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Chen Z, Li X, Gao J, Liu Y, Zhang N, Guo Y, Wang Z, Dong Z. Effects of salinity on behavior and reproductive toxicity of BPA in adult marine medaka. CHEMOSPHERE 2024; 357:142103. [PMID: 38653400 DOI: 10.1016/j.chemosphere.2024.142103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/18/2024] [Accepted: 04/20/2024] [Indexed: 04/25/2024]
Abstract
Salinity is an important environmental factor influencing the toxicity of chemicals. Bisphenol A (BPA) is an environmental endocrine disruptor with adverse effects on aquatic organisms, such as fish. However, the influence of salinity on the biotoxicity of BPA and the underlying mechanism are unclear. In this study, we exposed marine medaka (Oryzias melastigma) to BPA at different salinities (0 psμ, 15 psμ, and 30 psμ) for 70days to investigate the toxic effects. At 0 psμ salinity, BPA had an inhibitory effect on the swimming behavior of female medaka. At 15 psμ salinity, exposure to BPA resulted in necrotic cells in the ovaries but not on the spermatozoa. In addition, BPA exposure changed the transcript levels of genes related to the nervous system (gap43, elavl3, gfap, mbpa, and α-tubulin) and the hypothalamic-pituitary-gonadal (HPG) axis (fshr, lhr, star, arα, cyp11a, cyp17a1, cyp19a, and erα); the expression changes differed among salinity levels. These results suggest that salinity influences the adverse effects of BPA on the nervous system and reproductive system of medaka. These results emphasize the importance of considering the impact of environmental factors when carrying out ecological risk assessment of pollutants.
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Affiliation(s)
- Zuchun Chen
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Xueyou Li
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Jiahao Gao
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Yue Liu
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Ning Zhang
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Yusong Guo
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Zhongduo Wang
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Zhongdian Dong
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China.
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2
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Chung KW, Key PB, Tanabe P, DeLorenzo ME. Effects of Temperature and Salinity on Perfluorooctane Sulfonate (PFOS) Toxicity in Larval Estuarine Organisms. TOXICS 2024; 12:267. [PMID: 38668490 PMCID: PMC11053673 DOI: 10.3390/toxics12040267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 03/21/2024] [Accepted: 03/31/2024] [Indexed: 04/29/2024]
Abstract
Perfluorooctane sulfonate (PFOS) is a persistent contaminant that has been found globally within the environment. Key data gaps exist in the toxicity of PFOS to marine organisms, especially estuarine species that are crucial to the food web: fish, shrimp, and mollusks. This study developed toxicity thresholds for larval estuarine species, including grass shrimp (Palaemon pugio), sheepshead minnows (Cyprinodon variegatus), mysids (Americamysis bahia), and Eastern mud snails (Tritia obsoleta). Multiple abiotic stressors (salinity and temperature) were included as variables in testing the toxicity of PFOS. Acute 96 h toxicity testing under standard test conditions of 25 °C and 20 ppt seawater yielded LC50 values of 0.919 mg/L for C. variegatus, 1.375 mg/L for A. bahia, 1.559 mg/L for T. obsoleta, and 2.011 mg/L for P. pugio. The effects of increased temperature (32 °C) and decreased salinity (10 ppt) varied with test species. PFOS toxicity for the sheepshead minnows increased with temperature but was not altered by decreased salinity. For grass shrimp and mud snails, PFOS toxicity was greater under lower salinity. The combination of higher temperature and lower salinity was observed to lower the toxicity thresholds for all species. These data demonstrate that expanding toxicity testing to include a wider range of parameters will improve the environmental risk assessment of chemical contaminants, especially for species inhabiting dynamic estuarine ecosystems.
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Affiliation(s)
- Katy W. Chung
- National Oceanic and Atmospheric Administration (NOAA), National Ocean Service, National Centers for Coastal Ocean Science, Charleston, SC 29412, USA; (P.B.K.); (P.T.); (M.E.D.)
