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Abarikwu SO, Ezim OE, Ikeji CN, Farombi EO. Atrazine: cytotoxicity, oxidative stress, apoptosis, testicular effects and chemopreventive Interventions. FRONTIERS IN TOXICOLOGY 2023; 5:1246708. [PMID: 37876981 PMCID: PMC10590919 DOI: 10.3389/ftox.2023.1246708] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 09/19/2023] [Indexed: 10/26/2023] Open
Abstract
Atrazine (ATZ) is an environmental pollutant that interferes with several aspects of mammalian cellular processes including germ cell development, immunological, reproductive and neurological functions. At the level of human exposure, ATZ reduces sperm count and contribute to infertility in men. ATZ also induces morphological changes similar to apoptosis and initiates mitochondria-dependent cell death in several experimental models. When in vitro experimental models are exposed to ATZ, they are faced with increased levels of reactive oxygen species (ROS), cytotoxicity and decreased growth rate at dosages that may vary with cell types. This results in differing cytotoxic responses that are influenced by the nature of target cells, assay types and concentrations of ATZ. However, oxidative stress could play salient role in the observed cellular and genetic toxicity and apoptosis-like effects which could be abrogated by antioxidant vitamins and flavonoids, including vitamin E, quercetin, kolaviron, myricetin and bioactive extractives with antioxidant effects. This review focuses on the differential responses of cell types to ATZ toxicity, testicular effects of ATZ in both in vitro and in vivo models and chemopreventive strategies, so as to highlight the current state of the art on the toxicological outcomes of ATZ exposure in several experimental model systems.
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Affiliation(s)
- Sunny O. Abarikwu
- Reproductive Biology and Molecular Toxicology Research Group, Department of Biochemistry, University of Port Harcourt, Choba, Nigeria
| | - Ogechukwu E. Ezim
- Reproductive Biology and Molecular Toxicology Research Group, Department of Biochemistry, University of Port Harcourt, Choba, Nigeria
| | - Cynthia N. Ikeji
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ebenezer O. Farombi
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
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Petrova E, Meierdierks J, Finkel M, Grathwohl P. Legacy pollutants in fractured aquifers: Analytical approximations for back diffusion to predict atrazine concentrations under uncertainty. JOURNAL OF CONTAMINANT HYDROLOGY 2023; 255:104161. [PMID: 36870120 DOI: 10.1016/j.jconhyd.2023.104161] [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: 11/23/2022] [Revised: 02/05/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
We present novel analytical approximations for the estimation of travel distance and relative height of solute concentration peaks within a single fracture system for pollutants that have been temporarily applied at a constant rate in the past. These approximations are used to investigate the spatiotemporal evolution of the concentration of atrazine, as an example for many other so-called legacy compounds that are still found in the groundwater of fractured rock aquifers even decades after their application has stopped. This is done in a stochastic framework to account for the uncertainty in relevant parameters, focusing on probabilities of exceeding the given legal concentration limit and the expected length of the recovery period. We specifically consider the properties of the Muschelkalk limestone aquifer in the Ammer river catchment in SW Germany, and the three major types of carbonate rock facies: Shoal, Tempestite, and Basinal limestones. Atrazine sorption parameters have been determined in laboratory experiments. The simulations confirm that diffusion-limited sorption and desorption may cause considerable atrazine levels long after application stop. For the properties of the considered rock facies types, and corresponding parameter ranges, atrazine concentration above the legal limit is supposed to be limited to locations referring to only a few years of travel time. If the concentration exceeds the legal limit by the year 2022, it will take decades to centuries until recovery.
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Affiliation(s)
- Elena Petrova
- Department of Geosciences, University of Tübingen, Schnarrenbergstr. 94-96, 72076 Tübingen, Germany.
| | - Jana Meierdierks
- Department of Geosciences, University of Tübingen, Schnarrenbergstr. 94-96, 72076 Tübingen, Germany
| | - Michael Finkel
- Department of Geosciences, University of Tübingen, Schnarrenbergstr. 94-96, 72076 Tübingen, Germany
| | - Peter Grathwohl
- Department of Geosciences, University of Tübingen, Schnarrenbergstr. 94-96, 72076 Tübingen, Germany.
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Silva M, Kwok RKH. Use of computational toxicology models to predict toxicological points of departure: A case study with triazine herbicides. Birth Defects Res 2023; 115:525-544. [PMID: 36584090 DOI: 10.1002/bdr2.2144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 12/31/2022]
Abstract
BACKGROUND Atrazine simazine and propazine, widely used triazine herbicides on food crops and in residential areas, disrupt the neuroendocrine system raising human health concerns. USEPA developed a PBPK model based on triazine common Mode of Action (MOA)-suppression of luteinizing hormone surge in female rats-to generate human regulatory points of departure (POD: mg/kg/day). We compared triazine Human Administered Equivalent Dose (AEDHuman mg/kg/day) predictions from open access computational tools to the PBPK PODs to assess concordance. METHODS Computational tools were the following: ToxCast/Tox21 in vitro assays; Toxicogenomic databases to assess concordance with ToxCast/Tox21 targets; integrated chemical environment (ICE) models with ToxCast/Tox21 inputs to predict AEDHuman PODs and population-based age-refined high throughput toxicokinetics (HTTK-Pop) to compare to age-related PBPK PODs. RESULTS ToxCast/Tox21 assays identified critical targets in the triazine common MOA and gene databases; ICE AEDHuman predictions were mainly concordant with the USEPA PBPK PODs quantitatively. Low fold-differences between PBPK POD and ICE AEDHuman predictions indicated that the ICE models are health-protective. HTTK-Pop age-refinements were within 10-fold of the USEPA PBPK PODs. CONCLUSIONS CompTox tools were used to identify assay targets in the MOA and identify potential molecular initiating targets in the adverse outcome pathway for potential use in risk assessment.
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Affiliation(s)
- Marilyn Silva
- Retired from the California Environmental Protection Agency, Sacramento, California, USA
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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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Karadayian AG, Paez B, Bustamante J, Lores-Arnaiz S, Czerniczyniec A. Mitochondrial dysfunction due to in vitro exposure to atrazine and its metabolite in striatum. J Biochem Mol Toxicol 2023; 37:e23232. [PMID: 36181348 DOI: 10.1002/jbt.23232] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 07/28/2022] [Accepted: 09/16/2022] [Indexed: 01/18/2023]
Abstract
Atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) has been described as a potential toxic for dopaminergic metabolism both in vivo and in vitro. Its main metabolite diamino-chloro triazine (DACT) has been shown to achieve higher levels in brain tissue than atrazine. The aim of this study was to evaluate the in vitro effects of atrazine and DACT on striatal mitochondrial function, active oxygen species generation, and nitric oxide (NO) content. Incubation of mitochondria with atrazine (10 µM) was not able to modify oxygen consumption. However, a 50% increase in malate-glutamate state 4 respiratory rates was observed after DACT treatment (100 µM) without changes in respiratory state 3. Atrazine was able to inhibit complex I-III activity by 30% and DACT induced a tendency to decrease by 17% in the striatum. Regarding reactive oxygen species (ROS), DACT increased H2 O2 production by 43%. Also, superoxide anion levels were higher (14%) after atrazine exposure than in control mitochondria. Incubation of striatal mitochondria with atrazine and DACT induced membrane depolarization by 15% and 19%, respectively. Also, atrazine increased NO content by 10% but no significant changes were observed after exposure of mitochondria to DACT. Glutathione peroxidase activity was inhibited (56%) by DACT and atrazine inhibited superoxide dismutase activity by 60%. Also, cardiolipin oxidation (15%) was observed after atrazine treatment. Summing up, the obtained results suggest that in vitro atrazine and DACT induce ROS production affecting striatal mitochondrial function. The atrazine effects would be attributed to a direct effect on the mitochondrial respiratory chain and superoxide dismutase activity while DACT appears to disturb glutathione-related enzyme system.
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Affiliation(s)
- Analía G Karadayian
- Facultad de Farmacia y Bioquímica, Fisicoquímica, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Bioquímica y Medicina Molecular (IBIMOL), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Bárbara Paez
- Facultad de Farmacia y Bioquímica, Fisicoquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Juanita Bustamante
- Facultad de Farmacia y Bioquímica, Fisicoquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Silvia Lores-Arnaiz
- Facultad de Farmacia y Bioquímica, Fisicoquímica, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Bioquímica y Medicina Molecular (IBIMOL), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Analía Czerniczyniec
- Facultad de Farmacia y Bioquímica, Fisicoquímica, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Bioquímica y Medicina Molecular (IBIMOL), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
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New evidence for deleterious effects of environmental contaminants on the male gamete. Anim Reprod Sci 2022; 246:106886. [PMID: 34774338 DOI: 10.1016/j.anireprosci.2021.106886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 12/14/2022]
Abstract
The decreasing trend in human and domestic animal fertility in recent decades has resulted in the question of whether reduced sperm quality is associated with changes in global climate and the environment. Proposed causes for reduced sperm quality include environmental contaminants, which enter into the body of animals through the food chain and are transported to the reproductive tract, where contaminating agents can have effects on fertilization capacities of gametes. In this review, there is a focus on various environmental contaminants and potential effects on male fertility. Human-derived contaminants, particularly endocrine-disrupting phthalates and the pesticide atrazine, are discussed. Naturally occurring toxins are also addressed, in particular mycotoxins such as aflatoxin which can be components in food consumed by humans and animals. Mechanisms by which environmental contaminants reduce male fertility are not clearly defined; however, are apparently multifactorial (i.e., direct and indirect effects) with there being diverse modes of action. Results from studies with humans, rodents and domestic animals indicate there are deleterious effects of contaminants on male gametes at various stages of spermatogenesis (i.e., in the testis) during passage through the epididymis, and in mature spermatozoa, after ejaculation and during capacitation. Considering there is never detection of a single contaminant, this review addresses synergistic or additive effects of combinations of contaminants. There is new evidence highlighted for the long-lasting effects of environmental contaminants on spermatozoa and developing embryos. Understanding the risk associated with environmental contaminants for animal reproduction may lead to new management strategies, thereby improving reproductive processes.
