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Vidal DF, Pires BC, Borges MMC, de Oliveira HL, Silva CF, Borges KB. Magnetic solid-phase extraction based on restricted-access molecularly imprinted polymers for ultrarapid determination of ractopamine residues from food samples by capillary electrophoresis. J Chromatogr A 2024; 1720:464809. [PMID: 38490141 DOI: 10.1016/j.chroma.2024.464809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/17/2024]
Abstract
An ultrafast, efficient, and eco-friendly method combining magnetic solid phase extraction and capillary electrophoresis with diode array detection have been developed to determine ractopamine residues in food samples. A restricted access material based on magnetic and mesoporous molecularly imprinted polymer has been properly synthesized and characterized, demonstrating excellent selectivity and high adsorbent capacity. Short-end injection capillary electrophoresis method was optimized: 75 mM triethylamine pH 7 as BGE, -20 kV, 50 mbar by hydrodynamic injection during 8 s, and capillary temperature at 25 °C; reaching ultrafast ractopamine analysis (∼0.6 min) with good peak asymmetry, and free from interfering and/or baseline noise. After sample preparation optimization, the conditions were: 1000 µL of sample at pH 6, 20 mg of adsorbent, stirring time of 120 s, 250 µL of ultrapure water as washing solvent, 1000 µL of methanol: acetic acid (7: 3, v/v) as eluent, and the adsorbent can be reused four times. In these conditions, the analytical method showed recoveries around to 100 %, linearity ranged from 9.74 to 974.0 µg kg-1, correlation coefficient (r) ≥ 0,99 in addition to adequate precision, accuracy, and robustness. After proper validation, the method was successfully applied in the analysis ractopamine residues in bovine milk and bovine and porcine muscle.
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Affiliation(s)
- Daniel Ferreira Vidal
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais 36301-160, Brazil
| | - Bruna Carneiro Pires
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais 36301-160, Brazil
| | - Marcella Matos Cordeiro Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais 36301-160, Brazil
| | - Hanna Leijoto de Oliveira
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais 36301-160, Brazil
| | - Camilla Fonseca Silva
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais 36301-160, Brazil
| | - Keyller Bastos Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais 36301-160, Brazil.
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2
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Shelver WL, McGarvey AM, Holthusen JE, Young JM, Byrd CJ, Smith DJ. Comparison of immunoassay and LC-tandem mass spectrometry analyses of ractopamine in hog oral fluid. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2024; 41:162-174. [PMID: 38190266 DOI: 10.1080/19440049.2023.2300738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 12/26/2023] [Indexed: 01/10/2024]
Abstract
The accurate detection of ractopamine in food animals is crucial for marketing since some entities require animals or animal carcasses to be free of ractopamine residues. Field-based ractopamine screening tests that are rapid, sensitive, and capable of high-throughput are highly desirable to ensure that inadvertent exposure to ractopamine did not occur in animals marketed as animals that have not been fed ractopamine. An immunochemically based lateral flow assay was used to analyze oral fluids from hogs never exposed to ractopamine and from hogs that were presumed positives and results were confirmed using an enhanced sensitivity LC-MSMS method. We found that an immunochemically based lateral flow system having a working range of 2.5 to 15 ng mL-1 worked well as a screening assay with 1.7% false positive results in freshly collected hog oral fluids. Using ractopamine glucuronide standards and LC-MSMS, we determined that the false positive results were not due to the presence of ractopamine glucuronide metabolites in oral fluids.
