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Lascaux P, Hoslett G, Tribble S, Trugenberger C, Antičević I, Otten C, Torrecilla I, Koukouravas S, Zhao Y, Yang H, Aljarbou F, Ruggiano A, Song W, Peron C, Deangeli G, Domingo E, Bancroft J, Carrique L, Johnson E, Vendrell I, Fischer R, Ng AWT, Ngeow J, D'Angiolella V, Raimundo N, Maughan T, Popović M, Milošević I, Ramadan K. TEX264 drives selective autophagy of DNA lesions to promote DNA repair and cell survival. Cell 2024:S0092-8674(24)00911-5. [PMID: 39265577 DOI: 10.1016/j.cell.2024.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 06/04/2024] [Accepted: 08/10/2024] [Indexed: 09/14/2024]
Abstract
DNA repair and autophagy are distinct biological processes vital for cell survival. Although autophagy helps maintain genome stability, there is no evidence of its direct role in the repair of DNA lesions. We discovered that lysosomes process topoisomerase 1 cleavage complexes (TOP1cc) DNA lesions in vertebrates. Selective degradation of TOP1cc by autophagy directs DNA damage repair and cell survival at clinically relevant doses of topoisomerase 1 inhibitors. TOP1cc are exported from the nucleus to lysosomes through a transient alteration of the nuclear envelope and independent of the proteasome. Mechanistically, the autophagy receptor TEX264 acts as a TOP1cc sensor at DNA replication forks, triggering TOP1cc processing by the p97 ATPase and mediating the delivery of TOP1cc to lysosomes in an MRE11-nuclease- and ATR-kinase-dependent manner. We found an evolutionarily conserved role for selective autophagy in DNA repair that enables cell survival, protects genome stability, and is clinically relevant for colorectal cancer patients.
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Affiliation(s)
- Pauline Lascaux
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Gwendoline Hoslett
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Sara Tribble
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Camilla Trugenberger
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Ivan Antičević
- DNA Damage Group, Laboratory for Molecular Ecotoxicology, Department for Marine and Environmental Research, Institute Ruđer Bošković, 10000 Zagreb, Croatia
| | - Cecile Otten
- DNA Damage Group, Laboratory for Molecular Ecotoxicology, Department for Marine and Environmental Research, Institute Ruđer Bošković, 10000 Zagreb, Croatia
| | - Ignacio Torrecilla
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Stelios Koukouravas
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Yichen Zhao
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Hongbin Yang
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Ftoon Aljarbou
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Annamaria Ruggiano
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Wei Song
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Cristiano Peron
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK
| | - Giulio Deangeli
- Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 2PY, UK
| | - Enric Domingo
- Department of Oncology, Medical Sciences Division, Old Road Campus Research Building, University of Oxford, Oxford OX3 7DQ, UK
| | - James Bancroft
- Centre for Human Genetics, Nuffield Department of Medicine (NDM), University of Oxford, Oxford OX3 7BN, UK
| | - Loïc Carrique
- Division of Structural Biology, Centre for Human Genetics, Nuffield Department of Medicine (NDM), University of Oxford, Oxford OX3 7BN, UK
| | - Errin Johnson
- Dunn School Bioimaging Facility, Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK
| | - Iolanda Vendrell
- Target Discovery Institute, Nuffield Department of Medicine (NDM), University of Oxford, Oxford OX3 7FZ, UK; Chinese Academy for Medical Sciences Oxford Institute, Nuffield Department of Medicine (NDM), University of Oxford, Oxford OX3 7FZ, UK
| | - Roman Fischer
- Target Discovery Institute, Nuffield Department of Medicine (NDM), University of Oxford, Oxford OX3 7FZ, UK; Chinese Academy for Medical Sciences Oxford Institute, Nuffield Department of Medicine (NDM), University of Oxford, Oxford OX3 7FZ, UK
| | - Alvin Wei Tian Ng
- Lee Kong Chian School of Medicine (LKCMedicine), Nanyang Technological University, Singapore 636921, Singapore
| | - Joanne Ngeow
- Lee Kong Chian School of Medicine (LKCMedicine), Nanyang Technological University, Singapore 636921, Singapore; Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore 169610, Singapore
| | - Vincenzo D'Angiolella
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK; Edinburgh Cancer Research, CRUK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, EH4 2XU Edinburgh, UK
| | - Nuno Raimundo
- Penn State College of Medicine, Department of Cellular and Molecular Physiology, Hershey, PA 17033, USA; Multidisciplinary Institute for Aging, Center for Innovation in Biomedicine and Biotechnology, University of Coimbra, Coimbra 3000-370, Portugal
| | - Tim Maughan
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7BE, UK
| | - Marta Popović
- DNA Damage Group, Laboratory for Molecular Ecotoxicology, Department for Marine and Environmental Research, Institute Ruđer Bošković, 10000 Zagreb, Croatia
| | - Ira Milošević
- Centre for Human Genetics, Nuffield Department of Medicine (NDM), University of Oxford, Oxford OX3 7BN, UK; Multidisciplinary Institute for Aging, Center for Innovation in Biomedicine and Biotechnology, University of Coimbra, Coimbra 3000-370, Portugal
| | - Kristijan Ramadan
- The MRC Weatherall Institute of Molecular Medicine, Department of Oncology, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK; Lee Kong Chian School of Medicine (LKCMedicine), Nanyang Technological University, Singapore 636921, Singapore.
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Anticevic I, Otten C, Popovic M. Tyrosyl-DNA phosphodiesterase 2 (Tdp2) repairs DNA-protein crosslinks and protects against double strand breaks in vivo. Front Cell Dev Biol 2024; 12:1394531. [PMID: 39228401 PMCID: PMC11369425 DOI: 10.3389/fcell.2024.1394531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 06/06/2024] [Indexed: 09/05/2024] Open
Abstract
DNA-protein crosslinks pose a significant challenge to genome stability and cell viability. Efficient repair of DPCs is crucial for preserving genomic integrity and preventing the accumulation of DNA damage. Despite recent advances in our understanding of DPC repair, many aspects of this process, especially at the organismal level, remain elusive. In this study, we used zebrafish as a model organism to investigate the role of TDP2 (Tyrosyl-DNA phosphodiesterase 2) in DPC repair. We characterized the two tdp2 orthologs in zebrafish using phylogenetic, syntenic and expression analysis and investigated the phenotypic consequences of tdp2 silencing in zebrafish embryos. We then quantified the effects of tdp2a and tdp2b silencing on cellular DPC levels and DSB accumulation in zebrafish embryos. Our findings revealed that tdp2b is the main ortholog during embryonic development, while both orthologs are ubiquitously present in adult tissues. Notably, the tdp2b ortholog is phylogenetically closer to human TDP2. Silencing of tdp2b, but not tdp2a, resulted in the loss of Tdp2 activity in zebrafish embryos, accompanied by the accumulation of DPCs and DSBs. Our findings contribute to a more comprehensive understanding of DPC repair at the organismal level and underscore the significance of TDP2 in maintaining genome stability.
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Affiliation(s)
| | | | - Marta Popovic
- DNA Damage Group, Laboratory for Molecular Ecotoxicology, Department for Marine and Environmental Research, Institute Ruder Boskovic, Zagreb, Croatia
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Anticevic I, Otten C, Vinkovic L, Jukic L, Popovic M. Tyrosyl-DNA phosphodiesterase 1 (TDP1) and SPRTN protease repair histone 3 and topoisomerase 1 DNA-protein crosslinks in vivo. Open Biol 2023; 13:230113. [PMID: 37788708 PMCID: PMC10547559 DOI: 10.1098/rsob.230113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 08/14/2023] [Indexed: 10/05/2023] Open
Abstract
DNA-protein crosslinks (DPCs) are frequent and damaging DNA lesions that affect all DNA transactions, which in turn can lead to the formation of double-strand breaks, genomic instability and cell death. At the organismal level, impaired DPC repair (DPCR) is associated with cancer, ageing and neurodegeneration. Despite the severe consequences of DPCs, little is known about the processes underlying repair pathways at the organism level. SPRTN is a protease that removes most cellular DPCs during replication, whereas tyrosyl-DNA phosphodiesterase 1 repairs one of the most abundant enzymatic DPCs, topoisomerase 1-DPC (TOP1-DPC). How these two enzymes repair DPCs at the organism level is currently unknown. We perform phylogenetic, syntenic, structural and expression analysis to compare tyrosyl-DNA phosphodiesterase 1 (TDP1) orthologues between human, mouse and zebrafish. Using the zebrafish animal model and human cells, we demonstrate that TDP1 and SPRTN repair endogenous, camptothecin- and formaldehyde-induced DPCs, including histone H3- and TOP1-DPCs. We show that resolution of H3-DNA crosslinks depends on upstream proteolysis by SPRTN and subsequent peptide removal by TDP1 in RPE1 cells and zebrafish embryos, whereas SPRTN and TDP1 function in different pathways in the repair of endogenous TOP1-DPCs and total DPCs. Furthermore, we have found increased TDP2 expression in TDP1-deficient cells and embryos. Understanding the role of TDP1 in DPCR at the cellular and organismal levels could provide an impetus for the development of new drugs and combination therapies with TOP1-DPC inducing drugs.
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Affiliation(s)
- Ivan Anticevic
- Department for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Institute Ruder Boskovic, Zagreb, Croatia
| | - Cecile Otten
- Department for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Institute Ruder Boskovic, Zagreb, Croatia
| | - Luka Vinkovic
- Department for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Institute Ruder Boskovic, Zagreb, Croatia
| | - Luka Jukic
- Department for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Institute Ruder Boskovic, Zagreb, Croatia
| | - Marta Popovic
- Department for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Institute Ruder Boskovic, Zagreb, Croatia
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4
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Niu S, Cao Y, Chen R, Bedi M, Sanders AP, Ducatman A, Ng C. A State-of-the-Science Review of Interactions of Per- and Polyfluoroalkyl Substances (PFAS) with Renal Transporters in Health and Disease: Implications for Population Variability in PFAS Toxicokinetics. ENVIRONMENTAL HEALTH PERSPECTIVES 2023; 131:76002. [PMID: 37418334 DOI: 10.1289/ehp11885] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/09/2023]
Abstract
BACKGROUND Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in the environment and have been shown to cause various adverse health impacts. In animals, sex- and species-specific differences in PFAS elimination half-lives have been linked to the activity of kidney transporters. However, PFAS molecular interactions with kidney transporters are still not fully understood. Moreover, the impact of kidney disease on PFAS elimination remains unclear. OBJECTIVES This state-of-the-science review integrated current knowledge to assess how changes in kidney function and transporter expression from health to disease could affect PFAS toxicokinetics and identified priority research gaps that should be addressed to advance knowledge. METHODS We searched for studies that measured PFAS uptake by kidney transporters, quantified transporter-level changes associated with kidney disease status, and developed PFAS pharmacokinetic models. We then used two databases to identify untested kidney transporters that have the potential for PFAS transport based on their endogenous substrates. Finally, we used an existing pharmacokinetic model for perfluorooctanoic acid (PFOA) in male rats to explore the influence of transporter expression levels, glomerular filtration rate (GFR), and serum albumin on serum half-lives. RESULTS The literature search identified nine human and eight rat kidney transporters that were previously investigated for their ability to transport PFAS, as well as seven human and three rat transporters that were confirmed to transport specific PFAS. We proposed a candidate list of seven untested kidney transporters with the potential for PFAS transport. Model results indicated PFOA toxicokinetics were more influenced by changes in GFR than in transporter expression. DISCUSSION Studies on additional transporters, particularly efflux transporters, and on more PFAS, especially current-use PFAS, are needed to better cover the role of transporters across the PFAS class. Remaining research gaps in transporter expression changes in specific kidney disease states could limit the effectiveness of risk assessment and prevent identification of vulnerable populations. https://doi.org/10.1289/EHP11885.
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Affiliation(s)
- Shan Niu
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Yuexin Cao
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Ruiwen Chen
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Megha Bedi
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Alison P Sanders
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Alan Ducatman
- Department of Occupational and Environmental Health Sciences, West Virginia University, Morgantown, West Virginia, USA
| | - Carla Ng
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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5
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Liu Y, Qi CL, Li DW, Li HY, Li RM, Yang WD. Microcystin-LR exposure interfered maintenance of colonic microenvironmental homeostasis in rat. Food Chem Toxicol 2023; 173:113611. [PMID: 36657700 DOI: 10.1016/j.fct.2023.113611] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/17/2023]
Abstract
Microcystin-leucine arginine (MCLR) is a phycotoxin produced by cyanobacteria. As a hepatotoxin, increasing evidence suggests that it has some negative effects on the mammal gastrointestinal tract, but further studies are warranted. In this study, we investigated the effects of MCLR on the intestinal epithelial microenvironment by oral administration of MCLR. As expected, MCLR at doses of 200 and 400 μg kg-1 bw showed hepatorenal toxicity in rats but without significant gastrointestinal symptoms. MCLR exposure decreased the thickness of the colonic epithelial mucus layer, and down-regulated the expression of main mucin protein (MUC2), cytoskeletal assembly-related genes (Arpc1a, Enah) and cytoskeletal stability-related genes (Ptk2, Prkca, Actn1, Pxn, Tln1, Cttn, Vcl) in colonic tissue to varying degrees, but did not affect the expression of cell connection-related genes including Zo1, Ocln, Cldn2 and Cdh1. In addition, MCLR exposure had a limited effect on gut bacterial diversity but clearly enriched specific bacteria. Prevotella, which plays a crucial role in balancing health and disease, was inhibited, whereas Muribaculaceae concerning the epithelial barrier, was promoted. Together, our findings demonstrate that MCLR exposure can weaken the colonic epithelial barrier by interfering with the stability of the cytoskeleton, which in turn exacerbates the homeostasis maintenance in the intestinal microenvironment.