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Zhu SY, Li XN, Zhao Y, Dai XY, Guo JY, Li JL. Lycopene Ameliorate Atrazine-Induced Oxidative Damage in the B Cell Zone via Targeting the miR-27a-3p/Foxo1 Axis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:12502-12512. [PMID: 36134885 DOI: 10.1021/acs.jafc.2c05103] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Lycopene, a natural bioactive component, has potential to reduce the risk of environmental factors inducing chronic diseases. It is important to explore lycopene's health benefits and its mechanism. The uncontrolled use of atrazine in agriculture causes critical environmental pollution issues worldwide. Exposure to atrazine through water and food chains is a risk to humans. In this study, mice were orally treated with lycopene and/or different concentrations of atrazine for 21 days to explore the influence of atrazine on the spleen and the role of lycopene's protection in atrazine exposure. The work found that atrazine exerted its toxic role in the B cell zone of the spleen by inducing Foxo1 deficiency. Atrazine caused ROS generation and Pink1/Parkin dysfunction via inducing Foxo1 deficiency, which led to apoptosis in the B cell zone. Additionally, the work revealed that lycopene ameliorates atrazine-induced apoptosis in the B cell zone of the spleen via regulating the miR-27a-3p/Foxo1 pathway. The finding also underscored a novel target of lycopene in maintaining homeostasis during B cell maturation.
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Affiliation(s)
| | | | | | - Xue-Yan Dai
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China
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Atrazine Exposure Induces Hepatic Metabolism Disorder in Male Adult Zebrafish. TOXICS 2022; 10:toxics10070400. [PMID: 35878305 PMCID: PMC9323832 DOI: 10.3390/toxics10070400] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 02/01/2023]
Abstract
Atrazine (ATZ) is a herbicide used in agricultural production and has been detected in surface water due to its widespread use worldwide. This may pose a threat to the health of aquatic animals. To explore the ATZ−induced hepatic metabolism disorder, male zebrafish were exposed to 300 and 1000 μg/L ATZ for 21 days, respectively. The results revealed that ATZ exposure significantly reduced hepatic triglyceride (TG) levels, while significantly (p < 0.05) increased pyruvate (PYR) and total cholesterol (TC) levels. In addition, the liver sample from the 1000 μg/L ATZ−treated group was used for GC/MS metabolomic analysis. The principal component analysis (PCA) model showed significant separation of the 1000 μg/L ATZ group from the control group, indicating that ATZ exposure altered hepatic metabolism in male adult zebrafish. A total of 29 significantly (p < 0.05) different metabolites were observed and identified in the ATZ−treated group. Moreover, the most disturbed pathways by ATZ were the arginine and proline metabolic pathways, followed by the glutathione metabolic pathway. Three and two metabolites were significantly altered in the arginine and proline metabolic pathways and glutathione metabolic pathway, respectively. Based on these results, we suggested that ATZ was capable of altering liver metabolism in zebrafish and that its ecological risk to aquatic organisms cannot be ignored.
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Zhu SY, Li CX, Tong YX, Xu YR, Wang ZY, Li JL. IL-6/STAT3/Foxo1 Axis as a Target of Lycopene Ameliorates Atrazine-Induced Thymic Mitophagy and Pyroptosis Cross-talk. Food Funct 2022; 13:8871-8879. [DOI: 10.1039/d2fo01497a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intensive adoption of atrazine (ATZ) has been a persistently widespread pollutant in daily life. However, ATZ is still used as an essential herbicide in numerous countries because its toxic...
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10
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Stradtman SC, Freeman JL. Mechanisms of Neurotoxicity Associated with Exposure to the Herbicide Atrazine. TOXICS 2021; 9:207. [PMID: 34564358 PMCID: PMC8473009 DOI: 10.3390/toxics9090207] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/20/2021] [Accepted: 08/29/2021] [Indexed: 12/19/2022]
Abstract
Atrazine is an herbicide commonly used on crops to prevent broadleaf weeds. Atrazine is an endocrine-disrupting chemical mainly targeting the neuroendocrine system and associated axes, especially as a reproductive toxicant through attenuation of the luteinizing hormone (LH). Current regulatory levels for chronic exposure are based on no observed adverse effect levels (NOAELs) of these LH alterations in rodent studies. Atrazine has also been studied for its effects on the central nervous system and neurotransmission. The European Union (EU) recognized the health risks of atrazine exposure as a public health concern with no way to contain contamination of drinking water. As such, the EU banned atrazine use in 2003. The United States recently reapproved atrazine's use in the fall of 2020. Research has shown that there is a wide array of adverse health effects that are seen across multiple models, exposure times, and exposure periods leading to dysfunction in many different systems in the body with most pointing to a neuroendocrine target of toxicity. There is evidence of crosstalk between systems that can be affected by atrazine exposure, causing widespread dysfunction and leading to changes in behavior even with no direct link to the hypothalamus. The hypothetical mechanism of toxicity of atrazine endocrine disruption and neurotoxicity can therefore be described as a web of pathways that are influenced through changes occurring in each and their multiple feedback loops with further research needed to refine NOAELs for neurotoxic outcomes.
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Affiliation(s)
| | - Jennifer L. Freeman
- School of Health Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, USA;
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Macêdo AKS, de Melo Costa P, Salgado MAR, de Ribeiro RIMA, Dos Santos HB, Thomé RG. Can the exposure system adopted influence the results of the atrazine toxicity in hepatic tissue of fish? JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2021; 335:512-521. [PMID: 33949805 DOI: 10.1002/jez.2471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 03/17/2021] [Accepted: 04/20/2021] [Indexed: 11/06/2022]
Abstract
The widespread use of atrazine, a herbicide used to control weeds, has contributed to the increased contamination of aquatic environments. To assess the toxicological effects of a xenobiotic on a nontarget organism in the laboratory, different models of toxicological exposure systems have been widely used. Therefore, the aim of this study was to evaluate and compare the action of sublethal concentrations of atrazine on the hepatic histology of Oreochromis niloticus, considering two models of exposure: static (where atrazine was only added once) and semi-static (where atrazine was periodically renewed). Fish were exposed to a concentration of 2 ppm atrazine for 15 days, which was verified by high-performance liquid chromatography. The livers were stained with hematoxylin and eosin and histopathological data were collected. In addition, they were submitted to immunohistochemistry for inducible nitric oxide synthase (iNOS). A maximum variation of 45% (static) and 12.5% (semi-static) was observed between the observed and nominal atrazine concentration. Nuclear and cytoplasmic changes were observed in both experimental models. Hepatocytes from the livers of the static system showed a degenerative appearance, while in the semi-static system, intense cytoplasmic vacuolization and necrosis were observed. iNOS positive cells were identified only in macrophages in the hepatocytes of fish in the semi-static system. These results directly showed how the choice of exposure system can influence the results of toxicological tests. However, future analysis investigating the by-products and nitrogen products should be carried out since the histopathological findings revealed the possibility of these compounds serving as secondary contamination routes.
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Affiliation(s)
- Anderson K S Macêdo
- Laboratório de Processamento de Tecidos - LAPROTEC, Universidade Federal de São João Del Rei, Divinópolis, Minas Gerais, Brazil
| | - Pauliane de Melo Costa
- Laboratório de Processamento de Tecidos - LAPROTEC, Universidade Federal de São João Del Rei, Divinópolis, Minas Gerais, Brazil
| | - Mariana A R Salgado
- Laboratório de Processamento de Tecidos - LAPROTEC, Universidade Federal de São João Del Rei, Divinópolis, Minas Gerais, Brazil
| | - Rosy I M A de Ribeiro
- Laboratório de Patologia Experimental - LAPATEX, Universidade Federal de São João Del Rei, Divinópolis, Minas Gerais, Brazil
| | - Hélio B Dos Santos
- Laboratório de Processamento de Tecidos - LAPROTEC, Universidade Federal de São João Del Rei, Divinópolis, Minas Gerais, Brazil
| | - Ralph G Thomé
- Laboratório de Processamento de Tecidos - LAPROTEC, Universidade Federal de São João Del Rei, Divinópolis, Minas Gerais, Brazil
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Wang GH, Dittmer J, Douglas B, Huang L, Brucker RM. Coadaptation between host genome and microbiome under long-term xenobiotic-induced selection. SCIENCE ADVANCES 2021; 7:7/19/eabd4473. [PMID: 33952510 PMCID: PMC8099182 DOI: 10.1126/sciadv.abd4473] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 03/16/2021] [Indexed: 05/26/2023]
Abstract
One of the most difficult experimental challenges today is testing the evolutionary dynamics shaping complex host-microbiome interactions. We investigated host-microbiome codiversification in response to xenobiotic-induced selection using an experimental evolution approach. To this end, we exposed the parasitoid wasp Nasonia vitripennis to sublethal concentrations of the widely used herbicide atrazine for 85 generations. Our results reveal that atrazine exposure not only mediated adaptive changes within the microbiome, which conferred host resistance to atrazine toxicity, but also exerted selective pressure on the host genome and altered host gene expression and immune response. Furthermore, microbiome transplant experiments reveal a decreased survival of adults from the control population after exposure to the evolved microbiome of the atrazine-exposed population, while no such decrease occurred in the reciprocal transplant. These results indicate that xenobiotic-induced selection mediated host-microbiome coadaptation, ultimately leading to a new host genome-microbiome equilibrium.
