101
|
Still MB, Lea AM, Hofmann HA, Ryan MJ. Multimodal stimuli regulate reproductive behavior and physiology in male túngara frogs. Horm Behav 2019; 115:104546. [PMID: 31233717 DOI: 10.1016/j.yhbeh.2019.06.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/14/2019] [Accepted: 06/19/2019] [Indexed: 11/23/2022]
Abstract
Unlike in terrestrial animals, the boundary between internal (e.g., hormones) and external (e.g., social) stimulation can be blurred for aquatic and amphibious species. When chemicals such as hormones and glandular secretions leach into the water, they can further interact with other signaling systems, creating multimodal stimuli. It is unclear, however, whether water-borne chemical secretions from courting male frogs affect the physiology and behavior of their rivals. In order to address this question we first established non-invasive, continuous sampling methods for simultaneously measuring both hormones and behavior in amphibious species. Then, we examined whether interactions between water-borne chemical secretions and conspecific calls affect reproductive behavior and physiology (testosterone and corticosterone) of courting male túngara frogs. Our results demonstrate that conspecific acoustic stimulation alone increases locomotor activity, decreases latency to call, and increases calling behavior but does not alter the amount of hormones excreted. In response to water containing chemical secretions from rivals, but in the absence of calls from other males, males excrete more testosterone. Interestingly, the combined acoustic and chemical stimulus causes a multiplicative increase in both calling behavior and hormonal excretion. Taken together, our results suggest that a multimodal chemical-acoustic stimulus physiologically primes males for aggressive behavior.
Collapse
Affiliation(s)
- Meghan B Still
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA.
| | - Amanda M Lea
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Hans A Hofmann
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA; Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA; Institute for Neuroscience, University of Texas at Austin, Austin, TX 78712, USA
| | - Michael J Ryan
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA; Smithsonian Tropical Research Institute, Balboa Ancon, Panama
| |
Collapse
|
102
|
Yoon DS, Park JC, Park HG, Lee JS, Han J. Effects of atrazine on life parameters, oxidative stress, and ecdysteroid biosynthetic pathway in the marine copepod Tigriopus japonicus. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 213:105213. [PMID: 31200332 DOI: 10.1016/j.aquatox.2019.05.015] [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: 05/03/2019] [Revised: 05/25/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
Atrazine is a widely used pesticide which acts as an endocrine disruptor in various organisms. The aim of this study was to investigate adverse effects of atrazine on life parameters, oxidative stress, and ecdysteroid biosynthetic pathway in the marine copepod Tigriopus japonicus. In T. japonicus, no mortality was shown in response to atrazine up to 20 mg/L in acute toxicity assessment. In nauplii, retardation in the growth and prolonged molting and metamorphosis resulted under chronic exposure of atrazine at 20 mg/L. In addition, body sizes of T. japonicus nauplii were significantly decreased (P < 0.01 in length and P < 0.001 in width) in response to 20 mg/L of atrazine. Furthermore, atrazine induced oxidative stress by the generation of reactive oxygen species at all concentrations compared to the control in the nauplii. Also, significant increase in glutathione-S transferase activity was observed in adult T. japonicus at low concentration of atrazine. To understand effects of atrazine on ecdysteroid biosynthetic pathway-involved genes (e.g., neverland, CYP307E1, CYP306A1, CYP302A1, CYP3022A1 [CYP315A1], CYP314A1, and CYP18D1) were examined with mRNA expressions of ecdysone receptor (EcR) and ultraspiracle (USP) in response to 20 mg/L atrazine in nauplii and adults. In the nauplii, these genes were significantly downregulated (P < 0.05) in response to atrazine, compared to the control but not in the adult T. japonicus. These results suggest that atrazine can interfere in vivo life parameters by oxidative stress-induced retrogression and ecdysteroid biosynthetic pathway in this species.
Collapse
Affiliation(s)
- Deok-Seo Yoon
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jun Chul Park
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Heum Gi Park
- Department of Marine Resource Development, College of Life Sciences, Gangneung-Wonju National University, Gangneung 25457, South Korea
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
| | - Jeonghoon Han
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
| |
Collapse
|
103
|
Asouzu Johnson J, Ihunwo A, Chimuka L, Mbajiorgu EF. Cardiotoxicity in African clawed frog (Xenopus laevis) sub-chronically exposed to environmentally relevant atrazine concentrations: Implications for species survival. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 213:105218. [PMID: 31203168 DOI: 10.1016/j.aquatox.2019.06.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 05/30/2019] [Accepted: 06/01/2019] [Indexed: 06/09/2023]
Abstract
The toxic effects of different atrazine concentrations on tadpoles and adult male African clawed frogs (Xenopus laevis) were assessed in a controlled laboratory environment following 90 days' exposure. The aim was to elucidate the danger of atrazine exposure on the cardiac tissue relative to its critical function of rhythmic contractility, fundamental for optimal blood circulation and homeostasis. Tadpoles and adult frogs were exposed to 0 μg/L (control), 0.01 μg L-1, 200 μg L-1 and 500 μg L-1 concentrations of atrazine for 90 days. Mortality was concenration-dependent and significantly increased in juvenile group (77%, 43%, 23% and 0 respectively for 500 μg L-1, 200 μg L-1, 0.01 μg L-1, and control group). While the mean juvenile heart area decreased concentration-dependently, adult frog mean heart area significantly increased in the 200 μg L-1 group only and mean heart weight change was variable across all exposure levels. Light microscopy of hematoxylin and eosin (H&E) and Mallory-Heidenhain rapid one-step staining techniques on cardiac tissue sections of the juvenile and adult frogs revealed shrinkage of cardiac muscle cells into thin wavy myocytes. Additionally, disorganized branching of muscle fibres with reduced striations were observed in 0.01 μg L-1 and 200 μg L-1 but hypertrophied myocytes, thickened intensely staining myofibrils in the 500 μg L-1 group in juvenile and adult frogs. Significant increase in the mean percentage area of connective tissue in all the treated groups (p < 0.036) were also recorded. Immunohistochemistry analysis showed decreased eNOS localization in cardiac tissue in 200 μg L-1 and 500 μg L-1 of both juvenile and adult group, suggestive of decreased cardiac contractility due to atrazine exposure. The results indicate that environmentally relevant atrazine concentrations cause significant mortality in tadpoles while concentrations ≥200 μg L-1 adversely affect cardiac muscle morphology and may induce functional perturbations in cardiac tissue contractility and consequent dysfunction which generally may have an adverse impact on their survival and longevity.
Collapse
Affiliation(s)
- Jaclyn Asouzu Johnson
- School of Anatomical Sciences, University of the Witwatersrand, P Bag 3, Wits, 2050, Johannesburg, South Africa.
| | - Amadi Ihunwo
- School of Anatomical Sciences, University of the Witwatersrand, P Bag 3, Wits, 2050, Johannesburg, South Africa
| | - Luke Chimuka
- School of Chemistry, University of the Witwatersrand, P Bag 3, Wits, 2050, Johannesburg, South Africa
| | - Ejikeme F Mbajiorgu
- School of Anatomical Sciences, University of the Witwatersrand, P Bag 3, Wits, 2050, Johannesburg, South Africa
| |
Collapse
|
104
|
Wang F, Yang QW, Zhao WJ, Du QY, Chang ZJ. Effects of short-time exposure to atrazine on miRNA expression profiles in the gonad of common carp (Cyprinus carpio). BMC Genomics 2019; 20:587. [PMID: 31315571 PMCID: PMC6636164 DOI: 10.1186/s12864-019-5896-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 06/11/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Atrazine is widely used in agriculture and is a known endocrine disrupting chemical. Atrazine can seep into the water body through surface, posing a potential threat to the aquatic ecological environment and human drinking water source. In vertebrate, studies have shown that it can affect reproduction and development seriously, but its molecular mechanism for aquatic animals is unknown. Aquaculture is very common in China, especially common carp, whose females grow faster than males. However, the effects of atrazine on the reproduction of carp, especially miRNA, have not been investigated. RESULTS In this study, common carp (Cyprinus carpio) at two key developmental stages were exposed to atrazine in vitro. Sex ratio was observed to analyze the effect of atrazine on the sex. MiRNA expression profiles were analysed to identify miRNAs related to gonad development and to reveal the atrazine mechanisms interfering with gonad differentiation. The results showed that the sex ratio was biased towards females. Atrazine exposure caused significant alteration of multiple miRNAs. Predicted targets of differently-expressed miRNAs were involved in many reproductive biology signalling pathways. CONCLUSIONS Our results indicate that atrazine promoted the expression of female-biased genes by decreasing miRNAs in primordial gonad. In addition, our results indicate that atrazine can up-regulate aromatase expression through miRNAs, which supports the hypothesis that atrazine has endocrine-disrupting activity by altering the gene expression profile of the Hypothalamus-Pituitary-Gonad axis through its corresponding miRNAs.
Collapse
Affiliation(s)
- Fang Wang
- College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, People's Republic of China
| | - Qian-Wen Yang
- College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, People's Republic of China
| | - Wen-Jie Zhao
- College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, People's Republic of China
| | - Qi-Yan Du
- College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, People's Republic of China
| | - Zhong-Jie Chang
- College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, People's Republic of China.
| |
Collapse
|
105
|
Shoaie N, Daneshpour M, Azimzadeh M, Mahshid S, Khoshfetrat SM, Jahanpeyma F, Gholaminejad A, Omidfar K, Foruzandeh M. Electrochemical sensors and biosensors based on the use of polyaniline and its nanocomposites: a review on recent advances. Mikrochim Acta 2019; 186:465. [PMID: 31236681 DOI: 10.1007/s00604-019-3588-1] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 06/06/2019] [Indexed: 12/12/2022]
Abstract
Polyaniline and its composites with nanoparticles have been widely used in electrochemical sensor and biosensors due to their attractive properties and the option of tuning them by proper choice of materials. The review (with 191 references) describes the progress made in the recent years in polyaniline-based biosensors and their applications in clinical sensing, food quality control, and environmental monitoring. A first section summarizes the features of using polyaniline in biosensing systems. A subsequent section covers sensors for clinical applications (with subsections on the detection of cancer cells and bacteria, and sensing of glucose, uric acid, and cholesterol). Further sections discuss sensors for use in the food industry (such as for sulfite, phenolic compounds, acrylamide), and in environmental monitoring (mainly pesticides and heavy metal ions). A concluding section summarizes the current state, highlights some of the challenges currently compromising performance in biosensors and nanobiosensors, and discusses potential future directions. Graphical abstract Schematic presentation of electrochemical sensor and biosensors applications based on polyaniline/nanoparticles in various fields of human life including medicine, food industry, and environmental monitoring. The simultaneous use of suitable properties polyaniline and nanoparticles can provide the fabrication of sensing systems with high sensitivity, short response time, high signal/noise ratio, low detection limit, and wide linear range by improving conductivity and the large surface area for biomolecules immobilization.
Collapse
Affiliation(s)
- Nahid Shoaie
- Department of Biotechnology, Tarbiat Modares University of Medical Science, P.O. Box 14115-111, Tehran, Iran
| | - Maryam Daneshpour
- Biotechnology Department, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, P.O. Box: 1985717443, Iran
| | - Mostafa Azimzadeh
- Medical Nanotechnology & Tissue Engineering Research Center, Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, PO Box: 89195-999, Yazd, Iran.,Stem Cell Biology Research Center, Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, P.O. Box: 89195-999, Iran.,Department of Advanced Medical Sciences and Technologies, School of Paramedicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Sara Mahshid
- Department of Bioengineering, McGill University, Montreal, Quebec, P.O. Box: H3A 0E9, Canada
| | - Seyyed Mehdi Khoshfetrat
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Science, Tehran, P.O. Box:1411713137, Iran.,Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Jahanpeyma
- Department of Biotechnology, Tarbiat Modares University of Medical Science, P.O. Box 14115-111, Tehran, Iran
| | - Alieh Gholaminejad
- Department of Biotechnology, Tarbiat Modares University of Medical Science, P.O. Box 14115-111, Tehran, Iran
| | - Kobra Omidfar
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Science, Tehran, P.O. Box:1411713137, Iran. .,Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - Mehdi Foruzandeh
- Department of Biotechnology, Tarbiat Modares University of Medical Science, P.O. Box 14115-111, Tehran, Iran.
| |
Collapse
|
106
|
LeviRam I, Gross A, McCarthy D, Herzberg M. Real-time analysis of atrazine biodegradation and sessile bacterial growth: A quartz crystal microbalance with dissipation monitoring study. CHEMOSPHERE 2019; 225:871-879. [PMID: 30904767 DOI: 10.1016/j.chemosphere.2019.03.054] [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: 06/14/2018] [Revised: 02/10/2019] [Accepted: 03/10/2019] [Indexed: 06/09/2023]
Abstract
Biodegradation is a fundamental process for removal of the environmentally prevalent herbicide, atrazine, from contaminated waters. Biodegradation is more efficient when bacteria are attached on surface of an adsorbing carrier that supports the microbial population. However, for various reasons, biodegradation is almost always monitored in the liquid phase. In this study, we employ a novel Quartz Crystal Microbalance with Dissipation technique (QCM-D) for continuous, real-time monitoring of the attachment of atrazine-degrading bacteria to the surface, atrazine adsorption and degradation, and the consequent proliferation of the irreversibly attached sessile bacteria. The effect of atrazine biodegradation was observed in a batch mode of operation, in which a significant frequency decrease of the piezoelectric sensor was observed in the QCM-D, due to the proliferation of atrazine-degrading bacteria on the expense of atrazine. The latter was confirmed microscopically. Results also suggest that the viscoelastic properties of the atrazine-degrading consortium immediately changed in response to the presence of atrazine, whereas those of the non-degrading consortium were not affected. Importantly though, atrazine adsorption was similar regardless of the sessile consortia layers. When the QCM-D flow cell was exposed to a continuous flow of saturated atrazine solution, the degrading consortium layer was significantly more fluidic compared to batch mode conditions. The magnitude and kinetics of atrazine adsorption, which were monitored using QCM-D, were higher on bacterial cells comparing to the pristine, polystyrene-coated sensor. Findings from the current study can improve bioremediation design and open an avenue for studies on biodegradation and adsorption of micro-pollutants using QCM-D technology.
