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Wang Q, Tang J, Pan L, Song A, Miao J, Zheng X, Li Z. Study on epigenotoxicity, sex hormone synthesis, and DNA damage of benzo[a]pyrene in the testis of male Ruditapes philippinarum. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169340. [PMID: 38110097 DOI: 10.1016/j.scitotenv.2023.169340] [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: 10/29/2023] [Revised: 12/10/2023] [Accepted: 12/11/2023] [Indexed: 12/20/2023]
Abstract
Research on the mechanisms of reproductive toxicity caused by persistent organic pollutants (POPs) in marine animals has received significant attention. One group of typical POPs, called polycyclic aromatic hydrocarbons (PAHs), has been found to cause various reproductive toxicities in aquatic organisms, including epigenotoxicity, reproductive endocrine disruption, DNA damage effects and other reproductive toxicity, thereby affecting gonadal development. Interestingly, male aquatic animals are more susceptible to the disturbance and toxicity of environmental pollutants. However, current studies primarily focus on vertebrates, leaving a large gap in our understanding of the reproductive toxicity and mechanisms of PAHs interference in marine invertebrates. In this study, male Ruditapes philippinarum was used as an experimental subject to investigate reproduction-related indexes in clams under the stress of benzo[a]pyrene (B[a]P) at different concentrations (0, 0.8, 4 and 20 μg/L) during the proliferative, growth, maturity, and spawning period. We analyzed the molecular mechanisms of reproductive toxicity caused by PAHs in marine bivalves, specifically epigenotoxicity, reproductive endocrine disruption, and gonadal damage-apoptotic effect. The results suggest that DNA methylation plays a crucial role in mediating B[a]P-induced reproductive toxicity in male R. philippinarum. B[a]P may affect sex hormone levels, impede spermatogenesis and testis development in clams, by inhibiting the steroid hormone synthesis pathway and downregulating genes critical for cell proliferation, testis development, and spermatid expulsion. Moreover, the spermatids of male R. philippinarum were severely impaired under the B[a]P stress, leading to reduced reproductive performance in the clams. These findings contribute to a better understanding of the reproductive toxicity response of male marine invertebrates to POPs stress.
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Affiliation(s)
- Qiaoqiao Wang
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China
| | - Jian Tang
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China
| | - Luqing Pan
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China.
| | - Aimin Song
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China
| | - Jingjing Miao
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China
| | - Xin Zheng
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China
| | - Zeyuan Li
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, PR China
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de Oliveira AÁS, Vieira LC, Dreossi SC, Dorta DJ, Gravato C, da Silva Ferreira ME, Oliveira DPD. Integrating morphological, biochemical, behavioural, and molecular approaches to investigate developmental toxicity triggered by tebuthiuron in zebrafish (Danio rerio). CHEMOSPHERE 2023; 340:139894. [PMID: 37607599 DOI: 10.1016/j.chemosphere.2023.139894] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 08/24/2023]
Abstract
Tebuthiuron (TBU), a phenylurea herbicide, is widely applied in agricultural and non-agricultural soils. Because TBU resists degradation, it can contaminate water and reach the biota once it is released into the environment. However, the potential toxic effects of TBU on aquatic developing organisms have been poorly studied. By taking advantage of the early-life stages of zebrafish (Danio rerio), we have combined morphological, biochemical, behavioural, and molecular approaches to investigate the developmental toxicity triggered by environmentally relevant concentrations (from 0.1 to 1000 μg/L) of TBU. Exposure to TBU did not elicit morphological abnormalities but it significantly delayed hatching. In addition, TBU altered the frequency of tail coils in one-day post-fertilization (dpf) old embryos. Moreover, TBU exposure during four days significantly inhibited the whole body AChE activity of larvae. At the molecular level, TBU did not significantly affect the mRNA levels of four genes (elavl3, gfap, gap43, and shha) that play key roles during the neurodevelopment of zebrafish. By assessing the motor responses to repeated light-dark stimuli, 6 dpf larvae exposed to TBU displayed hyperactivity, showing greater travelling distance during the dark periods. Our categorization of swimming speed revealed an interesting finding - after the light was turned off, the exposed larvae abandoned the freezing mode (<2 mm/s) and travelled mainly at cruising speed (2-20 mm/s), showing that the larval hyperactivity did not translate into higher swimming velocity. Overall, our results offer new insights into the TBU toxicity to developing organisms, namely effects in AChE activity and hyperactivity, providing support data for future studies considering environmental risk assessment of this herbicide.
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Affiliation(s)
| | - Luiz Carlos Vieira
- Ribeirão Preto Medical School, University of São Paulo, 14049-900, Ribeirão Preto, Brazil
| | - Sônia Carvalho Dreossi
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, 14040-903, Ribeirão Preto, Brazil
| | - Daniel Junqueira Dorta
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), 14800-060, Araraquara, Brazil
| | - Carlos Gravato
- Faculty of Sciences, University of Lisbon, Campo Grande, 1749-016, Lisbon, Portugal
| | | | - Danielle Palma de Oliveira
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, 14040-903, Ribeirão Preto, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), 14800-060, Araraquara, Brazil
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Dcunha R, Kumari S, Najar MA, Aravind A, Suvarna KS, Hanumappa A, Mutalik SP, Mutalik S, Kalthur SG, Rajanikant GK, Siddiqui S, Alrumman S, Alamri SAM, Raghu SV, Adiga SK, Kannan N, Thottethodi Subrahmanya KP, Kalthur G. High doses of GrassOut Max poses reproductive hazard by affecting male reproductive function and early embryogenesis in Swiss albino mice. CHEMOSPHERE 2023:139215. [PMID: 37336444 DOI: 10.1016/j.chemosphere.2023.139215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/16/2023] [Accepted: 06/12/2023] [Indexed: 06/21/2023]
Abstract
Clethodim is a widely used and approved class II herbicide, with little information about its impact on the reproductive system. Herein, we investigated the male reproductive toxicity of clethodim using a mouse model. GrassOut Max (26% clethodim-equivalent) or 50 mg kg-1 body weight analytical grade clethodim (≥90%) were given orally to male mice for 10 d in varying doses. All parameters were assessed at 35 d from the first day of treatment. Significant decrease in testicular weight, decreased germ cell population, elevated DNA damage in testicular cells and lower serum testosterone level was observed post clethodim-equivalent exposure. Epididymal spermatozoa were characterized with significant decrease in motility, elevated DNA damage, abnormal morphology, chromatin immaturity and, decreased acetylated-lysine of sperm proteins. In the testicular cells of clethodim-equivalent treated mice, the expression of Erβ and Gper was significantly higher. Proteomic analysis revealed lower metabolic activity, poor sperm-oocyte binding potential and defective mitochondrial electron transport in spermatozoa of clethodim-equivalent treated mice. Further, fertilizing ability of spermatozoa was compromised and resulted in defective preimplantation embryo development. Together, our data suggest that clethodim exposure risks male reproductive function and early embryogenesis in Swiss albino mice via endocrine disrupting function.