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Affiliation(s)
- Guan-Hong Wang
- Rowland Institute at Harvard University, Cambridge, MA 02142, USA
| | - Jessica Dittmer
- Dipartimento di Scienze Agrarie e Ambientali (DISAA), Università degli Studi di Milano, Via Celoria 2, Milano 20133, Italy
| | - Brecia Douglas
- Rowland Institute at Harvard University, Cambridge, MA 02142, USA
| | - Long Huang
- Shanghai Majorbio Bio-pharm Technology Co., Pudong New Area, Shanghai 201321, China
| | - Robert M Brucker
- Rowland Institute at Harvard University, Cambridge, MA 02142, USA.
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Ahkin Chin Tai JK, Horzmann KA, Franco J, Jannasch AS, Cooper BR, Freeman JL. Developmental atrazine exposure in zebrafish produces the same major metabolites as mammals along with altered behavioral outcomes. Neurotoxicol Teratol 2021; 85:106971. [PMID: 33713789 DOI: 10.1016/j.ntt.2021.106971] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/23/2022]
Abstract
Atrazine (ATZ) is the second most commonly applied agricultural herbicide in the United States. Due to contamination concerns, the U.S. EPA has set the maximum contaminant level in potable water sources at 3 parts per billion (ppb; μg/l). Depending on the time of year and sampling location, water sources often exceed this limit. ATZ is an endocrine disrupting chemical in multiple species observed to target the neuroendocrine system. In this study the zebrafish vertebrate model was used to test the hypothesis that a developmental ATZ exposure generates metabolites similar to those found in mammals and alters morphology and behavior in developing larvae. Adult AB zebrafish were bred, embryos were collected, and exposed to 0, 0.3, 3, or 30 ppb ATZ from 1 to 120 h post fertilization (hpf). Targeted metabolomic analysis found that zebrafish produce the same major ATZ metabolites as mammals: desethyl atrazine (DEA), deisopropyl atrazine (DIA), and diaminochloroatrazine (DACT). The visual motor response test at 120 hpf detected hyperactivity in larvae in the 0.3 ppb treatment group and hypoactivity in the 30 ppb treatment group (p < 0.05). Further analysis into behavior during the dark and light phases showed zebrafish larvae exposed to 0.3 ppb ATZ had an increase in total distance moved in the first light phase and time spent moving in the first dark and light phases (p < 0.05). Alternatively, a decrease in total distance moved was observed in the second and third dark phases in zebrafish exposed to 30 ppb ATZ (p < 0.05). No significant differences were observed for any of the morphological measurements following ATZ exposure from 1 to 120 hpf (p > 0.05). These findings suggest that a ATZ exposure during early development generates metabolite profiles similar to mammals and leads to behavioral alterations supporting ATZ as a neurodevelopmental toxicant.
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Affiliation(s)
| | | | - Jackeline Franco
- Metabolite Profiling Facility, Bindley Bioscience Center, Purdue University, West Lafayette, IN, USA
| | - Amber S Jannasch
- Metabolite Profiling Facility, Bindley Bioscience Center, Purdue University, West Lafayette, IN, USA
| | - Bruce R Cooper
- Metabolite Profiling Facility, Bindley Bioscience Center, Purdue University, West Lafayette, IN, USA
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Nwani CD, Ejere VC, Madu JC. Toxicity and genotoxic evaluations in African catfish Clarias gariepinus (Burchell 1822) exposed to Act Force Gold ®, Butaforce ®, and Atraforce ®. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:262-269. [PMID: 32812158 DOI: 10.1007/s11356-020-10525-5] [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: 05/10/2020] [Accepted: 08/13/2020] [Indexed: 06/11/2023]
Abstract
Act Force Gold®, Butaforce®, and Atraforce® are among the most commonly used pesticides in Nigeria. The lethal concentrations and the respective toxic units for the three pesticides were determined. The genotoxic effects of the three pesticides were investigated in the red blood cells of Clarias gariepinus using micronucleus (MN) assay. The 96 h LC50 was 4.75, 4.84, and 54.74 mg L-1 for Act Force Gold®, Butaforce®, and Atraforce®, respectively. The toxic units in ascending order of toxicity were 1.83, 20.66, and 21.05 for Act Force Gold®, Butaforce®, and Atraforce® respectively. The estimated safe levels based on NAS/NAE varied from 4.75 × 10-1-4.75 × 10-5 in Act Force Gold® through 4.64 × 10-1-4.85 × 10-5 in Butaforce® to 5.74-5.74 × 10-5 in Atraforce®. Fish specimens were exposed to the pesticides and sampling was done at regular intervals at days 1, 7, 14, and 21 and after another 7-day recovery period. The results obtained indicated concentration- and duration-dependent increase in % MN formation with maximum values of 3.40 ± 0.25 for Act Force Gold® on day 14 and 3.05 ± 0.36 and 2.35 ± 0.14 for Butaforce® and Atraforce® respectively on day 7 of exposure. The 7-day recovery period could not reverse the trend as the % MN values obtained were significantly different from the control. The results further support the use of MN assay in assessing the toxicity of aquatic pollutants and can be used in the monitoring of aquatic ecosystems.
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Affiliation(s)
| | - Vincent Chikwendu Ejere
- Department of Zoology and Environmental Biology, University of Nigeria Nsukka, Nsukka, Nigeria
| | - Josephine Chinenye Madu
- Department of Zoology and Environmental Biology, University of Nigeria Nsukka, Nsukka, Nigeria
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15
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Roth Z, Komsky-Elbaz A, Kalo D. Effect of environmental contamination on female and male gametes - A lesson from bovines. Anim Reprod 2020; 17:e20200041. [PMID: 33029217 PMCID: PMC7534576 DOI: 10.1590/1984-3143-ar2020-0041] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Endocrine-disrupting compounds (EDCs) and foodborne contaminants are environmental pollutants that are considered reproductive toxicants due to their deleterious effects on female and male gametes. Among the EDCs, the phthalate plasticizers are of growing concern. In-vivo and in-vitro models indicate that the oocyte is highly sensitive to phthalates. This review summarizes the effects of di(2-ethylhexyl) phthalate and its major metabolite mono(2-ethyhexyl) phthalate (MEHP) on the oocyte. MEHP reduces the proportion of oocytes that fertilize, cleave and develop to the blastocyst stage. This is associated with negative effects on meiotic progression, and disruption of cortical granules, endoplasmic reticulum and mitochondrial reorganization. MEHP alters mitochondrial membrane polarity, increases reactive oxygen species levels and induces alterations in genes associated with oxidative phosphorylation. A carryover effect from the oocyte to the blastocyst is manifested by alterations in the transcriptomic profile of blastocysts developed from MEHP-treated oocytes. Among foodborne contaminants, the pesticide atrazine (ATZ) and the mycotoxin aflatoxin B1 (AFB1) are of high concern. The potential hazards associated with exposure of spermatozoa to these contaminants and their carryover effect to the blastocyst are described. AFB1 and ATZ reduce spermatozoa's viability, as reflected by a high proportion of cells with damaged plasma membrane; induce acrosome reaction, expressed as damage to the acrosomal membrane; and interfere with mitochondrial function, characterized by hyperpolarization of the membrane. ATZ and AFB1-treated spermatozoa show a high proportion of cells with fragmented DNA. Exposure of spermatozoa to AFB1 and ATZ reduces fertilization and cleavage rates, but not that of blastocyst formation. However, fertilization with AFB1- or ATZ-treated spermatozoa impairs transcript expression in the formed blastocysts, implying a carryover effect. Taken together, the review indicates the risk of exposing farm animals to environmental contaminants, and their deleterious effects on female and male gametes and the developing embryo.
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Affiliation(s)
- Zvi Roth
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Alisa Komsky-Elbaz
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Dorit Kalo
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
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16
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Hernandez-Jerez AF, Adriaanse P, Aldrich AP, Berny P, Duquesne S, Gimsing AL, Millet M, Pelkonen O, Pieper S, Tiktak A, Topping CJ, Tzoulaki I, Widenfalk A, Wolterink G, Kuhl T, Friel A, Istace F, Kardassi D, Lythgo C, Serafimova R, Coja T. Scientific Opinion on the setting of health-based reference values for metabolites of the active substance terbuthylazine. EFSA J 2020; 17:e05712. [PMID: 32626335 PMCID: PMC7009062 DOI: 10.2903/j.efsa.2019.5712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The EFSA Panel on Plant Protection Products and their Residues was requested to establish health‐based reference values for groundwater metabolites (LM2, LM3, LM4, LM5 and LM6) of the active substance terbuthylazine based on the available evidence, unless the evidence was considered insufficient to do so. The request was accepted under the explicit circumstance that the reassessment would be made according to a different methodology than the routine methodology currently applied for the assessment of metabolites in groundwater. While for metabolites LM2, LM4 and LM5, it was concluded that the reference values for terbuthylazine are applicable, substance‐specific reference values could not be derived for metabolites LM3 and LM6. The applied threshold of toxicological concern (TTC) approach has shown that metabolites LM3 and LM6 are of potential concern for consumer health, since at least one representative groundwater leaching scenario results in exposure above the relevant threshold. Moreover, other sources of exposure to LM3 and LM6 could not be excluded with certainty. It is therefore recommended to address the specific toxicities of metabolites LM3 and LM6.
