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Chen J, Wei Y, Zhou J, Cao X, Yuan R, Lu Y, Guo Y, Shao X, Sun W, Jia M, Chen X. Tributyltin-induced oxidative stress causes developmental damage in the cardiovascular system of zebrafish (Danio rerio). ENVIRONMENTAL RESEARCH 2024; 252:118811. [PMID: 38555090 DOI: 10.1016/j.envres.2024.118811] [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: 01/09/2024] [Revised: 03/25/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
Tributyltin (TBT) can be used as an antifouling agent with anticorrosive, antiseptic and antifungal properties and is widely used in wood preservation and ship painting. However, it has recently been found that TBT can be harmful to aquatic organisms. In this study, to gain insight into the effects of TBT with respect to the development of the cardiovascular system in zebrafish embryos, zebrafish embryos were exposed to different concentrations of TBT solutions (0.2 μg/L, 1 μg/L, and 2 μg/L) at 2 h post-fertilization (hpf) TBT exposure resulted in decreased hatchability and heart rate, deformed features such as pericardial edema, yolk sac edema, and spinal curvature in zebrafish embryos, and impaired heart development. Expression of cardiac development-related genes (vmhc, myh6, nkx2.5, tbx5a, gata4, tbx2b, nppa) is dysregulated. Transgenic zebrafish Tg (fli1: EGFP) were used to explore the effects of TBT exposure on vascular development. It was found that TBT exposure could lead to impaired development of intersegmental vessels (ISVs), common cardinal vein (CCV), subintestinal vessels (SIVs) and cerebrovascular. The expression of vascular endothelial growth factor (VEGF) signaling pathway-related genes (flt1, flt4, kdr, vegfa) was downregulated. Biochemical indices showed that ROS and MDA levels were significantly elevated and that SOD and CAT activities were significantly reduced. The expression of key genes for prostacyclin synthesis (pla2, ptgs2a, ptgs2b, ptgis, ptgs1) is abnormal. Therefore, it is possible that oxidative stress induced by TBT exposure leads to the blockage of arachidonic acid (AA) production in zebrafish embryos, which affects prostacyclin synthesis and consequently the normal development of the heart and blood vessels in zebrafish embryos.
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Affiliation(s)
- Jianjun Chen
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Yinyin Wei
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Jiameng Zhou
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Xianglin Cao
- College of Fisheries, Henan Normal University, Xinxiang, 453007, China
| | - Rongjie Yuan
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Yaoyajie Lu
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Yi Guo
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Xue Shao
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Weidi Sun
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Mengtao Jia
- College of Life Science, Henan Normal University, Xinxiang, 453007, China
| | - Xiuli Chen
- Ecological Environment College, Baotou Teachers' College, Baotou, 014030, China.
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Shaw K, Therrien M, Lu C, Liu X, Trudeau VL. Mutation of brain aromatase disrupts spawning behavior and reproductive health in female zebrafish. Front Endocrinol (Lausanne) 2023; 14:1225199. [PMID: 37435485 PMCID: PMC10332311 DOI: 10.3389/fendo.2023.1225199] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 06/13/2023] [Indexed: 07/13/2023] Open
Abstract
Aromatase (Cyp19a1) is the steroidogenic enzyme that converts androgens into bioactive estrogens, and hence is in a pivotal position to mediate reproduction and sexual behavior. In teleosts, there are two aromatase paralogs: cyp19a1a that is highly expressed in granulosa and Leydig cells in the gonads with critical function in sexual differentiation of the ovary, and cyp19a1b that is highly expressed in radial glial cells in the brain with unknown roles in reproduction. Cyp19a1 -/- mutant zebrafish lines were used to investigate the importance of the cyp19a1 paralogs for spawning behavior and offspring survival and early development. Mutation of cyp19a1b was found to increase the latency to the first oviposition in females. Mutation of cyp19a1b in females also increased the number of eggs spawned; however, significantly more progeny died during early development resulting in no net increase in female fecundity. This finding suggests a higher metabolic cost of reproduction in cyp19a1b -/- mutant females. In males, the combined mutation of both cyp19a1 paralogs resulted in significantly lower progeny survival rates, indicating a critical function of cyp19a1 during early larval development. These data establish the specific importance of cyp19a1b for female spawning behavior and the importance of the cyp19a1 paralogs for early larval survival.
