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Salahuddin MF, Qrareya AN, Mahdi F, Jackson D, Foster M, Vujanovic T, Box JG, Paris JJ. Combined HIV-1 Tat and oxycodone activate the hypothalamic-pituitary-adrenal and -gonadal axes and promote psychomotor, affective, and cognitive dysfunction in female mice. Horm Behav 2020; 119:104649. [PMID: 31821792 PMCID: PMC7071558 DOI: 10.1016/j.yhbeh.2019.104649] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 09/26/2019] [Accepted: 11/26/2019] [Indexed: 12/31/2022]
Abstract
The majority of HIV+ patients present with neuroendocrine dysfunction and ~50% experience co-morbid neurological symptoms including motor, affective, and cognitive dysfunction, collectively termed neuroHIV. In preclinical models, the neurotoxic HIV-1 regulatory protein, trans-activator of transcription (Tat), promotes neuroHIV pathology that can be exacerbated by opioids. We and others find gonadal steroids, estradiol (E2) or progesterone (P4), to rescue Tat-mediated pathology. However, the combined effects of Tat and opioids on neuroendocrine function and the subsequent ameliorative capacity of gonadal steroids are unknown. We found that conditional HIV-1 Tat expression in naturally-cycling transgenic mice dose-dependently potentiated oxycodone-mediated psychomotor behavior. Tat increased depression-like behavior in a tail-suspension test among proestrous mice, but decreased it among diestrous mice (who already demonstrated greater depression-like behavior); oxycodone reversed these effects. Combined Tat and oxycodone produced apparent behavioral disinhibition of anxiety-like responding which was greater on diestrus than on proestrus. These mice made more central entries in an open field, but spent less time there and demonstrated greater circulating corticosterone. Tat increased the E2:P4 ratio of circulating steroids on diestrus and acute oxycodone attenuated this effect, but repeated oxycodone exacerbated it. Corticotropin-releasing factor was increased by Tat expression, acute oxycodone exposure, and was greater on diestrus compared to proestrus. In human neuroblastoma cells, Tat exerted neurotoxicity that was ameliorated by E2 (1 or 10 nM) or P4 (100, but not 10 nM) independent of oxycodone. Oxycodone decreased gene expression of estrogen and κ-opioid receptors. Thus, neuroendocrine function may be an important target for HIV-1 Tat/opioid interactions.
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Affiliation(s)
- Mohammed F Salahuddin
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA
| | - Alaa N Qrareya
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA
| | - Fakhri Mahdi
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA
| | - Dejun Jackson
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA
| | - Matthew Foster
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA
| | - Tamara Vujanovic
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA
| | - J Gaston Box
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA
| | - Jason J Paris
- Department of BioMolecular Sciences, University of Mississippi, School of Pharmacy, University, MS 38677-1848, USA; Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS 38677, USA.
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Yang L, Shen Q, Zeng T, Li J, Li W, Wang Y. Enrichment of imidacloprid and its metabolites in lizards and its toxic effects on gonads. Environ Pollut 2020; 258:113748. [PMID: 31874432 DOI: 10.1016/j.envpol.2019.113748] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 12/05/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
Soil contaminants can cause direct harm to lizards due to their regular swallowing of soil particles. As the world's fastest growing insecticide with long half-life in soil, the endocrine disrupting effect of neonicotinoids on lizards deserves more attention. In this report, we assessed the endocrine disrupting effect of imidacloprid on Eremias argus during 28 days of continuous exposure. Among the imidacloprid and its metabolites, only the metabolite 6-chloropyridic acid had a significant accumulation in the gonads and was positively correlated with its blood concentration. Imidacloprid might cause endocrine disrupting effects on lizards in two ways. First, the desnitro metabolites of imidacloprid could accumulate in the brain, inhibited the secretion of gonadotropin-releasing hormone, and ultimately affected the feedback regulation of hypothalamic-pituitary-gonadal related hormones. Secondly, imidacloprid severely inhibited the gene expression of the corresponding enzymes in the gonadal anti-oxidative stress system, causing histological damage to the gonads and ultimately affecting gonadal function. Specifically, exposure to imidacloprid resulted in abnormal arrangement of spermatogenic epithelial epithelium, hyperplasia of epididymal wall, and oligospermia of male lizard. Meanwhile, gene expressions of cyp17, cyp19, and hsd17β were severely inhibited in the imidacloprid exposure group, consistent with decreased levels of testosterone and estradiol in plasma. Imidacloprid exposure could cause insufficient androgen secretion and less spermatogenesis in male lizards. The risk of imidacloprid exposure to female lizards was not as severe as that of male lizards, but it still inhibited the expression of cyp19 in the ovaries and led to a decrease in the synthesis of estradiol. This study firstly reported the endocrine disruption of imidacloprid to lizards, providing new data for limiting the use of neonicotinoids.
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Affiliation(s)
- Lu Yang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Yuquan RD 19A, Beijing, 100049, PR China
| | - Qiuxuan Shen
- Beijing Jingshan School Chaoyang Campus, Beijing, 100012, PR China
| | - Tao Zeng
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, PR China
| | - Jianzhong Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing, 100085, PR China
| | - Wei Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing, 100085, PR China
| | - Yinghuan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing, 100085, PR China.
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Kahal A, Allem R, Zahzeh T, Koriche S, Kouri A, Douani A, Kassoul H, Ababou A. Evolutions in cardiac and gonadal ultra-structure during a "cycle" of androgenic anabolic abuse in adult male mice. Steroids 2020; 155:108571. [PMID: 31901424 DOI: 10.1016/j.steroids.2019.108571] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 12/27/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND The importance of the present study comes from the lack of sufficient information about the reversibility of the potential histopathological alterations which may result from anabolic androgenic drugs abuse by "Cycling" protocol. So, the aim of this study is to explore the negative effects of Deca-Durabolin abuse in cardiac and gonadal ultra-structures during an administration cycle. METHODS For our purpose, study was performed on 40 male adult mices. Animals were divided into five groups of 8 animals each treated weekly by Deca-Durabolin (nandrolone decanoate) at 30 g/kg of BW during one month (GI); during two months (GII); during three months (GIII); during three months followed by six weeks of treatment discontinuation (GIV) and Control (C). Cytohistological examinations to determine the histopathological damage properties of the heart and tests were performed. RESULTS Our results showed that the animals supported very well the administrated substance. Our study showed important degenerative changes in cardiac and gonadal tissues after one months of androgen abuse. These damages increases with the duration of treatment with well marked cell lesions, and worsen again 6 weeks after stopping treatment in cardiac tissue, whereas the gonadal tissue does not recover completely during this period. CONCLUSION These results ported that the use of AAS with "Cycling" may lead to irreversibly destroy the heart tissue. Either, "Cycling" does not ensure the complete recovery of fertility in AAS abusers.
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Affiliation(s)
- Aida Kahal
- Laboratory of Natural Bioresources, Faculty of Science of Nature and Life, Department of Biology, University of Hassiba Ben Bouali, BP 151, 02000 Chlef, Algeria.
| | - Rachida Allem
- Laboratory of Natural Bioresources, Faculty of Science of Nature and Life, Department of Biology, University of Hassiba Ben Bouali, BP 151, 02000 Chlef, Algeria
| | - Touria Zahzeh
- Laboratory of Molecular Microbiology, Proteomics and Health, Department of Biology, University of Djillali Liabes Sidi Bel Abbès, Algeria
| | - Sana Koriche
- Faculty of Science of Nature and Life, Department of Biology, University of Hassiba Ben Bouali, Chlef, Algeria
| | - Amina Kouri
- Faculty of Science of Nature and Life, Department of Biology, University of Hassiba Ben Bouali, Chlef, Algeria
| | - Asma Douani
- Faculty of Science of Nature and Life, Department of Biology, University of Hassiba Ben Bouali, Chlef, Algeria
| | - Hadjira Kassoul
- Faculty of Science of Nature and Life, Department of Biology, University of Hassiba Ben Bouali, Chlef, Algeria
| | - Adda Ababou
- Faculty of Science of Nature and Life, Department of Biology, University of Hassiba Ben Bouali, Chlef, Algeria
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Zhang J, Qian L, Wang C, Teng M, Duan M, Zhou Y, Chen X, Bo R, Wang C, Li X. Dysregulation of endocrine disruption, apoptosis and the transgenerational toxicity induced by spirotetramat. Chemosphere 2020; 240:124900. [PMID: 31563099 DOI: 10.1016/j.chemosphere.2019.124900] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/11/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Spirotetramat (SPT) is a new tetronic acid derivative insecticide used to control scales and aphids; the potential for endocrine disruptor effects in fish could not be finalized with the available data. In this study, zebrafish were selected to assess the endocrine-disrupting effects. Significant decrease of plasma estradiol (E2), testosterone (T) and 11-ketotestosterone (11-KT) were observed in both male and female following the spirotetramat exposure; the vitellogenin (VTG) level in females significantly decreased. The expression of the hypothalamic-pituitary-gonad (HPG) axis genes fshr, lhr and esr1 showed significant increase in the gonads, which expression in males is higher than in females. In addition, the activities of capspase-3 and caspase-9 significantly decreased in both males and females liver, while the capspase-3 and caspase-9 were increased in male testis, the mRNA expression levels of genes expression related to the apoptosis pathway were also significantly altered after the spirotetramat exposure. Additionally, we found the parental zebrafish exposed to spirotetramat induced the development delay of its offspring. Above all, the adverse effects induced by spirotetramat suggesting that spirotetramat is a potential exogenous hazardous agent.
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Affiliation(s)
- Jie Zhang
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China
| | - Le Qian
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China
| | - Chen Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Miaomiao Teng
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China
| | - Manman Duan
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China
| | - Yimeng Zhou
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China
| | - Xiangguang Chen
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China
| | - Rui Bo
- The Institute for the Control of Agrochemicals, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing, 100125, China
| | - Chengju Wang
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China
| | - Xuefeng Li
- College of Sciences, China Agricultural University, No. 2 Yuan mingyuan West Road, Haidian District, Beijing, 100193, China.
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Ayobahan SU, Eilebrecht S, Baumann L, Teigeler M, Hollert H, Kalkhof S, Eilebrecht E, Schäfers C. Detection of biomarkers to differentiate endocrine disruption from hepatotoxicity in zebrafish (Danio rerio) using proteomics. Chemosphere 2020; 240:124970. [PMID: 31726584 DOI: 10.1016/j.chemosphere.2019.124970] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
Measurement of specific biomarkers identified by proteomics provides a potential alternative method for risk assessment, which is required to discriminate between hepatotoxicity and endocrine disruption. In this study, adult zebrafish (Danio rerio) were exposed to the hepatotoxic substance acetaminophen (APAP) for 21 days, in a fish short-term reproduction assay (FSTRA). The molecular changes induced by APAP exposure were studied in liver and gonads by applying a previously developed combined FSTRA and proteomics approach. We observed a significant decrease in egg numbers, an increase in plasma hyaluronic acid, and the presence of single cell necrosis in liver tissue. Furthermore, nine common biomarkers (atp5f1b, etfa, uqcrc2a, cahz, c3a.1, rab11ba, mettl7a, khdrbs1a and si:dkey-108k21.24) for assessing hepatotoxicity were detected in both male and female liver, indicating hepatic damage. In comparison with exposure to fadrozole, an endocrine disrupting chemical (EDC), three potential biomarkers for liver injury, i.e. cahz, c3a.1 and atp5f1b, were differentially expressed. The zebrafish proteome response to fadrozole exposure indicated a significant regulation in estrogen synthesis and perturbed binding of sperm to zona pellucida in the ovary. This study demonstrates that biomarkers identified and quantified by proteomics can serve as additional weight-of-evidence for the discrimination of hepatotoxicity and endocrine disruption, which is necessary for hazard identification in EU legislation and to decide upon the option for risk assessment.
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Affiliation(s)
- Steve U Ayobahan
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Schmallenberg, Germany; Institute of Environmental Research (Biology V), RWTH Aachen, Aachen, Germany.
| | - Sebastian Eilebrecht
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Schmallenberg, Germany
| | - Lisa Baumann
- Aquatic Ecology & Toxicology, University of Heidelberg, Heidelberg, Germany
| | - Matthias Teigeler
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Schmallenberg, Germany
| | - Henner Hollert
- Institute of Environmental Research (Biology V), RWTH Aachen, Aachen, Germany
| | - Stefan Kalkhof
- Institute for Bioanalysis, University of Applied Sciences Coburg, Coburg, Germany
| | - Elke Eilebrecht
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Schmallenberg, Germany.
| | - Christoph Schäfers
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Schmallenberg, Germany
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Valencia A, Andrieu J, Nzioka A, Cancio I, Ortiz-Zarragoitia M. Transcription pattern of reproduction relevant genes along the brain-pituitary-gonad axis of female, male and intersex thicklip grey mullets, Chelon labrosus, from a polluted harbor. Gen Comp Endocrinol 2020; 287:113339. [PMID: 31759976 DOI: 10.1016/j.ygcen.2019.113339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/19/2019] [Accepted: 11/19/2019] [Indexed: 01/01/2023]
Abstract
The reproductive cycle of teleost fishes is regulated by the brain-pituitary-gonad (BPG) axis. The transcription profile of genes involved in the reproduction signalling in the BPG-axis differs in females and males during the gametogenic cycle. Impacts of endocrine disrupting chemicals on these signalling pathways in fish are known, but the participation of the BPG-axis in the development of the intersex condition is not well understood. Intersex thicklip grey mullets (Chelon labrosus) have been identified in several estuaries from the SE Bay of Biscay, revealing the presence of feminizing contaminants in the area. In previous studies, transcription patterns of genes related with steroidogenesis and gamete growth have been shown to differ among female, male and intersex mullets. However, many components of the reproduction control have not been studied yet. The aim of this study was to assess the transcription levels of target BPG-axis genes in female, male and intersex mullets captured in the polluted harbour of Pasaia, during their gametogenic cycle. After histologically examining the gonads, the transcription levels of previously sequenced target genes were measured by qPCR: kiss2, gpr54 and gnrh1 in brain, fshβ and lhβ in pituitary and fshr and lhr in gonads. In both females and males, brain genes were most transcribed in early gametogenesis, proving their relevance in the onset of both oogenesis and spermatogenesis. Pituitary gonadotropins in females showed upregulation as oogenesis progressed, reaching the highest transcription levels at vitellogenic stage, while in males transcript levels were constant during spermatogenesis. Transcription levels of gonadotropin receptors showed different patterns in ovaries and testes, suggesting differing function in relation to gametogenesis and maturation. Intersex mullets showed transcription levels of brain target genes similar to those observed in females at cortical alveoli stage and to those in mid spermatogenic males. In intersex testes the transcription pattern of gonadotropin receptor fshr was downregulated in comparison to non-intersex testes.
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Affiliation(s)
- Ainara Valencia
- CBET Research Group, Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept, (Faculty of Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - Josu Andrieu
- CBET Research Group, Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept, (Faculty of Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - Anthony Nzioka
- CBET Research Group, Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept, (Faculty of Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - Ibon Cancio
- CBET Research Group, Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept, (Faculty of Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - Maren Ortiz-Zarragoitia
- CBET Research Group, Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept, (Faculty of Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain.