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Saalfeld GQ, Varela Junior AS, Castro T, Pires DM, Pereira JR, Pereira FA, Corcini CD, Colares EP. Atrazine exposure in gestation and breastfeeding affects Calomys laucha sperm cells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:34953-34963. [PMID: 31664666 DOI: 10.1007/s11356-019-06577-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 09/23/2019] [Indexed: 06/10/2023]
Abstract
The present study evaluated the effects of low doses of atrazine administered during gestation and breastfeeding on sperm characteristics of the wild rodent Calomys laucha. Adult females were divided into groups of 10 and administered different doses of atrazine through gavage, during gestational or breastfeeding period. At 3 months of age, the F1 adult male progeny of these females was evaluated. We observed a drastic reduction in the total and progressive motility of male sperm cells at all doses and during both the exposure periods. Moreover, the plasma membrane integrity of adult male sperm cells decreased at all doses of atrazine administered during the breastfeeding, whereas the membrane fluidity of these cells increased at all tested doses. Atrazine led to a decrease in the sperm mitochondrial functionality at all doses and during both exposure periods. The damage to the sperm DNA was higher in males exposed to the highest dose (1.0 mg/kg) during the gestation period, and in animals exposed to the lowest dose of atrazine (0.1 mg/kg) during breastfeeding period. Furthermore, the highest dose (1.0 mg/kg) of atrazine reduced the sperm concentration. Furthermore, the reduced levels of reactive oxygen species (ROS) were observed at all evaluated doses in males exposed during the gestation period. These results suggest that the administration of low doses of atrazine at critical periods of development may permanently reduce the sperm quality in C. laucha.
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Affiliation(s)
- Graciela Quintana Saalfeld
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Avenida Itália, Km 08 s/n, Caixa Postal 474, Rio Grande, RS, Cep: 96201-900, Brazil.
| | - Antônio Sergio Varela Junior
- Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil
| | - Tiane Castro
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Avenida Itália, Km 08 s/n, Caixa Postal 474, Rio Grande, RS, Cep: 96201-900, Brazil
| | - Diego Martins Pires
- ReproPel, Faculdade de Veterinária, Campus Capão do Leão, Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil
| | - Jéssica Ribeiro Pereira
- Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil
| | - Fernanda Alves Pereira
- Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil
| | - Carine Dahl Corcini
- Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil
- ReproPel, Faculdade de Veterinária, Campus Capão do Leão, Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil
| | - Elton Pinto Colares
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Avenida Itália, Km 08 s/n, Caixa Postal 474, Rio Grande, RS, Cep: 96201-900, Brazil
- Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil
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Zhang C, Li H, Qin L, Ge J, Qi Z, Talukder M, Li YH, Li JL. Nuclear receptor AHR-mediated xenobiotic detoxification pathway involves in atrazine-induced nephrotoxicity in quail (Coturnix C. coturnix). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 253:889-898. [PMID: 31349198 DOI: 10.1016/j.envpol.2019.07.058] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 07/08/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Atrazine (ATR), one of the most widely used pesticides in agricultural production, are gradually concerned due to potential ecosystem and health risks. Further, the induction of ATR nephrotoxicity and detoxification response is still unknown. To evaluate ATR-induced nephrotoxicity, quails were treated with 0, 50, 250 or 500 mg/kg ATR by gavage administration for 45 days. Histopathology indicated that ATR exposure caused renal tubular epithelial cell swelling and endoplasmic reticulum degeneration, suggesting that ATR exposure causes renal impairment even renal diseases. Notably, ATR interfered cytochrome P450 system (CYP450s) homeostasis by enhancing contents or activities of CYP450s (total CYP450, Cyt b5, AH, APND, NCR and ERND) and the expression of CYP450 isoforms (CYP1A, CYP1B, CYP2C and CYP3A). ATR triggered phase II detoxifying reaction, reflected by the elevated GSH level, GST activity and the up-regulation of GST isoforms (GSTa, GSTa3 and GSTt1) and GSH synthetase (GCLC). Moreover, ABC transporters were activated to expel ATR from the body by increasing expression of MRP1 and P-GP gene. Accompanying these alterations, the nuclear receptors (AHR, CAR and PXR) were activated by ATR in a dose-dependent manner. Analysis results of present study demonstrated that the induction of phase II detoxifying enzyme system and ABC transporters could be modulated by nuclear receptors response and CYP450s disturbance in low-dose ATR-treated quail. In conclusion, all data suggested that nuclear receptors AHR-mediated detoxification pathway was involved in ATR-induced nephrotoxicity. These results provided new evidence about the nephrotoxic effects of ATR on the response of biotransformation and detoxification system.
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Affiliation(s)
- Cong Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Huixin Li
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, 150086, PR China
| | - Lei Qin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Laboratory Animal Centre, Qiqihar Medical University, Qiqihar, 161006, PR China
| | - Jing Ge
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Zhang Qi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Milton Talukder
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Department of Physiology and Pharmacology, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Barishal, 8210, Bangladesh
| | - Yan-Hua Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Jin-Long Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Key Laboratory of the Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, PR China.
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19
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Lin J, Xia J, Zhao HS, Hou R, Talukder M, Yu L, Guo JY, Li JL. Lycopene Triggers Nrf2-AMPK Cross Talk to Alleviate Atrazine-Induced Nephrotoxicity in Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:12385-12394. [PMID: 30360616 DOI: 10.1021/acs.jafc.8b04341] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Atrazine (ATR), an environmental persistent and bioaccumulative herbicide, has been associated with environmental nephrosis. Lycopene (LYC) exhibits important properties of nephroprotection, but there are limited data on the specific underlying mechanism. The primary objective of this study was to explore the therapeutic effect of LYC on ATR-induced nephrotoxicity in mice. The mice were divided randomly into 6 groups and treated as follows: control group (C), 5 mg/kg LYC group (L), 50 mg/kg ATR group (A1), 200 mg/kg ATR group (A2), 50 mg/kg ATR plus 5 mg/kg LYC group (A1+L), and 200 mg/kg ATR plus 5 mg/kg LYC group (A2+L) by oral gavage administration for 21 days. We found that pretreatment with LYC significantly suppressed the ATR-induced renal tubular epithelial cell swelling. Furthermore, LYC mitigated ATR-induced dysregulation of oxidative stress markers by reducing MDA, H2O2 levels, and increasing SOD, GPx, CAT concentration, and Nrf2 activation. Moreover, LYC activated the autophagic flux by a detectable change in autophagy-related genes (Beclin-1 and ATGs) and proteins (p62/SQSTM) and by the formation of autophagic vacuole (AV) and LC3 aggregation, in parallel with AMPK activation (pAMPK/AMPK). Herein, ATR-up-regulated nuclear factor erythroid 2-related factor 2 (Nrf2) expression and Nrf2-regulated redox genes, including quinoneoxidoreductase-1 (NQO1) and heme oxidase-1 (HO1), whereas LYC down-regulated those of the above genes. In addition, LYC suppressed ATR-induced activation of autophagy (increased LC3II/LC3I, ATGs, Beclin1, and p62, in parallel with increased AMPK activation). Collectively, our findings identified a cross talk between AMPK-activated autophagy and the Nrf2 signaling pathway in LYC-mediated nephroprotection against ATR-induced toxicity in mice kidney.
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Affiliation(s)
- Jia Lin
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
| | - Jun Xia
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
| | - Hua-Shan Zhao
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
| | - Rui Hou
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
| | - Milton Talukder
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
- Department of Physiology and Pharmacology, Faculty of Animal Science and Veterinary Medicine , Patuakhali Science and Technology University , Barishal 8210 , Bangladesh
| | - Lei Yu
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
| | - Jian-Ying Guo
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
| | - Jin-Long Li
- College of Veterinary Medicine , ‡Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment , and §Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine , Northeast Agricultural University , Harbin 150030 , P.R. China
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20
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A novel mechanism underlies atrazine toxicity in quails (Coturnix Coturnix coturnix): triggering ionic disorder via disruption of ATPases. Oncotarget 2018; 7:83880-83892. [PMID: 27924060 PMCID: PMC5356632 DOI: 10.18632/oncotarget.13794] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/22/2016] [Indexed: 01/19/2023] Open
Abstract
The widely used atrazine has been reported to exhibit extensive ecological hazards. Due to the biological accumulation, atrazine elicits widespread toxic effects on different organisms. However, true proof for the mechanism of atrazine-induced toxicity is lacking. To determine the potential mechanism by which atrazine exerted toxic effects, quails were treated with atrazine (0, 50, 250 and 500 mg/kg) by gavage administration for 45 days. Atrazine significantly increased the histological alterations and serum creatine kinase, lactate dehydrogenase and choline esterase levels. A marked disorder in ionic (Na+, K+, Ca2+ and Mg2+)contents and the decrease of ATPases (Na+-K+-ATPase, Ca2+-ATPase, Mg2+-ATPase and Ca2+-Mg2+-ATPase) activities were observed in the heart and liver of atrazine-exposed quails. Of note, it was also observed that atrazine suppressed the transcription of Na+, K+ transfer associated genes (Na+-K+-ATPase subunits) and Ca2+ transfer associated genes (Ca2+-ATPase subunits, solute carriers) in heart and liver. In conclusion, atrazine induced cardiac and hepatic damage via causing the ionic disorder, triggering the transcription of the ion transporters and leading the histopathological and functional alternations in the heart and liver of quails. This study demonstrated atrazine significantly induced the ionic disorder via decreasing the ATPases activities and disturbing the transcription of the ion transporters.
