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Glinski DA, Purucker ST, Minucci JM, Richardson RT, Lin CH, Johnson RM, Henderson WM. Analysis of contaminant residues in honey bee hive matrices. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 954:176329. [PMID: 39304159 DOI: 10.1016/j.scitotenv.2024.176329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 09/04/2024] [Accepted: 09/15/2024] [Indexed: 09/22/2024]
Abstract
Pollinators provide ecological services essential to maintaining our food supply and propagating natural habitats. Populations are in decline due to environmental stressors including pesticides, pathogens, and habitat loss. To better understand the impacts of pesticide exposures on colony health, a field survey in Ohio, USA was conducted to monitor the potential contamination of honey bee colonies by pesticides. Apiaries (n = 10) were situated across an agricultural gradient and samples were collected over a 4-week period encompassing corn planting. Dead bees from entrance traps (DBT), pollen, and in-hive (IH) matrices including bee bread, honey, larvae, and nurse bees were analyzed for a whole suite of pesticides. Out of 210 pesticides targeted, 68 residues were quantified across 306 samples. Neonicotinoids, miticides, and fungicides were the dominant pesticide classes identified throughout all the matrix types. Neonicotinoids were detected at higher concentrations and at higher frequencies compared to fungicides, specifically in field pollen samples. DBT also contained high concentrations of these two contaminant classes, although detection frequencies for neonicotinoids were typically lower. Overall, herbicides and non‑neonicotinoid insecticides were found with low frequency and at low concentrations. For most pesticide classes, trends for the mean concentrations were DBT > IH nurse bees > field pollen > IH larvae > IH honey. Pesticides were detected in 100 % of samples with concentrations ranging from 0.01 ppb (diphenylamine) to 2790 ppb (clothianidin). All samples were contaminated with at least two pesticide residues, while 19 samples presented over ten detects and maximum detections of 20 in DBT. Pesticide residues were positively correlated with agricultural gradients across sites and sampling periods. These findings reveal that foraging leads to the exposure of the entire colony to a wide range of pesticides. Moreover, residues determined in DBT serve as an effective proxy for monitoring hive matrices with significantly less disturbance to active hives.
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Affiliation(s)
- Donna A Glinski
- U.S. Environmental Protection Agency, ORD/CEMM/EPD, Athens, GA 30605, USA
| | - S Thomas Purucker
- U.S. Environmental Protection Agency, ORD/CCTE/GLTED, Research Triangle Park, NC 27709, USA
| | - Jeffrey M Minucci
- U.S. Environmental Protection Agency, ORD/CPHEA/PHESD, Research Triangle Park, NC 27709, USA
| | | | - Chia-Hua Lin
- Department of Entomology, The Ohio State University, Rothenbuhler Honey Bee Research Laboratory, Columbus, OH 43210, USA
| | - Reed M Johnson
- Department of Entomology, The Ohio State University-Ohio Agricultural Research and Development Center, Wooster, OH 44691, USA
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2
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Boon D, Burns CJ. Biomonitoring of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide: A global view. Regul Toxicol Pharmacol 2024; 152:105687. [PMID: 39168368 DOI: 10.1016/j.yrtph.2024.105687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Revised: 08/14/2024] [Accepted: 08/15/2024] [Indexed: 08/23/2024]
Abstract
We conducted a literature review of urinary 2,4-D in populations not associated with a herbicide application. Of the 33 studies identified, the median/mean concentrations were similar for children, adults, and pregnant women regardless of geography. Individuals with highest concentrations may have had opportunities to directly contact 2,4-D outside of an application. Most studies were conducted in populations in North America and did not examine potential sources of 2,4-D, or what factors might influence higher or lower urinary 2,4-D concentrations. In the future, prioritizing the examination of 2,4-D biomonitoring in other regions and collecting information on sources and factors influencing exposures would better our understanding of 2,4-D exposures globally. In all the studies reviewed the concentrations of urinary 2,4-D observed were orders of magnitude below the US regulatory endpoints, suggesting that people are not being exposed to 2,4-D at levels high enough to result in adverse health effects.
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Affiliation(s)
| | - Carol J Burns
- Burns Epidemiology Consulting, LLC, Thompsonville, MI, 49683 USA.
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3
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de Rezende LM, da Silva Santos S, Monteiro GTR. Exposure to pesticides and breast cancer in the city of Petrópolis, Brazil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:56534-56541. [PMID: 36920612 PMCID: PMC10015526 DOI: 10.1007/s11356-023-26420-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
To investigate the association between pesticide use and breast cancer. A hospital-based case-control study was conducted in Petrópolis city, Brazil. The study data were obtained through interviews, and the magnitude of the association between self-reported pesticide exposure and breast cancer was determined using unconditional logistic regression. A higher estimated risk for breast cancer was found in women exposed to pesticides for 10 or more years, where this association was not statistically significant after adjusting for potential confounders (OR = 1.40; 95% CI 0.85-2.49). A positive statistically significant association was found between breast cancer and higher educational level or previous use of hormone replacement therapy (HRT), whereas having had 2 or more pregnancies to term proved a protective factor. Further studies elucidating the contribution of pesticide exposure to the development of breast cancer are needed, given that current findings in the literature are conflicting.
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Affiliation(s)
- Louise Moura de Rezende
- National School of Public Health (ENSP, Escola Nacional de Saúde Pública), Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Sabrina da Silva Santos
- National School of Public Health (ENSP, Escola Nacional de Saúde Pública), Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, Brazil.
| | - Gina Torres Rego Monteiro
- National School of Public Health (ENSP, Escola Nacional de Saúde Pública), Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, RJ, Brazil
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4
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Shi G, Zhang C, Li G, Wang K, Cai Q, Huang M. Atrazine induces phagocytotic dysfunction of microglia depends on nucleocytoplasmic translocation of acetylated HMGB1. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 252:114583. [PMID: 36736232 DOI: 10.1016/j.ecoenv.2023.114583] [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: 11/13/2022] [Revised: 01/19/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Atrazine (ATR) is a widely applied herbicide which was named an environmental endocrine disrupting chemical (EDC). Increasing evidence indicates ATR causes neurotoxic effects resulting in central nervous system (CNS) disease. As the primary immunocytes in the CNS, microglia cells carry out their phagocytosis to maintain the CNS microenvironment by preventing damage from healthy cells. However, the mechanism in which ATR affects the phagocytic function of microglia remains unclear. The present study was designed to investigate the effect of ATR on the phagocytosis of microglia. BV-2 cells and primary microglia selected as microglial models in which BV-2 cells were administrated by ATR at different concentrations (0, 4, 8, 16 μM) for 24 h. Results demonstrated ATR dose-dependently increased the expression of ionized calcium binding adapter molecule 1 (Iba-1), indicating that microglia were activated. Microglial phagocytotic activity induced by ATR fluctuated at the different time points, accompanied by fluctuations in membrane receptor MERTK and cytoplasmic lysosomal marker LAMP1 (two markers related to cell phagocytosis). In this period, the expression of iNOS gradually increased. A mechanistic study further demonstrated that the translocation of High Mobility Group Protein-B1 (HMGB1) from nucleus to cytoplasm in the BV-2 and primary microglial cells induced by ATR, and the process showed a positive correlation with phagocytosis activity of BV-2 cells induced by ATR (r = 0.8030, P = 0.05; α = 0.1). ATR was also shown to spur the acetylation of HMGB1 by breaking the balance between acetylase P300 and deacetylase SIRT1. Unexpectedly, the inhibition of acetylating HMGB1 by resveratrol (Res) was effectively retained by HMGB1 in the nucleus, reversed the SIRT1 and MERTK expression, and enhanced the phagocytosis activity in BV-2 cells. Our results suggested that ATR exposure influenced microglial phagocytosis by acetylating HMGB1 further translocated it in the nucleoplasm.
