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首页> 外文期刊>Environmental Pollution >Toxicity Biomarker Expression In Daphnids Exposed To Manufactured Nanoparticles: Changes In Toxicity With Functionalization
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Toxicity Biomarker Expression In Daphnids Exposed To Manufactured Nanoparticles: Changes In Toxicity With Functionalization

机译:暴露于人造纳米颗粒的水蚤中毒性生物标志物的表达:毒性与功能化的变化。

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In previous work we have shown that the toxicity of nanomaterials to Daphnia spp. differs with the type of nanopartide either due to the core of the particle or to the way in which a particle suspension is prepared. The purpose of this study was to investigate the toxicity and antioxidant response of Daphnia pulex in relation to a change in surface functionalization of nanomaterials with the same core material, nC60. Despite the lack of acute toxicity for various nC60 suspensions up to 100 ppm concentration, there was a significant production of the toxicity biomarkers glutathi6ne-S-transferase and catalase, at lower concentrations indicating changes in reactive oxygen species. Nanopartide functionalization significantly affected this response. Oxidative stress markers appear to be a good predictor of potential future toxicity of nanomaterials. Functionalization alters both toxicity and oxidative stress in whole organism assays.
机译:在以前的工作中,我们已经证明了纳米材料对水蚤的毒性。由于颗粒的核心或制备颗粒悬浮液的方式,纳米颗粒的类型有所不同。这项研究的目的是调查水蚤的毒性和抗氧化反应与具有相同核心材料nC60的纳米材料的表面功能化变化有关。尽管对于浓度高达100 ppm的各种nC60悬浮液均没有急性毒性,但在较低浓度下仍显着产生了毒性生物标志物谷胱甘肽S-转移酶和过氧化氢酶,表明反应性氧种类发生了变化。纳米粒子的功能化大大影响了这一反应。氧化应激标志物似乎是纳米材料未来潜在毒性的良好预测指标。在整个生物测定中,功能化会改变毒性和氧化应激。

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