Collapse
Affiliation(s)
- Inbar LeviRam
- Ben-Gurion University of the Negev, Jacob Blaustein Institutes for Desert Research, Zuckerberg Institute for Water Research, Albert Katz International School for Desert Studies, Sede Boqer Campus, Israel
| | - Amit Gross
- Ben-Gurion University of the Negev, Jacob Blaustein Institutes for Desert Research, Zuckerberg Institute for Water Research, Albert Katz International School for Desert Studies, Sede Boqer Campus, Israel
| | - David McCarthy
- Environmental and Public Health Microbiology Laboratory (EPHM Lab), Department of Civil Engineering, Monash University, Clayton, Vic, Australia
| | - Moshe Herzberg
- Ben-Gurion University of the Negev, Jacob Blaustein Institutes for Desert Research, Zuckerberg Institute for Water Research, Albert Katz International School for Desert Studies, Sede Boqer Campus, Israel.
| |
Collapse
|
107
|
Gouveia D, Almunia C, Cogne Y, Pible O, Degli-Esposti D, Salvador A, Cristobal S, Sheehan D, Chaumot A, Geffard O, Armengaud J. Ecotoxicoproteomics: A decade of progress in our understanding of anthropogenic impact on the environment. J Proteomics 2019; 198:66-77. [DOI: 10.1016/j.jprot.2018.12.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 11/19/2018] [Accepted: 12/05/2018] [Indexed: 12/18/2022]
|
108
|
Holásková I, Elliott M, Brundage K, Lukomska E, Schafer R, Barnett JB. Long-term Immunotoxic Effects of Oral Prenatal and Neonatal Atrazine Exposure. Toxicol Sci 2019; 168:497-507. [PMID: 30629250 PMCID: PMC6432865 DOI: 10.1093/toxsci/kfz005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Atrazine and its metabolites are present at high concentrations in many water supplies in agro-intensive areas. Because residents in these areas drink water from sources fed from these contaminated supplies, we investigated the long-term immunotoxicity of combined prenatal and neonatal (perinatal) exposure to atrazine via drinking water, on the immune system in mice. At 6 months of age, upon immunization with heat-killed Streptococcus pneumoniae, the serum IgG antibody response against the T independent antigen phosphorylcholine was significantly higher in male, but not female, atrazine-exposed mice as compared with that in untreated controls. No alterations were present in all offspring in the serum antibody response against the T-dependent antigen pneumococcal surface protein A (PspA). ELISpot analysis showed only a small, insignificant reduction in PspA-specific IgG producing splenocytes in atrazine-treated male offspring. Interestingly, upon ex vivo stimulation with anti-CD3 and anti-CD28 antibodies, significant decreases in interleukin (IL)-2, tumor necrosis factor-α, interferon-γ, and IL-17A and a decreasing trend in IL-10 were observed in splenocytes from atrazine-exposed male, but not female mice. Analysis of thymic and splenic cell populations showed no effects of atrazine exposure in either sex. This is the first time that long-term changes in the immune response were observed after a perinatal exposure to atrazine and it demonstrates that these early life exposures can result in permanent changes to the immune system as well as a male bias in these effects.
Collapse
Affiliation(s)
- Ida Holásková
- Department of Microbiology, Immunology and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia 26506
| | - Meenal Elliott
- Department of Microbiology, Immunology and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia 26506
| | - Kathleen Brundage
- Department of Microbiology, Immunology and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia 26506
- West Virginia University Cancer Institute, Morgantown, West Virginia 26506
| | - Ewa Lukomska
- Department of Microbiology, Immunology and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia 26506
| | - Rosana Schafer
- Department of Microbiology, Immunology and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia 26506
| | - John B Barnett
- Department of Microbiology, Immunology and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia 26506
- West Virginia University Cancer Institute, Morgantown, West Virginia 26506
| |
Collapse
|
109
|
Hoskins TD, Dellapina M, Papoulias DM, Boone MD. Effects of larval atrazine exposure in mesocosms on Blanchard's cricket frogs (Acris blanchardi) reared through overwintering and to reproductive age. CHEMOSPHERE 2019; 220:845-857. [PMID: 33395806 DOI: 10.1016/j.chemosphere.2018.12.112] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 12/14/2018] [Accepted: 12/15/2018] [Indexed: 06/12/2023]
Abstract
We exposed Blanchard's cricket frog (Acris blanchardi) tadpoles to atrazine in simulated aquatic communities (outdoor mesocosms) at nominal concentrations of 0, 1, 10, 100, and 200 μg/L and tracked the effects of exposure to spring emergence in the laboratory, as well as to reproductive age in outdoor, terrestrial enclosures. We tested hypotheses that 1) atrazine addition increases the prevalence and intensity of testicular ova (TO) among phenotypic males at metamorphosis and after overwintering, 2) atrazine reduces maturation of ova after overwintering among phenotypic females, and 3) atrazine alters mass, time, and survival to metamorphosis, as well as growth and survival across terrestrial life stages. Atrazine addition increased probability of TO presence at metamorphosis, but only when treatments were pooled and compared to the control, where background atrazine was detected. Atrazine did not influence the intensity of TO among metamorphs. We observed TO among males at spring emergence and at reproductive age regardless of exposure concentration. We found no evidence for effects of exposure on gonadal maturation among females after overwintering. Exposure to 200 μg/L reduced survival to metamorphosis, but atrazine did not affect mass at metamorphosis, time to metamorphosis, or survival or mass after overwintering. We demonstrate that atrazine addition can increase TO prevalence relative to background rates at metamorphosis and that TO are also present among phenotypic males after overwintering. We suggest that this non-model species is sensitive to effects of larval EDC exposures on gonadal development and morphology and that further work with cricket frogs is warranted.
Collapse
|
110
|
Lin Z, Zhen Z, Liang Y, Li J, Yang J, Zhong L, Zhao L, Li Y, Luo C, Ren L, Zhang D. Changes in atrazine speciation and the degradation pathway in red soil during the vermiremediation process. JOURNAL OF HAZARDOUS MATERIALS 2019; 364:710-719. [PMID: 30412844 DOI: 10.1016/j.jhazmat.2018.04.037] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/20/2018] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
Atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) is a triazine herbicide intensively used in agricultural production and is often detected in different environmental matrices at concentrations above the permitted limit. This study investigated the influence of two earthworm species (epigeic Eisenia foetida and endogeic Amynthas robustus) on atrazine speciation and the degradation pathway. Our results revealed that both earthworms significantly accelerated atrazine degradation in a 28-day vermiremediation, and the residual atrazine declined from 4.23 ± 0.21 mg/kg in bulk soils to 0.51 ± 0.29 mg/kg (E. foetida) and 0.43 ± 0.19 mg/kg (A. robustus). By consuming organic matter (from 40.37 ± 1.14 to 36.31 ± 1.55 and 34.59 ± 1.13 g/kg for E. foetida and A. robustus) and neutralizing the soil pH (from 5.37 ± 0.27 to 6.36 ± 0.11 and 6.61 ± 0.30 for E. foetida and A. robustus), both earthworms reduced humus-fixed atrazine and increased the available atrazine. The percentage of available atrazine increased from 8.80 ± 0.21% in bulk soil to 10.30 ± 0.29% and 16.42 ± 0.18% in the vermiremediation treatments. Both earthworms promoted the hydroxyatrazine pathway by consuming soil organic matter and encouraged the deethylatrazine/deisopropylatrazine pathway by neutralizing the soil pH. Our findings unravel a new mechanism of vermiremediation by improving the soil physical-chemical properties and altering the atrazine degradation pathway, providing new insights into the influential factors on atrazine bioremediation in red soil.
Collapse
Affiliation(s)
- Zhong Lin
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, PR China
| | - Zhen Zhen
- Agriculture College, Guangdong Ocean University, Zhanjiang, 524088, PR China
| | - Yanqiu Liang
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, PR China
| | - Jin Li
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, PR China
| | - Jiewen Yang
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, PR China
| | - Laiyuan Zhong
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, PR China
| | - Lirong Zhao
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, PR China
| | - Yongtao Li
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China
| | - Chunling Luo
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, PR China
| | - Lei Ren
- Agriculture College, Guangdong Ocean University, Zhanjiang, 524088, PR China.
| | - Dayi Zhang
- School of Environment, Tsinghua University, Beijing, 100084, PR China.
| |
Collapse
|
111
|
Lambert MR, Tran T, Kilian A, Ezaz T, Skelly DK. Molecular evidence for sex reversal in wild populations of green frogs ( Rana clamitans). PeerJ 2019; 7:e6449. [PMID: 30775188 PMCID: PMC6369831 DOI: 10.7717/peerj.6449] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 01/15/2019] [Indexed: 12/12/2022] Open
Abstract
In vertebrates, sex determination occurs along a continuum from strictly genotypic (GSD), where sex is entirely guided by genes, to strictly environmental (ESD), where rearing conditions, like temperature, determine phenotypic sex. Along this continuum are taxa which have combined genetic and environmental contributions to sex determination (GSD + EE), where some individuals experience environmental effects which cause them to sex reverse and develop their phenotypic sex opposite their genotypic sex. Amphibians are often assumed to be strictly GSD with sex reversal typically considered abnormal. Despite calls to understand the relative natural and anthropogenic causes of amphibian sex reversal, sex reversal has not been closely studied across populations of any wild amphibian, particularly in contrasting environmental conditions. Here, we use sex-linked molecular markers to discover sex reversal in wild populations of green frogs (Rana clamitans) inhabiting ponds in either undeveloped, forested landscapes or in suburban neighborhoods. Our work here begins to suggest that sex reversal may be common within and across green frog populations, occurring in 12 of 16 populations and with frequencies of 2–16% of individuals sampled within populations. Additionally, our results also suggest that intersex phenotypic males and sex reversal are not correlated with each other and are also not correlated with suburban land use. While sex reversal and intersex are often considered aberrant responses to human activities and associated pollution, we found no such associations here. Our data perhaps begin to suggest that, relative to what is often suggested, sex reversal may be a relatively natural process in amphibians. Future research should focus on assessing interactions between genes and the environment to understand the molecular and exogenous basis of sex determination in green frogs and in other amphibians.
Collapse
Affiliation(s)
- Max R Lambert
- Department of Environmental Science, Policy, and Management, UC Berkeley, Berkeley, CA, USA
| | - Tien Tran
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, USA
| | | | - Tariq Ezaz
- Institute for Applied Ecology, University of Canberra, Bruce, ACT, Australia
| | - David K Skelly
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, USA
| |
Collapse
|
112
|
Zhang H, He J, Li N, Gao N, Du Q, Chen B, Chen F, Shan X, Ding Y, Zhu W, Wu Y, Tang J, Jia X. Lipid accumulation responses in the liver of Rana nigromaculata induced by perfluorooctanoic acid (PFOA). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 167:29-35. [PMID: 30292973 DOI: 10.1016/j.ecoenv.2018.09.120] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/26/2018] [Accepted: 09/27/2018] [Indexed: 05/22/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a perfluorinated compound that is widely distributed, is persistent in the environment, and has a low-level chronic exposure effect on human health. The aim of this study was to investigate the peroxisome proliferator activated receptors γ (PPARγ) and the sterol regulatory element-binding protein 2 (SREBP2) signaling pathways in regulating the lipid damage response to PFOA in the livers of amphibians. Male and female frogs (Rana nigromaculata) were exposed to 0, 0.01, 0.1, 0.5 and 1 mg/L PFOA. After treatment, we evaluated the pathological changes in the liver by Oil Red O, staining and examined the total cholesterol (T-CHO) and triglyceride (TG) contents. The mRNA expression levels of PPARγ, Fatty acid synthase (FAS), Acetyl-CoA carboxylase (ACC), Glycerol-3-phosphate acyltransferase (GPAT), SREBP2 and 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) were measured by quantitative real-time polymerase chain reaction (qRT-PCR). The administration of PFOA caused marked lipid accumulation damage in the amphibian livers. The T-CHO contents were elevated significantly after PFOA treatment; these results show a dose-dependent manner in both sexes. The TG content showed a significant increase in male livers, while it was elevated significantly in female livers. The RT-PCR results showed that the mRNA expression levels of PPARγ, ACC, FAS, GPAT, SREBP2 and HMG-CoA were significantly dose-dependently increased in the PFOA-treated groups compared with those of the control group. Our results demonstrated that PFOA-induced lipid accumulation also affected the expression levels of genes FAS, ACC, GPAT and HMG-CoA in the PPARγ and SREBP2 signaling pathways in the liver. These finding will provide a scientific theoretical basis for the protection of Rana nigromaculata against PFOA effects.
