数字农科院2.0

The presence of oleate stabilized ZnO nanoparticles (NPs) and reduced the toxicity of aged NPs to Caco-2 and HepG2 cells

文献类型： 外文期刊

作者： Fang, Xin;Jiang, Leying;Gong, Yu;Li, Juan;Cao, Yi;Liu, Liangliang;Cao, Yi

作者机构：

关键词： Oleate (OA);ZnO nanoparticle (NP);Interaction;Caco-2?cells;HepG2 cells

期刊名称： CHEMICO-BIOLOGICAL INTERACTIONS

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年卷期：

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收录情况： SCI

摘要： Abstract The presence of food components may alter the colloidal aspects and toxicity of nanoparticles (NPs). In this study, the toxicity of ZnO NPs to Caco-2 and HepG2 cells was assessed, with the emphasis on the interactions between ZnO NPs and oleate (OA). The presence of OA increased UV–Vis spectra and hydrodynamic sizes, decreased Zeta potential, and markedly reduced the release of Zn ions from the dissolution of ZnO NPs, which combined indicated that OA could coat ZnO NPs and stabilize ZnO NPs. Exposure to ZnO NPs significantly induced cytotoxicity to Caco-2 and HepG2 cells, associated with increased intracellular Zn ions but not superoxide. When OA was added to the freshly prepared ZnO NP suspensions, the cytotoxicity, intracellular Zn ions and superoxide induced by ZnO NPs were not significantly affected. However, when ZnO NPs were aged for 24?h with the presence of OA, the cytotoxicity of ZnO NPs to Caco-2 and HepG2 cells was significantly reduced, associated with a reduction of intracellular Zn ions. The results from this study suggested that the presence of OA could increase colloidal stability of ZnO NPs and consequently reduce the toxicity of ZnO NPs after aging associated with reduced accumulation of intracellular Zn ions. Highlights ? The interactions between ZnO NPs and oleate (OA) were studied. ? OA could coat ZnO NPs and increase the colloidal stability. ? ZnO NP were toxic to Caco-2 and HepG2 cells associated with intracellular Zn ions. ? OA reduced the toxicity of aged but not freshly prepared ZnO NPs.

分类号： Q5

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