in the thyroid glands and reproductive organs, it is now recognized that anthropomorphic substances may also adversely affect the nervous and immune systems via hormonal mechanisms and play substantial roles in metabolic diseases, such as type 2 diabetes and obesity.
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Affiliation(s)
| | - J. Mark Cline
- Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | | | | | | | - Mac Law
- North Carolina State College of Veterinary Medicine, Raleigh, NC, USA
| | - Emily Mackey
- Michigan State University, East Lansing, MI, USA
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14
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Wittkowski P, Marx-Stoelting P, Violet N, Fetz V, Schwarz F, Oelgeschläger M, Schönfelder G, Vogl S. Caenorhabditis elegans As a Promising Alternative Model for Environmental Chemical Mixture Effect Assessment-A Comparative Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:12725-12733. [PMID: 31536708 DOI: 10.1021/acs.est.9b03266] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
A key challenge of mixture toxicity testing is that a multitude of substances with even more combinations need to be tested in a broad dose range. Consequently testing in rodent bioassays, the current gold standard of toxicity testing, is hardly feasible. High-throughput compatible cell culture systems, however, suffer from limitations with respect to toxicokinetics, tissue interactions, and compensatory mechanisms. Therefore, simple organisms like the nematode Caenorhabditis elegans, combining relevant advantages of complex in vivo and fast in vitro assays might prove highly valuable within a testing strategy for mixtures. To investigate the comparability between results obtained with C. elegans and traditional rodent assays, we used five azole fungicides as well investigated model substances. Our findings suggest that azoles act additively in C. elegans which is in line with previous results in rats. Additionally, we show that toxicokinetics are one important factor for the differences in the relative toxicity of the azoles in both species. Importantly, we also demonstrate that in contrast to most rodent in vivo studies, C. elegans assays provide well-defined concentration-response relationships which are a very good basis for the prediction of mixture effects. We conclude that C. elegans may be an appropriate model for mixture toxicity testing at least within a first step to identify and prioritize relevant mixtures for further testing.
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Affiliation(s)
- Paul Wittkowski
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
| | - Philip Marx-Stoelting
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
| | - Norman Violet
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
| | - Verena Fetz
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
| | - Franziska Schwarz
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
| | - Michael Oelgeschläger
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
| | - Gilbert Schönfelder
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin , Humboldt-Universität zu Berlin, and Berlin Institute of Health , 10117 Berlin , Germany
| | - Silvia Vogl
- German Federal Institute for Risk Assessment , German Centre for the Protection of Laboratory Animals (Bf3R) , 10589 Berlin , Germany
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15
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Conley JM, Lambright CS, Evans N, Cardon M, Furr J, Wilson VS, Gray LE. Mixed "Antiandrogenic" Chemicals at Low Individual Doses Produce Reproductive Tract Malformations in the Male Rat. Toxicol Sci 2019; 164:166-178. [PMID: 29945228 DOI: 10.1093/toxsci/kfy069] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Biomonitoring efforts have clearly shown that all humans are exposed to chemical mixtures. Of concern is whether or not exposure to mixtures during pregnancy contributes to congenital abnormalities in children even when each chemical is at an individual dose that does not affect the fetus. Here, we hypothesized that in utero exposure to a mixture of chemicals covering multiple "antiandrogenic" mechanisms of action at doses that individually have no adverse effect would result in permanent reproductive tract alterations in the male rat after birth. Pregnant dams were exposed to a range of dilutions (100%, 50%, 25%, 12.5%, 6.25%, or vehicle control) of a mixture containing pesticides, phthalates, and drugs (p, p'-DDE, linuron, prochloraz, procymidone, pyrifluquinazon, vinclozolin, finasteride, flutamide, simvastatin, and 9 phthalates [dipentyl, dicyclohexyl, di-2-ethylhexyl, dibutyl, benzyl butyl, diisobutyl, diisoheptyl, dihexyl, and diheptyl]). The top dose contained each chemical at 20% of its lowest observed adverse effect level (LOAEL) for the most sensitive male reproductive alteration following in utero exposure. We found that male rat offspring displayed a variety of neonatal, pubertal, and permanent adult effects across all dose levels. Even at the lowest dose (each chemical approximately 80-fold below lowest observed adverse effect level) there were permanent reductions in several reproductive tract tissue weights. In the top dose group, 100% of male offspring displayed permanent severe birth defects including genital malformations. Despite acting via 5 different molecular initiating events, a mixture of 18 chemicals can combine to produce additive effects even when each compound is at is at a relatively low dose.
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Affiliation(s)
- Justin M Conley
- National Health and Environmental Effects Research Laboratory, Toxicity Assessment Division, U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, North Carolina 27711
| | - Christy S Lambright
- National Health and Environmental Effects Research Laboratory, Toxicity Assessment Division, U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, North Carolina 27711
| | - Nicola Evans
- National Health and Environmental Effects Research Laboratory, Toxicity Assessment Division, U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, North Carolina 27711
| | - Mary Cardon
- National Health and Environmental Effects Research Laboratory, Toxicity Assessment Division, U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, North Carolina 27711
| | - Johnathan Furr
- National Health and Environmental Effects Research Laboratory, Toxicity Assessment Division, U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, North Carolina 27711.,Southern Research, Birmingham, Alabama 35205
| | - Vickie S Wilson
- National Health and Environmental Effects Research Laboratory, Toxicity Assessment Division, U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, North Carolina 27711
| | - Leon Earl Gray
- National Health and Environmental Effects Research Laboratory, Toxicity Assessment Division, U.S. Environmental Protection Agency, Office of Research and Development, Research Triangle Park, North Carolina 27711
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16
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Taverna ME, Busatto CA, Lescano MR, Nicolau VV, Zalazar CS, Meira GR, Estenoz DA. Microparticles based on ionic and organosolv lignins for the controlled release of atrazine. JOURNAL OF HAZARDOUS MATERIALS 2018; 359:139-147. [PMID: 30014909 DOI: 10.1016/j.jhazmat.2018.07.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 06/29/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
Lignins are natural polymers of the lignocellulosic biomass. Nowadays, there is a growing interest in developing value-added products based on lignins due to their renewability, low cost and abundance. In this work, lignin microspheres from organosolv and ionic isolation processes were prepared for the controlled release of atrazine. Microspheres were prepared by the solvent extraction/evaporation technique. The controlled release of atrazine from organosolv and ionic lignins microparticles was studied in water. Mobility experiments were performed in an agricultural soil from Argentina. The results showed that microparticles prepared using dichloromethane as the dispersed phase were spherical, while lignins dispersed in ethyl acetate produce irregular microparticles. Organosolv lignin microparticles presented higher encapsulation efficiency for all herbicide loads. About 98% and 95% of atrazine was released in 24 and 48 h approximately from organosolv and ionic lignin microparticles, respectively. The release profiles of atrazine from both lignin microparticles were not affected by the herbicide load. Atrazine mobility experiments in soil showed that about 80% of free atrazine was leached in 37 days, while 65.0% and 59.7% of the herbicide was leached from ionic and organosolv lignin microparticles, respectively. Thus, atrazine-loaded microparticles could reduce leaching compared to a commercial formulation of free atrazine.
