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Alleviation of copper toxicity in Daphnia magna by hydrogen nanobubble water.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-22 , DOI: 10.1016/j.jhazmat.2020.122155 Wenhong Fan 1 , You Zhang 2 , Shu Liu 1 , Xiaomin Li 2 , Jiayao Li 2
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-01-22 , DOI: 10.1016/j.jhazmat.2020.122155 Wenhong Fan 1 , You Zhang 2 , Shu Liu 1 , Xiaomin Li 2 , Jiayao Li 2
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As a novel antioxidant, hydrogen water has been widely used to alleviate oxidative stress in plants as well as in the medical field. However, the function of hydrogen water in environmental toxicology remains unknown. In this study, combining nanobubbles (NBs) and hydrogen water, we investigate the effect and mechanism of hydrogen NB water on copper induced acute toxicity to water fleas (Daphnia magna). The 24-h lethal Cu concentrations at which 50 % of the population die were 84 μg/L in hydrogen NB water and 45 μg/L in control water, confirming that hydrogen NB water effectively alleviated acute Cu toxicity in D. magna. The results were consistent with a significant reduction of Cu uptake and decrease of Cu accumulation in D. magna. As confirmed in fluorescence spectrophotometry and high-content screening system analysis, the hydrogen NB water also significantly reduced the oxidative damage and improved Cu tolerance in D. magna. From the results, it can be inferred that hydrogen NB water alleviates Cu stress in D. magna by depressing Cu bioaccumulation and reducing oxidative stress. The results provide basic data of hydrogen NB water for environmental toxicologists, and also a reference for the application of hydrogen NB water in the environment.
中文翻译：
氢纳米气泡水减轻水蚤中铜的毒性。
作为一种新型的抗氧化剂，氢水已被广泛用于缓解植物以及医学领域的氧化应激。然而，氢水在环境毒理学中的功能仍然未知。在这项研究中，结合纳米气泡（NBs）和氢水，我们研究了氢NB水对铜诱导的对水蚤（Daphnia magna）的急性毒性的作用和机理。在NB氢水中，有50％的人口死亡的24小时致死Cu浓度为84μg/ L，在对照水中为45μg/ L，证实了NB氢水有效减轻了D. magna的急性Cu毒性。结果与大麦（D. magna）中铜的吸收显着减少和铜积累的减少相一致。如荧光分光光度法和高内涵筛选系统分析所证实的，氢NB水还显着降低了D. magna中的氧化损伤并提高了Cu耐受性。从结果可以推断出，氢NB水通过抑制Cu的生物蓄积并降低氧化应激而减轻了D.magna中的Cu胁迫。研究结果为环境毒理学家提供了NB水的基本数据，为NB水在环境中的应用提供了参考。
更新日期：2020-01-22
中文翻译：
氢纳米气泡水减轻水蚤中铜的毒性。
作为一种新型的抗氧化剂，氢水已被广泛用于缓解植物以及医学领域的氧化应激。然而，氢水在环境毒理学中的功能仍然未知。在这项研究中，结合纳米气泡（NBs）和氢水，我们研究了氢NB水对铜诱导的对水蚤（Daphnia magna）的急性毒性的作用和机理。在NB氢水中，有50％的人口死亡的24小时致死Cu浓度为84μg/ L，在对照水中为45μg/ L，证实了NB氢水有效减轻了D. magna的急性Cu毒性。结果与大麦（D. magna）中铜的吸收显着减少和铜积累的减少相一致。如荧光分光光度法和高内涵筛选系统分析所证实的，氢NB水还显着降低了D. magna中的氧化损伤并提高了Cu耐受性。从结果可以推断出，氢NB水通过抑制Cu的生物蓄积并降低氧化应激而减轻了D.magna中的Cu胁迫。研究结果为环境毒理学家提供了NB水的基本数据，为NB水在环境中的应用提供了参考。
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