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Affiliation(s)
- Reyon Dcunha
- Division of Reproductive Biology, Department of Reproductive Science, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Sandhya Kumari
- Division of Reproductive Biology, Department of Reproductive Science, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Mohd Altaf Najar
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Center, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Anjana Aravind
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Center, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Keerthana Sandesh Suvarna
- Division of Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Ananda Hanumappa
- Division of Reproductive Biology, Department of Reproductive Science, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Sadhana P Mutalik
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Srinivas Mutalik
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Sneha Guruprasad Kalthur
- Department of Anatomy, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - G K Rajanikant
- School of Biotechnology, National Institute of Technology Calicut, Calicut, Kerala, India
| | - Sazada Siddiqui
- Department of Biology, College of Sciences, King Khalid University, Abha, 11362, Saudi Arabia
| | - Sulaiman Alrumman
- Department of Biology, College of Sciences, King Khalid University, Abha, 11362, Saudi Arabia
| | | | - Shamprasad Varija Raghu
- Neurogenetics Lab, Department of Applied Zoology, Mangalore University, Mangalagangotri, 574199, Karnataka, India
| | - Satish Kumar Adiga
- Division of Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Nagarajan Kannan
- Division of Experimental Pathology and Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA; Center for Regenerative Medicine, Mayo Clinic, Rochester, MN, 55905, USA; Mayo Clinic Cancer Center, Mayo Clinic, Rochester, MN, 55905, USA
| | | | - Guruprasad Kalthur
- Division of Reproductive Biology, Department of Reproductive Science, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India.
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de Lima EW, Brunaldi BP, Frias YA, de Almeida Moreira BR, da Silva Alves L, Lopes PRM. A synergistic bacterial pool decomposes tebuthiuron in soil. Sci Rep 2022; 12:9225. [PMID: 35655075 PMCID: PMC9163133 DOI: 10.1038/s41598-022-13147-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 05/10/2022] [Indexed: 11/09/2022] Open
Abstract
This study aimed to propose an eco-compatible strategy to mitigate the possible environmental contamination caused by tebuthiuron. Therefore, we screened potential tebuthiuron-degrading microorganisms from conventional (CS) and no-till (NTS) systems producing sugarcane. Then, they were bioprospected for their ability of decomposing the target-molecule at 2.48 mmol g-1 and 4.96 mmol g-1 into CO2 via respirometry. Integrating microbiota from CS and NTS into an advantageously synergistic bacterial pool produced the highest specific-growth rate of CO2 of 89.60 mg day-1, so outstripped the other inoculum. The bacterial CN-NTS framework notably stabilized the sigmoidal Gompertz curve on microbial degradation earliest and enabled the seeds of Lactuca sativa to germinate healthiest throughout ecotoxicological bioassay for cross-validation. Our study is preliminary, but timely to provide knowledge of particular relevance to progress in the field's prominence in remediating terrestrial ecosystems where residual tebuthiuron can persist and contaminate. The analytical insights will act as an opening of solutions to develop high-throughput biotechnological strategies for environmental decontamination.
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Affiliation(s)
- Edivaldo Wilson de Lima
- Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (UNESP), Dracena, SP, 17900-000, Brazil
| | - Bruno Pinheiro Brunaldi
- Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (UNESP), Dracena, SP, 17900-000, Brazil
| | - Yanca Araujo Frias
- Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (UNESP), Dracena, SP, 17900-000, Brazil
| | - Bruno Rafael de Almeida Moreira
- Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (UNESP), Dracena, SP, 17900-000, Brazil
| | - Lucas da Silva Alves
- Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (UNESP), Dracena, SP, 17900-000, Brazil
| | - Paulo Renato Matos Lopes
- Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (UNESP), Dracena, SP, 17900-000, Brazil.
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Villarreal-Reyes C, Díaz de León-Martínez L, Flores-Ramírez R, González-Lara F, Villarreal-Lucio S, Vargas-Berrones KX. Ecotoxicological impacts caused by high demand surfactants in Latin America and a technological and innovative perspective for their substitution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 816:151661. [PMID: 34780823 DOI: 10.1016/j.scitotenv.2021.151661] [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: 09/14/2021] [Revised: 10/29/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
Nowadays, water pollution represents a great concern due to population growth, industrialization, and urbanization. Every day hazardous chemical products for humans and aquatic organisms are disposed of arbitrarily from homes and industries. Even though detergents are considered an essential market, there is evidence of environmental impacts caused by surfactants like nonylphenol ethoxylate (NPE) and linear alkylbenzene sulfonates (LAS). Regulations about maximum allowable concentrations in sewage, surface water, and drinking water are scarce or null, mostly in developing countries like Latin American countries. Therefore, this review explores these two common toxic surfactants (NPE and LAS) and proposes a technological, innovative, and ecological perspective on detergents. Also, it establishes a starting point for industries to minimize adverse effects on humans and environmental health caused by these compounds.