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Affiliation(s)
- María Eugenia Taverna
- INTEC (UNL-CONICET), Güemes 3450, (3000) Santa Fe, Argentina; UTN Regional San Francisco, Av. de la Universidad 501, (2400) San Francisco, Córdoba, Argentina
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17
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Sabarwal A, Kumar K, Singh RP. Hazardous effects of chemical pesticides on human health-Cancer and other associated disorders. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 63:103-114. [PMID: 30199797 DOI: 10.1016/j.etap.2018.08.018] [Citation(s) in RCA: 234] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 07/21/2018] [Accepted: 08/27/2018] [Indexed: 05/27/2023]
Abstract
Poisoning from pesticides is a global public health problem and accounts for nearly 300,000 deaths worldwide every year. Exposure to pesticides is inevitable; there are different modes through which humans get exposed to pesticides. The mode of exposure is an important factor as it also signifies the concentration of pesticides exposure. Pesticides are used extensively in agricultural and domestic settings. These chemicals are believed to cause many disorders in humans and wildlife. Research from past few decades has tried to answer the associated mechanism of action of pesticides in conjunction with their harmful effects. This perspective considers the past and present research in the field of pesticides and associated disorders. We have reviewed the most common diseases including cancer which are associated with pesticides. Pesticides have shown to be involved in the pathogenesis of Parkinson's and Alzheimer's diseases as well as various disorders of the respiratory and reproductive tracts. Oxidative stress caused by pesticides is an important mechanism through which many of the pesticides exert their harmful effects. Oxidative stress is known to cause DNA damage which in turn may cause malignancies and other disorders. Many pesticides have shown to modulate the gene expression at the level of non-coding RNAs, histone deacetylases, DNA methylation patterns suggesting their role in epigenetics.
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Affiliation(s)
- Akash Sabarwal
- School of Life Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India; Cancer Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Kunal Kumar
- School of Life Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India
| | - Rana P Singh
- School of Life Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India; Cancer Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India.
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18
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Toppari J, Rodprasert W, Koskenniemi JJ. Exposure Variation and Endocrine Disruption of the Male Reproductive System. Horm Res Paediatr 2018; 86:247-252. [PMID: 27255653 DOI: 10.1159/000446436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/26/2016] [Indexed: 11/19/2022] Open
Abstract
Exposure to endocrine disruptors varies geographically and temporally. Environmental levels of persistent organic pollutants have decreased after international regulation, whereas potential exposure to thousands of new chemicals has increased. The adverse effects of endocrine disruptors depend on susceptibility and timing of the exposure. Fetal and childhood exposures are often most harmful because of organizational and programming effects. In this review, we use the exposure to persistent organic pollutants such as polybrominated diphenyl ethers, dioxins and dioxin-like polychlorinated biphenyls and differences in the incidence of reproductive disorders between Denmark and Finland as an example to highlight how exposure variation and variation in genetic susceptibility may influence the strength of the association between the exposure to endocrine disruptors and adverse effects. Understanding the causes and implications of interindividual differences in susceptibility to endocrine disruptors is crucial for the protection of normal development.
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Affiliation(s)
- Jorma Toppari
- Department of Physiology, Institute of Biomedicine, University of Turku, Turku, Finland
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19
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Mantovani A. Endocrine Disrupters and the Safety of Food Chains. Horm Res Paediatr 2018; 86:279-288. [PMID: 26535888 DOI: 10.1159/000441496] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 09/23/2015] [Indexed: 11/19/2022] Open
Abstract
Endocrine disrupters (ED) are a heterogeneous group of chemicals including persistent contaminants, pesticides, as well as compounds present in consumer products and natural substances. For most ED, the food chain is a current major exposure route for the general population. ED can enter the food chain through the living environment (e.g., feeds, fertilizers) of food-producing organisms, be directly employed in food production (e.g., pesticides) or be released from food contact materials (such as bisphenol A or phthalates); in addition, the endocrine disruption potential of some natural compounds in edible plants, including the so-called phytoestrogens, should not be overlooked. An exposure assessment has to consider the specific liability of food commodities to contamination with specific ED (e.g., polychlorinated and polybrominated chemicals in lipid-rich foods). The paper discusses the main toxicological research issues in order to support the risk assessment of ED in food chains, including: the potential for additive, 'cocktail' effects (as from multiple pesticide residues); the long-term effects on target body systems (e.g., reproductive, nervous) elicited by exposure during prenatal as well as postnatal life stage windows, and toxicant/nutrient interactions (e.g., thyroid-targeting ED and iodine status). Food safety systems should exploit the available knowledge to improve prevention of long-term risks along the whole food chain.
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Affiliation(s)
- Alberto Mantovani
- Food and Veterinary Toxicology Unit, Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, Rome, Italy
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20
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Yamamoto FY, Garcia JRE, Kupsco A, Oliveira Ribeiro CA. Vitellogenin levels and others biomarkers show evidences of endocrine disruption in fish species from Iguaçu River - Southern Brazil. CHEMOSPHERE 2017; 186:88-99. [PMID: 28772185 DOI: 10.1016/j.chemosphere.2017.07.111] [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: 03/30/2017] [Revised: 07/19/2017] [Accepted: 07/20/2017] [Indexed: 06/07/2023]
Abstract
The adverse effects of endocrine disrupting chemicals (EDCs) on aquatic wildlife and human health represent a current issue of high public concern. Even so, they are still poorly studied in aquatic environments of South America. The aim of the present study was to investigate the impact of EDCs in five cascading reservoirs from the Iguaçu River, evaluating reproductive endpoints in three native fish species (Astyanax bifasciatus, Chrenicicla iguassuensis and Geophagus brasiliensis). Additionally, a polyclonal antiserum anti-vitellogenin from G. brasiliensis and a capture ELISA assay were developed for detection of estrogenic or anti-estrogenic activities in male and female fish, respectively. Vitellogenin (VTG) levels in male fish from the Iguacu River was observed, as well as decreased levels of vitellogenin and estradiol in the plasma of female fish. These findings were associated with immature gonads and lower gonadosomatic index in G. brasiliensis adult females from the Foz do Areia (FA) Reservoir. Additionally, both endemic species (Astyanax bifasciatus and Chrenicicla iguassuensis) displayed immature gonads and histological changes, such as degeneration of germ cells, in other studied reservoirs. The current results suggest that these reproductive responses may be associated with the bioavailability of EDCs in the Iguaçu River. These impacts are likely related to chemicals released by human activities, especially from sewage and industrial sources and agricultural production, detected in previous studies. Overall, the FA reservoir was potentially the most affected by chemicals with endocrine properties, and further studies are necessary to identify and quantify these chemicals.