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Tetreault GR, Bennett CJ, Clark TW, Keith H, Parrott JL, McMaster ME. Fish Performance Indicators Adjacent to Oil Sands Activity: Response in Performance Indicators of Slimy Sculpin in the Steepbank River, Alberta, Adjacent to Oil Sands Mining Activity. Environ Toxicol Chem 2020; 39:396-409. [PMID: 31645081 DOI: 10.1002/etc.4625] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/11/2019] [Accepted: 10/18/2019] [Indexed: 05/05/2023]
Abstract
Since 2009, the Canadian and Alberta governments have been developing monitoring plans for surface water quality and quantity of the lower Athabasca River and its tributaries (2010-2013). The objectives of the present study to the fish monitoring program were to 1) assess the current status of fish in a tributary of the lower Athabasca River, 2) identify existing differences between upstream reference and within the oil sands deposit exposure sites, and 3) identify trends/changes in fish performance indicators relative to historical studies. The present study examines the fish performance indicators in slimy sculpin (Cottus cognatus) in the Steepbank River, Alberta, in terms of growth, gonad size, condition, and hepatic 7-ethoxyresorufin-O-deethylase (EROD) activity as an indicator of exposure to oil-sands-related compounds. The sampling program followed historical sampling methods (1999-2000) to provide comparable data over time with an additional upstream site (n = 2) added as development progressed. Consistent changes were documented in sculpin collected from downstream sections of the Steepbank River within the oil sands deposit (n = 2) in 2010 through 2013. Sculpin demonstrated increased liver size with corresponding induction of EROD activity consistent with historical data and reductions in energy investment relative to reproductive development and gonadal steroid production capacity. There was no consistent evidence of changes in fish performance indicators with increased surface mining development, particularly adjacent to the Steepbank River Mid site. Although physical development in the Steepbank watershed has increased over the last 15 yr, these results are consistent with historical data suggesting that the magnitude of the response in the aquatic environment adjacent to the development has not changed. Environ Toxicol Chem 2020;39:396-409. © 2019 SETAC.
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Affiliation(s)
- Gerald R Tetreault
- Aquatic Contaminant Research Division, Water Science and Technology Directorate, Environment and Climate Change Canada, Burlington, Ontario, Canada
| | - Charles J Bennett
- Aquatic Contaminant Research Division, Water Science and Technology Directorate, Environment and Climate Change Canada, Burlington, Ontario, Canada
| | - Thomas W Clark
- Aquatic Contaminant Research Division, Water Science and Technology Directorate, Environment and Climate Change Canada, Burlington, Ontario, Canada
| | - Heather Keith
- Hatfield Consultants, North Vancouver, British Columbia, Canada
| | - Joanne L Parrott
- Aquatic Contaminant Research Division, Water Science and Technology Directorate, Environment and Climate Change Canada, Burlington, Ontario, Canada
| | - Mark E McMaster
- Aquatic Contaminant Research Division, Water Science and Technology Directorate, Environment and Climate Change Canada, Burlington, Ontario, Canada
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Madison FN, Shah N, Ball GF. Intraspecific variation in testosterone-induced neuroplasticity in two canary strains. Horm Behav 2020; 118:104617. [PMID: 31647924 DOI: 10.1016/j.yhbeh.2019.104617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/15/2019] [Accepted: 10/12/2019] [Indexed: 10/25/2022]
Abstract
Temperate zone songbird species, such as the canary (Serinus canaria), can serve as model systems to investigate adult seasonal plasticity in brain and behavior. An increase in day length, experienced by canaries in the early spring stimulates gonadal recrudescence and an associated increase in circulating testosterone concentrations. This increase in plasma testosterone results in marked morphological changes in well-defined neural circuitry regulating reproductive behaviors including birdsong as well as behavioral changes such as increases in song length and complexity. An obvious measure of plasticity in neural morphology can be assessed via changes in brain nuclei volume and testosterone actions on a number of cellular features including the integration and incorporation of new neurons in the adult canary brain. Previous work in our lab suggests that there may be systematic intraspecific variability within canaries in testosterone-induced adult neuroplasticity. For example, the song nucleus HVC increases in size in response to testosterone in male canaries but we found that males of the American Singer strain exhibited minimal and variable responses as compared to other canary strains such as the Border canary strain, which is thought to be closer to wild type canaries. In this study, we systematically compared the effects of testosterone on the volume of song nuclei and the number of new neurons as assessed with the neurogenesis marker doublecortin in American Singer and Border canaries. We found more pronounced testosterone-induced neuroplasticity in the Border strain than the American Singer. These data suggest that the process of selection for certain strain phenotypes is also associated with significant changes in hormone-regulated brain plasticity.
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Affiliation(s)
- Farrah N Madison
- Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD 21218, United States of America; Department of Psychology, University of Maryland, College Park, MD 20742, United States of America.
| | - Nisha Shah
- Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD 21218, United States of America
| | - Gregory F Ball
- Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD 21218, United States of America; Department of Psychology, University of Maryland, College Park, MD 20742, United States of America
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Cervantes-Camacho I, Guerrero-Estévez SM, López MF, Alarcón-Hernández E, López-López E. Effects of Bisphenol A on Foxl2 gene expression and DNA damage in adult viviparous fish Goodeaatripinnis. J Toxicol Environ Health A 2020; 83:95-112. [PMID: 32075523 DOI: 10.1080/15287394.2020.1730282] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Bisphenol A (BPA) is an emerging pollutant of global concern. Viviparous fish Goodea atripinnis is endemic to the Central Mexican Plateau where BPA was detected; however, few studies examined the influence of this chemical on native viviparous fish. The effects of BPA (sublethal dose) were determined on DNA integrity and Foxl2 expression in G. atripinnis gonads, and interactions of BPA with FOXL2 protein. Genotoxicity analysis revealed that % comets, at 14 and 28 days and comet tail length (at 14 days) were significantly higher in exposed compared to controls. In general, the % DNA tail was not markedly higher in BPA-treated fish; however, tail moment related to tail length exhibited significant increases in DNA damage. RT-qPCR assays showed Foxl2 overexpression after 14 and 28 days of exposure in females; while in males, Foxl2 was overexpressed after 28 days. In silico analysis demonstrated that BPA interacted with seven residues located in FOXL2 homeodomain. In summary, sublethal BPA doses induced DNA damage and changes in Foxl2 expression in gonadal cells of G. atripinnis, which may adversely affect reproduction in BPA-exposed wild populations. Foxl2 overexpression and BPA-FOXL2 interaction suggested alterations in processes involving Foxl2. Viviparous fish may thus serve as potential non-conventional models for assessing pollutants effects.
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Affiliation(s)
- Isabel Cervantes-Camacho
- Laboratorio De Evaluación De La Salud De Los Ecosistemas Acuáticos, Escuela Nacional De Ciencias Biológicas, Instituto Politécnico Nacional. Prolongación Carpio Y Plan De Ayala S/N Col. Sto. Tomás, Ciudad de México, México
| | - Sandra M Guerrero-Estévez
- Laboratorio De Evaluación De La Salud De Los Ecosistemas Acuáticos, Escuela Nacional De Ciencias Biológicas, Instituto Politécnico Nacional. Prolongación Carpio Y Plan De Ayala S/N Col. Sto. Tomás, Ciudad de México, México
| | - María Fernanda López
- Laboratorio De Variación Biológica Y Evolución, Escuela Nacional De Ciencias Biológicas, Instituto Politécnico Nacional. Prolongación Carpio Y Plan De Ayala S/N Col. Sto. Tomás, Ciudad de México, México
| | - Ernesto Alarcón-Hernández
- Laboratorio De Genética Molecular, Escuela Nacional De Ciencias Biológicas, Instituto Politécnico Nacional. Prolongación Carpio Y Plan De Ayala S/N Col. Sto. Tomás, Ciudad de México, México
| | - Eugenia López-López
- Laboratorio De Evaluación De La Salud De Los Ecosistemas Acuáticos, Escuela Nacional De Ciencias Biológicas, Instituto Politécnico Nacional. Prolongación Carpio Y Plan De Ayala S/N Col. Sto. Tomás, Ciudad de México, México
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Šauer P, Tumová J, Steinbach C, Golovko O, Komen H, Maillot-Maréchal E, Máchová J, Grabic R, Aït-Aïssa S, Kocour Kroupová H. Chronic simultaneous exposure of common carp (Cyprinus carpio) from embryonic to juvenile stage to drospirenone and gestodene at low ng/L level caused intersex. Ecotoxicol Environ Saf 2020; 188:109912. [PMID: 31706240 DOI: 10.1016/j.ecoenv.2019.109912] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/15/2019] [Accepted: 11/02/2019] [Indexed: 06/10/2023]
Abstract
Synthetic progestins are emerging contaminants of the aquatic environment with endocrine disrupting potential. The main aim of the present study was to investigate the effects of the synthetic progestins gestodene, and drospirenone on sex differentiation in common carp (Cyprinus carpio) by histological analysis. To gain insights into the mechanisms behind the observations from the in vivo experiment on sex differentiation, we analyzed expression of genes involved in hypothalamus-pituitary-gonad (HPG) and hypothalamus-pituitary-thyroid (HPT) axes, histology of hepatopancreas, and in vitro bioassays. Carp were continuously exposed to concentrations of 2 ng/L of single progestins (gestodene or drospirenone) or to their mixture at concentration 2 ng/L of each. The exposure started 24 h after fertilization of eggs and concluded 160 days post-hatching. Our results showed that exposure of common carp to a binary mixture of drospirenone and gestodene caused increased incidence of intersex (32%) when compared to clean water and solvent control groups (both 3%). Intersex most probably was induced by a combination of multiple modes of action of the studied substances, namely anti-gonadotropic activity, interference with androgen receptor, and potentially also with HPT axis or estrogen receptor.
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Affiliation(s)
- Pavel Šauer
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, Vodňany, Czech Republic.
| | - Jitka Tumová
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, Vodňany, Czech Republic
| | - Christoph Steinbach
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, Vodňany, Czech Republic
| | - Oksana Golovko
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, Vodňany, Czech Republic; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), Box 7050, SE-750 07, Uppsala, Sweden
| | - Hans Komen
- Wageningen University, Animal Breeding and Genomics Centre, Wageningen, the Netherlands
| | - Emmanuelle Maillot-Maréchal
- Institut National de l'Environnement Industriel et des Risques (INERIS), Unité d'Ecotoxicologie in vitro et in vivo, UMR-I 02 SEBIO, Verneuil-en-Halatte, France
| | - Jana Máchová
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, Vodňany, Czech Republic
| | - Roman Grabic
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, Vodňany, Czech Republic
| | - Selim Aït-Aïssa
- Institut National de l'Environnement Industriel et des Risques (INERIS), Unité d'Ecotoxicologie in vitro et in vivo, UMR-I 02 SEBIO, Verneuil-en-Halatte, France
| | - Hana Kocour Kroupová
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, Vodňany, Czech Republic.
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Ramos CDO, Macedo DB, Canton APM, Cunha-Silva M, Antonini SRR, Stecchini MF, Seraphim CE, Rodrigues T, Mendonca BB, Latronico AC, Brito VN. Outcomes of Patients with Central Precocious Puberty Due to Loss-of-Function Mutations in the MKRN3 Gene after Treatment with Gonadotropin-Releasing Hormone Analog. Neuroendocrinology 2020; 110:705-713. [PMID: 31671431 DOI: 10.1159/000504446] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 10/30/2019] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Loss-of-function mutation of MKRN3 represents the most frequent genetic cause of familial central precocious puberty (CPP). The outcomes of gonadotropin-releasing hormone analog (GnRHa) treatment in CPP patients with MKRN3 defects are unknown. OBJECTIVE To describe the clinical and hormonal features of patients with CPP with or without MKRN3 mutations after GnRHa treatment. Anthropometric, metabolic and reproductive parameters were evaluated. PATIENTS AND METHODS Twenty-nine female patients with CPP due to loss-of-function mutations in the MKRN3 and 43 female patients with idiopathic CPP were included. Their medical records were retrospectively evaluated for clinical, laboratory, and imaging study, before, during, and after GnRHa treatment. All patients with idiopathic CPP and 11 patients with CPP due to MKRN3 defects reached final height (FH). RESULTS At the diagnosis, there were no significant differences between clinical and laboratory features of patients with CPP with or without MKRN3 mutations. A high prevalence of overweight and obesity was observed in patients with CPP with or without MKRN3 mutations (47.3 and 50%, respectively), followed by a significant reduction after GnRHa treatment. No significant differences in the values of mean FH and target height were found between the 2 CPP groups after GnRHa treatment. Menarche occurred at the expected age in patients with or without CPP due to MKRN3 mutations (11.5 ± 1.3 and 12 ± 0.6 years, respectively). The prevalence of polycystic ovarian syndrome was 9.1% in patients with CPP due to MKRN3 mutations and 5.9% in those with idiopathic CPP. CONCLUSION Anthropometric, metabolic, and reproductive outcomes after GnRHa treatment were comparable in CPP patients, with or without MKRN3 mutations, suggesting the absence of deleterious effects of MKRN3 defects in young female adults' life.
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Affiliation(s)
- Carolina de Oliveira Ramos
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil,
| | - Delanie B Macedo
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil
| | - Ana Pinheiro M Canton
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil
| | - Marina Cunha-Silva
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil
| | - Sonir R R Antonini
- Departamento de Pediatria, Escola de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Monica Freire Stecchini
- Departamento de Pediatria, Escola de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Carlos Eduardo Seraphim
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil
| | - Tania Rodrigues
- Departamento de Medicina, Universidade Federal de Juiz de Fora- Campus Governador Valadares, Governador Valadares, Brazil
| | - Berenice Bilharinho Mendonca
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil
| | - Ana Claudia Latronico
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil
| | - Vinicius Nahime Brito
- Unidade de Endocrinologia do Desenvolvimento, Disciplina de Endocrinologia e Metabologia da Faculdade de Medicina da Universidade de São Paulo e Laboratório de Hormônios e Genética Molecular LIM 42 do Hospital das Clínicas, São Paulo, Brazil
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Chen J, Peng C, Yu Z, Xiao L, Yu Q, Li S, Zhang H, Lin H, Zhang Y. The Administration of Cortisol Induces Female-to-Male Sex Change in the Protogynous Orange-Spotted Grouper, Epinephelus coioides. Front Endocrinol (Lausanne) 2020; 11:12. [PMID: 32082256 PMCID: PMC7005586 DOI: 10.3389/fendo.2020.00012] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/08/2020] [Indexed: 11/13/2022] Open
Abstract
In this study, we injected cortisol into the protogynous orange-spotted grouper (Epinephelus coioides) to investigate the role of this hormone in sex change. Following injection, we evaluated gonadal changes, serum levels of steroid hormones, and sex-related gene expression during the processes of cortisol-induced sex change and cortisol withdrawal in the orange-spotted grouper. Cortisol treatment caused the degeneration of oocytes and induced sex change in a dose-dependent manner. Over the long-term, we observed a significant increase in serum 11-ketotestosterone (11-KT) levels in all cortisol-treated groups, although levels of 17β-estradiol did not change significantly. Consistent with the elevation of serum 11-KT levels, the expression of genes related to testicular development was also significantly up-regulated in the cortisol-treated groups. Based on our results, we propose that cortisol may trigger masculinization by inducing the synthesis of 11-KT and by directly activating the expression of sex-related genes. Furthermore, we found that cortisol-induced sex change was not permanent and could be reversed after the withdrawal of cortisol treatment.
