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Krueger Q, Phippen B, Reitzel A. Antibiotics alter development and gene expression in the model cnidarian Nematostella vectensis. PeerJ 2024; 12:e17349. [PMID: 38784394 PMCID: PMC11114123 DOI: 10.7717/peerj.17349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 04/17/2024] [Indexed: 05/25/2024] Open
Abstract
Background Antibiotics are commonly used for controlling microbial growth in diseased organisms. However, antibiotic treatments during early developmental stages can have negative impacts on development and physiology that could offset the positive effects of reducing or eliminating pathogens. Similarly, antibiotics can shift the microbial community due to differential effectiveness on resistant and susceptible bacteria. Though antibiotic application does not typically result in mortality of marine invertebrates, little is known about the developmental and transcriptional effects. These sublethal effects could reduce the fitness of the host organism and lead to negative changes after removal of the antibiotics. Here, we quantify the impact of antibiotic treatment on development, gene expression, and the culturable bacterial community of a model cnidarian, Nematostella vectensis. Methods Ampicillin, streptomycin, rifampicin, and neomycin were compared individually at two concentrations, 50 and 200 µg mL-1, and in combination at 50 µg mL-1 each, to assess their impact on N. vectensis. First, we determined the impact antibiotics have on larval development. Next Amplicon 16S rDNA gene sequencing was used to compare the culturable bacteria that persist after antibiotic treatment to determine how these treatments may differentially select against the native microbiome. Lastly, we determined how acute (3-day) and chronic (8-day) antibiotic treatments impact gene expression of adult anemones. Results Under most exposures, the time of larval settlement extended as the concentration of antibiotics increased and had the longest delay of 3 days in the combination treatment. Culturable bacteria persisted through a majority of exposures where we identified 359 amplicon sequence variants (ASVs). The largest proportion of bacteria belonged to Gammaproteobacteria, and the most common ASVs were identified as Microbacterium and Vibrio. The acute antibiotic exposure resulted in differential expression of genes related to epigenetic mechanisms and neural processes, while constant application resulted in upregulation of chaperones and downregulation of mitochondrial genes when compared to controls. Gene Ontology analyses identified overall depletion of terms related to development and metabolism in both antibiotic treatments. Discussion Antibiotics resulted in a significant increase to settlement time of N. vectensis larvae. Culturable bacterial species after antibiotic treatments were taxonomically diverse. Additionally, the transcriptional effects of antibiotics, and after their removal result in significant differences in gene expression that may impact the physiology of the anemone, which may include removal of bacterial signaling on anemone gene expression. Our research suggests that impacts of antibiotics beyond the reduction of bacteria may be important to consider when they are applied to aquatic invertebrates including reef building corals.
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Affiliation(s)
- Quinton Krueger
- Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, United States of America
- Computational Intelligence to Predict Health and Environmental Risks (CIPHER) Center, University of North Carolina at Charlotte, Charlotte, NC, United States of America
| | - Britney Phippen
- Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, United States of America
| | - Adam Reitzel
- Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC, United States of America
- Computational Intelligence to Predict Health and Environmental Risks (CIPHER) Center, University of North Carolina at Charlotte, Charlotte, NC, United States of America
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Clevenger T, Paz J, Stafford A, Amos D, Hayes AW. An Evaluation of Zebrafish, an Emerging Model Analyzing the Effects of Toxicants on Cognitive and Neuromuscular Function. Int J Toxicol 2024; 43:46-62. [PMID: 37903286 DOI: 10.1177/10915818231207966] [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] [Indexed: 11/01/2023]
Abstract
An emerging alternative to conventional animal models in toxicology research is the zebrafish. Their accelerated development, regenerative capacity, transparent physical appearance, ability to be genetically manipulated, and ease of housing and care make them feasible and efficient experimental models. Nonetheless, their most esteemed asset is their 70% (+) genetic similarity with the human genome, which allows the model to be used in a variety of clinically relevant studies. With these attributes, we propose the zebrafish is an excellent model for analyzing cognitive and neuromuscular responses when exposed to toxicants. Neurocognition can be readily analyzed using visual discrimination, memory and learning, and social behavior testing. Neuromuscular function can be analyzed using techniques such as the startle response, assessment of activity level, and evaluation of critical swimming speed. Furthermore, selectively mutated zebrafish is another novel application of this species in behavioral and pharmacological studies, which can be exploited in toxicological studies. There is a critical need in biomedical research to discover ethical and cost-effective methods to develop new products, including drugs. Through mutagenesis, zebrafish models have become key in meeting this need by advancing the field in numerous areas of biomedical research.