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Affiliation(s)
- Weilin L Shelver
- Edward T. Schafer Agricultural Research Center, United States Department of Agriculture, Agricultural Research Service, Fargo, North Dakota, USA
| | - Amy M McGarvey
- Edward T. Schafer Agricultural Research Center, United States Department of Agriculture, Agricultural Research Service, Fargo, North Dakota, USA
| | - Jason E Holthusen
- Edward T. Schafer Agricultural Research Center, United States Department of Agriculture, Agricultural Research Service, Fargo, North Dakota, USA
| | - Jennifer M Young
- Department of Animal Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Christopher J Byrd
- Department of Animal Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - David J Smith
- Edward T. Schafer Agricultural Research Center, United States Department of Agriculture, Agricultural Research Service, Fargo, North Dakota, USA
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3
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Zhang K, Zhang X, Rong Y, Niu Q, Jin P, Ma X, Yang C, Liang W. Supramolecular recognition enhanced electrochemical sensing: β-cyclodextrin and Pd nanoparticle co-decorated 3D reduced graphene oxide nanocomposite-modified glassy carbon electrode for the quantification of ractopamine. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023. [PMID: 37475678 DOI: 10.1039/d3ay00872j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Ractopamine (RAC) is universally known for improving lean meat percentage in livestock and thus is widely introduced as a feed additive. However, it is difficult to eliminate the RAC residue in animal tissues from the biological system and will inevitably harm human health. Hence, detecting RAC molecules in biological samples is extremely significant. Herein, a novel strategy of supramolecular recognition-enhanced electrochemical sensing is presented. This platform was constructed by coupling β-cyclodextrin (β-CD) with palladium nanoparticles (Pd NPs)-functionalized three-dimensional reduced graphene oxide (3D-rGO) to form a nanocomposite (3D-rGO/Pd/β-CD), which was further used to modify a glassy carbon electrode (GCE) for RAC detection. Benefiting from the attractive electrical conductivity and catalytic activity of 3D-rGO/Pd, as well as the unique small-molecule-recognition ability of β-CD demonstrated by 1H NMR spectrum, which revealed the 1 : 2 binding mode of RAC with β-CD, increased peak current signals of RAC were observed in the cyclic voltammetry (CV) test. Under optimized conditions, the wide linear concentration range spanned 1-95 μM, along with a relatively low detection limit of 0.12 μM (S/N = 3), as evidenced by the differential pulse voltammetry (DPV) approach. The platform also exhibited satisfactory stability and fine reproducibility, as well as high selectivity and good anti-interference capability. Moreover, this as-obtained sensor was efficiently applied in pork samples with a high recovery rate (96.44-103.99%), which provides a promising view of its electrochemical biosensing ability in practical applications.
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Affiliation(s)
- Kai Zhang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
| | - Xiaoyuan Zhang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
| | - Yanqin Rong
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
| | - Qingfang Niu
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
| | - Pengyue Jin
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Sichuan University, Chengdu 610064, China
| | - Xuewen Ma
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Sichuan University, Chengdu 610064, China
| | - Wenting Liang
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
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4
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Vidal DF, Silva CF, Borges MMC, Nascimento CS, Borges KB. Magnetic and mesoporous molecularly imprinted polymer synthesized by rational computation design: Sample preparation and analysis of ractopamine. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1227:123843. [PMID: 37535992 DOI: 10.1016/j.jchromb.2023.123843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/19/2023] [Accepted: 07/24/2023] [Indexed: 08/05/2023]
Abstract
Through density functional theory calculations was studied theoretically the formation process of a magnetic and mesoporous molecularly imprinted polymer for ractopamine (RAC), evaluating the molecular electrostatic potential map, functional monomers, functional monomer / template stoichiometry and crosslink agents. The results revealed that the best conditions for the synthesis were established with acrylic acid as functional monomer in a 1: 4 stoichiometry using acetonitrile as the solvent and ethylene glycol dimethacrylate as crosslink agent. It was observed that nine hydrogen bonds established between the RAC and acrylic acid play a key role on the pre-polymerization complex. In addition, three analytical methods using HPLC, UHPLC and CE instruments were optimized for rapid analysis. The adsorbent was experimentally synthesized considering the best conditions found at the molecular level and characterized by FTIR, DRX, TGA, SEM, TEM, surface analysis, and wettability. After that, the synthesized material was used in magnetic solid phase extraction combined with capillary electrophoresis in a preliminary RAC recovery study from milk samples. Finally, greenness metric with a score of 0.55 have been obtained for the sample preparation procedure using the online AGREEprep metric.
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Affiliation(s)
- Daniel Ferreira Vidal
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160, São João del-Rei, Minas Gerais, Brazil
| | - Camilla Fonseca Silva
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160, São João del-Rei, Minas Gerais, Brazil
| | - Marcella Matos Cordeiro Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160, São João del-Rei, Minas Gerais, Brazil
| | - Clebio Soares Nascimento
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160, São João del-Rei, Minas Gerais, Brazil
| | - Keyller Bastos Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160, São João del-Rei, Minas Gerais, Brazil.