Collapse
Affiliation(s)
- Hangjun Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China; Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou 510632, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, Zhejiang Province 310036, China
| | - Jianbo He
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Ning Li
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Nana Gao
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Qiongxia Du
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Bin Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Feifei Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Xiaodong Shan
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Ying Ding
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, Zhejiang Province 310036, China
| | - Weiqin Zhu
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou, Zhejiang Province 310036, China
| | - Yingzhu Wu
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Juan Tang
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China
| | - Xiuying Jia
- College of Life and Environmental Sciences, Hangzhou Normal University, Xuelin Road 16#, Xiasha Gaojiao Dongqu, Hangzhou, Zhejiang Province 310036, China.
| |
Collapse
|
113
|
Calfumán K, Honores J, Isaacs M, Quezada D, Valdebenito J, Urzúa M. Quick and Easy Modification of Glassy Carbon Electrodes with Ionic Liquid and Tetraruthenated Porphyrins for the Electrochemical Determination of Atrazine in Water. ELECTROANAL 2019. [DOI: 10.1002/elan.201800771] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Karla Calfumán
- Núcleo de Química y Bioquímica, Facultad de Estudios InterdisciplinariosUniversidad Mayor Camino La Piramide #5750 Huechuraba Chile
| | - Jessica Honores
- Facultad de Química, Departamento de Química InorgánicaPontificia Universidad Católica de Chile Av. Vicuña Mackenna #4860 Macul Chile
| | - Mauricio Isaacs
- Facultad de Química, Departamento de Química InorgánicaPontificia Universidad Católica de Chile Av. Vicuña Mackenna #4860 Macul Chile
| | - Diego Quezada
- Facultad de Química y Biología, Departamento de Química de MaterialesUniversidad de Santiago de Chile Av. Libertador Bernardo O'Higgins #3363 Estacion Central Chile
| | - Javier Valdebenito
- Facultad de Ciencias, Departamento de QuímicaUniversidad de Chile Las Palmeras #3425 Ñuñoa Chile
| | - Marcela Urzúa
- Facultad de Ciencias, Departamento de QuímicaUniversidad de Chile Las Palmeras #3425 Ñuñoa Chile
| |
Collapse
|
114
|
Pitombeira de Figueirêdo L, Daam MA, Mainardi G, Mariën J, Espíndola ELG, van Gestel CAM, Roelofs D. The use of gene expression to unravel the single and mixture toxicity of abamectin and difenoconazole on survival and reproduction of the springtail Folsomia candida. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:342-350. [PMID: 30352348 DOI: 10.1016/j.envpol.2018.10.077] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/09/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
Pesticides risk assessments have traditionally focused on the effects on standard parameters, such as mortality, reproduction and development. However, one of the first signs of adverse effects that occur in organisms exposed to stress conditions is an alteration in their genomic expression, which is specific to the type of stress, sensitive to very low contaminant concentrations and responsive in a few hours. The aim of the present study was to evaluate the single and binary mixture toxicity of commercial products of abamectin (Kraft® 36 EC) and difenoconazole (Score® 250 EC) to Folsomia candida. Laboratory toxicity tests were conducted to access the effects of these pesticides on springtail survival, reproduction and gene expression. The reproduction assays gave EC50 and EC10 values, respectively, of 6.3 and 1.4 mg a.s./kg dry soil for abamectin; 1.0 and 0.12 mg a.s./kg dry soil for Kraft® 36 EC; and 54 and 23 mg a.s./kg dry soil for Score® 250 EC. Technical difenoconazole did not have any effect at the concentrations tested. No significant differences in gene expression were found between the abamectin concentrations tested (EC10 and EC50) and the solvent control. Exposure to Kraft® 36 EC, however, significantly induced Cyp6 expression at the EC50 level, while VgR was significantly downregulated at both the EC10 and EC50. Exposure to the simple pesticide mixture of Kraft® 36 EC + Score® 250 EC caused significant up regulation of ABC transporter, and significant down regulation of VgR relative to the controls. GABA receptor also showed significant down-regulation between the EC10 and EC50 mixture treatments. Results of the present study demonstrate that pesticide-induced gene expression effects precede and occur at lower concentrations than organism-level responses. Integrating "omic" endpoints in traditional bioassays may thus be a promising way forward in pesticide toxicity evaluations.
Collapse
Affiliation(s)
- Livia Pitombeira de Figueirêdo
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil; Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands.
| | - Michiel A Daam
- CENSE, Department of Environmental Sciences and Engineering, Faculty of Sciences and Technology, New University of Lisbon, Quinta da Torre, 2829-516, Caparica, Portugal
| | - Giulia Mainardi
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
| | - Janine Mariën
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
| | - Evaldo L G Espíndola
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Cornelis A M van Gestel
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
| | - Dick Roelofs
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
| |
Collapse
|
115
|
Fan Y, Yue X, Xue F, Cui J, Brauth SE, Tang Y, Fang G. Auditory perception exhibits sexual dimorphism and left telencephalic dominance in Xenopus laevis. Biol Open 2018; 7:7/12/bio035956. [PMID: 30509903 PMCID: PMC6310876 DOI: 10.1242/bio.035956] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Sex differences in both vocalization and auditory processing have been commonly found in vocal animals, although the underlying neural mechanisms associated with sexual dimorphism of auditory processing are not well understood. In this study we investigated whether auditory perception exhibits sexual dimorphism in Xenopus laevis. To do this we measured event-related potentials (ERPs) evoked by white noise (WN) and conspecific calls in the telencephalon, diencephalon and mesencephalon respectively. Results showed that (1) the N1 amplitudes evoked in the right telencephalon and right diencephalon of males by WN are significantly different from those evoked in females; (2) in males the N1 amplitudes evoked by conspecific calls are significantly different from those evoked by WN; (3) in females the N1 amplitude for the left mesencephalon was significantly lower than for other brain areas, while the P2 and P3 amplitudes for the right mesencephalon were the smallest; in contrast these amplitudes for the left mesencephalon were the smallest in males. These results suggest auditory perception is sexually dimorphic. Moreover, the amplitude of each ERP component (N1, P2 and P3) for the left telencephalon was the largest in females and/or males, suggesting that left telencephalic dominance exists for auditory perception in Xenopus. Summary: Investigation of auditory neural mechanisms in the South African clawed frog (Xenopus laevis) indicates that auditory perception exhibits sexual dimorphism and left telencephalic advantage.
Collapse
Affiliation(s)
- Yanzhu Fan
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan, People's Republic of China.,University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People's Republic of China
| | - Xizi Yue
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan, People's Republic of China
| | - Fei Xue
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, 26 Panda Road, Northern Suburb, Chengdu, Sichuan 610081, People's Republic of China
| | - Jianguo Cui
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan, People's Republic of China
| | - Steven E Brauth
- Department of Psychology, University of Maryland, College Park, MD20742, USA
| | - Yezhong Tang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan, People's Republic of China
| | - Guangzhan Fang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan, People's Republic of China
| |
Collapse
|
116
|
Guo R, Zhang W, Yang Y, Ding J, Yang W, Zhang Y. Variation of fitness and reproductive strategy in male Bufo raddei under environmental heavy metal pollution. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 164:253-260. [PMID: 30121500 DOI: 10.1016/j.ecoenv.2018.08.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/08/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Abstract
Environmental pollution is known to adversely affect amphibian reproduction and survival, however, the knowledge of environmental heavy metal pollution on fitness of male amphibian is largely unknown. The present study aimed to explore the variation in fitness of male Bufo raddei, a widespread anuran in northwest China, subjected to long-term heavy metal stress in Baiyin (BY) city. BY is heavily polluted by heavy metals mainly copper, zinc, lead and cadmium; meanwhile, Liujiaxia (LJX), a relatively unpolluted area, was chosen as control. Differences in advertisement call, larynx size, breeding glands size, as well as forearm force during courtship and amplexus in male B. raddei between the two populations were analyzed. The results revealed a competitive advantage in advertisement call in BY population, together with larger breeding glands size and forearm force, which demonstrated a relatively higher fitness. Using skeletochronological analysis, we found that more than 40% of males from BY began to breed at 2 years old, which was only 6.93% for males from LJX. Correspondingly, the average age for all males participate in breeding was younger from BY than from LJX. Not surprisingly, males from BY showed a relatively lower body condition. All these results illustrated males from BY invested more in reproduction to increase fitness at the cost of health and survival. This reproductive trade-off might ultimately influence stability of B. raddei population because of the environmental heavy metal pollution.
Collapse
Affiliation(s)
- Rui Guo
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, PR China
| | - Wenya Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, PR China.
| | - Ying Yang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, PR China
| | - Jian Ding
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, PR China
| | - Wenzhi Yang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, PR China
| | - Yingmei Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou, PR China.
| |
Collapse
|
117
|
Bartolomeu M, Neves MGPMS, Faustino MAF, Almeida A. Wastewater chemical contaminants: remediation by advanced oxidation processes. Photochem Photobiol Sci 2018; 17:1573-1598. [PMID: 30328883 DOI: 10.1039/c8pp00249e] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Approximately 70% of the terrestrial area is covered with water, but only a small water fraction is compatible with terrestrial life forms. Due to the increment in human consumption, the need for water resources is increasing, and it is estimated that more than 40% of the population worldwide will face water stress/scarcity within the next few decades. Water recycling and reuse may offer the opportunity to expand water resources. For that, the wastewater treatment paradigm should be changed and adequately treated wastewater should be seen as a valuable resource instead of a waste product. It is easily understandable that the exact composition and constituent concentration of wastewater vary according to its different sources (industrial, agricultural, urban usage of water). Consequently, a variety of known and emerging pollutants like heavy metals, antibiotics, pesticides, phthalates, polyaromatic hydrocarbons, halogenated compounds and endocrine disruptors have been found in natural water reservoirs, due to the limited effectiveness of conventional wastewater treatment. The conventional approach consists of a combination of physical, chemical and biological processes, aiming at the removal of large sediments such as heavier solids, scum and grease and of organic content in order to avoid the growth of microorganisms and eutrophication of the receiving water bodies. However, this approach is not sufficient to reduce the chemical pollutants and much less the emerging chemical pollutants. In this review, after some considerations concerning chemical pollutants and the problematic efficiency of their removal by conventional methods, an update is presented on the successes and challenges of novel approaches for wastewater remediation based on advanced oxidation processes. An insight into wastewater remediation involving the photodynamic approach mediated by tetrapyrrolic derivatives will be underlined.
Collapse
Affiliation(s)
- M Bartolomeu
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - M G P M S Neves
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - M A F Faustino
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - A Almeida
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| |
Collapse
|
118
|
Reddy SB, Nolan CJ, Plautz CZ. Disturbances in reproduction and expression of steroidogenic enzymes in aquatic invertebrates exposed to components of the herbicide Roundup. TOXICOLOGY RESEARCH AND APPLICATION 2018. [DOI: 10.1177/2397847318805276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Exposure of organisms to environmental contaminants is a growing concern. We have investigated the effects of the individual active ingredients of the herbicide Roundup (glyphosate and diquat dibromide [DD]) since Roundup causes alterations in reproduction, mortality, and development in the aquatic snail Lymnaea palustris. Snails chronically treated with elevated but ecologically relevant levels of DD exhibit reduction in fecundity ( p < 0.05), while fecundity in glyphosate-treated snails is comparable to or exceeds control levels. To investigate a possible mechanism for the reproductive disturbance, we monitored levels of steroid acute regulatory (StAR) protein in whole snails and observed a correlation in StAR protein decrease with treatment with Roundup, glyphosate, or DD. We detect StAR in organs where steroid biosynthesis occurs (ovotestis, brain, kidney); StAR protein is reduced following chronic exposure to Roundup, glyphosate, or DD ( p < 0.01). Estradiol and testosterone concentrations in hemolymph were measured by enzyme-linked immunosorbent assay following 3-week exposure of snails to 3.5 mg/L glyphosate or 140 µg/L DD. Testosterone levels decrease in DD-treated groups ( p < 0.05); a trend of lower testosterone is also observed in glyphosate-treated groups ( p > 0.05). Estradiol concentration is greater than or equal to control levels in glyphosate, but decreased in DD ( p < 0.05). Because of its role in the conversion of testosterone to estradiol, we monitored abundance of aromatase and observed a reduction ( p < 0.05) in DD-treated snails (consistent with the drop in fecundity and estradiol levels) and a comparable level to control in glyphosate-treated snails (consistent with their high fecundity and estradiol levels). Although the toxicity of commercially-available Roundup to aquatic animals may have many contributing factors including its inactive surfactant, the constituent of Roundup associated with the greatest reproductive disturbances and observed developmental abnormalities of offspring is DD. This study details the analysis of particular herbicide constituents and their effect on specific targets in the reproductive pathway.