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Affiliation(s)
| | - Jakob Paz
- Florida College, Temple Terrace, FL, USA
| | | | | | - A Wallace Hayes
- College of Public Health, University of South Florida, Temple Terrace, FL, USA
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Yang M, Fu H, Wang WX. Responses of zebrafish (Danio rerio) cells to antibiotic erythromycin stress at the subcellular levels. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 853:158727. [PMID: 36108847 DOI: 10.1016/j.scitotenv.2022.158727] [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: 07/03/2022] [Revised: 08/30/2022] [Accepted: 09/09/2022] [Indexed: 06/15/2023]
Abstract
Erythromycin (ERY) is one of the most used antibiotics frequently detected in different aquatic environments and may bring burdens to aquatic ecosystems. However, the impacts of antibiotics on aquatic systems other than the antibiotic resistance genes remain largely unknown. In the present study, the responses to ERY exposure at the subcellular-organelle levels were for the first time investigated and imaged over 24 h. Exposure to ERY hampered the zebrafish (Danio rerio) cell growth and decreased the cell viability in a time-dependent mode. Meanwhile, exposure to a low concentration of ERY (73.4 μg L-1) induced reactive oxygen species (ROS) overproduction and lysosomal damage following lysosomal alkalization and swelling. In turn, the lysosomal stress was the major driver of altering the ROS level, superoxide dismutase (SOD) activity, and glutathione (GSH) content. Subsequently, mitochondria displayed dysfunction such as increased mitochondrial ROS, impaired mitophagy, and induced mitochondria-driven apoptosis, as well as impaired mitochondrial electron transport chain and loss of membrane potential. These results collectively demonstrated the subcellular sensitive machinery responses to ERY stress at environmentally relevant and slightly higher sub-lethal concentrations. ERY may induce switching from autophagy to apoptosis with corresponding changes in lysosomal activity, antioxidant activity, and mitochondrial activity. The findings provided important information on the physiological and subcellular responses of fish cells to ERY.
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Affiliation(s)
- Meng Yang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Hongbing Fu
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, 100048 Beijing, China
| | - Wen-Xiong Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China.
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Chaves MDJS, Kulzer J, Pujol de Lima PDR, Barbosa SC, Primel EG. Updated knowledge, partitioning and ecological risk of pharmaceuticals and personal care products in global aquatic environments. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:1982-2008. [PMID: 36124562 DOI: 10.1039/d2em00132b] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Over the last few decades, the occurrence of pharmaceuticals and personal care products (PPCPs) in aquatic environments has generated increasing public concern. In this review, data on the presence of PPCPs in environmental compartments from the past few years (2014-2022) are summarized by carrying out a critical survey of the partitioning among water, sediment, and aquatic organisms. From the available articles on PPCP occurrence in the environment, in Web of Science and Scopus databases, 185 articles were evaluated. Diclofenac, carbamazepine, caffeine, ibuprofen, ciprofloxacin, and sulfamethoxazole were reported to occur in 85% of the studies in at least one of the mentioned matrices. Risk assessment showed a moderate to high environmental risk for these compounds worldwide. Moreover, bioconcentration factors showed that sulfamethoxazole and trimethoprim can bioaccumulate in aquatic organisms, while ciprofloxacin and triclosan present bioaccumulation potential. Regarding spatial distribution, the Asian and European continents presented most studies on the occurrence and effects of PPCPs on the environment, while Africa and Asia are the most contaminated continents. In addition, the impact of COVID-19 on environmental contamination by PPCPs is discussed.