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Affiliation(s)
- F Y Yamamoto
- Department of Cell Biology, Federal University of Paraná, Curitiba, Brazil.
| | | | - A Kupsco
- Department of Environmental Sciences, University of California Riverside, Riverside, United States
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21
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Declerck K, Remy S, Wohlfahrt-Veje C, Main KM, Van Camp G, Schoeters G, Vanden Berghe W, Andersen HR. Interaction between prenatal pesticide exposure and a common polymorphism in the PON1 gene on DNA methylation in genes associated with cardio-metabolic disease risk-an exploratory study. Clin Epigenetics 2017; 9:35. [PMID: 28396702 PMCID: PMC5382380 DOI: 10.1186/s13148-017-0336-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 03/30/2017] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Prenatal environmental conditions may influence disease risk in later life. We previously found a gene-environment interaction between the paraoxonase 1 (PON1) Q192R genotype and prenatal pesticide exposure leading to an adverse cardio-metabolic risk profile at school age. However, the molecular mechanisms involved have not yet been resolved. It was hypothesized that epigenetics might be involved. The aim of the present study was therefore to investigate whether DNA methylation patterns in blood cells were related to prenatal pesticide exposure level, PON1 Q192R genotype, and associated metabolic effects observed in the children. METHODS Whole blood DNA methylation patterns in 48 children (6-11 years of age), whose mothers were occupationally unexposed or exposed to pesticides early in pregnancy, were determined by Illumina 450 K methylation arrays. RESULTS A specific methylation profile was observed in prenatally pesticide exposed children carrying the PON1 192R-allele. Differentially methylated genes were enriched in several neuroendocrine signaling pathways including dopamine-DARPP32 feedback (appetite, reward pathways), corticotrophin releasing hormone signaling, nNOS, neuregulin signaling, mTOR signaling, and type II diabetes mellitus signaling. Furthermore, we were able to identify possible candidate genes which mediated the associations between pesticide exposure and increased leptin level, body fat percentage, and difference in BMI Z score between birth and school age. CONCLUSIONS DNA methylation may be an underlying mechanism explaining an adverse cardio-metabolic health profile in children carrying the PON1 192R-allele and prenatally exposed to pesticides.
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Affiliation(s)
- Ken Declerck
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, Antwerp, Belgium
| | - Sylvie Remy
- Department of Epidemiology and Social Medicine, Antwerp University, Universiteitsplein 1, Antwerp, Belgium.,Flemish Institute for Technological Research (VITO), Unit Environmental Risk and Health, Boeretang 200, Mol, Belgium
| | - Christine Wohlfahrt-Veje
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Katharina M Main
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Guy Van Camp
- Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Greet Schoeters
- Flemish Institute for Technological Research (VITO), Unit Environmental Risk and Health, Boeretang 200, Mol, Belgium.,Department of Biomedical Sciences, Antwerp University, Universiteitsplein 1, Antwerp, Belgium.,Environmental Medicine, Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - Wim Vanden Berghe
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, Antwerp, Belgium
| | - Helle R Andersen
- Environmental Medicine, Institute of Public Health, University of Southern Denmark, Odense, Denmark
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Runkle J, Flocks J, Economos J, Dunlop AL. A systematic review of Mancozeb as a reproductive and developmental hazard. ENVIRONMENT INTERNATIONAL 2017; 99:29-42. [PMID: 27887783 DOI: 10.1016/j.envint.2016.11.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 11/03/2016] [Accepted: 11/03/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND The potential adverse reproductive and developmental effects of Mancozeb, especially in sensitive subpopulations, have not been fully reviewed for this widely used fungicide. OBJECTIVE To review the experimental and epidemiologic evidence for the association between exposure to Mancozeb and reproductive and developmental health outcomes using an adaptation of the National Toxicology Program's Office of Health Assessment and Translation (OHAT) systematic review framework. DATA SOURCES Four databases (PubMed, TOXNET, Web of Science, Google Scholar) were searched for published studies on Mancozeb. Of 403 identified articles, 30 met our inclusion criteria for systematic review. RESULTS Results from in vitro studies provide evidence that Mancozeb may indirectly disrupt or impair reproduction at the cellular level and should be regarded as a reproductive toxicant. Animal studies confirm reproductive and developmental toxicity in mammals and suggest that males chronically exposed to Mancozeb experience significant changes in physiological, biochemical, and pathological processes that may lead to infertility. Epidemiological studies were limited to indirect methods of exposure assessment and examined the effect of fungicides more broadly during pre-conception, pregnancy, and birth, yielding mixed results. CONCLUSIONS High confidence ratings from in vitro and animal studies, in combination with moderate confidence ratings from epidemiologic studies employing indirect methods of exposure assessment, provide evidence that Mancozeb should be regarded as a suspected developmental hazard and a presumed reproductive hazard in humans. More population-based studies linking direct measures and/or biomarkers of exposure to adverse effects on male and female fertility, as well as in utero and early life development, are needed to improve the quality of the evidence base concerning the human reproductive and developmental consequences of Mancozeb exposure.
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Affiliation(s)
- Jennifer Runkle
- Cooperative Institute for Climate and Satellites-North Carolina, North Carolina State University, Asheville, NC, USA; Nell Hodgson Woodruff School of Nursing, Emory University, Atlanta, GA, USA.
| | - Joan Flocks
- Center for Governmental Responsibility, Levin College of Law, University of Florida, Gainesville, FL, USA
| | | | - Anne L Dunlop
- Nell Hodgson Woodruff School of Nursing, Emory University, Atlanta, GA, USA
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Falleiros-Júnior LR, Perez APS, Taboga SR, Dos Santos FCA, Vilamaior PSL. Neonatal exposure to ethinylestradiol increases ventral prostate growth and promotes epithelial hyperplasia and inflammation in adult male gerbils. Int J Exp Pathol 2016; 97:380-388. [PMID: 27917613 DOI: 10.1111/iep.12208] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 08/17/2016] [Indexed: 12/14/2022] Open
Abstract
The aim of this study was to analyse morphologically the ventral prostate of adult Mongolian gerbils exposed to ethinylestradiol (EE) during the first week of postnatal development. Lactating females received daily, by gavage, doses of 10 μg/kg of EE diluted in 100 μl of mineral oil from the 1st to 10th postnatal day of the pups (EE group). In the control group (C), the lactating females received only the vehicle. Upon completing 120 days of age, the male offspring were euthanized and the prostates collected for analyses. We employed morphological, stereological-morphometrical, immunohistochemical and ultrastructural methods. The results showed that the postnatal exposure to EE doubled the prostatic complex weight, increasing the epithelial and stromal compartments, in addition to the secretory activity of the ventral lobe of the prostate. All glands exposed to EE showed strong stromal remodelling, and some foci of epithelial hyperplasia and inflammatory infiltrate in both luminal and epithelial or stromal compartments. Cells positive for anti-AR and anti-PCNA reactions increased into the epithelial and stromal tissues. ERα-positive cells, which are normally found in the stromal compartment of intact prostates, were frequently observed in the prostatic epithelium of treated animals. This study demonstrated that the exposure to EE during postnatal development causes histophysiological alterations in this gland, predisposing to the development of prostatic lesions during life. These results are important for public health, considering that women worldwide have commonly used EE. Moreover, the bioaccumulation of this chemical has increased in different ecosystems.
