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Jeremias G, Muñiz-González AB, Mendes Gonçalves FJ, Martínez-Guitarte JL, Asselman J, Luísa Pereira J. History of exposure to copper influences transgenerational gene expression responses in Daphnia magna. Epigenetics 2024; 19:2296275. [PMID: 38154067 PMCID: PMC10761054 DOI: 10.1080/15592294.2023.2296275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/13/2023] [Indexed: 12/30/2023] Open
Abstract
The establishment of transgenerational effects following chemical exposure is a powerful phenomenon, capable of modulating ecosystem health beyond exposure periods. This study assessed the transgenerational effects occurring due to copper exposure in the invertebrate D. magna at the transcriptional level, while evaluating the role of exposure history on such responses. Thus, daphnids acclimated for several generations in a copper vs. clean medium were then exposed for one generation (F0) to this metal, and monitored for the following non-exposed generations (F1, F2 and F3). Organisms differing in exposure histories showed remarkably different transcriptional profiles at the F0, with naïve organisms being more profoundly affected. These trends were confirmed for F3 treatments, which presented different transcriptional patterns for genes involved in detoxification, oxidative stress, DNA damage repair, circadian clock functioning and epigenetic regulation. Furthermore, regardless of exposure history, a great number of histone modifier genes were always found transcriptionally altered, thus suggesting the involvement of histone modifications in the response of Daphnia to metal exposure. Lastly, remarkably distinct transgenerational transcriptional responses were found between naïve and non-naïve organisms, thereby highlighting the influence of exposure history on gene expression and confirming the capacity of metals to determine transgenerational transcriptional effects across non-exposed generations.
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Affiliation(s)
- Guilherme Jeremias
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Ana-Belén Muñiz-González
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Aveiro, Portugal
- Biology & Toxicology Group, Department of Mathematics, Physics, and Fluids, National Distance Education University (UNED), Madrid, Spain
| | | | - José-Luis Martínez-Guitarte
- Biology & Toxicology Group, Department of Mathematics, Physics, and Fluids, National Distance Education University (UNED), Madrid, Spain
| | - Jana Asselman
- Blue Growth Research Lab, Ghent University, Ostend, Belgium
| | - Joana Luísa Pereira
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Aveiro, Portugal
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Dong A, Ma Y, Wang X, Jing X, He H, Zhang T, Dong H, Liu W, Fan K, Huo J. Effect of cadmium on histopathological injuries and ultra-structural changes of kidney of the turtle Mauremys reevesii. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:39774-39781. [PMID: 38834928 DOI: 10.1007/s11356-024-33904-8] [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: 12/14/2023] [Accepted: 05/31/2024] [Indexed: 06/06/2024]
Abstract
This research investigated the effect of cadmium on the tissue and cell of kidney of the turtle Mauremys reevesii. Twenty turtles were injected with cadmium at 0, 7.5, 15, 30 mg/kg separately and five turtles were taken in each group at two weeks after exposure. Kidneys were immediately excised and macroscopic pathological changes were observed, then the kidneys were fixed in 4% paraformaldehyde for histopathological examination and fixed in 2.5% (v/v) glutaraldehyde for examination of ultra-structure. The tissues of kidney presented varying degrees of histopathological lesions in cadmium treated turtles by a dose-dependent manner under the light microscope. Under transmission electron microscope, renal tubules cells presented varying degrees of dose-dependent lesions. The results indicated that cadmium can cause cell damages to the kidney, in particular to the mitochondria. Mitochondria can be used as one biomarker in the monitoring of cadmium pollution and its quantitative risk assessments.
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Affiliation(s)
- Aiguo Dong
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Yingying Ma
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Xinling Wang
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Xuejie Jing
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Hui He
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Tianmiao Zhang
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Huidong Dong
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Wei Liu
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Kaifang Fan
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Junfeng Huo
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China.
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Zhang T, Wang X, Zhang Q, Yang D, Zhang X, Liu H, Wang Q, Dong Z, Zhao J. Interactive effects of multiple antibiotic residues and ocean acidification on physiology and metabolome of the bay scallops Argopecten irradians irradians. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168941. [PMID: 38056652 DOI: 10.1016/j.scitotenv.2023.168941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/20/2023] [Accepted: 11/25/2023] [Indexed: 12/08/2023]
Abstract
Coastal areas are confronted with compounding threats arising from both climatic and non-climatic stressors. Antibiotic pollution and ocean acidification are two prevalently concurrent environmental stressors. Yet their interactive effects on marine biota have not been investigated adequately and the compound hazard remain obscure. In this study, bay scallops Argopecten irradians irradians were exposed to multiple antibiotics (sulfamethoxazole, tetracycline, oxytetracycline, norfloxacin, and erythromycin, each at a concentration of 1 μg/L) combined with/without acidic seawater (pH 7.6) for 35 days. The single and interactive effects of the two stressors on A. irradians irradians were determined from multidimensional bio-responses, including energetic physiological traits as well as the molecular underpinning (metabolome and expressions of key genes). Results showed that multiple antibiotics predominantly enhanced the process of DNA repair and replication via disturbing the purine metabolism pathway. This alternation is perhaps to cope with the DNA damage induced by oxidative stress. Ocean acidification mainly disrupted energy metabolism and ammonia metabolism of the scallops, as evidenced by the increased ammonia excretion rate, the decreased O:N ratio, and perturbations in amino acid metabolism pathways. Moreover, the antagonistic effects of multiple antibiotics and ocean acidification caused alternations in the relative abundance of neurotransmitter and gene expression of neurotransmitter receptors, which may lead to neurological disorders in scallops. Overall, the revealed alternations in physiological traits, metabolites and gene expressions provide insightful information for the health status of bivalves in a natural environmental condition under the climate change scenarios.
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Affiliation(s)
- Tianyu Zhang
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xin Wang
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Qianqian Zhang
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China
| | - Dinglong Yang
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China
| | - Xiaoli Zhang
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China
| | - Hui Liu
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China
| | - Qing Wang
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China
| | - Zhijun Dong
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China
| | - Jianmin Zhao
- Key Laboratory of Coastal Biology and Biological Resources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China; Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264117, PR China.
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Kirchner R, Kirchnerová S, Tirpák F, Halo M, Slanina T, Tokárová K, Kováčik A, Miškeje M, Komárňanská V, Greń A, Formicki G, Massányi P. Biogenic Elements and Heavy Metals in Hermann's Tortoises- Testudo hermanni: Effect on Serum Biochemistry and Oxidative Status Parameters. Animals (Basel) 2023; 13:2218. [PMID: 37444016 DOI: 10.3390/ani13132218] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
BACKGROUND Conservation of species diversity is the need of the hour for preserving life forms on Earth. Extinction of any part of the ecosystem has negative impacts on many processes and systems. The objective of this work was to analyze some biochemical and molecular indicators and their correlations to biogenic elements and heavy metals in Testudo hermanni (n = 16). METHODS Biochemical parameters were analyzed using the commercial kit DiaSys and biochemical analyzer Randox RX Monza. Sodium, potassium, and chlorides were measured using the EasyLite analyzer. Oxidative stress was evaluated using colorimetric and luminometric methods. Quantification of chemical elements in the blood was carried out using inductively coupled plasma mass spectrometry (ICPS). RESULTS Biochemical values of analyzed samples from Hermann's tortoises were almost the same as referential values described by multiple authors, with minor aberrations in the total protein parameter. Values of arsenic (As) and nickel (Ni) showed correlation with biochemical parameters and the parameters of oxidative stress. Cadmium (Cd) exhibited correlation with aspartate aminotransferase (AST). CONCLUSIONS This study reports correlations among four heavy metals, and their levels were again correlated with biochemical and molecular parameters in Hermann's tortoises.
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Affiliation(s)
- Róbert Kirchner
- Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
- Institute of Animal Husbandry, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Soňa Kirchnerová
- Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
- Institute of Animal Husbandry, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Filip Tirpák
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Marko Halo
- Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Tomáš Slanina
- Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Katarína Tokárová
- Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Anton Kováčik
- Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Michal Miškeje
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Veronika Komárňanská
- Institute of Animal Husbandry, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Agnieszka Greń
- Institute of Biology, Pedagogical University of Krakow, Podchorazych 2, 30-084 Krakow, Poland
| | - Grzegorz Formicki
- Institute of Biology, Pedagogical University of Krakow, Podchorazych 2, 30-084 Krakow, Poland
| | - Peter Massányi
- Institute of Applied Biology, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
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Du X, Zhou L, Zhu B, Gu L, Yin H, Wang H. The TabHLH35-TaWAK20-TaSPL5 pathway positively regulates Cd stress in wheat. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2023; 136:153. [PMID: 37310523 DOI: 10.1007/s00122-023-04400-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 06/01/2023] [Indexed: 06/14/2023]
Abstract
KEY MESSAGE Cadmium-induced TaWAK20 regulates the cadmium stress response by phosphorylating TaSPL5 in wheat. Receptor-like kinases (RLKs) are thought to play important roles in responses to abiotic stresses in plants. In this study, we identified a cadmium (Cd)-induced RLK in wheat, TaWAK20, which is a positive regulator of the Cd stress response. TaWAK20 is specifically expressed in root tissue. Overexpression of TaWAK20 significantly improved the tolerance of Cd stress in wheat and decreased Cd accumulation in wheat plants by regulating reactive oxygen species production and scavenging. Yeast one-hybrid assays, electrophoretic mobility shift assays, and firefly luciferase activity analyses demonstrated that the TaWAK20 promoter was bound by the TabHLH35 transcription factor. TaWAK20 interacted with and phosphorylated squamosa promoter binding protein-like 5 (TaSPL5). Furthermore, phosphorylation of TaSPL5 increased its DNA-binding activity. In addition, Arabidopsis-expressing phosphorylated TaSPL5 exhibited greater Cd tolerance than Arabidopsis-expressing unphosphorylated TaSPL5. Taken together, these data identify a TabHLH35-TaWAK20-TaSPL5 module that regulates Cd stress.
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Affiliation(s)
- Xuye Du
- School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou Province, China
| | - Lizhou Zhou
- School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou Province, China
| | - Bin Zhu
- School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou Province, China
| | - Lei Gu
- School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou Province, China.
| | - Huayan Yin
- College of Agronomy, Qingdao Agricultural University, Qingdao, Shandong Province, China.
| | - Hongcheng Wang
- School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou Province, China.
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6
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Dong A, Dong H, He H, Dong A, Yan J, Huo J. Effects of Cadmium on Kidney Function of the Freshwater Turtles Mauremys reevesii. Biol Trace Elem Res 2023; 201:3000-3005. [PMID: 35986187 DOI: 10.1007/s12011-022-03397-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 08/15/2022] [Indexed: 11/02/2022]
Abstract
This research studied the effects of cadmium on kidney function of the freshwater turtles Mauremys reevesii. Turtles were injected intraperitoneally with 0, 7.5, 15, and 30 mg kg-1 cadmium separately for once. The samples were gathered to check the kidney index, the contents of TP in kidney tissue, and the levels of CRE and BUN in the plasma of the turtles. Results showed that the concentration of TP was overall decreased with the extension of cadmium exposure time and the increasing of the exposure dose of cadmium. The CRE content in the plasma of each treatment group increased with the prolongation of exposure time in a dose-dependent, and the BUN levels of all poisoned groups showed a trend of increasing. The kidney index of treated turtles increased. In summary, cadmium could induce the increase of turtle kidney index, the content of CRE and BUN in plasma, and the decrease of TP content in the kidney.
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Affiliation(s)
- Aiguo Dong
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Huidong Dong
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Hui He
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Ailing Dong
- Bureau of Agriculture and Rural Affairs of Qianan, Tangshan, Hebei Province, China
| | - Juanjuan Yan
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Junfeng Huo
- Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China.