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Affiliation(s)
- Cecilia Villarreal-Reyes
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí. Av. Manuel Nava No. 6, C.P. 78260, San Luis Potosí, Mexico
| | - Lorena Díaz de León-Martínez
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, Colonia Lomas Segunda Sección, CP 78210, San Luis Potosí, Mexico
| | - Rogelio Flores-Ramírez
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, Colonia Lomas Segunda Sección, CP 78210, San Luis Potosí, Mexico
| | - Fabiola González-Lara
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí. Av. Manuel Nava No. 6, C.P. 78260, San Luis Potosí, Mexico
| | - Samantha Villarreal-Lucio
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, Colonia Lomas Segunda Sección, CP 78210, San Luis Potosí, Mexico
| | - Karla Ximena Vargas-Berrones
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí. Av. Manuel Nava No. 6, C.P. 78260, San Luis Potosí, Mexico.
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Acar Ü, İnanan BE, Navruz FZ, Yılmaz S. Alterations in blood parameters, DNA damage, oxidative stress and antioxidant enzymes and immune-related genes expression in Nile tilapia (Oreochromis niloticus) exposed to glyphosate-based herbicide. Comp Biochem Physiol C Toxicol Pharmacol 2021; 249:109147. [PMID: 34332143 DOI: 10.1016/j.cbpc.2021.109147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 07/06/2021] [Accepted: 07/17/2021] [Indexed: 02/07/2023]
Abstract
In this study, effects of different concentrations (0, 5, 10, 20, 30, and 40 mg/L) of glyphosate-based herbicide (GBH) on Nile tilapia (Oreochromis niloticus) were investigated after a 14-day of exposure. After determination of LC50 value, effects of GBH on hematological and serum biochemical parameters in blood samples, DNA damage, lipid peroxidation and catalase activity in liver tissues, expression levels of antioxidant enzyme-related genes (SOD, CAT, GPx, and GST) and immune-related genes (TGF-β, TGF-α and IL1-β) were evaluated. The LC50 value has been found as 44.4 mg/L for GBH. GBH exposure at all concentrations caused alterations in blood parameters. GBH induced oxidative stress in liver and DNA damage in blood. Antioxidant enzyme-related genes were significantly up-regulated to suppress oxidative stress. On the other hand, the expression levels of immune-related genes decreased in fish exposure to particularly ≥20 mg/L GBH.
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Affiliation(s)
- Ümit Acar
- Çanakkale Onsekiz Mart University, Bayramiç Vocational School, Department of Forestry, Çanakkale, Turkey.
| | - Burak Evren İnanan
- Aksaray University, Faculty of Veterinary Medicine, Department of Fisheries and Diseases, Aksaray, Turkey.
| | - Fahriye Zemheri Navruz
- Bartın University, Faculty of Science, Department of Molecular Biology and Genetics, Turkey
| | - Sevdan Yılmaz
- Çanakkale Onsekiz Mart University, Marine Science and Technlogy Faculty, Department of Aquaculture, Çanakkale, Turkey.
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Xie QP, Li BB, Wei FL, Yu M, Zhan W, Liu F, Lou B. Growth and gonadal development retardations after long-term exposure to estradiol in little yellow croaker, Larimichthys polyactis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 222:112462. [PMID: 34217113 DOI: 10.1016/j.ecoenv.2021.112462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 06/08/2021] [Accepted: 06/23/2021] [Indexed: 05/25/2023]
Abstract
Endocrine disrupting chemicals (EDCs) including 17β-estradiol (E2) are widely distributed in the aquatic environment and are known to negatively affect the reproductive system of many animals, including fish. EDCs leading to feminization, altered sex ratio and reduced fecundity, it is possibly posing potential risks to the ecosystems. To investigate the potentially toxic effects of E2 exposure on little yellow croaker (Larimichthys polyactis, L. poliactis) who have a unique gonadal development pattern that males undergo a hermaphroditic stage. An experiment was set up where L. poliactis were maintained in tanks and exposed to E2 concentrations of 10 μg/L or no E2 exposure (the ethanol and control groups) from 30 to 90 days post-hatching (dph). After exposure, the E2 withdrawal and continual cultured to 150 and 365 dph. The morphological and histological analyses were used to compare the changes in the fish body and gonad under E2 exposure. The results showed that E2 exposure caused three major phenotypes at 30 and 60 days after treatment (dat), including ovary, ovotestis and gonadal development retardation compared with the control groups. The average ratio of these three phenotypes is 60.6%, 11.97% and 27.43%, respectively. The body length and weight of E2 exposure groups were repressed during the E2 exposure period, while it can recover after E2 withdrawal. However, the gonadal development (Gonadosomatic Index) of E2 exposure groups testis were retarded at 60 dat and doesn't recover until 365 dph. The sex determination/differentiation-related genes erα, erβI, erβII, fshβ and cyp11b2 were significantly decreased in E2-exposure male fish. This research highlights the E2 leads to feminization, disrupts testis maturation and spermatogenesis, this effect persisted into the stage of sexual maturity. Collectively, our findings provide insights into the molecular mechanisms underlying E2 disturbance of a marine economic fish reproduction.