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21
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Atrazine-induced environmental nephrosis was mitigated by lycopene via modulating nuclear xenobiotic receptors-mediated response. J Nutr Biochem 2018; 51:80-90. [DOI: 10.1016/j.jnutbio.2017.09.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 06/01/2017] [Accepted: 09/05/2017] [Indexed: 12/20/2022]
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22
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Kaczyński P, Łozowicka B, Perkowski M, Szabuńko J. Multiclass pesticide residue analysis in fish muscle and liver on one-step extraction-cleanup strategy coupled with liquid chromatography tandem mass spectrometry. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 138:179-189. [PMID: 28056418 DOI: 10.1016/j.ecoenv.2016.12.040] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 12/29/2016] [Accepted: 12/30/2016] [Indexed: 05/15/2023]
Abstract
The analysis of pesticide residues in fish samples is challenging due to the low concentrations and large number of analytes that need to be monitored and quantified in a complex matrix. This is the first report providing a novel one-step extraction-cleanup strategy for simultaneous analysis of over 340 pesticides in a fatty fish and liver matrix, coupled with liquid-chromatography tandem mass spectrometry. The samples of fish muscle and liver were prepared according to the modified QuEChERS (quick, easy, cheap, effective, rugged and safe) procedure, wherein the extraction and cleanup protocol were integrated into one step. Among the tested cleanup dispersive solid phase extraction sorbents (C18, primary-secondary amine, Z-Sep), chitin yielded the best results. Spike-in experiments were carried out at three different spiking levels in fish and liver to determine the recovery, precision and limits of detection of the method as well as the matrix effect. The method's detection limits ranged from 0.05 to 1.2μgkg-1, while recoveries of most pesticides were in the range of 70-120% with associated precision - relative standard deviations below 20%. A linear relationship was observed within the range of 0.005-1mgkg-1, and the correlation coefficient was R2>0.997. Expanded measurement uncertainty was estimated to be between 7% and 52%, on average. Matrix effects were evaluated and were not significant for the vast majority of pesticides. The validated method was employed in the analysis of 54 real fish and liver samples in which 10 different pesticides with concentrations ranging from 0.005 to 0.047mgkg-1 were detected.
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Affiliation(s)
- Piotr Kaczyński
- Institute of Plant Protection - National Research Institute, Chełmońskiego 22, 15-195 Bialystok, Poland.
| | - Bożena Łozowicka
- Institute of Plant Protection - National Research Institute, Chełmońskiego 22, 15-195 Bialystok, Poland
| | - Maciej Perkowski
- University of Białystok, Faculty of Law, Department of International Law, Mickiewicza 1, 15-213 Białystok, Poland
| | - Julia Szabuńko
- Institute of Plant Protection - National Research Institute, Chełmońskiego 22, 15-195 Bialystok, Poland
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Louis GW, Hallinger DR, Braxton MJ, Kamel A, Stoker TE. Effects of chronic exposure to triclosan on reproductive and thyroid endpoints in the adult Wistar female rat. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:236-249. [PMID: 28569618 PMCID: PMC5994608 DOI: 10.1080/15287394.2017.1287029] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Triclosan (TCS), an antibacterial, has been shown to be an endocrine disruptor in the rat. Previously, subchronic TCS treatment to female rats was found to advance puberty and potentiate the effect of ethinyl estradiol (EE) on uterine growth when EE and TCS were co-administered prior to weaning. In the pubertal study, a decrease in serum thyroxine (T4) concentrations with no significant change in serum thyroid-stimulating hormone (TSH) was also observed. The purpose of the present study was to further characterize the influence of TCS on the reproductive and thyroid axes of the female rat using a chronic exposure regimen. Female Wistar rats were exposed by oral gavage to vehicle control, EE (1 μg/kg), or TCS (2.35, 4.69, 9.375 or 37.5 mg/kg) for 8 months and estrous cyclicity monitored. Although a divergent pattern of reproductive senescence appeared to emerge from 5 to 11 months of age between controls and EE-treated females, no significant difference in cyclicity was noted between TCS-treated and control females. A higher % control females displayed persistent diestrus (PD) by the end of the study, whereas animals administered with positive control (EE) were predominately persistent estrus (PE). Thyroxine concentration was significantly decreased in TCS-administered 9.375 and 37.5 mg/kg groups, with no marked effects on TSH levels, thyroid tissue weight, or histology. Results demonstrate that a long-term exposure to TCS did not significantly alter estrous cyclicity or timing of reproductive senescence in females but suppressed T4 levels at a lower dose than previously observed.
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Affiliation(s)
- Gwendolyn W. Louis
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
- Oak Ridge Institute for Science and Education (ORISE), US Department of Energy, Oak Ridge, TN, USA
| | - Daniel R. Hallinger
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
| | - M. Janay Braxton
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
| | - Alaa Kamel
- Analytical Chemistry Branch, Biological and Economic Analysis Division, Office of Pesticide Programs, U.S. EPA, Fort Meade, MD, USA
| | - Tammy E. Stoker
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
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Komsky-Elbaz A, Roth Z. Effect of the herbicide atrazine and its metabolite DACT on bovine sperm quality. Reprod Toxicol 2017; 67:15-25. [DOI: 10.1016/j.reprotox.2016.11.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 10/30/2016] [Accepted: 11/01/2016] [Indexed: 01/07/2023]
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25
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Russart KL, Rhen T. Atrazine alters expression of reproductive and stress genes in the developing hypothalamus of the snapping turtle, Chelydra serpentina. Toxicology 2016; 366-367:1-9. [DOI: 10.1016/j.tox.2016.08.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 07/27/2016] [Accepted: 08/01/2016] [Indexed: 11/16/2022]
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Lin J, Li HX, Xia J, Li XN, Jiang XQ, Zhu SY, Ge J, Li JL. The chemopreventive potential of lycopene against atrazine-induced cardiotoxicity: modulation of ionic homeostasis. Sci Rep 2016; 6:24855. [PMID: 27112537 PMCID: PMC4845055 DOI: 10.1038/srep24855] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 04/05/2016] [Indexed: 12/06/2022] Open
Abstract
People who drink water contaminated with atrazine (ATR) over many years can experience problems with their cardiovascular system. Lycopene (LYC) has been shown to exhibit cardiovascular disease preventive effects. However, chemopreventive potential of LYC against ATR-induced cardiotoxicity remains unclear. To determine the effects of ATR and/or LYC on heart, mice were treated with ATR (50 mg/kg or 200 mg/kg) and/or LYC (5 mg/kg) by intragastric administration for 21 days. Histopathological and biochemical analyses, including analysis of ion concentrations (Na+, K+, Ca2+ and Mg2+), ATPases (Na+-K+-ATPase, Ca2+-ATPase, Mg2+-ATPase and Ca2+-Mg2+-ATPase) activities and the transcription of their subunits, were performed on heart. The results revealed that ATR led to decreased Creative Kinase (CK) activity and increased histological alterations. Furthermore, a significant change in Na+, K+ and Ca2+ content and the down-regulation of Na+-K+-ATPase and Ca2+-ATPase activities and the mRNA expression of their subunits were observed in ATR-exposed mice. Notably, supplementary LYC significantly protected the heart against ATR-induced damage. In conclusion, ATR induced cardiotoxicity by modulating cardiac ATPase activity and the transcription of its subunits, thereby triggering ionic disturbances. However, supplementary LYC significantly combated ATR-induced cardiotoxicity via the regulation of ATPase activity and subunit transcription. Thus, LYC exhibited a significant chemopreventive potential against ATR-induced cardiotoxicity.
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Affiliation(s)
- Jia Lin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Hui-Xin Li
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, People's Republic of China
| | - Jun Xia
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xue-Nan Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xiu-Qing Jiang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Shi-Yong Zhu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jing Ge
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jin-Long Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
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27
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Liu Z, Wang Y, Zhu Z, Yang E, Feng X, Fu Z, Jin Y. Atrazine and its main metabolites alter the locomotor activity of larval zebrafish (Danio rerio). CHEMOSPHERE 2016; 148:163-170. [PMID: 26803580 DOI: 10.1016/j.chemosphere.2016.01.007] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/03/2016] [Accepted: 01/04/2016] [Indexed: 06/05/2023]
Abstract
Atrazine (ATZ) and its main chlorometabolites, i.e., diaminochlorotriazine (DACT), deisopropylatrazine (DIP), and deethylatrazine (DE), have been widely detected in aquatic systems near agricultural fields. However, their possible effects on aquatic animals are still not fully understood. In this study, it was observed that several developmental endpoints such as the heart beat, hatchability, and morphological abnormalities were influenced by ATZ and its metabolites in different developmental stages. In addition, after 5 days of exposure to 30, 100, 300 μg L(-1) ATZ and its main chlorometabolites, the swimming behaviors of larval zebrafish were significantly disturbed, and the acetylcholinesterase (AChE) activities were consistently inhibited. Our results also demonstrate that ATZ and its main chlorometabolites are neuroendocrine disruptors that impact the expression of neurotoxicity-related genes such as Ache, Gap43, Gfap, Syn2a, Shha, Mbp, Elavl3, Nestin and Ngn1 in early developmental stages of zebrafish. According to our results, it is possible that not only ATZ but also its metabolites (DACT, DIP and DE) have the same or even more toxic effects on different endpoints of the early developmental stages of zebrafish.