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Affiliation(s)
- Luiz R Falleiros-Júnior
- Programa de Pós-graduação em Ciências da Saúde, Faculdade de Medicina de Rio Preto, São José do Rio Preto, São Paulo, Brazil.,Department of Biology, Laboratory of Microscopy and Microanalysis, University Estadual Paulista - UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Ana P S Perez
- Department of Structural and Functional Biology, Campinas State University - UNICAMP, Campinas, São Paulo, Brazil
| | - Sebastião R Taboga
- Department of Biology, Laboratory of Microscopy and Microanalysis, University Estadual Paulista - UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Fernanda C A Dos Santos
- Department of Histology, Embryology and Cell Biology, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Patrícia S L Vilamaior
- Programa de Pós-graduação em Ciências da Saúde, Faculdade de Medicina de Rio Preto, São José do Rio Preto, São Paulo, Brazil.,Department of Biology, Laboratory of Microscopy and Microanalysis, University Estadual Paulista - UNESP, São José do Rio Preto, São Paulo, Brazil
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Combined effects of nonylphenol and bisphenol a on the human prostate epithelial cell line RWPE-1. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:4141-55. [PMID: 25874684 PMCID: PMC4410238 DOI: 10.3390/ijerph120404141] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 04/02/2015] [Accepted: 04/07/2015] [Indexed: 01/21/2023]
Abstract
The xenoestrogens nonylphenol (NP) and bisphenol A (BPA) are regarded as endocrine disrupting chemicals (EDCs) which have widespread occurrence in our daily life. In the present study, the purpose was to analyze the combined effects of NP and BPA on the human prostate epithelial cell line RWPE-1 using two mathematical models based on the Loewe additivity (LA) theory and the Bliss independence (BI) theory. RWPE-1 cells were treated with NP (0.01-100 µM) and BPA (1-5000 µM) in either a single or a combined format. A cell viability assay and lactate dehydrogenase (LDH) leakage rate assay were employed as endpoints. As predicted by the two models and based on the cell viability assay, significant synergism between NP and BPA were observed. However, based on the LDH assay, the trends were reversed. Given that environmental contaminants are frequently encountered simultaneously, these data indicated that there were potential interactions between NP and BPA, and the combined effects of the chemical mixture might be stronger than the additive values of individual chemicals combined, which should be taken into consideration for the risk assessment of EDCs.
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25
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Sanabria M, Pessin A, Zanutto MR, Perobelli JE, Guerra MT, Banzato TP, Borges CDS, Kempinas WDG. Absence of effects on the rat sperm quality after subacute exposure to low doses of fungicide prochloraz. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2015; 78:481-491. [PMID: 25849765 DOI: 10.1080/15287394.2015.1010463] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Prochloraz (PCZ) is a fungicide and androgen-receptor antagonist used worldwide in horticulture and agriculture. Pre- and perinatal exposure to this pesticide during sexual differentiation is deleterious for male offspring. Since data on the effects of PCZ on epididymal functions are scarce, and because sperm maturation occurs in this organ, the present investigation aimed to determine whether low PCZ doses administered to rats during the phase of sperm transit through the epididymis might affect the morphophysiology of this organ and sperm quality. Adult male Wistar rats were assigned to 4 different groups: 0 (control, vehicle) or 10, 15, or 30 mg/kg bw/d PCZ diluted in corn oil administered orally for 4 consecutive days. Morphofunctional parameters of the male reproductive tract, hormone concentrations, sperm evaluations, and fertility and histopathologic analysis of testis and epididymis were assessed. There were no statistically significant differences between treated and control groups in relation to all evaluated parameters. Data demonstrated show that PCZ exposure for a brief 4-d exposure and low doses did not produce reproductive toxicity or compromise sperm quality in adult rats.
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Affiliation(s)
- Marciana Sanabria
- a Laboratory of Reproductive and Developmental Biology and Toxicology, Department of Morphology , Institute of Biosciences, UNESP-Universidade Estadual Paulista , Botucatu , São Paulo , Brazil
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26
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Ramirez T, Buechse A, Dammann M, Melching-Kollmuß S, Woitkowiak C, van Ravenzwaay B. Effect of estrogenic binary mixtures in the yeast estrogen screen (YES). Regul Toxicol Pharmacol 2014; 70:286-96. [DOI: 10.1016/j.yrtph.2014.07.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/31/2014] [Accepted: 07/06/2014] [Indexed: 11/26/2022]
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Rieke S, Koehn S, Hirsch-Ernst K, Pfeil R, Kneuer C, Marx-Stoelting P. Combination effects of (tri)azole fungicides on hormone production and xenobiotic metabolism in a human placental cell line. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:9660-79. [PMID: 25233012 PMCID: PMC4199042 DOI: 10.3390/ijerph110909660] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 08/22/2014] [Accepted: 09/01/2014] [Indexed: 11/26/2022]
Abstract
Consumers are exposed to multiple residues of different pesticides via the diet. Therefore, EU legislation for pesticides requires the evaluation of single active substances as well as the consideration of combination effects. Hence the analysis of combined effects of substances in a broad dose range represents a key challenge to current experimental and regulatory toxicology. Here we report evidence for additive effects for (tri)azole fungicides, a widely used group of antifungal agents, in the human placental cell line Jeg-3. In addition to the triazoles cyproconazole, epoxiconazole, flusilazole and tebuconazole and the azole fungicide prochloraz also pesticides from other chemical classes assumed to act via different modes of action (i.e., the organophosphate chlorpyrifos and the triazinylsulfonylurea herbicide triflusulfuron-methyl) were investigated. Endpoints analysed include synthesis of steroid hormone production (progesterone and estradiol) and gene expression of steroidogenic and non-steroidogenic cytochrome-P-450 (CYP) enzymes. For the triazoles and prochloraz, a dose dependent inhibition of progesterone production was observed and additive effects could be confirmed for several combinations of these substances in vitro. The non-triazoles chlorpyrifos and triflusulfuron-methyl did not affect this endpoint and, in line with this finding, no additivity was observed when these substances were applied in mixtures with prochloraz. While prochloraz slightly increased aromatase expression and estradiol production and triflusulfuron-methyl decreased estradiol production, none of the other substances had effects on the expression levels of steroidogenic CYP-enzymes in Jeg-3 cells. For some triazoles, prochloraz and chlorpyrifos a significant induction of CYP1A1 mRNA expression and potential combination effects for this endpoint were observed. Inhibition of CYP1A1 mRNA induction by the AhR inhibitor CH223191 indicated AhR receptor dependence this effect.