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Affiliation(s)
- Jiaxing Chen
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Cheng Peng
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Zeshu Yu
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ling Xiao
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Qi Yu
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Shuisheng Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Fisheries College, Guangdong Ocean University, Zhanjiang, China
- *Correspondence: Shuisheng Li
| | - Haifa Zhang
- Marine Fisheries Development Center of Guangdong Province, Huizhou, China
| | - Haoran Lin
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Yong Zhang
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Marine Fisheries Development Center of Guangdong Province, Huizhou, China
- Yong Zhang
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Zhu L, Li W, Zha J, Li N, Wang Z. Chronic thiamethoxam exposure impairs the HPG and HPT axes in adult Chinese rare minnow (Gobiocypris rarus): Docking study, hormone levels, histology, and transcriptional responses. Ecotoxicol Environ Saf 2019; 185:109683. [PMID: 31550567 DOI: 10.1016/j.ecoenv.2019.109683] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 09/13/2019] [Accepted: 09/15/2019] [Indexed: 06/10/2023]
Abstract
Thiamethoxam has emerged as an environmental contaminant detected in aqueous environments, and its endocrine-disrupting effect at chronic exposure in teleosts remains unknown. In the present study, a docking experiment and an in vivo test were integrated to systematically explore the toxic mechanisms of thiamethoxam in fish. Histological analysis, plasma VTG and hormone level (E2, 11-KT, T3 and T4) determinations, and HPG and HPT gene expression quantification were performed after Chinese rare minnow (Gobiocypris rarus) was exposed to thiamethoxam (0, 0.5, 5, and 50 μg/L) for 90 days. According to the docking study, thiamethoxam had different interactions with ERα, AR and TRα via hydrogen bonding. A decrease in body length and plasma T4 was observed in both genders. The histological damage in liver and delayed gonadal development were observed in both genders at 50 μg/L thiamethoxam treatment. In males, the following HPG axis genes were upregulated: gnrh and cyp19b in the brain; vtg and cyp19a in the liver; and cyp17 and cyp19a in the gonad. In females, erɑ in the liver was significantly upregulated with 0.5 μg/L thiamethoxam treatment, and cyp17 in the gonad was upregulated with all treatment. The suppression of cyp19a, gnrh, cyp11a, and ttr was observed at the concentration of 5 μg/L in the female liver. Taken together, the endocrine system of Chinese rare minnow might be disrupted after chronic exposure to thiamethoxam.
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Affiliation(s)
- Lifei Zhu
- Beijing Fisheries Research Institute, Beijing, 100068, China
| | - Wei Li
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Jinmiao Zha
- State Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Na Li
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China
| | - Zijian Wang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China
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Sun SX, Zhang YN, Lu DL, Wang WL, Limbu SM, Chen LQ, Zhang ML, Du ZY. Concentration-dependent effects of 17β-estradiol and bisphenol A on lipid deposition, inflammation and antioxidant response in male zebrafish (Danio rerio). Chemosphere 2019; 237:124422. [PMID: 31352104 DOI: 10.1016/j.chemosphere.2019.124422] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/18/2019] [Accepted: 07/20/2019] [Indexed: 06/10/2023]
Abstract
Environmental estrogenic compounds are important pollutants, which are widely distributed in natural water bodies. They produce various adverse effects on fish, but their concentration-dependent toxicities in fish metabolism and health are not fully understood. This study investigated the effects of 17β-estradiol (E2) and bisphenol A (BPA) at low and high concentrations on lipid deposition, inflammation and antioxidant response in male zebrafish. We measured fish growth parameters, gonad development, lipid contents and the activities of inflammatory and antioxidant enzymes, as well as their mRNA expressions. All E2 and BPA concentrations used increased body weight, damaged gonad structure and induced feminization in male zebrafish. The exposure of zebrafish to E2 and BPA promoted lipid accumulation by increasing total fat, liver triglycerides and free fatty acid contents, and also upregulated lipogenic genes expression, although they decreased total cholesterol content. Notably, zebrafish exposed to low concentrations of E2 (200 ng/L) and BPA (100 μg/L) had higher lipid synthesis and deposition compared to high concentrations (2000 ng/L and 2000 μg/L, respectively). However, the high concentrations of E2 and BPA increased inflammation and antioxidant response. Furthermore, BPA caused greater damage to fish gonad development and more severe lipid peroxidation compared to E2. Overall, the results suggest that the toxic effects of E2 and BPA on zebrafish are concentration-dependent such that, the relative low concentrations used induced lipid deposition, whereas the high ones caused adverse effects on inflammation and antioxidant response.
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Affiliation(s)
- Sheng-Xiang Sun
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Yun-Ni Zhang
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Dong-Liang Lu
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Wei-Li Wang
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Samwel Mchele Limbu
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China; Department of Aquatic Sciences and Fisheries Technology, University of Dar as Salaam, Dar es Salaam, Tanzania
| | - Li-Qiao Chen
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Mei-Ling Zhang
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Zhen-Yu Du
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai, 200241, China.
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Rolon S, Huynh C, Guenther M, Gardezi M, Phillips J, Gehrand AL, Raff H. The effects of flutamide on the neonatal rat hypothalamic-pituitary-adrenal and gonadal axes in response to hypoxia. Physiol Rep 2019; 7:e14318. [PMID: 31876126 PMCID: PMC6930936 DOI: 10.14814/phy2.14318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Hypoxia is common with preterm birth and may lead to long-term effects on the adult hypothalamic-pituitary-adrenal (HPA) axis that are sexually dimorphic due to neonatal androgens. Although the adult rat adrenal does not express appreciable CYP17 activity, the neonatal rat adrenal may synthesize androgens that could be a critical local factor in the development of adrenal function. We evaluated these phenomena by pretreating the neonatal rats on postnatal days (PD) 1, 6, 13, 20 with flutamide (a nonsteroidal androgen receptor antagonist) at a standard or a high dose (10 mg/kg or 50 mg/kg) compared to vehicle control. One day later, neonatal rats were exposed to acute hypoxia and blood was sampled. We found that (a) in PD2 pups, flutamide augmented corticosterone responses in a sexually dimorphic pattern and without an increase in ACTH, (b) PD7 and PD14 pups had the smallest corticosterone response to hypoxia (c) PD21 pups had an adult-like corticosterone response to hypoxia that was sexually dimorphic, (d) flutamide attenuated ACTH responses in PD7 hypoxic pups, and (e) high-dose flutamide suppressed the HPA axis, FSH, and estradiol. Flutamide demonstrated mixed antagonist and agonist effects that changed during the first three weeks of neonatal life. We conclude that the use of flutamide in neonatal rats to evaluate androgen-induced programming of subsequent adult behavior is not optimal. However, our studies suggest neonatal androgens play a role in regulation of adrenal function that is sexually dimorphic and changes during early development.
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Affiliation(s)
- Santiago Rolon
- Endocrine Research LaboratoryAurora St. Luke’s Medical CenterAurora Research InstituteMilwaukeeWisconsin
- Department of MedicineMedical College of WisconsinMilwaukeeWisconsin
| | - Christine Huynh
- Endocrine Research LaboratoryAurora St. Luke’s Medical CenterAurora Research InstituteMilwaukeeWisconsin
| | - Maya Guenther
- Endocrine Research LaboratoryAurora St. Luke’s Medical CenterAurora Research InstituteMilwaukeeWisconsin
| | - Minhal Gardezi
- Endocrine Research LaboratoryAurora St. Luke’s Medical CenterAurora Research InstituteMilwaukeeWisconsin
| | - Jonathan Phillips
- Endocrine Research LaboratoryAurora St. Luke’s Medical CenterAurora Research InstituteMilwaukeeWisconsin
| | - Ashley L. Gehrand
- Endocrine Research LaboratoryAurora St. Luke’s Medical CenterAurora Research InstituteMilwaukeeWisconsin
| | - Hershel Raff
- Endocrine Research LaboratoryAurora St. Luke’s Medical CenterAurora Research InstituteMilwaukeeWisconsin
- Department of MedicineMedical College of WisconsinMilwaukeeWisconsin
- Department of SurgeryMedical College of WisconsinMilwaukeeWisconsin
- Department of PhysiologyMedical College of WisconsinMilwaukeeWisconsin
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Rutherford RJ, Lister AL, MacLatchy DL. Physiological effects of 5α-dihydrotestosterone in male mummichog (Fundulus heteroclitus) are dose and time dependent. Aquat Toxicol 2019; 217:105327. [PMID: 31703940 DOI: 10.1016/j.aquatox.2019.105327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 10/01/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
Numerous anthropogenic sources, such as pulp mill and sewage treatment effluents, contain androgenic endocrine disrupting compounds that alter the reproductive status of aquatic organisms. The current study injected adult male mummichog (Fundulus heteroclitus) with 0 (control), 1 pg/g, 1 ng/g or 1 μg/g body weight of the model androgen 5α-dihydrotestosterone (DHT) with the intent to induce a period of plasma sex hormone depression, a previously-observed effect of DHT in fish. A suite of gonadal steroidogenic genes were assessed during sex hormone depression and recovery. Fish were sampled 6, 12, 16, 18, 24, 30 and 36 h post-injection, and sections of testis tissue were either snap frozen immediately or incubated for 24 h at 18 °C to determine in vitro gonadal hormone production and then frozen. Plasma testosterone (T) and 11-ketotestosterone (11KT) were depressed beginning 24 h post-injection. At 36 h post-injection plasma T remained depressed while plasma 11KT had recovered. In snap frozen tissue there was a correlation between plasma sex hormone depression and downregulation of key steroidogenic genes including steroidogenic acute regulatory protein (star), cytochrome P450 17a1 (cyp17a1), 3β-hydroxysteroid dehydrogenase (3βhsd), 11β-hydroxysteroid dehydrogenase (11βhsd) and 17β-hydroxysteroid dehydrogenase (17βhsd). Similar to previous studies, 3βhsd was the first and most responsive gene during DHT exposure. Gene responses from in vitro tissue were more variable and included the upregulation of 3βhsd, 11βhsd and star during the period of hormone depression. The differential expression of steroidogenic genes from the in vitro testes compared to the snap frozen tissues may be due to the lack of regulators from the hypothalamo-pituitary-gonadal axis present in whole-animal systems. Due to these findings it is recommended to use snap frozen tissue, not post-incubation tissue from in vitro analysis, for gonadal steroidogenic gene expression to more accurately reflect in vivo responses.
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Affiliation(s)
- Robert J Rutherford
- Department of Biology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON, N2L 3C5, Canada.
| | - Andrea L Lister
- Department of Biology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON, N2L 3C5, Canada
| | - Deborah L MacLatchy
- Department of Biology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON, N2L 3C5, Canada
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Calado SLDM, Vicentini M, Santos GS, Pelanda A, Santos H, Coral LA, Magalhães VDF, Mela M, Cestari MM, Silva de Assis HC. Sublethal effects of microcystin-LR in the exposure and depuration time in a neotropical fish: Multibiomarker approach. Ecotoxicol Environ Saf 2019; 183:109527. [PMID: 31400723 DOI: 10.1016/j.ecoenv.2019.109527] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/30/2019] [Accepted: 08/01/2019] [Indexed: 06/10/2023]
Abstract
Eutrophication is an ecological process that results in cyanobacterial blooms. Microcystin-LR is the most toxic variant of microcystins and may cause toxic effects in the organisms, mainly in hepatic tissues. The aims of this study were to use multiple biomarkers in order to evaluate the sublethal effects of a low concentration of MC-LR (1 μg/L) in fish Geophagus brasiliensis by waterborne exposure; and evaluate the depuration of this toxin during 15 days. A group of 30 fish was exposed to 1 μg/L of MC-LR solution for 96 h in a static bioassay. After this time, blood, brain, muscle, liver, gonad and gills were collected from half of the exposed fish group in order to evaluate chemical, biochemical, histological and genotoxic biomarkers. The rest of the fish group was submitted to the depuration experiment with free MC-LR water for 15 days. After this time the same tissues were collected and evaluated using biomarkers analysis. Toxic effects were found mostly in the fish liver from depuration time as alterations on the antioxidant system and histopathologies. The results showed that even low concentrations can cause sublethal effects to aquatic organisms, and cyanotoxins monitoring and regulation tools are required.
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Affiliation(s)
- Sabrina Loise de Morais Calado
- Ecology and Conservation Program Post-Graduation, Federal University of Paraná, PO Box 19031, 81530-990, Curitiba-PR, Brazil.
| | - Maiara Vicentini
- Ecology and Conservation Program Post-Graduation, Federal University of Paraná, PO Box 19031, 81530-990, Curitiba-PR, Brazil.
| | - Gustavo Souza Santos
- Department of Genetics, Federal University of Paraná, PO Box 19031, 81530-990, Curitiba-PR, Brazil.
| | - Ana Pelanda
- Department of Pharmacology, Federal University of Paraná, PO Box 19031, 81530-990, Curitiba-PR, Brazil.
| | - Hayanna Santos
- Department of Pharmacology, Federal University of Paraná, PO Box 19031, 81530-990, Curitiba-PR, Brazil.
| | - Lucila Andriani Coral
- Department of Chemistry and Biology, Federal Technical University of Paraná, 81280-340, Curitiba-PR, Brazil.
| | | | - Maritana Mela
- Department of Cell Biology, Federal University of Paraná, PO Box 19031, 81530-990, Curitiba-PR, Brazil.
| | - Marta Margarete Cestari
- Department of Genetics, Federal University of Paraná, PO Box 19031, 81530-990, Curitiba-PR, Brazil.
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Ikert H, Craig PM. Chronic exposure to venlafaxine and increased water temperature reversibly alters microRNA in zebrafish gonads (Danio rerio). Comp Biochem Physiol Part D Genomics Proteomics 2019; 33:100634. [PMID: 31715506 DOI: 10.1016/j.cbd.2019.100634] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 10/09/2019] [Accepted: 10/12/2019] [Indexed: 01/28/2023]
Abstract
MicroRNA (miRNA) are short, non-coding RNA that act by downregulating targeted mRNA transcripts. Only recently have they been used as endpoints in studies of aquatic toxicology. The purpose of this study was to determine the effect of an antidepressant contaminant, venlafaxine (VFX), and increased temperature on specific microRNA levels in zebrafish (Danio rerio) reproductive tissue. Adult zebrafish were exposed to one of four conditions; control, 1 μg/L VFX (VFX), 32 °C (Temp), or 1 μg/L VFX + 32 °C (VFX & Temp) for 21 days. Half of the fish were returned to control conditions for a 21-day recovery period. RT-qPCR was performed to measure relative abundances of several miRNAs known to respond to antidepressant exposure: dre-miR-22b-3p, dre-miR-301a, dre-miR-140-5p, dre-let-7d-5p, dre-miR-210-5p, and dre-miR-457b-5p. After the exposure period, dre-miR-22b-3p and dre-miR-301a showed a significant downregulation in response to all treatments. In contrast, after the recovery period, there were no significant differences in microRNA abundance. These altered microRNA are predicted to target several genes, including phosphofructokinase, and are associated with ovarian pathologies. Combined, we have shown that VFX and increased water temperature alter miRNA abundances in zebrafish reproductive tissue, an effect correlated with a functional stress response and cell cycle dysregulation.
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Affiliation(s)
- Heather Ikert
- Department of Biology, University of Waterloo, 200 University Ave. W., Waterloo, Ontario N2L 3G1, Canada.
| | - Paul M Craig
- Department of Biology, University of Waterloo, 200 University Ave. W., Waterloo, Ontario N2L 3G1, Canada.
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Guo H, Chen LL, Li GL, Deng SP, Zhu CH. Accumulation and Depuration of Nonylphenol and Its Effect on the Expressions of Vitellogenin and Vitellogenin Receptor in Freshwater Prawn Macrobrachium rosenbergii. Bull Environ Contam Toxicol 2019; 103:729-733. [PMID: 31531704 DOI: 10.1007/s00128-019-02714-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 09/05/2019] [Indexed: 06/10/2023]
Abstract
Accumulation of nonylphenol (NP) in hepatopancreas, gonad, eyestalk, and muscle of freshwater prawn Macrobrachium rosenbergii following 72 h exposure to 100 µg/L NP, and depuration of NP in these tissues at 0.5-192 h post exposure were examined. We also examined the expressions of vitellogenin (Vg) and vitellogenin receptor (VgR) of prawn following 0-20 days exposure to 0, 1, 10, and 100 µg/L NP. NP accumulation in hepatopancreas and gonad with high concentration, and low concentration in muscle, but depurated faster in eyestalk and muscle. The expressions of vitellogenin (Vg) and vitellogenin receptor (VgR) increased directly with dose and time. In conclusion, NP accumulated significantly in gonad together with high Vg and VgR expressions, and depurated slow in hepatopancreas and gonad when prawns were removed back to control water. The induction of Vg and VgR under NP exposure might be a stress response in M. rosenbergii.