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7
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Li Z, Qin H, Zhang Y, He X, Bao X, Sun G, Cui C, Xu X, Liu X, Yang J, Zhang G. Transcriptome analysis preliminary reveals the immune response mechanism of golden cuttlefish (Sepia esculenta) larvae exposed to Cd. FISH & SHELLFISH IMMUNOLOGY 2023; 132:108494. [PMID: 36565999 DOI: 10.1016/j.fsi.2022.108494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/18/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
As a well-known marine metal element, Cd can significantly affect bivalve mollusk life processes such as growth and development. However, the effects of Cd on the molecular mechanisms of the economically important cephalopod species Sepia esculenta remain unclear. In this study, S. esculenta larval immunity exposed to Cd is explored based on RNA-Seq. The analyses of GO, KEGG, and protein-protein interaction (PPI) network of 1,471 differentially expressed genes (DEGs) reveal that multiple immune processes are affected by exposure such as inflammatory reaction and cell adhesion. Comprehensive analyses of KEGG signaling pathways and the PPI network are first used to explore Cd-exposed S. esculenta larval immunity, revealing the presence of 16 immune-related key and hub genes involved in exposure response. Results of gene and pathway functional analyses increase our understanding of Cd-exposed S. esculenta larval immunity and improve our overall understanding of mollusk immune functions.
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Affiliation(s)
- Zan Li
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Huimin Qin
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Yining Zhang
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiaohua He
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiaokai Bao
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Guohua Sun
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Cuiju Cui
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiaohui Xu
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiumei Liu
- College of Life Sciences, Yantai University, Yantai, 264005, China
| | - Jianmin Yang
- School of Agriculture, Ludong University, Yantai, 264025, China.
| | - Guoguang Zhang
- School of Agriculture, Ludong University, Yantai, 264025, China; Laizhou Marine Development and Fishery Service Center, Yantai, 261499, China.
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Jeremias G, Veloso T, Gonçalves FJM, Van Nieuwerburgh F, Pereira JL, Asselman J. Multigenerational DNA methylation responses to copper exposure in Daphnia: Potential targets for epigenetic biomarkers? CHEMOSPHERE 2022; 308:136231. [PMID: 36055596 DOI: 10.1016/j.chemosphere.2022.136231] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Epigenetic mechanisms are moving to the forefront of environmental sciences, as environmentally induced epigenetic changes shape biological responses to chemical contamination. This work focused on Daphnia as a representative of potentially threatened freshwater biota, aiming to gain an insight into the involvement of epigenetic mechanisms in their response and eventual adaptation to metal contamination. Copper-induced DNA methylation changes, their potential transgenerational inheritance, and life-history traits were assessed. Organisms with different histories of past exposure to copper were exposed to toxic levels of the element for one generation (F0) and then monitored for three subsequent unexposed generations (F1, F2, and F3). Overall, methylation changes targeted important genes for counteracting the effects of metals and oxidative stress, including dynein light chain, ribosomal kinase and nuclear fragile X mental retardation-interacting protein. Also, contrasting overall and gene-specific methylation responses were observed in organisms differing in their history of exposure to copper, with different transgenerational methylation responses being also identified among the two groups, without apparent life-history costs. Taken together, these results demonstrate the capacity of copper to promote epigenetic transgenerational inheritance in a manner related explicitly to history of exposure, thereby supporting the development and incorporation of epigenetic biomarkers in risk assessment frameworks.
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Affiliation(s)
- Guilherme Jeremias
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal
| | - Telma Veloso
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal; CICECO - Aveiro Institute of Materials & Department of Chemistry, University of Aveiro, Portugal
| | - Fernando J M Gonçalves
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal
| | | | - Joana Luísa Pereira
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal.
| | - Jana Asselman
- Blue Growth Research Lab, Ghent University, Bluebridge Building, Ostend Science Park 1, 8400, Ostend, Belgium
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Schwarzenberger A. Negative Effects of Cyanotoxins and Adaptative Responses of Daphnia. Toxins (Basel) 2022; 14:770. [PMID: 36356020 PMCID: PMC9694520 DOI: 10.3390/toxins14110770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/02/2022] [Accepted: 11/05/2022] [Indexed: 11/10/2022] Open
Abstract
The plethora of cyanobacterial toxins are an enormous threat to whole ecosystems and humans. Due to eutrophication and increases in lake temperatures from global warming, changes in the distribution of cyanobacterial toxins and selection of few highly toxic species/ strains are likely. Globally, one of the most important grazers that controls cyanobacterial blooms is Daphnia, a freshwater model organism in ecology and (eco)toxicology. Daphnia-cyanobacteria interactions have been studied extensively, often focusing on the interference of filamentous cyanobacteria with Daphnia's filtering apparatus, or on different nutritional constraints (the lack of essential amino acids or lipids) and grazer toxicity. For a long time, this toxicity only referred to microcystins. Currently, the focus shifts toward other deleterious cyanotoxins. Still, less than 10% of the total scientific output deals with cyanotoxins that are not microcystins; although these other cyanotoxins can occur just as frequently and at similar concentrations as microcystins in surface water. This review discusses the effects of different cyanobacterial toxins (hepatotoxins, digestive inhibitors, neurotoxins, and cytotoxins) on Daphnia and provides an elaborate and up-to-date overview of specific responses and adaptations of Daphnia. Furthermore, scenarios of what we can expect for the future of Daphnia-cyanobacteria interactions are described by comprising anthropogenic threats that might further increase toxin stress in Daphnia.
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Affiliation(s)
- Anke Schwarzenberger
- Limnological Institute, University Konstanz, Mainaustr. 252, 78464 Konstanz, Germany
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10
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Dias de Farias DS, Rossi S, da Costa Bomfim A, Lima Fragoso AB, Santos-Neto EB, José de Lima Silva F, Lailson-Brito J, Navoni JA, Gavilan SA, Souza do Amaral V. Bioaccumulation of total mercury, copper, cadmium, silver, and selenium in green turtles (Chelonia mydas) stranded along the Potiguar Basin, northeastern Brazil. CHEMOSPHERE 2022; 299:134331. [PMID: 35339524 DOI: 10.1016/j.chemosphere.2022.134331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 12/01/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
Sea turtles face several threats and pollution has become a major concern for their conservation worldwide. We analyzed samples of the liver, muscles, and kidneys of 38 Chelonia mydas stranded along the Potiguar Basin, northeastern Brazil, between 2015 and 2018 to determine the total Hg concentration (THg), as well as the concentrations of Cu, Cd, Ag, and Se. The relation between turtle size and element concentrations revealed a negative correlation for THg and Se (liver, muscles, and kidneys), Cu and Cd (liver and kidneys) and a positive correlation for Ag in the three organs analyzed. Concentrations of THg, Cu, Ag, and Se were high in the liver, highlighting the Cu concentration (median = 25.1150 μg g-1 w.w.), while the kidneys had the highest Cd levels (median = 12.2200 μg g-1 w.w.). There was significant difference between element concentrations and the three organs analyzed, except for Ag and Se concentrations in the muscle and kidney samples. Our study showed that green turtles found in Potiguar Basin, northeastern Brasil, have bioaccumulated inorganic elements which indicate the need of further investigations on the environmental quality of the region.
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Affiliation(s)
- Daniel Solon Dias de Farias
- Programa de Doutorado em Desenvolvimento e Meio Ambiente - DDMA, Universidade Federal do Rio Grande do Norte, Brazil; Projeto Cetáceos da Costa Branca - Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró, Rio Grande do Norte, Brazil; Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/Rio Grande do Norte, Brazil; Laboratório de Morfofisiologia de Vertebrados, Departamento de Morfologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil
| | - Silmara Rossi
- Laboratório de Morfofisiologia de Vertebrados, Departamento de Morfologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil
| | - Aline da Costa Bomfim
- Programa de Doutorado em Desenvolvimento e Meio Ambiente - DDMA, Universidade Federal do Rio Grande do Norte, Brazil; Projeto Cetáceos da Costa Branca - Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró, Rio Grande do Norte, Brazil; Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/Rio Grande do Norte, Brazil; Laboratório de Morfofisiologia de Vertebrados, Departamento de Morfologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil
| | - Ana Bernadete Lima Fragoso
- Projeto Cetáceos da Costa Branca - Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró, Rio Grande do Norte, Brazil; Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/Rio Grande do Norte, Brazil
| | - Elitieri Batista Santos-Neto
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Flávio José de Lima Silva
- Projeto Cetáceos da Costa Branca - Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró, Rio Grande do Norte, Brazil; Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/Rio Grande do Norte, Brazil
| | - José Lailson-Brito
- Laboratório de Mamíferos Aquáticos e Bioindicadores "Profa. Izabel Gurgel" (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Julio Alejandro Navoni
- Programa de Doutorado em Desenvolvimento e Meio Ambiente - DDMA, Universidade Federal do Rio Grande do Norte, Brazil; Programa de Pós-graduação em Uso Sustentável de Recursos Naturais do Instituto Federal do Rio Grande do Norte/ IFRN, Brazil
| | - Simone Almeida Gavilan
- Projeto Cetáceos da Costa Branca - Universidade do Estado do Rio Grande do Norte (PCCB-UERN), Campus Central, CEP 59600-000, Mossoró, Rio Grande do Norte, Brazil; Centro de Estudos e Monitoramento Ambiental (CEMAM), CEP 59655-000, Areia Branca/Rio Grande do Norte, Brazil; Laboratório de Morfofisiologia de Vertebrados, Departamento de Morfologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil
| | - Viviane Souza do Amaral
- Programa de Doutorado em Desenvolvimento e Meio Ambiente - DDMA, Universidade Federal do Rio Grande do Norte, Brazil; Universidade Federal do Rio Grande do Norte (UFRN). Laboratório de Genética Toxicológica. Departamento de Biologia e Genética, Avenida Senador Salgado Filho, 3000, Lagoa Nova, Natal, Campus Central, RN, Brazil.
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11
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Paten AM, Colin T, Coppin CW, Court LN, Barron AB, Oakeshott JG, Morgan MJ. Non-additive gene interactions underpin molecular and phenotypic responses in honey bee larvae exposed to imidacloprid and thymol. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:152614. [PMID: 34963587 DOI: 10.1016/j.scitotenv.2021.152614] [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: 11/09/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
Understanding the cumulative risk of chemical mixtures at environmentally realistic concentrations is a key challenge in honey bee ecotoxicology. Ecotoxicogenomics, including transcriptomics, measures responses in individual organisms at the molecular level which can provide insights into the mechanisms underlying phenotypic responses induced by one or more stressors and link impacts on individuals to populations. Here, fifth instar honey bee larvae were sampled from a previously reported field experiment exploring the phenotypic impacts of environmentally realistic chronic exposures of the pesticide imidacloprid (5 μg.kg-1 for six weeks) and the acaricide thymol (250 g.kg-1 applied via Apiguard gel in-hive for four weeks), both separately and in combination. RNA-seq was used to discover individual and interactive chemical effects on larval gene expression and to uncover molecular mechanisms linked to reported adult and colony phenotypes. The separate and combined treatments had distinct gene expression profiles which represented differentially affected signaling and metabolic pathways. The molecular signature of the mixture was characterised by additive interactions in canonical stress responses associated with oxidative stress and detoxification, and non-additive interactions in secondary responses including developmental, neurological, and immune pathways. Novel emergent impacts on eye development genes correlated with long-term defects in visual learning performance as adults. This is consistent with these chemicals working through independent modes of action that combine to impact common downstream pathways, and highlights the importance of establishing mechanistic links between molecular and phenotypic responses when predicting effects of chemical mixtures on ecologically relevant population outcomes.