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Affiliation(s)
- Marisa de Jesus Silva Chaves
- Chemistry and Food School, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Federal University of Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul, RS 96201-900, Brazil.
| | - Jonatas Kulzer
- Chemistry and Food School, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Federal University of Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul, RS 96201-900, Brazil.
| | - Paula da Rosa Pujol de Lima
- Chemistry and Food School, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Federal University of Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul, RS 96201-900, Brazil.
| | - Sergiane Caldas Barbosa
- Chemistry and Food School, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Federal University of Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul, RS 96201-900, Brazil.
| | - Ednei Gilberto Primel
- Chemistry and Food School, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Federal University of Rio Grande, Av Itália, km 8, Rio Grande, Rio Grande do Sul, RS 96201-900, Brazil.
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Evaluation of Locomotion Complexity in Zebrafish after Exposure to Twenty Antibiotics by Fractal Dimension and Entropy Analysis. Antibiotics (Basel) 2022; 11:antibiotics11081059. [PMID: 36009928 PMCID: PMC9404773 DOI: 10.3390/antibiotics11081059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/29/2022] [Accepted: 08/03/2022] [Indexed: 11/17/2022] Open
Abstract
Antibiotics are extensively used in aquaculture to prevent bacterial infection and the spread of diseases. Some antibiotics have a relatively longer half-life in water and may induce some adverse effects on the targeted fish species. This study analyzed the potential adverse effects of antibiotics in zebrafish at the behavioral level by a phenomic approach. We conducted three-dimensional (3D) locomotion tracking for adult zebrafish after acute exposure to twenty different antibiotics at a concentration of 100 ppb for 10 days. Their locomotor complexity was analyzed and compared by fractal dimension and permutation entropy analysis. The dimensionality reduction method was performed by combining the data gathered from behavioral endpoints alteration. Principal component and hierarchical analysis conclude that three antibiotics: amoxicillin, trimethoprim, and tylosin, displayed unique characteristics. The effects of these three antibiotics at lower concentrations (1 and 10 ppb) were observed in a follow-up study. Based on the results, these antibiotics can trigger several behavioral alterations in adult zebrafish, even in low doses. Significant changes in locomotor behavioral activity, such as total distance activity, average speed, rapid movement time, angular velocity, time in top/bottom duration, and meandering movement are highly related to neurological motor impairments, anxiety levels, and stress responses were observed. This study provides evidence based on an in vivo experiment to support the idea that the usage of some antibiotics should be carefully addressed since they can induce a significant effect of behavioral alterations in fish.
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The Role of H2O2-Scavenging Enzymes (Ascorbate Peroxidase and Catalase) in the Tolerance of Lemna minor to Antibiotics: Implications for Phytoremediation. Antioxidants (Basel) 2022; 11:antiox11010151. [PMID: 35052655 PMCID: PMC8772849 DOI: 10.3390/antiox11010151] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/03/2022] [Accepted: 01/11/2022] [Indexed: 01/24/2023] Open
Abstract
We investigated the individual and combined contributions of two distinct heme proteins namely, ascorbate peroxidase (APX) and catalase (CAT) on the tolerance of Lemna minor plants to antibiotics. For our investigation, we used specific inhibitors of these two H2O2-scavenging enzymes (p-aminophenol, 3-amino,1,2,4-triazole, and salicylic acid). APX activity was central for the tolerance of this aquatic plant to amoxicillin (AMX), whereas CAT activity was important for avoiding oxidative damage when exposed to ciprofloxacin (CIP). Both monitored enzymes had important roles in the tolerance of Lemna minor to erythromycin (ERY). The use of molecular kinetic approaches to detect and increase APX and/or CAT scavenging activities could enhance tolerance, and, therefore, improve the use of L. minor plants to reclaim antibiotics from water bodies.