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Affiliation(s)
- Hui Guo
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, College of Fisheries, Guangdong Ocean University, Mazhang District, Haida Road No. 1, Zhanjiang, 524025, Guangdong, People's Republic of China
| | - Luan-Luan Chen
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, College of Fisheries, Guangdong Ocean University, Mazhang District, Haida Road No. 1, Zhanjiang, 524025, Guangdong, People's Republic of China
| | - Guang-Li Li
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, College of Fisheries, Guangdong Ocean University, Mazhang District, Haida Road No. 1, Zhanjiang, 524025, Guangdong, People's Republic of China
| | - Si-Ping Deng
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, College of Fisheries, Guangdong Ocean University, Mazhang District, Haida Road No. 1, Zhanjiang, 524025, Guangdong, People's Republic of China
| | - Chun-Hua Zhu
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, College of Fisheries, Guangdong Ocean University, Mazhang District, Haida Road No. 1, Zhanjiang, 524025, Guangdong, People's Republic of China.
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70
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Xia X, Wang P, Wan R, Chang Z, Du Q. Progesterone affects sex differentiation and alters transcriptional of genes along circadian rhythm signaling and hypothalamic-pituitary-gonadal axes in juvenile Yellow River Carp (Cyprinus carpio var.). Environ Toxicol 2019; 34:1255-1262. [PMID: 31298479 DOI: 10.1002/tox.22826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/14/2019] [Accepted: 06/26/2019] [Indexed: 06/10/2023]
Abstract
Progesterone (P4) is a biologically active steroid hormone that is involved in the regulation of oocyte growth and maturation, as well as development of the endometrium and implantation in the uterus of humans. It can also stimulate oocyte maturation in female fish, as well as spermatogenesis and sperm motility in male fish. Thus, P4 has been extensively used in human and animal husbandry as a typical progestin. However, P4 remaining in the water environment will pose a potential hazard to aquatic organisms. For example, it can interfere with sex differentiation and reproduction in aquatic vertebrates such as fish. Therefore, we investigated the effects of prolonged progesterone exposure on the expression of genes related to circadian rhythm signaling and the hypothalamic-pituitary-gonadal (HPG) axes in Yellow River Carp, which may have a potential impact on their sex differentiation. Our results suggested that P4 exposure altered the expression of genes related to circadian rhythm signaling, which can lead to disorders in the endocrine system and regulate the HPG axes-related activities. Furthermore, the expression of genes related to the HPG axes was also altered, which might affect gonadal development and the reproductive systems of Yellow River Carp. In addition, these changes may provide a plausible mechanism for the observed shifts in their sex ratio toward females.
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Affiliation(s)
- Xiaohua Xia
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Peijin Wang
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Ruyan Wan
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Zhongjie Chang
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Qiyan Du
- College of Life Science, Henan Normal University, Xinxiang, China
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71
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Forner-Piquer I, Fakriadis I, Mylonas CC, Piscitelli F, Di Marzo V, Maradonna F, Calduch-Giner J, Pérez-Sánchez J, Carnevali O. Effects of Dietary Bisphenol A on the Reproductive Function of Gilthead Sea Bream ( Sparus aurata) Testes. Int J Mol Sci 2019; 20:ijms20205003. [PMID: 31658598 PMCID: PMC6835794 DOI: 10.3390/ijms20205003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/03/2019] [Accepted: 10/05/2019] [Indexed: 12/14/2022] Open
Abstract
Bisphenol A (BPA), a known endocrine disrupting chemical (EDC), was administered by diet to gilthead sea bream (Sparus aurata) in order to study its effects on the endocannabinoid system (ECS) and gonadal steroidogenesis. 2-year-old male gilthead sea bream were fed with two different concentrations of BPA (LOW at 4 and HIGH at 4000 µg/kg body weight for 21 days during the reproductive season. Exposure to 4000 µg BPA/kg bw/day (BPA HIGH) reduced sperm motility and altered the straight-line velocity (VSL) and linearity (LIN). Effects on steroidogenesis were evident, with testosterone (T) being up-regulated by both treatments and 11-ketotestosterone (11-KT) down-regulated by BPA HIGH. Plasma levels of 17β-estradiol (E2) were not affected. The Gonadosomatic Index (GSI) increased in the BPA HIGH group. Interestingly, the levels of endocannabinoids and endocannabinoid-like compounds were significantly reduced after both treatments. Unpredictably, a few changes were noticed in the expression of genes coding for ECS enzymes, while the receptors were up-regulated depending on the BPA dose. Reproductive markers in testis (leptin receptor (lepr), estrogen receptors (era, erb), progesterone receptors (pr) and the gonadotropin releasing hormone receptor (gnrhr)) were up-regulated. BPA induced the up-regulation of the hepatic genes involved in oogenesis (vitellogenin (vtg) and zona pellucida 1 (zp1)).
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Affiliation(s)
- Isabel Forner-Piquer
- Dipartimento Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
| | - Ioannis Fakriadis
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Center for Marine Research, P.O. Box 2214, Heraklion, 71003 Crete, Greece.
| | - Constantinos C Mylonas
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Center for Marine Research, P.O. Box 2214, Heraklion, 71003 Crete, Greece.
| | - Fabiana Piscitelli
- Endocannabinoid Research Group, Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei, 80078 Pozzuoli, Italy.
| | - Vincenzo Di Marzo
- Endocannabinoid Research Group, Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei, 80078 Pozzuoli, Italy.
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health, Université Laval, Quebec City, QC G1V 0A6, Canada.
| | - Francesca Maradonna
- Dipartimento Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
| | - Josep Calduch-Giner
- Nutrigenomics and Fish Endocrinology Group, Institute of Aquaculture Torre de la Sal (IATS-CSIC), 12595 Ribera de Cabanes, Castellón, Spain.
| | - Jaume Pérez-Sánchez
- Nutrigenomics and Fish Endocrinology Group, Institute of Aquaculture Torre de la Sal (IATS-CSIC), 12595 Ribera de Cabanes, Castellón, Spain.
| | - Oliana Carnevali
- Dipartimento Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
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72
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Palma P, Nocillado J, Superio J, de Jesus-Ayson EG, Ayson F, Takemura A, Lu MW, Elizur A. Induction of Gonadal Development in Protogynous Grouper with Orally Delivered FSH DNA. Mar Biotechnol (NY) 2019; 21:697-706. [PMID: 31372794 DOI: 10.1007/s10126-019-09914-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 07/17/2019] [Indexed: 06/10/2023]
Abstract
The availability of sexually mature fish often dictates the success of its captive breeding. In this study, we induced reproductive development in juvenile protogynous tiger grouper through oral administration of a plasmid (p) containing an engineered follicle-stimulating hormone (FSH). An expression construct (pcDNA3.1) was designed to express a single-chain FSH consisting of giant grouper FSH β-subunit and glycoprotein subunit-α (CGα), linked by the carboxy-terminal peptide (CTP) sequence from the human chorionic gonadotropin (hCG). Single oral delivery of pFSH encapsulated in liposome and chitosan to tiger grouper yielded a significant increase in plasma FSH protein level after 4 days. Weekly pFSH feeding of juvenile tiger groupers for 8 weeks stimulated ovarian development as indicated by a significant increase in oocyte diameter and progression of oocytes to cortical alveolar stage. As the pFSH treatment progressed from 20 to 38 weeks, female to male sex change was initiated, characterized by oocyte regression, proliferation of spermatogonial cells, and occurrence of spermatogenic cysts. It was also associated with significantly lower mRNA expression of steroidogenic genes (cyp11b, cyp19a1a, and foxl2) and basal plasma levels of sex steroid hormones 17β-estradiol (E2), testosterone (T), and 11-ketotestosterone (11KT). Results suggest that pFSH stimulates ovarian development up to cortical alveolar stage and then initiates sex change in tiger grouper. These findings significantly contribute to our knowledge on the role of FSH in the development of protogynous hermaphroditic fish. This study is the first to demonstrate induction of reproductive development in fish through oral delivery of plasmid gonadotropin.
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Affiliation(s)
- Peter Palma
- Genecology Research Centre, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia
- Aquaculture Department, Southeast Asian Fisheries Development Center (SEAFDEC/AQD), Tigbauan, 5021, Iloilo, Philippines
| | - Josephine Nocillado
- Genecology Research Centre, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia
| | - Joshua Superio
- Aquaculture Department, Southeast Asian Fisheries Development Center (SEAFDEC/AQD), Tigbauan, 5021, Iloilo, Philippines
| | - Evelyn Grace de Jesus-Ayson
- Aquaculture Department, Southeast Asian Fisheries Development Center (SEAFDEC/AQD), Tigbauan, 5021, Iloilo, Philippines
| | - Felix Ayson
- Aquaculture Department, Southeast Asian Fisheries Development Center (SEAFDEC/AQD), Tigbauan, 5021, Iloilo, Philippines
| | - Akihiro Takemura
- Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, 3422 Sesoko, Motobu, Okinawa, 905-0227, Japan
| | - Ming Wei Lu
- Department of Aquaculture, National Taiwan Ocean University, Keelung City, 202, Taiwan
| | - Abigail Elizur
- Genecology Research Centre, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia.
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73
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Cai J, Li L, Song L, Xie L, Luo F, Sun S, Chakraborty T, Zhou L, Wang D. Effects of long term antiprogestine mifepristone (RU486) exposure on sexually dimorphic lncRNA expression and gonadal masculinization in Nile tilapia (Oreochromis niloticus). Aquat Toxicol 2019; 215:105289. [PMID: 31491707 DOI: 10.1016/j.aquatox.2019.105289] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 08/27/2019] [Accepted: 08/27/2019] [Indexed: 06/10/2023]
Abstract
Mifepristone (RU486), a clinical abortion agent and potential endocrine disruptor, binds to progestin and glucocorticoid receptors and has multiple functional importance in reproductive physiology. A long-term exposure of RU486 resulted in masculinization of female fish, however, the epigenetic landscape remains elusive. Recent studies demonstrated that long non-coding RNAs (lncRNAs) might play potential roles in epigenetic modulation of sex differentiation, ovarian cancer and germline stem cell survival. To further understand the influence of RU486 exposure on epigenetic regulation, we performed a comparative investigation on sex-biased gonadal lncRNAs profiles using control XX/XY and RU486-induced sex reversed XX Nile tilapia (Oreochromis niloticus) by RNA-seq. In total, 962 sexually differentially expressed lncRNAs and their target genes were screened from the gonads of control and sex reversed fish. In comparison with the control XX group, sex reversal induced by RU486 treatment led to significant up-regulation of 757 lncRNAs and down-regulation of 221 lncRNAs. Hierarchical clustering analysis revealed that global lncRNA expression profiles in RU486-treated XX group clustered into the same branch with the control XY, whereas XX control group formed a separate branch. The KEGG pathway enrichment analysis showed that the cis-target genes between RU486-XX and control-XX were concentrated in NOD - like receptor signaling pathway, Cell adhesion molecules (CAMs) and Biosynthesis of amino acids. Real-time PCR and in situ hybridization experiments demonstrate that lncRNAs showing intense fluctuation during RU486 treatment are also sexually dimorphic during early sex differentiation, which further proves the intimate relationship between lncRNAs and sex differentiation and sexual transdifferentiation. Taken together, our data strongly indicates that a long-term exposure of RU486 resulted in sex reversal of XX female fish and the altered expression of sexually dimorphic lncRNAs might partially account for the sex reversal via epigenetic modification.
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Affiliation(s)
- Jing Cai
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China; High School of Tongnan, Tongnan, Chongqing, 402660, China
| | - Lu Li
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Lingyun Song
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Lang Xie
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Feng Luo
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China; Experimental High School of Fuling, Chongqing, 400800, China
| | - Shaohua Sun
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Tapas Chakraborty
- South Ehime Fisheries Research Center, Ehime University, 798-4206, Japan.
| | - Linyan Zhou
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China.
| | - Deshou Wang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, 400715, China.
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74
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Dang Z, Kienzler A. Changes in fish sex ratio as a basis for regulating endocrine disruptors. Environ Int 2019; 130:104928. [PMID: 31277008 DOI: 10.1016/j.envint.2019.104928] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/06/2019] [Accepted: 06/12/2019] [Indexed: 06/09/2023]
Abstract
Fish sex ratio (SR) is an endpoint potentially indicating both endocrine activity and adversity, essential elements for identifying Endocrine Disrupting Chemicals (EDCs) as required by the EU regulations. Due to different protocols and methods in the literature studies, SR data vary greatly. This study analyses literature SR data and discusses important considerations for using SR data in the regulatory context for the hazard identification, classification, PBT (persistent, bioaccumulative and toxic) assessment, testing, and risk assessment. A total number of 106 studies were compiled for SR of zebrafish, medaka and fathead minnow exposed to 84 chemicals or mixtures. About 53% of literature studies determined SR by methods different from the standard histology method, leading to uncertainty of quantifying SR and differential sensitivity. SR was determined after depuration in 40 papers, which may lead to chemical-induced SR changes reversible to the control. SR was responsive to chemicals with EAS (estrogen, androgen, steoroidogenesis) activity and also to those with thyroid and progesterone activity. Besides, SR was influenced by non-chemical factors, e.g., inbreeding and temperature, leading to difficulty in data interpretation. The ECHA/EFSA/JRC Guidance suggests that SR and gonad histology data can be used for identifying EDCs. Due to reversibility, influence of confounding factors, and responsiveness to chemicals with endocrine activity other than EAS, this study suggests that SR/gonad histology should be combined with certain mode of action evidence for identifying EDCs. Important considerations for using SR data in the identification, classification, PBT assessment, testing, and risk assessment are discussed.
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Affiliation(s)
- ZhiChao Dang
- National Institute for Public Health and the Environment (RIVM), A. van Leeuwenhoeklaan 9, Bilthoven, the Netherlands.
| | - Aude Kienzler
- European Commission, Joint Research Centre (JRC), Via Enrico Fermi, 2749, 21027 Ispra, Italy
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75
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Mabansag CJA, Paraso MGV, Marcelino RT, Clavecillas AA, Lola MSEG. A Preliminary Survey of Estrogenic Effects in Cultured Adult Male Nile Tilapia (Oreochromis niloticus) in the Seven Lakes of San Pablo City, Philippines. Bull Environ Contam Toxicol 2019; 103:400-404. [PMID: 31352602 DOI: 10.1007/s00128-019-02685-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 07/23/2019] [Indexed: 06/10/2023]
Abstract
This study aimed to investigate the impact of estrogenic endocrine disruptors in adult male Nile Tilapia (Oreochromis niloticus) from the Seven Lakes (Bunot, Calibato, Mohicap, Palakpakin, Pandin, Sampaloc and Yambo) of San Pablo City in Laguna, Philippines. Fish were collected from aquaculture operations in each lake from July to September 2017 and examined for plasma vitellogenin (VTG) levels, hepatosomatic index (HSI) and gonadosomatic index (GSI). In comparison to the reference group (Pandin Lake), fish from Mohicap, Sampaloc and Yambo had higher levels of plasma VTG. HSI was increased in fish from Bunot Lake while it was markedly reduced in fish from Sampaloc Lake. Comparable GSI were obtained in all samples. While most examined fish are in active spermatogenesis, fish from Sampaloc Lake had immature gonads with no spermatozoa, and with minimal to moderate Leydig cell vacuolation and hyperplasia. The results suggest that cultured Nile tilapia from Sampaloc Lake is most adversely affected by endocrine-active compounds. The identification and quantification of these chemicals are recommended in future studies.