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Affiliation(s)
- Amy M Paten
- Land and Water, CSIRO, Black Mountain, Canberra, ACT 2601, Australia.
| | - Théotime Colin
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Chris W Coppin
- Land and Water, CSIRO, Black Mountain, Canberra, ACT 2601, Australia.
| | - Leon N Court
- Land and Water, CSIRO, Black Mountain, Canberra, ACT 2601, Australia.
| | - Andrew B Barron
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia.
| | - John G Oakeshott
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia; Applied Biosciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Matthew J Morgan
- Land and Water, CSIRO, Black Mountain, Canberra, ACT 2601, Australia.
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12
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Guo H, Sheng N, Guo Y, Wu C, Xie W, Dai J. Exposure to GenX and its novel analogs disrupts fatty acid metabolism in male mice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 291:118202. [PMID: 34562693 DOI: 10.1016/j.envpol.2021.118202] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 09/15/2021] [Accepted: 09/17/2021] [Indexed: 05/28/2023]
Abstract
Perfluoroalkyl ether carboxylic acids (PFECAs), including hexafluoropropylene oxide dimer acid (HFPO-DA, GenX), have been widely used as alternatives to perfluorooctanoic acid (PFOA) and subsequently detected in various environmental matrices. Despite this, public information regarding their hepatotoxicity remains limited. Here, to compare the hepatotoxicity of PFECAs and identify better alternatives for GenX, adult male mice were exposed to different concentrations (0.4, 2, and 10 mg/kg/d) of PFOA, GenX, and its analogs (PFMO2HpA and PFMO3NA) for 28 d. Results demonstrated increased hepatomegaly and disturbed fatty acid metabolism with increasing treatment doses. After dimensionality reduction analysis, significant differences were observed in the relative liver weights and liver and serum biochemical parameters among the four clusters. Furthermore, when chemical concentrations in the liver were similar, no differences in the indicators of liver injury associated with fatty acid metabolism were observed among groups in the same clusters. Our results suggest that dimensionality reduction analysis is a useful strategy for analyzing samples exposed to multiple compounds at different doses. Furthermore, PFECAs exhibit similar hepatotoxicities at the same cumulative hepatic concentration in mice with constant body weight, while PFMO2HpA exhibits lower hepatotoxicity compared to GenX at the same dose.
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Affiliation(s)
- Hua Guo
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China; Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Nan Sheng
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China
| | - Yong Guo
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Chengying Wu
- Sanming Hexafluo Chemicals Co., Ltd., Fluorinated New Material Industry Park, Mingxi, Fujian, 365200, China
| | - Weidong Xie
- Sanming Hexafluo Chemicals Co., Ltd., Fluorinated New Material Industry Park, Mingxi, Fujian, 365200, China
| | - Jiayin Dai
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, China; Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
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13
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Campos B, Piña B, Barata C. Daphnia magna Gut-Specific Transcriptomic Responses to Feeding Inhibiting Chemicals and Food Limitation. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:2510-2520. [PMID: 34081794 DOI: 10.1002/etc.5134] [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: 02/24/2021] [Revised: 03/31/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
Transcriptomic responses combined with apical adverse ecologically relevant outcomes have proven to be useful to unravel and anchor molecular mechanisms of action to adverse outcomes. This is the case for feeding inhibition responses in the model ecotoxicological species Daphnia magna. The aim of the present study was to assess the transcriptomic responses in guts dissected from D. magna individuals exposed to concentrations of selected compounds that inhibit feeding and compare them with the responses associated to 2 levels of food restriction (low food and starvation). Chemical treatments included cadmium, copper, fluoranthene, λ-cyhalothrin, and the cyanotoxin anatoxin-a. Although the initial hypothesis was that exposure to chemical feeding inhibitors should elicit similar molecular responses as food limitation, the corresponding gut transcriptomic responses differed significantly. In moderate food limitation conditions, D. magna individuals increased protein and carbohydrate catabolism, likely to be used as energetic sources, whereas under severe starving conditions most metabolism-related pathways appeared down-regulated. Treatment with chemical feeding inhibitors promoted cell turnover-related signaling pathways in the gut, probably to renew tissue damage caused by the reported oxidative stress effects of these compounds, and inhibited the transcription of gut digestive gene enzymes and energetic metabolic pathways. We conclude that chemical feeding inhibitors, rather than mimicking the physiological response to low- or no-food conditions, cause specific toxic effects, preventing Daphnia both from feeding and from adjusting its metabolism to the resulting low energy intake. Environ Toxicol Chem 2021;40:2510-2520. © 2021 SETAC.
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Affiliation(s)
- Bruno Campos
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, Barcelona, Spain
| | - Benjamín Piña
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, Barcelona, Spain
| | - Carlos Barata
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, Barcelona, Spain
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14
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Zhao X, Yang Z, Cheng Y. Effects of cadmium alone and in combination with pH on bioaccumulation, tissue structure, and enzyme activity of the Chinese mitten crab, Eriocheir sinensis. Comp Biochem Physiol C Toxicol Pharmacol 2021; 245:109025. [PMID: 33737221 DOI: 10.1016/j.cbpc.2021.109025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/14/2021] [Accepted: 02/16/2021] [Indexed: 11/25/2022]
Abstract
In this study, Chinese mitten crabs (Eriocheir sinensis) were exposed to various combinations of reduced pH (7.8, 7.3, and 6.5) and cadmium (Cd; 0 and 1 mg·L-1) for 7, 14, and 21 days. The reduced pH and 1 mg·L-1 Cd treatment significantly decreased the Cd concentration in crab tissues in the order of pH 7.8 > pH 7.3 > pH 6.5. The exposure to Cd resulted in edema, tubular vacuolization in epithelial cells, and hepatic duct degeneration in the hepatopancreas and indistinct cellular structure and disconnected epithelial layer in the gills. However, low pH alleviated the toxic effects of Cd on the tissues. In gill and hepatopancreas tissues, low pH and Cd exposure caused a significant increase in superoxide dismutase and catalase activities and oxidized glutathione content, but metallothionein activity was not affected. In contrast, the activity of glutathione-S-transferase decreased. Thus, indirect effects of pH on metal accumulation and antagonistic toxicities were observed in E. sinensis, and reduced pH and Cd exposure modulated the oxidative balance via different mechanisms.
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Affiliation(s)
- Xuejian Zhao
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on Environmental Ecology and Fish Nutrition (CREEFN) of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
| | - Zhigang Yang
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on Environmental Ecology and Fish Nutrition (CREEFN) of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China.
| | - Yongxu Cheng
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on Environmental Ecology and Fish Nutrition (CREEFN) of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China.
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15
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Jeremias G, Jesus F, Ventura SPM, Gonçalves FJM, Asselman J, Pereira JL. New insights on the effects of ionic liquid structural changes at the gene expression level: Molecular mechanisms of toxicity in Daphnia magna. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124517. [PMID: 33199138 DOI: 10.1016/j.jhazmat.2020.124517] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/18/2020] [Accepted: 11/05/2020] [Indexed: 06/11/2023]
Abstract
Knowledge on the molecular basis of ionic liquids' (ILs) ecotoxicity is critical for the development of these designer solvents as their structure can be engineered to simultaneously meet functionality performance and environmental safety. The molecular effects of ILs were investigated by using RNA-sequencing following Daphnia magna exposure to imidazolium- and cholinium-based ILs: 1-ethyl-3-methylimidazolium chloride ([C2mim]Cl), 1-dodecyl-3-methylimidazolium chloride ([C12mim]Cl) and cholinium chloride ([Chol]Cl)-; the selection allowing to compare different families and cation alkyl chains. ILs shared mechanisms of toxicity focusing e.g. cellular membrane and cytoskeleton, oxidative stress, energy production, protein biosynthesis, DNA damage, disease initiation. [C2mim]Cl and [C12mim]Cl were the least and the most toxic ILs at the transcriptional level, denoting the role of the alkyl chain as a driver of ILs toxicity. Also, it was reinforced that [Chol]Cl is not devoid of environmental hazardous potential regardless of its argued biological compatibility. Unique gene expression signatures could also be identified for each IL, enlightening specific mechanisms of toxicity.
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Affiliation(s)
- Guilherme Jeremias
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal
| | - Fátima Jesus
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal
| | - Sónia P M Ventura
- Department of Chemistry & CICECO - Aveiro Institute of Materials, University of Aveiro, Portugal
| | - Fernando J M Gonçalves
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal
| | - Jana Asselman
- Blue Growth Research Lab, Ghent University, Bluebridge Building, Ostend Science Park 1, 8400 Ostend, Belgium
| | - Joana L Pereira
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal.
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16
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Religia P, Nguyen ND, Nong QD, Matsuura T, Kato Y, Watanabe H. Mutation of the Cytochrome P450 CYP360A8 Gene Increases Sensitivity to Paraquat in Daphnia magna. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:1279-1288. [PMID: 33338286 DOI: 10.1002/etc.4970] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/24/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
The freshwater crustacean Daphnia magna has traditionally been a model for ecotoxicological studies owing to its sensitivity to many xenobiotics. Because it is used in many toxicity assessments, its detoxification mechanism for xenobiotics is important and requires further study. However, studies related to detoxification genes are limited to transcriptomic profiling, and there are no D. magna mutants for use in the understanding of xenobiotic metabolism in vivo. We report the generation of a D. magna CYP360A8 mutant-the gene is a cytochrome P450 (CYP) clan 3 gene. Based on RNA sequencing of adult D. magna, we found that CYP360A8 has the highest expression level among all CYP genes. At ovarian maturation, its expression level is up-regulated 6-fold compared to the juvenile stages and is maintained thereafter. Using the CRISPR/CRISPR-associated 9 (Cas9) system, we disrupted CYP360A8 by coinjecting CYP360A8-targeting guide RNA and Cas9 proteins into D. magna eggs and established one monoallelic CYP360A8 mutant line. This CYP360A8 mutant had a higher sensitivity to the herbicide paraquat compared to the wild type. We confirmed the up-regulation of CYP360A8 by paraquat. The results demonstrate the role of CYP360A8 in paraquat detoxification. The present study establishes a CYP mutant of D. magna, and this strategy can be a basic platform to document a range of CYP gene-xenobiotic relationships in this species. Environ Toxicol Chem 2021;40:1279-1288. © 2020 SETAC.
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Affiliation(s)
- Pijar Religia
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
| | - Nhan Duc Nguyen
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
| | - Quang Dang Nong
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
| | - Tomoaki Matsuura
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
| | - Yasuhiko Kato
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
| | - Hajime Watanabe
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
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17
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Bojadzija Savic G, Colinet H, Bormans M, Edwards C, Lawton LA, Briand E, Wiegand C. Cell free Microcystis aeruginosa spent medium affects Daphnia magna survival and stress response. Toxicon 2021; 195:37-47. [PMID: 33716069 DOI: 10.1016/j.toxicon.2021.03.009] [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: 11/17/2020] [Revised: 02/19/2021] [Accepted: 03/08/2021] [Indexed: 12/01/2022]
Abstract
Primary consumers in freshwater ecosystems, such as the zooplankton organism Daphnia magna, are highly affected by cyanobacteria, both as they may use it as a food source but also by cyanobacterial metabolites present in the water. Here, we investigate the impacts of cyanobacterial metabolites focussing on the environmental realistic scenario of the naturally released mixture without crushing cyanobacterial cells or their uptake as food. Therefore, D. magna were exposed to two concentrations of cell free cyanobacterial spent medium from Microcystis aeruginosa PCC 7806 to represent higher and lower ecologically-relevant concentrations of cyanobacterial metabolites. Including microcystin-LR, 11 metabolites have been detected of which 5 were quantified. Hypothesising concentration and time dependent negative impact, survival, gene expression marking digestion and metabolism, oxidative stress response, cell cycle and molting as well as activities of detoxification and antioxidant enzymes were followed for 7 days. D. magna suffered from oxidative stress as both catalase and glutathione S-transferase enzyme activities significantly decreased, suggesting enzyme exhaustibility after 3 and 7 days. Moreover, gene-expressions of the 4 stress markers (glutathione S-transferase, glutathione peroxidase, catalase and thioredoxin) were merely downregulated after 7 days of exposure. Energy allocation (expression of glyceraldehyde-3-phosphate dehydrogenase) was increased after 3 days but decreased as well after 7 days exposure. Cell cycle was impacted time dependently but differently by the two concentrations, along with an increasing downregulation of myosin heavy chain responsible for cell arrangement and muscular movements. Deregulation of nuclear hormone receptor genes indicate that D. magna hormonal steering including molting seemed impaired despite no detection of microviridin J in the extracts. As a consequence of all those responses and presumably of more than investigated molecular and physiological changes, D. magna survival was impaired over time, in a concentration dependent manner. Our results confirm that besides microcystin-LR, other secondary metabolites contribute to negative impact on D. magna survival and stress response.