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Affiliation(s)
- Qing-Ping Xie
- Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Bing-Bing Li
- School of Fishery, Zhejiang Ocean University, Zhoushan 316021, China
| | - Fu-Liang Wei
- School of Fishery, Zhejiang Ocean University, Zhoushan 316021, China
| | - Min Yu
- School of Fishery, Zhejiang Ocean University, Zhoushan 316021, China
| | - Wei Zhan
- Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Feng Liu
- Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Bao Lou
- Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
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Paschoalini AL, Savassi LA, Weber AA, Moreira DP, Ribeiro YM, Rizzo E, Bazzoli N. Evaluation of the oestrogenic potential of oestrone and bisphenol-A on the reproduction of Astyanax bimaculatus males after subacute exposure. FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:797-810. [PMID: 33665751 DOI: 10.1007/s10695-021-00938-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
In the last decades, oestrogenic compounds have often been reported in environmentally relevant concentrations in aquatic environments around the world. Most laboratory studies of oestrogens try to understand the effects of a single contaminant, but in natural environments, the effects may be quite different due to interactions with other compounds. The present study aimed to compare the action of oestrone (E1) and bisphenol-A (BPA), acting singularly and in combination, on the spermatogenesis of Astyanax bimaculatus. After exposure to 100 ng/L of E1, BPA and a mixture of the two for 15 days, our results showed that E1 and the E1 + BPA mixture significantly altered the number of spermatogenic cells. BPA presented high cytotoxicity when compared to other treatments. Analysis of the two oestrogenic compounds suggests that the E1 + BPA mixture has no additive or synergistic effects. Together, the results of the present study indicate that endocrine-disrupting chemicals (EDCs) analysed alone may behave differently than when administered with other substances.
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Affiliation(s)
- Alessandro Loureiro Paschoalini
- Departamento de Morfologia do Instituto de Ciências Biológicas, Universdidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
- Programa de Pós-Graduação de Biologia de Vertebrados, Pontificia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, 30535-610, Brazil
| | - Lourenço Almeida Savassi
- Departamento de Morfologia do Instituto de Ciências Biológicas, Universdidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - André Alberto Weber
- Departamento de Morfologia do Instituto de Ciências Biológicas, Universdidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
- Department of Pharmacology, Robert Tukey Lab, University of California, San Diego, CA, USA
| | - Davidson Peruci Moreira
- Departamento de Morfologia do Instituto de Ciências Biológicas, Universdidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Yves Moreira Ribeiro
- Departamento de Morfologia do Instituto de Ciências Biológicas, Universdidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Elizete Rizzo
- Departamento de Morfologia do Instituto de Ciências Biológicas, Universdidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Nilo Bazzoli
- Programa de Pós-Graduação de Biologia de Vertebrados, Pontificia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, 30535-610, Brazil.
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Grott SC, Bitschinski D, Israel NG, Abel G, da Silva SP, Alves TC, Lima D, Bainy ACD, Mattos JJ, da Silva EB, de Albuquerque CAC, de Almeida EA. Influence of temperature on biomarker responses and histology of the liver of American bullfrog tadpoles (Lithobates catesbeianus, Shaw, 1802) exposed to the herbicide Tebuthiuron. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 771:144971. [PMID: 33545471 DOI: 10.1016/j.scitotenv.2021.144971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/17/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
Tebuthiuron (TBU) is a phenylurea herbicide that is extensively used in sugarcane fields. Owing to the low degradation rate, high water solubility, and leaching potential, TBU is believed to have harmful effects on aquatic organisms, such as anuran tadpoles. Contaminant effects can be influenced by temperature since increases in temperature are often associated with increased metabolic reactions. In this study, we evaluated the influence of temperature on the negative effects of TBU in bullfrog tadpoles (Lithobates catesbeianus) through a multi-biomarker approach. Tadpoles were exposed to 0 (control) 10, 50, and 200 ng L-1 of TBU for 16 days at 25 and 32 °C. TBU increased the transcript levels of genes involved in biotransformation (glutathione S-transferase, GST, and sulfotransferase, SULT) and antioxidant (superoxide dismutase, SOD, and catalase, CAT) enzymes. TBU exposure also increased CAT and glutathione peroxidase (GPx) activities, whereas SOD and carboxylesterase activities were decreased. The highest temperature caused a decrease in the activities of ethoxyresorufin-O-deethylase and SOD but increased the activities of GST, GPx, glucose 6-phosphate dehydrogenase, and acetylcholinesterase. No effects of temperature or TBU exposure were observed in genotoxic markers (frequencies of micronucleous and nuclear abnormalities) or in lipid peroxidation levels. Tadpoles exposed to TBU at all tested concentrations presented a higher index of biomarker responses than that of the control groups. Higher values of severity scores from histological analyses were found in the liver of tadpoles exposed to 50 and 200 ng L-1 of TBU at 32 °C compared with those of the control group at the same temperature. These results indicate that TBU and temperature increases are able to disturb the metabolic homeostasis of L. catesbeianus tadpoles after 16 days of exposure, causing substantial alterations in biomarker responses and liver morphology.
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Affiliation(s)
- Suelen Cristina Grott
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | - Daiane Bitschinski
- Department of Natural Science, University of Blumenau, Blumenau, SC, Brazil
| | | | - Gustavo Abel
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil; Department of Natural Science, University of Blumenau, Blumenau, SC, Brazil
| | | | - Thiago Caique Alves
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | - Daína Lima
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Department of Biochemistry, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil
| | - Afonso Celso Dias Bainy
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Department of Biochemistry, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil
| | - Jacó Joaquim Mattos
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Department of Biochemistry, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil
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Marins AT, Severo ES, Cerezer C, Leitemperger JW, Müller TE, Floriano L, Prestes OD, Zanella R, Loro VL. Environmentally relevant pesticides induce biochemical changes in Nile tilapia (Oreochromis niloticus). ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:585-598. [PMID: 33770304 DOI: 10.1007/s10646-021-02368-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
The high demand for food consequently increases the entry of agricultural residues into water resources, and this phenomenon can affect non-target organisms in different ways. Environmentally relevant pesticide effects (per se or in combinations) are scarce in the scientific literature. Therefore, the aim of this study was to investigate: (1) the presence of pesticide residues in an important Brazilian source of water supply and power generation (Jacuí river), during 1 year of monitoring. (2) in a laboratory study verify the effects of the most frequently, herbicide, fungicide, and insecticide found in Jacuí river (individualized or in a mixture) on biochemical parameters in different tissues of Oreochromis niloticus. Twenty pesticide residues were detected in superficial water samples, and two of them are banned in Brazilian territory. Atrazine (0.56 µg L-1), azoxystrobin (0.024 µg L-1), and imidacloprid (0.11 µg L-1) were the most frequently herbicide, fungicide, and insecticide, respectively, found in the river and were used in the laboratory assay. O. niloticus exposed to the pesticide mixture exhibited more biochemical effects than individualized exposure groups. This response can be a result of the combined pesticide effects, culminating in an additive or synergistic effect, depending on the biomarker. In individual exposure groups, atrazine presented the most pronounced alterations, followed by azoxystrobin and imidacloprid. Overall, pesticide exposure increased levels of oxidative stress parameters, reduced antioxidant enzyme activities, and induced acetylcholinesterase activity. These findings highlight the threat to aquatic organisms which may be exposed to a miscellaneous of toxic compounds in the environment.