Collapse
Affiliation(s)
- Sneha B Reddy
- Department of Biology, Shepherd University, Shepherdstown, West Virginia, USA
| | - Colleen J Nolan
- Department of Biology, Shepherd University, Shepherdstown, West Virginia, USA
| | - Carol Zygar Plautz
- Department of Biology, Shepherd University, Shepherdstown, West Virginia, USA
| |
Collapse
|
119
|
Xu X, Zarecki R, Medina S, Ofaim S, Liu X, Chen C, Hu S, Brom D, Gat D, Porob S, Eizenberg H, Ronen Z, Jiang J, Freilich S. Modeling microbial communities from atrazine contaminated soils promotes the development of biostimulation solutions. ISME JOURNAL 2018; 13:494-508. [PMID: 30291327 DOI: 10.1038/s41396-018-0288-5] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 09/10/2018] [Accepted: 09/14/2018] [Indexed: 12/26/2022]
Abstract
Microbial communities play a vital role in biogeochemical cycles, allowing the biodegradation of a wide range of pollutants. The composition of the community and the interactions between its members affect degradation rate and determine the identity of the final products. Here, we demonstrate the application of sequencing technologies and metabolic modeling approaches towards enhancing biodegradation of atrazine-a herbicide causing environmental pollution. Treatment of agriculture soil with atrazine is shown to induce significant changes in community structure and functional performances. Genome-scale metabolic models were constructed for Arthrobacter, the atrazine degrader, and four other non-atrazine degrading species whose relative abundance in soil was changed following exposure to the herbicide. By modeling community function we show that consortia including the direct degrader and non-degrader differentially abundant species perform better than Arthrobacter alone. Simulations predict that growth/degradation enhancement is derived by metabolic exchanges between community members. Based on simulations we designed endogenous consortia optimized for enhanced degradation whose performances were validated in vitro and biostimulation strategies that were tested in pot experiments. Overall, our analysis demonstrates that understanding community function in its wider context, beyond the single direct degrader perspective, promotes the design of biostimulation strategies.
Collapse
Affiliation(s)
- Xihui Xu
- Department of Microbiology, Key Lab of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.,Newe Ya'ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay, 30095, Israel
| | - Raphy Zarecki
- Newe Ya'ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay, 30095, Israel
| | - Shlomit Medina
- Newe Ya'ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay, 30095, Israel
| | - Shany Ofaim
- Newe Ya'ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay, 30095, Israel.,Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Xiaowei Liu
- Department of Microbiology, Key Lab of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chen Chen
- Department of Microbiology, Key Lab of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shunli Hu
- Department of Microbiology, Key Lab of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Dan Brom
- Newe Ya'ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay, 30095, Israel
| | - Daniella Gat
- Department of Environmental Hydrology and Microbiology, The Zuckerberg Institute for Water Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Sede-Boqer, 8499000, Israel
| | - Seema Porob
- Department of Environmental Hydrology and Microbiology, The Zuckerberg Institute for Water Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Sede-Boqer, 8499000, Israel
| | - Hanan Eizenberg
- Newe Ya'ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay, 30095, Israel
| | - Zeev Ronen
- Department of Environmental Hydrology and Microbiology, The Zuckerberg Institute for Water Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Sede-Boqer, 8499000, Israel
| | - Jiandong Jiang
- Department of Microbiology, Key Lab of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Shiri Freilich
- Newe Ya'ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay, 30095, Israel.
| |
Collapse
|
120
|
Sposito JCV, Montagner CC, Casado M, Navarro-Martín L, Jut Solórzano JC, Piña B, Grisolia AB. Emerging contaminants in Brazilian rivers: Occurrence and effects on gene expression in zebrafish (Danio rerio) embryos. CHEMOSPHERE 2018; 209:696-704. [PMID: 29960196 DOI: 10.1016/j.chemosphere.2018.06.046] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/04/2018] [Accepted: 06/05/2018] [Indexed: 05/24/2023]
Abstract
Emerging contaminants (ECs) are synthetic or naturally occurring chemicals that are not commonly monitored despite having the potential of entering the environment and causing adverse ecological and/or human health effects. This study aimed to determine whether ECs are present in the surface waters of two rivers in Mato Grosso do Sul State, Brazil, and evaluate the effects of ECs mixtures at environmentally relevant concentrations on zebrafish (Danio rerio) gene expression. ECs concentrations were determined using solid-phase extraction and liquid chromatography-mass spectrometry. The ECs most frequently detected were caffeine, imidacloprid, 2-hydroxy atrazine, tebuthiuron, atrazine, and bisphenol A. We used these data to reconstruct ECs mixtures reflecting environmental concentrations, codenamed T1, T2, and T3. No effects were observed, so the concentrations were increased. After a preliminary evaluation of the No Observed Effect Concentration for each mixture, we analyzed changes in the expression of zebrafish target genes (cyp1a, hsp70, cat, sod1, tsh, cyp19a1a, cyp19a1b, cyp26b1, casp8, sox2, cyb561d2, and thrb). cat was overrepresented in T1 and underrepresented in the other treatments. All of the mixtures induced the expression of cyp19a1b, which is a marker for (xeno-)estrogen exposure, and two of them increased the expression of cyp1a, which is used to indicate the presence of dioxin-like compounds. The rivers studied had low EC concentrations, and there was no indication of any harmful effects on the zebrafish. However, intensive agricultural activity may result in unsuspected peaks of EC pollution, and subsequent negative effects on living organisms.
Collapse
Affiliation(s)
- Juliana C V Sposito
- Faculty of Exact Sciences and Technology, Federal University of Grande Dourados/UFGD, Dourados, MS, Brazil
| | - Cassiana C Montagner
- Environmental Chemistry Laboratory, Institute of Chemistry, University of Campinas, Campinas, São Paulo, Brazil
| | - Marta Casado
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Laia Navarro-Martín
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
| | | | - Benjamin Piña
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Alexeia B Grisolia
- Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados/UFGD, Dourados, MS, Brazil.
| |
Collapse
|
121
|
Bagavathiannan MV, Davis AS. An ecological perspective on managing weeds during the great selection for herbicide resistance. PEST MANAGEMENT SCIENCE 2018; 74:2277-2286. [PMID: 29569406 DOI: 10.1002/ps.4920] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 03/14/2018] [Accepted: 03/16/2018] [Indexed: 05/10/2023]
Abstract
More than 70 years after modern agriculture declared a 'war on weeds', they continue to thrive and suppress crop yields. Viewing weeds as an enemy that can be defeated if only a powerful enough technology can be deployed is a losing proposition. The latest evidence for the inadequacy of this approach, rampant evolution of multiple herbicide-resistant weed genotypes and dwindling options for chemical control in many production systems, should be seen as an urgent message to all those concerned with the science and practice of weed management: we need another way of thinking about the weed resistance issue. Fortunately, the theoretical and practical foundation of this alternative approach, ecological weed management, has been in development for decades. Here, we use Barry Commoner's laws of ecology as a conceptual frame for a review of some of the fundamental concepts of ecological weed management. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
| | - Adam S Davis
- United States Department of Agriculture-Agricultural Research Service, Global Change and Photosynthesis Research Unit, Urbana, Illinois, USA
| |
Collapse
|
122
|
Boone MD. An amphibian with a contracting range is not more vulnerable to pesticides in outdoor experimental communities than common species. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2699-2704. [PMID: 30035389 DOI: 10.1002/etc.4236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/02/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
In areas with heavy pesticide use, it is easy to attribute population declines to environmental contamination. The Blanchard's cricket frogs (Acris blanchardi) is an amphibian experiencing declines and range contractions across its distribution in the Midwest Corn Belt (USA). Experimental studies suggest that cricket frogs are sensitive to pesticides, but there are few studies examining this species' susceptibility to contaminants in realistic environments or comparing relative impacts with other anuran species. I reared 3 summer breeding anurans in outdoor mesocosms posthatching through metamorphosis to examine the effects of 2 insecticides (imidacloprid and carbaryl) and 1 herbicide (glyphosate with polyoxyethylene tallow amine) on larval development and metamorphosis. Cricket frogs were positively affected by insecticide exposure, likely a result of changes in the food web that increased food abundance. However, metamorphosis of green frogs (Lithobates clamitans) and gray tree frogs (Hyla chrysoscelis) appeared unaffected by pesticide exposure. The results of the present study suggest that the impacts of pesticides alone are unlikely to have population-level impacts for the anurans examined. Environ Toxicol Chem 2018;37:2699-2704. © 2018 SETAC.
Collapse
|
123
|
Ma K, Wu H, Li P, Li B. LC3-II may mediate ATR-induced mitophagy in dopaminergic neurons through SQSTM1/p62 pathway. Acta Biochim Biophys Sin (Shanghai) 2018; 50:1047-1061. [PMID: 30084861 DOI: 10.1093/abbs/gmy091] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/05/2018] [Indexed: 11/12/2022] Open
Abstract
Atrazine (2-chloro-4-ethylamino-6-isopropylamine-1,3,5-triazine; ATR) has been demonstrated to regulate autophagy- and apoptosis-related proteins in doparminergic neuronal damage. In our study, we investigated the role of LC3-II in ATR-induced degeneration of dopaminergic neurons. In vivo dopaminergic neuron degeneration model was set up with ATR treatment and confirmed by the behavioral responses and pathological analysis. Dopaminergic neuron cells were transfected with LC3-II siRNA and treated with ATR to observe cell survival and reactive oxygen species release. The process of mitochondrial autophagy and the neurotoxic effects of mitochondrial autophagy were detected by immunofluorescence assay, immunohistochemical analysis, real-time PCR, and western blot analysis. Results showed that after ATR treatment, the grip strength of Wistar rats was significantly decreased, and behavioral signs of anxiety were clearly observed. The mRNA and protein levels of tyrosine hydroxylase, LC3-II, PINK1, and Parkin were significantly decreased in ATR-induced rat dopaminergic neurons and PC-12 cells, while the mRNA expression and protein levels of SQSTM1/p62 and Parl were increased. Exposure to ATR also led to accumulation of autophagic lysosomes and autophagic bodies along with significantly decreased levels of dopaminergic neurons and alterations in mitochondrial homeostasis, which was reversed by LC3-II siRNA. Our results suggest that ATR affects the mitochondria-mediated dopaminergic neuronal death, which may be mediated by LC3-II and other autophagy markers in vivo and in vitro through SQSTM1/p62 signaling pathway.
Collapse
Affiliation(s)
- Kun Ma
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
| | - Haoyu Wu
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
| | - Peng Li
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
| | - Baixiang Li
- Department of Hygienic Toxicology, Public Health College, Harbin Medical University, Harbin, China
| |
Collapse
|
124
|
Removal of atrazine by photoelectrocatalytic process under sunlight using WN-codoped TiO2 photoanode. J APPL ELECTROCHEM 2018. [DOI: 10.1007/s10800-018-1253-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
125
|
Atrazine Contamination of Drinking Water and Adverse Birth Outcomes in Community Water Systems with Elevated Atrazine in Ohio, 2006⁻2008. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15091889. [PMID: 30200320 PMCID: PMC6164008 DOI: 10.3390/ijerph15091889] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 11/17/2022]
Abstract
Atrazine, a common water contaminant in the U.S., has been associated with adverse birth outcomes in previous studies. This study aimed to determine if atrazine concentrations in drinking water are associated with adverse birth outcomes including small for gestational age (SGA), term low birth weight (term LBW), very low birth weight (VLBW), preterm birth (PTB), and very preterm birth (VPTB). This study included 14,445 live singleton births from Ohio communities served by 22 water systems enrolled in the U.S. Environmental Protection Agency's Atrazine Monitoring Program between 2006 and 2008. Mean gestational and trimester-specific atrazine concentrations were calculated. Significantly increased odds of term LBW birth was associated with atrazine exposure over the entire gestational period (OR 1.27, 95% CI 1.10, 1.45), as well as the first (OR 1.20, 95% CI 1.08, 1.34) and second trimesters (OR 1.13, 95% CI 1.07, 1.20) of pregnancy. We observed no evidence of an association between atrazine exposure via drinking water and SGA, VLBW, PTB, or VPTB. Our results suggest that atrazine exposure is associated with reduced birth weight among term infants and that exposure to atrazine in drinking water in early and mid-pregnancy may be most critical for its toxic effects on the fetus.
