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首页> 外文期刊>Environmental Science & Technology >Specific Effects of Dietary Methyl mercury and Inorganic Mercury in Zebrafish (Danio rerio) Determined by Genetic, Histological, and Metallothionein Responses
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Specific Effects of Dietary Methyl mercury and Inorganic Mercury in Zebrafish (Danio rerio) Determined by Genetic, Histological, and Metallothionein Responses

机译:遗传,组织学和金属硫蛋白反应确定斑马鱼中膳食甲基汞和无机汞的特殊作用

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摘要

A multidisciplinary approach is proposed here to compare toxicity mechanisms of methylmercury (MeHg) and inorganic mercury (iHg) in muscle, liver, and brain from zebrafish (Danio rerio). Animals were dietary exposed to (1) 50 ng Hg g~(-1), 80% as MeHg; (2) diet enriched in MeHg 10000 ng Hg g~(-1), 95% as MeHg; (3) diet enriched in iHg 10000 ng Hg g~(-1), 99% as iHg, for two months. Hg species specific bioaccumulation pathways were highlighted, with a preferential bioaccumulation of MeHg in brain and iHg in liver. In the same way, differences in genetic pattern were observed for both Hg species, (an early genetic response (7 days) for both species in the three organs and a late genetic response (62 days) for iHg) and revealed a dissimilar metabolization of both Hg species. Among the 18 studied genes involved in key metabolic pathways of the cell, major genetic responses were observed in muscle. Electron microscopy revealed damage mainly because of MeHg in muscle and also in liver tissue. In brain, high MeHg and iHg concentrations induced metallothionein production. Finally, the importance of the fish origin in ecotoxicological studies, here the seventh descent of a zebrafish line, is discussed.
机译:本文提出了一种多学科方法来比较斑马鱼(Danio rerio)在肌肉,肝脏和大脑中甲基汞(MeHg)和无机汞(iHg)的毒性机理。饮食中动物暴露于(1)50 ng Hg g〜(-1),其中80%为MeHg; (2)膳食中富含MeHg 10000 ng Hg g〜(-1),占MeHg的95%; (3)饮食中添加iHg 10000 ng Hg g〜(-1),iHg含量为99%的食物两个月。汞物种特定的生物蓄积途径被突出,其中脑中MeHg和肝脏中iHg的优先生物蓄积。以同样的方式,观察到两种汞物种的遗传模式存在差异(三个器官中两种物种的早期遗传反应(7天)和iHg晚期遗传反应(62天)),并且揭示了Hg的代谢不同。两种汞。在涉及细胞关键代谢途径的18个研究基因中,在肌肉中观察到了主要的遗传反应。电子显微镜显示损伤主要是由于肌肉中以及肝脏组织中的甲基汞引起的。在大脑中,高浓度的MeHg和iHg会诱导金属硫蛋白的产生。最后,讨论了鱼类起源在生态毒理学研究中的重要性,这里是斑马鱼品系的第七次下降。

著录项

  • 来源
    《Environmental Science & Technology》 |2015年第24期|14560-14569|共10页
  • 作者单位

    Universite de Bordeaux, EPOC, UMR CNRS 5805, Place du Dr B. Peyneau, F-33120 Arcachon, France;

    Universite de Bordeaux, EPOC, UMR CNRS 5805, Place du Dr B. Peyneau, F-33120 Arcachon, France;

    Laboratoire de Chimie Analytique, Bio-Inorganique et Environnement, Institut des Sciences Analytiques et de Physico-Chimie pour 1'Environnement et les Materiaux (IPREM), CNRS-UPPA-UMR-5254, Helioparc, 2 Avenue du President Pierre Angot, F-64053 Pau, France;

    Laboratoire de Chimie Analytique, Bio-Inorganique et Environnement, Institut des Sciences Analytiques et de Physico-Chimie pour 1'Environnement et les Materiaux (IPREM), CNRS-UPPA-UMR-5254, Helioparc, 2 Avenue du President Pierre Angot, F-64053 Pau, France;

    Laboratoire de Chimie Analytique, Bio-Inorganique et Environnement, Institut des Sciences Analytiques et de Physico-Chimie pour 1'Environnement et les Materiaux (IPREM), CNRS-UPPA-UMR-5254, Helioparc, 2 Avenue du President Pierre Angot, F-64053 Pau, France;

    Universite de Bordeaux, EPOC, UMR CNRS 5805, Place du Dr B. Peyneau, F-33120 Arcachon, France;

    Universite de Bordeaux, EPOC, UMR CNRS 5805, Place du Dr B. Peyneau, F-33120 Arcachon, France;

    Universite de Bordeaux, EPOC, UMR CNRS 5805, Place du Dr B. Peyneau, F-33120 Arcachon, France;

    GET, IRD, F-31400 Toulouse, France,Observatoire Midi-Pyrenees, Laboratoire de Geosciences Environnement Toulouse, Universite Paul Sabatier Toulouse Ⅲ, 14 avenue Edouard Belin, 31400 Toulouse, France;

    Laboratoire de Chimie Analytique, Bio-Inorganique et Environnement, Institut des Sciences Analytiques et de Physico-Chimie pour 1'Environnement et les Materiaux (IPREM), CNRS-UPPA-UMR-5254, Helioparc, 2 Avenue du President Pierre Angot, F-64053 Pau, France;

    CNRS, EPOC, UMR 5805, F-33120 Arcachon, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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