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Rocha CS, Kochi LY, Ribeiro GB, Rocha DC, Carneiro DNM, Gomes MP. Evaluating aquatic macrophytes for removing erythromycin from contaminated water: floating or submerged? INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2021; 24:995-1003. [PMID: 34686072 DOI: 10.1080/15226514.2021.1991268] [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] [Indexed: 06/13/2023]
Abstract
Water contamination by antibiotics is an emerging global problem, with impacts on both public health and the environment. Erythromycin has been encountered in bodies of water throughout the world, which demands the development of efficient remediation technologies. We investigated the physiological responses and phytoremediation capacity of four species of aquatic macrophytes, two floating (Salvinia molesta and Lemna minor) and two submerged (Myriophyllum aquaticum and Rotala rotundifolia). The plants were exposed to relevant environmental concentrations of erythromycin (0 and 1.7 µg l-1) in artificially contaminated water for seven days. Physiological evaluations evidenced the ability of that antibiotic to promote oxidative events in those plants, such as the activation of antioxidant enzymes (ascorbate peroxidase and/or catalase). S. molesta exposed to erythromycin demonstrated accumulations of hydrogen peroxide and oxidative damage (lipid peroxidation) that was reflected in growth reductions. The erythromycin removal efficiency of floating plants varied from 9 to 12%, while submerged species varied from 31 to 44%. As such, submerged macrophyte species demonstrated the most efficient removal of erythromycin from contaminated waters, and are therefore more indicated for antibiotic phytoremediation projects.
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Affiliation(s)
- Camila Silva Rocha
- Laboratório de Fisiologia de Plantas sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Centro Politécnico Jardim das Américas, Universidade Federal do Paraná, Curitiba, Brazil
| | - Leticia Yoshie Kochi
- Laboratório de Fisiologia de Plantas sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Centro Politécnico Jardim das Américas, Universidade Federal do Paraná, Curitiba, Brazil
| | - Gabriela Breternitz Ribeiro
- Laboratório de Fisiologia de Plantas sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Centro Politécnico Jardim das Américas, Universidade Federal do Paraná, Curitiba, Brazil
| | - Daiane Cristina Rocha
- Laboratório de Fisiologia de Plantas sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Centro Politécnico Jardim das Américas, Universidade Federal do Paraná, Curitiba, Brazil
| | | | - Marcelo Pedrosa Gomes
- Laboratório de Fisiologia de Plantas sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Centro Politécnico Jardim das Américas, Universidade Federal do Paraná, Curitiba, Brazil
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Jijie R, Mihalache G, Balmus IM, Strungaru SA, Baltag ES, Ciobica A, Nicoara M, Faggio C. Zebrafish as a Screening Model to Study the Single and Joint Effects of Antibiotics. Pharmaceuticals (Basel) 2021; 14:ph14060578. [PMID: 34204339 PMCID: PMC8234794 DOI: 10.3390/ph14060578] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/11/2021] [Accepted: 06/12/2021] [Indexed: 02/06/2023] Open
Abstract
The overuse of antibiotics combined with the limitation of wastewater facilities has resulted in drug residue accumulation in the natural environment. Thus, in recent years, the presence of antibiotic residues in the environment has raised concerns over the potential harmful effects on ecosystems and human health. The in vivo studies represent an essential step to study the potential impact induced by pharmaceutical exposure. Due to the limitations of traditional vertebrate model systems, zebrafish (Danio rerio) has recently emerged as a promising animal model to study the toxic effects of drugs and their therapeutic efficacy. The present review summarizes the recent advances made on the toxicity of seven representative classes of antibiotics, namely aminoglycosides, β-lactams, macrolides, quinolones, sulfonamides, tetracyclines and polyether antibiotics, in zebrafish, as well as the combined effects of antibiotic mixtures, to date. Despite a significant amount of the literature describing the impact of single antibiotic exposure, little information exists on the effects of antibiotic mixtures using zebrafish as an animal model. Most of the research papers on this topic have focused on antibiotic toxicity in zebrafish across different developmental stages rather than on their efficacy assessment.