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Affiliation(s)
- Svenja Rieke
- Federal Institute for Risk Assessment (BfR), Max-Dohrn-Str 8-10, 10589 Berlin, Germany.
| | - Sophie Koehn
- Federal Institute for Risk Assessment (BfR), Max-Dohrn-Str 8-10, 10589 Berlin, Germany.
| | - Karen Hirsch-Ernst
- Federal Institute for Risk Assessment (BfR), Max-Dohrn-Str 8-10, 10589 Berlin, Germany.
| | - Rudolf Pfeil
- Federal Institute for Risk Assessment (BfR), Max-Dohrn-Str 8-10, 10589 Berlin, Germany.
| | - Carsten Kneuer
- Federal Institute for Risk Assessment (BfR), Max-Dohrn-Str 8-10, 10589 Berlin, Germany.
| | - Philip Marx-Stoelting
- Federal Institute for Risk Assessment (BfR), Max-Dohrn-Str 8-10, 10589 Berlin, Germany.
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Miller-Rhodes P, Popescu M, Goeke C, Tirabassi T, Johnson L, Markowski VP. Prenatal exposure to the brominated flame retardant hexabromocyclododecane (HBCD) impairs measures of sustained attention and increases age-related morbidity in the Long-Evans rat. Neurotoxicol Teratol 2014; 45:34-43. [PMID: 24995466 DOI: 10.1016/j.ntt.2014.06.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 06/18/2014] [Accepted: 06/24/2014] [Indexed: 01/18/2023]
Abstract
Hexabromocyclododecane (HBCD) is a brominated flame retardant that is widely-used in foam building materials and to a lesser extent, furniture and electronic equipment. After decades of use, HBCD and its metabolites have become globally-distributed environmental contaminants that can be measured in the atmosphere, water bodies, wildlife, food staples and human breastmilk. Emerging evidence suggests that HBCD can affect early brain development and produce behavioral consequences for exposed organisms. The current study examined some of the developmental and lifelong neurobehavioral effects of prenatal HBCD exposure in a rat model. Pregnant rats were gavaged with 0, 3, 10, or 30mg/kg HBCD from gestation day 1 to parturition. A functional observation battery was used to assess sensorimotor behaviors in neonates. Locomotor and operant responding under random ratio and Go/no-go schedules of food reinforcement were examined in cohorts of young adult and aged rats. HBCD exposure was associated with increased reactivity to a tailpinch in neonates, decreased forelimb grip strength in juveniles, and impaired sustained attention indicated by Go/no-go responding in aged rats. In addition, HBCD exposure was associated with a significant increase in morbidity in the aged cohort. One health complication, a progressive loss of hindleg function, was observed only in the aged, 3mg/kg HBCD animals. These effects suggest that HBCD is a developmental neurotoxicant that can produce long-term behavioral impairments that emerge at different points in the lifespan following prenatal exposure.
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Affiliation(s)
- Patrick Miller-Rhodes
- Department of Psychology, State University of New York at Geneseo, Geneseo, NY, 14454, United States
| | - Maria Popescu
- Department of Psychology, University of Southern Maine, Portland, ME, 04104, United States
| | - Calla Goeke
- Department of Psychology, State University of New York at Geneseo, Geneseo, NY, 14454, United States
| | - Toni Tirabassi
- Department of Psychology, University of Southern Maine, Portland, ME, 04104, United States
| | - Lauren Johnson
- Department of Psychology, State University of New York at Geneseo, Geneseo, NY, 14454, United States
| | - Vincent P Markowski
- Department of Psychology, State University of New York at Geneseo, Geneseo, NY, 14454, United States
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Ma D, Chen L, Zhu X, Li F, Liu C, Liu R. Assessment of combined antiandrogenic effects of binary parabens mixtures in a yeast-based reporter assay. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:6482-6494. [PMID: 24469767 DOI: 10.1007/s11356-014-2497-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 12/26/2013] [Indexed: 06/03/2023]
Abstract
To date, toxicological studies of endocrine disrupting chemicals (EDCs) have typically focused on single chemical exposures and associated effects. However, exposure to EDCs mixtures in the environment is common. Antiandrogens represent a group of EDCs, which draw increasing attention due to their resultant demasculinization and sexual disruption of aquatic organisms. Although there are a number of in vivo and in vitro studies investigating the combined effects of antiandrogen mixtures, these studies are mainly on selected model compounds such as flutamide, procymidone, and vinclozolin. The aim of the present study is to investigate the combined antiandrogenic effects of parabens, which are widely used antiandrogens in industrial and domestic commodities. A yeast-based human androgen receptor (hAR) assay (YAS) was applied to assess the antiandrogenic activities of n-propylparaben (nPrP), iso-propylparaben (iPrP), methylparaben (MeP), and 4-n-pentylphenol (PeP), as well as the binary mixtures of nPrP with each of the other three antiandrogens. All of the four compounds could exhibit antiandrogenic activity via the hAR. A linear interaction model was applied to quantitatively analyze the interaction between nPrP and each of the other three antiandrogens. The isoboles method was modified to show the variation of combined effects as the concentrations of mixed antiandrogens were changed. Graphs were constructed to show isoeffective curves of three binary mixtures based on the fitted linear interaction model and to evaluate the interaction of the mixed antiandrogens (synergism or antagonism). The combined effect of equimolar combinations of the three mixtures was also considered with the nonlinear isoboles method. The main effect parameters and interaction effect parameters in the linear interaction models of the three mixtures were different from zero. The results showed that any two antiandrogens in their binary mixtures tended to exert equal antiandrogenic activity in the linear concentration ranges. The antiandrogenicity of the binary mixture and the concentration of nPrP were fitted to a sigmoidal model if the concentrations of the other antiandrogens (iPrP, MeP, and PeP) in the mixture were lower than the AR saturation concentrations. Some concave isoboles above the additivity line appeared in all the three mixtures. There were some synergistic effects of the binary mixture of nPrP and MeP at low concentrations in the linear concentration ranges. Interesting, when the antiandrogens concentrations approached the saturation, the interaction between chemicals were antagonistic for all the three mixtures tested. When the toxicity of the three mixtures was assessed using nonlinear isoboles, only antagonism was observed for equimolar combinations of nPrP and iPrP as the concentrations were increased from the no-observed-effect-concentration (NOEC) to effective concentration of 80%. In addition, the interactions were changed from synergistic to antagonistic as effective concentrations were increased in the equimolar combinations of nPrP and MeP, as well as nPrP and PeP. The combined effects of three binary antiandrogens mixtures in the linear ranges were successfully evaluated by curve fitting and isoboles. The combined effects of specific binary mixtures varied depending on the concentrations of the chemicals in the mixtures. At low concentrations in the linear concentration ranges, there was synergistic interaction existing in the binary mixture of nPrP and MeP. The interaction tended to be antagonistic as the antiandrogens approached saturation concentrations in mixtures of nPrP with each of the other three antiandrogens. The synergistic interaction was also found in the equimolar combinations of nPrP and MeP, as well as nPrP and PeP, at low concentrations with another method of nonlinear isoboles. The mixture activities of binary antiandrogens had a tendency towards antagonism at high concentrations and synergism at low concentrations.