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Affiliation(s)
- Ge Shi
- School of Public Health and Management, Ningxia Medical University, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China; Key Laboratory of Environmental Factors and Chronic Disease Control, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China
| | - Chunhui Zhang
- School of Public Health and Management, Ningxia Medical University, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China; Key Laboratory of Environmental Factors and Chronic Disease Control, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China
| | - Guoliang Li
- School of Public Health and Management, Ningxia Medical University, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China; Key Laboratory of Environmental Factors and Chronic Disease Control, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China
| | - Kaidong Wang
- School of Public Health and Management, Ningxia Medical University, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China; Key Laboratory of Environmental Factors and Chronic Disease Control, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China
| | - Qian Cai
- School of Public Health and Management, Ningxia Medical University, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China; Key Laboratory of Environmental Factors and Chronic Disease Control, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China.
| | - Min Huang
- School of Public Health and Management, Ningxia Medical University, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China; Key Laboratory of Environmental Factors and Chronic Disease Control, No.1160, the Street of Shengli, Xingqing District, Yinchuan, Ningxia, China.
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5
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González-Palomo AK, Ruíz-Rodríguez VM, Hernández-Blanco DV, Pérez Vázquez FJ, Alcántara-Quintana LE, Cortés-Garcia JD. Atrazine modifies markers of melanocyte maturation and apoptosis in primary skin cultures. Toxicol Mech Methods 2023; 33:233-238. [PMID: 36093949 DOI: 10.1080/15376516.2022.2124135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Atrazine (ATZ) is part of a group of herbicides called triazines. ATZ is widely used in agricultural areas of Mexico, commonly used for the selective control of weeds in corn and sorghum crops. The exposure to ATZ can have serious human health effects since its use was associated with the development of cutaneous melanoma in an epidemiological study. The aim of this study was to evaluate the expression of maturation and apoptotic markers in primary skin cultures exposed to ATZ. The primary skin cultures were exposed to 0.1, and 10 µM ATZ with or without ultraviolet (UV) radiation and the expression of maturation and apoptotic markers were evaluated by RT-qPCR. We observed a significant increase in all the melanocyte maturation markers in cells exposed to ATZ with or without UV, with SOX-9 and FAK (melanoblast markers) being the highest. Also, the expression of BCL-2 (anti-apoptotic marker) was the most increased gene in cells exposed to ATZ with or without UV. Low concentrations of ATZ and UV radiation induce genetic changes associated with the development of immature melanocytes and activate mechanisms associated with the inhibition of apoptosis characteristics of malignant cell transformation, which will allow proposing new therapeutic targets and generating new restrictions or care in farmers exposed to pesticides such as the ATZ.
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Affiliation(s)
- Ana K González-Palomo
- Coordinación para la Innvoación de la Ciencia y Tecnología (CIACYT), Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Victor M Ruíz-Rodríguez
- División de Biología Molecular, Laboratorio de Neurobiología, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí, México
| | - Diana V Hernández-Blanco
- Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México.,Departamento de Dermatologia, Hospital Central "Dr Ignacio Morones Prieto", San Luis Potosi, Mexico
| | - Francisco J Pérez Vázquez
- Coordinación para la Innvoación de la Ciencia y Tecnología (CIACYT), Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Luz E Alcántara-Quintana
- Coordinación para la Innvoación de la Ciencia y Tecnología (CIACYT), Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - Juan D Cortés-Garcia
- Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México.,Departamento de Dermatologia, Hospital Central "Dr Ignacio Morones Prieto", San Luis Potosi, Mexico
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Li P, Yao LY, Jiang YJ, Wang DD, Wang T, Wu YP, Li BX, Li XT. Soybean isoflavones protect SH-SY5Y neurons from atrazine-induced toxicity by activating mitophagy through stimulation of the BEX2/BNIP3/NIX pathway. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 227:112886. [PMID: 34673406 DOI: 10.1016/j.ecoenv.2021.112886] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
Atrazine (ATR) is a widely used herbicide that can induce the degeneration of dopaminergic (DAergic) neurons in the substantia nigra, resulting in a Parkinson's disease-like syndrome. Despite the high risk of environmental exposure, few studies have investigated strategies for the prevention of ATR neurotoxicity. Our previous studies demonstrated that ATR can impair mitochondrial function, leading to metabolic failure. Cells maintain mitochondrial quality through selective autophagic elimination, termed mitophagy. Soybean isoflavones (SI) possess multiple beneficial bioactivities, including preservation of mitochondria function, so it was hypothesized that SI can protect neurons against ATR toxicity by promoting mitophagy. Pretreatment of SH-SY5Y neurons with SI prevented ATR-induced metabolic failure and cytotoxicity as assessed by intracellular ATP, Na+-K+-ATPase activity, mitochondrial membrane potential, and cell viability assays. The neuroprotective efficacy of SI was superior to the major individual components genistein, daidzein, and glycitein. Ultrastructural analyses revealed that ATR induced mitochondrial damage, while SI promoted the sequestration of damaged mitochondria into autophagic vesicles. Soybean isoflavones also induced mitophagy as evidenced by upregulated expression of BNIP3/NIX, BEX2, and LC3-II, while co-treatment with the mitophagy inhibitor Mdivi-1 blocked SI-mediated neuroprotection and prevented SI from reversing ATR-induced BEX2 downregulation. Furthermore, BEX2 knockdown inhibited SI-induced activation of the BNIP3/NIX pathway, mitophagy, and neuroprotection. These findings suggest that SI protects against ATR-induced mitochondrial dysfunction and neurotoxicity by activating the BEX2/BNIP3/NIX pathway.
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Affiliation(s)
- Peng Li
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
| | - Li-Yan Yao
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
| | - Yu-Jia Jiang
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
| | - Dan-Dan Wang
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
| | - Ting Wang
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
| | - Yan-Ping Wu
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
| | - Bai-Xiang Li
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
| | - Xue-Ting Li
- Department of Epidemiology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province 150081, China.
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Rousis NI, Gracia-Lor E, Hernández F, Poretti F, Santos MM, Zuccato E, Castiglioni S. Wastewater-based epidemiology as a novel tool to evaluate human exposure to pesticides: Triazines and organophosphates as case studies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 793:148618. [PMID: 34182454 DOI: 10.1016/j.scitotenv.2021.148618] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/01/2021] [Accepted: 06/19/2021] [Indexed: 05/24/2023]
Abstract
Production and application of pesticides have risen remarkably in the last few decades. Even if they provide many benefits, they can be hazardous for humans and ecosystems when they are not used cautiously. Human exposure to pesticides is well documented, but new approaches are needed to boost the available information. This work proposes a new application of wastewater-based epidemiology (WBE) to assess the exposure of the general population to organophosphate and triazine pesticides (pyrethroid pesticides have already been validated). Several human urinary metabolites tested as WBE biomarkers, were suitable. Untreated wastewater samples from different European countries were analyzed by liquid chromatography-tandem mass spectrometry. Biomarker concentrations were converted to mass loads and used to back-calculate the local population's exposure to the parent pesticides, using specific correction factors developed in this study. Exposure to organophosphates and pyrethroids showed spatial and seasonal variations. Finally, pesticide exposure was estimated in twenty cities of ten European countries and compared with the acceptable daily intake, concluding that some populations might face health risks. The study confirms WBE as a suitable approach for assessing the average community exposure to pesticides and is a valuable complementary biomonitoring tool. WBE can provide valuable data for public health.