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Affiliation(s)
- Clau John A Mabansag
- Department of Basic Veterinary Sciences, College of Veterinary Medicine, University of the Philippines Los Baños, 4031, Los Baños, Laguna, Philippines
| | - Michelle Grace V Paraso
- Department of Basic Veterinary Sciences, College of Veterinary Medicine, University of the Philippines Los Baños, 4031, Los Baños, Laguna, Philippines.
| | - Rocky T Marcelino
- Institute of Statistics, College of Arts and Sciences, University of the Philippines Los Baños, 4031, Los Baños, Laguna, Philippines
| | - Angelo A Clavecillas
- Department of Veterinary Paraclinical Sciences, College of Veterinary Medicine, University of the Philippines Los Baños, 4031, Los Baños, Laguna, Philippines
| | - Ma Suzanneth Epifania G Lola
- Department of Veterinary Paraclinical Sciences, College of Veterinary Medicine, University of the Philippines Los Baños, 4031, Los Baños, Laguna, Philippines
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76
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Abu El Einin HM, Ali RE, Gad El-Karim RM, Youssef AA, Abdel-Hamid H, Habib MR. Biomphalaria alexandrina: a model organism for assessing the endocrine disrupting effect of 17β-estradiol. Environ Sci Pollut Res Int 2019; 26:23328-23336. [PMID: 31197669 DOI: 10.1007/s11356-019-05586-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 05/27/2019] [Indexed: 06/09/2023]
Abstract
A wide range of endocrine disruptor compounds are routinely discharged to the ecosystem. Water contaminated with these compounds has a potential effect on the reproductive physiology of aquatic organisms as well as humans. In the present study, we tested the effect of the steroid estrogen, 17β-estradiol, on Biomphalaria alexandrina, a snail species that is widely distributed in Egypt and that acts as an intermediate host for the human blood fluke, Schistosoma mansoni. The effects of exposure to 0.3 mg/L and 1 mg/L 17β-estradiol on fecundity (MX) and reproductive rate (R0) of B. alexandrina were recorded. In addition, levels of steroid sex hormones and antioxidants in the hemolymph and ovotestis (OT) of exposed snails were measured. Histopathological changes in the OT of B. alexandrina were also investigated. Exposure to 0.3 mg/L and 1 mg/L 17β-estradiol caused a significant increase in the number of egg masses per snail after 3 weeks and 1 week of exposure for the two tested concentrations compared with unexposed controls. An increase in the levels of progesterone hormone was recorded in the hemolymph of exposed snails in comparison with unexposed controls. Additionally, levels of the antioxidant enzyme glutathione (GSH) were increased in the hemolymph and OT tissues of snails after 2 and 4 weeks of exposure. Histopathological sections in the OT revealed an increase in the oocyte and a decrease in the sperm densities after 2 weeks and this effect was restored to normal conditions after 4 weeks of exposure to both tested concentrations. The current results indicate that B. alexandrina is sensitive to 17β-estradiol and can therefore be used as bioindicator and model organism for the assessment of water pollution with endocrine disruptor compounds.
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Affiliation(s)
- Hanaa M Abu El Einin
- Medical Malacology Laboratory, Theodor Bilharz Research Institute, Giza, 12411, Egypt
| | - Rasha E Ali
- Medical Malacology Laboratory, Theodor Bilharz Research Institute, Giza, 12411, Egypt
| | - Rasha M Gad El-Karim
- Medical Malacology Laboratory, Theodor Bilharz Research Institute, Giza, 12411, Egypt
| | - Alaa A Youssef
- Medical Malacology Laboratory, Theodor Bilharz Research Institute, Giza, 12411, Egypt
| | - Hoda Abdel-Hamid
- Medical Malacology Laboratory, Theodor Bilharz Research Institute, Giza, 12411, Egypt
| | - Mohamed R Habib
- Medical Malacology Laboratory, Theodor Bilharz Research Institute, Giza, 12411, Egypt.
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77
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Wang S, Guo QS, Shi HZ, Lu X, Chen PP, Zhang HN, Yan XL. [Effects of 17β-E2 on growth and gonad development of overwintering Whitmania pigra]. Zhongguo Zhong Yao Za Zhi 2019; 44:3239-3245. [PMID: 31602878 DOI: 10.19540/j.cnki.cjcmm.20190527.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The present study was conducted to explores the effects of short-term addition of 17β-E2 on the growth,gonad development and internal quality of overwintering Whitmania pigra. Before overwintering,0. 0,1. 0,10. 0,25. 0,50. 0,100. 0 μg·L~(-1) of 17β-E2 were added to the aquaculture water for 6 weeks and then hibernated for 60 days. The changes of growth performance,gonad index,morphological structure of spermary( ovary),endogenous steroid hormones level and internal quality were measured. The results showed that the body weight,weight gain rate,specific growth rate,female gonad index,oocyte development and endogenous estrogen level of the leech increased first and then decreased with the increase of the concentration of exogenous 17β-E2,which were higher than those of the control group. The body weight,weight gain rate and specific growth rate of the leech at the concentration of 25 μg·L~(-1)17β-E2 were significantly higher than those of the other groups( P<0. 05),oocyte development and endogenous estrogen levels were significantly higher than those of other groups at the concentration of 50 μg·L~(-1)( P<0. 05). When the concentration of exogenous 17β-E2 was higher than 50 μg·L~(-1),the levels of male gonad index,spermatocyte development,endogenous androgen and progesterone were significantly inhibited( P< 0. 05). There was no significant difference in endogenous corticosteroid levels among the groups. In conclusion,short-term addition of exogenous 17β-E2 of 10-25 μg·L~(-1) could promote the growth of overwintering leeches,oocyte development and antithrombin activity without inhibiting the development of male gonads.
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Affiliation(s)
- Shuai Wang
- Institute of China Medicinal Materials,Nanjing Agricultural University Nanjing 210095,China
| | - Qiao-Sheng Guo
- Institute of China Medicinal Materials,Nanjing Agricultural University Nanjing 210095,China
| | - Hong-Zhuan Shi
- Institute of China Medicinal Materials,Nanjing Agricultural University Nanjing 210095,China
| | - Xin Lu
- Institute of China Medicinal Materials,Nanjing Agricultural University Nanjing 210095,China
| | - Pan-Pan Chen
- Institute of China Medicinal Materials,Nanjing Agricultural University Nanjing 210095,China
| | - Hui-Ning Zhang
- Institute of China Medicinal Materials,Nanjing Agricultural University Nanjing 210095,China
| | - Xiao-Lu Yan
- Institute of China Medicinal Materials,Nanjing Agricultural University Nanjing 210095,China
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Duroudier N, Markaide P, Cajaraville MP, Bilbao E. Season influences the transcriptomic effects of dietary exposure to PVP/PEI coated Ag nanoparticles on mussels Mytilus galloprovincialis. Comp Biochem Physiol C Toxicol Pharmacol 2019; 222:19-30. [PMID: 30940556 DOI: 10.1016/j.cbpc.2019.03.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/25/2019] [Accepted: 03/27/2019] [Indexed: 12/17/2022]
Abstract
Toxicity of AgNPs has been widely studied in waterborne exposed aquatic organisms. However, toxic effects caused by AgNPs ingested through the diet and depending on the season are still unexplored. The first cell response after exposure to xenobiotics occurs at gene transcription level. Thus, the aim of this study was to assess transcription level effects in the digestive gland of female mussels after dietary exposure to AgNPs both in autumn and in spring. Mussels were fed daily for 21 days with Isochrysis galbana microalgae previously exposed for 24 h to a dose close to environmentally relevant concentrations of 1 μg Ag/L PVP/PEI coated 5 nm AgNPs (in spring) and to a higher dose of 10 μg Ag/L of the same AgNPs both in autumn and in spring. After 1 and 21 days, mussels RNA was hybridized in a custom microarray containing 7806 annotated genes. Mussels were more responsive to the high dose compared to the low dose of AgNPs and a higher number of probes were altered in autumn than in spring. In both seasons, significantly regulated genes were involved in the cytoskeleton and lipid transport and metabolism COG categories, among others, while genes involved in carbohydrate transport and metabolism were specifically altered in autumn. Overall, transcription patterns were differently altered depending on the exposure time and season, indicating that season should be considered in ecotoxicological studies of metal nanoparticles in mussels.
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Affiliation(s)
- Nerea Duroudier
- CBET Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology, Research Centre for Experimental Marine Biology and Biotechnology PiE, University of the Basque Country (UPV/EHU), Basque Country, Spain
| | - Pablo Markaide
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Basque Country, Spain
| | - Miren P Cajaraville
- CBET Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology, Research Centre for Experimental Marine Biology and Biotechnology PiE, University of the Basque Country (UPV/EHU), Basque Country, Spain
| | - Eider Bilbao
- CBET Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology, Research Centre for Experimental Marine Biology and Biotechnology PiE, University of the Basque Country (UPV/EHU), Basque Country, Spain.
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Scaia MF, de Gregorio LS, Franco-Belussi L, Succi-Domingues M, de Oliveira C. Gonadal, body color, and genotoxic alterations in Lithobates catesbeianus tadpoles exposed to nonylphenol. Environ Sci Pollut Res Int 2019; 26:22209-22219. [PMID: 31152429 DOI: 10.1007/s11356-019-05403-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 05/06/2019] [Indexed: 06/09/2023]
Abstract
Endocrine disrupting chemicals are one of the most important factors contributing to worldwide amphibian decline. The 4-nonylphenol (NP) is a degradation product of several compounds, such as detergents and pesticides, affecting the aquatic environment. Here, we test whether treatment with NP has an effect on developing ovarian tissue, nuclear abnormalities in erythrocytes, and body darkness in pre-metamorphic tadpoles of the bullfrog Lithobates catesbeianus. Tadpoles were exposed for 14 days to three different concentrations of NP (1, 10, and 100 μg/L) besides the control group, which was maintained only with water. After determining body coloration, animals were euthanized and gonads and blood were collected and processed for histology and genotoxic analysis. Even though most animals were females, intersex tadpoles were observed in control and treated groups and there were no males in any group. The highest concentration of NP showed an increase in atretic oocytes, but the area corresponding to somatic compartment and early and late germ cells were not affected. Furthermore, all treated groups presented higher amount of nuclear abnormalities in erythrocytes and body darkening when compared with the control group. These results suggest that NP causes genetic damage and morphological alterations in L. catesbeianus tadpoles by disrupting oogenesis, inducing genotoxicity and increasing body coloration. Its effects on gonadal development could cause future impairments in reproduction, while its deleterious effects on genotoxicity and body pigmentation could be used as a biomarker of effect to this compound.
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Affiliation(s)
- María Florencia Scaia
- Post-graduate Program in Animal Biology, Department of Biology, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, 15054-000, Brazil
- Instituto de Biodiversidad y Biología Experimental y Aplicada-CONICET, C1428EGA, Autonomous City of Buenos Aires, Argentina
- Laboratorio de Neuroendocrinología y Comportamiento, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1428EGA, Autonomous City of Buenos Aires, Argentina
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Bairro: Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil
| | - Lara Salgueiro de Gregorio
- Post-graduate Program in Animal Biology, Department of Biology, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, 15054-000, Brazil
| | - Lilian Franco-Belussi
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Bairro: Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil.
- Instituto de Biociências (InBio), Universidade Federal de Mato Grosso do Sul UFMS, Campo Grande, Brazil.
| | - Maysa Succi-Domingues
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Bairro: Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil
| | - Classius de Oliveira
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Bairro: Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil
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Xiang D, Zhong L, Shen S, Song Z, Zhu G, Wang M, Wang Q, Zhou B. Chronic exposure to environmental levels of cis-bifenthrin: Enantioselectivity and reproductive effects on zebrafish (Danio rerio). Environ Pollut 2019; 251:175-184. [PMID: 31078089 DOI: 10.1016/j.envpol.2019.04.089] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/07/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
Synthetic pyrethroids (SPs) are broadly used to control pests and have been widely detected in aquatic environments, prompting concern over its risk to the health of non-target organisms. The present study evaluated whether long-term (60 d) exposure to low doses (0, 20, 100, and 500 ng/L) of cis-BF enantiomers (1S-cis-BF and 1R-cis-BF) could cause reproductive endocrine disturbance to zebrafish. Exposure to 1S-cis-BF has stronger reproductive impairment effect than 1R-enantiomer, indicating that the enantioselectivity of cis-BF on fish reproduction. Significant decrease of cumulative spawning of zebrafish was observed as a result of cis-BF exposure. And the retardations of testis and ovaries development found in histopathological section were suggested to be important cause for the decreased fecundity. Cis-BF decreased the total motility of sperm but did not affect sperm density. Relatively high levels of cis-BF detected in the gonads of males and females may directly impair gametogenesis. In addition, alterations in the expression of key genes (cyp17, cyp19a and 17β-hsd) associated with reproductive endocrine pathways were correlated well with the significant changes in sex hormone contents (E2 and T) and these results may relate to gonadal development and maturation of germ cells in females or/and males which were suspected to be a likely underlying mechanism. Furthermore, the reduction of quality of F1 embryo derived from the unexposed females and exposed males (UE♀ × E♂) demonstrated that male exposure had greater adverse effects on offspring. Our results indicate that long term, low dose exposure to cis-BF can enantioselectively impair the reproduction system of fish, and induce toxicity related abnormalities in non-exposed offspring. This study has important implications for environmental risk assessment of chiral pesticides that are concurrently present in aquatic systems.
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Affiliation(s)
- Dandan Xiang
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR China; Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (MOA), Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, 510640, PR China
| | - Linxi Zhong
- Qiushi College of Zhenjiang University, Hangzhou, 310058, PR China
| | - Shuyuan Shen
- Qiushi College of Zhenjiang University, Hangzhou, 310058, PR China
| | - Zhuoying Song
- Qiushi College of Zhenjiang University, Hangzhou, 310058, PR China
| | - Guonian Zhu
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR China
| | - Mengcen Wang
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR China
| | - Qiangwei Wang
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR China.
| | - Bingsheng Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
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Rozenblut-Kościsty B, Ogielska M, Hahn J, Kleemann D, Kossakowski R, Tamschick S, Schöning V, Krüger A, Lutz I, Lymberakis P, Kloas W, Stöck M. Impacts of the synthetic androgen Trenbolone on gonad differentiation and development - comparisons between three deeply diverged anuran families. Sci Rep 2019; 9:9623. [PMID: 31270347 PMCID: PMC6610071 DOI: 10.1038/s41598-019-45985-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 06/20/2019] [Indexed: 11/25/2022] Open
Abstract
Using a recently developed approach for testing endocrine disruptive chemicals (EDCs) in amphibians, comprising synchronized tadpole exposure plus genetic and histological sexing of metamorphs in a flow-through-system, we tested the effects of 17β-Trenbolone (Tb), a widely used growth promoter in cattle farming, in three deeply diverged anuran families: the amphibian model species Xenopus laevis (Pipidae) and the non-models Bufo(tes) viridis (Bufonidae) and Hyla arborea (Hylidae). Trenbolone was applied in three environmentally and/or physiologically relevant concentrations (0.027 µg/L (10-10 M), 0.27 µg/L (10-9 M), 2.7 µg/L (10-8 M)). In none of the species, Tb caused sex reversals or masculinization of gonads but had negative species-specific impacts on gonad morphology and differentiation after the completion of metamorphosis, independently of genetic sex. In H. arborea and B. viridis, mounting Tb-concentration correlated positively with anatomical abnormalities at 27 µg/L (10-9 M) and 2.7 µg/L (10-8 M), occurring in X. laevis only at the highest Tb concentration. Despite anatomical aberrations, histologically all gonadal tissues differentiated seemingly normally when examined at the histological level but at various rates. Tb-concentration caused various species-specific mortalities (low in Xenopus, uncertain in Bufo). Our data suggest that deep phylogenetic divergence modifies EDC-vulnerability, as previously demonstrated for Bisphenol A (BPA) and Ethinylestradiol (EE2).