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Affiliation(s)
- Zhenzhen Liu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yueyi Wang
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhihong Zhu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Enlu Yang
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Xiayan Feng
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhengwei Fu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yuanxiang Jin
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
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28
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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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Wirbisky SE, Weber GJ, Sepúlveda MS, Xiao C, Cannon JR, Freeman JL. Developmental origins of neurotransmitter and transcriptome alterations in adult female zebrafish exposed to atrazine during embryogenesis. Toxicology 2015; 333:156-167. [PMID: 25929836 PMCID: PMC4471955 DOI: 10.1016/j.tox.2015.04.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 04/21/2015] [Accepted: 04/24/2015] [Indexed: 11/24/2022]
Abstract
Atrazine is an herbicide applied to agricultural crops and is indicated to be an endocrine disruptor. Atrazine is frequently found to contaminate potable water supplies above the maximum contaminant level of 3μg/L as defined by the U.S. Environmental Protection Agency. The developmental origin of adult disease hypothesis suggests that toxicant exposure during development can increase the risk of certain diseases during adulthood. However, the molecular mechanisms underlying disease progression are still unknown. In this study, zebrafish embryos were exposed to 0, 0.3, 3, or 30μg/L atrazine throughout embryogenesis. Larvae were then allowed to mature under normal laboratory conditions with no further chemical treatment until 7 days post fertilization (dpf) or adulthood and neurotransmitter analysis completed. No significant alterations in neurotransmitter levels was observed at 7dpf or in adult males, but a significant decrease in 5-hydroxyindoleacetic acid (5-HIAA) and serotonin turnover was seen in adult female brain tissue. Transcriptomic analysis was completed on adult female brain tissue to identify molecular pathways underlying the observed neurological alterations. Altered expression of 1928, 89, and 435 genes in the females exposed to 0.3, 3, or 30μg/L atrazine during embryogenesis were identified, respectively. There was a high level of overlap between the biological processes and molecular pathways in which the altered genes were associated. Moreover, a subset of genes was down regulated throughout the serotonergic pathway. These results provide support of the developmental origins of neurological alterations observed in adult female zebrafish exposed to atrazine during embryogenesis.
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Affiliation(s)
- Sara E Wirbisky
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA.
| | - Gregory J Weber
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA.
| | - Maria S Sepúlveda
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA; Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA.
| | - Changhe Xiao
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA.
| | - Jason R Cannon
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA.
| | - Jennifer L Freeman
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, USA.
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30
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Thueson LE, Emmons TR, Browning DL, Kreitinger JM, Shepherd DM, Wetzel SA. In vitro exposure to the herbicide atrazine inhibits T cell activation, proliferation, and cytokine production and significantly increases the frequency of Foxp3+ regulatory T cells. Toxicol Sci 2015; 143:418-29. [PMID: 25433234 PMCID: PMC4306722 DOI: 10.1093/toxsci/kfu242] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The herbicide atrazine (2-chloro-4-[ethylamino]-6-[isopropylamino]-s-triazine) is the most common water contaminant in the United States. Atrazine is a phosphodiesterase inhibitor and is classified as an estrogen disrupting compound because it elevates estrogen levels via induction of the enzyme aromatase. Previous studies have shown that atrazine exposure alters the function of innate immune cells such as NK cells, DC, mast cells, and macrophages. In this study we have examined the impact of in vitro atrazine exposure on the activation, proliferation, and effector cytokine production by primary murine CD4(+) T lymphocytes. We found that atrazine exposure significantly inhibited CD4(+) T cell proliferation and accumulation as well as the expression of the activation markers CD25 and CD69 in a dose-dependent manner. Interestingly, the effects were more pronounced in cells from male animals. These effects were partially mimicked by pharmacological reagents that elevate intracellular cAMP levels and addition of exogenous rmIL-2 further inhibited proliferation and CD25 expression. Consistent with these findings, atrazine exposure during T cell activation resulted in a 2- to 5-fold increase in the frequency of Foxp3(+) CD4(+) T cells.
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Affiliation(s)
- Lindsay E Thueson
- *Division of Biological Sciences, Center for Environmental Health Sciences and Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, Montana 59812
| | - Tiffany R Emmons
- *Division of Biological Sciences, Center for Environmental Health Sciences and Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, Montana 59812
| | - Dianna L Browning
- *Division of Biological Sciences, Center for Environmental Health Sciences and Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, Montana 59812
| | - Joanna M Kreitinger
- *Division of Biological Sciences, Center for Environmental Health Sciences and Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, Montana 59812
| | - David M Shepherd
- *Division of Biological Sciences, Center for Environmental Health Sciences and Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, Montana 59812
| | - Scott A Wetzel
- *Division of Biological Sciences, Center for Environmental Health Sciences and Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, Montana 59812 *Division of Biological Sciences, Center for Environmental Health Sciences and Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, Montana 59812
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31
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Brandhonneur N, De Sousa Mendes M, Lepvrier E, Flejou Esseiva E, Chevanne F, Le Corre P. A micro-QuEChERS method coupled to GC–MS for the quantification of pesticides in specific maternal and fetal tissues. J Pharm Biomed Anal 2015; 104:90-6. [DOI: 10.1016/j.jpba.2014.10.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/30/2014] [Accepted: 10/31/2014] [Indexed: 10/24/2022]
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32
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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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33
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Lin Z, Roede JR, He C, Jones DP, Filipov NM. Short-term oral atrazine exposure alters the plasma metabolome of male C57BL/6 mice and disrupts α-linolenate, tryptophan, tyrosine and other major metabolic pathways. Toxicology 2014; 326:130-41. [PMID: 25445803 DOI: 10.1016/j.tox.2014.11.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/28/2014] [Accepted: 11/02/2014] [Indexed: 12/15/2022]
Abstract
Overexposure to the commonly used herbicide atrazine (ATR) affects several organ systems, including the brain. Previously, we demonstrated that short-term oral ATR exposure causes behavioral deficits and dopaminergic and serotonergic dysfunction in the brains of mice. Using adult male C57BL/6 mice, the present study aimed to investigate effects of a 10-day oral ATR exposure (0, 5, 25, 125, or 250mg/kg) on the mouse plasma metabolome and to determine metabolic pathways affected by ATR that may be reflective of ATR's effects on the brain and useful to identify peripheral biomarkers of neurotoxicity. Four hours after the last dosing on day 10, plasma was collected and analyzed with high-performance, dual chromatography-Fourier-transform mass spectrometry that was followed by biostatistical and bioinformatic analyses. ATR exposure (≥5mg/kg) significantly altered plasma metabolite profile and resulted in a dose-dependent increase in the number of metabolites with ion intensities significantly different from the control group. Pathway analyses revealed that ATR exposure strongly correlated with and disrupted multiple metabolic pathways. Tyrosine, tryptophan, linoleic acid and α-linolenic acid metabolic pathways were among the affected pathways, with α-linolenic acid metabolism being affected to the greatest extent. Observed effects of ATR on plasma tyrosine and tryptophan metabolism may be reflective of the previously reported perturbations of brain dopamine and serotonin homeostasis, respectively. ATR-caused alterations in the plasma profile of α-linolenic acid metabolism are a potential novel and sensitive plasma biomarker of ATR effect and plasma metabolomics could be used to better assess the risks, including to the brain, associated with ATR overexposure.
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Affiliation(s)
- Zhoumeng Lin
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA.
| | - James R Roede
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA.
| | - Chunla He
- Department of Epidemiology and Biostatistics, College of Public Health, University of Georgia, Athens, GA 30602, USA.
| | - Dean P Jones
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA.
| | - Nikolay M Filipov
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA.
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34
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Assessment of the protective role of vitamin E in atrazine toxicity on the testis of adult albino rats. ACTA ACUST UNITED AC 2014. [DOI: 10.1097/01.ehx.0000452051.31994.b0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Disposition and acute toxicity of imidacloprid in female rats after single exposure. Food Chem Toxicol 2014; 68:190-5. [DOI: 10.1016/j.fct.2014.03.019] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 02/11/2014] [Accepted: 03/15/2014] [Indexed: 11/18/2022]
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36
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Keshk WA, Soliman NA, Abo El-Noor MM, Wahdan AA, Shareef MM. Modulatory Effects of Curcumin on Redox Status, Mitochondrial Function, and Caspace-3 Expression During Atrazin-Induced Toxicity. J Biochem Mol Toxicol 2014; 28:378-85. [DOI: 10.1002/jbt.21574] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 04/11/2014] [Accepted: 04/30/2014] [Indexed: 12/29/2022]
Affiliation(s)
- Walaa A. Keshk
- Department of Medical Biochemistry; Faculty of Medicine, Tanta University; Tanta Egypt
| | - Nema A. Soliman
- Department of Medical Biochemistry; Faculty of Medicine, Tanta University; Tanta Egypt
| | - Mona M. Abo El-Noor
- Department of Forensic Medicine and Clinical Toxicology; Faculty of Medicine, Tanta University; Tanta Egypt
| | - Amira A. Wahdan
- Department of Forensic Medicine and Clinical Toxicology; Faculty of Medicine, Tanta University; Tanta Egypt
| | - Mohamed M. Shareef
- Department of Pathology; Faculty of Medicine, Tanta University; Tanta Egypt
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37
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Mansour SA, Mohamed DA, Sutra JF. Which exposure stage (gestation or lactation) is more vulnerable to atrazine toxicity? Studies on mouse dams and their pups. Toxicol Rep 2014; 1:53-68. [PMID: 28962226 PMCID: PMC5598136 DOI: 10.1016/j.toxrep.2014.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 04/14/2014] [Accepted: 04/14/2014] [Indexed: 11/17/2022] Open
Abstract
Either during gestation or lactation, the experimental mouse dams received one of the following treatments: (a) diet free of pesticide; (b) diet enriched with atrazine (ATZ); 31.0 μg kg−1; (c) diet free of pesticide + oral vitamin E (α-tocopherol; 200 mg kg−1 per mouse); and (d) diet enriched with ATZ (31.0 μg kg−1) + oral vitamin E (200 mg kg−1 per mouse). At the weaning, pups and dams were killed and selected organs and blood samples were collected for analyses. Compared with the control results, ATZ induced alteration in a number of biochemical and histopathological parameters either in the dams or their offspring. The ameliorative effect of vitamin E, based on estimating the “Ameliorative Index; AI” to malondialdehyde (MDA) and superoxide dismutase (SOD) ranged between 0.95 and 1.06 (≈1.0) for the dams and the pups either in gestational or lactational exposure routes. In general, the mouse pups were more vulnerable to ATZ toxicity than their mothers and exposure during gestation was suggested to be more effective than during lactation. The findings may support the need to further investigating the adverse effects of exposure to low doses of commonly used pesticides, especially during pregnancy and breast-feeding as well as effects on newborn child.