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Affiliation(s)
- Aline Teixeira Marins
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
- Laboratório de Toxicologia Aquática, Labtaq, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Eduardo Stringini Severo
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
- Laboratório de Toxicologia Aquática, Labtaq, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Cristina Cerezer
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
- Laboratório de Toxicologia Aquática, Labtaq, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Jossiele Wesz Leitemperger
- Laboratório de Toxicologia Aquática, Labtaq, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Talise Ellwanger Müller
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Luana Floriano
- Laboratório de Análises de Resíduos de Pesticidas (LARP), Centro de Ciências Naturais e Exatas (CCNE), Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Osmar Damian Prestes
- Laboratório de Análises de Resíduos de Pesticidas (LARP), Centro de Ciências Naturais e Exatas (CCNE), Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Renato Zanella
- Laboratório de Análises de Resíduos de Pesticidas (LARP), Centro de Ciências Naturais e Exatas (CCNE), Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil
| | - Vania Lucia Loro
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil.
- Laboratório de Toxicologia Aquática, Labtaq, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil.
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil.
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11
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de Souza Antônio R, Guerra ACS, de Andrade MB, Nishi L, Baptista ATA, Bergamasco R, Vieira AMS. Application of graphene nanosheet oxide for atrazine adsorption in aqueous solution: synthesis, material characterization, and comprehension of the adsorption mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:5731-5741. [PMID: 32970264 DOI: 10.1007/s11356-020-10693-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/31/2020] [Indexed: 05/23/2023]
Abstract
The present study aimed to investigate the application of graphene oxide (GO) as adsorbent material for the removal of atrazine (ATZ). The material produced was characterized to investigate the characteristics and applied as an adsorbent. The material obtained after the synthesis process presented oxygenated functional groups, which contributed to the development of a good adsorbent material. Studies were carried out to verify the influence of adsorbent material mass and initial pH of ATZ solution in adsorption capacity. Kinetic study determined that pseudo-second-order model best describes adsorbate-adsorbent interaction, with equilibrium time of 72 h. The effect of temperature on the material adsorption capacity was also studied. The Langmuir isotherm is the best fit to describe adsorption process GO-ATZ and maximum adsorption capacity obtained was 23.844 ± 0.694 mg g-1, at 318 K. Variations in process energies were determined, being a spontaneous adsorption, endothermic and characteristic of physical and chemical adsorption. Finally, influence of salts in solution on adsorption capacity was studied; the conclusion was that the presence of electrolytes affects the adsorption capacity of the material.
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Affiliation(s)
- Rodrigo de Souza Antônio
- Department of Chemical Engineering, State University of Maringá, 5790 - Colombo Avenue, Maringá, Parana, 87020-900, Brazil
| | - Ana Carolina Sestito Guerra
- Department of Chemical Engineering, State University of Maringá, 5790 - Colombo Avenue, Maringá, Parana, 87020-900, Brazil
| | - Murilo Barbosa de Andrade
- Department of Chemical Engineering, State University of Maringá, 5790 - Colombo Avenue, Maringá, Parana, 87020-900, Brazil
| | - Letica Nishi
- Department of Chemical Engineering, State University of Maringá, 5790 - Colombo Avenue, Maringá, Parana, 87020-900, Brazil
| | - Aline Takaoka Alves Baptista
- Federal Technological University of Paraná, 1233, Street Rosalina Maria Ferreira, Campo Mourão, Paraná, Paraná, 87301-899, Brazil
| | - Rosângela Bergamasco
- Department of Chemical Engineering, State University of Maringá, 5790 - Colombo Avenue, Maringá, Parana, 87020-900, Brazil
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Horak I, Horn S, Pieters R. Agrochemicals in freshwater systems and their potential as endocrine disrupting chemicals: A South African context. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115718. [PMID: 33035912 PMCID: PMC7513804 DOI: 10.1016/j.envpol.2020.115718] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 05/28/2023]
Abstract
South Africa is the largest agrochemical user in sub-Saharan Africa, with over 3000 registered pesticide products. Although they reduce crop losses, these chemicals reach non-target aquatic environments via leaching, spray drift or run-off. In this review, attention is paid to legacy and current-use pesticides reported in literature for the freshwater environment of South Africa and to the extent these are linked to endocrine disruption. Although banned, residues of many legacy organochlorine pesticides (endosulfan and dichlorodiphenyltrichloroethane (DDT)) are still detected in South African watercourses and wildlife. Several current-use pesticides (triazine herbicides, glyphosate-based herbicides, 2,4-dichlorophenoxyacetic acid (2,4-D) and chlorpyrifos) have also been reported. Agrochemicals can interfere with normal hormone function of non-target organism leading to various endocrine disrupting (ED) effects: intersex, reduced spermatogenesis, asymmetric urogenital papillae, testicular lesions and infertile eggs. Although studies investigating the occurrence of agrochemicals and/or ED effects in freshwater aquatic environments in South Africa have increased, few studies determined both the levels of agricultural pesticides present and associated ED effects. The majority of studies conducted are either laboratory-based employing in vitro or in vivo bioassays to determine ED effects of agrochemicals or studies that investigate environmental concentrations of pesticides. However, a combined approach of bioassays and chemical screening will provide a more comprehensive overview of agrochemical pollution of water systems in South Africa and the risks associated with long-term chronic exposure.