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Affiliation(s)
- Roxana Jijie
- Marine Biological Station “Prof. dr. I. Borcea”, “Alexandru Ioan Cuza” University of Iasi, Nicolae Titulescu Street, No. 163, 9007018 Agigea, Romania;
- Department of Exact and Natural Sciences, Institute of Interdisciplinary Research, “Alexandru Ioan Cuza” University of Iasi, 11 Carol I, 700506 Iasi, Romania; (I.-M.B.); (S.-A.S.)
- Correspondence: (R.J.); (C.F.)
| | - Gabriela Mihalache
- Integrated Center of Environmental Science Studies in the North Eastern Region (CERNESIM), “Alexandru Ioan Cuza” University of Iasi, 11 Carol I, 700506 Iasi, Romania;
- Department of Horticultural Technologies, “Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, 700440 Iasi, Romania
| | - Ioana-Miruna Balmus
- Department of Exact and Natural Sciences, Institute of Interdisciplinary Research, “Alexandru Ioan Cuza” University of Iasi, 11 Carol I, 700506 Iasi, Romania; (I.-M.B.); (S.-A.S.)
| | - Stefan-Adrian Strungaru
- Department of Exact and Natural Sciences, Institute of Interdisciplinary Research, “Alexandru Ioan Cuza” University of Iasi, 11 Carol I, 700506 Iasi, Romania; (I.-M.B.); (S.-A.S.)
| | - Emanuel Stefan Baltag
- Marine Biological Station “Prof. dr. I. Borcea”, “Alexandru Ioan Cuza” University of Iasi, Nicolae Titulescu Street, No. 163, 9007018 Agigea, Romania;
| | - Alin Ciobica
- Department of Biology, Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, B-dul Carol I, 700505 Iasi, Romania; (A.C.); (M.N.)
| | - Mircea Nicoara
- Department of Biology, Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, B-dul Carol I, 700505 Iasi, Romania; (A.C.); (M.N.)
- Doctoral School of Geosciences, Faculty of Geography-Geology, “Alexandru Ioan Cuza” University of Iasi, B-dul Carol I, 700505 Iasi, Romania
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno, d’Alcontres, 31 98166 S. Agata-Messina, Italy
- Correspondence: (R.J.); (C.F.)
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Lucon-Xiccato T, Bella L, Mainardi E, Baraldi M, Bottarelli M, Sandonà D, Bertolucci C. An Automated Low-Cost Swim Tunnel for Measuring Swimming Performance in Fish. Zebrafish 2021; 18:231-234. [PMID: 33877911 DOI: 10.1089/zeb.2020.1975] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The study of swimming behavior is an important part of fish biology research and the swim tunnel is used to study swimming performance as well as metabolism of fish. In this investigation, we have developed a user-friendly, automated, modular, and low-cost swim tunnel that permits to study the performance of one or more fish separately, as well as a small group of individuals. To validate our swim tunnel, we assessed swimming activity of four different species (zebrafish, medaka, guppy, and cavefish) recording reliable data of swimming behavior and performance. Because swimming behavior has been recently used in different fields from physiology to ecotoxicology, our setup could help researchers with a low-cost solution.