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Affiliation(s)
- Yang Liu
- Obstetrics and Gynecology, The First Affiliated Hospital of Jinan University, Guangzhou, China; Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Chun-Li Qi
- Institution of Laboratory Animal, Jinan University, Guangzhou, China
| | - Da-Wei Li
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Hong-Ye Li
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Rui-Man Li
- Obstetrics and Gynecology, The First Affiliated Hospital of Jinan University, Guangzhou, China.
| | - Wei-Dong Yang
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
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6
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Cacialli P, Mailhe MP, Wagner I, Merkler D, Golub R, Bertrand JY. Synergistic prostaglandin E synthesis by myeloid and endothelial cells promotes fetal hematopoietic stem cell expansion in vertebrates. EMBO J 2022; 41:e108536. [PMID: 35924455 PMCID: PMC9531293 DOI: 10.15252/embj.2021108536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/13/2022] [Accepted: 07/14/2022] [Indexed: 11/21/2022] Open
Abstract
During development, hematopoietic stem cells (HSCs) are produced from the hemogenic endothelium and will expand in a transient hematopoietic niche. Prostaglandin E2 (PGE2) is essential during vertebrate development and HSC specification, but its precise source in the embryo remains elusive. Here, we show that in the zebrafish embryo, PGE2 synthesis genes are expressed by distinct stromal cell populations, myeloid (neutrophils, macrophages), and endothelial cells of the caudal hematopoietic tissue. Ablation of myeloid cells, which produce the PGE2 precursor prostaglandin H2 (PGH2), results in loss of HSCs in the caudal hematopoietic tissue, which could be rescued by exogeneous PGE2 or PGH2 supplementation. Endothelial cells contribute by expressing the PGH2 import transporter slco2b1 and ptges3, the enzyme converting PGH2 into PGE2. Of note, differential niche cell expression of PGE2 biosynthesis enzymes is also observed in the mouse fetal liver. Taken altogether, our data suggest that the triad composed of neutrophils, macrophages, and endothelial cells sequentially and synergistically contributes to blood stem cell expansion during vertebrate development.
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Affiliation(s)
- Pietro Cacialli
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva 4, Switzerland
| | | | - Ingrid Wagner
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva 4, Switzerland
| | - Doron Merkler
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva 4, Switzerland.,Division of Clinical Pathology, Department of Diagnostic, University Hospitals of Geneva, Geneva, Switzerland
| | - Rachel Golub
- Unité Lymphocytes et Immunité, Pasteur Institute, Paris Cedex 15, France.,Université de Paris, Paris, France
| | - Julien Y Bertrand
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva 4, Switzerland
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7
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Martyniuk CJ, Buerger AN, Vespalcova H, Rudzanova B, Sohag SR, Hanlon AT, Ginn PE, Craft SL, Smetanova S, Budinska E, Bisesi JH, Adamovsky O. Sex-dependent host-microbiome dynamics in zebrafish: Implications for toxicology and gastrointestinal physiology. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2022; 42:100993. [PMID: 35533547 DOI: 10.1016/j.cbd.2022.100993] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 03/04/2022] [Accepted: 04/18/2022] [Indexed: 06/14/2023]
Abstract
The physiology of males and females can be vastly different, complicating interpretation of toxicological and physiological data. The objectives of this study were to elucidate the sex differences in the microbiome-gastrointestinal (GI) transcriptome of adult zebrafish. We compared microbial composition and diversity in both males and females fed the same diet and housed in the same environment. There were no sex-specific differences in weight gain nor gastrointestinal morphology based on histopathology. There was no difference in gut microbial diversity, richness (Shannon and Chao1 index) nor predicted functional composition of the microbiome between males and females. Prior to post-hoc correction, male zebrafish showed higher abundance for the bacterial families Erythrobacteraceae and Lamiaceae, both belonging to the phyla Actinobacteria and Proteobacteria. At the genus level, Lamia and Altererythrobacter were more dominant in males and an unidentified genus in Bacteroidetes was more abundant in females. There were 16 unique differentially expressed transcripts in the gastrointestinal tissue between male and female zebrafish (FDR corrected, p < 0.05). Relative to males, the mRNA expression for trim35-9, slc25a48, chchd3b, csad, and hsd17b3 were lower in female GI while cyp2k6, adra2c, and bckdk were higher in the female GI. Immune and lipid-related gene network expression differed between the sexes (i.e., cholesterol export and metabolism) as well as networks related to gastric motility, gastrointestinal system absorption and digestion. Such data provide clues as to putative differences in gastrointestinal physiology between male and female zebrafish. This study identifies host-transcriptome differences that can be considered when interpreting the microgenderome of zebrafish in studies investigating GI physiology and toxicology of fishes.
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Affiliation(s)
- Christopher J Martyniuk
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Amanda N Buerger
- Department of Environmental and Global Health and Center for Environmental and Human Toxicology, College of Public Health and Health Professions, University of Florida, Gainesville, FL, USA
| | - Hana Vespalcova
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, Brno, Czech Republic
| | - Barbora Rudzanova
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, Brno, Czech Republic
| | - Shahadur R Sohag
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Amy T Hanlon
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Pamela E Ginn
- Department of Comparative, Diagnostic and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
| | - Serena L Craft
- Department of Comparative, Diagnostic and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
| | - Sona Smetanova
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, Brno, Czech Republic
| | - Eva Budinska
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, Brno, Czech Republic
| | - Joseph H Bisesi
- Department of Environmental and Global Health and Center for Environmental and Human Toxicology, College of Public Health and Health Professions, University of Florida, Gainesville, FL, USA
| | - Ondrej Adamovsky
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA; Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, Brno, Czech Republic.
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8
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Lewis AJ, Yun X, Spooner DE, Kurz MJ, McKenzie ER, Sales CM. Exposure pathways and bioaccumulation of per- and polyfluoroalkyl substances in freshwater aquatic ecosystems: Key considerations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 822:153561. [PMID: 35101505 DOI: 10.1016/j.scitotenv.2022.153561] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/22/2022] [Accepted: 01/26/2022] [Indexed: 05/24/2023]
Abstract
Due to the bioaccumulative behavior, toxicity, and recalcitrance to degradation, per- and polyfluoroalkyl substances (PFAS) are a focus for many researchers investigating freshwater aquatic ecosystems. PFAS are a diverse set of chemicals that accumulate and transport quite differently in the environment depending on the length of their fluoroalkyl chains and their functional groups. This diversity in PFAS chemical characteristics combined with varying environmental factors also impact the bioaccumulation of these compounds in different organisms. In this review, we evaluate environmental factors (such as organic carbon, proteins, lipids, and dissolved cations) as well as PFAS characteristics (head group, chain-length, and concentration) that contribute to the significant variation seen in the literature of bioaccumulation metrics reported for organisms in aquatic ecosystems. Of the factors evaluated, it was found that PFAS concentration, dissolved organic matter, sediment organic matter, and biotransformation of precursor PFAS tended to significantly impact reported bioaccumulation metrics the most. Based on this review, it is highly suggested that future studies provide sufficient details of important environmental factors, specific organism traits/ behavior, and PFAS concentrations/compounds when reporting on bioaccumulation metrics to further fill data gaps and improve our understanding of PFAS in aquatic ecosystems.
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Affiliation(s)
- Asa J Lewis
- Department of Civil, Architectural, and Environmental Engineering, Drexel University, Philadelphia, PA 19104, USA.
| | - Xiaoyan Yun
- Civil and Environmental Engineering Department, Temple University, Philadelphia, PA 19122, USA
| | - Daniel E Spooner
- Department of Biology, Lock Haven University, Lock Haven, PA 17745, USA
| | - Marie J Kurz
- Academy of Natural Sciences of Drexel University, Philadelphia, PA 19103, USA
| | - Erica R McKenzie
- Civil and Environmental Engineering Department, Temple University, Philadelphia, PA 19122, USA
| | - Christopher M Sales
- Department of Civil, Architectural, and Environmental Engineering, Drexel University, Philadelphia, PA 19104, USA
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9
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Shartau RB, Snyman HN, Turcotte L, McCarron P, Bradshaw JC, Johnson SC. Acute microcystin exposure induces reversible histopathological changes in Chinook Salmon (Oncorhynchus tshawytscha) and Atlantic Salmon (Salmo salar). JOURNAL OF FISH DISEASES 2022; 45:729-742. [PMID: 35235682 DOI: 10.1111/jfd.13599] [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: 12/27/2021] [Revised: 02/13/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
Atlantic Salmon (Salmo salar) and Chinook Salmon (Oncorhynchus tshawytscha) develop a severe liver disease called net-pen liver disease (NPLD), which is characterized by hepatic lesions that include megalocytosis and loss of gross liver structure. Based on studies where salmonids have been exposed to microcystin (MC) via intraperitoneal injection, NPLD is believed to be caused by MC exposure, a hepatotoxin produced by cyanobacteria. Despite the link between MC and NPLD, it remains uncertain if environmentally relevant MC exposure is responsible for NPLD. To determine if we could produce histopathology consistent with NPLD, we compared the response of Atlantic and Chinook Salmon sub-lethal MC exposure. Salmon were orally gavaged with saline or MC containing algal paste and sampled over 2 weeks post-exposure. Liver lesions appeared by 6 h but were resolved 2-weeks post-exposure; histopathological changes observed in other tissues were not as widespread, nor was their severity as great as those in the liver. There was no evidence for NPLD due to the absence of hepatic megalocytosis. These results indicate that the development of NPLD is not due to acute MC exposure but may be associated with higher MC concentration occurring in food, long-term exposure through drinking of contaminated seawater and/or interactions with other marine toxins.
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Affiliation(s)
- Ryan B Shartau
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, British Columbia, Canada
- Department of Biology, The University of Texas at Tyler, Tyler, Texas, USA
| | - Heindrich N Snyman
- Animal Health Laboratory, University of Guelph, Kemptville, Ontario, Canada
| | - Lenora Turcotte
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, British Columbia, Canada
| | - Pearse McCarron
- Biotoxin Metrology, National Research Council Canada, Halifax, Nova Scotia, Canada
| | - Julia C Bradshaw
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, British Columbia, Canada
| | - Stewart C Johnson
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, British Columbia, Canada
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10
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Bian Y, He MY, Ling Y, Wang XJ, Zhang F, Feng XS, Zhang Y, Xing SG, Li J, Qiu X, Li YR. Tissue distribution study of perfluorooctanoic acid in exposed zebrafish using MALDI mass spectrometry imaging. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 293:118505. [PMID: 34785291 DOI: 10.1016/j.envpol.2021.118505] [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: 07/21/2021] [Revised: 11/10/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Perfluorooctanoic acid (PFOA) as an emerging environmental contaminant, has become ubiquitous in the environment. It is of significance to study bioconcentration and tissue distribution of aquatic organisms for predicting the persistence of PFOA and its adverse effects on the environment and human body. However, the distribution of PFOA in different tissues is a complex physiological process affected by many factors. It is difficult to be accurately described by a simple kinetic model. In present study, a new strategy was introduced to research the PFOA distribution in tissues and estimate the exposure stages. Zebrafish were continuously exposed to 25 mg/L PFOA for 30 days to simulate environmental process. Matrix-assisted laser desorption ionization mass spectrometry imaging (MALDI-MSI) method was used to monitor the spatio-temporal distribution of PFOA in zebrafish tissues. By analyzing the law of change obtained from the high spatial resolution MSI data, two different enrichment trends in ten tissues were summarized by performing curve fitting. Analyzing the ratio of two types of curves, a new "exposure curve" was defined to evaluate the exposure stages. With this model, three levels (mild, moderate, and deep pollution stage) of PFOA pollution in zebrafish can be simply evaluated.
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Affiliation(s)
- Yu Bian
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China; School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - Mu-Yi He
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Yun Ling
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Xiu-Juan Wang
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Feng Zhang
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China.
| | - Xue-Song Feng
- School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - Yuan Zhang
- School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - Shi-Ge Xing
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Jie Li
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China; School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - Xin Qiu
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China; School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - Yu-Rui Li
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
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11
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Romersi RF, Nicklisch SCT. Interactions of Environmental Chemicals and Natural Products With ABC and SLC Transporters in the Digestive System of Aquatic Organisms. Front Physiol 2022; 12:767766. [PMID: 35095552 PMCID: PMC8793745 DOI: 10.3389/fphys.2021.767766] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/18/2021] [Indexed: 12/03/2022] Open
Abstract
An organism’s diet is a major route of exposure to both beneficial nutrients and toxic environmental chemicals and natural products. The uptake of dietary xenobiotics in the intestine is prevented by transporters of the Solute Carrier (SLC) and ATP Binding Cassette (ABC) family. Several environmental chemicals and natural toxins have been identified to induce expression of these defense transporters in fish and aquatic invertebrates, indicating that they are substrates and can be eliminated. However, certain environmental chemicals, termed Transporter-Interfering Chemicals or TICs, have recently been shown to bind to and inhibit fish and mammalian P-glycoprotein (ABCB1), thereby sensitizing cells to toxic chemical accumulation. If and to what extent other xenobiotic defense or nutrient uptake transporters can also be inhibited by dietary TICs is still unknown. To date, most chemical-transporter interaction studies in aquatic organisms have focused on ABC-type transporters, while molecular interactions of xenobiotics with SLC-type transporters are poorly understood. In this perspective, we summarize current advances in the identification, localization, and functional analysis of protective MXR transporters and nutrient uptake systems in the digestive system of fish and aquatic invertebrates. We collate the existing literature data on chemically induced transporter gene expression and summarize the molecular interactions of xenobiotics with these transport systems. Our review emphasizes the need for standardized assays in a broader panel of commercially important fish and seafood species to better evaluate the effects of TIC and other xenobiotic interactions with physiological substrates and MXR transporters across the aquatic ecosystem and predict possible transfer to humans through consumption.
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12
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Dragojević J, Marakovic N, Popović M, Smital T. Zebrafish (Danio rerio) Oatp2b1 as a functional ortholog of the human OATP2B1 transporter. FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:1837-1849. [PMID: 34546486 DOI: 10.1007/s10695-021-01015-7] [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: 03/26/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
OATP2B1 belongs to a highly conserved organic anion transporting polypeptide (OATP) family of transporters, involved in the cellular uptake of both endogenous and exogenous compounds. The reported substrates of human OATP2B1 include steroid conjugates, bile salts, and thyroid hormones, as well as pharmaceuticals. Human OATP2B1 has orthologous genes in other vertebrate species, including zebrafish (Danio rerio), a widely used model organism in biomedical and environmental research. Our previous studies showed that zebrafish Oatp2b1 was phylogenetically closest to mammalian OATP2B1/Oatp2b1 and that it shares a similar tissue expression pattern. In this study, we aimed at discovering whether zebrafish Oatp2b1 could be a functional ortholog of human and rodent OATP2B1. To test this hypothesis, our primary goal was to obtain the first in vitro and in silico insights related to the structure and potential substrate preferences of zebrafish Oatp2b1. We generated cells transiently and stably transfected with zebrafish Oatp2b1 cloned from zebrafish liver, constructed an Oatp2b1 homology model, developed transport activity assays with model fluorescent substrate Lucifer yellow, and finally utilized this assay to analyze the interaction of zebrafish Oatp2b1 with both physiological and xenobiotic substances. Apart from structure similarities, our data revealed the strongest interaction of zebrafish Oatp2b1 with bile acids, steroid sulfates, thyroid hormones, and bilirubin, as well as xenobiotics bromosulfophthalein and sulfasalazine, which indicates its functional orthology with human OATP2B1.