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Affiliation(s)
- Ilzé Horak
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa.
| | - Suranie Horn
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | - Rialet Pieters
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
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13
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Yang Y, Pan L, Zhou Y, Xu R, Li D. Benzo[a]pyrene exposure disrupts steroidogenesis and impairs spermatogenesis in diverse reproductive stages of male scallop (Chlamys farreri). ENVIRONMENTAL RESEARCH 2020; 191:110125. [PMID: 32861722 DOI: 10.1016/j.envres.2020.110125] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/08/2020] [Accepted: 08/13/2020] [Indexed: 06/11/2023]
Abstract
Benzo[a]pyrene (BaP), a model compound of polycyclic aromatic hydrocarbon known to impair reproductive functions of vertebrates, while the data is scarce in marine invertebrates. To investigate the toxic effects of BaP on invertebrates reproduction, we exposed male scallop (Chlamys farreri) to BaP (0, 0.38 and 3.8 μg/L) throughout three stages of reproductive cycle (early gametogenesis stage, late gametogenesis stage and ripe stage). The results demonstrated that BaP decreased the gonadosomatic index and mature sperms counts in a dose-dependent manner. Significant changes in sex hormones contents and increased 17β-estradiol/testosterone ratio suggested that BaP produced the estrogenic endocrine effects in male scallops. In support of this view, we confirmed that BaP significantly altered transcripts of genes along the upstream PKA and PKC mediated signaling pathway like fshr, lhcgr, adcy, PKA, PKC, PLC and NR5A2. Subsequently, the expressions of genes encoding downstream steroidogenic enzymes (e.g., 3β-HSD, CYP17 and 17β-HSD) were impacted, which corresponded well with hormonal alterations. In addition, BaP suppressed transcriptions of spermatogenesis-related genes, including ccnd2, SCP3, NRF1 and AQP9. Due to different functional demands, these transcript profiles involved in spermatogenesis exhibited a stage-specific expression pattern. Furthermore, histopathological analysis determined that BaP significantly inhibited testicular development and maturation in male scallops. Overall, the present findings indicated that, playing as an estrogenic-like chemical, BaP could disrupt the steroidogenesis pathway, impair spermatogenesis and caused histological damages, thereby inducing reproductive toxicities with dose- and stage-specific effects in male scallops. And the adverse outcomes might threaten the stability of bivalve populations and destroy the function of marine ecosystems in the long term.
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Affiliation(s)
- Yingying Yang
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, PR China
| | - Luqing Pan
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, PR China.
| | - Yueyao Zhou
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, PR China
| | - Ruiyi Xu
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, PR China
| | - Dongyu Li
- The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, PR China
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15
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Tian Z, Peter KT, Gipe AD, Zhao H, Hou F, Wark DA, Khangaonkar T, Kolodziej EP, James CA. Suspect and Nontarget Screening for Contaminants of Emerging Concern in an Urban Estuary. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:889-901. [PMID: 31887037 DOI: 10.1021/acs.est.9b06126] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This study used suspect and nontarget screening with high-resolution mass spectrometry to characterize the occurrence of contaminants of emerging concern (CECs) in the nearshore marine environment of Puget Sound (WA). In total, 87 non-polymeric CECs were identified; those confirmed with reference standards (45) included pharmaceuticals, herbicides, vehicle-related compounds, plasticizers, and flame retardants. Eight polyfluoroalkyl substances were detected; perfluorooctanesulfonic acid (PFOS) concentrations were as high as 72-140 ng/L at one location. Low levels of methamphetamine were detected in 41% of the samples. Transformation products of pesticides were tentatively identified, including two novel transformation products of tebuthiuron. While a hydrodynamic simulation, analytical results, and dilution calculations demonstrated the prevalence of wastewater effluent to nearshore marine environments, the identity and abundance of selected CECs revealed the additional contributions from stormwater and localized urban and industrial sources. For the confirmed CECs, risk quotients were calculated based on concentrations and predicted toxicities, and eight CECs had risk quotients >1. Dilution in the marine estuarine environment lowered the risks of most wastewater-derived CECs, but dilution alone is insufficient to mitigate risks of localized inputs. These findings highlighted the necessity of suspect and nontarget screening and revealed the importance of localized contamination sources in urban marine environments.