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Affiliation(s)
- Beata Rozenblut-Kościsty
- Department of Evolutionary Biology and Conservation of Vertebrates, Wroclaw University, Sienkiewicza 21, 50-335, Wroclaw, Poland
| | - Maria Ogielska
- Department of Evolutionary Biology and Conservation of Vertebrates, Wroclaw University, Sienkiewicza 21, 50-335, Wroclaw, Poland
| | - Juliane Hahn
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
| | - Denise Kleemann
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
| | - Ronja Kossakowski
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
| | - Stephanie Tamschick
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
| | - Viola Schöning
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
| | - Angela Krüger
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
| | - Ilka Lutz
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
| | - Petros Lymberakis
- Natural History Museum of Crete, University of Crete, Knossou Ave., 71409, Heraklion, Crete, Greece
| | - Werner Kloas
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany
- Department of Endocrinology, Institute of Biology, Faculty of Life Sciences, Humboldt University, Unter den Linden 6, 10099, Berlin, Germany
| | - Matthias Stöck
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301 & 310, D-12587, Berlin, Germany.
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Shi WJ, Ma DD, Jiang YX, Xie L, Zhang JN, Huang GY, Chen HX, Hou LP, Liu YS, Ying GG. Medroxyprogesterone acetate affects sex differentiation and spermatogenesis in zebrafish. Aquat Toxicol 2019; 212:70-76. [PMID: 31077968 DOI: 10.1016/j.aquatox.2019.04.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 04/15/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
Medroxyprogesterone acetate (MPA) is a widely used synthetic progestin and it has been frequently detected in aquatic environments. However, its effects on aquatic organisms remain largely unknown. Here we investigated the chronic effects of MPA on sex differentiation and gonad development in zebrafish. Zebrafish larvae at 20 days post fertilization (dpf) were exposed to 4.32, 42.0, and 424 ng L-1 of MPA until they reached 140 dpf. The results showed that chronic exposure to 42.0 ng L-1 of MPA caused 60% proportion of males as well as significant up-regulation of dmrt1 (˜1.79 fold) and hsd17b3 (˜1.92 fold). Histological analysis showed MPA significantly increased the frequency of immature spermatocytes accompanied with the increased transcription of dmrt1 (˜2.06 fold) and ar (˜1.73 fold) in the testes. Meanwhile, MPA exposure significantly increased the transcription of lhb at all exposure concentrations in the males. In contrast, it significantly suppressed the transcription of lhb (˜-8.06-fold) and fshb (˜-6.35-fold) at 42.0 ng L-1 in the females. Collectively our results demonstrated that MPA had androgenic activity, and could affect sex differentiation and spermatogenesis in zebrafish at environmentally relevant concentrations. The findings from this study suggest that MPA in the aquatic environment may pose potential androgenic risks to fish populations.
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Affiliation(s)
- Wen-Jun Shi
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Dong-Dong Ma
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Yu-Xia Jiang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Lingtian Xie
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Jin-Na Zhang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Guo-Yong Huang
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Hong-Xing Chen
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; School of Life Sciences, Guangzhou University, Guangzhou, 510655, China
| | - Li-Ping Hou
- School of Life Sciences, Guangzhou University, Guangzhou, 510655, China
| | - You-Sheng Liu
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Guang-Guo Ying
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China.
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Liang YQ, Huang GY, Zhen Z, Tian F, Hou L, Lin Z, Ying GG. The effects of binary mixtures of estradiol and progesterone on transcriptional expression profiles of genes involved in hypothalamic-pituitary-gonadal axis and circadian rhythm signaling in embryonic zebrafish (Danio rerio). Ecotoxicol Environ Saf 2019; 174:540-548. [PMID: 30865910 DOI: 10.1016/j.ecoenv.2019.03.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/27/2019] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
Natural and synthetic estrogens and progestins are present in the various aquatic environments, leading to potential exposure of aquatic organisms to their mixtures. However, very little is known about their combined effects in aquatic organisms. The aim of this study was to analyze the effects of binary mixtures of estradiol (E2) and progesterone (P4) by measuring transcriptional changes of up to 42 selected target genes related to hypothalamic-pituitary-gonadal axis and circadian rhythm signaling in zebrafish (Danio rerio) eleuthero-embryos. Zebrafish embryos were exposed to E2 and P4 alone or in combination at concentrations between 45 and 5217 ng L-1 for 96 h post fertilization (hpf). The results showed that P4 led to slight up-regulation of the cyp11a1, hsd17b3 and fshb transcripts, while a strong induction of cyp19a1b and lhb mRNA by E2 was observed. Also, cyp19a1b and lhb mRNAs expression were strongly up-regulated in the mixtures, which were the same to E2 alone. This finding suggests the mixture activity of E2 and P4 followed the independent action in zebrafish eleuthero-embryos. These transcriptional alterations may translate to adverse effects on sex differentiation and reproduction in fish.
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Affiliation(s)
- Yan-Qiu Liang
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, PR China
| | - Guo-Yong Huang
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, PR China
| | - Zhen Zhen
- Agriculture College, Guangdong Ocean University, Zhanjiang 524088, PR China
| | - Fei Tian
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, PR China
| | - Liping Hou
- School of Life Sciences, Guangzhou University, Guangzhou 510655, PR China
| | - Zhong Lin
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, PR China.
| | - Guang-Guo Ying
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, PR China.
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Hani YMI, Turies C, Palluel O, Delahaut L, Bado-Nilles A, Geffard A, Dedourge-Geffard O, Porcher JM. Effects of a chronic exposure to different water temperatures and/or to an environmental cadmium concentration on the reproduction of the threespine stickleback (Gasterosteus aculeatus). Ecotoxicol Environ Saf 2019; 174:48-57. [PMID: 30818260 DOI: 10.1016/j.ecoenv.2019.02.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/17/2019] [Accepted: 02/11/2019] [Indexed: 05/12/2023]
Abstract
Knowledge about combined effects of chemicals and temperature on reproductive capacity of fish are rare in literature, especially when it comes to the effects of chronic low-dose chemical exposure combined to the thermal stress. The aim of the study was to evaluate the single and combined effects of temperature (16, 18, 21 °C) and an environmentally relevant concentration of waterborne cadmium (1 µg L-1, nominal concentration) on the reproductive outputs of threespine stickleback (Gasterosteus aculeatus), and their consequences on offspring survival parameters. The high temperature (21 °C) was the only factor that affected parental parameters (gonadosomatic index "GSI", and vitellogenin "VTG" particularly). On females, 21 °C had a stimulating effect on gonadal development evaluated by an early increase, followed by a sharp decrease of GSI, probably indicating gonadal atresia. Promoting effect of temperature was corroborated by an early production of VTG. In vitro fertilization assays showed interesting results, particularly cadmium effects. As it was supposed, high temperature had a negative impact on offspring parameters (significant decrease in survival and an increase of unhatched embryos). Parental exposure to the very low concentration of cadmium had also negative consequences on mortality rate (significant increase) and hatching rate (significant decrease). Our results indicate that in a global warming context, high temperature and its combination with contaminant may impact reproductive capacity of G. aculeatus, by decreasing parental investment (low eggs and/or sperm quality).
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Affiliation(s)
- Younes Mohamed Ismail Hani
- Institut National de l'Environnement Industriel et des Risques (INERIS), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Verneuil-en-Halatte, France; Université de Reims Champagne-Ardenne (URCA), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Moulin de la Housse, Reims, France.
| | - Cyril Turies
- Institut National de l'Environnement Industriel et des Risques (INERIS), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Verneuil-en-Halatte, France
| | - Olivier Palluel
- Institut National de l'Environnement Industriel et des Risques (INERIS), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Verneuil-en-Halatte, France
| | - Laurence Delahaut
- Université de Reims Champagne-Ardenne (URCA), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Moulin de la Housse, Reims, France
| | - Anne Bado-Nilles
- Institut National de l'Environnement Industriel et des Risques (INERIS), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Verneuil-en-Halatte, France
| | - Alain Geffard
- Université de Reims Champagne-Ardenne (URCA), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Moulin de la Housse, Reims, France
| | - Odile Dedourge-Geffard
- Université de Reims Champagne-Ardenne (URCA), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Moulin de la Housse, Reims, France
| | - Jean-Marc Porcher
- Institut National de l'Environnement Industriel et des Risques (INERIS), UMR-I 02 SEBIO (Stress Environnementaux et Biosurveillance des milieux aquatiques), Verneuil-en-Halatte, France
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85
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Pinto J, Costa M, Leite C, Borges C, Coppola F, Henriques B, Monteiro R, Russo T, Di Cosmo A, Soares AMVM, Polese G, Pereira E, Freitas R. Ecotoxicological effects of lanthanum in Mytilus galloprovincialis: Biochemical and histopathological impacts. Aquat Toxicol 2019; 211:181-192. [PMID: 31003043 DOI: 10.1016/j.aquatox.2019.03.017] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 03/18/2019] [Accepted: 03/24/2019] [Indexed: 06/09/2023]
Abstract
Inappropriate processing and disposal of electronic waste contributes to the contamination of aquatic systems by various types of pollutants such as the rare-earth elements (REE) in which lanthanum (La) is included. Knowledge on the toxicity of these elements in marine organisms is still scarce when compared to other metals such as mercury (Hg) and arsenic (As). Therefore, this study aims to assess the toxicity of La on the mussel Mytilus galloprovincialis, considered a good bioindicator of aquatic pollution, through the analysis of metabolic, oxidative stress, neurotoxicity and histopathological markers. Organisms were exposed to different concentrations of La for a period of 28 days (0, 0.1, 1, 10 mg/L) under controlled temperature (18 °C ± 1.0) and salinity (30 ± 1) conditions. La concentrations in mussels increased in higher exposure concentrations. La exposure demonstrated a biochemical response in mussels, evidenced by lowered metabolism and accumulation of energy reserves, activation of the antioxidant defences SOD and GPx as well as the biotransformation enzymes GSTs, especially at intermediate concentrations. Despite oxidative stress being shown by a decrease in GSH/GSSG, oxidative damage was avoided as evidenced by lower LPO and PC levels. Inhibition of the enzyme AChE demonstrated the neurotoxicity of La in this species. Histopathological indices were significantly different from the control group, indicating impacts in gonads, gills and digestive glands of mussels due to La. These results show that La can be considered a risk for marine organisms and thus its discharge into the environment should be monitored.
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Affiliation(s)
- João Pinto
- Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Marcelo Costa
- Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Carla Leite
- Departamento de Biologia, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Cláudia Borges
- Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Francesca Coppola
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Bruno Henriques
- Departamento de Química & CESAM & LAQV-REQUIMTE, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Rui Monteiro
- Departamento de Química & CESAM & LAQV-REQUIMTE, Universidade de Aveiro, 3810-193 Aveiro, Portugal; CIIMAR, Universidade do Porto, 4050-123 Porto, Portugal
| | - Tania Russo
- Dipartimento di Biologia, Universitá degli studi di Napoli Federico II, 80126 Napoli, Italy
| | - Anna Di Cosmo
- Dipartimento di Biologia, Universitá degli studi di Napoli Federico II, 80126 Napoli, Italy
| | - Amadeu M V M Soares
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Gianluca Polese
- Dipartimento di Biologia, Universitá degli studi di Napoli Federico II, 80126 Napoli, Italy
| | - Eduarda Pereira
- Departamento de Química & CESAM & LAQV-REQUIMTE, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Rosa Freitas
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
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86
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Wu GC, Jeng SR, Pan YT, Li HW, Ku WL, Lin CJ, Chang CF. The germline-specific expression of Foxl3a and its paralogous Foxl3b are associated with male gonadal differentiation in the Japanese eel, Anguilla japonica. Gen Comp Endocrinol 2019; 277:56-65. [PMID: 30878349 DOI: 10.1016/j.ygcen.2019.03.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 10/27/2022]
Abstract
Unlike its paralog Foxl2, which is well known for its role in ovarian development in vertebrates, the function of Foxl3 is still unclear. Foxl3 is an ancient duplicated copy of Foxl2. It is present as a single copy in ray-finned fish. But, due to repeated losses, it is absent in most tetrapods. Our transcriptomic data, however, show that two Foxl3s (Foxl3a and its paralog Foxl3b) are present in Japanese eel. Foxl3a is predominantly expressed in the pituitary, and Foxl3b is predominantly expressed in the gills. Both Foxl3s show a sex-dimorphic expression, being higher expression in testes than in ovaries. Moreover, Foxl3a and Foxl3b were exclusively expressed during gonadal differentiation in control eels (100% male). Conversely, Foxl3a and Foxl3b significantly decreased after gonadal differentiation in E2-treated eels (100% female). Furthermore, in accordance the difference in adhesive ability between somatic cells and germline cells in testes, Foxl3s showed a high expression in suspension cells (putative germline cells) and low expression in adhesive cells (putative somatic cells). In situ hybridization further showed that Foxl3a and Foxl3b were expressed in the testicular germline cells. In addition, Foxl3s expression was not changed by sex steroids in in vitro testes culture. Taken together, our results suggest that the teleost-specific Foxl3 paralog was repeatedly lost in most fish after the third round of whole genome duplication. The two germline-expressed Foxl3s had higher expression levels in males than in females during gonadal differentiation in Japanese eel. These results demonstrated that Foxl3s might play an important role in germline sexual fate determination from ancient fish to modern fish.
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Affiliation(s)
- Guan-Chung Wu
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202, Taiwan.
| | - Shan-Ru Jeng
- Department of Aquaculture, National Kaohsiung University of Science and Technology, Kaohsiung 811, Taiwan
| | - Yi-Tin Pan
- Department of Aquaculture, National Kaohsiung University of Science and Technology, Kaohsiung 811, Taiwan
| | - Hau-Wen Li
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Wei-Lun Ku
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Chien-Ju Lin
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Ching-Fong Chang
- Department of Aquaculture, National Taiwan Ocean University, Keelung 202, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 202, Taiwan.