Collapse
|
126
|
Horzmann KA, Reidenbach LS, Thanki DH, Winchester AE, Qualizza BA, Ryan GA, Egan KE, Hedrick VE, Sobreira TJP, Peterson SM, Weber GJ, Wirbisky-Hershberger SE, Sepúlveda MS, Freeman JL. Embryonic atrazine exposure elicits proteomic, behavioral, and brain abnormalities with developmental time specific gene expression signatures. J Proteomics 2018; 186:71-82. [PMID: 30012420 PMCID: PMC6193558 DOI: 10.1016/j.jprot.2018.07.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/29/2018] [Accepted: 07/02/2018] [Indexed: 02/06/2023]
Abstract
Atrazine (ATZ), the second most commonly used herbicide in the United States, is an endocrine disrupting chemical linked to cancer and a common drinking water contaminant. This study further investigates ATZ-related developmental toxicity by testing the following hypotheses in zebrafish: the effects of embryonic ATZ exposure are dependent on timing of exposure; embryonic ATZ exposure alters brain development and function; and embryonic ATZ exposure changes protein abundance in carcinogenesis-related pathways. After exposing embryos to 0, 0.3, 3, or 30 parts per billion (ppb) ATZ, we monitored the expression of cytochrome P450 family 17 subfamily A member 1 (cyp17a1), glyoxalase I (glo1), ring finger protein 14 (rnf14), salt inducible kinase 2 (sik2), tetratricopeptide domain 3 (ttc3), and tumor protein D52 like 1 (tpd52l1) at multiple embryonic time points to determine normal expression and if ATZ exposure altered expression. Only cyp17a1 had normal dynamic expression, but ttc3 and tpd52l1 had ATZ-related expression changes before 72 h. Larvae exposed to 0.3 ppb ATZ had increased brain length, while larvae exposed to 30 ppb ATZ were hypoactive. Proteomic analysis identified altered protein abundance in pathways related to cellular function, neurodevelopment, and genital-tract cancer. The results indicate embryonic ATZ toxicity involves interactions of multiple pathways. SIGNIFICANCE This is the first report of proteomic alterations following embryonic exposure to atrazine, an environmentally persistent pesticide and common water contaminant. Although the transcriptomic alterations in larval zebrafish with embryonic atrazine exposure have been reported, neither the time at which gene expression changes occur nor the resulting proteomic changes have been investigated. This study seeks to address these knowledge gaps by evaluating atrazine's effect on gene expression through multiple time points during embryogenesis, and correlating changes in gene expression to pathological alterations in brain length and functional changes in behavior. Finally, pathway analysis of the proteomic alterations identifies connections between the molecular changes and functional outcomes associated with embryonic atrazine exposure.
Collapse
Affiliation(s)
- Katharine A Horzmann
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Leeah S Reidenbach
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Devang H Thanki
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Anna E Winchester
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Brad A Qualizza
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Geoffrey A Ryan
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Kaitlyn E Egan
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Victoria E Hedrick
- Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, IN 47907, United States
| | - Tiago J P Sobreira
- Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, IN 47907, United States
| | - Samuel M Peterson
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | - Gregory J Weber
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States
| | | | - Maria S Sepúlveda
- Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, United States
| | - Jennifer L Freeman
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, United States; Purdue Center for Cancer Research, Purdue University, West Lafayette, IN 47907, United States.
| |
Collapse
|
127
|
An J, Choi K, Yang S, Nam K. Estimation of human-origin estrone and 17β-estradiol concentrations in the Han River, Seoul, South Korea and its uncertainty-based ecological risk characterization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 633:1148-1155. [PMID: 29758866 DOI: 10.1016/j.scitotenv.2018.03.248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/14/2018] [Accepted: 03/21/2018] [Indexed: 06/08/2023]
Abstract
Estrogens originated from humans can reach ambient water and possibly cause significant ecological risks. In this study, the quantities of human-origin estrone (E1) and 17β-estradiol (E2) in the influent and effluent of four sewer treatment plants (STPs) in Seoul, South Korea were estimated using a demographic model. A Monte Carlo simulation was used to assess the quantitative uncertainty of estimated E1 and E2 concentrations. Mean concentrations of E1 and E2 estimated for STP influents ranged from 29.5 to 38.4 and 7.5 to 9.7ng/L, respectively. Meanwhile, mean concentrations of E1 and E2 estimated for STP effluents were 4.9 to 6.6 and 0.28 to 0.36ng/L, respectively. These estimated values are similar to measured data as reported in the literatures within the range of uncertainty based on the Monte Carlo simulation. The hazard quotient (HQ) value in the main stem of the Han River was calculated to be far less than 1 because of the dilution effect of the Han River's abundant flow, indicating that most of the Han River ecosystem will not be influenced by these endogenous estrogens. With a 95% cumulative probability, HQ values in the main stem of the Han River for the Jungrang, Nanji, Tanchun, and Seonam STPs were less than 0.18, 0.07, 0.08, and 0.15, respectively. Nevertheless, HQ values >1 were observed in the vicinity of the STP outlets when using the numerical modeling. Our results show that the endocrine disruption potential of E1 and E2 around STP outlets in the main stem of the Han River must be monitored carefully.
Collapse
Affiliation(s)
- Jinsung An
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Kyungho Choi
- School of Public Health, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Seungho Yang
- Department of Urban & Environmental Research, Goyang Research Institute, 60 Taegeuk-ro, Ilsandong-gu, Goyang-si 10393, Republic of Korea
| | - Kyoungphile Nam
- Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
| |
Collapse
|
128
|
Zhang W, Lu Y, Huang L, Cheng C, Di S, Chen L, Zhou Z, Diao J. Comparison of triadimefon and its metabolite on acute toxicity and chronic effects during the early development of Rana nigromaculata tadpoles. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 156:247-254. [PMID: 29554609 DOI: 10.1016/j.ecoenv.2018.03.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 02/14/2018] [Accepted: 03/02/2018] [Indexed: 06/08/2023]
Abstract
Pesticides are one of major causes for amphibian population declines and the behavior of pesticide metabolite products to amphibians has become a rising concern. In this study, the acute toxicity and the chronic effects of triadimefon and triadimenol (the metabolite of triadimefon) on Rana. nigromaculata were investigated. In the acute assay, significant differences were observed in antioxidant enzyme activities and malondialdehyde levels between the triadimefon and triadimenol. The 96 h-acute toxicity of triadimefon (25.97 mg/L) and triadimenol (34.55 mg/L) to tadpoles was low. In 28d-chronic exposure, we studied the relative expression of tadpoles genes related to thyroid hormone-dependent metamorphic development, histological examination of liver and some biological index, including wet weight, snout-to-vent length (SVL) and development stages. The results revealed that the effects of triadimefon and triadimenol on tadpole development are driven by a disruption of the hormonal pathways involved in metamorphosis. Interestingly, triadimefon was more harmful on R. nigromaculata than triadimenol at high dose, whereas the reverse result was observed at low doses. According to the relative expression of thyroid hormone-dependent genes, we also found that the two compounds may have different mechanisms of toxic action on R. nigromaculata. Our study developed a pragmatic approach for use in the risk assessment of pesticide and its metabolite,and increased the information and understanding of the impacts of fungicides and other potential endocrine disrupting environmental contaminants on amphibians.
Collapse
Affiliation(s)
- Wenjun Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Yuele Lu
- Institute of Fermentation Engineering, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Chaowang Road 18, Hangzhou 310014, China
| | - Ledan Huang
- Beijing Institute of Fashion Technology, Yinghua Road 2, Chaoyang District, Beijing 100029, China
| | - Cheng Cheng
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Shanshan Di
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Li Chen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Zhiqiang Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China
| | - Jinling Diao
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing 100193, China.
| |
Collapse
|
129
|
Kamath D, Mezyk SP, Minakata D. Elucidating the Elementary Reaction Pathways and Kinetics of Hydroxyl Radical-Induced Acetone Degradation in Aqueous Phase Advanced Oxidation Processes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7763-7774. [PMID: 29923393 DOI: 10.1021/acs.est.8b00582] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Advanced oxidation processes (AOPs) that produce highly reactive hydroxyl radicals are promising methods to destroy aqueous organic contaminants. Hydroxyl radicals react rapidly and nonselectively with organic contaminants and degrade them into intermediates and transformation byproducts. Past studies have indicated that peroxyl radical reactions are responsible for the formation of many intermediate radicals and transformation byproducts. However, complex peroxyl radical reactions that produce identical transformation products make it difficult to experimentally study the elementary reaction pathways and kinetics. In this study, we used ab initio quantum mechanical calculations to identify the thermodynamically preferable elementary reaction pathways of hydroxyl radical-induced acetone degradation by calculating the free energies of the reaction and predicting the corresponding reaction rate constants by calculating the free energies of activation. In addition, we solved the ordinary differential equations for each species participating in the elementary reactions to predict the concentration profiles for acetone and its transformation byproducts in an aqueous phase UV/hydrogen peroxide AOP. Our ab initio quantum mechanical calculations found an insignificant contribution of Russell reaction mechanisms of peroxyl radicals, but significant involvement of HO2• in the peroxyl radical reactions. The predicted concentration profiles were compared with experiments in the literature, validating our elementary reaction-based kinetic model.
Collapse
Affiliation(s)
- Divya Kamath
- Department of Civil and Environmental Engineering , Michigan Technological University , Houghton , Michigan 49931 , United States
| | - Stephen P Mezyk
- Department of Chemistry and Biochemistry , California State University , Long Beach , California 90840 , United States
| | - Daisuke Minakata
- Department of Civil and Environmental Engineering , Michigan Technological University , Houghton , Michigan 49931 , United States
| |
Collapse
|
130
|
Exposure to an anti-androgenic herbicide negatively impacts reproductive physiology and fertility in Xenopus tropicalis. Sci Rep 2018; 8:9124. [PMID: 29904069 PMCID: PMC6002408 DOI: 10.1038/s41598-018-27161-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 05/02/2018] [Indexed: 12/11/2022] Open
Abstract
Amphibians are threatened on a global scale and pollutants may be contributing to population declines, but how chemicals impact on their reproduction is poorly understood. We conducted a life cycle analysis to investigate the impacts of early life exposure to two anti-androgens (exposure until completion of metamorphosis;stage 66): flutamide, (50 µg/L)/linuron (9 and 45 µg/L)) on sexual development and breeding competence in Xenopus tropicalis. Our analyses included: mRNA levels of dmrt1, cyp17, amh, cyp19, foxl2 and ar (tadpoles/metamorphs), gonadal histomorphology (metamorphs/adults), mRNA levels of ar/gr (adult male brain/gonad/forelimb), testosterone/corticosterone levels (adult males), secondary sexual characteristics (forelimb width/nuptial pad: adult males) and breeding competence (amplexus/fertility: adult males). Compared to controls, feminised sex ratios and increased number of spermatogonia (adults) were observed after exposure to flutamide and the lower linuron concentration. Exposure to the lower linuron concentration also resulted in demasculinisation of secondary sexual characteristics and reduced male fertility. Flutamide exposure resulted in masculinisation of the nuptial pad and elevated mRNA levels of dmrt1, cyp17, amh and foxl2 in brains (metamorphs). Testosterone levels were higher in all treatment groups, however, overall few effects were observed in response to the higher linuron concentration. Our findings advance understanding of reproductive biology of X. tropicalis and illustrate negative effects of linuron on reproductive processes at a concentration measured in freshwater environments.
Collapse
|
131
|
Jiang Z, Su G, Li J, Ma B, Chen Y, Shan D, Zhang Y. Toxicological sensitivity of Pennisetum americanum (L.) K. Schum to atrazine exposure. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:635-642. [PMID: 28318303 DOI: 10.1080/15226514.2017.1303806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The tolerance of Pennisetum americanum (L.) K Schum (P. americanum) to the herbicide atrazine, as well as the atrazine accumulation in exposed plants, was investigated in this study. The germination of P. americanum seeds was not significantly inhibited by exposure to atrazine at concentrations below 100 mg·L-1. The roots of the seedlings were much more sensitive to atrazine than the shoots were, as shown by observations that shoot and root elongation were significantly inhibited by treatment with 100 and 50 mg·kg-1 of atrazine, respectively. In addition, significant differences were found in the dry weights of the seedling shoots and roots after exposure to 50 and 20 mg·kg-1 of atrazine, respectively. Atrazine accumulated readily in the roots of exposed seedlings, and the root ultrastructure was visibly damaged by exposure to lower levels of atrazine compared to the ultrastructure of the shoot. The contents of chlorophyll a and chlorophyll b and the transcription of psbA were inhibited by exposure to atrazine at concentrations above 20 mg·kg-1. Finally, the tolerance threshold of P. americanum to atrazine was about 20 mg·kg-1, indicating that the test plant exhibited some atrazine tolerance.
