首页> 外文期刊>Fish Physiology and Biochemistry >Acute effects of cadmium on liver phase I and phase II enzymes and metallothionein accumulation on sea bream Sparus aurata
【24h】

Acute effects of cadmium on liver phase I and phase II enzymes and metallothionein accumulation on sea bream Sparus aurata

机译:镉对鲷鱼Sparus aurata肝脏I,II期酶和金属硫蛋白积累的急性影响

获取原文
获取原文并翻译 | 示例
           

摘要

This research was designed to study Sparus aurata (sea bream) biotransformation and detoxification responses to acute exposure to cadmium (Cd). Sexually immature gilthead sea bream were treated by intraperitoneal injection of Cd chloride (200 μg kg?1) for 6, 12, 24 and 48 h. Cd accumulation was quantified in sea bream liver by graphite furnace atomic absorption spectroscopy after the various exposure periods. The following biological responses were measured: (1) ethoxyresorufin-O-deethylase (EROD) activity as phase I biotransformation parameter, (2) liver glutathione-S-transferase (GST) activity as a phase II conjugation enzyme and metallothionein (MT) content as specific response to Cd contamination. Cd bioaccumulation in the liver resulted in an increasing uptake up to 10.3 μg g?1 wet weight after 48 h of exposure. EROD showed a significant activation only after 6 h exposure and a return to control levels after 12 h. GST revealed significant activation starting from 12 h exposure. MT accumulation in liver showed the same behavior as GST activation.
机译:这项研究旨在研究鲷鱼(Sparus aurata)的生物转化和对急性暴露于镉(Cd)的排毒反应。通过腹腔注射氯化镉(200μgkg?1 )治疗性不成熟的金头鲷6、12、24和48小时。在不同的暴露时间后,通过石墨炉原子吸收光谱法对鲷鱼肝中的镉积累进行定量。测量了以下生物学反应:(1)乙氧基异佛手菌素-O-脱乙基酶(EROD)活性作为I期生物转化参数,(2)肝谷胱甘肽S-转移酶(GST)活性作为II期结合酶和金属硫蛋白(MT)含量作为对镉污染的具体反应。肝脏中镉的生物积累导致暴露48 h后的吸收量增加至10.3μgg?1 湿重。 EROD仅在暴露6 h后才显示出明显的激活,并在12 h后恢复到对照水平。 GST显示从暴露12 h开始有明显的活化作用。肝脏中MT的积累表现出与GST激活相同的行为。

著录项

  • 来源
    《Fish Physiology and Biochemistry》 |2008年第3期|201-207|共7页
  • 作者单位

    Laboratoire de Biochimie et de Toxicologie Environnementale Institut Supérieure Agronomique Chott-Mariem Sousse Tunisia;

    Laboratoire de Biochimie et de Toxicologie Environnementale Institut Supérieure Agronomique Chott-Mariem Sousse Tunisia;

    Laboratoire de Biochimie et de Toxicologie Environnementale Institut Supérieure Agronomique Chott-Mariem Sousse Tunisia;

    Laboratoire de Physico-Toxico Chimie des Systèmes Naturels Université Bordeaux I Talence Cedex France;

    Laboratory of Marine Biotechnology INSTM Monastir Monastir 5000 Tunisia;

    Laboratoire de Physico-Toxico Chimie des Systèmes Naturels Université Bordeaux I Talence Cedex France;

    Laboratoire de Biochimie et de Toxicologie Environnementale Institut Supérieure Agronomique Chott-Mariem Sousse Tunisia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Acute exposure; Cadmium; EROD activity; GST activity; Metallothionein;

    机译:急性暴露;镉;EROD活性;GST活性;金属硫蛋白;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号