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Mitigation of nitrite toxicity by increased salinity is associated with multiple physiological responses: A case study using an economically important model species, the juvenile obscure puffer (Takifugu obscurus)

机译:盐度增加可减轻亚硝酸盐毒性,这与多种生理反应有关:使用经济上重要的模型物种,即幼稚的河豚(Takifugu obscurus)进行的案例研究

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摘要

Nitrite is a common pollutant in water and is highly toxic to aquatic animals. To reveal the mechanism of salinity in attenuating nitrite toxicity to fish, we measured the physiological responses of juvenile Takifugu obscurus exposed to nitrite concentrations (0, 10, 20, 50, and 100 mg/L) under different salinity levels (0,10, and 20 ppt) for 96 h. Salinity increased the survival rates of juvenile T. obscurus exposed to nitrite. Changes in key hematological parameters, antioxidant system, malondialdehyde, Na+/K+ ATPase, and HSP70 indicated that nitrite induced considerable damage to juveniles; salinity mitigated the harmful effects. This finding reflects similar changing trends in both antioxidants and their gene expressions among different tissues. We applied an overall index, an integrated biomarker response (IBR), that increased under high nitrite condition but recovered to the normal levels under salinity treatment. Analysis of the selected detection indices and IBR values showed that the overall mitigating effect of salinity on nitrite toxicity seems to be at sub-cellular level and associated with complicated physiological responses. (C) 2017 Elsevier Ltd. All rights reserved.
机译:亚硝酸盐是水中的常见污染物,对水生动物有剧毒。为了揭示盐度降低亚硝酸盐对鱼类毒性的机理,我们测量了在不同盐度水平(0,10,和20 ppt),持续96小时。盐度提高了暴露于亚硝酸盐的暗色T. obscurus的成活率。关键血液学参数,抗氧化剂系统,丙二醛,Na + / K + ATPase和HSP70的变化表明,亚硝酸盐对未成年人造成了相当大的损害。盐度减轻了有害影响。这一发现反映了不同组织之间抗氧化剂及其基因表达的相似变化趋势。我们应用了整体指标,即综合生物标志物响应(IBR),该指标在高亚硝酸盐条件下增加,但在盐度处理下恢复到正常水平。对所选检测指标和IBR值的分析表明,盐度对亚硝酸盐毒性的总体缓解作用似乎在亚细胞水平上,并且与复杂的生理反应有关。 (C)2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental Pollution》 |2018年第1期|137-145|共9页
  • 作者单位

    Nanjing Normal Univ, Sch Biol Sci, Jiangsu Prov Key Lab Biodivers & Biotechnol, 1 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Biol Sci, Jiangsu Prov Key Lab Biodivers & Biotechnol, 1 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Biol Sci, Jiangsu Prov Key Lab Biodivers & Biotechnol, 1 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Biol Sci, Jiangsu Prov Key Lab Biodivers & Biotechnol, 1 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Biol Sci, Jiangsu Prov Key Lab Biodivers & Biotechnol, 1 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China;

    Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake & Environm, 73 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Sch Biol Sci, Jiangsu Prov Key Lab Biodivers & Biotechnol, 1 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nitrite; Salinity; Obscure puffer; Oxidative stress; Hematological parameters;

    机译:亚硝酸盐;盐度;暗淡的河豚;氧化应激;血液学参数;

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