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Affiliation(s)
- Zhenyu Tian
- Center for Urban Waters , 326 East D Street , Tacoma , Washington 98421 , United States
- Interdisciplinary Arts and Sciences , University of Washington Tacoma , Tacoma , Washington 98421 , United States
| | - Katherine T Peter
- Center for Urban Waters , 326 East D Street , Tacoma , Washington 98421 , United States
- Interdisciplinary Arts and Sciences , University of Washington Tacoma , Tacoma , Washington 98421 , United States
| | - Alex D Gipe
- Center for Urban Waters , 326 East D Street , Tacoma , Washington 98421 , United States
- Interdisciplinary Arts and Sciences , University of Washington Tacoma , Tacoma , Washington 98421 , United States
| | - Haoqi Zhao
- Department of Civil and Environmental Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - Fan Hou
- Department of Civil and Environmental Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - David A Wark
- Center for Urban Waters , 326 East D Street , Tacoma , Washington 98421 , United States
- Interdisciplinary Arts and Sciences , University of Washington Tacoma , Tacoma , Washington 98421 , United States
| | - Tarang Khangaonkar
- Pacific Northwest National Laboratories , 1100 Dexter Avenue N , Seattle , Washington 98011 , United States
| | - Edward P Kolodziej
- Center for Urban Waters , 326 East D Street , Tacoma , Washington 98421 , United States
- Interdisciplinary Arts and Sciences , University of Washington Tacoma , Tacoma , Washington 98421 , United States
- Department of Civil and Environmental Engineering , University of Washington , Seattle , Washington 98195 , United States
| | - C Andrew James
- Center for Urban Waters , 326 East D Street , Tacoma , Washington 98421 , United States
- Interdisciplinary Arts and Sciences , University of Washington Tacoma , Tacoma , Washington 98421 , United States
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16
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Ma M, Chen C, Yang G, Wang Y, Wang T, Li Y, Qian Y. Combined anti-androgenic effects of mixtures of agricultural pesticides using in vitro and in silico methods. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 186:109652. [PMID: 31605955 DOI: 10.1016/j.ecoenv.2019.109652] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/02/2019] [Accepted: 09/05/2019] [Indexed: 06/10/2023]
Abstract
Humans and wildlife are continuously and simultaneously exposed to various pesticides that have been identified as endocrine disruptors which interfere with regulations of sexual differentiation and fertility. Low-dose effects of combined exposure from mixtures of pesticides have been extensively reported and need to be addressed in the context of human health risk assessment. The objective of the study is to assess the individual and combined anti-androgenic effects of twelve widely used pesticides in MDA-kb2 cells. The order of potency for seven pesticides with moderate anti-androgenic activities was in the order: fenitrothion > dimethomorph > difenoconazole > bromopropylate > prochloraz > imazalil > endosulfan, which was induced by the androgen receptor (AR) antagonism rather than cytotoxicity (with the exception of endosulfan which exhibited the highest cytotoxicity). The other five pesticides exhibited lower anti-androgenic activities. At 10% of AR antagonistic effect, three mixtures comprised of the seven pesticides (Mix-EC10, Mix-EC20, and Mix-EC25) at equi-effect concentrations showed summed concentrations of 6.75E-11, 17.63 and 25.21 μM, respectively. The combined effects were essentially close to the predicted of concentration addition (CA) at realistically low concentrations. In addition, molecular docking simulation indicated that hydrophobic interaction and polar functional groups of the pesticides contributed to the binding energy, which might be responsible for the AR antagonism. Our findings provide a basis for defining similarly acting antagonists in the context of cumulative risk assessment for pesticides in foods.
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Affiliation(s)
- Mengmeng Ma
- Key Laboratory of Agro-Product Quality and Safety of Ministry of Agriculture, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, NO.12 Zhong-guan-cun South Street, Haidian District, Beijing, 100081, China.
| | - Chen Chen
- Key Laboratory of Agro-Product Quality and Safety of Ministry of Agriculture, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, NO.12 Zhong-guan-cun South Street, Haidian District, Beijing, 100081, China.
| | - Guiling Yang
- Lab (Hangzhou) for Risk Assessment of Agricultural Products of Ministry of Agriculture, Institute of Quality and Standard for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Yanhua Wang
- Lab (Hangzhou) for Risk Assessment of Agricultural Products of Ministry of Agriculture, Institute of Quality and Standard for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Tiancai Wang
- Key Laboratory of Agro-Product Quality and Safety of Ministry of Agriculture, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, NO.12 Zhong-guan-cun South Street, Haidian District, Beijing, 100081, China
| | - Yun Li
- Key Laboratory of Agro-Product Quality and Safety of Ministry of Agriculture, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, NO.12 Zhong-guan-cun South Street, Haidian District, Beijing, 100081, China
| | - Yongzhong Qian
- Key Laboratory of Agro-Product Quality and Safety of Ministry of Agriculture, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, NO.12 Zhong-guan-cun South Street, Haidian District, Beijing, 100081, China.
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Weber AA, Moreira DP, Melo RMC, Ribeiro YM, Bazzoli N, Rizzo E. Environmental exposure to oestrogenic endocrine disruptors mixtures reflecting on gonadal sex steroids and gametogenesis of the neotropical fishAstyanax rivularis. Gen Comp Endocrinol 2019; 279:99-108. [PMID: 30605662 DOI: 10.1016/j.ygcen.2018.12.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/27/2018] [Accepted: 12/30/2018] [Indexed: 12/16/2022]
Abstract
Discharge of municipal wastewater promotes the entry of diverse oestrogenic compounds into the water bodies. This complex mixture of substances interferes in the steroidogenic pathway, being able to promote severe reproductive impairment in freshwater fish populations. The purpose of the present study was to evaluate the effects of oestrogenic endocrine disruptors (EDCs) mixture on gonadal sex steroids (testosterone, T; 11-ketotestosterone, 11-KT; 17β-oestradiol, E2; 17-hydroxyprogesterone, 17-OHP) in the peak of the reproductive season of Astyanax rivularis, correlating the results obtained with the proportion of germ cells and gonadal histopathology. Three sampling sites were chosen to conduct the study, one reference site (S1), without contamination by municipal wastewater and two sites (S2 and S3) receiving discharge of municipal wastewater. Males of A. rivularis presented higher concentrations of E2, lower androgens (T and 11-KT) in gonads when compared to males from site S1. Concentrations of 17-OHP did not present significant difference among sites. In sites S2 and S3, the proportion of early spermatocytes, spermatids and Leydig cells increased while spermatozoa decreased compared to fish from S1. The following gonadal histopathologies were detected in the male fishes: intersex gonads (28% in S3) and testicular degeneration with germinal epithelium exhibiting agglutinated germ cells masses and empty cysts (57% in S2 and 71% in S3). In females, concentrations of T, E2 and 17-OHP did not present significant difference among the sites, however higher 11-KT concentrations were detected in females from sites S2 and S3. A lower proportion of perinucleolar follicles and a higher incidence of vitellogenic follicles, besides, aged oocytes and the presence of eosinophilic proteinaceous fluid in the interstitial compartment were also found in females from impacted sites. These results indicate that the urbanization and consequent release of municipal wastewater containing oestrogenic compounds in the headwater creeks are altering the levels of sex hormones and gametogenesis of A. rivularis. Further studies should be performed to determine whether oestrogenic endocrine disrupters are disrupting the reproduction of A. rivularis.