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Affiliation(s)
- Nikolaos I Rousis
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Environmental Health Sciences, Via Mario Negri 2, 20156 Milan, Italy.
| | - Emma Gracia-Lor
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Environmental Health Sciences, Via Mario Negri 2, 20156 Milan, Italy; Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Félix Hernández
- Research Institute for Pesticides and Water, University Jaume I, Avda. Sos Baynat s/n, E-12071 Castellon, Spain
| | - Francesco Poretti
- Consorzio Depurazione Acque Lugano e Dintorni, Via Molinazzo 1, 6934 Bioggio, Switzerland
| | - Miguel M Santos
- CIMAR/CIIMAR - LA, Interdisciplinary Centre of Marine and Environmental Research, Group of Endocrine Disruptors and Emerging Contaminants, FCUP, Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Ettore Zuccato
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Environmental Health Sciences, Via Mario Negri 2, 20156 Milan, Italy
| | - Sara Castiglioni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Environmental Health Sciences, Via Mario Negri 2, 20156 Milan, Italy
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8
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Runström Eden G, Tinnerberg H, Rosell L, Möller R, Almstrand AC, Bredberg A. Exploring Methods for Surveillance of Occupational Exposure from Additive Manufacturing in Four Different Industrial Facilities. Ann Work Expo Health 2021; 66:163-177. [PMID: 34486024 PMCID: PMC8855698 DOI: 10.1093/annweh/wxab070] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 07/08/2021] [Accepted: 08/16/2021] [Indexed: 01/11/2023] Open
Abstract
3D printing, a type of additive manufacturing (AM), is a rapidly expanding field. Some adverse health effects have been associated with exposure to printing emissions, which makes occupational exposure studies important. There is a lack of exposure studies, particularly from printing methods other than material extrusion (ME). The presented study aimed to evaluate measurement methods for exposure assessment in AM environments and to measure exposure and emissions from four different printing methods [powder bed fusion (PBF), material extrusion (ME), material jetting (MJ), and vat photopolymerization] in industry. Structured exposure diaries and volatile organic compound (VOC) sensors were used over a 5-day working week. Personal and stationary VOC samples and real-time particle measurements were taken for 1 day per facility. Personal inhalable and respirable dust samples were taken during PBF and MJ AM. The use of structured exposure diaries in combination with measurement data revealed that comparatively little time is spent on actual printing and the main exposure comes from post-processing tasks. VOC and particle instruments that log for a longer period are a useful tool as they facilitate the identification of work tasks with high emissions, highlight the importance of ventilation and give a more gathered view of variations in exposure. No alarming levels of VOCs or dust were detected during print nor post-processing in these facilities as adequate preventive measures were installed. As there are a few studies reporting negative health effects, it is still important to keep the exposure as low as reasonable.
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Affiliation(s)
- Gunilla Runström Eden
- University of Gothenburg, Institute of Medicine, Sahlgrenska Academy, School of Public Health and Community Medicine, Gothenburg, Sweden
| | - Håkan Tinnerberg
- University of Gothenburg, Institute of Medicine, Sahlgrenska Academy, School of Public Health and Community Medicine, Gothenburg, Sweden
| | - Lars Rosell
- RISE, Research Institutes of Sweden, Gothenburg, Sweden
| | - Rickie Möller
- University of Gothenburg, Institute of Medicine, Sahlgrenska Academy, School of Public Health and Community Medicine, Gothenburg, Sweden
| | - Ann-Charlotte Almstrand
- University of Gothenburg, Institute of Medicine, Sahlgrenska Academy, School of Public Health and Community Medicine, Gothenburg, Sweden
| | - Anna Bredberg
- RISE, Research Institutes of Sweden, Gothenburg, Sweden
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9
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Molina-Guzmán LP, Ríos-Osorio LA. Occupational health and safety in agriculture. A systematic review. REVISTA DE LA FACULTAD DE MEDICINA 2020. [DOI: 10.15446/revfacmed.v68n4.76519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Introduction: The prevalence of occupational diseases in the agricultural sector is higher than in other industries, since agricultural workers are at higher risk of exposure to different chemicals and pesticides, and are more prone to occupational accidents.Objective: To conduct a review of recent literature on occupational health and risk in agriculture.Materials and methods: A literature search was conducted in PubMed, SciencieDirect and Scopus using the following search strategy: type of articles: original research papers; language: English; publication period: 2006-2016; search terms: "agricultural health", "agrarian health", "risk factors", "epidemiology", "causality" and "occupational", used in different combinations ("AND" and "OR").Results: The search yielded 350 articles, of which 102 met the inclusion criteria. Moreover, 5 articles were found in grey literature sources and included in the final analysis. Most research on this topic has been conducted in the United States, which produced 91% (97/107) of the articles included.Conclusions: Most studies on health and safety in agriculture focused primarily on the harmful effects of occupational exposure to agrochemicals and pesticides, and the consequences of occupational accidents. However, since more than 90% of these studies come from the United States, a more comprehensive approach to health in agriculture is required, since what is reported here may be far from the reality of other regions, especially Latin America.
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10
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Li P, Li X, Yao L, Wu Y, Li B. Soybean isoflavones prevent atrazine-induced neurodegenerative damage by inducing autophagy. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 190:110065. [PMID: 31869719 DOI: 10.1016/j.ecoenv.2019.110065] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 09/12/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
Atrazine (ATR) is a widely used herbicide with documented dopaminergic (DAergic) neurotoxicity that can lead to a Parkinson's disease (PD)-like motor syndrome. However, there have been few studies on preventative interventions. The aim of the present study was to investigate the neuroprotective efficacy of soybean isoflavones (SI) and associated molecular mechanisms in a rat model of ATR-induced DAergic toxicity. Male Sprague-Dawley rats (6 weeks old) received daily intraperitoneal injection of SI (10, 50, or 100 mg/kg) or vehicle followed 1 h later by oral gavage of ATR (50 mg/kg) for 45 consecutive days. Open field and grip-strength tests indicated no differences in motor function among treatment groups. Alternatively, histopathology revealed neuronal damage in the striatum of rats receiving vehicle plus ATR that was ameliorated by SI pretreatment. SI attenuate ATR-induced oxidative stress (indicated by MDA accumulation and GSH depletion) and inflammatory damage (as evidenced by TNF-α and IL-6 elevation) in the substantia nigra. ATR increased expression of the pro-apoptotic factor Bax and reduced expression levels of the DA synthesis enzyme tyrosine hydroxylase (TH) and the anti-apoptotic factor Bcl-2 in the substantia nigra and striatum. All of these effects were reversed by SI pretreatment, suggesting that SI can inhibit ATR-induced apoptosis of DAergic neurons. ATR also inhibited autophagy in the substantial nigra as evidenced by LC3-II and Beclin-1 downregulation and increased expression of p62, whereas SI pretreatment reversed these effects, indicating autophagy induction. Furthermore, ATR increased the expression of mTOR and reduced the expression of phosphorylated S6 (p-S6) and BEX2 in the substantia nigra. Collectively, these findings suggest that SI can prevent ATR-mediated degeneration of DAergic neurons by inducing autophagy through an mTOR-dependent signaling pathway.
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Affiliation(s)
- Peng Li
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province, 150081, PR China.
| | - Xueting Li
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province, 150081, PR China.
| | - Liyan Yao
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province, 150081, PR China.
| | - Yanping Wu
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province, 150081, PR China.
| | - Baixiang Li
- Department of Hygienic Toxicology, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang Province, 150081, PR China.