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Affiliation(s)
- Dehua Ma
- School of Environment, Tsinghua University, Beijing, 100084, China
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Toppari J, Rodprasert W, Virtanen HE. Cryptorchidism --disease or symptom? ANNALES D'ENDOCRINOLOGIE 2014; 75:72-6. [PMID: 24786701 DOI: 10.1016/j.ando.2014.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Testes descend to the scrotum normally before birth. When they fail to do so, the boy is cryptorchid and has an increased risk for testicular germ cell cancer and subfertility later in life. Early correction of maldescent by orchiopexy operation improves the spermatogenetic capacity of the testis but does not return the testicular cancer risk to the control level. Testicular descent is regulated by testis-derived hormones testosterone and insulin-like peptide 3. Cryptorchidism can therefore be considered a symptom of impaired testicular function that may also be linked to other testicular diseases, such as germ cell cancer and subfertility. Early orchiopexy can alleviate the effects of cryptorchidism on spermatogenesis, but alertness for testicular cancer should be maintained. In searching the genetic and environmental reasons for these diseases, it is useful to consider their connection with each other.
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Affiliation(s)
- Jorma Toppari
- Departments of physiology and pediatrics, University of Turku, Turku, Findland.
| | - Wiwat Rodprasert
- Departments of physiology and pediatrics, University of Turku, Turku, Findland
| | - Helena E Virtanen
- Departments of physiology and pediatrics, University of Turku, Turku, Findland
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Environmental pollutants and lifestyle factors induce oxidative stress and poor prenatal development. Reprod Biomed Online 2014; 29:17-31. [PMID: 24813750 DOI: 10.1016/j.rbmo.2014.03.002] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 12/13/2013] [Accepted: 03/06/2014] [Indexed: 01/20/2023]
Abstract
Developmental toxicity caused by exposure to a mixture of environmental pollutants has become a major health concern. Human-made chemicals, including xenoestrogens, pesticides and heavy metals, as well as unhealthy lifestyle behaviours, mainly tobacco smoking, alcohol consumption and medical drug abuse, are major factors that adversely influence prenatal development and increase susceptibility of offspring to diseases. There is evidence to suggest that the developmental toxicological mechanisms of chemicals and lifestyle factors involve the generation of reactive oxygen species (ROS) and cellular oxidative damage. Overproduction of ROS induces oxidative stress, a state where increased ROS generation overwhelms antioxidant protection and subsequently leads to oxidative damage of cellular macromolecules. Data on the involvement of oxidative stress in the mechanism of developmental toxicity following exposure to environmental pollutants are reviewed in an attempt to provide an updated basis for future studies on the toxic effect of such pollutants, particularly the notion of increased risk for developmental toxicity due to combined and cumulative exposure to various environmental pollutants. The aims of such studies are to better understand the mechanisms by which environmental pollutants adversely affect conceptus development and to elucidate the impact of cumulative exposures to multiple pollutants on post-natal development and health outcomes. Developmental toxicity caused by exposure to mixture of environmental pollutants has become a major health concern. Human-made chemicals, including xenoestrogens, pesticides and heavy metals, as well as unhealthy lifestyle behaviors, mainly tobacco smoking, alcohol consumption and medical drug abuse, are major factors that adversely influence prenatal development and increase the susceptibility of offspring to development complications and diseases. There is evidence to suggest that the developmental toxicological mechanisms of human-made chemicals and unhealthy lifestyle factors involve the generation of reactive oxygen species (ROS) and cellular oxidative damage. Overproduction of ROS induces oxidative stress, a state where increased generation of ROS overwhelms antioxidant protection and subsequently leads to oxidative damage of cellular macromolecules. Exposure to various environmental pollutants induces synergic and cumulative dose-additive adverse effects on prenatal development, pregnancy outcomes and neonate health. Data from the literature on the involvement of oxidative stress in the mechanism of developmental toxicity following in vivo exposure to environmental pollutants will be reviewed in an attempt to provide an updated basis for future studies on the toxic effect of such pollutants, particularly the notion of increased risk for developmental toxicity due to combined and cumulative exposure to various environmental pollutants. The aims of such studies are to better understand the mechanisms by which environmental pollutants adversely affect conceptus development and to elucidate the impact of cumulative exposures to multiple pollutants on postnatal development and health outcomes.
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Effects of perinatal ethinyl estradiol exposure in male and female Wistar rats. Reprod Toxicol 2013; 42:180-91. [DOI: 10.1016/j.reprotox.2013.09.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 07/08/2013] [Accepted: 09/04/2013] [Indexed: 11/23/2022]
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33
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Scientific Opinion on the relevance of dissimilar mode of action and its appropriate application for cumulative risk assessment of pesticides residues in food. EFSA J 2013. [DOI: 10.2903/j.efsa.2013.3472] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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34
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International Frameworks Dealing with Human Risk Assessment of Combined Exposure to Multiple Chemicals. EFSA J 2013. [DOI: 10.2903/j.efsa.2013.3313] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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35
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Overgaard A, Holst K, Mandrup KR, Boberg J, Christiansen S, Jacobsen PR, Hass U, Mikkelsen JD. The effect of perinatal exposure to ethinyl oestradiol or a mixture of endocrine disrupting pesticides on kisspeptin neurons in the rat hypothalamus. Neurotoxicology 2013; 37:154-62. [DOI: 10.1016/j.neuro.2013.04.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 03/01/2013] [Accepted: 04/24/2013] [Indexed: 01/21/2023]
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36
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Blocker TD, Ophir AG. Cryptic confounding compounds: A brief consideration of the influences of anthropogenic contaminants on courtship and mating behavior. Acta Ethol 2013; 16:10.1007/s10211-012-0137-x. [PMID: 24244068 PMCID: PMC3827776 DOI: 10.1007/s10211-012-0137-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Contaminants, like pesticides, polychlorinated biphenyls (PCBs), dioxins and metals, are persistent and ubiquitous and are known to threaten the environment. Traditionally, scientists have considered the direct physiological risks that these contaminants pose. However, scientists have just begun to integrate ethology and toxicology to investigate the effects that contaminants have on behavior. This review considers the potential for contaminant effects on mating behavior. Here we assess the growing body of research concerning disruptions in sexual differentiation, courtship, sexual receptivity, arousal, and mating. We discuss the implications of these disruptions on conservation efforts and highlight the importance of recognizing the potential for environmental stressors to affect behavioral experimentation. More specifically, we consider the negative implications for anthropogenic contaminants to affect the immediate behavior of animals, and their potential to have cascading and/or long-term effects on the behavioral ecology and evolution of populations. Overall, we aim to raise awareness of the confounding influence that contaminants can have, and promote caution when interpreting results where the potential for cryptic affects are possible.