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3
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Hutton SJ, Siddiqui S, Pedersen EI, Markgraf CY, Segarra A, Hladik ML, Connon RE, Brander SM. Multigenerational, Indirect Exposure to Pyrethroids Demonstrates Potential Compensatory Response and Reduced Toxicity at Higher Salinity in Estuarine Fish. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:2224-2235. [PMID: 38267018 PMCID: PMC10851936 DOI: 10.1021/acs.est.3c06234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 01/26/2024]
Abstract
Estuarine environments are critical to fish species and serve as nurseries for developing embryos and larvae. They also undergo daily fluctuations in salinity and act as filters for pollutants. Additionally, global climate change (GCC) is altering salinity regimes within estuarine systems through changes in precipitation and sea level rise. GCC is also likely to lead to an increased use of insecticides to prevent pests from damaging agricultural crops as their habitats and mating seasons change from increased temperatures. This underscores the importance of understanding how insecticide toxicity to fish changes under different salinity conditions. In this study, larval Inland Silversides (Menidia beryllina) were exposed to bifenthrin (1.1 ng/L), cyfluthrin (0.9 ng/L), or cyhalothrin (0.7 ng/L) at either 6 or 10 practical salinity units (PSU) for 96 h during hatching, with a subset assessed for end points relevant to neurotoxicity and endocrine disruption by testing behavior, gene expression of a select suite of genes, reproduction, and growth. At both salinities, directly exposed F0 larvae were hypoactive relative to the F0 controls; however, the indirectly exposed F1 larvae were hyperactive relative to the F1 control. This could be evidence of a compensatory response to environmentally relevant concentrations of pyrethroids in fish. Effects on development, gene expression, and growth were also observed. Overall, exposure to pyrethroids at 10 PSU resulted in fewer behavioral and endocrine disruptive effects relative to those observed in organisms at 6 PSU.
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Affiliation(s)
- Sara J. Hutton
- Department
of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Samreen Siddiqui
- Department
of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon
Marine Experiment Station, Oregon State
University, Newport, Oregon 97365, United States
| | - Emily I. Pedersen
- Department
of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon
Marine Experiment Station, Oregon State
University, Newport, Oregon 97365, United States
| | - Christopher Y. Markgraf
- Department
of Biochemistry and Biophysics, Oregon State
University, Corvallis, Oregon 97331, United States
| | - Amelie Segarra
- Department
of Anatomy, Physiology, and Cell Biology, University of California, Davis, California 95616, United States
| | - Michelle L. Hladik
- U.S.
Geological Survey, California Water Science
Center, Sacramento, California 95819, United States
| | - Richard E. Connon
- Department
of Anatomy, Physiology, and Cell Biology, University of California, Davis, California 95616, United States
| | - Susanne M. Brander
- Department
of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon
Marine Experiment Station, Oregon State
University, Newport, Oregon 97365, United States
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St Romain SJ, Basirico LM, Hutton S, Brander S, Armbrust KL. Influence of Salinity on the Partitioning Behavior of Six Commonly Used Pesticides in Fish Eggs. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024; 43:299-306. [PMID: 37921582 DOI: 10.1002/etc.5780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/17/2023] [Accepted: 10/22/2023] [Indexed: 11/04/2023]
Abstract
Salinity has been reported to impact the octanol-water partition coefficient of organic contaminants entering aquatic ecosystems. However, limited data are available on the impacts of salinity on their partitioning from the aqueous phase to adjacent organic compartments. The pesticides bifenthrin, chlorpyrifos, dicloran, myclobutanil, penconazole, and triadimefon were used to investigate the effects of salinity on their partitioning to capelin (Mallotus villosus) eggs in 5 practical salinity units (PSU) versus 25 PSU artificial seawater (ASW). The partitioning coefficient was significantly higher in 25 versus 5 PSU ASW for bifenthrin, chlorpyrifos, dicloran, penconazole, and triadimefon by 31%, 28%, 35%, 28%, and 20%, respectively, while for myclobutanil there was no significant difference. Moreover, pesticide partitioning to store-bought capelin eggs was consistent with the partitioning observed for the standard assay species, inland silversides (Menidia beryllina) eggs, after partitioning between the eggs and exposure solution had reached a state of equilibrium. The present study illustrates the importance of considering the influence of salinity on the environmental partitioning and fate of hydrophobic organic contaminants in aquatic ecosystems. Environ Toxicol Chem 2024;43:299-306. © 2023 SETAC.