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Affiliation(s)
- Tyrone Lucon-Xiccato
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Laura Bella
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Elena Mainardi
- Department of Engineering, and University of Ferrara, Ferrara, Italy
| | - Mattia Baraldi
- Department of Engineering, and University of Ferrara, Ferrara, Italy
| | | | - Dorianna Sandonà
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Cristiano Bertolucci
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
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Minski VT, Garbinato C, Thiel N, Siebel AM. Erythromycin in the aquatic environment: deleterious effects on the initial development of zebrafish. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2021; 84:56-66. [PMID: 33073732 DOI: 10.1080/15287394.2020.1834477] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Due to the large volume of erythromycin continuously reaching waterbodies and its high persistence, this antibiotic drug has been detected in the aquatic environment at elevated concentrations. Although the problem of the presence of erythromycin in the environment is evident due to its influence in development of antimicrobial resistance, the toxicological consequences on non-target organisms remain to be determined. There are no apparent data on the impact of environmentally relevant concentrations of erythromycin on developing fish. Data on toxic effects during development are essential for evaluation of environmental risk to organisms. Therefore, the aim of this study was to investigate the effects of exposure to erythromycin on certain parameters including hatchability, survival rate, heart rate, and behavior in developing zebrafish. Zebrafish were exposed to a range of environmentally relevant concentrations of antibiotic (0.001, 0.01, 0.1, 1 μg/L) and one concentration 10-fold higher (10 μg/L). Exposure to erythromycin at 0.1 μg/L delayed hatching and decreased survival rate. Exposure to all tested concentrations increased heart rate. Further, exposure to erythromycin at 1 or 10 μg/L enhanced swimming activity. Our results indicated that erythromycin present in the aquatic environment might lead to disabling consequences in developing fish organisms and subsequently may result in ecological imbalance in the natural environment.
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Affiliation(s)
- Valeska Toffolo Minski
- Laboratório de Genética e Ecotoxicologia Molecular, Programa de Pós-Graduação Em Ciências Ambientais, Universidade Comunitária da Região de Chapecó , Chapecó, Brazil
| | - Cristiane Garbinato
- Laboratório de Genética e Ecotoxicologia Molecular, Programa de Pós-Graduação Em Ciências Ambientais, Universidade Comunitária da Região de Chapecó , Chapecó, Brazil
| | - Nathana Thiel
- Laboratório de Genética e Ecotoxicologia Molecular, Programa de Pós-Graduação Em Ciências Ambientais, Universidade Comunitária da Região de Chapecó , Chapecó, Brazil
| | - Anna Maria Siebel
- Laboratório de Genética e Ecotoxicologia Molecular, Programa de Pós-Graduação Em Ciências Ambientais, Universidade Comunitária da Região de Chapecó , Chapecó, Brazil
- Laboratório de Genética e Ecotoxicologia Molecular, Curso de Ciências Biológicas, Universidade Comunitária da Região de Chapecó , Chapecó, Brazil
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A Miniature Intermittent-Flow Respirometry System with a 3D-Printed, Palm-Sized Zebrafish Treadmill for Measuring Rest and Activity Metabolic Rates. SENSORS 2020; 20:s20185088. [PMID: 32906794 PMCID: PMC7570584 DOI: 10.3390/s20185088] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 12/20/2022]
Abstract
Zebrafish are a preferred vertebrate model for evaluating metabolism during development, and for toxicity studies. However, commercially available intermittent-flow respirometry systems (IFRS) do not provide a suitable zebrafish-scaled swimming tunnel with a low water volume and proper flow velocities. We developed a miniature IFRS (mIFRS) with a 3D-printed, palm-sized zebrafish treadmill for measuring the swimming ability and metabolic rate of a single one- or three-month-old zebrafish with and without toxicity treatment. The 3D-printed zebrafish treadmill consists of discrete components assembled together which enables the provision of a temporary closed circulating water flow. The results showed that three-month-old zebrafish of normal physiological status had higher energetic efficiency and could swim at a higher critical swimming speed (Ucrit) of 16.79 cm/s with a lower cost of transport (COTopt) of 0.11 μmol g−1m−1. However, for a single three-month-old zebrafish treated with an antibacterial agent, Ucrit decreased to 45% of normal zebrafish and the COTopt increased to 0.24 μmol g−1m−1, due to the impairment of mitochondria. Our mIFRS provides a low-cost, portable, and readily adaptable tool for studying the swimming performance and energetic metabolism of zebrafish.
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