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Affiliation(s)
| | - Hervé Colinet
- UMR ECOBIO, 6553 CNRS, Université de Rennes 1, Campus de Beaulieu, Rennes, France.
| | - Myriam Bormans
- UMR ECOBIO, 6553 CNRS, Université de Rennes 1, Campus de Beaulieu, Rennes, France.
| | - Christine Edwards
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, AB10 7GJ, United Kingdom.
| | - Linda A Lawton
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, AB10 7GJ, United Kingdom.
| | - Enora Briand
- IFREMER, Phycotoxins Laboratory, F-44311, Nantes, France.
| | - Claudia Wiegand
- UMR ECOBIO, 6553 CNRS, Université de Rennes 1, Campus de Beaulieu, Rennes, France.
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18
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Dong A, Huo J, Yan J, Dong A, Liu B. Lipid peroxidation of kidney of the turtle Mauremys reevesii caused by cadmium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:6811-6817. [PMID: 33011946 DOI: 10.1007/s11356-020-11054-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
This research was designed to investigate lipid peroxidation of the kidney of turtle (Mauremys reevesii) caused by cadmium. Turtles were injected intraperitoneally with cadmium at the concentration of 0 (control), 7.5, 15, and 30 mg/kg, and 5 turtles were taken from each group after exposure for 1 week (1 w), 2 weeks (2 w), and 3 weeks (3 w). Superoxide dismutase (SOD) and catalase (CAT) activities as well as glutathione (GSH) and malonyldialdehyde (MDA) contents in the homogenate of kidney tissue were analyzed. The results demonstrated that a short time of low dose of cadmium could stimulate the increase of SOD activity in the kidney of turtles, but a long time of high dose of cadmium could induce the decrease of SOD activity in the kidney of turtles. Cadmium could decrease CAT activity and GSH content in turtle kidney, but increased MDA content in turtle kidney. There were some other effects on the turtles, such as depression and diarrhea. The experimental results indicate that cadmium causes temporary oxidative stress on the kidney of turtles.
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Affiliation(s)
- Aiguo Dong
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Junfeng Huo
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China.
| | - Juanjuan Yan
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Ailing Dong
- Bureau of agriculture and rural affairs of Qianan, Tangshan, Hebei Province, China
| | - Biwang Liu
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
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19
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Tams V, Nickel JH, Ehring A, Cordellier M. Insights into the genetic basis of predator-induced response in Daphnia galeata. Ecol Evol 2020; 10:13095-13108. [PMID: 33304520 PMCID: PMC7713943 DOI: 10.1002/ece3.6899] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 09/09/2020] [Accepted: 09/17/2020] [Indexed: 01/12/2023] Open
Abstract
Phenotypic plastic responses allow organisms to rapidly adjust when facing environmental challenges-these responses comprise morphological, behavioral but also life-history changes. Alteration of life-history traits when exposed to predation risk have been reported often in the ecological and genomic model organism Daphnia. However, the molecular basis of this response is not well understood, especially in the context of fish predation. Here, we characterized the transcriptional profiles of two Daphnia galeata clonal lines with opposed life histories when exposed to fish kairomones. First, we conducted a differential gene expression, identifying a total of 125 candidate transcripts involved in the predator-induced response, uncovering substantial intraspecific variation. Second, we applied a gene coexpression network analysis to find clusters of tightly linked transcripts revealing the functional relations of transcripts underlying the predator-induced response. Our results showed that transcripts involved in remodeling of the cuticle, growth, and digestion correlated with the response to environmental change in D. galeata. Furthermore, we used an orthology-based approach to gain functional information for transcripts lacking gene ontology (GO) information, as well as insights into the evolutionary conservation of transcripts. We could show that our candidate transcripts have orthologs in other Daphnia species but almost none in other arthropods. The unique combination of methods allowed us to identify candidate transcripts, their putative functions, and evolutionary history associated with predator-induced responses in Daphnia. Our study opens up to the question as to whether the same molecular signature is associated with fish kairomones-mediated life-history changes in other Daphnia species.
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Affiliation(s)
- Verena Tams
- Institute of Marine Ecosystem and Fishery ScienceUniversität HamburgHamburgGermany
| | | | - Anne Ehring
- Institute of ZoologyUniversität HamburgHamburgGermany
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20
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Schwarzenberger A, Kurmayer R, Martin-Creuzburg D. Toward Disentangling the Multiple Nutritional Constraints Imposed by Planktothrix: The Significance of Harmful Secondary Metabolites and Sterol Limitation. Front Microbiol 2020; 11:586120. [PMID: 33193235 PMCID: PMC7609654 DOI: 10.3389/fmicb.2020.586120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/15/2020] [Indexed: 11/13/2022] Open
Abstract
The harmful bloom-forming cyanobacterium Planktothrix is commonly considered to be nutritionally inadequate for zooplankton grazers, resulting in limited top-down control. However, interactions between Planktothrix and zooplankton grazers are poorly understood. The food quality of Planktothrix is potentially constrained by morphological properties (i.e., filament formation), the production of harmful secondary metabolites, and a deficiency in essential lipids (i.e., primarily sterols). Here, we investigated the relative significance of toxin production (microcystins, carboxypeptidase A inhibitors, protease inhibitors) and sterol limitation for the performance of Daphnia feeding on one Planktothrix rubescens and one P. agardhii wild-type/microcystin knock-out mutant pair. Our data suggest that the poor food quality of both Planktothrix spp. is due to deleterious effects mediated by various harmful secondary metabolites and that the impact of sterol limitation is partially or completely superimposed by toxicity. The significance of the different factors seems to depend on the metabolite profile of the considered Planktothrix strain and the Daphnia clone that is used for the experiments. The toxin-responsive gene expression (transporter genes, gpx, and trypsin) and enzyme activity patterns revealed strain-specific food quality constraints and that Daphnia is capable of modulating its physiological responses according to the ingested Planktothrix strain. Future studies need to consider that Planktothrix-grazer interactions are simultaneously modulated by multiple factors to improve our understanding of top-down influences on Planktothrix bloom formation.
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Affiliation(s)
| | - Rainer Kurmayer
- Research Department for Limnology, University of Innsbruck, Innsbruck, Austria
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Huo J, Dong A, Yan J, Dong A. Effects of cadmium on the activities of ALT and AST as well as the content of TP in plasma of freshwater turtle Mauremys reevesii. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:18025-18028. [PMID: 32170612 DOI: 10.1007/s11356-020-08338-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 03/05/2020] [Indexed: 06/10/2023]
Abstract
Cadmium (Cd) is one of the toxic metals in the aquatic environment. This study was designed to examine the effects of Cd on the activities of ALT and AST and the concentrations of TP in plasma of freshwater turtle Mauremys reevesii. Experiment turtles were exposed to Cd at the concentration of 15 mg/kg by intraperitoneal injection. The activities of ALT and AST and the concentrations of TP were investigated. Compared with the controls, the activities of ALT and AST in plasma of the treated turtles significantly increased. The concentrations of TP were comparable between the treated turtles and the controls except that were higher than the control turtles in 14 days (14 d) and 56 days (56 d). As a result that turtles exposed to Cd were led to liver function damage.
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Affiliation(s)
- Junfeng Huo
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Aiguo Dong
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China.
| | - Juanjuan Yan
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Ailing Dong
- Bureau of Agriculture and Rural Affairs of Qianan, Tangshan, Hebei Province, China
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22
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Huo J, Dong A, Yan J, Dong A. Effects of cadmium on the gene transcription of the liver in the freshwater turtle (Chinemys reevesii). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:8431-8438. [PMID: 31902076 DOI: 10.1007/s11356-019-07432-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 12/17/2019] [Indexed: 06/10/2023]
Abstract
This study investigated the related gene transcription of liver in freshwater turtle Chinemys reevesii exposed to cadmium (Cd). After acclimation, healthy turtles were selected for experiments. They were randomly divided into four experimental groups and each group had 5 animals. The turtles were treated with 0 mg/kg, 7.5 mg/kg, 15 mg/kg, and 30 mg/kg Cd chloride separately by intraperitoneal injection. Liver samples were collected for examination of the transcription of related genes at 2 weeks after Cd exposure. The transcription of mRNA of MT, SOD, CAT, PNKP, and GPX4 genes in turtle liver cells were analyzed. Results showed that Cd promoted MT mRNA transcription in turtle's liver at low dose (7.5 mg/kg) and inhibited MT mRNA transcription in turtle's liver at middle dose (15 mg/kg) and high dose (30 mg/kg). Cd inhibited the transcription of SOD, CAT, and PNKP mRNA in turtle's liver, and the inhibition was obvious at high dose (30 mg/kg). Cd promoted GPX4 mRNA transcription in turtle's liver, especially at low dose (7.5 mg/kg). In conclusion, Cd had different effects on the mRNA transcription of liver cells in the freshwater turtle Chinemys reevesii exposed to Cd.
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Affiliation(s)
- Junfeng Huo
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Aiguo Dong
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China.
| | - Juanjuan Yan
- Shanxi Key Laboratory of Chinese Medicine Encephalopathy, Shanxi University of Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Ailing Dong
- Qianan Agriculture Animal Husbandry and Fishery Bureau, Tangshan, Hebei Province, China
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23
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Brun NR, Fields PD, Horsfield S, Mirbahai L, Ebert D, Colbourne JK, Fent K. Mixtures of Aluminum and Indium Induce More than Additive Phenotypic and Toxicogenomic Responses in Daphnia magna. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:1639-1649. [PMID: 30608651 DOI: 10.1021/acs.est.8b05457] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Aquatic systems are contaminated by many metals but their effects as mixtures on organisms are not well understood. Here, we assessed effects of aluminum with fairly well-known modes of actions and indium, an understudied emerging contaminant from electronics, followed by studying equi-effective mixtures thereof. We report acute and adverse phenotypic effects in Daphnia magna adults and global transcriptomic effects employing RNA sequencing in neonates. The mixture induced more than additive activity in mortality and in physiological effects, including growth and reproduction. Similarly, transcriptomic effects were more than additive, as indicated by a markedly higher number of 463 differentially expressed transcripts in the mixture and by distinct classes of genes assigned to several biological functions, including metabolic processes, suggesting depleted energy reserves, which may be responsible for the observed impaired reproduction and growth. A gene set enrichment analysis (GSEA) of a priori known response pathways for aluminum confirmed activation of distinct molecular pathways by indium. Our study is highlighting more than additive effects at the transcriptional and physiological level and is providing a state-of-the art approach to mixture analysis, which is important for risk assessment of these metals and metal mixtures.