Collapse
Affiliation(s)
- Zhao Jiang
- a School of Resources and Environment , Northeast Agricultural University , Harbin , P.R. China
| | - Guangxia Su
- a School of Resources and Environment , Northeast Agricultural University , Harbin , P.R. China
| | - Jinmei Li
- a School of Resources and Environment , Northeast Agricultural University , Harbin , P.R. China
| | - Bingbing Ma
- a School of Resources and Environment , Northeast Agricultural University , Harbin , P.R. China
| | - Yukun Chen
- a School of Resources and Environment , Northeast Agricultural University , Harbin , P.R. China
| | - Dexin Shan
- a School of Resources and Environment , Northeast Agricultural University , Harbin , P.R. China
| | - Ying Zhang
- a School of Resources and Environment , Northeast Agricultural University , Harbin , P.R. China
| |
Collapse
|
132
|
Rimayi C, Odusanya D, Weiss JM, de Boer J, Chimuka L, Mbajiorgu F. Effects of environmentally relevant sub-chronic atrazine concentrations on African clawed frog (Xenopus laevis) survival, growth and male gonad development. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 199:1-11. [PMID: 29602044 DOI: 10.1016/j.aquatox.2018.03.028] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/21/2018] [Accepted: 03/22/2018] [Indexed: 06/08/2023]
Abstract
Sub-chronic toxicity of environmentally relevant atrazine concentrations on exposed tadpoles and adult male African clawed frogs (Xenopus laevis) was evaluated in a quality controlled laboratory for 90 days. The aim of this study was to determine the effects of atrazine on the survival, growth and gonad development of African clawed frogs. After exposure of tadpoles to atrazine concentrations of 0 (control), 0.01, 200 and 500 μg L-1 in water, mortality rates of 0, 0, 3.3 and 70% respectively were recorded for the 90 day exposure period. Morphometry showed significantly reduced tadpole mass in the 500 μg L-1 atrazine exposed tadpoles (p < 0.05). Light microscopy on testes of adult frogs exposed to the same atrazine concentrations using hematoxylin and eosin (H&E) and Van Gieson staining techniques revealed gonadal atrophy, disruption of germ cell lines, seminiferous tubule structure damage and formation of extensive connective tissue around seminiferous tubules of frogs exposed to 200 μg L-1 and 500 μg L-1 atrazine concentrations. Ultrastructural analysis of the cellular organelles using transmission electron microscopy (TEM) revealed significant amounts of damaged mitochondria in testosterone producing Leydig cells as well as Sertoli cells. Biochemical analysis revealed reduced serum testosterone levels in adult frogs at all exposure levels as well as presence of six atrazine metabolites in frog serum and liver. The results indicate that atrazine concentrations greater than the calculated LC50 of 343.7 μg L-1 cause significant mortality in tadpoles, while concentrations ≥200 μg L-1 adversely affect reproductive health of adult frogs and development of tadpoles sub-chronically exposed to atrazine.
Collapse
Affiliation(s)
- Cornelius Rimayi
- Department of Water and Sanitation, Resource Quality Information Services (RQIS), Roodeplaat, P. Bag X313, 0001 Pretoria, South Africa; Department of Environment and Health, Vrije Universiteit Amsterdam, De Boelelaan, 1085, 1081HV Amsterdam, The Netherlands; University of the Witwatersrand, School of Chemistry, P. Bag 3, Wits 2050, Johannesburg, South Africa.
| | - David Odusanya
- Department of Water and Sanitation, Resource Quality Information Services (RQIS), Roodeplaat, P. Bag X313, 0001 Pretoria, South Africa
| | - Jana M Weiss
- Department of Environmental Science and Analytical Chemistry, Stockholm University, Arrhenius Laboratory, 10691 Stockholm, Sweden; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07 Uppsala, Sweden
| | - Jacob de Boer
- Department of Environment and Health, Vrije Universiteit Amsterdam, De Boelelaan, 1085, 1081HV Amsterdam, The Netherlands
| | - Luke Chimuka
- University of the Witwatersrand, School of Chemistry, P. Bag 3, Wits 2050, Johannesburg, South Africa
| | - Felix Mbajiorgu
- University of the Witwatersrand, School of Anatomical Sciences, P. Bag 3, Wits 2050, Johannesburg, South Africa
| |
Collapse
|
133
|
Varanasi L, Coscarelli E, Khaksari M, Mazzoleni LR, Minakata D. Transformations of dissolved organic matter induced by UV photolysis, Hydroxyl radicals, chlorine radicals, and sulfate radicals in aqueous-phase UV-Based advanced oxidation processes. WATER RESEARCH 2018; 135:22-30. [PMID: 29454238 DOI: 10.1016/j.watres.2018.02.015] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 01/26/2018] [Accepted: 02/06/2018] [Indexed: 06/08/2023]
Abstract
Considering the increasing identification of trace organic contaminants in natural aquatic environments, the removal of trace organic contaminants from water or wastewater discharge is an urgent task. Ultraviolet (UV) and UV-based advanced oxidation processes (AOPs), such as UV/hydrogen peroxide (UV/H2O2), UV/free chlorine and UV/persulfate, are attractive and promising approaches for the removal of these contaminants due to the high reactivity of active radical species produced in these UV-AOPs with a wide variety of organic contaminants. However, the removal efficiency of trace contaminants is greatly affected by the presence of background dissolved organic matter (DOM). In this study, we use ultrahigh resolution mass spectrometry to evaluate the transformation of a standard Suwanee River fulvic acid DOM isolate in UV photolysis and UV-AOPs. The use of probe compounds allows for the determination of the steady-state concentrations of active radical species in each UV-AOP. The changes in the H/C and O/C elemental ratios, double bond equivalents, and the low-molecular-weight transformation product concentrations of organic acids reveal that different DOM transformation patterns are induced by each UV-AOP. By comparison with the known reactivities of each radical species with specific organic compounds, we mechanistically and systematically elucidate the molecular-level DOM transformation pathways induced by hydroxyl, chlorine, and sulfate radicals in UV-AOPs. We find that there is a distinct transformation in the aliphatic components of DOM due to HO• in UV/H2O2 and UV/free chlorine. Cl• induced transformation of olefinic species is also observed in the UV/free chlorine system. Transformation of aromatic and olefinic moieties by SO4•- are the predominant pathways in the UV/persulfate system.
Collapse
Affiliation(s)
- Lathika Varanasi
- Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA.
| | - Erica Coscarelli
- Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA.
| | - Maryam Khaksari
- Chemical Advanced Resolution Methods Laboratory, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA; Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA.
| | - Lynn R Mazzoleni
- Chemical Advanced Resolution Methods Laboratory, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA; Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA.
| | - Daisuke Minakata
- Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA.
| |
Collapse
|
134
|
Regnault C, Usal M, Veyrenc S, Couturier K, Batandier C, Bulteau AL, Lejon D, Sapin A, Combourieu B, Chetiveaux M, Le May C, Lafond T, Raveton M, Reynaud S. Unexpected metabolic disorders induced by endocrine disruptors in Xenopus tropicalis provide new lead for understanding amphibian decline. Proc Natl Acad Sci U S A 2018; 115:E4416-E4425. [PMID: 29686083 PMCID: PMC5948982 DOI: 10.1073/pnas.1721267115] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Despite numerous studies suggesting that amphibians are highly sensitive to endocrine disruptors (EDs), both their role in the decline of populations and the underlying mechanisms remain unclear. This study showed that frogs exposed throughout their life cycle to ED concentrations low enough to be considered safe for drinking water, developed a prediabetes phenotype and, more commonly, a metabolic syndrome. Female Xenopus tropicalis exposed from tadpole stage to benzo(a)pyrene or triclosan at concentrations of 50 ng⋅L-1 displayed glucose intolerance syndrome, liver steatosis, liver mitochondrial dysfunction, liver transcriptomic signature, and pancreatic insulin hypersecretion, all typical of a prediabetes state. This metabolic syndrome led to progeny whose metamorphosis was delayed and occurred while the individuals were both smaller and lighter, all factors that have been linked to reduced adult recruitment and likelihood of reproduction. We found that F1 animals did indeed have reduced reproductive success, demonstrating a lower fitness in ED-exposed Xenopus Moreover, after 1 year of depuration, Xenopus that had been exposed to benzo(a)pyrene still displayed hepatic disorders and a marked insulin secretory defect resulting in glucose intolerance. Our results demonstrate that amphibians are highly sensitive to EDs at concentrations well below the thresholds reported to induce stress in other vertebrates. This study introduces EDs as a possible key contributing factor to amphibian population decline through metabolism disruption. Overall, our results show that EDs cause metabolic disorders, which is in agreement with epidemiological studies suggesting that environmental EDs might be one of the principal causes of metabolic disease in humans.
Collapse
Affiliation(s)
- Christophe Regnault
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France
| | - Marie Usal
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France
| | - Sylvie Veyrenc
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France
| | | | | | - Anne-Laure Bulteau
- Institut de Génomique Fonctionnelle de Lyon, Université Lyon 1, CNRS UMR 5242, Ecole Normale Supérieure de Lyon, 69000 Lyon, France
| | - David Lejon
- Rovaltain Research Company, F-26300 Alixan, France
| | | | | | - Maud Chetiveaux
- Plate-forme Therassay, l'Institut du Thorax, INSERM, CNRS, Université de Nantes, 44007 Nantes, France
| | - Cédric Le May
- Plate-forme Therassay, l'Institut du Thorax, INSERM, CNRS, Université de Nantes, 44007 Nantes, France
| | - Thomas Lafond
- Centre de Ressources Biologiques Xénopes, Université Rennes 1, CNRS, Unité Mixte de Service 3387, 35042 Rennes, France
| | - Muriel Raveton
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France
| | - Stéphane Reynaud
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France;
| |
Collapse
|
135
|
Ali JM, Knight LA, D'Souza DL, Kolok AS. Comparing the effects of atrazine and an environmentally relevant mixture on estrogen-responsive gene expression in the northern leopard frog and the fathead minnow. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:1182-1188. [PMID: 29314190 DOI: 10.1002/etc.4069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 10/24/2017] [Accepted: 12/21/2017] [Indexed: 06/07/2023]
Abstract
In Nebraska, fish are exposed to herbicides in agricultural runoff. The study objectives were to determine 1) if fathead minnows and northern leopard frogs exposed to atrazine experience alterations in gene expression, and 2) whether these changes are elicited by a simulated herbicide mixture. Following a 7-d exposure to atrazine, female minnows were defeminized, whereas male frogs were feminized. The mixture did not elicit statistically significant effects in either species. Environ Toxicol Chem 2018;37:1182-1188. © 2018 SETAC.
Collapse
Affiliation(s)
- Jonathan M Ali
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Lindsey A Knight
- Department of Biology, University of Nebraska at Omaha, Omaha, Nebraska, USA
| | - Del L D'Souza
- Department of Biology, University of Nebraska at Omaha, Omaha, Nebraska, USA
| | - Alan S Kolok
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
- Department of Biology, University of Nebraska at Omaha, Omaha, Nebraska, USA
| |
Collapse
|
136
|
Effervescence assisted dispersive liquid-liquid microextraction based on cohesive floating organic drop for the determination of herbicides and fungicides in water and grape juice. Food Chem 2018; 245:653-658. [DOI: 10.1016/j.foodchem.2017.08.100] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 05/03/2017] [Accepted: 08/29/2017] [Indexed: 11/18/2022]
|
137
|
Kale OE, Oyesola TO, Raji FS. Celecoxib, a cyclooxygenase-2 inhibitor, offers chemoprevention against reproductive and neurobehavioural abnormalities induced by atrazine in male Wistar rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 58:84-97. [PMID: 29306822 DOI: 10.1016/j.etap.2017.12.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/26/2017] [Accepted: 12/28/2017] [Indexed: 06/07/2023]
Abstract
The cyclooxygenase-2/prostanoid pathway (COX-2) serves as a potential therapeutic target in various pathological conditions. Thus, the modulatory effect of celecoxib (CXB), a COX-2 inhibitor, in atrazine-induced toxicity was investigated. Five groups (n = 6 rats per group) of adult male Wistar rats received corn oil (2 ml/kg), atrazine (ATZ, 300 mg/kg) and CXB (5.7 mg/kg) respectively and their combinations via the oral route. Results obtained showed reduced (p < 0.05) sperm motility (25.8%) and counts (27.6%), testosterone (29.9%), luteinizing (33%) and follicle stimulating hormones (78.7%) plus elevated total cholesterol (112.3%), triglyceride (115.7%), malondialdehyde levels respectively in ATZ-treated rats. Similarly, ATZ administration causes reduced locomotion (33.6%), spontaneous motor activity (46.6%) and catalepsy effects (157.3%) respectively. However, CXB divided doses moderately reverse reproductive abnormalities, modulate neurobehavioural deficits and slightly preserved COX-2 elevation following ATZ intoxication. Furthermore, histopathology of testis shows improvement in treated rats. Overall, our data suggest chemopreventive actions via pharmacological inhibition of COX-2 activity during ATZ toxicity.