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11
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Watthaisong P, Pongpamorn P, Pimviriyakul P, Maenpuen S, Ohmiya Y, Chaiyen P. A Chemo‐Enzymatic Cascade for the Smart Detection of Nitro‐ and Halogenated Phenols. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Pratchaya Watthaisong
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
| | - Pornkanok Pongpamorn
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
| | - Panu Pimviriyakul
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
| | - Somchart Maenpuen
- Department of BiochemistryFaculty of ScienceBurapha University Chonburi 20131 Thailand
| | - Yoshihiro Ohmiya
- National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki 305-8566 Japan
| | - Pimchai Chaiyen
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
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Watthaisong P, Pongpamorn P, Pimviriyakul P, Maenpuen S, Ohmiya Y, Chaiyen P. A Chemo‐Enzymatic Cascade for the Smart Detection of Nitro‐ and Halogenated Phenols. Angew Chem Int Ed Engl 2019; 58:13254-13258. [DOI: 10.1002/anie.201904923] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 06/15/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Pratchaya Watthaisong
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
| | - Pornkanok Pongpamorn
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
| | - Panu Pimviriyakul
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
| | - Somchart Maenpuen
- Department of BiochemistryFaculty of ScienceBurapha University Chonburi 20131 Thailand
| | - Yoshihiro Ohmiya
- National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki 305-8566 Japan
| | - Pimchai Chaiyen
- School of Biomolecular Science & Engineering (BSE)Vidyasirimedhi Institute of Science and Technology (VISTEC) Wangchan Valley Rayong 21210 Thailand
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Atabila A, Phung DT, Sadler R, Connell D, Chu C. Comparative evaluation of chlorpyrifos exposure estimates from whole-body dermal dosimetry and urinary trichloro-2-pyridinol (TCP) methods. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 172:439-443. [PMID: 30735976 DOI: 10.1016/j.ecoenv.2019.01.077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 01/20/2019] [Accepted: 01/24/2019] [Indexed: 06/09/2023]
Abstract
Chlorpyrifos is one of the most widely used organophosphate pesticides and has a record of adverse effects on applicators. Assessment of exposure to chlorpyrifos based on its urinary metabolite, 3,5,6-trichloro-2-pyridinol (TCP), is considered as the most accurate. However, urine sampling can be difficult, and the laboratory analytical procedures involved are complex and expensive. A simpler approach for assessing pesticide exposure among applicators is the whole-body dermal dosimetry method, but this needs validation. The objective of this study was to compare chlorpyrifos exposure estimates obtained separately with the urinary TCP and the whole-body dermal dosimetry methods from applicators. Exposure estimates from the whole-body dermal dosimetry method (5-29 μg/kg/day) showed less variation than those from the urinary TCP method (1-71 μg/kg/day), but both were in close agreement at the mean level (16 μg/kg/day and 15 μg/kg/day, respectively). The whole-body dermal dosimetry method is therefore valid for providing estimates of the typical levels of pesticide exposure among applicators in situations where the urinary TCP method cannot be applied.
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Affiliation(s)
- Albert Atabila
- Centre for Environment and Population Health, Griffith School of Environment and Science, Griffith University, 170 Kessel Road, Nathan, QLD 4111, Australia.
| | - Dung Tri Phung
- Centre for Environment and Population Health, Griffith School of Environment and Science, Griffith University, 170 Kessel Road, Nathan, QLD 4111, Australia
| | - Ross Sadler
- Centre for Environment and Population Health, Griffith School of Environment and Science, Griffith University, 170 Kessel Road, Nathan, QLD 4111, Australia
| | - Des Connell
- Centre for Environment and Population Health, Griffith School of Environment and Science, Griffith University, 170 Kessel Road, Nathan, QLD 4111, Australia
| | - Cordia Chu
- Centre for Environment and Population Health, Griffith School of Environment and Science, Griffith University, 170 Kessel Road, Nathan, QLD 4111, Australia
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Ma K, Wu H, Li P, Li B. LC3-II may mediate ATR-induced mitophagy in dopaminergic neurons through SQSTM1/p62 pathway. Acta Biochim Biophys Sin (Shanghai) 2018; 50:1047-1061. [PMID: 30084861 DOI: 10.1093/abbs/gmy091] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/05/2018] [Indexed: 11/12/2022] Open
Abstract
Atrazine (2-chloro-4-ethylamino-6-isopropylamine-1,3,5-triazine; ATR) has been demonstrated to regulate autophagy- and apoptosis-related proteins in doparminergic neuronal damage. In our study, we investigated the role of LC3-II in ATR-induced degeneration of dopaminergic neurons. In vivo dopaminergic neuron degeneration model was set up with ATR treatment and confirmed by the behavioral responses and pathological analysis. Dopaminergic neuron cells were transfected with LC3-II siRNA and treated with ATR to observe cell survival and reactive oxygen species release. The process of mitochondrial autophagy and the neurotoxic effects of mitochondrial autophagy were detected by immunofluorescence assay, immunohistochemical analysis, real-time PCR, and western blot analysis. Results showed that after ATR treatment, the grip strength of Wistar rats was significantly decreased, and behavioral signs of anxiety were clearly observed. The mRNA and protein levels of tyrosine hydroxylase, LC3-II, PINK1, and Parkin were significantly decreased in ATR-induced rat dopaminergic neurons and PC-12 cells, while the mRNA expression and protein levels of SQSTM1/p62 and Parl were increased. Exposure to ATR also led to accumulation of autophagic lysosomes and autophagic bodies along with significantly decreased levels of dopaminergic neurons and alterations in mitochondrial homeostasis, which was reversed by LC3-II siRNA. Our results suggest that ATR affects the mitochondria-mediated dopaminergic neuronal death, which may be mediated by LC3-II and other autophagy markers in vivo and in vitro through SQSTM1/p62 signaling pathway.
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Affiliation(s)
- Kun Ma
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
| | - Haoyu Wu
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
| | - Peng Li
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
| | - Baixiang Li
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
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Oxidative stress in triazine pesticide toxicity: a review of the main biomarker findings. Arh Hig Rada Toksikol 2018; 69:109-125. [DOI: 10.2478/aiht-2018-69-3118] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/01/2018] [Indexed: 11/20/2022] Open
Abstract
Abstract
This review article provides a summary of the studies relying on oxidative stress biomarkers (lipid peroxidation and antioxidant enzymes in particular) to investigate the effects of atrazine and terbuthylazine exposure in experimental animals and humans published since 2010. In general, experimental animals showed that atrazine and terbuthylazine exposure mostly affected their antioxidant defences and, to a lesser extent, lipid peroxidation, but the effects varied by the species, sex, age, herbicide concentration, and duration of exposure. Most of the studies involved aquatic organisms as useful and sensitive bio-indicators of environmental pollution and important part of the food chain. In laboratory mice and rats changes in oxidative stress markers were visible only with exposure to high doses of atrazine. Recently, our group reported that low-dose terbuthylazine could also induce oxidative stress in Wistar rats. It is evident that any experimental assessment of pesticide toxic effects should take into account a combination of several oxidative stress and antioxidant defence biomarkers in various tissues and cell compartments. The identified effects in experimental models should then be complemented and validated by epidemiological studies. This is important if we wish to understand the impact of pesticides on human health and to establish safe limits.