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Affiliation(s)
- Nadja R Brun
- School of Life Sciences , University of Applied Sciences and Arts Northwestern Switzerland , Langackerstrasse 30 , 4132 Muttenz , Switzerland
- Institute of Biogeochemistry and Pollutant Dynamics , ETH Zürich , Universitätsstrasse 16 , 8092 Zürich , Switzerland
| | - Peter D Fields
- Zoological Institute , University of Basel , Vesalgasse 1 , 4051 Basel , Switzerland
| | - Samuel Horsfield
- School of Biosciences , University of Birmingham , Edgbaston, Birmingham B15 2TT , United Kingdom
| | - Leda Mirbahai
- School of Biosciences , University of Birmingham , Edgbaston, Birmingham B15 2TT , United Kingdom
| | - Dieter Ebert
- Zoological Institute , University of Basel , Vesalgasse 1 , 4051 Basel , Switzerland
| | - John K Colbourne
- School of Biosciences , University of Birmingham , Edgbaston, Birmingham B15 2TT , United Kingdom
| | - Karl Fent
- School of Life Sciences , University of Applied Sciences and Arts Northwestern Switzerland , Langackerstrasse 30 , 4132 Muttenz , Switzerland
- Institute of Biogeochemistry and Pollutant Dynamics , ETH Zürich , Universitätsstrasse 16 , 8092 Zürich , Switzerland
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Wang H, Zhang R, Song Y, Li T, Ge M. Protective Effect of Ganoderma Triterpenoids on Cadmium-Induced Testicular Toxicity in Chickens. Biol Trace Elem Res 2019; 187:281-290. [PMID: 29717433 DOI: 10.1007/s12011-018-1364-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/24/2018] [Indexed: 01/15/2023]
Abstract
Studies have shown that cadmium can cause chicken testicular damage, but a protective effect of Ganoderma triterpenoids on cadmium-induced testicular damage in chickens has not yet been reported. The present study was designed to research the protective effect of Ganoderma triterpenoids on cadmium-induced testicular damage in chicken. Eighty healthy 7-day-old Hyline egg laying chickens were randomly divided into four groups with 20 in each group. The control group was fed with normal full-fodder, the model group was fed with normal full-fodder with 140 mg/kg of CdCl2, the Ganoderma triterpenoid treatment group was fed with a full-fodder diet containing 140 mg/kg of CdCl2 and 0.5 mL of Ganoderma triterpenoid solution (20 mg/mL), and the Ganoderma triterpenoid group was fed normal full-fodder and 0.5 mL of Ganoderma triterpenoid solution (20 mg/mL) gavage. The chickens were euthanized at 20, 40, and 60 days, respectively, and the testes were harvested. The changes of cadmium contents, the antioxidant enzymes (superoxide dismutase (SOD), glutathione peroxidase (GSH-Px)), peroxide (malondialdehyde (MDA)), inflammatory factors (interleukin (IL)-1β, IL-6, and tumor necrosis factor alpha (TNF-α)), and apoptosis-related proteins (Bax, Bcl-2, and Caspase-3) were detected. The pathological sections of the testes were made at the same time. The results suggested that Ganoderma triterpenoids could reduce the accumulation of cadmium in testis tissue; reduce the content of IL-1β, IL-6, and TNF-α in cadmium poisoning testis; significantly increase the activity of SOD and GSH-Px; decrease the content of MDA; regulate the expression of Bax, Caspase-3, and Bcl-2; and reduce the damage of testicular tissue. The results showed that Ganoderma triterpenoids have a protective effect on cadmium-induced testicular injury in chicken.
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Affiliation(s)
- Hongmei Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, China
| | - Ruili Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, China
| | - Yangyang Song
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, China
| | - Tianqi Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, China
| | - Ming Ge
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, China.
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25
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Song Y, Asselman J, De Schamphelaere KAC, Salbu B, Tollefsen KE. Deciphering the Combined Effects of Environmental Stressors on Gene Transcription: A Conceptual Approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:5479-5489. [PMID: 29641900 DOI: 10.1021/acs.est.8b00749] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The use of classical mixture toxicity models to predict the combined effects of environmental stressors based on toxicogenomics (OMICS) data is still in its infancy. Although several studies have made attempts to implement mixture modeling in OMICS analysis to understand the low-dose interactions of stressors, it is not clear how interactions occur at the molecular level and how results generated from such approaches can be better used to inform future studies and cumulative hazard assessment of multiple stressors. The present work was therefore conducted to propose a conceptual approach for combined effect assessment using global gene expression data, as illustrated by a case study on assessment of combined effects of gamma radiation and depleted uranium (DU) on Atlantic salmon ( Salmo salar). Implementation of the independent action (IA) model in reanalysis of a previously published microarray gene expression dataset was performed to describe gene expression patterns of combined effects and identify key gene sets and pathways that were relevant for understanding the interactive effects of these stressors. By using this approach, 3120 differentially expressed genes (DEGs) were found to display additive effects, whereas 279 (273 synergistic, 6 antagonistic) were found to deviate from additivity. Functional analysis further revealed that multiple toxicity pathways, such as oxidative stress responses, cell cycle regulation, lipid metabolism, and immune responses were enriched by DEGs showing synergistic gene expression. A key toxicity pathway of DNA damage leading to enhanced tumorigenesis signaling is highlighted and discussed in detail as an example of how to take advantage of the approach. Furthermore, a conceptual workflow describing the integration of combined effect modeling, OMICS analysis, and bioinformatics is proposed. The present study presents a conceptual framework for utilizing OMICS data in combined effect assessment and may provide novel strategies for dealing with data analysis and interpretation of molecular responses of multiple stressors.
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Affiliation(s)
- You Song
- Section of Ecotoxicology and Risk Assessment , Norwegian Institute for Water Research (NIVA) , Gaustadalléen 21 , N-0349 Oslo , Norway
- Centre for Environmental Radioactivity (CERAD) , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Ås , Norway
| | - Jana Asselman
- Faculty of Bioscience Engineering, Laboratory of Environmental Toxicology and Aquatic Ecology (GhEnToxLab) , Ghent University , Campus Coupure Building F, Second Floor, Coupure Links 653 , B9000 Ghent , Belgium
| | - Karel A C De Schamphelaere
- Faculty of Bioscience Engineering, Laboratory of Environmental Toxicology and Aquatic Ecology (GhEnToxLab) , Ghent University , Campus Coupure Building F, Second Floor, Coupure Links 653 , B9000 Ghent , Belgium
| | - Brit Salbu
- Centre for Environmental Radioactivity (CERAD) , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Ås , Norway
| | - Knut Erik Tollefsen
- Section of Ecotoxicology and Risk Assessment , Norwegian Institute for Water Research (NIVA) , Gaustadalléen 21 , N-0349 Oslo , Norway
- Centre for Environmental Radioactivity (CERAD) , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Ås , Norway
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26
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Huo J, Dong A, Niu X, Dong A, Lee S, Ma C, Wang L. Effects of cadmium on oxidative stress activities in plasma of freshwater turtle Chinemys reevesii. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:8027-8034. [PMID: 29305804 DOI: 10.1007/s11356-017-1139-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 12/26/2017] [Indexed: 05/24/2023]
Abstract
Cadmium (Cd) has been recently found in high concentrations in the aquatic environment. This study was designed to examine the effects of Cd on the oxidative stress activities in plasma of freshwater turtle Chinemys reevesii. Experimental turtles were exposed to Cd at the concentration of 15 mg/kg by intraperitoneal injection, and redox status was investigated. Compared to the controls, superoxide dismutase (SOD) and catalase activities in plasma of the treated animals significantly decreased in week 1, week 2, and week 4. However, SOD activities gradually increased from week 4 to week 8. The treated animals had higher content of MDA and lower content of GSH in plasma over the observation period. In conclusion, our results showed that Cd decreased the antioxidant capacity and increased the level of oxidative damage product in plasma, which suggest that Cd causes oxidative stress and damage in the animal under the experimental conditions.
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Affiliation(s)
- Junfeng Huo
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, China
- The Key Research Laboratory of Benefiting Qi for Acting Blood Circulation Method to Treat Multiple Sclerosis of State Administration of Traditional Chinese Medicine, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Aiguo Dong
- The Key Research Laboratory of Benefiting Qi for Acting Blood Circulation Method to Treat Multiple Sclerosis of State Administration of Traditional Chinese Medicine, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi Province, China.
| | - Xiaojun Niu
- The Key Research Laboratory of Benefiting Qi for Acting Blood Circulation Method to Treat Multiple Sclerosis of State Administration of Traditional Chinese Medicine, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Ailing Dong
- QianAn agriculture Animal Husbandry and Fishery Bureau, Tangshan, Hebei Province, China
| | - Shaochin Lee
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, China.
| | - Cungen Ma
- Institute of Brain Science, Shanxi Datong University, Datong, Shanxi Province, China.
| | - Lan Wang
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, China.
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27
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Kim HY, Asselman J, Jeong TY, Yu S, De Schamphelaere KAC, Kim SD. Multigenerational Effects of the Antibiotic Tetracycline on Transcriptional Responses of Daphnia magna and Its Relationship to Higher Levels of Biological Organizations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:12898-12907. [PMID: 29023098 DOI: 10.1021/acs.est.7b05050] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Given the risk of environmental pollution by pharmaceutical compounds and the effects of these compounds on exposed ecosystems, ecologically relevant and realistic assessments are required. However, many studies have been mostly focused on individual responses in a single generation exposed to one-effect concentrations. Here, transcriptional responses of the crustacean Daphnia magna to the antibiotic tetracycline across multiple generations and effect concentrations were investigated. The results demonstrated that tetracycline induced different transcriptional responses of daphnids that were dependent on dose and generation. For example, reproduction-related expressed sequence tags (ESTs), including vitellogenin, were distinctly related to the dose-dependent tetracycline exposure, whereas multigenerational exposure induced significant change of molting-related ESTs such as cuticle protein. A total of 65 ESTs were shared in all contrasts, suggesting a conserved mechanism of tetracycline toxicity regardless of exposure concentration or time. Most of them were associated with general stress responses including translation, protein and carbohydrate metabolism, and oxidative phosphorylation. In addition, effects across the dose-response curve showed higher correlative connections among transcriptional, physiological, and individual responses than multigenerational effects. In the multigenerational exposure, the connectivity between adjacent generations decreased with increasing generation number. The results clearly highlight that exposure concentration and time trigger different mechanisms and functions, providing further evidence that multigenerational and dose-response effects cannot be neglected in environmental risk assessment.
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Affiliation(s)
- Hyun Young Kim
- Research and Development Division, Korea Institute of Nuclear Nonproliferation and Control (KINAC) , 1534 Yuseong-daero, Yuseong-gu, Daejeon, 34054 Republic of Korea
| | - Jana Asselman
- Laboratory of Environmental Toxicology and Aquatic Ecology (GhEnToxLab), Ghent University , Ghent, B-9000 Belgium
| | - Tae-Yong Jeong
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) , 123 Cheomdan-gwagiro, Buk-gu, Gwangju, 61005 Republic of Korea
| | - Seungho Yu
- Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute , Jeongeup-Si, Jeollabuk-Do, 56212 Republic of Korea
| | - Karel A C De Schamphelaere
- Laboratory of Environmental Toxicology and Aquatic Ecology (GhEnToxLab), Ghent University , Ghent, B-9000 Belgium
| | - Sang Don Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) , 123 Cheomdan-gwagiro, Buk-gu, Gwangju, 61005 Republic of Korea
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28
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Huo J, Dong A, Wang Y, Lee S, Ma C, Wang L. Cadmium induces histopathological injuries and ultrastructural changes in the liver of freshwater turtle (Chinemys reevesii). CHEMOSPHERE 2017; 186:459-465. [PMID: 28806674 DOI: 10.1016/j.chemosphere.2017.08.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/31/2017] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
The study investigated the histopathological and ultrastructural lesions of liver of freshwater turtle Chinemys reevesii exposed to Cadmium (Cd). The animals were exposed to 0 mg kg-1 (0.85% normal saline (NS)), 7.5 mg kg-1, 15 mg kg-1, 30 mg kg-1 Cd chloride separately by intraperitoneal injection. Liver samples were collected for examination of lesions under light and electronic microscopes. Results showed that liver tissues from Cd -treated animals presented various degrees of histopathological lesions. Liver cells showed swollen, degeneration and necrosis with dose-dependent manner. Under electronic microscope, nucleus, mitochondria and rough endoplasmic reticulum presented various degrees of lesions with dose-dependent manner. In conclusion, Cd has significant toxicity on liver tissue of the freshwater turtle, which occurs in a dose-dependent manner.