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87
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Wu L, Li Y, Xu Y, Li Y, Wang L, Ma X, Liu H, Li X, Zhou L. Cloning and characterization of wnt4a gene in a natural triploid teleost, Qi river crucian carp (Carassius auratus). Gen Comp Endocrinol 2019; 277:104-111. [PMID: 30923007 DOI: 10.1016/j.ygcen.2019.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/09/2019] [Accepted: 03/24/2019] [Indexed: 10/27/2022]
Abstract
WNT4 (wingless-type MMTV integration site family, member 4) plays a key role in the ovarian differentiation and development in mammals. However, the possible roles of Wnt4 during gonadal differentiation and development need further clarification in teleosts. In this study, we cloned and characterized the full-length cDNA of Qi river crucian carp (Carassius auratus) wnt4a gene (CA-wnt4a). The cDNA of CA-wnt4a is 2337 bp, including the ORF of 1059 bp, encoding a putative protein with a transmembrane domain and a WNT family domain. Sequence and phylogenetic analyses revealed that the CA-Wnt4a identified is a genuine Wnt4a. Tissue distribution analysis showed that CA-wnt4a is expressed in all the tissues examined, including ovary. CA-wnt4a undergoes a stepwise increase in the embryonic stages, suggesting that CA-wnt4a might be involved in the early developmental stage. Ontogenic analysis demonstrated that CA-wnt4a expression is upregulated in the ovaries at 30-50 days after hatching (dah), the critical period of sex determination/differentiation in Qi river crucian carp. From 90 dah, the expression of CA-wnt4a was gradually downregulated in the developing ovaries. Immunohistochemistry demonstrated that CA-Wnt4a was expressed in the somatic and germ cells of the ovary by 30 dah, thereafter, positive signals of Wnt4a were detected in the somatic cells, oogonia and primary growth oocytes from 60 dah. In the sex-reversed testis induced by letrozole treatment, the expression level of CA-wnt4a was significantly downregulated. When CA-wnt4a expression was inhibited by injection of FH535 (an inhibitor of canonical Wnt/β-catenin signal pathway) in the ovaries, levels of cyp19a1a, foxl2 mRNA were significantly downregulated, while sox9b and cyp11c1 were upregulated, which suggested that together with Foxl2-leading estrogen pathway, CA-wnt4a signaling pathway might be involved in ovarian differentiation and repression of the male pathway gene expression in Qi river crucian carp.
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Affiliation(s)
- Limin Wu
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Yongjing Li
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Yufeng Xu
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Yanfeng Li
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Lei Wang
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Xiao Ma
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Huifen Liu
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Xuejun Li
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Linyan Zhou
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, School of Life Science, Southwest University, Chongqing 400715, PR China.
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88
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Li S, Sun Q, Wu Q, Gui W, Zhu G, Schlenk D. Endocrine disrupting effects of tebuconazole on different life stages of zebrafish (Danio rerio). Environ Pollut 2019; 249:1049-1059. [PMID: 31146311 DOI: 10.1016/j.envpol.2019.03.067] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 02/23/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
Tebuconazole is a widely used fungicide that has been detected in water ecosystems, of which the concentrations may affect the endocrine function of aquatic organisms. At present study, tissue-specific bioaccumulation of tebuconazole was found in ovary of adult zebrafish, indicating a potential risk of endocrine disruption. In order to evaluate the potential endocrine disrupting effects, three life stages (2 hpf (hours post-fertilization) -60 dpf (days post-fertilization), Stage I; 60-120 dpf, Stage II; 180-208 dpf, Stage III) of zebrafish (Danio rerio) were chronically exposed to tebuconazole at the concentrations ranging from 0.05 mg/L to 1.84 mg/L. Result showed that exposed to tebuconazole could lead to a male-biased sex differentiation in juvenile zebrafish and significant decrease of the percentage of germ cells in sexually-mature zebrafish. Egg production was significantly inhibited by 57.8% and 19.2% after Stage II- and Stage III-exposures, respectively. The contents of 17β-estradiol in gonad decreased by 63.5% when exposed to 0.20 mg/L tebuconazole at Stage II and by 49.5% after exposed to 0.18 mg/L tebuconazole at Stage III, respectively. For all stages exposure, reductions in 17β-estradiol/testosterone ratio were observed, indicating an imbalance in steroids synthesis. Additionally, tebuconazole reduced the expression of cyp19a, which was consistent with the decrease of E2 level. In overall, the present findings indicated that, playing as an anti-estrogen-like chemical, tebuconazole inhibited the expression of Cyp19, thereby impairing steroid hormones biosynthesis, leading to a diminished fecundity of zebrafish.
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Affiliation(s)
- Shuying Li
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR, China; Department of Environmental Sciences, University of California, Riverside, CA, 92521, United States
| | - Qianqian Sun
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR, China
| | - Qiong Wu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR, China
| | - Wenjun Gui
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR, China.
| | - Guonian Zhu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310058, PR, China
| | - Daniel Schlenk
- Department of Environmental Sciences, University of California, Riverside, CA, 92521, United States
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89
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Wang Y, Zhang Y, Zeng T, Li W, Yang L, Guo B. Accumulation and toxicity of thiamethoxam and its metabolite clothianidin to the gonads of Eremias argus. Sci Total Environ 2019; 667:586-593. [PMID: 30833257 DOI: 10.1016/j.scitotenv.2019.02.419] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/25/2019] [Accepted: 02/26/2019] [Indexed: 06/09/2023]
Abstract
The endocrine disrupting effect of pesticides is considered to be an important factor in the decline of reptile populations. The large-scale application of neonicotinoids in the environment poses a potential threat to small farmland lizards Eremias argus. In this study, we evaluated the disruption effects of thiamethoxam and its metabolite clothianidin on the endocrine disruption of Eremias argus during 28 d exposure. Thiamethoxam and clothianidin could accumulate in the testis and ovary. Adequate blood exchange was the main cause of thiamethoxam and clothianidin accumulation in the gonads. The production of clothianidin aggravated the effect of endocrine disruption to lizards. Thiamethoxam/clothianidin exhibited two distinct ways of interfering with the endocrine disruption of the male and female lizards. Thiamethoxam/clothianidin significantly up-regulated the expression of cyp17 and cyp19 genes in the testis, which ultimately led to a significant decrease in testosterone levels and a significant increase in the 17-estradiol concentrations in plasma. The expression of the estrogen receptor gene in the liver was also significantly increased in male lizards. The significant declines in testosterone and prostaglandin D2 levels in the plasma indicated that thiamethoxam and clothianidin could cause androgen deficiency in male lizards. Meanwhile, in female lizards, thiamethoxam/clothianidin increased the expression of hsd17β gene in the ovary, causing an increase in testosterone levels in the plasma and an up-regulation of androgen receptor expression in the liver. The effects of thiamethoxam and clothianidin on male lizards were more pronounced. This study verified the possible endocrine disrupting effects of neonicotinoids and provided a new perspective for the study of global recession of reptiles.
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Affiliation(s)
- Yinghuan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, PR China.
| | - Yang Zhang
- Benxi Institute for Drug Control, No.31 Shengli Road, Mingshan District, Benxi 117000, PR China
| | - Tao Zeng
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Wei Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, PR China
| | - Lu Yang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, PR China
| | - Baoyuan Guo
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, PR China
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90
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Cao J, Wang G, Wang T, Chen J, Wenjing G, Wu P, He X, Xie L. Copper caused reproductive endocrine disruption in zebrafish (Danio rerio). Aquat Toxicol 2019; 211:124-136. [PMID: 30965180 DOI: 10.1016/j.aquatox.2019.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/27/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
Cu in surface waters has been demonstrated to affect aquatic animals at ecologically relevant concentrations. However, its effects on reproductive endocrine system and the underlying toxicological mechanisms are largely unknown. In this study, zebrafish (Danio rerio) were exposed to 0, 10, 20, 40 μg/L of Cu for 30 days. Growth, gonad histopathology, the hormone levels and the transcriptional profiles of genes in the hypothalamic-pituitary-gonadal (HPG) axis in both sexes were examined. The results indicated that body weight was significantly reduced, the gonadal development was affected, and the levels of E2, T and 11-KT were remarkably disturbed in Cu-exposed fish. Moreover, the expression profiles of steroidogenesis-related genes in gonad (3βhsd, 17βhsd, cyp11a1, cyp17, cyp19a, lhr, fshr, hmgra and star) and in brains (ar, cyp19b, erα, er2β, lhβ, fshβ, gnrh2, gnrh3, gnrhr1, gnrh2 and gnrh4) displayed alterations after exposure to Cu. These results demonstrated that Cu could suppress the growth of zebrafish and significantly affect the reproductive biology in both sexes by damaging the structure of the gonads, altering the steroid hormone levels and the expressions of endocrine-related genes in HPG of zebrafish. This study suggests that Cu adversely affects the reproductive endocrine system in zebrafish and could pose a potential threat to fish populations inhabiting Cu-contaminated waters.
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Affiliation(s)
- Jinling Cao
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China.
| | - Guodong Wang
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China; School of Biotechnology and Food Engineering, Anyang Institute of Technology, Anyang, Henan, 455000, China.
| | - Tianyu Wang
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China.
| | - Jianjie Chen
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China.
| | - Guo Wenjing
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China.
| | - Panhong Wu
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China.
| | - Xinjin He
- State Key Laboratory of Ecological Animal Husbandry and Environmental Veterinary Medicine, College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China.
| | - Lingtian Xie
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China.
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91
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Lee G, Lee S, Ha N, Kho Y, Park K, Kim P, Ahn B, Kim S, Choi K. Effects of gemfibrozil on sex hormones and reproduction related performances of Oryzias latipes following long-term (155 d) and short-term (21 d) exposure. Ecotoxicol Environ Saf 2019; 173:174-181. [PMID: 30772707 DOI: 10.1016/j.ecoenv.2019.02.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 01/31/2019] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
Gemfibrozil, a lipid-regulating pharmaceutical, has been widely used for treating dyslipidemia in humans and detected frequently in freshwater environments. Since plasma cholesterol is a precursor of steroid hormones, the use of gemfibrozil may influence the sex hormone balances. However, its endocrine toxicity following long-term exposure is not well understood. The purpose of the present study is to investigate the effects of gemfibrozil on sex hormones and reproductive outcomes in a freshwater fish, following a long-term (155 d) exposure. For this purpose, Japanese medaka embryos (F0) were exposed to a series of gemfibrozil concentrations, i.e., 0, 0.04, 0.4, 3.7, and 40 mg/L for 155 d, and reproductive parameters, sex hormones, and associated gene expressions were assessed. For comparison, a short-term exposure (21 d) was performed separately with adult medaka and measured for sex hormones and related gene expressions. Following the 155 d long-term exposure, the fecundity showed a decreasing pattern. In addition, at 3.7 mg/L gemfibrozil, testosterone (T) level in the female fish was significantly decreased, and the hatchability of F1 fish was significantly decreased. The estrogen receptor (er) or vitellogenin (vtg) genes in gonads and liver were up-regulated. However, plasma cholesterol levels did not show significant changes in both sexes. The observations from the short-term (21 d) exposure were different from those of the long-term exposure. Following the short-term exposure, decreased 17β-estradiol (E2), and 11-ketotestosterone (11-KT) levels along with decrease plasma cholesterol were observed in the male fish. The hormone disruption following the short-term exposure appears to be associated with the hypocholesterolemic activity of gemfibrozil. Our results show that the mechanisms of gemfibrozil toxicity may depend on the exposure duration. Consequences of long-term exposure to other fibrates in the water environment warrant further investigations.
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Affiliation(s)
- Gowoon Lee
- School of Public Health, Seoul National University, Seoul 08826, Republic of Korea
| | - Sangwoo Lee
- School of Public Health, Seoul National University, Seoul 08826, Republic of Korea; Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon 34114, Republic of Korea
| | - Nayoung Ha
- School of Public Health, Seoul National University, Seoul 08826, Republic of Korea
| | - Younglim Kho
- School of Human and Environmental Sciences, Eulji University, Seongnam, Gyeonggi 13135, Republic of Korea
| | - Kyunghwa Park
- National Institute of Environmental Research, Incheon 22689, Republic of Korea
| | - Pilje Kim
- National Institute of Environmental Research, Incheon 22689, Republic of Korea
| | - Byeongwoo Ahn
- College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Sunmi Kim
- School of Public Health, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungho Choi
- School of Public Health, Seoul National University, Seoul 08826, Republic of Korea.
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92
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Steinbach C, Císař P, Šauer P, Klicnarová J, Schmidt-Posthaus H, Golovko O, Kocour Kroupová H. Synthetic progestin etonogestrel negatively affects mating behavior and reproduction in Endler's guppies (Poecilia wingei). Sci Total Environ 2019; 663:206-215. [PMID: 30711587 DOI: 10.1016/j.scitotenv.2019.01.276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/14/2019] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
High rates of progestins consumption in the form of active ingredients in women's oral contraceptives and other hormonal preparations may lead to their increased concentrations in aquatic environments and subsequent harmful effect on fish reproduction. The objective of the present study was to assess the effect of etonogestrel, a third-generation synthetic progestin, on the reproductive behavior, fertility, gonads histology, and secondary sexual characteristics of male and female Endler's guppies (Poecilia wingei). Fish were subjected for 34 days to two concentrations of etonogestrel, including one possibly environmentally relevant (3.2 ng L-1) and one sublethal (320 ng L-1) concentration. A mating behavior study was subsequently conducted and revealed that the treatment with etonogestrel significantly reduced mating frequency in the exposed fish compared to controls. All the exposed females were unable to reproduce. In addition, female fish exposed to the highest level of etonogestrel were masculinized, as their anal fins and body coloration showed patterns similar to those of male fish. Etonogestrel-exposed females also had fewer developed oocytes. In conclusion, the low etonogestrel concentration (3.2 ng L-1) led to a reduction of mating activity in males without effect on their reproductive success, but it completely inhibited reproduction in females. Exposure to etonogestrel clearly has more severe consequences for females than males.
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Affiliation(s)
- Christoph Steinbach
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, 389 25, Vodňany, Czech Republic.
| | - Petr Císař
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, 389 25, Vodňany, Czech Republic
| | - Pavel Šauer
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, 389 25, Vodňany, Czech Republic
| | - Jana Klicnarová
- Faculty of Economics, University of South Bohemia in České Budějovice, Studentská 13, 370 05 České Budějovice, Czech Republic
| | - Heike Schmidt-Posthaus
- Centre for Fish and Wildlife Health, Department of Infectious Diseases and Pathobiology, University of Bern, Länggass-Strasse 122, 3001 Bern, Switzerland
| | - Oksana Golovko
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, 389 25, Vodňany, Czech Republic
| | - Hana Kocour Kroupová
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, 389 25, Vodňany, Czech Republic
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93
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Sumi N, Chitra KC. Fullerene C 60 nanomaterial induced oxidative imbalance in gonads of the freshwater fish, Anabas testudineus (Bloch, 1792). Aquat Toxicol 2019; 210:196-206. [PMID: 30870666 DOI: 10.1016/j.aquatox.2019.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/01/2019] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
The engineered carbon nanomaterial, fullerene C60, with unique physicochemical properties, released into the aquatic environment is known to formulate high risk factor for the aquatic life. The present study was aimed to investigate fullerene C60 induced oxidative imbalance in ovary and testis of the freshwater fish, Anabas testudineus. The median lethal concentration (96 h-LC50) of fullerene C60 in Anabas testudineus was 50 mg/ L, and fish exposed to two sublethal concentrations i.e., 5 mg/ L and 10 mg/ L (one-tenth and one-fifth of LC50) for short-term (24, 48, 72 and 96 h) and long-term (7, 15, 30 and 60 d) durations. The antioxidant parameters such as the activities of superoxide dismutase (SOD), catalase, glutathione reductase, glutathione peroxidase, the levels of hydrogen peroxide generation and lipid peroxidation were analyzed along with histopathological alterations in gonadal tissues. Both sublethal concentrations of fullerene C60 caused significant (P < 0.05) decrease in the activities of antioxidant enzymes, whereas the levels of hydrogen peroxide generation and lipid peroxidation increased significantly (P < 0.05) in gonads. Fullerene exposure significantly (P < 0.05) increased the mucous deposition with significant (P < 0.05) reduction in the weights of gonads and gonado-somatic index. The histopathological analysis showed prominent alterations in testis and ovary of treated fishes when compared to the control groups. After 60 d of sublethal exposure of fullerene C60, fish were left in the toxicant-free water for another 60 d, in which the changes in the activities of the gonadal antioxidant enzymes and histological alterations were not completely recovered. Hence, from the present study, it was illustrated that fullerene C60 caused oxidative imbalance in the gonads, which may possibly affect the reproductive potential of the fish, Anabas testudineus.