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Affiliation(s)
- Scott J St Romain
- Department of Environmental Science, College of the Coast and Environment, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Laura M Basirico
- Department of Environmental Science, College of the Coast and Environment, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Sara Hutton
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, USA
| | - Susanne Brander
- Department of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon Marine Experiment Station, Oregon State University, Newport, Oregon, USA
| | - Kevin L Armbrust
- Department of Environmental Science, College of the Coast and Environment, Louisiana State University, Baton Rouge, Louisiana, USA
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5
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Donaher SE, Van den Hurk P. Ecotoxicology of the herbicide paraquat: effects on wildlife and knowledge gaps. ECOTOXICOLOGY (LONDON, ENGLAND) 2023; 32:1187-1199. [PMID: 37973658 DOI: 10.1007/s10646-023-02714-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/03/2023] [Indexed: 11/19/2023]
Abstract
Paraquat (PQ) is an organic herbicide introduced to the commercial market in 1962 and since linked to a variety of human health effects, including lung fibrosis, liver tumors, and Parkinson's disease. Although PQ is banned in the European Union, it is still frequently used in agricultural areas of the United States and Asia. The general mechanism of PQ's toxicity is the disruption of the redox cycle in cells. This mini-review summarizes our current understanding of PQ toxicity in non-target plants and animals. Among vertebrates, PQ sensitivity tends follow the pattern of fish > amphibians > mammals > birds. Aquatic plants are particularly vulnerable to PQ, with EC50 values ranging from ~28-280 μg/L. A number of convenient but non-specific biomarkers have been identified for non-target species, including the activities of antioxidant enzymes such as superoxide dismutase and catalase, histological changes in the gill structures of fish, and the upregulation of genes associated with the cytochrome p450 monooxygenase system. Significant literature gaps include a lack of data for environmentally realistic conditions (i.e., chronic, low concentration, multi-stressor), toxicity in reptiles, and population- and ecosystem-level effects. Although PQ is a useful herbicide, considering the many human and ecological health impacts, it may be time for regulators and the agricultural industry to reconsider its use.
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Affiliation(s)
- Sarah E Donaher
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC, USA.
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6
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Hutton SJ, Siddiqui S, Pedersen EI, Markgraf CY, Segarra A, Hladik ML, Connon RE, Brander SM. Comparative behavioral ecotoxicology of Inland Silverside larvae exposed to pyrethroids across a salinity gradient. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159398. [PMID: 36257430 DOI: 10.1016/j.scitotenv.2022.159398] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 10/05/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
Pyrethroids, a class of commonly used insecticides, are frequently detected in aquatic environments, including estuaries. The influence that salinity has on organism physiology and the partitioning of hydrophobic chemicals, such as pyrethroids, has driven interest in how toxicity changes in saltwater compared to freshwater. Early life exposures in fish to pyrethroids cause toxicity at environmentally relevant concentrations, which can alter behavior. Behavior is a highly sensitive endpoint that influences overall organism fitness and can be used to detect toxicity of environmentally relevant concentrations of aquatic pollutants. Inland Silversides (Menidia beryllina), a commonly used euryhaline model fish species, were exposed from 5 days post fertilization (~1-day pre-hatch) for 96 h to six pyrethroids: bifenthrin, cyfluthrin, cyhalothrin, cypermethrin, esfenvalerate and permethrin. Exposures were conducted at three salinities relevant to brackish, estuarine habitat (0.5, 2, and 6 PSU) and across 3 concentrations, either 0.1, 1, 10, and/or 100 ng/L, plus a control. After exposure, Inland Silversides underwent a behavioral assay in which larval fish were subjected to a dark and light cycle stimuli to determine behavioral toxicity. Assessment of total distanced moved and thigmotaxis (wall hugging), used to measure hyper/hypoactivity and anxiety like behavior, respectively, demonstrate that even at the lowest concentration of 0.1 ng/L pyrethroids can induce behavioral changes at all salinities. We found that toxicity decreased as salinity increased for all pyrethroids except permethrin. Additionally, we found evidence to suggest that the relationship between log KOW and thigmotaxis is altered between the lower and highest salinities.