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Affiliation(s)
- Katherine Shaw
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Mylène Therrien
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Chunyu Lu
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Xiaochun Liu
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
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Huang W, Wu T, Wu R, Peng J, Zhang Q, Shi X, Wu K. Fish to learn: insights into the effects of environmental chemicals on eye development and visual function in zebrafish. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27629-3. [PMID: 37195602 DOI: 10.1007/s11356-023-27629-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 05/10/2023] [Indexed: 05/18/2023]
Abstract
Vision is the most essential sense system for the human being. Congenital visual impairment affects millions of people globally. It is increasingly realized that visual system development is an impressionable target of environmental chemicals. However, due to inaccessibility and ethical issues, the use of humans and other placental mammals is constrained, which limits our better understanding of environmental factors on ocular development and visual function in the embryonic stage. Therefore, as complementing laboratory rodents, zebrafish has been the most frequently employed to understand the effects of environmental chemicals on eye development and visual function. One of the major reasons for the increasing use of zebrafish is their polychromatic vision. Zebrafish retinas are morphologically and functionally analogous to those of mammalian, as well as evolutionary conservation among vertebrate eye. This review provides an update on harmful effects from exposure to environmental chemicals, involving metallic elements (ions), metal-derived nanoparticles, microplastics, nanoplastics, persistent organic pollutants, pesticides, and pharmaceutical pollutants on the eye development and visual function in zebrafish embryos. The collected data provide a comprehensive understanding of environmental factors on ocular development and visual function. This report highlights that zebrafish is promising as a model to identify hazardous toxicants toward eye development and is hopeful for developing preventative or postnatal therapies for human congenital visual impairment.
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Affiliation(s)
- Wenlong Huang
- Guangdong Provincial Key Laboratory of Breast Cancer Diagnosis and Treatment, Department of Preventive Medicine, Shantou University Medical College, Xinling Rd., No. 22, Shantou, 515041, Guangdong, China
- Department of Forensic Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Tianjie Wu
- Department of Anaesthesiology, Shantou Central Hospital, Affiliated Shantou Hospital of Sun Yat-Sen University, Shantou, 515041, Guangdong, China
| | - Ruotong Wu
- School of Life Science, Xiamen University, Xiamen, 361102, Fujian, China
| | - Jiajun Peng
- Guangdong Provincial Key Laboratory of Breast Cancer Diagnosis and Treatment, Department of Preventive Medicine, Shantou University Medical College, Xinling Rd., No. 22, Shantou, 515041, Guangdong, China
| | - Qiong Zhang
- Guangdong Provincial Key Laboratory of Breast Cancer Diagnosis and Treatment, Department of Preventive Medicine, Shantou University Medical College, Xinling Rd., No. 22, Shantou, 515041, Guangdong, China
| | - Xiaoling Shi
- Guangdong Provincial Key Laboratory of Breast Cancer Diagnosis and Treatment, Department of Preventive Medicine, Shantou University Medical College, Xinling Rd., No. 22, Shantou, 515041, Guangdong, China
| | - Kusheng Wu
- Guangdong Provincial Key Laboratory of Breast Cancer Diagnosis and Treatment, Department of Preventive Medicine, Shantou University Medical College, Xinling Rd., No. 22, Shantou, 515041, Guangdong, China.
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Guo RY, Xiang J, Wang LJ, Li EC, Zhang JL. Tributyltin exposure disrupted the locomotor activity rhythms in adult zebrafish (Danio rerio) and the mechanism involved. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 251:106287. [PMID: 36067546 DOI: 10.1016/j.aquatox.2022.106287] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/29/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
The fish circadian rhythm system might be an emerging target of tributyltin (TBT), however, the mechanism by which TBT interferes with the circadian rhythm is poorly understood. Therefore, in the present study, zebrafish were used to assess the effects of TBT at environmental concentrations (1 and 10 ng/L) on locomotor activity rhythm. Furthermore, we focused on the visual system to explore the potential mechanism involved. After 90 d of exposure, TBT disturbed the locomotor activity rhythms in zebrafish, which manifested as: (1) low activities and lethargy during the arousing period; (2) inability to fall asleep quickly and peacefully during the period of latency to sleep; and (3) no regular "waves" of locomotor activities during the active period. After TBT exposure, the histological structure of the eyes significantly changed, the boundary between layers became blurred, and the melanin concentrations significantly decreased. Using KEGG and GSEA pathway analyses, the differentially expressed genes in the eyes screened by transcriptomics were significantly enriched in the tyrosine metabolism pathway and retinol metabolism pathway. Furthermore, a decrease in melanin and disruption of retinoic acid were found after TBT exposure, which would affect the reception of phototransduction, and then interfere with the circadian rhythm in fish. The disruption of the circadian rhythm of fish by aquatic pollutants would decrease their ecological adaptability, which should be considered in future research.