Collapse
Affiliation(s)
- O E Kale
- Department of Pharmacology, Benjamin S. Carson (Snr.) School of Medicine, Babcock University, Ilishan-Remo, Ogun State, PMB, 21244 Ikeja, Nigeria.
| | - T O Oyesola
- Department of Physiology, Benjamin S. Carson (Snr.) School of Medicine, Babcock University, Ilishan-Remo, Ogun State, PMB, 21244 Ikeja, Nigeria
| | - F S Raji
- Department of Physiology, Benjamin S. Carson (Snr.) School of Medicine, Babcock University, Ilishan-Remo, Ogun State, PMB, 21244 Ikeja, Nigeria
| |
Collapse
|
138
|
Chen L, Zhang W, Hua J, Hu C, Lok-Shun Lai N, Qian PY, Lam PKS, Lam JCW, Zhou B. Dysregulation of Intestinal Health by Environmental Pollutants: Involvement of the Estrogen Receptor and Aryl Hydrocarbon Receptor. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:2323-2330. [PMID: 29356515 DOI: 10.1021/acs.est.7b06322] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
To determine how environmental pollutants induce dysbiosis of the gut microbiota, we exposed adult zebrafish to model pollutants with varied modes of action (atrazine, estradiol, polychlorinated biphenyl [PCB]126, and PCB153) for 7 days. Subsequently, metagenomic sequencing of the intestines was performed to compare the gut microbiomes among the groups. We observed clear compound- and sex-specific responses to xenobiotic stress. Principal component analysis revealed involvement of the aryl hydrocarbon receptor (AhR) and, to a lesser extent, the estrogen receptor (ER) in the dysregulation of the intestinal microbiota. The model pollutants differentially impaired intestinal and hepatic physiological activities, as indicated by assessments of gut motility, epithelial permeability, inflammation, and oxidative stress. Correlation analysis showed that abnormal Aeromonas reproduction, especially in the PCB126 groups, was significantly positively associated with oxidative damage. Aeromonas closely interacted with Mannheimia and Blastococcus to regulate intestinal permeability. In summary, we demonstrated that ER and AhR signaling regulated the dynamics of the gut microbiota. Our findings provide new mechanistic insight into the complex interactions between the host metabolism and gut microbiota, which may contribute to the grouped assessment of environmental pollutants in future.
Collapse
Affiliation(s)
- Lianguo Chen
- State Key Laboratory in Marine Pollution, City University of Hong Kong , Kowloon, Hong Kong SAR, China
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China
| | - Weipeng Zhang
- Division of Life Science, Hong Kong University of Science and Technology , Clear Water Bay, Hong Kong SAR, China
| | - Jianghuan Hua
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China
| | - Chenyan Hu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology , Wuhan 430072, China
| | - Nelson Lok-Shun Lai
- State Key Laboratory in Marine Pollution, City University of Hong Kong , Kowloon, Hong Kong SAR, China
| | - Pei-Yuan Qian
- Division of Life Science, Hong Kong University of Science and Technology , Clear Water Bay, Hong Kong SAR, China
| | - Paul K S Lam
- State Key Laboratory in Marine Pollution, City University of Hong Kong , Kowloon, Hong Kong SAR, China
| | - James C W Lam
- State Key Laboratory in Marine Pollution, City University of Hong Kong , Kowloon, Hong Kong SAR, China
- Department of Science and Environmental Studies, The Education University of Hong Kong , Hong Kong SAR, China
| | - Bingsheng Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China
| |
Collapse
|
139
|
Ockleford C, Adriaanse P, Berny P, Brock T, Duquesne S, Grilli S, Hernandez-Jerez AF, Bennekou SH, Klein M, Kuhl T, Laskowski R, Machera K, Pelkonen O, Pieper S, Stemmer M, Sundh I, Teodorovic I, Tiktak A, Topping CJ, Wolterink G, Aldrich A, Berg C, Ortiz-Santaliestra M, Weir S, Streissl F, Smith RH. Scientific Opinion on the state of the science on pesticide risk assessment for amphibians and reptiles. EFSA J 2018; 16:e05125. [PMID: 32625798 PMCID: PMC7009658 DOI: 10.2903/j.efsa.2018.5125] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Following a request from EFSA, the Panel on Plant Protection Products and their Residues developed an opinion on the science to support the potential development of a risk assessment scheme of plant protection products for amphibians and reptiles. The coverage of the risk to amphibians and reptiles by current risk assessments for other vertebrate groups was investigated. Available test methods and exposure models were reviewed with regard to their applicability to amphibians and reptiles. Proposals were made for specific protection goals aiming to protect important ecosystem services and taking into consideration the regulatory framework and existing protection goals for other vertebrates. Uncertainties, knowledge gaps and research needs were highlighted.
Collapse
|
140
|
Martins-Santos E, Pimenta CG, Campos PRN, Oliveira AG, Mahecha GAB, Oliveira CA. Atrazine affects the morphophysiology, tissue homeostasis and aromatase expression in the efferent ductules of adult rats with mild alterations in the ventral prostate. CHEMOSPHERE 2018; 193:958-967. [PMID: 29874772 DOI: 10.1016/j.chemosphere.2017.11.124] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 11/20/2017] [Accepted: 11/22/2017] [Indexed: 06/08/2023]
Abstract
The widely used herbicide atrazine is a potent endocrine disruptor known to cause increased aromatase expression and transient increase in testicular weight followed by remarkable testis atrophy. However, whether the effects of atrazine on the testes are primary or secondary to dysfunctions in other components of male reproductive tract remains unknown. Given the high sensitivity of the efferent ductules to estrogen imbalance and the similarity to alterations previously described for other disruptors of these ductules function, and the testicular alterations observed after atrazine exposure, we hypothesized that the efferent ductules could be a target for atrazine. Herein we characterized the efferent ductules and the ventral prostate of adult Wistar rats treated with 200 mg/kg/day of atrazine for 7, 15, and 40 days. Additionally, we evaluated if the effects of atrazine in these organs could be reduced after discontinuation of the treatment. Atrazine exposure resulted in mild effects on the ventral prostate, but remarkable alterations on the efferent ductules, including luminal dilation, reduced epithelial height, and disruption of the epithelial homeostasis, which coincides with increased aromatase expression. Together with our previous data, these results suggest that at least part of the testicular effects of atrazine may be secondary to the alterations in the efferent ductules.
Collapse
Affiliation(s)
- Elisângela Martins-Santos
- Department of Morphology, Universidade Federal de Minas Gerais, Cx. Postal 486, CEP 31.270-901, Belo Horizonte, MG, Brazil
| | - Cristiano Guimarães Pimenta
- Department of Morphology, Universidade Federal de Minas Gerais, Cx. Postal 486, CEP 31.270-901, Belo Horizonte, MG, Brazil
| | - Pollyana Rabelo Nunes Campos
- Department of Morphology, Universidade Federal de Minas Gerais, Cx. Postal 486, CEP 31.270-901, Belo Horizonte, MG, Brazil
| | - André Gustavo Oliveira
- Department of Morphology, Universidade Federal de Minas Gerais, Cx. Postal 486, CEP 31.270-901, Belo Horizonte, MG, Brazil
| | | | - Cleida Aparecida Oliveira
- Department of Morphology, Universidade Federal de Minas Gerais, Cx. Postal 486, CEP 31.270-901, Belo Horizonte, MG, Brazil.
| |
Collapse
|
141
|
Hoskins TD, Boone MD. Atrazine feminizes sex ratio in Blanchard's cricket frogs (Acris blanchardi) at concentrations as low as 0.1 μg/L. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:427-435. [PMID: 29028124 DOI: 10.1002/etc.3962] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/14/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
We exposed Blanchard's cricket frogs (Acris blanchardi) to ecologically relevant concentrations (0, 0.1, 1, and 10 μg/L) of a commercial formulation of atrazine throughout the larval period to determine effects on survival, somatic growth and development (time to metamorphosis and mass at metamorphosis), and gonadal development (sex ratio at metamorphosis and the prevalence of testicular ova in phenotypic males). We tested the following hypotheses: 1) atrazine feminizes the sex ratio, 2) atrazine increases the proportion of phenotypic males with testicular ova, and 3) atrazine differentially affects somatic growth (mass at metamorphosis) and development (time to metamorphosis) for males and females. Although the control sex ratio was male-biased, exposure to 0.1 and 10 μg/L atrazine feminized sex ratios, because these treatments produced 51 and 55% fewer males than the control, respectively. We did not observe testicular ova. Atrazine did not impact survival or metamorphosis, and we did not detect sexually dimorphic impacts on time to metamorphosis or mass at metamorphosis. However, males metamorphosed 2.3 d later than females, regardless of treatment. Sex biases in timing of metamorphosis are underexplored in anurans, but if prevalent, could have important implications for theory surrounding the impact of environmental factors on metamorphosis. Our data suggest that cricket frog sex ratios are sensitive to environmentally relevant concentrations of atrazine and that feminization in the field is likely. Environ Toxicol Chem 2018;37:427-435. © 2017 SETAC.
Collapse
|
142
|
Ockleford C, Adriaanse P, Berny P, Brock T, Duquesne S, Grilli S, Hernandez-Jerez AF, Bennekou SH, Klein M, Kuhl T, Laskowski R, Machera K, Pelkonen O, Pieper S, Stemmer M, Sundh I, Teodorovic I, Tiktak A, Topping CJ, Wolterink G, Aldrich A, Berg C, Ortiz-Santaliestra M, Weir S, Streissl F, Smith RH. Scientific Opinion on the state of the science on pesticide risk assessment for amphibians and reptiles. EFSA J 2018. [PMID: 32625798 DOI: 10.2903/j.efsa.2018.5125issn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023] Open
Abstract
Following a request from EFSA, the Panel on Plant Protection Products and their Residues developed an opinion on the science to support the potential development of a risk assessment scheme of plant protection products for amphibians and reptiles. The coverage of the risk to amphibians and reptiles by current risk assessments for other vertebrate groups was investigated. Available test methods and exposure models were reviewed with regard to their applicability to amphibians and reptiles. Proposals were made for specific protection goals aiming to protect important ecosystem services and taking into consideration the regulatory framework and existing protection goals for other vertebrates. Uncertainties, knowledge gaps and research needs were highlighted.
Collapse
|
143
|
Szewczyk R, Kuśmierska A, Bernat P. Ametryn removal by Metarhizium brunneum: Biodegradation pathway proposal and metabolic background revealed. CHEMOSPHERE 2018; 190:174-183. [PMID: 28987406 DOI: 10.1016/j.chemosphere.2017.10.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/27/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Ametryn is a representative of a class of s-triazine herbicides absorbed by plant roots and leaves and characterized as a photosynthesis inhibitor. It is still in use in some countries in the farming of pineapples, soybean, corn, cotton, sugar cane or bananas; however, due to the adverse effects of s-triazine herbicides on living organisms use of these pesticides in the European Union has been banned. In the current study, we characterized the biodegradation of ametryn (100 mg L-1) by entomopathogenic fungal cosmopolite Metarhizium brunneum. Ametryn significantly inhibited the growth and glucose uptake in fungal cultures. The concentration of the xenobiotic drops to 87.75 mg L-1 at the end of culturing and the biodegradation process leads to formation of four metabolites: 2-hydroxy atrazine, ethyl hydroxylated ametryn, S-demethylated ametryn and deethylametryn. Inhibited growth is reflected in the metabolomics data, where significant differences in concentrations of L-proline, gamma-aminobutyric acid, L-glutamine, 4-hydroxyproline, L-glutamic acid, ornithine and L-arginine were observed in the presence of the xenobiotic when compared to control cultures. The metabolomics data demonstrated that the presence of ametryn in the fungal culture induced oxidative stress and serious disruptions of the carbon and nitrogen metabolism. Our results provide deeper insights into the microorganism strategy for xenobiotic biodegradation which may result in future enhancements to ametryn removal by the tested strain.
Collapse
Affiliation(s)
- Rafał Szewczyk
- Department of Industrial Microbiology and Biotechnology, Institute of Microbiology, Biotechnology and Immunology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12/16, 90-237 Łódź, Poland.
| | - Anna Kuśmierska
- Department of Industrial Microbiology and Biotechnology, Institute of Microbiology, Biotechnology and Immunology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12/16, 90-237 Łódź, Poland
| | - Przemysław Bernat
- Department of Industrial Microbiology and Biotechnology, Institute of Microbiology, Biotechnology and Immunology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12/16, 90-237 Łódź, Poland
| |
Collapse
|
144
|
Saalfeld GQ, Varela Junior AS, Castro T, Pereira FA, Gheller SMM, da Silva AC, Corcini CD, da Rosa CE, Colares EP. Low atrazine dosages reduce sperm quality of Calomys laucha mice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:2924-2931. [PMID: 29147981 DOI: 10.1007/s11356-017-0657-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 10/31/2017] [Indexed: 06/07/2023]
Abstract
Reproductive effects caused by the exposure to environmentally relevant dosages of atrazine on wild animals are poorly understood. This study evaluated the effects of three dosages of atrazine on sperm parameters of adult Calomys laucha males. Adult mice were orally exposed to dosages of 0 (water and vehicle control), 0.1, 1, and 10 mg/kg of animal weight for a 21-day period. Following exposure, analyses were performed to determine sperm motility parameters, plasma membrane integrity and fluidity, mitochondrial functionality, acrosome integrity, DNA damage, lipid peroxidation, and production of reactive oxygen species (ROS) in the sperm samples. Total and progressive motility were reduced in all dosages in comparison to control groups. Membrane integrity and mitochondrial functionality of sperm were reduced in all dosages, and the sperm membrane fluidity increased in the higher dosages of atrazine (1 and 10 mg/kg), in comparison with the vehicle control. A decrease in the acrosome integrity was noted at 10 mg/kg of atrazine, compared to the control groups. The integrity of DNA, ROS generation, and lipid peroxidation of sperm showed no significant differences when compared with the control groups. These results suggest that exposure to low dosages of atrazine can affect sperm parameters of Calomys laucha and therefore reduce the reproductive capacity of wild rodent species.