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Affiliation(s)
- Sara J Hutton
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, United States of America.
| | - Samreen Siddiqui
- Department of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon Marine Experiment Station, Oregon State University, Newport, OR 97365, United States of America
| | - Emily I Pedersen
- Department of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon Marine Experiment Station, Oregon State University, Newport, OR 97365, United States of America
| | - Christopher Y Markgraf
- Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, United States of America
| | - Amelie Segarra
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, CA 95616, United States of America
| | - Michelle L Hladik
- U.S. Geological Survey, California Water Science Center, Sacramento, CA 95819, United States of America
| | - Richard E Connon
- Department of Anatomy, Physiology and Cell Biology, University of California, Davis, CA 95616, United States of America
| | - Susanne M Brander
- Department of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon Marine Experiment Station, Oregon State University, Newport, OR 97365, United States of America
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7
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Brander SM, White JW, DeCourten BM, Major K, Hutton SJ, Connon RE, Mehinto A. Accounting for transgenerational effects of toxicant exposure in population models alters the predicted long-term population status. ENVIRONMENTAL EPIGENETICS 2022; 8:dvac023. [PMID: 36518876 PMCID: PMC9730329 DOI: 10.1093/eep/dvac023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/12/2022] [Accepted: 11/01/2022] [Indexed: 06/04/2023]
Abstract
Acute environmental stressors such as short-term exposure to pollutants can have lasting effects on organisms, potentially impacting future generations. Parental exposure to toxicants can result in changes to the epigenome (e.g., DNA methylation) that are passed down to subsequent, unexposed generations. However, it is difficult to gauge the cumulative population-scale impacts of epigenetic effects from laboratory experiments alone. Here, we developed a size- and age-structured delay-coordinate population model to evaluate the long-term consequences of epigenetic modifications on population sustainability. The model emulated changes in growth, mortality, and fecundity in the F0, F1, and F2 generations observed in experiments in which larval Menidia beryllina were exposed to environmentally relevant concentrations of bifenthrin (Bif), ethinylestradiol (EE2), levonorgestrel (LV), or trenbolone (TB) in the parent generation (F0) and reared in clean water up to the F2 generation. Our analysis suggests potentially dramatic population-level effects of repeated, chronic exposures of early-life stage fish that are not captured by models not accounting for those effects. Simulated exposures led to substantial declines in population abundance (LV and Bif) or near-extinction (EE2 and TB) with the exact trajectory and timeline of population decline dependent on the combination of F0, F1, and F2 effects produced by each compound. Even acute one-time exposures of each compound led to declines and recovery over multiple years due to lagged epigenetic effects. These results demonstrate the potential for environmentally relevant concentrations of commonly used compounds to impact the population dynamics and sustainability of an ecologically relevant species and model organism.
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Affiliation(s)
- Susanne M Brander
- *Correspondence address. Department of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon Marine Experiment Station, Oregon State University, 2030 SE Marine Science Drive, Newport, OR 97365, USA. Tel: +541-737-5413; E-mail:
| | - J Wilson White
- Department of Fisheries, Wildlife, and Conservation Sciences, Coastal Oregon Marine Experiment Station, Oregon State University, Newport, OR 97365, USA
| | | | - Kaley Major
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, USA
| | - Sara J Hutton
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, USA
| | - Richard E Connon
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95656, USA
| | - Alvine Mehinto
- Toxicology Department, Southern California Coastal Water Research Project, Costa Mesa, CA 92626, USA
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8
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Siddiqui S, Dickens JM, Cunningham BE, Hutton SJ, Pedersen EI, Harper B, Harper S, Brander SM. Internalization, reduced growth, and behavioral effects following exposure to micro and nano tire particles in two estuarine indicator species. CHEMOSPHERE 2022; 296:133934. [PMID: 35176295 PMCID: PMC9071364 DOI: 10.1016/j.chemosphere.2022.133934] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 02/01/2022] [Accepted: 02/07/2022] [Indexed: 05/19/2023]
Abstract
Synthetic rubber emissions from automobile tires are common in aquatic ecosystems. To assess potential impacts on exposed organisms, early life stages of the estuarine indicator species Inland Silverside (Menidia beryllina) and mysid shrimp (Americamysis bahia) were exposed to three tire particle (TP) concentrations at micro and nano size fractions (0.0038, 0.0378 and 3.778 mg/L in mass concentrations for micro size particles), and separately to leachate, across a 5-25 PSU salinity gradient. Following exposure, M. beryllina and A. bahia had significantly altered swimming behaviors, such as increased freezing, changes in positioning, and total distance moved, which could lead to an increased risk of predation and foraging challenges in the wild. Growth for both A. bahia and M. beryllina was reduced in a concentration-dependent manner when exposed to micro-TP, whereas M. beryllina also demonstrated reduced growth when exposed to nano-TP (except lowest concentration). TP internalization was dependent on the exposure salinity in both taxa. The presence of adverse effects in M. beryllina and A. bahia indicate that even at current environmental levels of tire-related pollution, which are expected to continue to increase, aquatic ecosystems may be experiencing negative impacts.
