Size-dependent cytotoxicity of nanocarbon blacks.

Size-dependent cytotoxicity of nanocarbon blacks.
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纳米炭黑的尺寸依赖性细胞毒性

DOI:
10.3390/ijms141122529
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发表时间:
2013-11-14
影响因子:
5.6
通讯作者:
Zhu Y
Zhu Y
中科院分区:
生物学2区
文献类型:
--
作者:
Kong H;Zhang Y;Li Y;Cui Z;Xia K;Sun Y;Zhao Q;Zhu Y

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在这项研究中,我们研究了不同尺寸的纳米炭黑(NCB)对小鼠巨噬细胞RAW264.7细胞的毒性作用。MTT和荧光LIVE实验表明,NCB的摄取对细胞产生了大小和剂量依赖性的生长抑制。采用光学显微镜观察和99mTc放射性核素标记技术分别对不同大小的NCB的细胞摄取进行定性和定量研究。结果表明,细胞对NCB的摄取量随其体积的增大而增加。大量的NCB可诱导细胞内的氧化应激和核损伤,这些作用可能是NCB细胞毒性的关键因素。与这些研究结果的影响进行了讨论。
In this study, we investigated the toxic effects of nanocarbon blacks (NCBs) with different sizes to mouse macrophage RAW264.7 cells. MTT and fluorescence-based LIVE assays demonstrated that NCBs uptake caused a size and dose-dependent growth inhibition to the cells. Optical microscopy observations and 99mTc radionuclide labeling techniques were used to investigate the cellular uptake of NCBs with different sizes qualitatively and quantitatively, respectively. Results showed that the cellular uptake amounts of NCBs increased with their increasing size. Large quantities of internal NCBs induced oxidative stress and nuclear damage in cells; these effects may be the critical factors involved in the cytotoxicity of NCBs. The implications associated with these findings are discussed.
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