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题名: Assessment of the Toxicity of CuO Nanoparticles by Using Saccharomyces cerevisiae Mutants with Multiple Genes Deleted
作者: Bao ShaoPan1, 2; Lu, Qicong1, 2; Fang, Tao1; Dai, Heping1; Zhang, Chao1, 2
刊名: APPLIED AND ENVIRONMENTAL MICROBIOLOGY
发表日期: 2015-12-01
DOI: 10.1128/AEM.02035-15
卷: 81, 期:23, 页:8098-8107
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biotechnology & Applied Microbiology ; Microbiology
研究领域[WOS]: Biotechnology & Applied Microbiology ; Microbiology
英文摘要: To develop applicable and susceptible models to evaluate the toxicity of nanoparticles, the antimicrobial effects of CuO nanoparticles (CuO-NPs) on various Saccharomyces cerevisiae (S. cerevisiae) strains (wild type, single-gene-deleted mutants, and multiple-gene-deleted mutants) were determined and compared. Further experiments were also conducted to analyze the mechanisms associated with toxicity using copper salt, bulk CuO (bCuO), carbon-shelled copper nanoparticles (C/Cu-NPs), and carbon nanoparticles (C-NPs) for comparisons. The results indicated that the growth inhibition rates of CuO-NPs for the wild-type and the single-gene-deleted strains were comparable, while for the multiple-gene deletion mutant, significantly higher toxicity was observed (P < 0.05). When the toxicity of the CuO-NPs to yeast cells was compared with the toxicities of copper salt and bCuO, we concluded that the toxicity of CuO-NPs should be attributed to soluble copper rather than to the nanoparticles. The striking difference in adverse effects of C-NPs and C/Cu-NPs with equivalent surface areas also proved this. A toxicity assay revealed that the multiple-gene-deleted mutant was significantly more sensitive to CuO-NPs than the wild type. Specifically, compared with the wild-type strain, copper was readily taken up by mutant strains when cell permeability genes were knocked out, and the mutants with deletions of genes regulated under oxidative stress (OS) were likely producing more reactive oxygen species (ROS). Hence, as mechanism-based gene inactivation could increase the susceptibility of yeast, the multiple-gene-deleted mutants should be improved model organisms to investigate the toxicity of nanoparticles.
关键词[WOS]: METAL-OXIDE NANOPARTICLES ; DISSOLVED ORGANIC-MATTER ; CELLS IN-VITRO ; OXIDATIVE STRESS ; CARBON NANOTUBES ; GENOTOXIC AGENTS ; PLASMA-MEMBRANE ; TESTING SYSTEM ; CWP GENES ; YEAST
语种: 英语
项目资助者: Natural Science Foundation of China(21477159 ; 21037004)
WOS记录号: WOS:000364775700014
ISSN号: 0099-2240
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27359
Appears in Collections:水生生物分子与细胞生物学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
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