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Affiliation(s)
- Jelena Dragojević
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia
| | - Nikola Marakovic
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000, Zagreb, Croatia
| | - Marta Popović
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia
| | - Tvrtko Smital
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia.
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13
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Marić P, Ahel M, Maraković N, Lončar J, Mihaljević I, Smital T. Selective interaction of microcystin congeners with zebrafish (Danio rerio) Oatp1d1 transporter. CHEMOSPHERE 2021; 283:131155. [PMID: 34182632 DOI: 10.1016/j.chemosphere.2021.131155] [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: 02/23/2021] [Revised: 06/06/2021] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
Microcystins (MCs) are the most studied cyanotoxins. The uptake of MCs in cells and tissues of mammals and fish species is mostly mediated by organic anion-transporting polypeptides (OATPs in humans and rodents; Oatps in other species), and the Oatp1d1 appears to be a major transporter for MCs in fish. In this study, six MC congeners of varying physicochemical properties (MC-LR, -RR, -YR, -LW, -LF, -LA) were tested by measuring their effect on the uptake of model Oatp1d1 fluorescent substrate Lucifer yellow (LY) in HEK293T cells transiently or stably overexpressing zebrafish Oatp1d1. MC-LW and -LF showed the strongest interaction resulting in an almost complete inhibition of LY transport with IC50 values of 0.21 and 0.26 μM, while congeners -LR, -YR and -LA showed lower inhibitory effects. To discern between Oatp1d1 substrates and inhibitors, results were complemented by Michaelis-Menten kinetics and chemical analytical determinations of MCs uptake, along with molecular docking studies performed using the developed zebrafish Oatp1d1 homology model. Our study showed that Oatp1d1-mediated transport of MCs could be largely dependent on their basic physicochemical properties, with log POW being the most obvious determinant. Finally, apart from determination of the chemical composition of cynobacterial blooms, a reliable risk assessment should take into account the interaction of identified MC congeners with Oatp1d1 as their primary transporter, and herewith we demonstrated that such a comprehensive approach could be based on the use of highly specific in vitro models, accompanied by chemical assessment and in silico molecular docking studies.
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Affiliation(s)
- Petra Marić
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička 54, Zagreb, Croatia
| | - Marijan Ahel
- Laboratory for Analytical Chemistry and Biogeochemistry of Organic Compounds, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička 54, 10000, Zagreb, Croatia
| | - Nikola Maraković
- Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000, Zagreb, Croatia
| | - Jovica Lončar
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička 54, Zagreb, Croatia
| | - Ivan Mihaljević
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička 54, Zagreb, Croatia
| | - Tvrtko Smital
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička 54, Zagreb, Croatia.
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14
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Banerjee S, Maity S, Guchhait R, Chatterjee A, Biswas C, Adhikari M, Pramanick K. Toxic effects of cyanotoxins in teleost fish: A comprehensive review. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 240:105971. [PMID: 34560410 DOI: 10.1016/j.aquatox.2021.105971] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 09/03/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
The phenomenon of eutrophication leads to the global occurrence of algal blooms. Cyanotoxins as produced by many cyanobacterial species can lead to detrimental effects to the biome due to their stability and potential biomagnification along food webs. Therefore, understanding of the potential risks these toxins pose to the most susceptible organisms is an important prerequisite for ecological risks assessment of cyanobacteria blooms. Fishes are an important component of aquatic ecosystems that are prone to direct exposure to cyanotoxins. However, relatively few investigations have focused on measuring the toxic potentials of cyanotoxins in teleost fishes. This review comprehensively describes the major toxicological impacts (such as hepatotoxicity, neurotoxicity, immune toxicity, reproductive toxicity and cytogenotoxicity) of commonly occurring cyanotoxins in teleost fishes. The present work encompasses recent research progresses with special emphasis on the basic molecular mechanisms by which different cyanotoxins impose their toxicities in teleost fishes. The major research areas, which need to be focused on in future scientific investigations, have also been highlighted. Protein kinase inhibition, transcriptional dysregulation, disruption of redox homeostasis and the induction of apoptotic pathways appear to be the key drivers of the toxicological effects of cyanotoxins in fish. Analyses also showed that the impacts of cyanotoxins on specific reproductive processes are relatively less described in teleosts in comparison to mammalian systems. In fact, as compared to other toxicological effects of cyanotoxins, their reproductive toxicity (such as impacts on oocyte development, maturation and their hormonal regulation) is poorly understood in fish, and thus requires further studies. Furthermore, additonal studies characterizing the molecular mechanisms responsible for the cellular uptake of cyanotoxins need to be investigated.
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Affiliation(s)
- Sambuddha Banerjee
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Sukhendu Maity
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Rajkumar Guchhait
- P.G. Department of Zoology, Mahishadal Raj College, Garkamalpur, Purba Medinipur, India
| | - Ankit Chatterjee
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Chayan Biswas
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Madhuchhanda Adhikari
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India
| | - Kousik Pramanick
- Integrative Biology Research Unit, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata 700073, India.
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15
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Zhang Y, Wu D, Fan Z, Li J, Gao L, Wang Y, Wang L. Microcystin-LR induces ferroptosis in intestine of common carp (Cyprinus carpio). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 223:112610. [PMID: 34365207 DOI: 10.1016/j.ecoenv.2021.112610] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/27/2021] [Accepted: 08/03/2021] [Indexed: 06/13/2023]
Abstract
Previous studies provide comprehensive evidence of the environmental hazards and intestinal toxicity of microcystin-LR (MC-LR) exposure. However, little is known about the mechanisms underlying the injury of intestine exposed to MC-LR. Juvenile common carp (Cyprinus carpio) were exposed to MC-LR (0 and 10 μg/L) for 15 days. The results suggest that organic anion-transporting polypeptides 3a1, 4a1, 2b1, and 1d1 mediate MC-LR entry into intestinal tissues. Lesion morphological features (vacuolization, deformation and dilation of the endoplasmic reticulum [ER], absence of mitochondrial cristae in mid-intestine), up-regulated mRNA expressions of ER stress (eukaryotic translation initiation factor 2-alpha kinase 3, endoplasmic reticulum to nucleus signaling 1, activating transcription factor [ATF] 6, ATF4, DNA damage-inducible transcript 3), iron accumulation, and down-regulated activity of glutathione peroxidase (GPx) and glutathione (GSH) content were all typical characteristics of ferroptosis in intestinal tissue following MC-LR exposure. GSH levels in intestinal tissue corroborated as the most influential GSH/GPx 4- related metabolic pathway in response to MC-LR exposure. Verrucomicrobiota, Planctomycetes, Bdellovibrionota, Firmicutes and Cyanobacteria were correlated with the ferroptosis-related GSH following MC-LR exposure. These findings provide new perspectives of the ferroptosis mechanism of MC-LR-induced intestinal injury in the common carp.
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Affiliation(s)
- Yuanyuan Zhang
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
| | - Di Wu
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
| | - Ze Fan
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
| | - Jinnan Li
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
| | - Lei Gao
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
| | - Yu'e Wang
- Heilongjiang Provincial Key Laboratory of Laboratory Animal and Comparative Medicine, Laboratory Animal and Comparative Medicine, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China.
| | - Liansheng Wang
- Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
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16
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Wang C, Wang T, Lian BW, Lai S, Li S, Li YM, Tan WJ, Wang B, Mei W. Developmental toxicity of cryptotanshinone on the early-life stage of zebrafish development. Hum Exp Toxicol 2021; 40:S278-S289. [PMID: 34423663 DOI: 10.1177/09603271211009954] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cryptotanshinone (Cry) has multiple potential functions in treating different diseases. Most studies on Cry focus on its pharmacological effects and mechanisms, but toxicological reports on Cry are rare. Zebrafish is used as a model organism in drug development as it saves costs and time. This work aimed to investigate the toxicity of Cry on zebrafish. Results showed that growth retardation, pericardial edema, and scoliosis occurred when zebrafish embryos were exposed to Cry, indicating its teratogenic effects. Cell apoptosis was observed in the brainstem area of embryos using acridine orange staining, and qPCR showed that caspase-3 was increased in Cry-exposed embryos. The results of locomotor activity and touched-evoke escape reaction experiments showed that Cry significantly reduced the swimming speed and escape reaction time of larvae.
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Affiliation(s)
- C Wang
- Department of Pharmacology, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Department of Pharmaceutical Chemistry, Guangdong Province Engineering Technology Center for Molecular Probes & Biomedical Imaging, Guangzhou, People's Republic of China
| | - T Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - B-W Lian
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - S Lai
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - S Li
- Department of Pharmacology, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Department of Pharmaceutical Chemistry, Guangdong Province Engineering Technology Center for Molecular Probes & Biomedical Imaging, Guangzhou, People's Republic of China
| | - Y-M Li
- Department of Pharmacology, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Department of Pharmaceutical Chemistry, Guangdong Province Engineering Technology Center for Molecular Probes & Biomedical Imaging, Guangzhou, People's Republic of China
| | - W-J Tan
- Department of Food Safety, School of Food Science, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - B Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China
| | - W Mei
- Department of Pharmacology, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, People's Republic of China.,Department of Pharmaceutical Chemistry, Guangdong Province Engineering Technology Center for Molecular Probes & Biomedical Imaging, Guangzhou, People's Republic of China
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17
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An EAV-HP insertion in the promoter region of SLCO1B3 has pleiotropic effects on chicken liver metabolism based on the transcriptome and proteome analysis. Sci Rep 2021; 11:7571. [PMID: 33828143 PMCID: PMC8026973 DOI: 10.1038/s41598-021-87054-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 03/23/2021] [Indexed: 02/01/2023] Open
Abstract
Solute carrier organic anion transporter 1B3 (SLCO1B3) is an important liver primarily highly expressed gene, its encoded protein (OATP1B3) involved in the transport of multi-specific endogenous and exogenous substances. We previously reported that an EAV-HP inserted mutation (IM+) in the 5' flanking region of SLCO1B3 was the causative mutation of chicken blue eggs, and a further research showed that IM+ significantly reduced the expression of SLCO1B3 in liver. Herein, we confirmed a cholate response element (IR-1) played an important role in activating SLCO1B3 and in vitro experiments showed that the activation of IR-1 can be significantly reduced by the EAV-HP IM+ . We performed transcriptome and proteomic analysis using the same set of IM+ and IM- liver tissues from Yimeng hens (a Chinese indigenous breed) to study the effect of SLCO1B3 and OATP1B3 expression reduction on chicken liver function. The results showed that common differential expression pathways were screened out from both transcriptome and proteome, in which fatty acid metabolism and drug metabolism-cytochrome P450 were significantly enriched in the KEGG analysis. The lipid-related metabolism was weakened in IM+ group, which was validated by serum biochemical assay. We unexpectedly found that EAV-HP fragment was highly expressed in the liver of the IM+ chickens. We cloned the EAV-HP full-length transcript and obtained the complete open reading frame. It is worth noting that there was some immune related differential expressed genes, such as NFKBIZ, NFKBIA, and IL1RL1, which were higher expressed in the IM+ group, which may due to the high expression of EAV-HP. Our study showed that EAV-HP IM+ reduced the expression of SLCO1B3 in liver, resulting in the decrease of fatty metabolism and exogenous substance transport capacity. The mutation itself also expressed in the liver and may be involved in the immune process. The mechanism needs further study.
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18
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Chen G, Wang L, Wang M, Hu T. Comprehensive insights into the occurrence and toxicological issues of nodularins. MARINE POLLUTION BULLETIN 2021; 162:111884. [PMID: 33307402 DOI: 10.1016/j.marpolbul.2020.111884] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/01/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
The occurrence of cyanobacterial toxins is being increasingly reported. Nodularins (NODs) are one of the cyanotoxins group mainly produced by Nodularia spumigena throughout the world. NODs may exert adverse effects on animal and human health, and NOD-R variant is the most widely investigated. However, research focused on them is still limited. In order to understand the realistic risk well, the aim of this review is to compile the available information in the scientific literature regarding NODs, including their sources, distribution, structural characteristics, physicochemical properties, biosynthesis and degradation, adverse effects in vitro and vivo, and toxicokinetics. More data is urgently needed to integrate the cumulative or synergistic effects of NODs on different species and various cells to better understand, anticipate and aggressively manage their potential toxicity after both short- and long-term exposure in ecosystem, and to minimize or prevent the adverse effects on human health, environment and the economy.
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Affiliation(s)
- Guoliang Chen
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Linping Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Mingxing Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China
| | - Tingzhang Hu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400030, China.
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19
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Wei H, Wang S, Xu EG, Liu J, Li X, Wang Z. Synergistic toxicity of microcystin-LR and Cu to zebrafish (Danio rerio). THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 713:136393. [PMID: 31955075 DOI: 10.1016/j.scitotenv.2019.136393] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/19/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
Toxic cyanobacterial blooms often coincide with metal pollution in a freshwater environment because of surface run-off enriched with nutrients and metals. However, the joint toxic effects of cyanobacterial toxins and metals on aquatic animals remain unknown. In this study, single and joint toxic effects and mechanisms of microcystin-LR (MCLR) and copper (Cu) were investigated in the early development of zebrafish (Danio rerio). The LC5072-h values were 2.79 mg/L for MCLR and 3.23 mg/L for Cu. The sublethal concentrations of MCLR (≤600 μg/L) did not affect the normal development of zebrafish but increased its hatchability. Strong synergistic toxic effects were observed after co-exposure to MCLR and Cu at environmental concentrations (≤60 μg/L). The synergistic toxic effects of these two compounds could be attributed to the increased bioaccumulation of MCLR and Cu, which was mediated by MCLR transporters (e.g., oatp1d1 and oatp2b1) and Cu transporters (e.g., ctr1 and atp7a), in zebrafish. Such bioaccumulation caused oxidative stress, as suggested by the disrupted gene expression of anti-oxidative enzymes (e.g., Cu/Zn-SOD, Mn-SOD, and CAT). Our results revealed for the first time the synergistic toxic effects and potential toxic mechanism of MCLR-Cu in aquatic animals. These synergistic effects should be considered when assessing the ecological risk of toxic cyanobacterial blooms.