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Affiliation(s)
- Sameeh A Mansour
- Environmental Toxicology Research Unit (ETRU), Pesticide Chemistry Department, National Research Centre, Dokki, Cairo, Egypt
| | - Doha A Mohamed
- Food Science & Nutrition Department, National Research Centre, Dokki, Cairo, Egypt
| | - Jean F Sutra
- TOXALIM (Research Centre in Food Toxicology), UMR 1331 INRA/INP/UPS, Equipe TMR, BP 93173,180 chemin de Tournefeuille, 31 027 Toulouse Cedex 3, France
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38
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Jin Y, Wang L, Chen G, Lin X, Miao W, Fu Z. Exposure of mice to atrazine and its metabolite diaminochlorotriazine elicits oxidative stress and endocrine disruption. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:782-90. [PMID: 24632104 DOI: 10.1016/j.etap.2014.02.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 02/17/2014] [Accepted: 02/17/2014] [Indexed: 05/08/2023]
Abstract
Effects of atrazine (ATZ) and its metabolite diaminochlorotriazine (DACT) on the induction of oxidative stress and endocrine disruption were studied in mice. Body and liver weights decreased in all ATZ and DACT treated groups. Hepatic activities of superoxide dismutase (SOD) increased significantly after 1 week of intraperitoneal injection of 200 mg/kg ATZ, 100 and 200 mg/kg DACT. Hepatic activities of catalase (CAT) and glutathione S-transferase (GST) were also affected by the treatment with 200 mg/kg DACT. In serum, the glutathione peroxidase (GPX) and GST activities and glutathione (GSH) content decreased significantly in the 200 mg/kg DACT treated group. Moreover, the administration of ATZ and DACT decreased the transcription levels of key genes related to cholesterol transport and testosterone (T) synthesis including scavenger receptor class B type 1 (SR-B1), cytochrome P450 cholesterol side-chain cleavage enzyme (P450scc) and cytochrome P450 17α-hydroxysteroid dehydrogenase (P450 17α) in testes. Furthermore, the treatment with 200 mg/kg DACT significantly decreased the serum and testicular T levels, while the treatment with 200 mg/kg ATZ significantly decreased the testicular T levels. The results indicated that the acute exposure to ATZ and DACT induced oxidative stress and endocrine disruption in mice, and DACT showed much more toxic than ATZ did.
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Affiliation(s)
- Yuanxiang Jin
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Linggang Wang
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Guanliang Chen
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Xiaojian Lin
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Wenyu Miao
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhengwei Fu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
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39
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Sun Y, Li YS, Yang JW, Yu J, Wu YP, Li BX. Exposure to atrazine during gestation and lactation periods: toxicity effects on dopaminergic neurons in offspring by downregulation of Nurr1 and VMAT2. Int J Mol Sci 2014; 15:2811-25. [PMID: 24552878 PMCID: PMC3958883 DOI: 10.3390/ijms15022811] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 01/16/2014] [Accepted: 01/17/2014] [Indexed: 01/25/2023] Open
Abstract
High atrazine (2-chloro-4-ethytlamino-6-isopropylamine-1,3,5-triazine; ATR) contents in the environment threaten the health conditions of organisms. We examined the effects of ATR exposure on Sprague-Dawley rats during gestation and on the dopaminergic neurons of offspring during lactation. Pregnant dams were orally treated with 0 mg/kg/day to 50 mg/kg/day of ATR from gestational day 5 to postnatal day 22. Afterward, neither offspring nor dams received ATR. Dopamine (DA) content was examined in striatum samples by HPLC-FL; the mRNA expressions of tyrosine hydroxylase (TH), orphan nuclear hormone (Nurr1), dopamine transporter (DAT), and vesicular monoamine transporter 2 (VMAT2) in the ventral midbrain samples were examined by fluorescence PCR when the offspring reached one year of age. After the pregnant rats were exposed to ATR, the DA concentrations and mRNA levels of Nurr1 were decreased in their offspring. Decreased Nurr1 levels were also accompanied by changes in the mRNA levels of VMAT2, which controls the transport and reuptake of DA.
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Affiliation(s)
- Yan Sun
- Department of Toxicology, School of Public Health, Harbin Medical University, Harbin 150081, China.
| | - Yan-Shu Li
- Department of Toxicology, School of Public Health, Harbin Medical University, Harbin 150081, China.
| | - Jun-Wei Yang
- Department of Toxicology, School of Public Health, Harbin Medical University, Harbin 150081, China.
| | - Jia Yu
- Department of Toxicology, School of Public Health, Harbin Medical University, Harbin 150081, China.
| | - Yan-Ping Wu
- Department of Toxicology, School of Public Health, Harbin Medical University, Harbin 150081, China.
| | - Bai-Xiang Li
- Department of Toxicology, School of Public Health, Harbin Medical University, Harbin 150081, China.
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40
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Lin Z, Fisher JW, Wang R, Ross MK, Filipov NM. Estimation of placental and lactational transfer and tissue distribution of atrazine and its main metabolites in rodent dams, fetuses, and neonates with physiologically based pharmacokinetic modeling. Toxicol Appl Pharmacol 2013; 273:140-58. [DOI: 10.1016/j.taap.2013.08.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 08/07/2013] [Accepted: 08/10/2013] [Indexed: 11/27/2022]
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Lin Z, Dodd CA, Filipov NM. Short-term atrazine exposure causes behavioral deficits and disrupts monoaminergic systems in male C57BL/6 mice. Neurotoxicol Teratol 2013; 39:26-35. [DOI: 10.1016/j.ntt.2013.06.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 06/06/2013] [Accepted: 06/06/2013] [Indexed: 11/24/2022]
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42
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Mela M, Guiloski IC, Doria HB, Randi MAF, de Oliveira Ribeiro CA, Pereira L, Maraschi AC, Prodocimo V, Freire CA, Silva de Assis HC. Effects of the herbicide atrazine in neotropical catfish (Rhamdia quelen). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 93:13-21. [PMID: 23623483 DOI: 10.1016/j.ecoenv.2013.03.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 03/22/2013] [Accepted: 03/25/2013] [Indexed: 06/02/2023]
Abstract
The exposure to a world-wide used herbicide atrazine (ATZ) (96h exposure to 2, 10, and 100μgL(-1)), was investigated on the freshwater fish Rhamdia quelen through a multi biomarker approach. Liver histopathology revealed leukocyte infiltration, hepatocyte vacuolization like steatosis and necrosis areas, leading to raised lesion index levels in all tested concentrations. The increase of free melanomacrophage numbers was observed. Gill filaments revealed considerable loss of the microridges on pavement cells at 10 and 100μgL(-1) of ATZ, and a significantly increased of chloride cell (CC) number and density on apical surface area at 100μgL(-1) of ATZ. CAT, GST, GPx, and GR activities were inhibited by all tested concentrations. GSH levels were reduced in individuals exposed to 100µgL(-1). Osmoregulatory function was also disturbed. We observed an increase of plasma magnesium concentrations at 10µgL(-1). Additionally the inhibition of branchial carbonic anhydrase activity was observed at 100µgL(-1). In the kidney, carbonic anhydrase activity decreased only in the group exposed to 2µgL(-1). These results suggest that ATZ, represents a potential ecotoxicological hazard and can be hepatotoxic and nephrotoxic even low concentrations. The current study was the first to show the nephrotoxic effect of ATZ in fish. Besides, in Brazil, the environmental protection agency (CONAMA) establishes that the maximum allowed level of dissolved ATZ in water is 2μgL(-1), but the present results showed that this concentration may cause histopathological, biochemical and physiological changes in R. quelen.
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Affiliation(s)
- M Mela
- Departamento de Farmacologia, Universidade Federal do Paraná, Curitiba, PR, Brazil.