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5
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Development of a mutton powder certified reference material for the analysis of ractopamine. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2022.104935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Hader JD, Lane T, Boxall ABA, MacLeod M, Di Guardo A. Enabling forecasts of environmental exposure to chemicals in European agriculture under global change. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 840:156478. [PMID: 35667426 DOI: 10.1016/j.scitotenv.2022.156478] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/16/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
European agricultural development in the 21st century will be affected by a host of global changes, including climate change, changes in agricultural technologies and practices, and a shift towards a circular economy. The type and quantity of chemicals used, emitted, and cycled through agricultural systems in Europe will change, driven by shifts in the use patterns of pesticides, veterinary pharmaceuticals, reclaimed wastewater used for irrigation, and biosolids. Climate change will also impact the chemical persistence, fate, and transport processes that dictate environmental exposure. Here, we review the literature to identify research that will enable scenario-based forecasting of environmental exposures to organic chemicals in European agriculture under global change. Enabling exposure forecasts requires understanding current and possible future 1.) emissions, 2.) persistence and transformation, and 3.) fate and transport of agricultural chemicals. We discuss current knowledge in these three areas, the impact global change drivers may have on them, and we identify knowledge and data gaps that must be overcome to enable predictive scenario-based forecasts of environmental exposure under global change. Key research gaps identified are: improved understanding of relationships between global change and chemical emissions in agricultural settings; better understanding of environment-microbe interactions in the context of chemical degradation under future conditions; and better methods for downscaling climate change-driven intense precipitation events for chemical fate and transport modelling. We introduce a set of narrative Agricultural Chemical Exposure (ACE) scenarios - augmenting the IPCC's Shared Socio-economic Pathways (SSPs) - as a framework for forecasting chemical exposure in European agriculture. The proposed ACE scenarios cover a plausible range of optimistic to pessimistic 21st century development pathways. Filling the knowledge and data gaps identified within this study and using the ACE scenario approach for chemical exposure forecasting will support stakeholder planning and regulatory intervention strategies to ensure European agricultural practices develop in a sustainable manner.
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Affiliation(s)
- John D Hader
- Department of Environmental Science, Stockholm University, 10691 Stockholm, Sweden
| | - Taylor Lane
- Department of Environment and Geography, University of York, Heslington, York, North Yorkshire YO10 5NG, United Kingdom
| | - Alistair B A Boxall
- Department of Environment and Geography, University of York, Heslington, York, North Yorkshire YO10 5NG, United Kingdom
| | - Matthew MacLeod
- Department of Environmental Science, Stockholm University, 10691 Stockholm, Sweden.
| | - Antonio Di Guardo
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, 22100 Como, CO, Italy
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Jung YS, Kim DB, Nam TG, Seo D, Yoo M. Identification and quantification of multi-class veterinary drugs and their metabolites in beef using LC–MS/MS. Food Chem 2022; 382:132313. [DOI: 10.1016/j.foodchem.2022.132313] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 01/12/2022] [Accepted: 01/29/2022] [Indexed: 01/14/2023]
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8
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Wu L, Li Y, Kong X, Zhu X. Mechanism evolution and prediction of carbamazepine sorption by mangrove plant residue-derived biochars. JOURNAL OF ENVIRONMENTAL QUALITY 2022; 51:745-754. [PMID: 35460589 DOI: 10.1002/jeq2.20359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
A mechanism for carbamazepine (CBZ) sorption by mangrove plant residue-derived biochars pyrolyzed at 200-700 °C (referred as MPR200-MPR700) was elucidated in this study. The experimental results demonstrated that the dominant sorption mechanism of biochars for CBZ was evolved from partition to adsorption with increasing pyrolysis temperature. The CBZ concentration-dependent contributions of partition and adsorption were controlled by the relative noncarbonized and carbonized fractions of biochars. The partition medium changed from a polymeric aliphatic fraction (mangrove plant residue [MPR]200-MPR400) to a more condensed aromatic phase (MPR500-MPR600), which made the partition less favorable. Meanwhile, the adsorption was selectively regulated by polarity (MPR200-MPR300) and porosity (MPR400-MPR700) for different biochars. A pragmatic model including the sorbent aromaticity index (H/C) was put forward to predict CBZ sorption to MPR200-MPR700 and other carbonaceous materials reported in the literature. The findings can be helpful in understanding CBZ-biochar interactions and developing effective sorbents (such as biochars) for pollutant sequestration.