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Atabila A, Sadler R, Phung DT, Hogarh JN, Carswell S, Turner S, Patel R, Connell D, Chu C. Biomonitoring of chlorpyrifos exposure and health risk assessment among applicators on rice farms in Ghana. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:20854-20867. [PMID: 29766419 DOI: 10.1007/s11356-018-2259-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 05/07/2018] [Indexed: 05/24/2023]
Abstract
Chlorpyrifos is a neurotoxic insecticide that is widely used in the agricultural sector of Ghana. The main objective of this study was to evaluate the levels of chlorpyrifos exposure and health risk among applicators (n = 21) on irrigated rice farms in Ghana, based on a typical application event. Pre- and post-application urine samples (24-h) were collected from the applicators and analysed for 3,5,6-trichloro-2-pyridinol (TCP), using LC-MS/MS. The levels of chlorpyrifos-absorbed dose with the applicators were estimated from the urinary TCP levels. Prior to application, the median absorbed dose of chlorpyrifos (background exposure) with the applicators was 0.2 μg/kg/day (range 0.05 to 2 μg/kg/day). Following application, the median absorbed dose of chlorpyrifos (application exposure) increased 30-fold to 6 μg/kg/day (range 0.7 to 74 μg/kg/day). The mean elimination half-life (t1/2) of chlorpyrifos was calculated to be 50 h. Hazard quotient (HQ) values (HQ > 1) obtained with the chronic (10 μg/kg/day) and acute (100 μg/kg/day) guideline values of the WHO suggested no risk of chronic or acute health effects, respectively, among both the median and 5% highly exposed groups. However, HQ values (HQ > 1) obtained with the chronic (0.3 μg/kg/day) and acute (5 μg/kg/day) guideline values of the USEPA suggested risk of chronic and acute health effects, respectively, among both the median and 5% highly exposed groups. The quantity of chlorpyrifos formulation applied, spraying duration, and the number of spray tanks applied significantly correlated with the absorbed dose levels of chlorpyrifos from application exposure. Therefore, these factors suggest means to reduce exposure and consequent health risk among the applicators.
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Affiliation(s)
- Albert Atabila
- Centre for Environment and Population Health, Griffith School of Environment, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia.
| | - Ross Sadler
- Centre for Environment and Population Health, Griffith School of Environment, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia
| | - Dung Tri Phung
- Centre for Environment and Population Health, Griffith School of Environment, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia
| | - Jonathan N Hogarh
- Department of Environmental Science, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Stewart Carswell
- Queensland Health Forensic and Scientific Services, 39 Kessels Road, Coopers Plains, QLD, 4108, Australia
| | - Scott Turner
- Queensland Health Forensic and Scientific Services, 39 Kessels Road, Coopers Plains, QLD, 4108, Australia
| | - Renu Patel
- Queensland Health Forensic and Scientific Services, 39 Kessels Road, Coopers Plains, QLD, 4108, Australia
| | - Des Connell
- Centre for Environment and Population Health, Griffith School of Environment, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia
| | - Cordia Chu
- Centre for Environment and Population Health, Griffith School of Environment, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia
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Lin J, Zhao HS, Qin L, Li XN, Zhang C, Xia J, Li JL. Atrazine Triggers Mitochondrial Dysfunction and Oxidative Stress in Quail ( Coturnix C. coturnix) Cerebrum via Activating Xenobiotic-Sensing Nuclear Receptors and Modulating Cytochrome P450 Systems. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6402-6413. [PMID: 29865786 DOI: 10.1021/acs.jafc.8b01413] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The residues from the widely used broad-spectrum environmental herbicide, atrazine (ATR), result in the exposure of nontarget organisms and persist as a global major public health hazard. ATR is neurotoxic and may cause adverse health effects in mammals, birds, and fishes. Nevertheless, the molecular mechanism of ATR induced neurotoxicity remains unclear. To assess the molecular mechanisms of ATR-induced cerebral toxicity through potential oxidative damage, quail were treated with ATR by oral gavage administration at doses of 0, 50, 250, and 500 mg/kg body weight daily for 45 days. Markedly, increases in the amount of swelling of neuronal cells, the percentage of mean damaged mitochondria, mitochondrial malformation, and mitochondrial vacuolar degeneration as well as decreases in the mitochondrial cristae and mitochondrial volume density were observed by light and electron microscopy in the cerebrum of quail. ATR induced toxicities in the expression of mitochondrial function-related genes and promoted oxidative damage, as indicated by effects on oxidative stress indices. These results indicated that ATR exposure can cause neurological disorders and cerebral injury. ATR may initiate apoptosis by activating Bcl-2, Bax, and Caspase3 protein expression but failed to induce autophagy (LC3B has not cleaved to LC3BI/II). Furthermore, ATR induced CYP-related enzymes metabolism disorders by activating the nuclear xenobiotic receptors response (NXRs including AHR, CAR, and PXR) and increased expression of several CYP isoforms (including CYP1B1 and CYP2C18) and thereby producing mitochondrial dysfunction. In this study, we observed ATR exposure resulted in oxidative stress and mitochondrial dysfunction by activating the NXR response and interfering the CYP450s homeostasis in quail cerebrum that supported the molecular mechanism of ATR induced cerebrum toxicity. In conclusion, these results provided new evidence on molecular mechanism of ATR induced neurotoxicity.
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Affiliation(s)
| | | | - Lei Qin
- Laboratory Animal Centre , Qiqihar Medical University , Qiqihar 161006 , P.R. China
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LaKind JS, Burns CJ, Naiman DQ, O'Mahony C, Vilone G, Burns AJ, Naiman JS. Critical and systematic evaluation of data for estimating human exposures to 2,4-dichlorophenoxyacetic acid (2,4-D) - quality and generalizability. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2017; 20:423-446. [PMID: 29157177 DOI: 10.1080/10937404.2017.1396704] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) has been commercially available since the 1940's. Despite decades of data on 2,4-D in food, air, soil, and water, as well as in humans, the quality the quality of these data has not been comprehensively evaluated. Using selected elements of the Biomonitoring, Environmental Epidemiology, and Short-lived Chemicals (BEES-C) instrument (temporal variability, avoidance of sample contamination, analyte stability, and urinary methods of matrix adjustment), the quality of 156 publications of environmental- and biomonitoring-based 2,4-D data was examined. Few publications documented steps were taken to avoid sample contamination. Similarly, most studies did not demonstrate the stability of the analyte from sample collection to analysis. Less than half of the biomonitoring publications reported both creatinine-adjusted and unadjusted urine concentrations. The scope and detail of data needed to assess temporal variability and sources of 2,4-D varied widely across the reviewed studies. Exposures to short-lived chemicals such as 2,4-D are impacted by numerous and changing external factors including application practices and formulations. At a minimum, greater transparency in reporting of quality control measures is needed. Perhaps the greatest challenge for the exposure community is the ability to reach consensus on how to address problems specific to short-lived chemical exposures in observational epidemiology investigations. More extensive conversations are needed to advance our understanding of human exposures and enable interpretation of these data to catch up to analytical capabilities. The problems defined in this review remain exquisitely difficult to address for chemicals like 2,4-D, with short and variable environmental and physiological half-lives and with exposures impacted by numerous and changing external factors.
