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首页> 外文期刊>Environmental Science & Technology >Remote Biodegradation of Ge-Imogolite Nanotubes Controlled by the Iron Homeostasis of Pseudomonas brassicacearum
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Remote Biodegradation of Ge-Imogolite Nanotubes Controlled by the Iron Homeostasis of Pseudomonas brassicacearum

机译：铜绿假单胞菌铁稳态控制的Ge-Imogolite纳米管的远程生物降解。

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摘要

The toxicity of high-aspect-ratio nanomaterials (HARNs) is often associated with oxidative stress. The essential nutrient Fe may also be responsible of oxidative stress through the production of reactive oxygen species. In the present study, it has been examined to what extent adding Fenton reaction promoting Fe impacted the toxicity of an alumino-germanate model HARN. Structural addition of only 0.95% wt Fe to Ge-imogolite not only alleviated the toxicity observed in the case of Fe-free nanotubes but also stimulated bacterial growth. This was attributed to the metabolization of siderophore-mobilized Fe from the nanotube structure. This was evidenced by the regulation of the homeostasis-monitoring intracellular Fe levels. This was accompanied by a biodegradation of the nanotubes approaching 40%, whereas the Fe-free nanomaterial remained nearly untouched.
机译：高纵横比的纳米材料（HARNs）的毒性通常与氧化应激有关。必需营养素Fe也可能通过产生活性氧而导致氧化应激。在本研究中，已经研究了添加促进Fe的Fenton反应在多大程度上影响了铝锗酸盐模型HARN的毒性。仅将0.95％wt的铁结构添加到Ge-堇青石中，不仅减轻了无铁纳米管的毒性，而且还刺激了细菌的生长。这归因于铁载体固定的铁从纳米管结构的代谢。这通过监测稳态监测细胞内铁水平来证明。这伴随着纳米管的生物降解接近40％，而不含铁的纳米材料几乎没有被触及。

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  • 来源
    《Environmental Science & Technology》 |2016年第14期|7791-7798|共8页
  • 作者

    Astrid Avellan; Melanie Auffan; Armand Masion; Clement Levard; Marie Bertrand; Jerome Rose; Catherine Santaella; Wafa Achouak;

  • 作者单位

    Aix-Marseille Universite, CNRS, IRD, CEREGE UM34, 13545 Aix en Provence, France,iCEINT, International Consortium for the Environmental Implications of NanoTechology, CNRS, Duke University, Europole de l'Arbois, 13545 Aix-en-Provence, France,Laboratory of Microbial Ecology of the Rhizosphere and Extreme Environments (LEMIRE), Aix-Marseille Universite, CEA, CNRS, UMR 7265 Biosciences and Biotechnology Institute of Aix-Marseille (BIAM), ECCOREV FR 3098, CEA/Cadarache, 13108 St-Paul-lez-Durance, France;

    Aix-Marseille Universite, CNRS, IRD, CEREGE UM34, 13545 Aix en Provence, France,iCEINT, International Consortium for the Environmental Implications of NanoTechology, CNRS, Duke University, Europole de l'Arbois, 13545 Aix-en-Provence, France;

    Aix-Marseille Universite, CNRS, IRD, CEREGE UM34, 13545 Aix en Provence, France,iCEINT, International Consortium for the Environmental Implications of NanoTechology, CNRS, Duke University, Europole de l'Arbois, 13545 Aix-en-Provence, France;

    Aix-Marseille Universite, CNRS, IRD, CEREGE UM34, 13545 Aix en Provence, France,iCEINT, International Consortium for the Environmental Implications of NanoTechology, CNRS, Duke University, Europole de l'Arbois, 13545 Aix-en-Provence, France;

    Laboratory of Microbial Ecology of the Rhizosphere and Extreme Environments (LEMIRE), Aix-Marseille Universite, CEA, CNRS, UMR 7265 Biosciences and Biotechnology Institute of Aix-Marseille (BIAM), ECCOREV FR 3098, CEA/Cadarache, 13108 St-Paul-lez-Durance, France;

    Aix-Marseille Universite, CNRS, IRD, CEREGE UM34, 13545 Aix en Provence, France,iCEINT, International Consortium for the Environmental Implications of NanoTechology, CNRS, Duke University, Europole de l'Arbois, 13545 Aix-en-Provence, France;

    iCEINT, International Consortium for the Environmental Implications of NanoTechology, CNRS, Duke University, Europole de l'Arbois, 13545 Aix-en-Provence, France,Laboratory of Microbial Ecology of the Rhizosphere and Extreme Environments (LEMIRE), Aix-Marseille Universite, CEA, CNRS, UMR 7265 Biosciences and Biotechnology Institute of Aix-Marseille (BIAM), ECCOREV FR 3098, CEA/Cadarache, 13108 St-Paul-lez-Durance, France;

    iCEINT, International Consortium for the Environmental Implications of NanoTechology, CNRS, Duke University, Europole de l'Arbois, 13545 Aix-en-Provence, France,Laboratory of Microbial Ecology of the Rhizosphere and Extreme Environments (LEMIRE), Aix-Marseille Universite, CEA, CNRS, UMR 7265 Biosciences and Biotechnology Institute of Aix-Marseille (BIAM), ECCOREV FR 3098, CEA/Cadarache, 13108 St-Paul-lez-Durance, 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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