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Affiliation(s)
- Huimin Wei
- Key Laboratory for Environment and Disaster Monitoring and Evaluation Hubei, Institute of Geodesy and Geophysics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430077, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shao Wang
- The Affiliated Kangning Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Elvis Genbo Xu
- Department of Chemical Engineering, McGill University, 3610 University Street, Montréal, Québec H3A 0C5, Canada; Department of Biology, University of Southern Denmark, Odense DK-5230, Denmark
| | - Jin Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Xi Li
- The Affiliated Kangning Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.
| | - Zhi Wang
- Key Laboratory for Environment and Disaster Monitoring and Evaluation Hubei, Institute of Geodesy and Geophysics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430077, China.
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20
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Annunziato KM, Jantzen CE, Gronske MC, Cooper KR. Subtle morphometric, behavioral and gene expression effects in larval zebrafish exposed to PFHxA, PFHxS and 6:2 FTOH. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 208:126-137. [PMID: 30669116 PMCID: PMC6396680 DOI: 10.1016/j.aquatox.2019.01.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 01/11/2019] [Accepted: 01/11/2019] [Indexed: 05/06/2023]
Abstract
Recent studies of perfluoroalkylated substances (PFASs) have focused on the toxicity of long chain PFASs, such as PFOS or PFOA, which have been demonstrated to cause an array of developmental and behavioral effects. However, less is known about low molecular weight PFASs and alternatives. This study examined the morphometric and behavioral effects in zebrafish following developmental exposures of C6 PFASs: perfluorohexanoic acid, PFHxA, perfluorohexane sulfonate, PFHxS, and 6:2 fluorotelomer alcohol, 6:2 FTOH. Embryos were exposed to 0.02-20 μM concentrations of these compounds from the high stage (˜3 h post fertilization, hpf) until 120 hpf. Morphometric and gene expression endpoints were examined at 120 hpf. Genes selected for analysis were previously shown to be altered in zebrafish developmentally exposed to PFOS and PFOA. Additionally, exposed larvae were transferred to clean water and reared until 14 days post fertilization, dpf, when behavioral assays were completed and morphometric endpoints examined. While PFHxA was found to be the most acutely toxic at 120 hpf, few morphometric effects were observed. Gene expression was the most sensitive endpoint with significant increased tgfb1a, bdnf, and ap1s1 expression observed with PFHxA exposure. PFHxS exposure produced morphometric effects in the larvae, specifically increased length and yolk sac area at 2 and 20 μM. This phenotype persisted to the 14 dpf time point, where these larvae additionally displayed decreased distance traveled and crosses through the center of the arena of the behavioral assay. Exposure to 6:2 FTOH caused no morphometric effects at 120 hpf, and this compound was the least acutely toxic. However, expression of both tgfb1a and bdnf were increased by greater than 2 fold change at this time point. Effects also persisted to 14 dpf where a significant increase in distance traveled and velocity were observed in the behavioral assay. This study demonstrates effects on behavioral, morphometric and gene expression endpoints with developmental PFHxA, PFHxS, and 6:2 FTOH exposures in zebrafish.
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Affiliation(s)
- Kate M Annunziato
- Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA.
| | - Carrie E Jantzen
- Department of Environmental Science, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Melissa C Gronske
- Department of Animal Science, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Keith R Cooper
- Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA; Department of Environmental Science, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA; Department of Animal Science, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA.
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21
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Chang E, Hogstrand C, Miller TH, Owen SF, Bury NR. The Use of Molecular Descriptors To Model Pharmaceutical Uptake by a Fish Primary Gill Cell Culture Epithelium. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:1576-1584. [PMID: 30589539 PMCID: PMC6503469 DOI: 10.1021/acs.est.8b04394] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Modeling approaches such as quantitative structure-activity relationships (QSARs) use molecular descriptors to predict the bioavailable properties of a compound in biota. However, these models have mainly been derived based on empirical data for lipophilic neutral compounds and may not predict the uptake of ionizable compounds. The majority of pharmaceuticals are ionizable, and freshwaters can have a range of pH values that affect speciation. In this study, we assessed the uptake of 10 pharmaceuticals (acetazolamide, beclomethasone, carbamazepine, diclofenac, gemfibrozil, ibuprofen, ketoprofen, norethindrone, propranolol, and warfarin) with differing modes of action and physicochemical properties (p Ka, log S, log D, log Kow, molecular weight (MW), and polar surface area (PSA)) by an in vitro primary fish gill cell culture system (FIGCS) for 24 h in artificial freshwater. Principal component analysis (PCA) and partial least-squares (PLS) regression was used to determine the molecular descriptors that influence the uptake rates. Ionizable drugs were taken up by FIGCS; a strong positive correlation was observed between log S and the uptake rate, and a negative correlation was observed between p Ka, log D, and MW and the uptake rate. This approach shows that models can be derived on the basis of the physicochemical properties of pharmaceuticals and the use of an in vitro gill system to predict the uptake of other compounds. There is a need for a robust and validated model for gill uptake that could be used in a tiered risk assessment to prioritize compounds for experimental testing.
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Affiliation(s)
- Elisabeth
D. Chang
- King’s
College London, Department of Nutritional
Sciences, Franklin Wilkins Building, 150 Stamford Street, London, SE1 9NH, United Kingdom
| | - Christer Hogstrand
- King’s
College London, Department of Nutritional
Sciences, Franklin Wilkins Building, 150 Stamford Street, London, SE1 9NH, United Kingdom
- E-mail:
| | - Thomas H. Miller
- King’s
College London, Department of Analytical,
Environmental and Forensic Sciences, Franklin Wilkins Building, 150 Stamford Street, London, SE1 9NH, United Kingdom
| | - Stewart F. Owen
- AstraZeneca, Global Safety, Health & Environment, Alderley Park, Macclesfield, Cheshire SK10 4TF, United Kingdom
| | - Nic R. Bury
- King’s
College London, Department of Nutritional
Sciences, Franklin Wilkins Building, 150 Stamford Street, London, SE1 9NH, United Kingdom
- University
of Suffolk, School of Science,
Technology and Engineering, James Hehir Building, University Quays, Ipswich, Suffolk IP3 0AQ, United Kingdom
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22
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Kurogi K, Yoshihama M, Williams FE, Kenmochi N, Sakakibara Y, Suiko M, Liu MC. Identification of zebrafish steroid sulfatase and comparative analysis of the enzymatic properties with human steroid sulfatase. J Steroid Biochem Mol Biol 2019; 185:110-117. [PMID: 30118815 PMCID: PMC6289849 DOI: 10.1016/j.jsbmb.2018.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 07/11/2018] [Accepted: 08/08/2018] [Indexed: 11/19/2022]
Abstract
Steroid sulfatase (STS) plays an important role in the regulation of steroid hormones. Metabolism of steroid hormones in zebrafish has been investigated, but the action of steroid sulfatase remains unknown. In this study, a zebrafish sts was cloned, expressed, purified, and characterized in comparison with the orthologous human enzyme. Enzymatic assays demonstrated that similar to human STS, zebrafish Sts was most active in catalyzing the hydrolysis of estrone-sulfate and estradiol-sulfate, among five steroid sulfates tested as substrates. Kinetic analyses revealed that the Km values of zebrafish Sts and human STS differed with respective substrates, but the catalytic efficiency as reflected by the Vmax/Km appeared comparable, except for DHEA-sulfate with which zebrafish Sts appeared less efficient. While zebrafish Sts was catalytically active at 28 °C, the enzyme appeared more active at 37 °C and with similar Km values to those determined at 28 °C. Assays performed in the presence of different divalent cations showed that the activities of both zebrafish and human STSs were stimulated by Ca2+, Mg2+, and Mn2+, and inhibited by Zn+2 and Fe2+. EMATE and STX64, two known mammalian steroid sulafatase inhibitors, were shown to be capable of inhibiting the activity of zebrafish Sts. Collectively, the results obtained indicated that zebrafish Sts exhibited enzymatic characteristics comparable to the human STS, suggesting that the physiological function of STS may be conserved between zebrafish and humans.
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Affiliation(s)
- Katsuhisa Kurogi
- Department of Pharmacology, College of Pharmacy, University of Toledo Health Science Campus, Toledo, OH 43614, USA; Biochemistry and Applied Biosciences, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Maki Yoshihama
- Department of Pharmacology, College of Pharmacy, University of Toledo Health Science Campus, Toledo, OH 43614, USA; Frontier Research Center, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Frederick E Williams
- Department of Pharmacology, College of Pharmacy, University of Toledo Health Science Campus, Toledo, OH 43614, USA
| | - Naoya Kenmochi
- Frontier Research Center, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Yoichi Sakakibara
- Biochemistry and Applied Biosciences, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Masahito Suiko
- Biochemistry and Applied Biosciences, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Ming-Cheh Liu
- Department of Pharmacology, College of Pharmacy, University of Toledo Health Science Campus, Toledo, OH 43614, USA.
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23
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Willi RA, Fent K. Interaction of environmental steroids with organic anion transporting polypeptide (Oatp1d1) in zebrafish (Danio rerio). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2670-2676. [PMID: 30055005 DOI: 10.1002/etc.4231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 06/24/2018] [Accepted: 07/11/2018] [Indexed: 06/08/2023]
Abstract
Steroid hormones in the aquatic environment may pose a risk to fish health due to their ubiquitous presence and high biological activity. At present, the uptake process and toxicokinetics of steroids in fish are poorly known, in particular the role of cell membrane transporters. We investigated the interaction of 17 endogenous and environmental steroids with the zebrafish organic anion transporting peptide (Oatp1d1) uptake transporter, which is prominently expressed in liver and kidneys. We selected steroids of different classes including androstenedione (A4), progesterone (P4), and its metabolites, as well as glucocorticoids and spironolactone, and analyzed their interaction with Oatp1d1 by competitive inhibition of the uptake of the fluorescent substrate Lucifer Yellow. The half-maximal inhibition (IC50) values derived from sigmoid inhibition curves were lowest for P4, and the order of increasing IC50 values was as follows: 17α-hydroxyprogesterone > clobetasol propionate > spironolactone > 21α-hydroxyprogesterone > fludrocortisone acetate and additional glucocorticoids. The interaction activity showed a positive correlation with the lipophilicity of the steroids. Our data show that different classes of steroids interact with Oatp1d1 with different activity (either by uptake or inhibition, or both). This is of importance, because in consequence, steroids may interfere with the transport of endogenous substrates, and thus physiological processes. Moreover, steroids may alter cellular trafficking of environmental contaminants by competitive inhibition of this transporter. Environ Toxicol Chem 2018;37:2670-2676. © 2018 SETAC.
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Affiliation(s)
- Raffael Alois Willi
- School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
| | - Karl Fent
- School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
- Department of Environmental Systems Science, Institute of Biogeochemistry and Pollution Dynamics, Swiss Federal Institute of Technology (ETH Zürich), Zürich, Switzerland
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24
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Abstract
As one of the most basal living vertebrates, lampreys represent an excellent model system to study the evolution of thyroid hormone (TH) signaling. The lamprey hypothalamic-pituitary-thyroid and reproductive axes overlap functionally. Lampreys have 3 gonadotropin-releasing hormones and a single glycoprotein hormone from the hypothalamus and pituitary, respectively, that regulate both the reproductive and thyroid axes. TH synthesis in larval lampreys takes place in an endostyle that transforms into typical vertebrate thyroid tissue during metamorphosis; both the endostyle and follicular tissue have all the typical TH synthetic components found in other vertebrates. Furthermore, lampreys also have the vertebrate suite of peripheral regulators including TH distributor proteins (THDPs), deiodinases and TH receptors (TRs). Although at the molecular level the components of the lamprey thyroid system are ancestral to other vertebrates, their functions have been largely conserved. TH signaling as it relates to lamprey metamorphosis represents a particularly interesting phenomenon. Unlike other metamorphosing vertebrates, lamprey THs increase throughout the larval period, peak prior to metamorphosis and decline rapidly at the onset of metamorphosis; patterns of deiodinase activity are consistent with these increases and declines. Moreover, goitrogens (which suppress TH levels) initiate precocious metamorphosis, and exogenous TH treatment blocks goitrogen-induced metamorphosis and disrupts natural metamorphosis. Despite this clear physiological difference, TH action via TRs is consistent with higher vertebrates. Based on observations that TRs are upregulated in a tissue-specific fashion during morphogenesis and the finding that lamprey TRs upregulate genes via THs in a fashion similar to higher vertebrates, we propose the following hypothesis for further testing. THs have a dual role in lampreys where high TH levels promote larval feeding and growth and then at the onset of metamorphosis TH levels decrease rapidly; at this time the relatively low TH levels function via TRs in a fashion similar to that of other metamorphosing vertebrates.
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Affiliation(s)
- Richard G Manzon
- Department of Biology, University of Regina, 3737 Wascana Parkway, Regina, SK S4S 0A2, Canada.
| | - Lori A Manzon
- Department of Biology, University of Regina, 3737 Wascana Parkway, Regina, SK S4S 0A2, Canada
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25
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Wen W, Xia X, Hu D, Zhou D, Wang H, Zhai Y, Lin H. Long-Chain Perfluoroalkyl acids (PFAAs) Affect the Bioconcentration and Tissue Distribution of Short-Chain PFAAs in Zebrafish (Danio rerio). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:12358-12368. [PMID: 28988481 DOI: 10.1021/acs.est.7b03647] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Short- and long-chain perfluoroalkyl acids (PFAAs), ubiquitously coexisting in the environment, can be accumulated in organisms by binding with proteins and their binding affinities generally increase with their chain length. Therefore, we hypothesized that long-chain PFAAs will affect the bioconcentration of short-chain PFAAs in organisms. To testify this hypothesis, the bioconcentration and tissue distribution of five short-chain PFAAs (linear C-F = 3-6) were investigated in zebrafish in the absence and presence of six long-chain PFAAs (linear C-F = 7-11). The results showed that the concentrations of the short-chain PFAAs in zebrafish tissues increased with exposure time until steady states reached in the absence of long-chain PFAAs. However, in the presence of long-chain PFAAs, these short-chain PFAAs in tissues increased until peak values reached and then decreased until steady states, and the uptake and elimination rate constants of short-chain PFAAs declined in all tissues and their BCFss decreased by 24-89%. The inhibitive effect of long-chain PFAAs may be attributed to their competition for transporters and binding sites of proteins in zebrafish with short-chain PFAAs. These results suggest that the effect of long-chain PFAAs on the bioconcentration of short-chain PFAAs should be taken into account in assessing the ecological and environmental effects of short-chain PFAAs.