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Affiliation(s)
- S Siddiqui
- Fisheries, Wildlife, and Conservation Sciences; Coastal Oregon Marine Experiment Station, College of Agricultural and Life Sciences, Oregon State University, 97365, USA.
| | - J M Dickens
- Marine Resources Management Program, College of Earth, Atmospheric, and Oceanic Sciences, Oregon State University Corvallis, Oregon, 97331, USA
| | - B E Cunningham
- Environmental and Molecular Toxicology, College of Agricultural and Life Sciences, Oregon State University, 97331, USA
| | - S J Hutton
- Environmental and Molecular Toxicology, College of Agricultural and Life Sciences, Oregon State University, 97331, USA
| | - E I Pedersen
- Fisheries, Wildlife, and Conservation Sciences; Coastal Oregon Marine Experiment Station, College of Agricultural and Life Sciences, Oregon State University, 97365, USA
| | - B Harper
- Environmental and Molecular Toxicology, College of Agricultural and Life Sciences, Oregon State University, 97331, USA
| | - S Harper
- Environmental and Molecular Toxicology, College of Agricultural and Life Sciences, Chemical, Biological and Environmental Engineering, College of Engineering, Oregon State University, 97331, USA
| | - S M Brander
- Fisheries, Wildlife, and Conservation Sciences; Coastal Oregon Marine Experiment Station, College of Agricultural and Life Sciences, Oregon State University, 97365, USA
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Xing SY, Li ZH, Li P, You H. A Mini-review of the Toxicity of Pollutants to Fish Under Different Salinities. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 108:1001-1005. [PMID: 35486156 DOI: 10.1007/s00128-022-03528-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
In recent years, with the development of the global economy, water pollution has increased. Pollutants migrate, accumulate, and diffuse in aquatic environments. Most of the pollutants eventually enter aquatic organisms. The accumulation of pollutants affects the development and reproduction of organisms, and many pollutants have teratogenic, carcinogenic, and/or mutagenic effects. Aquatic organisms in estuaries and coastal areas are under pressure due to both salinity and pollutants. Among them, salinity, as an environmental factor, may affect the behavior of pollutants in the aquatic environment, causing changes in their toxic effects on fishes. Salinity also directly affects the growth and development of fishes. Therefore, this paper focuses on metals and organic pollutants and discusses the toxic effects of pollutants on fish under different salinities. This research is of great significance to environmental protection and ecological risk assessment of aquatic environments.
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Affiliation(s)
- Shao-Ying Xing
- Marine College, Shandong University, 264209, Weihai, Shandong, P.R. China
| | - Zhi-Hua Li
- Marine College, Shandong University, 264209, Weihai, Shandong, P.R. China
| | - Ping Li
- Marine College, Shandong University, 264209, Weihai, Shandong, P.R. China
| | - Hong You
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 150090, Harbin, P. R. China.