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Affiliation(s)
- Tomica D Blocker
- Department of Zoology, Oklahoma State University, Stillwater, OK 74078
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37
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Jensen BH, Petersen A, Christiansen S, Boberg J, Axelstad M, Herrmann SS, Poulsen ME, Hass U. Probabilistic assessment of the cumulative dietary exposure of the population of Denmark to endocrine disrupting pesticides. Food Chem Toxicol 2013; 55:113-20. [DOI: 10.1016/j.fct.2013.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/19/2012] [Accepted: 01/03/2013] [Indexed: 11/30/2022]
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Uzumcu M, Zama AM, Oruc E. Epigenetic mechanisms in the actions of endocrine-disrupting chemicals: gonadal effects and role in female reproduction. Reprod Domest Anim 2013; 47 Suppl 4:338-47. [PMID: 22827390 DOI: 10.1111/j.1439-0531.2012.02096.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
There is a heightened interest and concern among scientists, clinicians and regulatory agencies as well as the general public, regarding the effects of environmental endocrine-disrupting chemicals (EDCs). In this review, we identify the main epigenetic mechanisms and describe key ovarian processes that are vulnerable to the epigenetic actions of EDCs. We also provide an overview of the human epidemiological evidence documenting the detrimental effects of several common environmental EDCs on female reproduction. We then focus on experimental evidence demonstrating the epigenetic effects of these EDCs in the ovary and female reproductive system, with an emphasis on methoxychlor, an organochlorine pesticide. We conclude the review by describing several critical issues in studying epigenetic effects of EDCs in the ovary, including transgenerational epigenetic effects.
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Affiliation(s)
- M Uzumcu
- Department of Animal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901-8525, USA.
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Wickerham EL, Lozoff B, Shao J, Kaciroti N, Xia Y, Meeker JD. Reduced birth weight in relation to pesticide mixtures detected in cord blood of full-term infants. ENVIRONMENT INTERNATIONAL 2012; 47:80-5. [PMID: 22796478 PMCID: PMC3410737 DOI: 10.1016/j.envint.2012.06.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 06/14/2012] [Accepted: 06/15/2012] [Indexed: 05/22/2023]
Abstract
Previous research has shown that prenatal exposure to pesticides may be associated with decreased fetal growth. The specific pesticides investigated and results reported across studies have been inconsistent, and there is a mounting need for the consideration of mixtures rather than individual agents in studies of health outcomes in relation to environmental exposures. There are also many individual pesticides that have not been investigated in human health studies to date. We conducted a pilot study in rural Zhejiang province, China, measuring 20 non-persistent pesticides (10 insecticides, 6 herbicides, 3 fungicides, and 1 repellant) in umbilical cord blood of 112 full term (> 37 weeks) infants. The pesticides detected with the greatest frequency were diethyltoluamide (DEET) (73%), a repellant, and vinclozolin (49%), a fungicide. The samples had detectable concentrations for a mean of 4.6 pesticides (SD=1.9) with a maximum of 10. Adjusting for potential confounders, newborn birth weight was inversely associated with the number of pesticides detected in cord blood (p=0.04); birth weight decreased by a mean of 37.1g (95% CI, -72.5 to -1.8) for each detected pesticide. When assessing relationships by pesticide type, detection of fungicides was also associated with decreased birth weight (adjusted β=-116 g [95% CI, -212 to -19.2]). For individual pesticides analyzed as dichotomous (detect vs. non-detect) variables, only vinclozolin (adjusted β=-174 g [95% CI, -312 to -36.3]) and acetochlor (adjusted β=-165 g [95% CI, -325 to -5.7]) were significantly associated with reduced birth weight. No significant associations were seen between birth weight and individual pesticides assessed as continuous or 3-level ordinal variables. Our findings from this pilot investigation suggest that exposure to fungicides may adversely impact fetal growth. Exposure to mixtures of multiple pesticides is also of concern and should be explored in addition to individual pesticides. Additional research is needed to establish causality and to understand the function and impact of fungicides and pesticide mixtures on fetal development.
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Affiliation(s)
- Erin L. Wickerham
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI
| | - Betsy Lozoff
- Center for Human Growth and Development, University of Michigan, Ann Arbor, MI
| | - Jie Shao
- Department of Child Health Care, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Niko Kaciroti
- Center for Human Growth and Development, University of Michigan, Ann Arbor, MI
| | - Yankai Xia
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 210029, China
| | - John D. Meeker
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI
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Adverse effects on sexual development in rat offspring after low dose exposure to a mixture of endocrine disrupting pesticides. Reprod Toxicol 2012; 34:261-74. [DOI: 10.1016/j.reprotox.2012.05.090] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 05/16/2012] [Accepted: 05/21/2012] [Indexed: 11/23/2022]
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41
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Persistent developmental toxicity in rat offspring after low dose exposure to a mixture of endocrine disrupting pesticides. Reprod Toxicol 2012; 34:237-50. [DOI: 10.1016/j.reprotox.2012.05.099] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 05/23/2012] [Accepted: 05/25/2012] [Indexed: 11/20/2022]
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Virtanen HE, Adamsson A. Cryptorchidism and endocrine disrupting chemicals. Mol Cell Endocrinol 2012; 355:208-20. [PMID: 22127307 DOI: 10.1016/j.mce.2011.11.015] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 11/11/2011] [Accepted: 11/11/2011] [Indexed: 10/15/2022]
Abstract
Prospective clinical studies have suggested that the rate of congenital cryptorchidism has increased since the 1950s. It has been hypothesized that this may be related to environmental factors. Testicular descent occurs in two phases controlled by Leydig cell-derived hormones insulin-like peptide 3 (INSL3) and testosterone. Disorders in fetal androgen production/action or suppression of Insl3 are mechanisms causing cryptorchidism in rodents. In humans, prenatal exposure to potent estrogen diethylstilbestrol (DES) has been associated with increased risk of cryptorchidism. In addition, epidemiological studies have suggested that exposure to pesticides may also be associated with cryptorchidism. Some case-control studies analyzing environmental chemical levels in maternal breast milk samples have reported associations between cryptorchidism and chemical levels. Furthermore, it has been suggested that exposure levels of some chemicals may be associated with infant reproductive hormone levels.