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Affiliation(s)
- Wu Wen
- School of Environment, Beijing Normal University , State Key Laboratory of Water Environment Simulation, Beijing 100875, China
| | - Xinghui Xia
- School of Environment, Beijing Normal University , State Key Laboratory of Water Environment Simulation, Beijing 100875, China
| | - Diexuan Hu
- School of Environment, Beijing Normal University , State Key Laboratory of Water Environment Simulation, Beijing 100875, China
| | - Dong Zhou
- School of Environment, Beijing Normal University , State Key Laboratory of Water Environment Simulation, Beijing 100875, China
| | - Haotian Wang
- School of Environment, Beijing Normal University , State Key Laboratory of Water Environment Simulation, Beijing 100875, China
| | - Yawei Zhai
- School of Environment, Beijing Normal University , State Key Laboratory of Water Environment Simulation, Beijing 100875, China
| | - Hui Lin
- School of Environment, Beijing Normal University , State Key Laboratory of Water Environment Simulation, Beijing 100875, China
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26
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ARMITAGE JAMESM, ERICKSON RUSSELLJ, LUCKENBACH TILL, NG CARLAA, PROSSER RYANS, ARNOT JONA, SCHIRMER KRISTIN, NICHOLS JOHNW. Assessing the bioaccumulation potential of ionizable organic compounds: Current knowledge and research priorities. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:882-897. [PMID: 27992066 PMCID: PMC6172661 DOI: 10.1002/etc.3680] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 07/20/2016] [Accepted: 11/04/2016] [Indexed: 05/19/2023]
Abstract
The objective of the present study was to review the current knowledge regarding the bioaccumulation potential of ionizable organic compounds (IOCs), with a focus on the availability of empirical data for fish. Aspects of the bioaccumulation potential of IOCs in fish that can be characterized relatively well include the pH dependence of gill uptake and elimination, uptake in the gut, and sorption to phospholipids (membrane-water partitioning). Key challenges include the lack of empirical data for biotransformation and binding in plasma. Fish possess a diverse array of proteins that may transport IOCs across cell membranes. Except in a few cases, however, the significance of this transport for uptake and accumulation of environmental contaminants is unknown. Two case studies are presented. The first describes modeled effects of pH and biotransformation on the bioconcentration of organic acids and bases, while the second employs an updated model to investigate factors responsible for accumulation of perfluorinated alkyl acids. The perfluorinated alkyl acid case study is notable insofar as it illustrates the likely importance of membrane transporters in the kidney and highlights the potential value of read-across approaches. Recognizing the current need to perform bioaccumulation hazard assessments and ecological and exposure risk assessment for IOCs, the authors provide a tiered strategy that progresses (as needed) from conservative assumptions (models and associated data) to more sophisticated models requiring chemical-specific information. Environ Toxicol Chem 2017;36:882-897. © 2016 SETAC.
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Affiliation(s)
- JAMES M. ARMITAGE
- University of Toronto Scarborough, Toronto, Ontario, Canada
- Address correspondence to
| | - RUSSELL J. ERICKSON
- Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, US Environmental Protection Agency, Duluth, Minnesota, USA
| | - TILL LUCKENBACH
- Department Bioanalytical Ecotoxicology, UFZ — Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - CARLA A. NG
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - RYAN S. PROSSER
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - JON A. ARNOT
- University of Toronto Scarborough, Toronto, Ontario, Canada
- ARC Arnot Research and Consulting, Toronto, Ontario, Canada
| | - KRISTIN SCHIRMER
- Eawag, Department of Environmental Toxicology, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland
- EPFL, School of Architecture, Civil and Environmental Engineering, Lausanne, Switzerland
- Institute of Biogeochemistry and Pollutant Dynamics, ETHZ, Zurich, Switzerland
| | - JOHN W. NICHOLS
- Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, US Environmental Protection Agency, Duluth, Minnesota, USA
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27
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Paulino MG, Tavares D, Bieczynski F, Pedrão PG, Souza NES, Sakuragui MM, Luquet CM, Terezan AP, Fernandes JB, Giani A, Fernandes MN. Crude extract of cyanobacteria (Radiocystis fernandoi, strain R28) induces liver impairments in fish. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 182:91-101. [PMID: 27886582 DOI: 10.1016/j.aquatox.2016.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 11/12/2016] [Accepted: 11/15/2016] [Indexed: 06/06/2023]
Abstract
Radiocystis fernandoi R28 strain is a cyanobacterium which produces mostly the RR and YR microcystin variants (MC-RR and MC-YR, respectively). The effects of crude extract of the R. fernandoi strain R28 were evaluated on the protein phosphatases and on the structure and ultrastructure of the liver of the Neotropical fish, Hoplias malabaricus, after acute and subchronic exposure. Concomitantly, the accumulation of the majority of MCs was determined in the liver and muscle. The fish were exposed to 120.60 MC-RR+MC-LR kg-fish-1 (=100μg MC-LReq kg-fish-1) for 12 and 96h (one single dose, acute exposure) and 30days (one similar dose every 72h, subchronic exposure). MCs did not accumulate in the muscle but, in the liver, MC-YR accumulated after acute exposure and MC-RR and MC-YR accumulation occurred after subchronic exposure. Protein phosphatase 2A (PP2A) activity was inhibited only after subchronic exposure. Acute exposure induced liver hyperemia, hemorrhage, changes in hepatocytes and cord-like disorganization. At the ultrastructural level, the decreasing of glycogen and lipid levels, the swelling of mitochondria and whirling of endoplasmic reticulum suggested hepatocyte necrosis. Subchronic exposure resulted in a complete disarrangement of cord-like hepatocytes, some recovery of mitochondria and whirling endoplasmic reticulum and extensive connective tissues containing fibrous materials in the liver parenchyma. Despite microcystin toxicity and liver alterations, no tumor was induced by MCs. In conclusion, the increased algal mass of R. fernandoi in tropical freshwater, producing mainly MC-RR and MC-YR variants, results in fish liver impairments.
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Affiliation(s)
- M G Paulino
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - D Tavares
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - F Bieczynski
- Center of Applied Ecology of Neuquen, INIBIOMA, UNCo-CONICET- Ruta Provincial 61, km 3, 8371, Junín de los Andes, Neuquén, Argentina
| | - P G Pedrão
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - N E S Souza
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - M M Sakuragui
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - C M Luquet
- Center of Applied Ecology of Neuquen, INIBIOMA, UNCo-CONICET- Ruta Provincial 61, km 3, 8371, Junín de los Andes, Neuquén, Argentina
| | - A P Terezan
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - J B Fernandes
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - A Giani
- Department of Botany, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - M N Fernandes
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil.
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28
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Hrubik J, Glisic B, Samardzija D, Stanic B, Pogrmic-Majkic K, Fa S, Andric N. Effect of PMA-induced protein kinase C activation on development and apoptosis in early zebrafish embryos. Comp Biochem Physiol C Toxicol Pharmacol 2016; 190:24-31. [PMID: 27521797 DOI: 10.1016/j.cbpc.2016.08.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 08/05/2016] [Accepted: 08/08/2016] [Indexed: 12/19/2022]
Abstract
Protein kinase C (PKC) isoforms have been implicated in several key steps during early development, but the consequences of xenobiotic-induced PKC activation during early embryogenesis are still unknown. In this study, zebrafish embryos were exposed to a range of phorbol 12-myristate 13-acetate (PMA) concentrations (0-200μg/L) at different time points after fertilization. Results showed that 200μgPMA/L caused development of yolk bags, cardiac edema, slow blood flow, pulsating blood flow, slow pulse, elongated heart, lack of tail fins, curved tail, and coagulation. PMA exposure decreased survival rate of the embryos starting within the first 24h and becoming more pronounced after prolonged exposure (96h). PMA increased the number of apoptotic cells in the brain region as demonstrated by acridine orange staining and caused up-regulation of caspase 9 (casp9) and p53 up-regulated modulator of apoptosis (puma) mRNA in whole embryos. PMA caused oxidative stress in the embryos as demonstrated by decreased mRNA expression of catalase and superoxide dismutase 2. Inhibition of Pkc with GF109203X improved overall survival rate, reduced apoptosis in the brain and decreased expression of casp9 and puma in the PMA-exposed embryos. However, Pkc inhibition neither prevented development of deformities nor reversed oxidative stress in the PMA-exposed embryos. These data suggest that direct over-activation of Pkc during early embryogenesis of zebrafish is associated with apoptosis and decreased survival rate of the embryos.
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Affiliation(s)
- Jelena Hrubik
- University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Laboratory for Ecotoxicology, Novi Sad, Serbia
| | - Branka Glisic
- University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Laboratory for Ecotoxicology, Novi Sad, Serbia
| | - Dragana Samardzija
- University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Laboratory for Ecotoxicology, Novi Sad, Serbia
| | - Bojana Stanic
- University of Novi Sad, Faculty of Technical Sciences, Department of Environmental Engineering and Occupational Safety and Health, Novi Sad, Serbia
| | - Kristina Pogrmic-Majkic
- University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Laboratory for Ecotoxicology, Novi Sad, Serbia
| | - Svetlana Fa
- University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Laboratory for Ecotoxicology, Novi Sad, Serbia
| | - Nebojsa Andric
- University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Laboratory for Ecotoxicology, Novi Sad, Serbia.
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29
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Mihaljevic I, Popovic M, Zaja R, Smital T. Phylogenetic, syntenic, and tissue expression analysis of slc22 genes in zebrafish (Danio rerio). BMC Genomics 2016; 17:626. [PMID: 27519738 PMCID: PMC4982206 DOI: 10.1186/s12864-016-2981-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 07/29/2016] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND SLC22 protein family is a member of the SLC (Solute carriers) superfamily of polyspecific membrane transporters responsible for uptake of a wide range of organic anions and cations, including numerous endo- and xenobiotics. Due to the lack of knowledge on zebrafish Slc22 family, we performed initial characterization of these transporters using a detailed phylogenetic and conserved synteny analysis followed by the tissue specific expression profiling of slc22 transcripts. RESULTS We identified 20 zebrafish slc22 genes which are organized in the same functional subgroups as human SLC22 members. Orthologies and syntenic relations between zebrafish and other vertebrates revealed consequences of the teleost-specific whole genome duplication as shown through one-to-many orthologies for certain zebrafish slc22 genes. Tissue expression profiles of slc22 transcripts were analyzed using qRT-PCR determinations in nine zebrafish tissues: liver, kidney, intestine, gills, brain, skeletal muscle, eye, heart, and gonads. Our analysis revealed high expression of oct1 in kidney, especially in females, followed by oat3 and oat2c in females, oat2e in males and orctl4 in females. oct1 was also dominant in male liver. oat2d showed the highest expression in intestine with less noticeable gender differences. All slc22 genes showed low expression in gills, and moderate expression in heart and skeletal muscle. Dominant genes in brain were oat1 in females and oct1 in males, while the highest gender differences were determined in gonads, with dominant expression of almost all slc22 genes in testes and the highest expression of oat2a. CONCLUSIONS Our study offers the first insight into the orthology relationships, gene expression and potential role of Slc22 membrane transporters in zebrafish. Clear orthological relationships of zebrafish slc22 and other vertebrate slc22 genes were established. slc22 members are mostly highly conserved, suggesting their physiological and toxicological importance. One-to-many orthologies and differences in tissue expression patterns of zebrafish slc22 genes in comparison to human orthologs were observed. Our expression data point to partial similarity of zebrafish versus human Slc22 members, with possible compensatory roles of certain zebrafish transporters, whereas higher number of some orthologs implies potentially more diverse and specific roles of these proteins in zebrafish.
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Affiliation(s)
- Ivan Mihaljevic
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia
| | - Marta Popovic
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia.,Department of Oncology, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, UK
| | - Roko Zaja
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia.,Sir William Dunn School of Pathology, University of Oxford, Oxford, England, UK
| | - Tvrtko Smital
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia.
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30
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Kropf C, Segner H, Fent K. ABC transporters and xenobiotic defense systems in early life stages of rainbow trout (Oncorhynchus mykiss). Comp Biochem Physiol C Toxicol Pharmacol 2016; 185-186:45-56. [PMID: 26945521 DOI: 10.1016/j.cbpc.2016.02.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/11/2016] [Accepted: 02/28/2016] [Indexed: 12/17/2022]
Abstract
Embryos of oviparous fish, in contrast to (ovo) viviparous species, develop in the aquatic environment, and therefore need solute transport systems at their body surfaces for maintaining internal homeostasis and defending against potentially harmful substances. We hypothesized that solute transporters undergo changes in tissue distribution from the embryo to the larval stage. We therefore studied the mRNA profiles of eight ABC transporters (abcb1a, abcb1b, abcc1, abcc2, abcc3, abcc4, abcc5, abcg2) and three solute carriers (oatp1d, putative oatp2 putative, mate1) in different body regions (head, yolk sac epithelium, abdominal viscera, skin/muscles) of developing rainbow trout. Additionally, we investigated mRNA levels of phase I (cyp1a, cyp3a) and phase II (gstp, putative ugt1, putative ugt2) biotransformation enzymes. The study covered the developmental period from the eleuthero-embryo stage to the first-feeding larval stage (1-20days post-hatch, dph). At 1dph, transcripts of abcc2, abcc4, abcg2, cyp3a, gstp, putative mate1, and putative oatp2 occurred primarily in the yolk sac epithelium, whereas at later stages expression of these genes was predominantly observed in the abdominal viscera. The functional activity of ABC transporters in fish early life stages was assessed by rhodamine B accumulation assays. Finally, we investigated the potential impact of xenobiotics (clotrimazole, clofibric acid) on the ABC and biotransformation systems of trout early life stages. While clofibric acid had no effect, clotrimazole lead to an increased rhodamine B accumulation. The results provide evidence that the transition from the eleuthero-embryo to the larval stage is accompanied by a major alteration in tissue expression of ABC transporters.
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Affiliation(s)
- Christian Kropf
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; Centre for Fish and Wildlife Health, University of Bern, Länggassstrasse 122, CH-3012 Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences, University of Bern, Switzerland
| | - Helmut Segner
- Centre for Fish and Wildlife Health, University of Bern, Länggassstrasse 122, CH-3012 Bern, Switzerland
| | - Karl Fent
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; Swiss Federal Institute of Technology, ETH Zürich, Institute of Biogeochemistry and Pollution Dynamics, CH-8092 Zürich.