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Dong Z, Chen Y, Li X, Zhang N, Guo Y, Liang YQ, Wang Z. Norethindrone alters growth, sex differentiation and gene expression in marine medaka (Oryzias melastigma). ENVIRONMENTAL TOXICOLOGY 2022; 37:1211-1221. [PMID: 35098644 DOI: 10.1002/tox.23477] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 12/27/2021] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
Norethindrone (NET) is a widely used synthetic progestin, which appears in water environments and threatens aquatic organisms. In this study, marine medaka (Oryzias melastigma) larvae were exposed to 7.6 and 80.1 ng/L NET for 190 days. The effects of NET on growth, sex differentiation, gonad histology and transcriptional expression profiles of hypothalamic-pituitary-gonadal (HPG) axis-related genes were determined. The results showed that exposure to 80.1 ng/L NET caused an all-male marine medaka population and significantly decreased the growth of males. Exposure to 7.6 ng/L NET increased the ratio of males/females in the marine medaka population, decreased the growth of males and delayed the ovary maturation in females. However, the sperm maturation was accelerated by 7.6 or 80.1 ng/L NET. In females, the transcription levels of cytochrome P450 aromatase (cyp19a1a) and progesterone receptor (pgr) in ovaries, glucocorticoid receptor (gr) and vitellogenin (vtg) in livers were suppressed after exposure to 7.6 ng/L NET, which may cause delayed ovary maturation. In males, NET significantly decreased the transcription levels of follicle stimulating hormone β (fshβ) and Luteinizing hormone β (lhβ)in the brain, Estrogen receptor β (erβ),gr and pgr in the liver, and vitellogenin receptor (vtgr) in the testes, while NET of 80.1 ng/L led to a significant up-regulation of steroidogenic acute regulatory protein (star) in the testes of males. These results showed that NET could influence growth, sex differentiation and gonadal maturation and significantly alter the transcriptional expression levels of HPG axis-related genes.
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Affiliation(s)
- Zhongdian Dong
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, China
- Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, College of Fishery, Guangdong Ocean University, Zhanjiang, China
| | - Yuebi Chen
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, China
| | - Xueyou Li
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, China
| | - Ning Zhang
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, China
| | - Yusong Guo
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, China
| | - Yan-Qiu Liang
- Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, China
| | - Zhongduo Wang
- Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, China
- State Laboratory of Developmental Biology of Freshwater Fish, College of Life Sciences, Hunan Normal University School, Changsha, China
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11
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Reddy V, McCarthy M, Raval AP. Xenoestrogens impact brain estrogen receptor signaling during the female lifespan: A precursor to neurological disease? Neurobiol Dis 2021; 163:105596. [PMID: 34942334 DOI: 10.1016/j.nbd.2021.105596] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 12/08/2021] [Accepted: 12/18/2021] [Indexed: 02/07/2023] Open
Abstract
Xenoestrogens, foreign synthetic chemicals mimicking estrogens, are lurking in our surroundings. Climate change may alter their toxicity and bioavailability. Since xenoestrogens have extremely high lipid solubility and are structurally similar to natural endogenous estrogens, they can bind to estrogen receptors (ERs) -alpha (ER-α) and -beta (ER-β). Scientific evidence accumulated over the past decades have suggested that natural 17β-estradiol (E2; a potent estrogen), via activation of its receptors, plays a pivotal role in regulation of brain development, differentiation, metabolism, synaptic plasticity, neuroprotection, cognition, anxiety, body temperature, feeding and sexual behavior. In the brain, ER-β is predominantly expressed in the various regions, including cerebral cortex and hippocampus, that have been shown to play a key role in cognition. Therefore, disturbances in function of ER-β mediated E2 signaling by xenoestrogens can lead to deleterious effects that potentiate a variety of neurological diseases starting from prenatal to post-menopause in women. The goal of this review is to identify the possible neurological effects of xenoestrogens that can alter estrogen receptor-mediated signaling in the brain during different stages of the female lifespan.
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Affiliation(s)
- Varun Reddy
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratory, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, 33136, USA; Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, 33136, USA
| | - Micheline McCarthy
- Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, 33136, USA
| | - Ami P Raval
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratory, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, 33136, USA; Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, 33136, USA.
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