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Affiliation(s)
- N Sumi
- Endocrinology and Toxicology Laboratory, Department of Zoology, University of Calicut, Malappuram District, Kerala, 673 635, India
| | - K C Chitra
- Endocrinology and Toxicology Laboratory, Department of Zoology, University of Calicut, Malappuram District, Kerala, 673 635, India.
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94
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Dell'Acqua O, Ferrando S, Chiantore M, Asnaghi V. The impact of ocean acidification on the gonads of three key Antarctic benthic macroinvertebrates. Aquat Toxicol 2019; 210:19-29. [PMID: 30818112 DOI: 10.1016/j.aquatox.2019.02.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 02/14/2019] [Accepted: 02/17/2019] [Indexed: 05/26/2023]
Abstract
CO2 atmospheric pressure is increasing since industrial revolution, leading to a lowering of the ocean surface water pH, a phenomenon known as ocean acidification, with several reported effects on individual species and cascading effects on marine ecosystems. Despite the great amount of literature on ocean acidification effects on calcifying organisms, the response of their reproductive system still remains poorly known. In the present study, we investigated the histopathological effects of low pH on the gonads of three key macroinvertebrates of the Terra Nova Bay (Ross Sea) littoral area: the sea urchin Sterechinus neumayeri, the sea star Odontaster validus and the scallop Adamussium colbecki. After 1 month of exposure at control (8.12) and reduced (7.8 and 7.6) pH levels, we dissected the gonads and performed histological analyses to detect potential differences among treatments. Results showed significant effects on reproductive conditions of A. colbecki and S. neumayeri, while O. validus did not show any kind of alteration. Present results reinforce the need to focus on ocean acidification effects on soft tissues, particularly the gonads, whose damage may exert large effects on the individual fitness, with cascading effects on the population dynamic of the species.
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Affiliation(s)
- Ombretta Dell'Acqua
- Department of Earth, Environment and Life Sciences (DiSTAV), University of Genoa, Corso Europa 26, 16132, Genova, Italy.
| | - Sara Ferrando
- Department of Earth, Environment and Life Sciences (DiSTAV), University of Genoa, Corso Europa 26, 16132, Genova, Italy.
| | - Mariachiara Chiantore
- Department of Earth, Environment and Life Sciences (DiSTAV), University of Genoa, Corso Europa 26, 16132, Genova, Italy.
| | - Valentina Asnaghi
- Department of Earth, Environment and Life Sciences (DiSTAV), University of Genoa, Corso Europa 26, 16132, Genova, Italy.
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95
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Tao S, Wang L, Zhu Z, Liu Y, Wu L, Yuan C, Zhang G, Wang Z. Adverse effects of bisphenol A on Sertoli cell blood-testis barrier in rare minnow Gobiocypris rarus. Ecotoxicol Environ Saf 2019; 171:475-483. [PMID: 30639874 DOI: 10.1016/j.ecoenv.2019.01.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 12/28/2018] [Accepted: 01/03/2019] [Indexed: 06/09/2023]
Abstract
Bisphenol A (BPA), an environmental contaminant, has been shown to disturb the dynamics of Sertoli cell blood-testis barrier (BTB) in mammal testis. However, the effects of BPA on Sertoli cell barrier (SC barrier) were little known in fish to date. To evaluate the potential mechanism of reproductive toxicity of BPA, we studied the damage of SC barrier using in vivo models. In this study, male adult rare minnow Gobiocypris rarus were exposed to 15 μg/L BPA for 7-35 days. Gonadal histology and the integrity of SC barrier were analyzed. Meanwhile, the expressions of SC barrier -associated proteins, tumor necrosis factor (TNFα) content, and the mRNA expressions of genes in the mitogen activated protein kinase (MAPK) pathway were detected. Histological analysis demonstrated 15 μg/L BPA promoted the infiltration of inflammatory cells in fish testes after 7-days exposure. The biotin tracer assay showed that 7-days BPA exposure increased permeability for spermatid cysts. In addition, the BPA treatment caused increased TNFα in testis, which was reportedly related to SC barrier impairment. The expressions of Occludin and β-Catenin protein were significantly decreased in the testes after 7- and 21-days exposure. BPA also altered the mRNA expressions of occludin, β-catenin, p38 MAPK and JNK. Therefore, the detrimental effects of BPA on reproduction of male fish may attribute to the disturbed expressions of SC junction proteins.
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Affiliation(s)
- Shiyu Tao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lihong Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zeliang Zhu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yan Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lang Wu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cong Yuan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Guo Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zaizhao Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China.
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96
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Jackson LM, Felgenhauer BE, Klerks PL. Feminization, altered gonadal development, and liver damage in least killifish (Heterandria formosa) exposed to sublethal concentrations of 17α-ethinylestradiol. Ecotoxicol Environ Saf 2019; 170:331-337. [PMID: 30544093 DOI: 10.1016/j.ecoenv.2018.11.094] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 11/19/2018] [Accepted: 11/20/2018] [Indexed: 06/09/2023]
Abstract
The widespread use of the synthetic estrogen 17 α-ethinylestradiol (EE2) has resulted in elevated levels in aquatic environments, where it is known to act as an endocrine disrupting chemical affecting fish and other aquatic organisms. Examining changes in the structure of the fish' gonads and liver has proven to be an effective approach for assessing these impacts. While changes have been reported for various fish species, it is not clear whether impacts are equally severe in live-bearing fishes. The present study looked at gonadal and liver development in EE2-exposed least killifish (Heterandria formosa), a live-bearing Poeciliid. Exposures to 0, 5, or 25 ng/L EE2 began within six days of birth and continued until fish became sexually mature 12-23 weeks later. Exposure to 5 ng/L EE2 resulted in severe intersex in fish with external male characteristics, a slowdown of spermatogenesis in these intersex fish and a slowdown of oogenesis in the female fish. Moreover, these fish had a variety of liver injuries. Fish exposed to 25 ng/L EE2 exhibited intersex but at a lower frequency than occurred at 5 ng/L. In contrast, liver damage and slowdown of both oogenesis and spermatogenesis exhibited the typical dose-dependence. These findings illustrate the importance of including histological analyses when assessing endocrine disruption in fish, demonstrate that the live-bearing mode of reproduction appears to provide limited protection from the effects of waterborne EE2, and provide further evidence that EE2 has multiple impacts on fish health and reproduction that are severe enough to potentially affect fish populations.
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Affiliation(s)
- Latonya M Jackson
- Department of Biology, University of Louisiana at Lafayette, Box 43602, Lafayette, LA 70504, USA.
| | - Bruce E Felgenhauer
- Department of Biology, University of Louisiana at Lafayette, Box 43602, Lafayette, LA 70504, USA
| | - Paul L Klerks
- Department of Biology, University of Louisiana at Lafayette, Box 43602, Lafayette, LA 70504, USA
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97
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Wang Q, Yang H, Yang M, Yu Y, Yan M, Zhou L, Liu X, Xiao S, Yang Y, Wang Y, Zheng L, Zhao H, Li Y. Toxic effects of bisphenol A on goldfish gonad development and the possible pathway of BPA disturbance in female and male fish reproduction. Chemosphere 2019; 221:235-245. [PMID: 30640006 DOI: 10.1016/j.chemosphere.2019.01.033] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/27/2018] [Accepted: 01/05/2019] [Indexed: 06/09/2023]
Abstract
Bisphenol A (BPA) is an abundant endocrine-disrupting compound that is found in the aquatic environment and has adverse effects on fish reproduction; however, the exact pathway of these impacts is unclear. In this study, the different effects of BPA on ovarian and testis development in goldfish (Carassius auratus) and the different mechanisms underlying these effects were investigated. The gonadosomatic index (GSI) and gonadal histology demonstrated that BPA diminished ovarian maturation in goldfish, which recovered after BPA treatment withdrawal. In males, BPA disrupted testis maturation, but this disruption could not be recovered after BPA treatment withdrawal. The hypothalamic-pituitary-gonad (HPG) axis-related genes sgnrh, fshβ and lhβ were significantly decreased in BPA-treated female fish, while no changes in sex steroid hormone levels and no TUNEL and PCNA staining were found in the ovary, suggesting that BPA may reduce ovarian maturation through the HPG axis. In male fish, TUNEL staining was found in 1 μg L-1 BPA-exposed germ cells and 50 and 500 μg L-1 BPA-exposed Leydig cells. Decreases in 11-KT levels were also found in 50 and 500 μg L-1 BPA-exposed fish, but BPA did not affect genes associated with the HPG axes. This result shows that BPA disrupts testis maturation through apoptosis of germ cells and Leydig cells, thus inducing decreases in 11-KT levels that disrupt spermatogenesis. Collectively, our findings provide insights into the molecular and cellular mechanisms underlying BPA disturbance of goldfish reproduction.
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Affiliation(s)
- Qing Wang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Huirong Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Min Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Yepin Yu
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Muting Yan
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Lei Zhou
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Xiaochun Liu
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Shiqiang Xiao
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Yan Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Yuxin Wang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Leyun Zheng
- Research Institute of Fujian, Xiamen 361000, People's Republic of China
| | - HuiHong Zhao
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China.
| | - Yuanyou Li
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China.
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98
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Sun W, Jia Y, Ding X, Dai L, Liu C, Wang J, Zhao G, Zhou H, Yu L. Combined effects of pentachlorophenol and its byproduct hexachlorobenzene on endocrine and reproduction in zebrafish. Chemosphere 2019; 220:216-226. [PMID: 30583213 DOI: 10.1016/j.chemosphere.2018.12.100] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 12/11/2018] [Accepted: 12/12/2018] [Indexed: 06/09/2023]
Abstract
Pentachlorophenol (PCP) and its byproduct hexachlorobenze (HCB) are two co-existing persistent environmental chemicals, but their combined toxicity remains unclear. In this study, adult zebrafish were exposed to 5 (low dose) and 25 μg·L-1 (high dose) of PCP, HCB or their combination for 21 days, and the impact on endocrine and reproduction was investigated. Results showed that combined exposure to 25 μg·L-1 PCP and 25 μg· L-1 HCB significantly increased the plasma estradiol (E2) and testosterone (T) levels, altered the expressions of genes along the hypothalamic-pituitary-gonadal-liver (HPGL) axis, inhibited gonadal development, and eventually lead to decreased egg production of F0 zebrafish as well as inhibited development of F1 eggs/larvae. Compared to the combined exposure of high doses, significantly lower levels of plasma E2 and T were observed for either the high PCP or high HCB alone exposure, indicating a synergistic effect of the two chemicals on endocrine disruption after combination. Furthermore, the high PCP alone exposure inhibited the gonadal development in both the males and females, while the HCB alone exposure did not. Comparison of exposure effects indicated a greater decrease of mature gametes levels and egg production in the high combined group when compared to the high HCB alone group, but no significant difference was observed between the high combined group and the high PCP alone group. Taken together, the results suggested that combined exposure to PCP and HCB may synergistically affect endocrine of zebrafish, and result in reproduction impairments, with PCP being the primary contributor.
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Affiliation(s)
- Wen Sun
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yali Jia
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xisheng Ding
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Lili Dai
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, China
| | - Chunsheng Liu
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan Changde, 415000, China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, China
| | - Jianghua Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, China
| | - Gaofeng Zhao
- China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Huaidong Zhou
- China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Liqin Yu
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, China.
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99
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Lyu Q, Hu J, Yang X, Liu X, Chen Y, Xiao L, Liu Y, Wang Q, Chen J, Huang M, Yu Z, Yang H, Shi H, Zhang Y, Zhao H. Expression profiles of dmrts and foxls during gonadal development and sex reversal induced by 17α-methyltestosterone in the orange-spotted grouper. Gen Comp Endocrinol 2019; 274:26-36. [PMID: 30594589 DOI: 10.1016/j.ygcen.2018.12.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 12/24/2018] [Accepted: 12/26/2018] [Indexed: 12/19/2022]
Abstract
The orange-spotted grouper, Epinephelus coioides, is a marine protogynous hermaphrodite fish of commercial importance. There are many examples of sex change species among marine fish, but the molecular basis for the sex change is still unknown. Gonadal expression patterns of the dmrts and foxls genes in E. coioides have pointed to sexual dimorphism in this species and it has been shown that mRNA levels of dmrts and foxls to vary significantly during reproduction cycles. The steroid 17α-methyltestosterone was used to induce sex reversal in these fish, during which dmrts and foxls levels changed significantly and subsequently reverted to normal when 17α-methyltestosterone was withdrawn. Interestingly, the expression of dmrt2b and dmrt3 was not affected by this steroid. We speculate that the role of foxl2 in reproduction may be conserved via regulation of early differentiation of the ovary by the hypothalamus-pituitary-gonad axis, and dmrt2 may have a significant role in premature ovarian differentiation and maintenance in E. coioides. dmrt1 and foxl3 played a role in the development of the testes and are believed to be potential male regulatory genes.
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Affiliation(s)
- Qingji Lyu
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China
| | - Juan Hu
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China
| | - XianKuan Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China
| | - XiaoChun Liu
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China
| | - YiBin Chen
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China
| | - Ling Xiao
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, People's Republic of China
| | - YaLi Liu
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, People's Republic of China
| | - Qing Wang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China; State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, People's Republic of China
| | - JiaXing Chen
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, People's Republic of China
| | - MinWei Huang
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, People's Republic of China
| | - ZeShu Yu
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, People's Republic of China
| | - HuiRong Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China
| | - HeRong Shi
- Guangdong Marine Fishery Experiment Center, Huizhou 516081, Guangdong, People's Republic of China
| | - Yong Zhang
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory for Aquatic Economic Animals and Guangdong Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, People's Republic of China.
| | - HuiHong Zhao
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, Guangdong, People's Republic of China.
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100
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Huang Y, Liu J, Yu L, Liu C, Wang J. Gonadal impairment and parental transfer of tris (2-butoxyethyl) phosphate in zebrafish after long-term exposure to environmentally relevant concentrations. Chemosphere 2019; 218:449-457. [PMID: 30497028 DOI: 10.1016/j.chemosphere.2018.11.139] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 11/19/2018] [Accepted: 11/21/2018] [Indexed: 06/09/2023]
Abstract
Tris (2-butoxyethyl) phosphate (TBOEP) is a ubiquitous environmental contaminant due to its overuse. TBOEP has been found to cause reproductive toxicity and endocrine disruption during acute toxic experiment. In this study, we examined the effects of TBOEP on growth in initial generation (F0) zebrafish and transgenerational effects on growth of first generation (F1) larvae after parental long-term exposure (120 d) to environmentally relevant concentrations (0, 0.1, 1, 10 and 100 μg/L). Exposure to TBOEP resulted in significantly less growth as measured by body length, body weight and gonadosomatic index (GSI) in F0 females but not F0 males. Furthermore, the bioaccumulation of TBOEP in gonad, the alteration of the gene transcriptions in the hypothalamic-pituitary-gonadal (HPG) axis, and the delay in gonadal development in both female and male zebrafish were demonstrated. In addition, the residues of TBOEP were detected in F1 larvae after parental exposure, resulting in lower survival and shorter body length, as well as faster heart rate. And no significant changes in gene expressions along the growth hormone/insulin-like growth factor (GH/IGF) axis and the hypothalamic-pituitary-thyroid (HPT) axis were found in F1 larvae. In conclusion, these results indicated that long-term parental exposure to environmentally relevant concentrations of TBOEP could inhibit the development of progeny by parental gonadal impairment and by TBOEP transfer to offspring, instead of gene transcription in GH/IGF and HPT axes.
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Affiliation(s)
- Yangyang Huang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Jue Liu
- Department of Pharmacy, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430014, China
| | - Liqin Yu
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Chunsheng Liu
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde 415000, China
| | - Jianghua Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.
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