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首页> 外文期刊>Journal of Materials Research >Antibacterial activity of nanoporous gold against Escherichia coli and Staphylococcus epidermidis
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Antibacterial activity of nanoporous gold against Escherichia coli and Staphylococcus epidermidis

机译：纳米多孔金对大肠杆菌和表皮葡萄球菌的抗菌活性

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摘要

Conventional metallic antibacterial materials release metal ions and reactive oxygen species (ROS) for killing bacteria. Herein, we found that nanoporous gold (NPG) exhibits antibacterial activity (AA) at an intermediate relative humidity (RH) of 60% against Escherichia coli and Staphylococcus epidermidis in contrast to the inert behavior of bulk gold. The dependence of AA on RH, morphological observations of bacteria on NPG, and transcriptomic analyses of NPG-treated Escherichia coli were investigated. These observations collectively suggest that biological processes in cell walls containing peptidoglycan and cell membranes are significantly disrupted by direct contact with NPG. Metal ions and ROS were not detected, and therefore are not responsible for the present antibacterial properties of NPG. The catalytic nature of NPG may be responsible for its AA, probably because of lattice distortion at the surface of nanosized ligaments with large curvature.
机译：常规的金属抗菌材料会释放金属离子和活性氧（ROS），以杀死细菌。在本文中，我们发现纳米多孔金（NPG）在中等相对湿度（RH）为60％时，对大肠杆菌和表皮葡萄球菌具有抗菌活性（AA），而散装金的惰性则相反。研究了AA对RH的依赖性，细菌在NPG上的形态学观察以及NPG处理的大肠杆菌的转录组分析。这些发现共同表明，含有肽聚糖和细胞膜的细胞壁中的生物过程被与NPG的直接接触所破坏。未检测到金属离子和ROS，因此对NPG目前的抗菌性能不负责任。 NPG的催化性质可能是其AA的原因，这可能是由于具有大曲率的纳米级韧带表面的晶格畸变。

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  • 来源
    《Journal of Materials Research》 |2017年第9期|1787-1795|共9页
  • 作者

    Masataka Hakamada; Seiji Taniguchi; Mamoru Mabuchi;

  • 作者单位

    Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Kyoto 606-8501, Japan;

    Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Kyoto 606-8501, Japan;

    Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Kyoto 606-8501, Japan;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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