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31
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Lončar J, Popović M, Krznar P, Zaja R, Smital T. The first characterization of multidrug and toxin extrusion (MATE/SLC47) proteins in zebrafish (Danio rerio). Sci Rep 2016; 6:28937. [PMID: 27357367 PMCID: PMC4928094 DOI: 10.1038/srep28937] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/13/2016] [Indexed: 12/13/2022] Open
Abstract
Multidrug and toxin extrusion (MATE) proteins are involved in the extrusion of endogenous compounds and xenobiotics across the plasma membrane. They are conserved from bacteria to mammals, with different numbers of genes within groups. Here, we present the first data on identification and functional characterization of Mate proteins in zebrafish (Danio rerio). Phylogenetic analysis revealed six Mates in teleost fish, annotated as Mate3-8, which form a distinct cluster separated from the tetrapod MATEs/Mates. Synteny analysis showed that zebrafish mate genes are orthologous to human MATEs. Gene expression analysis revealed that all the mate transcripts were constitutively and differentially expressed during embryonic development, followed by pronounced and tissue-specific expression in adults. Functional analyses were performed using transport activity assays with model substrates after heterologous overexpression of five zebrafish Mates in HEK293T cells. The results showed that zebrafish Mates interact with both physiological and xenobiotic substances but also substantially differ with respect to the interacting compounds and interaction strength in comparison to mammalian MATEs/Mates. Taken together, our data clearly indicate a potentially important role for zebrafish Mate transporters in zebrafish embryos and adults and provide a basis for detailed functional characterizations of single zebrafish Mate transporters.
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Affiliation(s)
- Jovica Lončar
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia
| | - Marta Popović
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia.,Oxford Institute for Radiation Oncology, University of Oxford, Oxford, England, United Kingdom
| | - Petra Krznar
- Institute of Molecular Systems Biology, ETH Zurich, Switzerland
| | - Roko Zaja
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia.,Sir William Dunn School of Pathology, University of Oxford, Oxford, England, United Kingdom
| | - Tvrtko Smital
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia
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32
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Drobac D, Tokodi N, Lujić J, Marinović Z, Subakov-Simić G, Dulić T, Važić T, Nybom S, Meriluoto J, Codd GA, Svirčev Z. Cyanobacteria and cyanotoxins in fishponds and their effects on fish tissue. HARMFUL ALGAE 2016; 55:66-76. [PMID: 28073548 DOI: 10.1016/j.hal.2016.02.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 02/03/2016] [Accepted: 02/03/2016] [Indexed: 06/06/2023]
Abstract
Cyanobacteria can produce toxic metabolites known as cyanotoxins. Common and frequently investigated cyanotoxins include microcystins (MCs), nodularin (NOD) and saxitoxins (STXs). During the summer of 2011 extensive cyanobacterial growth was found in several fishponds in Serbia. Sampling of the water and fish (common carp, Cyprinus carpio) was performed. Water samples from 13 fishponds were found to contain saxitoxin, microcystin, and/or nodularin. LC-MS/MS showed that MC-RR was present in samples of fish muscle tissue. Histopathological analyses of fish grown in fishponds with cyanotoxin production showed histopathological damage to liver, kidney, gills, intestines and muscle tissues. This study is among the first so far to report severe hyperplasia of intestinal epithelium and severe degeneration of muscle tissue of fish after cyanobacterial exposure. These findings emphasize the importance of cyanobacterial and cyanotoxin monitoring in fishponds in order to recognize cyanotoxins and their potential effects on fish used for human consumption and, further, on human health.
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Affiliation(s)
- Damjana Drobac
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad 21000, Serbia.
| | - Nada Tokodi
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad 21000, Serbia
| | - Jelena Lujić
- Department of Aquaculture, Szent István University, Páter Károly u. 1, Gödöllő 2100, Hungary
| | - Zoran Marinović
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad 21000, Serbia; Department of Aquaculture, Szent István University, Páter Károly u. 1, Gödöllő 2100, Hungary
| | - Gordana Subakov-Simić
- Faculty of Biology, University of Belgrade, Studentski trg 16, Belgrade 11000, Serbia
| | - Tamara Dulić
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad 21000, Serbia
| | - Tamara Važić
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad 21000, Serbia
| | - Sonja Nybom
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6 A, Turku 20520, Finland
| | - Jussi Meriluoto
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6 A, Turku 20520, Finland; Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad 21000, Serbia
| | - Geoffrey A Codd
- School of the Environment, Flinders University, Adelaide 5042, SA, Australia
| | - Zorica Svirčev
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 2, Novi Sad 21000, Serbia; Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6 A, Turku 20520, Finland
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33
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Consoer DM, Hoffman AD, Fitzsimmons PN, Kosian PA, Nichols JW. Toxicokinetics of perfluorooctane sulfonate in rainbow trout (Oncorhynchus mykiss). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:717-27. [PMID: 26332333 DOI: 10.1002/etc.3230] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 08/01/2015] [Accepted: 08/31/2015] [Indexed: 05/25/2023]
Abstract
Rainbow trout (Oncorhynchus mykiss) confined to respirometer-metabolism chambers were dosed with perfluorooctane sulfonate (PFOS) by intra-arterial injection and sampled to obtain concentration time-course data for plasma and either urine or expired water. The data were then analyzed using a 2-compartment clearance-volume model. Renal and branchial clearance rates (mL/d/kg) determined for all experiments averaged 19% and 81% of total clearance, respectively. Expressed as mean values for all experiments, the steady-state volume of distribution was 277 mL/kg and the terminal half-life was 86.8 d. Additional animals were exposed to PFOS in water, resulting in an average calculated branchial uptake efficiency of 0.36%. The renal clearance rate determined in the present study is approximately 75 times lower than that determined in earlier studies with perfluorooctanoate (PFOA). Previously, it was suggested that PFOA is a substrate for membrane transporters in the trout kidney. The present study suggests that glomerular filtration may be sufficient to explain the observed renal clearance rate for PFOS, although a role for membrane transporters cannot be ruled out. These findings demonstrate that models developed to predict the bioaccumulation of perfluoroalkyl acids by fish must account for differences in renal clearance of individual compounds.
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Affiliation(s)
- Daniel M Consoer
- Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, US Environmental Protection Agency, Duluth, Minnesota, USA
- Department of Toxicology, University of Minnesota-Duluth, Duluth, Minnesota, USA
| | - Alex D Hoffman
- Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, US Environmental Protection Agency, Duluth, Minnesota, USA
| | - Patrick N Fitzsimmons
- Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, US Environmental Protection Agency, Duluth, Minnesota, USA
| | - Patricia A Kosian
- Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, US Environmental Protection Agency, Duluth, Minnesota, USA
| | - John W Nichols
- Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, US Environmental Protection Agency, Duluth, Minnesota, USA
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Faltermann S, Grundler V, Gademann K, Pernthaler J, Fent K. Comparative effects of nodularin and microcystin-LR in zebrafish: 2. Uptake and molecular effects in eleuthero-embryos and adult liver with focus on endoplasmic reticulum stress. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 171:77-87. [PMID: 26748408 DOI: 10.1016/j.aquatox.2015.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 11/12/2015] [Accepted: 12/02/2015] [Indexed: 06/05/2023]
Abstract
Microcystin (MC) and nodularin are structurally similar cyanobacterial toxins that inhibit protein phosphatases. Additional modes of action are poorly known, in particular for nodularin. In our associated work, we showed that active cellular uptake is mediated by the organic anion transporting polypeptide drOatp1d1 in zebrafish (Faltermann et al., 2016). Here, we assessed the transcriptional expression of three genes encoding three uptake transporters during embryonic development from 24h post fertilization (hpf) to 168 hpf. Transcripts of drOatp1d1 and drOatp2b1 are present at 24 hpf. The abundance increased after hatching and remained about constant up to 168 hpf. Transcripts of drOatp2b1 were most abundant, while drOapt1f transcripts showed very low relative abundance compared to drOatp1d1 and drOatp2b1. We further demonstrated the uptake of fluorescent labeled MC-LR in eleuthero-embryos and its accumulation in the glomerulus of the pronephros. An important molecular effect of MC-LR in human liver cells is the induction of endoplasmic reticulum (ER)-stress. Here, we investigated, whether MC-LR and nodularin similarly lead to induction of ER-stress in zebrafish by analyzing changes of mRNA levels of genes indicative of ER-stress. In zebrafish liver organ cultures short- and long-term exposures to 0.15 and 0.3 μmol L(-1) MC-LR, and 0.5 and 1 μM L(-1) nodularin led to significant transcriptional induction of several ER-stress marker genes, including the chaperone glucose regulated protein 78 (bip), the spliced form of x-box binding protein (xbp-1s), the CCAAT-enhancer-binding protein homologous protein (chop) and activating transcription factor 4 (atf4). Furthermore, strong transcriptional changes occurred for tumor necrosis factor alpha (tnfa) and dual specificity phosphatase 5 (dusp5), associated with mitogen activated protein kinase (MAPK) pathway. However, no alterations in transcript levels of pro-apoptotic genes Bcl-2 like protein 4 (bax) and p53 occurred. In contrast to adult liver, MC-LR and nodularin did not result in detectable changes of mRNA levels of selected target genes involved in ER-stress in zebrafish eleuthero-embryos, nor was the abundance of transcripts belonging to the MAPK and pro-apoptosis pathways altered. In conclusion, our data indicate that MC-LR and nodularin have similar transcriptional effects. They lead to changes in mRNA levels of genes that suggest induction of ER-stress, and furthermore, lead to increased level of tnfα mRNA in the adult liver, which suggests a novel (transcriptional) mode of action in fish. However, although taken up by eleuthero-embryos, no transcriptional changes induced by these cyanobacterial toxins were detected. This is probably due to action to specific organs such as liver and kidneys that could not be identified by whole-embryo sampling.
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Affiliation(s)
- Susanne Faltermann
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; University of Zürich, Institute of Plant Biology, Limnological Station, Seestrasse 187, 8802 Kilchberg, Switzerland
| | - Verena Grundler
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Karl Gademann
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Jakob Pernthaler
- University of Zürich, Institute of Plant Biology, Limnological Station, Seestrasse 187, 8802 Kilchberg, Switzerland
| | - Karl Fent
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; Swiss Federal Institute of Technology Zurich (ETHZ), Department of Environmental Systems Science, Institute of Biogeochemistry and Pollution Dynamics, Universitätsstrasse 16, 8092 Zürich, Switzerland.
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35
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Glisic B, Hrubik J, Fa S, Dopudj N, Kovacevic R, Andric N. Transcriptional profiles of glutathione-S-Transferase isoforms, Cyp, and AOE genes in atrazine-exposed zebrafish embryos. ENVIRONMENTAL TOXICOLOGY 2016; 31:233-244. [PMID: 25158112 DOI: 10.1002/tox.22038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 08/06/2014] [Accepted: 08/10/2014] [Indexed: 06/03/2023]
Abstract
Glutathione-S-transferase (GST) superfamily consists of multiple members involved in xenobiotic metabolism. Expressional pattern of the GST isoforms in adult fish has been used as a biomarker of exposure to environmental chemicals. However, GST transcriptional responses vary across organs, thus requiring a cross-tissue examination of multiple mRNAs for GST profiling in an animal after chemical exposure. Zebrafish embryos express all GST isoforms as adult fish and could therefore represent an alternative model for identification of biomarkers of exposure. To evaluate such a possibility, we studied a set of cytosolic and microsomal GST isoform-specific expression profiles in the zebrafish embryos after exposure to atrazine, a widely used herbicide. Expression of the GST isoforms was compared with that of CYP genes involved in the phase I of xenobiotic metabolism and antioxidant enzyme (AOE) genes. Using quantitative real-time PCR, we showed dynamic changes in the expressional pattern of twenty GST isoforms, cyp1a, cyp3a65, ahr2, and four AOEs in early development of zebrafish. Acute (48 and 72 h) exposure of 24 h-old embryos to atrazine, from environmentally relevant (0.005 mg/L) to high (40 mg/L) concentrations, caused a variety of transient, albeit minor changes (<2.5-fold) in the GST isoforms, ahr2 and AOE genes response. However, expression of cyp1a and cyp3a65 mRNA was markedly and consistently induced by high doses of atrazine (5 and 40 mg/L). In summary, an analysis of the response of multiple systems in the zebrafish embryos provided a comprehensive understanding of atrazine toxicity and its potential impact on biological processes.
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Affiliation(s)
- Branka Glisic
- Molecular and Reproductive Toxicology Unit, Laboratory for Ecotoxicology, Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, 21000, Serbia
| | - Jelena Hrubik
- Molecular and Reproductive Toxicology Unit, Laboratory for Ecotoxicology, Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, 21000, Serbia
| | - Svetlana Fa
- Molecular and Reproductive Toxicology Unit, Laboratory for Ecotoxicology, Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, 21000, Serbia
| | - Nela Dopudj
- Molecular and Reproductive Toxicology Unit, Laboratory for Ecotoxicology, Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, 21000, Serbia
| | - Radmila Kovacevic
- Molecular and Reproductive Toxicology Unit, Laboratory for Ecotoxicology, Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, 21000, Serbia
| | - Nebojsa Andric
- Molecular and Reproductive Toxicology Unit, Laboratory for Ecotoxicology, Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, 21000, Serbia
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36
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Faltermann S, Prétôt R, Pernthaler J, Fent K. Comparative effects of nodularin and microcystin-LR in zebrafish: 1. Uptake by organic anion transporting polypeptide Oatp1d1 (Slco1d1). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 171:69-76. [PMID: 26769064 DOI: 10.1016/j.aquatox.2015.11.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 11/12/2015] [Accepted: 11/18/2015] [Indexed: 06/05/2023]
Abstract
Microcystin-LR (MC-LR) and nodularin are hepatotoxins produced by several cyanobacterial species. Their toxicity is based on active cellular uptake and subsequent inhibition of protein phosphatases PP1/2A, leading to hyperphosphorylation and cell death. To date, uptake of MC-LR and nodularin in fish is poorly understood. Here, we investigated the role of the organic anion transporting polypeptide Oatp1d1 in zebrafish (drOatp1d1, Slco1d1) in cellular uptake in zebrafish. We stably transfected CHO and HEK293 cell lines expressing drOatp1d1. In both transfectants, uptake of MC-LR and nodularin was demonstrated by competitive inhibition of uptake with fluorescent substrate lucifer yellow. Direct uptake of MC-LR was demonstrated by immunostaining, and indirectly by the high cytotoxicity in stable transfectants. By means of a synthesized fluorescent labeled MC-LR derivative, direct uptake was further confirmed in HEK293 cells expressing drOatp1d1. Additionally, uptake and toxicity was investigated in the permanent zebrafish liver cell line ZFL. These cells had only a low relative abundance of drOatp1d1, drOatp2b1 and drOatp1f transcripts, which correlated with the lack of MC-LR induced cytotoxicity and transcriptional changes of genes indicative of endoplasmic reticulum stress, a known effect of this toxin. Our study demonstrates that drOatp1d1 functions as an uptake transporter for both MC-LR and nodularin in zebrafish.