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Affiliation(s)
- Judy S LaKind
- f School of Arts and Sciences , University of Pennsylvania , Philadelphia , PA , USA
| | - Carol J Burns
- a LaKind Associates, LLC; Department of Epidemiology and Public Health , University of Maryland School of Medicine , Catonsville , MD , USA
| | | | - Cian O'Mahony
- c Department of Applied Mathematics & Statistics , Johns Hopkins University , Baltimore , MD , USA
| | - Giulia Vilone
- c Department of Applied Mathematics & Statistics , Johns Hopkins University , Baltimore , MD , USA
| | - Annette J Burns
- d Creme Global, Trinity Technology and Enterprise Campus , Grand Canal Quay , Dublin , Ireland
| | - Joshua S Naiman
- e Department of Anthropology , Alma College , Alma , MI , USA
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Namulanda G, Taylor E, Maisonet M, Boyd Barr D, Flanders WD, Olson D, Qualters JR, Vena J, Northstone K, Naeher L. In utero exposure to atrazine analytes and early menarche in the Avon Longitudinal Study of Parents and Children Cohort. ENVIRONMENTAL RESEARCH 2017; 156:420-425. [PMID: 28410519 PMCID: PMC5679269 DOI: 10.1016/j.envres.2017.04.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 03/29/2017] [Accepted: 04/04/2017] [Indexed: 05/06/2023]
Abstract
BACKGROUND Evidence from experimental studies suggests that atrazine and its analytes alter the timing of puberty in laboratory animals. Such associations have not been investigated in humans. OBJECTIVE To determine the association between in utero exposure to atrazine analytes and earlier menarche attainment in a nested case-control study of the population-based Avon Longitudinal Study of Parents and Children. METHODS Cases were girls who reported menarche before 11.5 years while controls were girls who reported menarche at or after 11.5 years. Seven atrazine analyte concentrations were measured in maternal gestational urine samples (sample gestation week median (IQR): 12 (8-17)) during the period 1991-1992, for 174 cases and 195 controls using high performance liquid chromatography-tandem mass spectrometry. We evaluated the study association using multivariate logistic regression, adjusting for potential confounders. We used multiple imputation to impute missing confounder data for 29% of the study participants. RESULTS Diaminochlorotriazine (DACT) was the most frequently detected analyte (58%>limit of detection [LOD]) followed by desethyl atrazine (6%), desethyl atrazine mercapturate (3%), atrazine mercapturate (1%), hydroxyl atrazine (1%), atrazine (1%) and desisopropyl atrazine (0.5%). Because of low detection of other analytes, only DACT was included in the exposure-outcome analyses. The adjusted odds of early menarche for girls with DACT exposures≥median was 1.13 (95% Confidence Interval [95% CI]:0.82, 1.55) and exposure<median was 1.01 (95% CI: 0.73, 1.42) compared to girls with exposure<LOD (reference). In the subset that excluded girls with missing data, the adjusted odds of early menarche for girls with DACT exposures≥median was 1.86 (95% CI: 1.03, 3.38) and exposure<median was 1.26 (95% CI: 0.65, 2.24) compared to the reference. CONCLUSIONS This study is the first to examine the association between timing of menarche and atrazine analytes. We found a weak, non-significant association between in-utero exposure to atrazine metabolite DACT and early menarche, though the association was significant in the subset of girls with complete confounder information. Further exploration of the role of these exposures in female reproduction in other cohorts is needed.
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Affiliation(s)
- Gonza Namulanda
- Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS F-60, Atlanta, GA 30341, USA; College of Public Health, University of Georgia, 105 Spear Rd, Athens, GA 30602, USA.
| | - Ethel Taylor
- Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS F-60, Atlanta, GA 30341, USA
| | - Mildred Maisonet
- College of Public Health, East Tennessee State University, P O Box 70259, Johnson City, TN 37614, USA
| | - Dana Boyd Barr
- Rollins School of Public Health, Emory University, 1518 Clifton Road, Atlanta, GA 30322, USA
| | - W Dana Flanders
- Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS F-60, Atlanta, GA 30341, USA; Rollins School of Public Health, Emory University, 1518 Clifton Road, Atlanta, GA 30322, USA
| | - David Olson
- Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS F-60, Atlanta, GA 30341, USA
| | - Judith R Qualters
- Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS F-60, Atlanta, GA 30341, USA
| | - John Vena
- Department of Public Health Sciences, Medical University of South Carolina, 135 Cannon Street Suite 303, MSC 835, Charleston, SC 29425, USA
| | - Kate Northstone
- NIHR CLAHRC West, School of Social and Community Medicine, University of Bristol, Level 9, Whitefriars, Lewins Mead, Bristol BS1 2NT, United Kingdom
| | - Luke Naeher
- Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS F-60, Atlanta, GA 30341, USA; College of Public Health, University of Georgia, 105 Spear Rd, Athens, GA 30602, USA
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20
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Lerro CC, Beane Freeman LE, Portengen L, Kang D, Lee K, Blair A, Lynch CF, Bakke B, De Roos AJ, Vermeulen RCH. A longitudinal study of atrazine and 2,4-D exposure and oxidative stress markers among iowa corn farmers. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2017; 58:30-38. [PMID: 28116766 PMCID: PMC5763550 DOI: 10.1002/em.22069] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 05/06/2023]
Abstract
Reactive oxygen species, potentially formed through environmental exposures, can overwhelm an organism's antioxidant capabilities resulting in oxidative stress. Long-term oxidative stress is linked with chronic diseases. Pesticide exposures have been shown to cause oxidative stress in vivo. We utilized a longitudinal study of corn farmers and non-farming controls in Iowa to examine the impact of exposure to the widely used herbicides atrazine and 2,4-dichlorophenoxyacetic acid (2,4-D) on markers of oxidative stress. 225 urine samples were collected during five agricultural time periods (pre-planting, planting, growing, harvest, off-season) for 30 farmers who applied pesticides occupationally and 10 controls who did not; all were non-smoking men ages 40-60. Atrazine mercapturate (atrazine metabolite), 2,4-D, and oxidative stress markers (malondialdehyde [MDA], 8-hydroxy-2'-deoxyguanosine [8-OHdG], and 8-isoprostaglandin-F2α [8-isoPGF]) were measured in urine. We calculated β estimates and 95% confidence intervals (95%CI) for each pesticide-oxidative stress marker combination using multivariate linear mixed-effect models for repeated measures. Farmers had higher urinary atrazine mercapturate and 2,4-D levels compared with controls. In regression models, after natural log transformation, 2,4-D was associated with elevated levels of 8-OHdG (β = 0.066, 95%CI = 0.008-0.124) and 8-isoPGF (β = 0.088, 95%CI = 0.004-0.172). 2,4-D may be associated with oxidative stress because of modest increases in 8-OHdG, a marker of oxidative DNA damage, and 8-isoPGF, a product of lipoprotein peroxidation, with recent 2,4-D exposure. Future studies should investigate the role of 2,4-D-induced oxidative stress in the pathogenesis of human diseases. Environ. Mol. Mutagen. 58:30-38, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Catherine C Lerro
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
| | - Laura E Beane Freeman
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
| | - Lützen Portengen
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, 3508, The Netherlands
| | - Daehee Kang
- Seoul National University, Seoul, South Korea
| | - Kyoungho Lee
- Samsung Health Research Institute, Samsung Electronics, Yongin-City, 446-711, South Korea
| | - Aaron Blair
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
| | - Charles F Lynch
- Department of Epidemiology, University of Iowa, Iowa City, Iowa
| | - Berit Bakke
- Department of Occupational Health Surveillance, National Institute of Occupational Health, Oslo, Norway
| | - Anneclaire J De Roos
- Department of Environmental and Occupational Health, Drexel University Dornsife School of Public Health, Philadelphia, Pennsylvania
| | - Roel C H Vermeulen
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, 3508, The Netherlands
- Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, The Netherlands
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Atrazine Exposure and Reproductive Dysfunction through the Hypothalamus-Pituitary-Gonadal (HPG) Axis. TOXICS 2015; 3:414-450. [PMID: 28713818 PMCID: PMC5507375 DOI: 10.3390/toxics3040414] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Endocrine disrupting chemicals (EDC) are exogenous agents that alter endogenous hormone signaling pathways. These chemicals target the neuroendocrine system which is composed of organs throughout the body that work alongside the central nervous system to regulate biological processes. Of primary importance is the hypothalamic-pituitary-gonadal (HPG) axis which is vital for maintaining proper reproductive function. Atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) is a pre-emergent herbicide used to prevent the growth of weeds on various crops. This herbicide is reported to widely contaminate potable water supplies everywhere it is applied. As such, the European Union banned the use of atrazine in 2004. Currently the United States Environmental Protection Agency regulates atrazine at 3 parts per billion (ppb; μg/L) in drinking water, while the World Health Organization recently changed their drinking water guideline to 100 ppb. Atrazine is implicated to be an EDC that alters reproductive dysfunction by targeting the HPG axis. However, questions remain as to the human health risks associated with atrazine exposure with studies reporting mixed results on the ability of atrazine to alter the HPG axis. In this review, the current findings for atrazine’s effects on the HPG axis are examined in mammalian, anuran, and fish models and in epidemiological studies.