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Forgacs AL, D’Souza ML, Huhtaniemi IT, Rahman NA, Zacharewski TR. Triazine Herbicides and Their Chlorometabolites Alter Steroidogenesis in BLTK1 Murine Leydig Cells. Toxicol Sci 2013; 134:155-67. [DOI: 10.1093/toxsci/kft096] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Alavanja MCR, Ross MK, Bonner MR. Increased cancer burden among pesticide applicators and others due to pesticide exposure. CA Cancer J Clin 2013; 63:120-42. [PMID: 23322675 DOI: 10.3322/caac.21170] [Citation(s) in RCA: 187] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
A growing number of well-designed epidemiological and molecular studies provide substantial evidence that the pesticides used in agricultural, commercial, and home and garden applications are associated with excess cancer risk. This risk is associated both with those applying the pesticide and, under some conditions, those who are simply bystanders to the application. In this article, the epidemiological, molecular biology, and toxicological evidence emerging from recent literature assessing the link between specific pesticides and several cancers including prostate cancer, non-Hodgkin lymphoma, leukemia, multiple myeloma, and breast cancer are integrated. Although the review is not exhaustive in its scope or depth, the literature does strongly suggest that the public health problem is real. If we are to avoid the introduction of harmful chemicals into the environment in the future, the integrated efforts of molecular biology, pesticide toxicology, and epidemiology are needed to help identify the human carcinogens and thereby improve our understanding of human carcinogenicity and reduce cancer risk.
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Affiliation(s)
- Michael C R Alavanja
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, North Bethesda, MD 20892, USA.
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Lin Z, Dodd CA, Filipov NM. Differentiation state-dependent effects of in vitro exposure to atrazine or its metabolite diaminochlorotriazine in a dopaminergic cell line. Life Sci 2012; 92:81-90. [PMID: 23142650 DOI: 10.1016/j.lfs.2012.10.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 10/19/2012] [Accepted: 10/30/2012] [Indexed: 10/27/2022]
Abstract
AIMS This study sought to determine the impact of in vitro exposure to the herbicide atrazine (ATR) or its major mammalian metabolite diaminochlorotriazine (DACT) on dopaminergic cell differentiation. MAIN METHODS N27 dopaminergic cells were exposed for 24 or 48 h to ATR or DACT (12-300 μM) and their effects on cell viability, ATP levels, ADP:ATP ratio and differentiation markers, such as soma size and neurite outgrowth, were assessed. KEY FINDINGS Overall, intracellular ATP levels and soma size (decreased by ATR at ≥12 μM; 48 h) were the two parameters most sensitive to ATR exposure in undifferentiated and differentiating dopaminergic cells, respectively. At the morphological level, ATR, but not DACT, increased the percentage of morphologically abnormal undifferentiated N27 cells. On the other hand, exposure to DACT (300 μM; 48 h), but not ATR, increased the ADP:ATP ratio regardless of the differentiation state and it moderately disrupted thin neurite outgrowth. Only the highest concentration of ATR or DACT (300 μM) was cytotoxic after a longer exposure (48 h) and undifferentiated N27 cells were the least sensitive to the cytotoxic effects of ATR or DACT. SIGNIFICANCE Our results suggest that the energy perturbation and morphological disruption of dopaminergic neuronal differentiation induced by ATR and, to a lesser extent, DACT, may be associated with reported neurological deficits caused by developmental ATR exposure in rodents.
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Affiliation(s)
- Zhoumeng Lin
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
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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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Rajkovic V, Kovac R, Koledin I, Matavulj M. Atrazine-induced changes in the myocardial structure of peripubertal rats. Toxicol Ind Health 2012; 30:250-8. [PMID: 22903171 DOI: 10.1177/0748233712456058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The aim of the present study was to investigate the effect of atrazine (6-chloro-N(2)-ethyl-N(4)-isopropyl-1,3,5-triazine-2,4-diamine) on the left ventricle myocardium in juvenile/peripubertal male Wistar rats. Atrazine was administered orally at 50 or 200 mg/kg of body weight dose for 28 consecutive days. In order to assess possible structural alterations, tissue sections were examined histologically and then subjected to quantification analysis using stereological methods. The tissue specimens were routinely processed and stained with Mallory trichrome method in order to clearly distinguish muscle cells from the connective tissue components. A toluidine blue staining method was additionally used for the demonstration of mast cells. Statistically significant increase in length density and numerical density of capillaries were found at both the investigated doses of atrazine compared with the control. The increase in surface density and volume density of capillaries found at lower dosage of atrazine was significant in comparison with the control. The extensive mast cell degranulation was noted on the histological examination at both doses of the applied chemical. No significant changes were demonstrated for the stereological parameters of cardiomyocytes. Based on the available published data and the present results, it can be concluded that atrazine promoted angiogenesis in the rat myocardium, which might be partially mediated by mast cells.
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Affiliation(s)
- Vesna Rajkovic
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
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Campos-Pereira FD, Oliveira CA, Pigoso AA, Silva-Zacarin ECM, Barbieri R, Spatti EF, Marin-Morales MA, Severi-Aguiar GDC. Early cytotoxic and genotoxic effects of atrazine on Wistar rat liver: a morphological, immunohistochemical, biochemical, and molecular study. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2012; 78:170-177. [PMID: 22153302 DOI: 10.1016/j.ecoenv.2011.11.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 11/04/2011] [Accepted: 11/16/2011] [Indexed: 05/31/2023]
Abstract
Risk assessments suggest that intermediate and long-term exposure to triazine herbicides and its metabolites through water can cause severe damage to human health. The objective of this study was to investigate the possible effects of atrazine on Wistar rats submitted to subacute treatment. For this purpose, the activity of catalase and alanine aminotransferase was quantified, and the effect of the herbicide on cell membranes was examined based on the measurement of lipid peroxidation and consequent formation of malondialdehyde and on the mRNA expression of antioxidant enzymes (Mn-superoxide dismutase [SOD] and GSTM1) and connexins. In addition, we evaluated histopathological alterations in the liver, cellular expression of SOD and glutathione (GST), activation of heat shock proteins (HSPs) by immunohistochemistry, and the induction of apoptosis. The genotoxic potential of the herbicide was investigated by the micronucleus test in bone marrow smears. Adult male Wistar rats were treated with an aqueous solution of atrazine at a concentration of 400mg/kg/day, by gavage, for 14 consecutive days. Control groups were also included. The results showed an increase of catalase levels and maintenance of the expression of antioxidant enzymes (SOD and GST). In addition, lipid peroxidation, hepatic tissue degeneration, activation of HSP90, increased levels of connexin mRNA, and genotoxicity were observed. In conclusion, atrazine induced early hepatic oxidative stress that triggered defense mechanisms to maintain the morphophysiological integrity of the liver. Further studies are needed to better understand the effects of this herbicide on human health.
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Affiliation(s)
- Franco D Campos-Pereira
- Programa de Pós-Graduação em Ciências Biomédicas, Centro Universitário Hermínio Ometto, UNIARARAS, Avenida Dr. Maximiliano Barutto, no 500, Jd. Universitário, CEP 13607-339 Araras, São Paulo, Brazil
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Rajkovic V, Djolai M, Matavulj M. Alterations in jejunal morphology and serotonin-containing enteroendocrine cells in peripubertal male rats associated with subchronic atrazine exposure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2011; 74:2304-2309. [PMID: 21839517 DOI: 10.1016/j.ecoenv.2011.07.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 06/20/2011] [Accepted: 07/24/2011] [Indexed: 05/31/2023]
Abstract
The effect of atrazine on jejunum was investigated by histopathological examination and quantification analysis related to the morphological parameters of the jejunum. The experiment was performed on male Wistar rats from postnatal day 23-51. Atrazine was administered by gavage daily to one group of rats at 50 mg/kg of body weight (bw) dose, to the second at 200 mg/kg bw while the third group was the control. At the end of the experiments after 28 days of treatment, tissue samples were routinely processed and stained with haematoxylin eosin. Additionally, the histochemical staining with periodic acid Schiff-alcian blue was used to demonstrate goblet cells and the immunohistochemistry protocol for serotonin-containing enteroendocrine cells. A significant decrease in the height of epithelial cells covering the intestinal villi, the villus height to total mucosa thickness ratio and the villus height to crypt depth ratio was found at both doses of atrazine. The crypt depth, total mucosa thickness and the thickness of tunica muscularis were significantly increased by the high dose of atrazine only. The number of serotonin-positive endocrine cells significantly decreased in rats treated with the low dose of atrazine. Overall, these results suggest the alterations in intestinal absorption and support the role of atrazine as an endocrine-disrupting compound.
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Affiliation(s)
- Vesna Rajkovic
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 2, Novi Sad, Serbia.
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Abstract
BACKGROUND Atrazine (2-chloro-4-ethytlamino-6-isopropylamine-1,3,5-triazine; ATR), is the most commonly applied broad-spectrum herbicide in the world. Unintentional overspray of ATR poses an immune function health hazard. The biomolecular mechanisms responsible for ATR-induced immunotoxicity, however, are little understood. This study presents on our investigation into the apoptosis of splenocytes in mice exposed to ATR as we explore possible immunotoxic mechanisms. METHODS Oral doses of ATR were administered to BALB/C mice for 21 days. The histopathology, lymphocyte apoptosis and the expression of apoptosis-related proteins from the Fas/Fas ligand (FasL) apoptotic pathway were examined from spleen samples. RESULTS Mice administered ATR exhibited a significant decrease in spleen and thymus weight. Electron microscope histology of ultrathin sections of spleen revealed degenerative micromorphology indicative of apoptosis of splenocytes. Flow cytometry revealed that the percentage of apoptotic lymphocytes increased in a dose-dependent manner after ATR treatment. Western blots identified increased expression of Fas, FasL and active caspase-3 proteins in the treatment groups. CONCLUSIONS ATR is capable of inducing splenocytic apoptosis mediated by the Fas/FasL pathway in mice, which could be the potential mechanism underlying the immunotoxicity of ATR.
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