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Affiliation(s)
- Susanne Faltermann
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; University of Zürich, Institute of Plant Biology, Limnological Station, Seestrasse 187, 8802 Kilchberg, Switzerland
| | - René Prétôt
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland
| | - Jakob Pernthaler
- University of Zürich, Institute of Plant Biology, Limnological Station, Seestrasse 187, 8802 Kilchberg, Switzerland
| | - Karl Fent
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; Swiss Federal Institute of Technology (ETHZ), Department of Environmental System Sciences, Institute of Biogeochemistry and Pollution Dynamics, Universitätsstrasse 16, 8092 Zürich, Switzerland.
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37
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Fetter E, Smetanová S, Baldauf L, Lidzba A, Altenburger R, Schüttler A, Scholz S. Identification and Characterization of Androgen-Responsive Genes in Zebrafish Embryos. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:11789-11798. [PMID: 26308493 DOI: 10.1021/acs.est.5b01034] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Responsive genes for fish embryos have been identified so far for some endocrine pathways but not for androgens. Using transcriptome analysis and multiple concentration-response modeling, we identified putative androgen-responsive genes in zebrafish embryos exposed to 0.05-5000 nM 11-ketotestosterone for 24 h. Four selected genes with sigmoidal concentration-dependent expression profiles (EC50 = 6.5-30.0 nM) were characterized in detail. The expression of cyp2k22 and slco1f4 was demonstrated in the pronephros; lipca was detected in the liver, and sult2st3 was found in the olfactory organs and choroid plexus. Their expression domains, the function of human orthologs, and a pathway analysis suggested a role of these genes in the metabolism of hormones. Hence, it was hypothesized that they were induced to compensate for elevated hormone levels. The induction of sult2st3 and cyp2k22 by 11-ketotestosterone was repressed by co-exposure to the androgen receptor antagonist nilutamide supporting a potential androgen receptor mediated regulation. Sensitivity (expressed as EC50 values) of sult2st3 and cyp2k22 gene expression induction after exposure to other steroidal hormones (11-ketotestosterone ∼ testosterone > progesterone > cortisol > ethinylestradiol) correlated with their known binding affinities to zebrafish androgen receptor. Hence, these genes might represent potential markers for screening of androgenic compounds in the zebrafish embryo.
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Affiliation(s)
- Eva Fetter
- UFZ - Helmholtz Centre for Environmental Research , Department Bioanalytical Ecotoxicology, Permoserstraße 15, 04318 Leipzig, Germany
| | - Soňa Smetanová
- UFZ - Helmholtz Centre for Environmental Research , Department Bioanalytical Ecotoxicology, Permoserstraße 15, 04318 Leipzig, Germany
- RECETOX - Research Centre for Toxic Compounds in the Environment, Masaryk University , Faculty of Science, Kamenice 753/5, 625 00 Brno, Czech Republic
| | - Lisa Baldauf
- UFZ - Helmholtz Centre for Environmental Research , Department Bioanalytical Ecotoxicology, Permoserstraße 15, 04318 Leipzig, Germany
| | - Annegret Lidzba
- UFZ - Helmholtz Centre for Environmental Research , Department Bioanalytical Ecotoxicology, Permoserstraße 15, 04318 Leipzig, Germany
| | - Rolf Altenburger
- UFZ - Helmholtz Centre for Environmental Research , Department Bioanalytical Ecotoxicology, Permoserstraße 15, 04318 Leipzig, Germany
| | - Andreas Schüttler
- UFZ - Helmholtz Centre for Environmental Research , Department Bioanalytical Ecotoxicology, Permoserstraße 15, 04318 Leipzig, Germany
| | - Stefan Scholz
- UFZ - Helmholtz Centre for Environmental Research , Department Bioanalytical Ecotoxicology, Permoserstraße 15, 04318 Leipzig, Germany
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38
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Dalirsefat SB, Dong X, Deng X. Molecular phylogenetic analysis of Chinese indigenous blue-shelled chickens inferred from whole genomic region of the SLCO1B3 gene. Poult Sci 2015; 94:1776-86. [PMID: 26069255 DOI: 10.3382/ps/pev146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2015] [Indexed: 11/20/2022] Open
Abstract
In total, 246 individuals from 8 Chinese indigenous blue- and brown-shelled chicken populations (Yimeng Blue, Wulong Blue, Lindian Blue, Dongxiang Blue, Lushi Blue, Jingmen Blue, Dongxiang Brown, and Lushi Brown) were genotyped for 21 SNP markers from the SLCO1B3 gene to evaluate phylogenetic relationships. As a representative of nonblue-shelled breeds, White Leghorn was included in the study for reference. A high proportion of SNP polymorphism was observed in Chinese chicken populations, ranging from 89% in Jingmen Blue to 100% in most populations, with a mean of 95% across all populations. The White Leghorn breed showed the lowest polymorphism, accounting for 43% of total SNPs. The mean expected heterozygosity varied from 0.11 in Dongxiang Blue to 0.46 in Yimeng Blue. Analysis of molecular variation (AMOVA) for 2 groups of Chinese chickens based on eggshell color type revealed 52% within-group and 43% between-group variations of the total genetic variation. As expected, FST and Reynolds' genetic distance were greatest between White Leghorn and Chinese chicken populations, with average values of 0.40 and 0.55, respectively. The first and second principal coordinates explained approximately 92% of the total variation and supported the clustering of the populations according to their eggshell color type and historical origins. STRUCTURE analysis showed a considerable source of variation among populations for the clustering into blue-shelled and nonblue-shelled chicken populations. The low estimation of genetic differentiation (FST) between Chinese chicken populations is possibly due to a common historical origin and high gene flow. Remarkably similar population classifications were obtained with all methods used in the study. Aligning endogenous avian retroviral (EAV)-HP insertion sequences showed no difference among the blue-shelled chickens.
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Affiliation(s)
- Seyed Benyamin Dalirsefat
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing 100193, China
| | - Xianggui Dong
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing 100193, China
| | - Xuemei Deng
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing 100193, China
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Steiner K, Zimmermann L, Hagenbuch B, Dietrich D. Zebrafish Oatp-mediated transport of microcystin congeners. Arch Toxicol 2015; 90:1129-39. [PMID: 26055554 DOI: 10.1007/s00204-015-1544-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/28/2015] [Indexed: 01/07/2023]
Abstract
Microcystins (MC), representing >100 congeners being produced by cyanobacteria, are a hazard for aquatic species. As MC congeners vary in their toxicity, the congener composition of a bloom primarily dictates the severity of adverse effects and appears primarily to be governed by toxicokinetics, i.e., whether transport of MCs occurs via organic anion-transporting polypeptides (Oatps). Differences in observed MC toxicity in various fish species suggest differential expression of Oatp subtypes leading to varying tissue distribution of the very same MC congener within different species. The objectives of this study were the functional characterization and analysis of the tissue distribution of Oatp subtypes in zebrafish (Danio rerio) as a surrogate model for cyprinid fish. Zebrafish Oatps (zfOatps) were cloned, and the organ distribution was determined at the mRNA level. zfOatps were transiently expressed in HEK293 cells for functional characterization using the Oatp substrates estrone-3-sulfate, taurocholate and methotrexate and specific MC congeners (MC-LR, MC-RR, MC-LF and MC-LW). Novel zfOatp isoforms were isolated. Among these isoforms, the organ-specific expression of zfOatp1d1 and of members of the zfOatp1f subfamily was identified. At the functional level, zfOatp1d1, zfOatp1f2, zfOatp1f3 and zfOatp1f4 transported at least one of the Oatp substrates, and zfOatp1d1, zfOatp1f2 and zfOatp1f4 were shown to transport MC congeners. MC-LF and MC-LW were generally transported faster than MC-LR and MC-RR. The subtype-specific expression of zfOatp1d1 and of members of the zfOatp1f subfamily as well as differences in the transport of MC congeners could explain the MC congener-dependent differences in toxicity in cyprinids.
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Affiliation(s)
- Konstanze Steiner
- Human and Environmental Toxicology, Department of Biology, University of Konstanz, PO BOX 662, 78457, Constance, Germany
| | - Lisa Zimmermann
- Human and Environmental Toxicology, Department of Biology, University of Konstanz, PO BOX 662, 78457, Constance, Germany
| | - Bruno Hagenbuch
- Pharmacology, Toxicology and Therapeutics, The University of Kansas Medical Center, Kansas City, KS, USA
| | - Daniel Dietrich
- Human and Environmental Toxicology, Department of Biology, University of Konstanz, PO BOX 662, 78457, Constance, Germany.
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Consoer DM, Hoffman AD, Fitzsimmons PN, Kosian PA, Nichols JW. Toxicokinetics of perfluorooctanoate (PFOA) in rainbow trout (Oncorhynchus mykiss). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 156:65-73. [PMID: 25150511 DOI: 10.1016/j.aquatox.2014.07.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 07/30/2014] [Accepted: 07/31/2014] [Indexed: 05/14/2023]
Abstract
Rainbow trout (Oncorhynchus mykiss) confined to respirometer-metabolism chambers were dosed with perfluorooctanoate (PFOA) by intra-arterial (i.a.) injection and sampled to obtain concentration time-course data for plasma, urine, and expired water. The data were then analyzed by compartmental modeling to estimate rates of renal and branchial clearance. Averaged across all animals, the renal clearance rate (1.35mL/h/kg) was more than ten times greater than the branchial clearance rate (0.12mL/h/kg). The average whole-body elimination half-life was 12.6d, which is somewhat longer than values obtained in previous studies with smaller trout. The tissue distribution of PFOA was assessed by collecting tissues at the end of chambered exposures and in a separate tissue time-course experiment. From the time-course study it appeared that an internal steady-state was established within 24h of i.a. injection. Consistent with previous studies, the rank order of PFOA concentration in tissues at steady state was: plasma>liver>kidney>muscle. In a second set of chambered experiments, fish were exposed to PFOA in water to determine the rate of branchial uptake. Branchial uptake rates were too low to assess directly by measuring PFOA concentrations in inspired and expired water. Uptake rate constants (mean 0.19L/d/kg; 0.1% uptake efficiency) were therefore estimated by compartmental modeling using plasma concentration time-course data and model parameters derived from the elimination experiments. It is clear from this effort that elimination of PFOA by trout occurs primarily via the renal route. This finding is consistent with numerous studies of mammals and suggests that trout possess membrane transporters that facilitate the movement of PFOA from plasma to urine.
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Affiliation(s)
- Daniel M Consoer
- US Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, 6201 Congdon Boulevard, Duluth, MN 55804, USA
| | - Alex D Hoffman
- US Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, 6201 Congdon Boulevard, Duluth, MN 55804, USA
| | - Patrick N Fitzsimmons
- US Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, 6201 Congdon Boulevard, Duluth, MN 55804, USA
| | - Patricia A Kosian
- US Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, 6201 Congdon Boulevard, Duluth, MN 55804, USA
| | - John W Nichols
- US Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, 6201 Congdon Boulevard, Duluth, MN 55804, USA.
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Interaction of environmental contaminants with zebrafish organic anion transporting polypeptide, Oatp1d1 (Slco1d1). Toxicol Appl Pharmacol 2014; 280:149-58. [DOI: 10.1016/j.taap.2014.07.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 07/16/2014] [Accepted: 07/21/2014] [Indexed: 01/23/2023]
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Steiner K, Hagenbuch B, Dietrich DR. Molecular cloning and functional characterization of a rainbow trout liver Oatp. Toxicol Appl Pharmacol 2014; 280:534-42. [PMID: 25218291 DOI: 10.1016/j.taap.2014.08.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/25/2014] [Accepted: 08/29/2014] [Indexed: 01/06/2023]
Abstract
Cyanobacterial blooms have an impact on the aquatic ecosystem due to the production of toxins (e.g. microcystins, MCs), which constrain fish health or even cause fish death. However the toxicokinetics of the most abundant toxin, microcystin-LR (MC-LR), are not yet fully understood. To investigate the uptake mechanism, the novel Oatp1d1 in rainbow trout (rtOatp1d1) was cloned, identified and characterized. The cDNA isolated from a clone library consisted of 2772bp containing a 2115bp open reading frame coding for a 705 aa protein with an approximate molecular mass of 80kDa. This fish specific transporter belongs to the OATP1 family and has most likely evolved from a common ancestor of OATP1C1. Real time PCR analysis showed that rtOatp1d1 is predominantly expressed in the liver, followed by the brain while expression in other organs was not detectable. Transient transfection in HEK293 cells was used for further characterization. Like its human homologues OATP1A1, OATP1B1 and OATP1B3, rtOatp1d1 displayed multi-specific transport including endogenous and xenobiotic substrates. Kinetic analyses revealed a Km value of 13.9μM and 13.4μM for estrone-3-sulfate and methotrexate, respectively and a rather low affinity for taurocholate with a Km value of 103μM. Furthermore, it was confirmed that rtOatp1d1 is a MC-LR transporter and therefore most likely plays a key role in the susceptibility of rainbow trout to MC intoxications.
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Affiliation(s)
- Konstanze Steiner
- University of Konstanz, Human- and Environmental Toxicology, 78464 Konstanz, Germany.
| | - Bruno Hagenbuch
- Pharmacology, Toxicology and Therapeutics, The University of Kansas Medical Center, Kansas City 66160, KS, USA.
| | - Daniel R Dietrich
- University of Konstanz, Human- and Environmental Toxicology, 78464 Konstanz, Germany.