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Affiliation(s)
- Junfeng Huo
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, China; 2011 Collaborative Innovation Center/Research Center of Neurobiology, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Aiguo Dong
- 2011 Collaborative Innovation Center/Research Center of Neurobiology, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Yonghui Wang
- 2011 Collaborative Innovation Center/Research Center of Neurobiology, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi Province, China
| | - Shaochin Lee
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, China
| | - Cungen Ma
- 2011 Collaborative Innovation Center/Research Center of Neurobiology, Shanxi University of Traditional Chinese Medicine, Taiyuan, Shanxi Province, China; Institute of Brain Science, Shanxi Datong University, Datong, Shanxi Province, China
| | - Lan Wang
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, China.
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29
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Van Regenmortel T, Berteloot O, Janssen CR, De Schamphelaere KAC. Analyzing the capacity of the Daphnia magna and Pseudokirchneriella subcapitata bioavailability models to predict chronic zinc toxicity at high pH and low calcium concentrations and formulation of a generalized bioavailability model for D. magna. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:2781-2798. [PMID: 28452073 DOI: 10.1002/etc.3840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 02/03/2017] [Accepted: 04/24/2017] [Indexed: 06/07/2023]
Abstract
Risk assessment in the European Union implements Zn bioavailability models to derive predicted-no-effect concentrations for Zn. These models are validated within certain boundaries (i.e., pH ≤ 8 and Ca concentrations ≥ 5mg/L), but a substantial fraction of the European surface waters falls outside these boundaries. Therefore, we evaluated whether the chronic Zn biotic ligand model (BLM) for Daphnia magna and the chronic bioavailability model for Pseudokirchneriella subcapitata could be extrapolated to pH > 8 and Ca concentrations < 5 mg/L. Results from D. magna experiments suggested that the BLM is not able to reflect the pH effect over a broad pH range (5.5-8.5). In addition, because of Ca deficiency of D. magna in the soft water tests, we cannot conclude whether the BLM is applicable below its Ca boundary. Results for P. subcapitata experiments showed that the bioavailability model can accurately predict Zn toxicity for Ca concentrations down to 0.8 mg/L and pH values up to 8.5. Because the chronic Zn BLM for D. magna could not be extrapolated beyond its validity boundaries for pH, a generalized bioavailability model (gBAM) was developed. Of 4 gBAMs developed, we recommend the use of gBAM-D, which combines a log-linear relation between the 21-d median effective concentrations (expressed as free Zn2+ ion activity) and pH, with more conventional BLM-type competition constants for Na, Ca, and Mg. This model is a first step in further improving the accuracy of chronic toxicity predictions of Zn as a function of water chemistry, which can decrease the uncertainty in implementing the bioavailability-based predicted-no-effect concentration in the risk assessment of high-pH and low-Ca concentration regions in Europe. Environ Toxicol Chem 2017;36:2781-2798. © 2017 SETAC.
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Affiliation(s)
- Tina Van Regenmortel
- Faculty of Bioscience Engineering, Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, Ghent, Belgium
| | - Olivier Berteloot
- Faculty of Bioscience Engineering, Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, Ghent, Belgium
| | - Colin R Janssen
- Faculty of Bioscience Engineering, Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, Ghent, Belgium
| | - Karel A C De Schamphelaere
- Faculty of Bioscience Engineering, Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, Ghent, Belgium
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30
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Spanier KI, Jansen M, Decaestecker E, Hulselmans G, Becker D, Colbourne JK, Orsini L, De Meester L, Aerts S. Conserved Transcription Factors Steer Growth-Related Genomic Programs in Daphnia. Genome Biol Evol 2017; 9:1821-1842. [PMID: 28854641 PMCID: PMC5569996 DOI: 10.1093/gbe/evx127] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/11/2017] [Indexed: 02/06/2023] Open
Abstract
Ecological genomics aims to understand the functional association between environmental gradients and the genes underlying adaptive traits. Many genes that are identified by genome-wide screening in ecologically relevant species lack functional annotations. Although gene functions can be inferred from sequence homology, such approaches have limited power. Here, we introduce ecological regulatory genomics by presenting an ontology-free gene prioritization method. Specifically, our method combines transcriptome profiling with high-throughput cis-regulatory sequence analysis in the water fleas Daphnia pulex and Daphnia magna. It screens coexpressed genes for overrepresented DNA motifs that serve as transcription factor binding sites, thereby providing insight into conserved transcription factors and gene regulatory networks shaping the expression profile. We first validated our method, called Daphnia-cisTarget, on a D. pulex heat shock data set, which revealed a network driven by the heat shock factor. Next, we performed RNA-Seq in D. magna exposed to the cyanobacterium Microcystis aeruginosa. Daphnia-cisTarget identified coregulated gene networks that associate with the moulting cycle and potentially regulate life history changes in growth rate and age at maturity. These networks are predicted to be regulated by evolutionary conserved transcription factors such as the homologues of Drosophila Shavenbaby and Grainyhead, nuclear receptors, and a GATA family member. In conclusion, our approach allows prioritising candidate genes in Daphnia without bias towards prior knowledge about functional gene annotation and represents an important step towards exploring the molecular mechanisms of ecological responses in organisms with poorly annotated genomes.
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Affiliation(s)
- Katina I. Spanier
- Department of Biology, Laboratory of Aquatic Ecology, Evolution and Conservation, KU Leuven, Belgium
- Department of Human Genetics, Laboratory of Computational Biology, KU Leuven, Belgium
- VIB Center for Brain and Disease Research, KU Leuven, Belgium
| | - Mieke Jansen
- Department of Biology, Laboratory of Aquatic Ecology, Evolution and Conservation, KU Leuven, Belgium
| | - Ellen Decaestecker
- Department of Biology, Laboratory of Aquatic Biology, Science and Technology, KU Leuven Campus Kulak, Kortrjik, Belgium
| | - Gert Hulselmans
- Department of Human Genetics, Laboratory of Computational Biology, KU Leuven, Belgium
- VIB Center for Brain and Disease Research, KU Leuven, Belgium
| | - Dörthe Becker
- Environmental Genomics Group, School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, United Kingdom
- Department of Animal and Plant Sciences, University of Sheffield, Western Bank, United Kingdom
| | - John K. Colbourne
- Environmental Genomics Group, School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, United Kingdom
| | - Luisa Orsini
- Environmental Genomics Group, School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, United Kingdom
| | - Luc De Meester
- Department of Biology, Laboratory of Aquatic Ecology, Evolution and Conservation, KU Leuven, Belgium
| | - Stein Aerts
- Department of Human Genetics, Laboratory of Computational Biology, KU Leuven, Belgium
- VIB Center for Brain and Disease Research, KU Leuven, Belgium
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31
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Song Y, Salbu B, Teien HC, Evensen Ø, Lind OC, Rosseland BO, Tollefsen KE. Hepatic transcriptional responses in Atlantic salmon (Salmo salar) exposed to gamma radiation and depleted uranium singly and in combination. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 562:270-279. [PMID: 27100007 DOI: 10.1016/j.scitotenv.2016.03.222] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/24/2016] [Accepted: 03/28/2016] [Indexed: 06/05/2023]
Abstract
Radionuclides are a special group of substances posing both radiological and chemical hazards to organisms. As a preliminary approach to understand the combined effects of radionuclides, exposure studies were designed using gamma radiation (Gamma) and depleted uranium (DU) as stressors, representing a combination of radiological (radiation) and chemical (metal) exposure. Juvenile Atlantic salmon (Salmo salar) were exposed to 70mGy external Gamma dose delivered over the first 5h of a 48h period (14mGy/h), 0.25mg/L DU were exposed continuously for 48h and the combination of the two stressors (Combi). Water and tissue concentrations of U were determined to assess the exposure quality and DU bioaccumulation. Hepatic gene expression changes were determined using microarrays in combination with quantitative real-time reverse transcription polymerase chain reaction (qPCR). Effects at the higher physiological levels were determined as plasma glucose (general stress) and hepatic histological changes. The results show that bioaccumulation of DU was observed after both single DU and the combined exposure. Global transcriptional analysis showed that 3122, 2303 and 3460 differentially expressed genes (DEGs) were significantly regulated by exposure to gamma, DU and Combi, respectively. Among these, 349 genes were commonly regulated by all treatments, while the majority was found to be treatment-specific. Functional analysis of DEGs revealed that the stressors displayed similar mode of action (MoA) across treatments such as induction of oxidative stress, DNA damage and disturbance of oxidative phosphorylation, but also stressor-specific mechanisms such as cellular stress and injury, metabolic disorder, programmed cell death, immune response. No changes in plasma glucose level as an indicator of general stress and hepatic histological changes were observed. Although no direct linkage was successfully established between molecular responses and adverse effects at the organism level, the study has enhanced the understanding of the MoA of single radionuclides and mixtures of these.
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Affiliation(s)
- You Song
- Norwegian University of Life Sciences (NMBU), Faculty of Environmental Science and Technology, Department of Environmental Sciences (IMV), Centre for Environmental Radioactivity (CERAD), P.O. Box 5003, N-1432 Ås, Norway; Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, N-0349 Oslo, Norway.
| | - Brit Salbu
- Norwegian University of Life Sciences (NMBU), Faculty of Environmental Science and Technology, Department of Environmental Sciences (IMV), Centre for Environmental Radioactivity (CERAD), P.O. Box 5003, N-1432 Ås, Norway
| | - Hans-Christian Teien
- Norwegian University of Life Sciences (NMBU), Faculty of Environmental Science and Technology, Department of Environmental Sciences (IMV), Centre for Environmental Radioactivity (CERAD), P.O. Box 5003, N-1432 Ås, Norway
| | - Øystein Evensen
- Norwegian University of Life Sciences (NMBU), Department of Basic Sciences and Aquatic Medicine, P.O. Box 8146 Dep., N-0033 Oslo, Norway
| | - Ole Christian Lind
- Norwegian University of Life Sciences (NMBU), Faculty of Environmental Science and Technology, Department of Environmental Sciences (IMV), Centre for Environmental Radioactivity (CERAD), P.O. Box 5003, N-1432 Ås, Norway
| | - Bjørn Olav Rosseland
- Norwegian University of Life Sciences (NMBU), Faculty of Environmental Science and Technology, Department of Environmental Sciences (IMV), Centre for Environmental Radioactivity (CERAD), P.O. Box 5003, N-1432 Ås, Norway; Norwegian University of Life Sciences (NMBU), Department of Ecology and Natural Resource Management (INA), P.O. Box 5003, N-1432 Ås, Norway
| | - Knut Erik Tollefsen
- Norwegian University of Life Sciences (NMBU), Faculty of Environmental Science and Technology, Department of Environmental Sciences (IMV), Centre for Environmental Radioactivity (CERAD), P.O. Box 5003, N-1432 Ås, Norway; Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, N-0349 Oslo, Norway
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Asselman J, De Coninck DIM, Pfrender ME, De Schamphelaere KAC. Gene Body Methylation Patterns in Daphnia Are Associated with Gene Family Size. Genome Biol Evol 2016; 8:1185-96. [PMID: 27017526 PMCID: PMC4860698 DOI: 10.1093/gbe/evw069] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The relation between gene body methylation and gene function remains elusive. Yet, our understanding of this relationship can contribute significant knowledge on how and why organisms target specific gene bodies for methylation. Here, we studied gene body methylation patterns in two Daphnia species. We observed both highly methylated genes and genes devoid of methylation in a background of low global methylation levels. A small but highly significant number of genes was highly methylated in both species. Remarkably, functional analyses indicate that variation in methylation within and between Daphnia species is primarily targeted to small gene families whereas large gene families tend to lack variation. The degree of sequence similarity could not explain the observed pattern. Furthermore, a significant negative correlation between gene family size and the degree of methylation suggests that gene body methylation may help regulate gene family expansion and functional diversification of gene families leading to phenotypic variation.