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Atrazine Causes Autophagy- and Apoptosis-Related Neurodegenerative Effects in Dopaminergic Neurons in the Rat Nigrostriatal Dopaminergic System. Int J Mol Sci 2015; 16:13490-506. [PMID: 26075868 PMCID: PMC4490505 DOI: 10.3390/ijms160613490] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/30/2015] [Accepted: 06/02/2015] [Indexed: 01/24/2023] Open
Abstract
Atrazine (2-chloro-4-ethytlamino-6-isopropylamine-1,3,5-triazine; ATR) is widely used as a broad-spectrum herbicide. Animal studies have demonstrated that ATR exposure can cause cell death in dopaminergic neurons. The molecular mechanisms underlying ATR-induced neuronal cell death, however, are unknown. In this study, we investigated the autophagy and apoptosis induced by ATR in dopaminergic neurons in vivo. Wistar rats were administered with ATR at doses of 10, 50 and 100 mg/kg body weight by oral gavage for three months. In terms of histopathology, the expression of autophagy- and apoptosis-related genes as well as proteins related to the Beclin-1/B-cell lymphoma 2 (Bcl-2) autophagy and apoptosis pathways were examined in the rat nigrostriatal dopaminergic system. We observed degenerative micromorphology indicative of neuronal apoptosis and mitochondrial autophagy by electron microscopy in ATR-exposed rat striatum. The rat ventral mesencephalon in the ATR-exposed groups also showed increased expression of Beclin-1, LC3-II, Bax and Caspase-9, and decreased expression of tyrosine hydroxylase (TH), Bcl-xl and Bcl-2. These findings indicate that ATR may induce autophagy- and apoptosis-related changes in doparminergic neurons. Furthermore, this induction may be regulated by the Beclin-1 and Bcl-2 autophagy and apoptosis pathways, and this may help to better understand the mechanism underlying the neurotoxicity of ATR.
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Ma K, Wu HY, Zhang B, He X, Li BX. Neurotoxicity effects of atrazine-induced SH-SY5Y human dopaminergic neuroblastoma cells via microglial activation. MOLECULAR BIOSYSTEMS 2015; 11:2915-24. [DOI: 10.1039/c5mb00432b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Atrazine (2-chloro-4-ethytlamino-6-isopropylamine-1,3,5-triazine; ATR) is a broad-spectrum herbicide with a wide range of applications worldwide.
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Affiliation(s)
- Kun Ma
- Department of Hygienic Toxicology
- Public Health College
- Harbin Medical University
- Harbin
- P. R. China
| | - Hao-Yu Wu
- Department of Hygienic Toxicology
- Public Health College
- Harbin Medical University
- Harbin
- P. R. China
| | - Bo Zhang
- Department of Hygienic Toxicology
- Public Health College
- Harbin Medical University
- Harbin
- P. R. China
| | - Xi He
- Department of Hygienic Toxicology
- Public Health College
- Harbin Medical University
- Harbin
- P. R. China
| | - Bai-Xiang Li
- Department of Hygienic Toxicology
- Public Health College
- Harbin Medical University
- Harbin
- P. R. China
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Zhang B, Ma K, Li B. Inflammatory reaction regulated by microglia plays a role in atrazine-induced dopaminergic neuron degeneration in the substantia nigra. J Toxicol Sci 2015; 40:437-50. [DOI: 10.2131/jts.40.437] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Bo Zhang
- Department of Toxicology, School of Public Health, Harbin Medical University, China
| | - Kun Ma
- Department of Toxicology, School of Public Health, Harbin Medical University, China
| | - Baixiang Li
- Department of Toxicology, School of Public Health, Harbin Medical University, China
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Repeated exposure to the herbicide atrazine alters locomotor activity and the nigrostriatal dopaminergic system of the albino rat. Neurotoxicology 2012; 34:82-94. [PMID: 23123945 DOI: 10.1016/j.neuro.2012.10.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 10/23/2012] [Accepted: 10/24/2012] [Indexed: 11/23/2022]
Abstract
Atrazine (ATR) is used as a pre- and post-emergent herbicide; although banned in several countries of the European Community, it is still used extensively around the world. A recent study in rats has shown that chronic, daily exposure to 10 mg ATR/kg BW causes hyperactivity, disrupts motor coordination and learning of behavioral tasks, and decreases dopamine levels in the brain. In order to evaluate the short-term effect of ATR exposure on locomotor activity, monoamine markers, and antioxidants, adult male Sprague-Dawley rats received six IP injections of 100 mg ATR/kg BW or vehicle over two weeks. After every ATR injection we found hypoactivity that lasted up to five days, and it was accompanied by reductions in levels of striatal DA, DOPAC, and HVA without any alteration in the striatal expression of the mRNAs for Mn-SOD, Trx-1, DAR-D(1), or DAR-D(2). In contrast, in the nucleus accumbens no changes in monoamine markers were observed, and a down-regulation of Trx-1 expression was detected shortly after the ATR treatment. Moreover, in the ventral midbrain, we found that ATR induced a down-regulation of mRNA for Th and DAT, but it increased VMAT2 mRNA expression. Decreases of monoamine levels and of locomotor activity disappeared three months after ATR treatment; however, an amphetamine challenge (1 mg/kg) given two months after the ATR treatment resulted in a significant stimulation in the exposed group, revealing hidden effects of ATR on dopaminergic systems. These results indicate that ATR exposure differentially modifies the dopaminergic systems, and these modifications may underlie the behavioral changes observed.
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Abstract
A qualitative review of the epidemiological literature on the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) and health after 2001 is presented. In order to compare the exposure of the general population, bystanders and occupational groups, their urinary levels were also reviewed. In the general population, 2,4-D exposure is at or near the level of detection (LOD). Among individuals with indirect exposure, i.e. bystanders, the urinary 2,4-D levels were also very low except in individuals with opportunity for direct contact with the herbicide. Occupational exposure, where exposure was highest, was positively correlated with behaviors related to the mixing, loading and applying process and use of personal protection. Information from biomonitoring studies increases our understanding of the validity of the exposure estimates used in epidemiology studies. The 2,4-D epidemiology literature after 2001 is broad and includes studies of cancer, reproductive toxicity, genotoxicity, and neurotoxicity. In general, a few publications have reported statistically significant associations. However, most lack precision and the results are not replicated in other independent studies. In the context of biomonitoring, the epidemiology data give no convincing or consistent evidence for any chronic adverse effect of 2,4-D in humans.
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Affiliation(s)
- Carol J Burns
- Department of Epidemiology, The Dow Chemical Company, Midland, MI 48671, USA.