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Affiliation(s)
- Lin Wu
- Key Laboratorty of Eco-Geochemistry, Ministry of Natural Resources, National Research Center for Geoanalysis (NRCGA), Beijing, 100037, China
- China Geological Survey and Hebei Province Key Laboratory of Groundwater Contamination and Remediation, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China
| | - Yasong Li
- China Geological Survey and Hebei Province Key Laboratory of Groundwater Contamination and Remediation, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China
| | - Xiangke Kong
- China Geological Survey and Hebei Province Key Laboratory of Groundwater Contamination and Remediation, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China
| | - Xiaohua Zhu
- Key Laboratorty of Eco-Geochemistry, Ministry of Natural Resources, National Research Center for Geoanalysis (NRCGA), Beijing, 100037, China
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9
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Gao H, Chen M, Gao H, Gao S, Liu X, Du R, Wang F, Wang Y, Wan L. Determination of ractopamine residue in animal derived foods using electromembrane extraction followed by liquid chromatography tandem mass spectrometry. J Chromatogr A 2022; 1675:463179. [DOI: 10.1016/j.chroma.2022.463179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/23/2022] [Accepted: 05/25/2022] [Indexed: 10/18/2022]
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10
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Ribeiro GO, Terry S, Hünerberg M, Ominski K, Larney FJ, McAllister TA. Effect of trenbolone acetate, melengestrol acetate, and ractopamine hydrochloride on the growth performance of beef cattle. CANADIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1139/cjas-2020-0159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The effect of trenbolone acetate + estradiol (TBA) implants, melengestrol acetate (MGA), and ractopamine hydrochloride + TBA (RAC + TBA) on growth performance and carcass characteristics in beef cattle (n = 680; 279 ± 10.1 kg) fed barley grain/corn silage was examined in a 4 yr study (four pens per treatment per year; 262 ± 8 d feeding period). In the first 2 yr, treatments were (1) control heifers (H-CON; no growth promoters), (2) TBA-implanted heifers (H-TBA), (3) MGA heifers (H-MGA), (4) control steers (S-CON; no growth promoters), and (5) TBA-implanted steers (S-TBA). A sixth treatment (6) RAC + TBA steers (RAC + TBA) was included in years 3 and 4. Overall dry matter intake (DMI) of heifers was increased (P < 0.001) by TBA but not MGA. Compared with H-CONs, H-TBA had greater average daily gain (ADG) (P < 0.001), gain to feed ratio (G/F) (P < 0.001), and carcass weight (P < 0.001), whereas S-TBA had increased ADG (P < 0.001), G/F (P< 0.001), and carcass weight (P < 0.001) compared with S-CON. Compared with H-CON, H-MGA had increased (P < 0.01) ADG, G/F, and carcass weight. The RAC + TBA had increased (P < 0.01) ADG and carcass weight (3.2%) but not G/F or DMI compared with S-TBA. This 4 yr study showed a consistent positive impact of growth-enhancing technologies on the performance of Canadian feedlot cattle.
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Affiliation(s)
- Gabriel O. Ribeiro
- Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, SK S7N5A8, Canada
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada
| | - Stephanie Terry
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada
| | - Martin Hünerberg
- Department of Animal Sciences, Ruminant Nutrition, University of Goettingen, Goettingen 37073, Germany
| | - Kim Ominski
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Francis J. Larney
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada
| | - Tim A. McAllister
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada
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11
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Tan H, Bertram MG, Martin JM, Ecker TE, Hannington SL, Saaristo M, O'Bryan MK, Wong BBM. The endocrine disruptor 17β-trenbolone alters the relationship between pre- and post-copulatory sexual traits in male mosquitofish (Gambusia holbrooki). THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 790:148028. [PMID: 34087738 DOI: 10.1016/j.scitotenv.2021.148028] [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: 04/22/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 06/12/2023]
Abstract
It is now well-established that reproduction in wildlife can be disrupted by anthropogenic environmental changes, such as chemical pollution. However, very little is known about how these pollutants might affect the interplay between pre- and post-copulatory mechanisms of sexual selection. Here, we investigated the impacts of 21-day exposure of male eastern mosquitofish (Gambusia holbrooki) to a field-realistic level (average measured concentration: 11 ng/L) of the endocrine-disrupting chemical 17β-trenbolone (17β-TB) on pre- and post-copulatory reproductive traits. We examined male reproductive behaviour by testing the time spent near a female behind a partition, as well as the number of copulation attempts made, and the time spent chasing a female in a free-swimming context. Sperm traits were also assayed for all males. We found that exposure of male fish to 17β-TB altered the relationship between key pre- and post-copulatory reproductive traits. Furthermore, 17β-TB-exposed males had, on average, a higher percentage of motile sperm, and performed fewer copulation attempts than unexposed males. However, there was no overall effect of 17β-TB exposure on either the time males spent associating with or chasing females. Taken together, our findings demonstrate the potential for chemical pollutants to affect both pre- and post-copulatory sexual traits, and the interplay between these mechanisms of sexual selection in contaminated wildlife.