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Nielsen E, Nørhede P, Boberg J, Krag Isling L, Kroghsbo S, Hadrup N, Bredsdorff L, Mortensen A, Christian Larsen J. Identification of Cumulative Assessment Groups of Pesticides. ACTA ACUST UNITED AC 2012. [DOI: 10.2903/sp.efsa.2012.en-269] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elsa Nielsen
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
| | - Pia Nørhede
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
| | - Julie Boberg
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
| | - Louise Krag Isling
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
| | - Stine Kroghsbo
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
| | - Niels Hadrup
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
| | - Lea Bredsdorff
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
| | - Alicja Mortensen
- National Food Institute, Technical University of Denmark, Mørkhøj Denmark
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Hu Y, Li DM, Han XD. Analysis of combined effects of nonylphenol and Monobutyl phthalate on rat Sertoli cells applying two mathematical models. Food Chem Toxicol 2012; 50:457-63. [DOI: 10.1016/j.fct.2011.12.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 12/08/2011] [Accepted: 12/09/2011] [Indexed: 12/27/2022]
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45
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Paiva JCG, Cabral IO, Soares BM, Sombra CML, Ferreira JRO, Moraes MO, Cavalcanti BC, Pessoa C. Biomonitoring of rural workers exposed to a complex mixture of pesticides in the municipalities of Tianguá and Ubajara (Ceará state, Brazil): genotoxic and cytogenetic studies. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2011; 52:492-501. [PMID: 21370288 DOI: 10.1002/em.20647] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 12/18/2010] [Accepted: 11/05/2011] [Indexed: 05/07/2023]
Abstract
In recent years, the use of pesticides in agriculture has been steadily increasing, and associations between exposure to agricultural chemicals and DNA damage and cancer have been reported. Brazil is one of the world leaders in pesticide use; however, studies that evaluate the impact of pesticide exposure on cancer incidence and mortality are very scarce in the Brazilian population. The alkaline comet assay and the chromosome aberration (CA) test were used to evaluate primary DNA damage in the peripheral blood lymphocytes of workers exposed to a complex mixture of pesticides in two small rural communities in the municipalities of Tianguá and Ubajara, located in the western part of Ceará State (Northeast Brazil), which are among the largest agricultural areas of the state. The comet assay showed that the damage index and damage frequency observed in the exposed groups were significantly higher in relation to the controls (P < 0.05). On the other hand, no differences were detected regarding structural and numerical CAs in the communities evaluated. Additionally, the observed levels of DNA strand breaks and frequencies of CAs, stratified for exposure time, were not statistically different for individuals of either rural community. Our results suggest that the damages caused by pesticides in our study area were not great enough to induce permanent mutations or to interfere with mitotic apparatus formation; minimal pesticide damages could have undergone cellular repair, explaining the absence of structural and numerical CAs.
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Affiliation(s)
- Jean C G Paiva
- Department of Physiology and Pharmacology, National Laboratory of Experimental Oncology, Federal University of Ceará, Fortaleza, Brazil
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46
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Toppari J, Virtanen HE, Main KM, Skakkebaek NE. Cryptorchidism and hypospadias as a sign of testicular dysgenesis syndrome (TDS): environmental connection. ACTA ACUST UNITED AC 2011; 88:910-9. [PMID: 20865786 DOI: 10.1002/bdra.20707] [Citation(s) in RCA: 159] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cryptorchidism and hypospadias are common genital birth defects that affect 2-9% and 0.2-1% of male newborns, respectively. The incidence of both defects shows large geographic variation, and in several countries increasing trends have been reported. The conditions share many risk factors, and they are also interlinked to the risk of testis cancer and poor semen quality. Testicular Dysgenesis Syndrome (TDS) may underlie many cases of all these male reproductive health problems. Genetic defects in androgen production or action can cause both cryptorchidism and hypospadias, but these are not common. A monogenic reason for cryptorchidism or hypospadias has been identified only in a small proportion of all cases. Environmental effects appear to play a major role in TDS. Exposure to several persistent chemicals has been found to be associated with the risk of cryptorchidism, and exposure to anti-androgenic phthalates has been shown to be associated with hormonal changes predisposing to male reproductive problems. Despite progress in identification of endocrine-disrupting substances, we are still far from knowing all the risk factors for these birth defects, and advice for prevention must be based on precautionary principles.
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Affiliation(s)
- Jorma Toppari
- Departments of Physiology and Pediatrics, University of Turku, Kiinamyllynkatu 10, Turku, Finland.
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47
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Endocrine disrupters—A threat to women's health? Maturitas 2011; 68:111-5. [DOI: 10.1016/j.maturitas.2010.10.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 10/13/2010] [Accepted: 10/15/2010] [Indexed: 12/14/2022]
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48
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Mejia M, Heghinian MD, Busch A, Armishaw CJ, Marí F, Godenschwege TA. A novel approach for in vivo screening of toxins using the Drosophila Giant Fiber circuit. Toxicon 2010; 56:1398-407. [PMID: 20723555 DOI: 10.1016/j.toxicon.2010.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 08/09/2010] [Accepted: 08/11/2010] [Indexed: 11/19/2022]
Abstract
Finding compounds that affect neuronal or muscular function is of great interest as potential therapeutic agents for a variety of neurological disorders. Alternative applications for these compounds include their use as molecular probes as well as insecticides. We have developed a bioassay that requires small amounts of compounds and allows for unbiased screening of biological activity in vivo. For this, we paired administering compounds in a non-invasive manner with simultaneous electrophysiological recordings from a well-characterized neuronal circuit, the Giant Fiber System of Drosophila melanogaster, which mediates the escape response of the fly. The circuit encompasses a variety of neurons with cholinergic, glutamatergic, and electrical synapses as well as neuromuscular junctions. Electrophysiological recordings from this system allow for the detection of compound-related effects against any molecular target on these components. Here, we provide evidence that this novel bioassay works with small molecules such as the cholinergic receptor blocker mecamylamine hydrochloride and the potassium channel blocker tetraethylammonium hydroxide, as well as with venom from Conus brunneus and isolated conopeptides. Conopeptides have been developed into powerful drugs, such as the painkillers Prialt™ and Xen2174. However, most conopeptides have yet to be characterized, revealing the need for a rapid and straightforward screening method. Our findings show that mecamylamine hydrochloride, as well as the α-conotoxin ImI, which is known to be an antagonist of the human α7 nicotinic acetylcholine receptor, efficiently disrupted the synaptic transmission of a Drosophila α7 nicotinic acetylcholine receptor-dependent pathway in our circuit but did not affect the function of neurons with other types of synapses. This demonstrates that our bioassay is a valid tool for screening for compounds relevant to human health.
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Affiliation(s)
- Monica Mejia
- Department of Biological Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA
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