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Affiliation(s)
- Jana Asselman
- Laboratory for Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit (GhEnToxLab), Ghent University, Ghent, Belgium Department of Biological Sciences, University of Notre Dame
| | - Dieter I M De Coninck
- Laboratory for Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit (GhEnToxLab), Ghent University, Ghent, Belgium Laboratory of Pharmaceutical Biotechnology (labFBT), Ghent University, Ghent, Belgium
| | - Michael E Pfrender
- Department of Biological Sciences, University of Notre Dame Environmental Change Initiative, University of Notre Dame
| | - Karel A C De Schamphelaere
- Laboratory for Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit (GhEnToxLab), Ghent University, Ghent, Belgium
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Drugă B, Turko P, Spaak P, Pomati F. Cyanobacteria Affect Fitness and Genetic Structure of Experimental Daphnia Populations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:3416-3424. [PMID: 26943751 DOI: 10.1021/acs.est.5b05973] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Zooplankton communities can be strongly affected by cyanobacterial blooms, especially species of genus Daphnia, which are key-species in lake ecosystems. Here, we explored the effect of microcystin/nonmicrocystin (MC/non-MC) producing cyanobacteria in the diet of experimental Daphnia galeata populations composed of eight genotypes. We used D. galeata clones hatched from ephippia 10 to 60 years old, which were first tested in monocultures, and then exposed for 10 weeks as mixed populations to three food treatments consisting of green algae combined with cyanobacteria able/unable of producing MC. We measured the expression of nine genes potentially involved in Daphnia acclimation to cyanobacteria: six protease genes, one ubiquitin-conjugating enzyme gene, and two rRNA genes, and then we tracked the dynamics of the genotypes in mixed populations. The expression pattern of one protease and the ubiquitin-conjugating enzyme genes was positively correlated with the increased fitness of competing clones in the presence of cyanobacteria, suggesting physiological plasticity. The genotype dynamics in mixed populations was only partially related to the growth rates of clones in monocultures and varied strongly with the food. Our results revealed strong intraspecific differences in the tolerance of D. galeata clones to MC/non-MC-producing cyanobacteria in their diet, suggesting microevolutionary effects.
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Affiliation(s)
- Bogdan Drugă
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , Department of Aquatic Ecology, 133 Überlandstrasse, 8600 Dübendorf, Switzerland
- Institute of Biological Research , Branch of the National Institute of Research and Development for Biological Sciences, 48 Republicii, 400015 Cluj-Napoca, Romania
| | - Patrick Turko
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , Department of Aquatic Ecology, 133 Überlandstrasse, 8600 Dübendorf, Switzerland
- Institute of Integrative Biology, ETH Zurich , Universitätstrasse 16, 8092 Zürich, Switzerland
| | - Piet Spaak
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , Department of Aquatic Ecology, 133 Überlandstrasse, 8600 Dübendorf, Switzerland
- Institute of Integrative Biology, ETH Zurich , Universitätstrasse 16, 8092 Zürich, Switzerland
| | - Francesco Pomati
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , Department of Aquatic Ecology, 133 Überlandstrasse, 8600 Dübendorf, Switzerland
- Institute of Integrative Biology, ETH Zurich , Universitätstrasse 16, 8092 Zürich, Switzerland
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Sun M, Ting Li Y, Liu Y, Chin Lee S, Wang L. Transcriptome assembly and expression profiling of molecular responses to cadmium toxicity in hepatopancreas of the freshwater crab Sinopotamon henanense. Sci Rep 2016; 6:19405. [PMID: 26786678 PMCID: PMC4726346 DOI: 10.1038/srep19405] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 12/10/2015] [Indexed: 11/25/2022] Open
Abstract
Cadmium (Cd) pollution is a serious global problem, which causes irreversible toxic effects on animals. Freshwater crab, Sinopotamon henanense, is a useful environmental indicator since it is widely distributed in benthic habitats whereby it tends to accumulate Cd and other toxicants. However, its molecular responses to Cd toxicity remain unclear. In this study, we performed transcriptome sequencing and gene expression analyses of its hepatopancreas with and without Cd treatments. A total of 7.78 G clean reads were obtained from the pooled samples, and 68,648 unigenes with an average size of 622 bp were assembled, in which 5,436 were metabolism-associated and 2,728 were stimulus response-associated that include 380 immunity-related unigenes. Expression profile analysis demonstrated that most genes involved in macromolecular metabolism, oxidative phosphorylation, detoxification and anti-oxidant defense were up-regulated by Cd exposure, whereas immunity-related genes were down-regulated, except the genes involved in phagocytosis were up-regulated. The current data indicate that Cd exposure alters gene expressions in a concentration-dependent manner. Therefore, our results provide the first comprehensive S.henanense transcriptome dataset, which is useful for biological and ecotoxicological studies on this crab and its related species at molecular level, and some key Cd-responsive genes may provide candidate biomarkers for monitoring aquatic pollution by heavy metals.
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Affiliation(s)
- Min Sun
- School of Life Science, Shanxi University, Taiyuan 030006, China
| | - Yi Ting Li
- School of Life Science, Shanxi University, Taiyuan 030006, China
| | - Yang Liu
- School of Life Science, Shanxi University, Taiyuan 030006, China
| | - Shao Chin Lee
- School of Life Science, Shanxi University, Taiyuan 030006, China
| | - Lan Wang
- School of Life Science, Shanxi University, Taiyuan 030006, China
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Liu H, Sun P, Liu H, Yang S, Wang L, Wang Z. Acute toxicity of benzophenone-type UV filters for Photobacterium phosphoreum and Daphnia magna: QSAR analysis, interspecies relationship and integrated assessment. CHEMOSPHERE 2015; 135:182-188. [PMID: 25950412 DOI: 10.1016/j.chemosphere.2015.04.036] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 04/11/2015] [Accepted: 04/13/2015] [Indexed: 06/04/2023]
Abstract
The hazardous potential of benzophenone (BP)-type UV filters is becoming an issue of great concern due to the wide application of these compounds in many personal care products. In the present study, the toxicities of BPs to Photobacterium phosphoreum and Daphnia magna were determined. Next, density functional theory (DFT) and comparative molecular field analysis (CoMFA) descriptors were used to obtain more detailed insight into the structure - activity relationships and to preliminarily discuss the toxicity mechanism. Additionally, the sensitivities of the two organisms to BPs and the interspecies toxicity relationship were compared. Moreover, an approach for providing a global index of the environmental risk of BPs to aquatic organisms is proposed. The results demonstrated that the mechanism underlying the toxicity of BPs to P. phosphoreum is primarily related to their electronic properties, and the mechanism of toxicity to D. magna is hydrophobicity. Additionally, D. magna was more sensitive than P. phosphoreum to most of the BPs, with the exceptions of the polyhydric BPs. Moreover, comparisons with published data revealed a high interspecies correlation coefficient among the experimental toxicity values for D. magna and Dugesia japonica. Furthermore, hydrophobicity was also found to be the most important descriptor of integrated toxicity. This investigation will provide insight into the toxicity mechanisms and useful information for assessing the potential ecological risk of BP-type UV filters.
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Affiliation(s)
- Hui Liu
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China; College of Biological and Chemical Engineering, Jiaxing University, Zhejiang, Jiaxing 314001, PR China
| | - Ping Sun
- College of Biological and Chemical Engineering, Jiaxing University, Zhejiang, Jiaxing 314001, PR China
| | - Hongxia Liu
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China; College of Biological and Chemical Engineering, Jiaxing University, Zhejiang, Jiaxing 314001, PR China
| | - Shaogui Yang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China
| | - Liansheng Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China.
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Lee JW, Won EJ, Raisuddin S, Lee JS. Significance of adverse outcome pathways in biomarker-based environmental risk assessment in aquatic organisms. J Environ Sci (China) 2015; 35:115-127. [PMID: 26354700 DOI: 10.1016/j.jes.2015.05.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 05/22/2015] [Accepted: 05/28/2015] [Indexed: 06/05/2023]
Abstract
In environmental risk assessments (ERA), biomarkers have been widely used as an early warning signal of environmental contamination. However, biomarker responses have limitation due to its low relevance to adverse outcomes (e.g., fluctuations in community structure, decreases in population size, and other similar ecobiologically relevant indicators of community structure and function). To mitigate these limitations, the concept of adverse outcome pathways (AOPs) was developed. An AOP is an analytical, sequentially progressive pathway that links a molecular initiating event (MIE) to an adverse outcome. Recently, AOPs have been recognized as a potential informational tool by which the implications of molecular biomarkers in ERA can be better understood. To demonstrate the utility of AOPs in biomarker-based ERA, here we discuss a series of three different biological repercussions caused by exposure to benzo(a)pyrene (BaP), silver nanoparticles (AgNPs), and selenium (Se). Using mainly aquatic invertebrates and selected vertebrates as model species, we focus on the development of the AOP concept. Aquatic organisms are suitable bioindicator species whose entire lifespans can be observed over a short period; moreover, these species can be studied on the molecular and population levels. Also, interspecific differences between aquatic organisms are important to consider in an AOP framework, since these differences are an integral part of the natural environment. The development of an environmental pollutant-mediated AOP may enable a better understanding of the effects of environmental pollutants in different scenarios in the diverse community of an ecosystem.
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Affiliation(s)
- Jin Wuk Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Eun-Ji Won
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Sheikh Raisuddin
- Department of Medical Elementology and Toxicology, Hamdard University, New Delhi 110062, India
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea.