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Affiliation(s)
- Hung Tan
- School of Biological Sciences, Monash University, Victoria, Australia
| | - Michael G Bertram
- School of Biological Sciences, Monash University, Victoria, Australia; Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden.
| | - Jake M Martin
- School of Biological Sciences, Monash University, Victoria, Australia
| | - Tiarne E Ecker
- School of Biological Sciences, Monash University, Victoria, Australia
| | | | - Minna Saaristo
- School of Biological Sciences, Monash University, Victoria, Australia; Department of Biosciences, Åbo Akademi University, Turku, Finland; EPA Victoria, Water Sciences, Victoria, Australia
| | - Moira K O'Bryan
- School of Biological Sciences, Monash University, Victoria, Australia
| | - Bob B M Wong
- School of Biological Sciences, Monash University, Victoria, Australia
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12
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Thomson P, Pineda M, Yargeau V, Langlois VS. Chronic Exposure to Two Gestagens Differentially Alters Morphology and Gene Expression in Silurana tropicalis. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 80:745-759. [PMID: 33856560 DOI: 10.1007/s00244-021-00831-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 03/03/2021] [Indexed: 06/12/2023]
Abstract
Gestagens are active ingredients in human and veterinary drugs with progestogenic activity. Two gestagens-progesterone (P4), and the synthetic P4 analogue, melengestrol acetate (MGA)-are approved for use in beef cattle agriculture in North America. Both P4 and MGA have been measured in surface water receiving runoff from animal agricultural operations. This project aimed to assess the morphometric and molecular consequences of chronic exposures to P4, MGA, and their mixture during Western clawed frog metamorphosis. Chronic exposure (from embryo to metamorphosis) to MGA (1.7 µg/L) or P4 + MGA (0.22 µg/L P4 + 1.5 µg/L MGA) caused a considerable dysregulation of metamorphic timing, as evidenced by an inhibition of growth, narrower head, and lack of forelimb emergence in all animals. Molecular analysis revealed that chronic exposure to the mixture induced an additive upregulation of neurosteroid-related (GABAA receptor subunit α6 (gabra6) and steroid 5-alpha reductase 1 (srd5α1) gene expression in brain tissue. Chronic P4 exposure (0.26 µg/L P4) induced a significant upregulation of the expression hypothalamic-pituitary-gonadal (HPG)-related genes (ipgr, erα) in the gonadal mesonephros complex (GMC). Our data suggest that exposure to P4, MGA, and their mixture induces multiple endocrine responses and adverse effects in larval Western clawed frogs. This study helps to better our understanding of the consequences of chronic gestagen exposure and suggests that the implications and risk of high gestagen use in beef cattle feeding operations may extend to the aquatic environment.
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Affiliation(s)
- Paisley Thomson
- Institut national de la recherche scientifique (INRS) - Centre Eau Terre Environnement, 490 rue de la Couronne, Québec City, QC, G1K 9A9, Canada
| | - Marco Pineda
- Department of Chemical Engineering, McGill University, 3610 University St, Montreal, QC, H3A 0C5, Canada
| | - Viviane Yargeau
- Department of Chemical Engineering, McGill University, 3610 University St, Montreal, QC, H3A 0C5, Canada
| | - Valerie S Langlois
- Institut national de la recherche scientifique (INRS) - Centre Eau Terre Environnement, 490 rue de la Couronne, Québec City, QC, G1K 9A9, Canada.
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