Collapse
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, 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, 96201-900, Brazil
| | - Fernanda Alves Pereira
- Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil
| | - Stela Mari Meneghello Gheller
- 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
| | - Alessandra Cardoso da Silva
- ReproPel, Faculdade de Veterinária, Campus Capão do Leão, Universidade Federal de Pelotas (UFPel), Pelotas, 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
| | - Carlos Eduardo da Rosa
- 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, 96201-900, Brazil
| | - Elton Pinto Colares
- Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, RS, Brazil
| |
Collapse
|
145
|
Gamble T, McKenna E, Meyer W, Nielsen SV, Pinto BJ, Scantlebury DP, Higham TE. XX/XY Sex Chromosomes in the South American Dwarf Gecko (Gonatodes humeralis). J Hered 2017; 109:462-468. [DOI: 10.1093/jhered/esx112] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 12/19/2017] [Indexed: 11/13/2022] Open
Affiliation(s)
- Tony Gamble
- Department of Biological Sciences, Marquette University, Milwaukee, WI
- Bell Museum of Natural History, University of Minnesota, Saint Paul, MN
- Milwaukee Public Museum, Milwaukee, WI
| | | | - Wyatt Meyer
- Department of Biological Sciences, Marquette University, Milwaukee, WI
| | - Stuart V Nielsen
- Department of Biological Sciences, Marquette University, Milwaukee, WI
| | - Brendan J Pinto
- Department of Biological Sciences, Marquette University, Milwaukee, WI
| | | | - Timothy E Higham
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, Riverside, CA
| |
Collapse
|
146
|
Komtchou S, Dirany A, Drogui P, Robert D, Lafrance P. Removal of atrazine and its by-products from water using electrochemical advanced oxidation processes. WATER RESEARCH 2017; 125:91-103. [PMID: 28837868 DOI: 10.1016/j.watres.2017.08.036] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/08/2017] [Accepted: 08/15/2017] [Indexed: 06/07/2023]
Abstract
Atrazine (ATZ) is one of the most common pesticides detected in surface water in Quebec (Canada). The present study was mainly focused on the degradation of ATZ and its by-products using electrochemical advanced oxidation processes such as photo-electro-Fenton (PEF), electro-Fenton (EF) and anodic-oxidation with simultaneous H2O2 formation (AO - H2O2). The comparison of these processes showed that PEF process was found to be the most effective process in removing ATZ and its by-products from both synthetic solution (ATZ0 = 100 μg L-1) and real agricultural surface water enriched with ATZ (ATZ0 = 10 μg L-1). Different operating parameters, including wavelength of the light, pH, current density and the presence of natural organic matter (humic acids) were investigated for PEF process using boron-doped diamond (BDD) anode and graphite cathode. The current density and the wavelength of the light were the most important parameters in the ATZ degradation efficiency. The best operating conditions were recorded for the synthetic samples at a current density of 18.2 mA cm-2, a pH of 3.0 and treatment time of 45 min. Results showed that atrazine-desethyl-desisopropyl (DEDIA) was the most important by-product recorded. More than 99% of ATZ oxidation was recorded after 15 min of treatment and all the concentrations of major by-products were less than the limit of detection after 45 min of treatment. The PEF process was also tested for real surface water contaminated by ATZ: i) with and without addition of iron; ii) without pH adjustment (pH ∼ 6.7) and with pH adjustment (pH ∼ 3.1). In spite of the presence of radical scavenger and iron complexation the PEF process was more effective to remove ATZ from real surface water when the pH value was adjusted near to 3.0. The ATZ removal was 96.0% with 0.01 mM of iron (kapp = 0.13 min-1) and 100% with 0.1 mM of iron (kapp = 0.17 min-1).
Collapse
Affiliation(s)
- Simon Komtchou
- Institut National de la Recherche Scientifique (INRS-Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
| | - Ahmad Dirany
- Institut National de la Recherche Scientifique (INRS-Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
| | - Patrick Drogui
- Institut National de la Recherche Scientifique (INRS-Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
| | - Didier Robert
- Institut de Chimie et Procédés pour l'Énergie, l'Environnement et la Santé (ICPEES), CNRS, Université de Strasbourg, rue Victor Demange, 57500, Saint-Avold, France.
| | - Pierre Lafrance
- Institut National de la Recherche Scientifique (INRS-Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
| |
Collapse
|
147
|
Yuan X, Yan X, Xu H, Li D, Sun L, Cao G, Xia D. Enhanced ozonation degradation of atrazine in the presence of nano-ZnO: Performance, kinetics and effects. J Environ Sci (China) 2017; 61:3-13. [PMID: 29191312 DOI: 10.1016/j.jes.2017.04.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 04/16/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
Enhanced ozonation degradation of atrazine (ATZ) with nano-ZnO (nZnO) as catalyst and the influences of the operational parameters have been investigated through semi-continuous experiments in this study. The results demonstrated that the combination of ozone (O3) and nZnO showed an obvious synergetic effect and the ATZ degradation conformed to pseudo-first-order kinetics. An improvement of ATZ degradation efficiency by 41.8% and pseudo-first-order rate constant by more than a factor of four was obtained in the O3/nZnO process after 5min of reaction compared to O3 alone. Meanwhile, the degradation efficiency of ATZ was gradually enhanced with increasing nZnO dosage and initial pH in the range from 3.0 to 8.0, and a higher amount of ATZ was degraded when the initial concentration of ATZ rose from 0.5 to 5mg/L. Additionally, sulfate ion, chloride ion, nitrate ion and low concentrations of humic acid substances led to enhancement of the ATZ degradation. The notable decrease of ATZ removal efficiency observed in the presence of radical scavengers and the results of free radical tests indicated that OH is the dominant active radical species. The mechanism investigation demonstrated that the enhancement effect could be attributed to the introduction of nZnO, which could promote the utilization of O3, enhance the formation of superoxide radical, and further accelerate the production of hydrogen peroxide and the generation of OH/O2-.
Collapse
Affiliation(s)
- Xiangjuan Yuan
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China.
| | - Xuan Yan
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Haiming Xu
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Dongya Li
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Lei Sun
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Gang Cao
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Dongsheng Xia
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China; Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan 430073, China.
| |
Collapse
|
148
|
Curtis AN, Bidart MG. Effects of chemical management for invasive plants on the performance of Lithobates pipiens tadpoles. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:2958-2964. [PMID: 28498523 DOI: 10.1002/etc.3859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 08/12/2016] [Accepted: 05/11/2017] [Indexed: 05/25/2023]
Abstract
Invasive plants impact amphibians by altering habitat, altering species interactions, and releasing potentially toxic secondary chemicals. Despite being costly and having the potential to affect nontarget wildlife, chemical management is commonly used to control invasive plants. Prior research has indicated that individual effects of invasive plants or herbicides can be harmful to aquatic organisms; however, information is lacking on the combined effect of these factors on amphibians. A laboratory experiment was performed to assess the impact of leachates of the invasive plants Eurasian watermilfoil (Myriophyllum spicatum) and European buckthorn (Rhamnus cathartica), the herbicide Renovate® 3 (triclopyr [3, 5, 6-trichloro-2-pyridinyloxyacetic acid]), and the combined effects of each plant leachate and the herbicide on the growth, morphology, and survival of northern leopard frog (Lithobates pipiens) tadpoles. No effects of treatment on survival were observed. Tadpole exposure to M. spicatum reduced body mass by 17%, exposure to R. cathartica increased body mass by 36%, and exposure to R. cathartica + low herbicide increased body mass by 38% (although only early in the experiment). Exposure to Renovate 3 induced a 16% and 29% decrease in tadpole size in lower (0.22 mg triclopyr active ingredient [a.i.]/L) and higher (0.92 mg triclopyr a.i./L) concentration treatments, respectively. Results from the present study highlight the importance of considering both individual and combined effects of invasive plants and herbicides because they may have different outcomes for tadpole growth and development. Environ Toxicol Chem 2017;36:2958-2964. © 2017 SETAC.
Collapse
Affiliation(s)
- Amanda N Curtis
- Department of Biological Sciences, Bowling Green State University, Bowling Green, Ohio, USA
| | - M Gabriela Bidart
- Department of Biological Sciences, Bowling Green State University, Bowling Green, Ohio, USA
| |
Collapse
|
149
|
Allan HL, van de Merwe JP, Finlayson KA, O'Brien JW, Mueller JF, Leusch FDL. Analysis of sugarcane herbicides in marine turtle nesting areas and assessment of risk using in vitro toxicity assays. CHEMOSPHERE 2017; 185:656-664. [PMID: 28728123 DOI: 10.1016/j.chemosphere.2017.07.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 07/06/2017] [Accepted: 07/07/2017] [Indexed: 06/07/2023]
Abstract
Agricultural processes are associated with many different herbicides that can contaminate surrounding environments. In Queensland, Australia, herbicides applied to agricultural crops may pose a threat to valuable coastal habitats including nesting beaches for threatened loggerhead turtles (Caretta caretta). This study 1) measured concentrations of herbicides in the beach sand of Mon Repos, an important marine turtle nesting beach in Australia that is adjacent to significant sugarcane crops, and 2) investigated the toxicity of these herbicides to marine turtles using a cell-based assay. Samples of sand from turtle nest depth and water from surrounding agricultural drains and wetlands were collected during the wet season when herbicide runoff was expected to be the greatest and turtles were nesting. Samples were extracted using solid phase extraction and extracts were analysed using chemical analysis targeting herbicides, as well as bioanalytical techniques (IPAM-assay and loggerhead turtle skin cell cytotoxicity assay). Twenty herbicides were detected in areas between sugarcane crops and the nesting beach, seven of which were also detected in the sand extracts. Herbicides present in the nearby wetland were also detected in the beach sand, indicating potential contamination of the nesting beach via the river outlet as well as ground water. Although herbicides were detected in nesting sand, bioassays using loggerhead turtle skin cells indicated a low risk of acute toxicity at measured environmental concentrations. Further research should investigate potentially more subtle effects, such as endocrine disruption and mixture effects, to better assess the threat that herbicides pose to this population of marine turtles.
Collapse
Affiliation(s)
- Hannah L Allan
- Australian Rivers Institute & Griffith School of Environment, Griffith University, Parklands Drive, Gold Coast, QLD 4222, Australia
| | - Jason P van de Merwe
- Australian Rivers Institute & Griffith School of Environment, Griffith University, Parklands Drive, Gold Coast, QLD 4222, Australia.
| | - Kimberly A Finlayson
- Australian Rivers Institute & Griffith School of Environment, Griffith University, Parklands Drive, Gold Coast, QLD 4222, Australia
| | - Jake W O'Brien
- Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 39 Kessels Rd, Coopers Plains, QLD 4108, Australia
| | - Jochen F Mueller
- Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 39 Kessels Rd, Coopers Plains, QLD 4108, Australia
| | - Frederic D L Leusch
- Australian Rivers Institute & Griffith School of Environment, Griffith University, Parklands Drive, Gold Coast, QLD 4222, Australia
| |
Collapse
|
150
|
Wedekind C. Demographic and genetic consequences of disturbed sex determination. Philos Trans R Soc Lond B Biol Sci 2017; 372:20160326. [PMID: 28760767 PMCID: PMC5540866 DOI: 10.1098/rstb.2016.0326] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2017] [Indexed: 12/17/2022] Open
Abstract
During sex determination, genetic and/or environmental factors determine the cascade of processes of gonad development. Many organisms, therefore, have a developmental window in which their sex determination can be sensitive to, for example, unusual temperatures or chemical pollutants. Disturbed environments can distort population sex ratios and may even cause sex reversal in species with genetic sex determination. The resulting genotype-phenotype mismatches can have long-lasting effects on population demography and genetics. I review the theoretical and empirical work in this context and explore in a simple population model the role of the fitness vyy of chromosomally aberrant YY genotypes that are a consequence of environmentally induced feminization. Low vyy is mostly beneficial for population growth. During feminization, low vyy reduces the proportion of genetic males and hence accelerates population growth, especially at low rates of feminization and at high fitness costs of the feminization itself (i.e. when feminization would otherwise not affect population dynamics much). When sex reversal ceases, low vyy mitigates the negative effects of feminization and can even prevent population extinction. Little is known about vyy in natural populations. The available models now need to be parametrized in order to better predict the long-term consequences of disturbed sex determination.This article is part of the themed issue 'Adult sex ratios and reproductive decisions: a critical re-examination of sex differences in human and animal societies'.
Collapse
Affiliation(s)
- Claus Wedekind
- Department of Ecology and Evolution, Biophore, University of Lausanne, 1015 Lausanne, Switzerland
| |
Collapse
|