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Affiliation(s)
- Rui-Ying Guo
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan 571158, China
| | - Jing Xiang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan 571158, China
| | - Li-Jun Wang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan 571158, China
| | - Er-Chao Li
- College of Ocean Sciences, Hainan University, Haikou, Hainan, China
| | - Ji-Liang Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan 571158, China.
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Jessup WH, Wiegand J, Delbridge-Perry M, MacAvoy SE, Connaughton VP. Developmental effects of siloxane exposure in zebrafish: a comparison study using laboratory-mixed and environmental water samples. J Appl Toxicol 2022; 42:1986-2004. [PMID: 35863877 DOI: 10.1002/jat.4369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/14/2022] [Accepted: 07/19/2022] [Indexed: 11/08/2022]
Abstract
Siloxanes are used in personal care, biomedical, and industrial products. Their worldwide use and persistence in the environment cause consistent exposure for both humans and aquatic animals. Two siloxane congeners, decamethylcyclopentasiloxane (D5; CAS 541-02-6) and octamethylcyclotetrasiloxane (D4; CAS 556-67-2), are among the most prevalent, with measurable levels in air, sediment, water, and biological samples. However, few studies have examined the impact of developmental (embryo/larva) exposure. To address this gap, we performed parallel experiments using wildtype zebrafish (Danio rerio). One set of experiments used laboratory-mixed individual solutions containing either D4, D5, or 2,4,6,8-tetramethylcyclotetrasiloxane (D4 H ; CAS 2370-88-9); the other used environmental water samples containing a mixture of siloxanes, including D4 and D5. These samples were collected from Bladensburg Waterfront Park (BWP) a site along the Anacostia River, Washington, DC. In both experiments, zebrafish (24-48 hours postfertilization, hpf) were exposed until 7 or 14 days (d)pf. Chronic exposure to D4, D5, or BWP water until 7 dpf caused stress-like behaviors and reduced swim velocities; anatomical differences were noted only in BWP-exposed larvae. At 14 dpf, BWP-treated larvae still showed slower swimming velocities and increased immobility; anatomical differences were no longer evident and thigmotactic behavior was reduced. D4 and D5-exposed larvae did not survive after 10 dpf. Larvae exposed to D4 H showed no decreases in behavior or growth at either age. These results suggest early developmental sensitivity to siloxane exposure and point to the need to consider embryonic/larval endpoints when assessing aquatic contaminants.
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Affiliation(s)
| | - Jenna Wiegand
- Departments of Environmental Science, American University, Washington, DC
| | | | - Stephen E MacAvoy
- Departments of Environmental Science, American University, Washington, DC
| | - Victoria P Connaughton
- Departments of Biology, American University, Washington, DC.,Center for Neuroscience and Behavior, American University, Washington, DC
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Cohen A, Popowitz J, Delbridge-Perry M, Rowe CJ, Connaughton VP. The Role of Estrogen and Thyroid Hormones in Zebrafish Visual System Function. Front Pharmacol 2022; 13:837687. [PMID: 35295340 PMCID: PMC8918846 DOI: 10.3389/fphar.2022.837687] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 01/28/2022] [Indexed: 12/23/2022] Open
Abstract
Visual system development is a highly complex process involving coordination of environmental cues, cell pathways, and integration of functional circuits. Consequently, a change to any step, due to a mutation or chemical exposure, can lead to deleterious consequences. One class of chemicals known to have both overt and subtle effects on the visual system is endocrine disrupting compounds (EDCs). EDCs are environmental contaminants which alter hormonal signaling by either preventing compound synthesis or binding to postsynaptic receptors. Interestingly, recent work has identified neuronal and sensory systems, particularly vision, as targets for EDCs. In particular, estrogenic and thyroidogenic signaling have been identified as critical modulators of proper visual system development and function. Here, we summarize and review this work, from our lab and others, focusing on behavioral, physiological, and molecular data collected in zebrafish. We also discuss different exposure regimes used, including long-lasting effects of developmental exposure. Overall, zebrafish are a model of choice to examine the impact of EDCs and other compounds targeting estrogen and thyroid signaling and the consequences of exposure in visual system development and function.
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Affiliation(s)
- Annastelle Cohen
- Department of Biology, American University, Washington, DC, WA, United States
| | - Jeremy Popowitz
- Department of Biology, American University, Washington, DC, WA, United States
| | | | - Cassie J. Rowe
- Department of Biology, American University, Washington, DC, WA, United States,Center for Neuroscience and Behavior, American University, Washington, DC, WA, United States
| | - Victoria P. Connaughton
- Department of Biology, American University, Washington, DC, WA, United States,Center for Neuroscience and Behavior, American University, Washington, DC, WA, United States,*Correspondence: Victoria P. Connaughton,
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