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Affiliation(s)
- André Alberto Weber
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P.486, 30161-970 Minas Gerais, Brazil
| | - Davidson Peruci Moreira
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P.486, 30161-970 Minas Gerais, Brazil
| | - Rafael Magno Costa Melo
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P.486, 30161-970 Minas Gerais, Brazil
| | - Yves Moreira Ribeiro
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P.486, 30161-970 Minas Gerais, Brazil
| | - Nilo Bazzoli
- Programa de Pós-graduação em Zoologia de Vertebrados, Pontifícia Universidade Católica de Minas Gerais, PUC Minas, Belo Horizonte, 30535-610 Minas Gerais, Brazil
| | - Elizete Rizzo
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG, Belo Horizonte, C.P.486, 30161-970 Minas Gerais, Brazil.
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Li X, Wang J, Yu M, Zhang X, Wang W, Tian H, Ru S. 2,2'-Dithiobis-pyridine induced reproductive toxicity in male guppy (Poecilia reticulata). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 169:778-785. [PMID: 30597776 DOI: 10.1016/j.ecoenv.2018.11.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 10/10/2018] [Accepted: 11/19/2018] [Indexed: 06/09/2023]
Abstract
Metal pyrithiones (MePTs) are frequently used antifouling biocides in marine coatings. Their main degradation product, 2,2'-dithiobis-pyridine ((PS)2), has been widely detected in seawater and may pose potential ecological risks. In the present study, sexually mature guppies (Poecilia reticulata) were exposed to (PS)2 at concentrations of 0, 20, 200, and 2000 ng/L for 28 days to investigate its reproductive toxicity. The results showed that (PS)2 significantly reduced testosterone (T) levels, spermatogenic cyst number and sperm motility, impeded spermatogenic cell differentiation in male guppies and delayed embryo development in females. These results indicated that (PS)2 could cause reproductive toxicity in guppies. We also examined mRNA expression of indices involved in the hypothalamic-pituitary-gonadal axis and reproductive behaviors. We found that 200 and 2000 ng/L (PS)2 decreased T synthesis by downregulating 17βHSD and CYP17 mRNA levels, and upregulating the mRNA level of CYP19a1a, which converted T to 17β-estradiol. (PS)2 also upregulated GnRH1, FSHβ, LHβ, and LHR mRNA levels, a positive feedback regulation due to the decrease of T levels in male guppies. Furthermore, (PS)2 significantly decreased CYP19a1b mRNA levels in all three exposure groups and thus reduced the display frequency of male guppies. This study was the first to report that (PS)2 could induce reproductive toxicity, which would provide a basis for future assessment of its ecological risk.
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Affiliation(s)
- Xuefu Li
- Colleges of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China
| | - Jun Wang
- Colleges of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China
| | - Miao Yu
- Colleges of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China
| | - Xiaona Zhang
- Colleges of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China
| | - Wei Wang
- Colleges of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China
| | - Hua Tian
- Colleges of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China.
| | - Shaoguo Ru
- Colleges of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China.
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Wang YQ, Li YW, Chen QL, Liu ZH. Long-term exposure of xenoestrogens with environmental relevant concentrations disrupted spermatogenesis of zebrafish through altering sex hormone balance, stimulating germ cell proliferation, meiosis and enhancing apoptosis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:486-494. [PMID: 30366296 DOI: 10.1016/j.envpol.2018.10.079] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/16/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
Environmental estrogens are capable of interfering with the spermatogenesis and fertility of fish. However in natural waters, these chemicals are more likely to occur as a combination rather than a single stressor. Whether and how the mixture of xenoestrogens with environmental relevant concentrations may affect fish spermatogenesis remains largely unknown. In this study, male zebrafish adults were administered to 17alpha-ethinylestradiol (EE2) and a mixture of xenoestrogens (Mix (E2, EE2, DES, 4-t-OP, 4-NP and BPA)), with the estrogenic potency equivalent to EE2. After a 60-day exposures, elevated mRNA levels of vitellogenin 1 (vtg1) and estrogen receptor 1 (esr1) in the liver of fish in both treated groups were observed. Moreover, the plasma level of E2 declined significantly in the Mix group and the ratio of 11-KT/E2 was significantly elevated in both treated groups. Consistently, the mRNA level of P450 side-chain cleavage (scc) in the EE2 group and ovarian type aromatase (cyp19a1a) in the Mix group was significantly suppressed. In addition, decreased gonadosomatic index and sperm count in the fish of Mix group were present. Furthermore, increased number of the proliferating germ cells (such as spermatogonia and spermatocytes) was observed in the fish of both groups, suggesting a stimulated germ cell proliferation and meiosis. Accordingly, both exposures significantly up-regulated the mRNA levels of genes in mitosis (cyclinb1) and meiosis (cyp26a1 in EE2 group, aldh1a2, cyp26a1, sycp3 and spo11 in Mix). In addition, decreased number of spermatozoa and increased number of TUNEL-positive signals were present in the testis of fish in the Mix group, indicating an enhanced apoptosis. Further analyses demonstrated the significant elevated expressions of tnfrsf1a and the ratio of tnfrsf1a/tnfrsf1b in the Mix group, suggesting an elevated apoptosis in the testis of fish in the Mix group via extrinsic pathway. The present study greatly extends our understanding of the underlying mechanisms of the reproductive toxicity of xenoestrogens on fish.
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Affiliation(s)
- Ya-Qin Wang
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Ying-Wen Li
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Qi-Liang Chen
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Zhi-Hao Liu
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China.
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