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Mendaš G, Vuletić M, Galić N, Drevenkar V. Urinary metabolites as biomarkers of human exposure to atrazine: Atrazine mercapturate in agricultural workers. Toxicol Lett 2012; 210:174-81. [DOI: 10.1016/j.toxlet.2011.11.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 11/14/2011] [Accepted: 11/21/2011] [Indexed: 10/14/2022]
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Chevrier C, Limon G, Monfort C, Rouget F, Garlantézec R, Petit C, Durand G, Cordier S. Urinary biomarkers of prenatal atrazine exposure and adverse birth outcomes in the PELAGIE birth cohort. ENVIRONMENTAL HEALTH PERSPECTIVES 2011; 119:1034-41. [PMID: 21367690 PMCID: PMC3222984 DOI: 10.1289/ehp.1002775] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Accepted: 03/02/2011] [Indexed: 05/02/2023]
Abstract
BACKGROUND Despite evidence of atrazine toxicity in developing organisms from experimental studies, few studies--and fewer epidemiologic investigations--have examined the potential effects of prenatal exposure. OBJECTIVES We assessed the association between adverse birth outcomes and urinary biomarkers of prenatal atrazine exposure, while taking into account exposures to other herbicides used on corn crops (simazine, alachlor, metolachlor, and acetochlor). METHODS This study used a case-cohort design nested in a prospective birth cohort conducted in the Brittany region of France from 2002 through 2006. We collected maternal urine samples to examine pesticide exposure biomarkers before the 19th week of gestation. RESULTS We found quantifiable levels of atrazine or atrazine mercapturate in urine samples from 5.5% of 579 pregnant women, and dealkylated and identified hydroxylated triazine metabolites in 20% and 40% of samples, respectively. The presence versus absence of quantifiable levels of atrazine or a specific atrazine metabolite was associated with fetal growth restriction [odds ratio (OR) = 1.5; 95% confidence interval (CI), 1.0-2.2] and small head circumference for sex and gestational age (OR = 1.7; 95% CI, 1.0-2.7). Associations with major congenital anomalies were not evident with atrazine or its specific metabolites. Head circumference was inversely associated with the presence of quantifiable urinary metolachlor. CONCLUSIONS This study is the first to assess associations of birth outcomes with multiple urinary biomarkers of exposure to triazine and chloroacetanilide herbicides. Evidence of associations with adverse birth outcomes raises particular concerns for countries where atrazine is still in use.
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Hines CJ, Deddens JA, Coble J, Kamel F, Alavanja MCR. Determinants of captan air and dermal exposures among orchard pesticide applicators in the Agricultural Health Study. ACTA ACUST UNITED AC 2011; 55:620-33. [PMID: 21427168 DOI: 10.1093/annhyg/mer008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVES To identify and quantify determinants of captan exposure among 74 private orchard pesticide applicators in the Agricultural Health Study (AHS). To adjust an algorithm used for estimating pesticide exposure intensity in the AHS based on these determinants and to compare the correlation of the adjusted and unadjusted algorithms with urinary captan metabolite levels. METHODS External exposure metrics included personal air, hand rinse, and dermal patch samples collected from each applicator on 2 days in 2002-2003. A 24-h urine sample was also collected. Exposure determinants were identified for each external metric using multiple linear regression models via the NLMIXED procedure in SAS. The AHS algorithm was adjusted, consistent with the identified determinants. Mixed-effect models were used to evaluate the correlation between the adjusted and unadjusted algorithm and urinary captan metabolite levels. RESULTS Consistent determinants of captan exposure were a measure of application size (kilogram of captan sprayed or application method), wearing chemical-resistant (CR) gloves and/or a coverall/suit, repairing spray equipment, and product formulation. Application by airblast was associated with a 4- to 5-fold increase in exposure as compared to hand spray. Exposure reduction to the hands, right thigh, and left forearm from wearing CR gloves averaged ∼80%, to the right and left thighs and right forearm from wearing a coverall/suit by ∼70%. Applicators using wettable powder formulations had significantly higher air, thigh, and forearm exposures than those using liquid formulations. Application method weights in the AHS algorithm were adjusted to nine for airblast and two for hand spray; protective equipment reduction factors were adjusted to 0.2 (CR gloves), 0.3 (coverall/suit), and 0.1 (both). CONCLUSIONS Adjustment of application method, CR glove, and coverall weights in the AHS algorithm based on our exposure determinant findings substantially improved the correlation between the AHS algorithm and urinary metabolite levels.
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Affiliation(s)
- Cynthia J Hines
- National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Cincinnati, OH 45226, USA.
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Ward EM, Schulte PA, Straif K, Hopf NB, Caldwell JC, Carreón T, DeMarini DM, Fowler BA, Goldstein BD, Hemminki K, Hines CJ, Pursiainen KH, Kuempel E, Lewtas J, Lunn RM, Lynge E, McElvenny DM, Muhle H, Nakajima T, Robertson LW, Rothman N, Ruder AM, Schubauer-Berigan MK, Siemiatycki J, Silverman D, Smith MT, Sorahan T, Steenland K, Stevens RG, Vineis P, Zahm SH, Zeise L, Cogliano VJ. Research recommendations for selected IARC-classified agents. ENVIRONMENTAL HEALTH PERSPECTIVES 2010; 118:1355-62. [PMID: 20562050 PMCID: PMC2957912 DOI: 10.1289/ehp.0901828] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Accepted: 06/18/2010] [Indexed: 05/10/2023]
Abstract
OBJECTIVES There are some common occupational agents and exposure circumstances for which evidence of carcinogenicity is substantial but not yet conclusive for humans. Our objectives were to identify research gaps and needs for 20 agents prioritized for review based on evidence of widespread human exposures and potential carcinogenicity in animals or humans. DATA SOURCES For each chemical agent (or category of agents), a systematic review was conducted of new data published since the most recent pertinent International Agency for Research on Cancer (IARC) Monograph meeting on that agent. DATA EXTRACTION Reviewers were charged with identifying data gaps and general and specific approaches to address them, focusing on research that would be important in resolving classification uncertainties. An expert meeting brought reviewers together to discuss each agent and the identified data gaps and approaches. DATA SYNTHESIS Several overarching issues were identified that pertained to multiple agents; these included the importance of recognizing that carcinogenic agents can act through multiple toxicity pathways and mechanisms, including epigenetic mechanisms, oxidative stress, and immuno- and hormonal modulation. CONCLUSIONS Studies in occupational populations provide important opportunities to understand the mechanisms through which exogenous agents cause cancer and intervene to prevent human exposure and/or prevent or detect cancer among those already exposed. Scientific developments are likely to increase the challenges and complexities of carcinogen testing and evaluation in the future, and epidemiologic studies will be particularly critical to inform carcinogen classification and risk assessment processes.
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Affiliation(s)
- Elizabeth M Ward
- Epidemiology and Surveillance Research, American Cancer Society, Atlanta Georgia 30303, USA.
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Freeman LB. Evaluation of agricultural exposures: the Agricultural Health Study and the Agricultural Cohort Consortium. REVIEWS ON ENVIRONMENTAL HEALTH 2009; 24:311-8. [PMID: 20384039 PMCID: PMC3059507 DOI: 10.1515/reveh.2009.24.4.311] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- Laura Beane Freeman
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, 6120 Executive Boulevard, Room 8112, MS 7240, Bethesda 20892, Maryland, USA
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Blair A, Freeman LB. Epidemiologic studies in agricultural populations: observations and future directions. J Agromedicine 2009; 14:125-31. [PMID: 19437268 DOI: 10.1080/10599240902779436] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This paper reviews epidemiologic studies of cancer among agricultural populations to identify possible associations and to provide a focus for future investigations. Meta-analyses of mortality surveys of farmers find excesses of several cancers, including connective tissue, non-Hodgkin's lymphoma, Hodgkin's disease, multiple myeloma and cancers of the skin, stomach, and brain, and deficits for total mortality, heart disease, total cancer, and cancers of the esophagus, colon, lung, and bladder. Meta-analyses of studies of individual cancers also support these findings, indicating a need to identify exposures and lifestyle factors that might account for this mortality pattern. Although cancer studies of other occupations that might have pesticide exposures in common with farmers show some similarities with observations among farmers, the overall patterns are quite different. This suggests that pesticides are not likely to fully explain the cancer and other disease patterns observed among farmers. Because exposures vary by type of farm operation, exposures for individual farmers can differ considerably. Studies in the future need to focus on the full range of exposures to fully understand the cancer pattern in farmers.
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Affiliation(s)
- Aaron Blair
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland 20892, USA.
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