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Radulović Z, Porter LM, Kim TK, Mulenga A. Comparative bioinformatics, temporal and spatial expression analyses of Ixodes scapularis organic anion transporting polypeptides. Ticks Tick Borne Dis 2014; 5:287-98. [PMID: 24582512 DOI: 10.1016/j.ttbdis.2013.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 12/01/2013] [Accepted: 12/01/2013] [Indexed: 01/06/2023]
Abstract
Organic anion-transporting polypeptides (Oatps) are an integral part of the detoxification mechanism in vertebrates and invertebrates. These cell surface proteins are involved in mediating the sodium-independent uptake and/or distribution of a broad array of organic amphipathic compounds and xenobiotic drugs. This study describes bioinformatics and biological characterization of 9 Oatp sequences in the Ixodes scapularis genome. These sequences have been annotated on the basis of 12 transmembrane domains, consensus motif D-X-RW-(I,V)-GAWW-X-G-(F,L)-L, and 11 conserved cysteine amino acid residues in the large extracellular loop 5 that characterize the Oatp superfamily. Ixodes scapularis Oatps may regulate non-redundant cross-tick species conserved functions in that they did not cluster as a monolithic group on the phylogeny tree and that they have orthologs in other ticks. Phylogeny clustering patterns also suggest that some tick Oatp sequences transport substrates that are similar to those of body louse, mosquito, eye worm, and filarial worm Oatps. Semi-quantitative RT-PCR analysis demonstrated that all 9 I. scapularis Oatp sequences were expressed during tick feeding. Ixodes scapularis Oatp genes potentially regulate functions during early and/or late-stage tick feeding as revealed by normalized mRNA profiles. Normalized transcript abundance indicates that I. scapularis Oatp genes are strongly expressed in unfed ticks during the first 24h of feeding and/or at the end of the tick feeding process. Except for 2 I. scapularis Oatps, which were expressed in the salivary glands and ovaries, all other genes were expressed in all tested organs, suggesting the significance of I. scapularis Oatps in maintaining tick homeostasis. Different I. scapularis Oatp mRNA expression patterns were detected and discussed with reference to different physiological states of unfed and feeding ticks.
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Affiliation(s)
- Zeljko Radulović
- Texas A & M University AgriLife Research, Department of Entomology, 2475 TAMU, College Station, TX 77843, USA
| | - Lindsay M Porter
- Texas A & M University AgriLife Research, Department of Entomology, 2475 TAMU, College Station, TX 77843, USA
| | - Tae K Kim
- Texas A & M University AgriLife Research, Department of Entomology, 2475 TAMU, College Station, TX 77843, USA
| | - Albert Mulenga
- Texas A & M University AgriLife Research, Department of Entomology, 2475 TAMU, College Station, TX 77843, USA.
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Popovic M, Zaja R, Fent K, Smital T. Molecular characterization of zebrafish Oatp1d1 (Slco1d1), a novel organic anion-transporting polypeptide. J Biol Chem 2013; 288:33894-33911. [PMID: 24126916 DOI: 10.1074/jbc.m113.518506] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The organic anion-transporting polypeptide (OATP/Oatp) superfamily includes a group of polyspecific transporters that mediate transport of large amphipathic, mostly anionic molecules across cell membranes of eukaryotes. OATPs/Oatps are involved in the disposition and elimination of numerous physiological and foreign compounds. However, in non-mammalian species, the functional properties of Oatps remain unknown. We aimed to elucidate the role of Oatp1d1 in zebrafish to gain insights into the functional and structural evolution of the OATP1/Oatp1 superfamily. We show that diversification of the OATP1/Oatp1 family occurs after the emergence of jawed fish and that the OATP1A/Oatp1a and OATP1B/Oatp1b subfamilies appeared at the root of tetrapods. The Oatp1d subfamily emerged in teleosts and is absent in tetrapods. The zebrafish Oatp1d1 is similar to mammalian OATP1A/Oatp1a and OATP1B/Oatp1b members, with the main physiological role in transport and balance of steroid hormones. Oatp1d1 activity is dependent upon pH gradient, which could indicate bicarbonate exchange as a mode of transport. Our analysis of evolutionary conservation and structural properties revealed that (i) His-79 in intracellular loop 3 is conserved within OATP1/Oatp1 family and is crucial for the transport activity; (ii) N-glycosylation impacts membrane targeting and is conserved within the OATP1/Oatp1 family with Asn-122, Asn-133, Asn-499, and Asn-512 residues involved; (iii) the evolutionarily conserved cholesterol recognition interaction amino acid consensus motif is important for membrane localization; and (iv) Oatp1d1 is present in dimeric and possibly oligomeric form in the cell membrane. In conclusion, we describe the first detailed characterization of a new Oatp transporter in zebrafish, offering important insights into the functional evolution of the OATP1/Oatp1 family and the physiological role of Oatp1d1.
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Affiliation(s)
- Marta Popovic
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Rudjer Boskovic Institute, Bijenicka 54, 10 000 Zagreb, Croatia
| | - Roko Zaja
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Rudjer Boskovic Institute, Bijenicka 54, 10 000 Zagreb, Croatia
| | - Karl Fent
- School of Life Sciences, University of Applied Sciences Northwestern Switzerland, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; Department of Environmental System Sciences, Swiss Federal Institute of Technology (ETHZ), CH-8092 Zürich, Switzerland
| | - Tvrtko Smital
- Laboratory for Molecular Ecotoxicology, Division for Marine and Environmental Research, Rudjer Boskovic Institute, Bijenicka 54, 10 000 Zagreb, Croatia.
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Muzzio AM, Noyes PD, Stapleton HM, Lema SC. Tissue distribution and thyroid hormone effects on mRNA abundance for membrane transporters Mct8, Mct10, and organic anion-transporting polypeptides (Oatps) in a teleost fish. Comp Biochem Physiol A Mol Integr Physiol 2013; 167:77-89. [PMID: 24113777 DOI: 10.1016/j.cbpa.2013.09.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 09/26/2013] [Accepted: 09/27/2013] [Indexed: 11/18/2022]
Abstract
Many of the actions of thyroid hormones (THs) occur via TH binding to intracellular receptors. Although it was long thought that THs diffused passively across plasma membranes, it is now recognized that cellular entry is mediated by a variety of membrane transporter proteins. In this study, we identified cDNAs encoding the TH transporters monocarboxylate transferases 8 (mct8) and 10 (mct10) as well as eight distinct organic anion-transporting polypeptide (oatp) proteins from fathead minnow (Pimephales promelas). Analysis of the tissue distribution of transporter mRNAs revealed that mct8 and mct10 transcripts were both abundant in liver, but also present at lower levels in brain, gonad and other tissues. Transcripts encoding oatp1c1 were highly abundant in brain, liver and gonad, and exhibited significant sex differences in the liver and gonad. Treatment of adult male minnows with 3,5,3'-triiodothyronine (T3) or the goitrogen methimazole altered gene transcript abundance for several transporters. Fish given exogenous T3 had reduced mct8 and oapt1c1 mRNA levels in the liver compared to methimazole-treated fish. In the brain, transcripts for mct8, mct10, oatp2b1, and oatp3a1 were each reduced in abundance in fish with elevated T3. As a whole, these results provide evidence that TH status influences the transcriptional dynamics of mct8, mct10 and several Oatp genes including oatp1c1 in teleost fish.
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Affiliation(s)
- Amanda M Muzzio
- Biological Sciences Department, Center for Coastal Marine Sciences, California Polytechnic State University, San Luis Obispo, CA, USA
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Noyes PD, Lema SC, Macaulay LJ, Douglas NK, Stapleton HM. Low level exposure to the flame retardant BDE-209 reduces thyroid hormone levels and disrupts thyroid signaling in fathead minnows. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:10012-21. [PMID: 23899252 PMCID: PMC3778448 DOI: 10.1021/es402650x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Polybrominated diphenyl ether (PBDE) flame retardants have been shown to disrupt thyroid hormone regulation, neurodevelopment, and reproduction in some animals. However, effects of the most heavily used PBDE, decabromodiphenyl ether (BDE-209), on thyroid functioning remain unclear. This study examined low-dose effects of BDE-209 on thyroid hormone levels and signaling in fathead minnows. Adult males received dietary exposures of BDE-209 at a low dose (∼3 ng/g bw-day) and high dose (∼300 ng/g bw-day) for 28 days followed by a 14-day depuration to evaluate recovery. Compared to controls, fish exposed to the low dose for 28 days experienced a 53% and 46% decline in circulating total thyroxine (TT4) and 3,5,3'-triiodothyronine (TT3), respectively, while TT4 and TT3 deficits at the high dose were 59% and 62%. Brain deiodinase activity (T4-ORD) was reduced by ∼65% at both doses. BDE-209 elevated the relative mRNA expression of genes encoding deiodinases, nuclear thyroid receptors, and membrane transporters in the brain and liver in patterns that varied with time and dose, likely in compensation to hypothyroidism. Declines in the gonadal-somatic index (GSI) and increased mortality were also measured. Effects at the low dose were consistent with the high dose, suggesting nonlinear relationships between BDE-209 exposures and thyroid dysfunction.
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Affiliation(s)
- Pamela D. Noyes
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Sean C. Lema
- Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, CA, USA
| | - Laura J. Macaulay
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Nora K. Douglas
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Heather M. Stapleton
- Nicholas School of the Environment, Duke University, Durham, NC, USA
- Phone: 919-613-8717; Fax: 919-684-8741;
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Ng CA, Hungerbühler K. Bioconcentration of perfluorinated alkyl acids: how important is specific binding? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:7214-23. [PMID: 23734664 DOI: 10.1021/es400981a] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Perfluorinated alkyl acids (PFAAs) are important global pollutants with unique pharmacokinetics. Evidence is accumulating that their behavior within organisms is affected by interaction with a number of proteins. In mammals, serum albumin, fatty acid binding proteins (FABPs) and organic anion transporters (OATs) have been identified as important to the tissue distribution, species-specific accumulation, and species- and gender-specific elimination rates of perfluoroalkyl carboxylates and perfluoroalkane sulfonates. Similar pharmacokinetics has been identified in fish. Yet, no mechanistic model exists for the bioaccumulation of PFAAs in fish that explicitly considers protein interactions. In this work, we present the first mechanistic protein-binding bioconcentration model for PFAAs in fish. Our model considers PFAA uptake via passive diffusion at the gills, association with serum albumin in the circulatory and extracellular spaces, association with FABP in the liver, and renal elimination and reabsorption facilitated by OAT proteins. The model is evaluated using measured bioconcentration and tissue distribution data collected in two previous studies of rainbow trout (Oncorhynchus mykiss) and common carp (Cyprinus carpio). Comparing our model with previous attempts to describe PFAA bioconcentration using a nonspecific (partitioning-type) approach shows that inclusion of protein interactions is key to accurately predicting tissue-specific PFAA distribution and bioconcentration.
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Affiliation(s)
- Carla A Ng
- Institute for Chemical and Bioengineering, ETH Zurich, Wolfgang-Pauli-Strasse 10 CH-8093 Zurich, Switzerland.
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Wang Z, Qu L, Yao J, Yang X, Li G, Zhang Y, Li J, Wang X, Bai J, Xu G, Deng X, Yang N, Wu C. An EAV-HP insertion in 5' Flanking region of SLCO1B3 causes blue eggshell in the chicken. PLoS Genet 2013; 9:e1003183. [PMID: 23359636 PMCID: PMC3554524 DOI: 10.1371/journal.pgen.1003183] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 10/28/2012] [Indexed: 12/04/2022] Open
Abstract
The genetic determination of eggshell coloration has not been determined in birds. Here we report that the blue eggshell is caused by an EAV-HP insertion that promotes the expression of SLCO1B3 gene in the uterus (shell gland) of the oviduct in chicken. In this study, the genetic map location of the blue eggshell gene was refined by linkage analysis in an F2 chicken population, and four candidate genes within the refined interval were subsequently tested for their expression levels in the shell gland of the uterus from blue-shelled and non-blue-shelled hens. SLCO1B3 gene was found to be the only one expressed in the uterus of blue-shelled hens but not in that of non-blue-shelled hens. Results from a pyrosequencing analysis showed that only the allele of SLCO1B3 from blue-shelled chickens was expressed in the uterus of heterozygous hens (O*LC/O*N). SLCO1B3 gene belongs to the organic anion transporting polypeptide (OATP) family; and the OATPs, functioning as membrane transporters, have been reported for the transportation of amphipathic organic compounds, including bile salt in mammals. We subsequently resequenced the whole genomic region of SLCO1B3 and discovered an EAV-HP insertion in the 5′ flanking region of SLCO1B3. The EAV-HP insertion was found closely associated with blue eggshell phenotype following complete Mendelian segregation. In situ hybridization also demonstrated that the blue eggshell is associated with ectopic expression of SLCO1B3 in shell glands of uterus. Our finding strongly suggests that the EAV-HP insertion is the causative mutation for the blue eggshell phenotype. The insertion was also found in another Chinese blue-shelled breed and an American blue-shelled breed. In addition, we found that the insertion site in the blue-shelled chickens from Araucana is different from that in Chinese breeds, which implied independent integration events in the blue-shelled chickens from the two continents, providing a parallel evolutionary example at the molecular level. The eggshell color of birds is of wide interest, but the molecular basis remained unknown until our discovery, reported here. The blue eggshell is found not only in wild birds but also in domestic fowls. In this study, we identified that blue eggshell in chickens from different geographical regions is caused by a ∼4.2 kb EAV-HP insertion in the 5′ flanking region of SLCO1B3. The EAV-HP insertion in chicken is a derived mutation in domestic chickens. The genetic determination of blue eggshell in other birds requires further investigation. We also found that the EAV-HP insertions in the chickens from China and America were separate integration events, which presents us with a parallel molecular evolution example driven by artificial selection.
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Affiliation(s)
- Zhepeng Wang
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Lujiang Qu
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Junfeng Yao
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Xiaolin Yang
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Guangqi Li
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Yuanyuan Zhang
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Junying Li
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Xiaotong Wang
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Jirong Bai
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Guiyun Xu
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
| | - Xuemei Deng
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
- * E-mail: (XD); (NY)
| | - Ning Yang
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
- * E-mail: (XD); (NY)
| | - Changxin Wu
- National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics, Breeding, and Reproduction of the Ministry of Agriculture, China Agricultural University, Beijing, China
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Vatine GD, Zada D, Lerer-Goldshtein T, Tovin A, Malkinson G, Yaniv K, Appelbaum L. Zebrafish as a model for monocarboxyl transporter 8-deficiency. J Biol Chem 2012; 288:169-80. [PMID: 23161551 DOI: 10.1074/jbc.m112.413831] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Allan-Herndon-Dudley syndrome (AHDS) is a severe psychomotor retardation characterized by neurological impairment and abnormal thyroid hormone (TH) levels. Mutations in the TH transporter, monocarboxylate transporter 8 (MCT8), are associated with AHDS. MCT8 knock-out mice exhibit impaired TH levels; however, they lack neurological defects. Here, the zebrafish mct8 gene and promoter were isolated, and mct8 promoter-driven transgenic lines were used to show that, similar to humans, mct8 is primarily expressed in the nervous and vascular systems. Morpholino-based knockdown and rescue experiments revealed that MCT8 is strictly required for neural development in the brain and spinal cord. This study shows that MCT8 is a crucial regulator during embryonic development and establishes the first vertebrate model for MCT8 deficiency that exhibits a neurological phenotype.
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Affiliation(s)
- Gad David Vatine
- Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
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