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37
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Rozenberg A, Parida M, Leese F, Weiss LC, Tollrian R, Manak JR. Transcriptional profiling of predator-induced phenotypic plasticity in Daphnia pulex. Front Zool 2015. [PMID: 26213557 PMCID: PMC4514973 DOI: 10.1186/s12983-015-0109-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background Predator-induced defences are a prominent example of phenotypic plasticity found from single-celled organisms to vertebrates. The water flea Daphnia pulex is a very convenient ecological genomic model for studying predator-induced defences as it exhibits substantial morphological changes under predation risk. Most importantly, however, genetically identical clones can be transcriptionally profiled under both control and predation risk conditions and be compared due to the availability of the sequenced reference genome. Earlier gene expression analyses of candidate genes as well as a tiled genomic microarray expression experiment have provided insights into some genes involved in predator-induced phenotypic plasticity. Here we performed the first RNA-Seq analysis to identify genes that were differentially expressed in defended vs. undefended D. pulex specimens in order to explore the genetic mechanisms underlying predator-induced defences at a qualitatively novel level. Results We report 230 differentially expressed genes (158 up- and 72 down-regulated) identified in at least two of three different assembly approaches. Several of the differentially regulated genes belong to families of paralogous genes. The most prominent classes amongst the up-regulated genes include cuticle genes, zinc-metalloproteinases and vitellogenin genes. Furthermore, several genes from this group code for proteins recruited in chromatin-reorganization or regulation of the cell cycle (cyclins). Down-regulated gene classes include C-type lectins, proteins involved in lipogenesis, and other families, some of which encode proteins with no known molecular function. Conclusions The RNA-Seq transcriptome data presented in this study provide important insights into gene regulatory patterns underlying predator-induced defences. In particular, we characterized different effector genes and gene families found to be regulated in Daphnia in response to the presence of an invertebrate predator. These effector genes are mostly in agreement with expectations based on observed phenotypic changes including morphological alterations, i.e., expression of proteins involved in formation of protective structures and in cuticle strengthening, as well as proteins required for resource re-allocation. Our findings identify key genetic pathways associated with anti-predator defences. Electronic supplementary material The online version of this article (doi:10.1186/s12983-015-0109-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andrey Rozenberg
- Department of Animal Ecology, Evolution and Biodiversity, Ruhr University Bochum, Universitaetsstrasse 150, Bochum, 44801 Germany
| | - Mrutyunjaya Parida
- Departments of Biology and Pediatrics and the Roy J. Carver Center for Genomics, 459 Biology Building, University of Iowa, Iowa City, IA 52242 USA
| | - Florian Leese
- Department of Animal Ecology, Evolution and Biodiversity, Ruhr University Bochum, Universitaetsstrasse 150, Bochum, 44801 Germany.,Present address: University of Duisburg-Essen, Aquatic Ecosystems Research, Universitaetsstrasse 5, Essen, 45141 Germany
| | - Linda C Weiss
- Department of Animal Ecology, Evolution and Biodiversity, Ruhr University Bochum, Universitaetsstrasse 150, Bochum, 44801 Germany.,Environmental Genomics Group, School of Biosciences, University of Birmingham, Birmingham, B15 2TT UK
| | - Ralph Tollrian
- Department of Animal Ecology, Evolution and Biodiversity, Ruhr University Bochum, Universitaetsstrasse 150, Bochum, 44801 Germany
| | - J Robert Manak
- Departments of Biology and Pediatrics and the Roy J. Carver Center for Genomics, 459 Biology Building, University of Iowa, Iowa City, IA 52242 USA
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Otte KA, Schrank I, Fröhlich T, Arnold GJ, Laforsch C. Interclonal proteomic responses to predator exposure inDaphnia magnamay depend on predator composition of habitats. Mol Ecol 2015; 24:3901-17. [DOI: 10.1111/mec.13287] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 06/09/2015] [Accepted: 06/17/2015] [Indexed: 01/15/2023]
Affiliation(s)
- Kathrin A. Otte
- Laboratory for Functional Genome Analysis (LAFUGA); Gene Center; Ludwig-Maximilians-University Munich; Feodor-Lynen-Strasse 25 81377 Munich Germany
- Department Biology II; Ludwig Maximilians University Munich; Grosshaderner Street 2 82152 Planegg-Martinsried Germany
- Animal Ecology I and BayCEER; University of Bayreuth; Universitätsstrasse 30 95440 Bayreuth Germany
| | - Isabella Schrank
- Animal Ecology I and BayCEER; University of Bayreuth; Universitätsstrasse 30 95440 Bayreuth Germany
| | - Thomas Fröhlich
- Laboratory for Functional Genome Analysis (LAFUGA); Gene Center; Ludwig-Maximilians-University Munich; Feodor-Lynen-Strasse 25 81377 Munich Germany
| | - Georg J. Arnold
- Laboratory for Functional Genome Analysis (LAFUGA); Gene Center; Ludwig-Maximilians-University Munich; Feodor-Lynen-Strasse 25 81377 Munich Germany
| | - Christian Laforsch
- Animal Ecology I and BayCEER; University of Bayreuth; Universitätsstrasse 30 95440 Bayreuth Germany
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Sengupta N, Litoff EJ, Baldwin WS. The HR96 activator, atrazine, reduces sensitivity of D. magna to triclosan and DHA. CHEMOSPHERE 2015; 128:299-306. [PMID: 25747156 PMCID: PMC4380624 DOI: 10.1016/j.chemosphere.2015.02.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/06/2015] [Accepted: 02/07/2015] [Indexed: 05/20/2023]
Abstract
HR96 is a CAR/PXR/VDR ortholog in invertebrates, and a promiscuous endo- and xenobiotic nuclear receptor involved in acclimation to toxicants. Daphnia HR96 is activated by chemicals such as atrazine and linoleic acid (LA) (n-6 fatty acid), and inhibited by triclosan and docosahexaenoic acid (DHA) (n-3 fatty acid). We hypothesized that inhibitors of HR96 may block the protective responses of HR96 based on previously performed luciferase assays. Therefore, we performed acute toxicity tests with two-chemical mixtures containing a HR96 inhibitor (DHA or triclosan) and a HR96 activator (LA or atrazine). Surprisingly, results demonstrate that triclosan and DHA are less toxic when co-treated with 20-80 μM atrazine. Atrazine provides concentration-dependent protection as lower concentrations have no effect and higher concentrations cause toxicity. LA, a weaker HR96 activator, did not provide protection from triclosan or DHA. Atrazine's protective effects are presumably due to its ability to activate HR96 or other toxicologically relevant transcription factors and induce protective enzymes. Atrazine did not significantly induce glucosyltransferase, a crucial enzyme in triclosan detoxification. However, atrazine did increase antioxidant activities, crucial pathways in triclosan's toxicity, as measured through GST activity and the TROLOX equivalence assay. The increase in antioxidant capacity is consistent with atrazine providing protection from a wide range of toxicants that induce ROS, including triclosan and unsaturated fatty acids predisposed to lipid peroxidation.
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Affiliation(s)
- Namrata Sengupta
- Clemson University, Environmental Toxicology Program, United States
| | | | - William S Baldwin
- Clemson University, Environmental Toxicology Program, United States; Clemson University, Biological Sciences, United States.
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40
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Sengupta N, Litoff EJ, Baldwin WS. The HR96 activator, atrazine, reduces sensitivity of D. magna to triclosan and DHA. CHEMOSPHERE 2015; 128:299-306. [PMID: 25747156 DOI: 10.1002/dev.21214.developmental] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/06/2015] [Accepted: 02/07/2015] [Indexed: 05/24/2023]
Abstract
HR96 is a CAR/PXR/VDR ortholog in invertebrates, and a promiscuous endo- and xenobiotic nuclear receptor involved in acclimation to toxicants. Daphnia HR96 is activated by chemicals such as atrazine and linoleic acid (LA) (n-6 fatty acid), and inhibited by triclosan and docosahexaenoic acid (DHA) (n-3 fatty acid). We hypothesized that inhibitors of HR96 may block the protective responses of HR96 based on previously performed luciferase assays. Therefore, we performed acute toxicity tests with two-chemical mixtures containing a HR96 inhibitor (DHA or triclosan) and a HR96 activator (LA or atrazine). Surprisingly, results demonstrate that triclosan and DHA are less toxic when co-treated with 20-80 μM atrazine. Atrazine provides concentration-dependent protection as lower concentrations have no effect and higher concentrations cause toxicity. LA, a weaker HR96 activator, did not provide protection from triclosan or DHA. Atrazine's protective effects are presumably due to its ability to activate HR96 or other toxicologically relevant transcription factors and induce protective enzymes. Atrazine did not significantly induce glucosyltransferase, a crucial enzyme in triclosan detoxification. However, atrazine did increase antioxidant activities, crucial pathways in triclosan's toxicity, as measured through GST activity and the TROLOX equivalence assay. The increase in antioxidant capacity is consistent with atrazine providing protection from a wide range of toxicants that induce ROS, including triclosan and unsaturated fatty acids predisposed to lipid peroxidation.
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Affiliation(s)
- Namrata Sengupta
- Clemson University, Environmental Toxicology Program, United States
| | | | - William S Baldwin
- Clemson University, Environmental Toxicology Program, United States; Clemson University, Biological Sciences, United States.
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41
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Asselman J, Pfrender ME, Lopez JA, De Coninck DIM, Janssen CR, Shaw JR, De Schamphelaere KAC. Conserved transcriptional responses to cyanobacterial stressors are mediated by alternate regulation of paralogous genes in Daphnia. Mol Ecol 2015; 24:1844-55. [PMID: 25754071 DOI: 10.1111/mec.13148] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 03/04/2015] [Accepted: 03/05/2015] [Indexed: 11/28/2022]
Abstract
Despite a significant increase in genomic data, our knowledge of gene functions and their transcriptional responses to environmental stimuli remains limited. Here, we use the model keystone species Daphnia pulex to study environmental responses of genes in the context of their gene family history to better understand the relationship between genome structure and gene function in response to environmental stimuli. Daphnia were exposed to five different treatments, each consisting of a diet supplemented with one of five cyanobacterial species, and a control treatment consisting of a diet of only green algae. Differential gene expression profiles of Daphnia exposed to each of these five cyanobacterial species showed that genes with known functions are more likely to be shared by different expression profiles, whereas genes specific to the lineage of Daphnia are more likely to be unique to a given expression profile. Furthermore, while only a small number of nonlineage-specific genes were conserved across treatment type, there was a high degree of overlap in expression profiles at the functional level. The conservation of functional responses across the different cyanobacterial treatments can be attributed to the treatment-specific expression of different paralogous genes within the same gene family. Comparison with available gene expression data in the literature suggests differences in nutritional composition in diets with cyanobacterial species compared to diets of green algae as a primary driver for cyanobacterial effects on Daphnia. We conclude that conserved functional responses in Daphnia across different cyanobacterial treatments are mediated through alternate regulation of paralogous gene families.
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Affiliation(s)
- Jana Asselman
- Laboratory of Environmental Toxicology and Aquatic Ecology, GhEnToxLab unit, Ghent University, J. Plateaustraat 22, 9000, Gent, Belgium; Department of Biological Sciences, University of Notre Dame, Notre Dame, 46556, IN, USA
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Roy Chowdhury P, Frisch D, Becker D, Lopez JA, Weider LJ, Colbourne JK, Jeyasingh PD. Differential transcriptomic responses of ancient and modern Daphnia genotypes to phosphorus supply. Mol Ecol 2015; 24:123-35. [PMID: 25410011 DOI: 10.1111/mec.13009] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 10/31/2014] [Accepted: 11/06/2014] [Indexed: 01/13/2023]
Abstract
Little is known about the role of transcriptomic changes in driving phenotypic evolution in natural populations, particularly in response to anthropogenic environmental change. Previous analyses of Daphnia genotypes separated by centuries of evolution in a lake using methods in resurrection ecology revealed striking genetic and phenotypic shifts that were highly correlated with anthropogenic environmental change, specifically phosphorus (P)-driven nutrient enrichment (i.e. eutrophication). Here, we compared the transcriptomes of two ancient (~700-year-old) and two modern (~10-year-old) genotypes in historic (low P) and contemporary (high P) environmental conditions using microarrays. We found considerable transcriptomic variation between 'ancient' and 'modern' genotypes in both treatments, with stressful (low P) conditions eliciting differential expression (DE) of a larger number of genes. Further, more genes were DE between 'ancient' and 'modern' genotypes than within these groups. Expression patterns of individual genes differed greatly among genotypes, suggesting that different transcriptomic responses can result in similar phenotypes. While this confounded patterns between 'ancient' and 'modern' genotypes at the gene level, patterns were discernible at the functional level: annotation of DE genes revealed particular enrichment of genes involved in metabolic pathways in response to P-treatments. Analyses of gene families suggested significant DE in pathways already known to be important in dealing with P-limitation in Daphnia as well as in other organisms. Such observations on genotypes of a single natural population, separated by hundreds of years of evolution in contrasting environmental conditions before and during anthropogenic environmental changes, highlight the important role of transcriptional mechanisms in the evolutionary responses of populations.
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Affiliation(s)
- Priyanka Roy Chowdhury
- Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, Stillwater, OK, 74078, USA
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Hoffmann A, Griffin P, Dillon S, Catullo R, Rane R, Byrne M, Jordan R, Oakeshott J, Weeks A, Joseph L, Lockhart P, Borevitz J, Sgrò C. A framework for incorporating evolutionary genomics into biodiversity conservation and management. ACTA ACUST UNITED AC 2015. [DOI: 10.1186/s40665-014-0009-x] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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