Interaction of multi-walled carbon nanotubes and zinc ions enhances cytotoxicity of zinc ions

Interaction of multi-walled carbon nanotubes and zinc ions enhances cytotoxicity of zinc ions
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多壁碳纳米管与锌离子的相互作用增强锌离子的细胞毒性

DOI:
10.1007/s11426-016-5591-2
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发表时间:
2016-04
期刊:
SCIENCE CHINA Chemistry
影响因子:
--
通讯作者:
Haifang Wang
Haifang Wang
中科院分区:
其他
文献类型:
--
作者:
Lin Wang;Jia-Hui Liu;Zheng-Mei Song;Yi-Xin Yang;Aoneng Cao;Yuanfang Liu;Haifang Wang

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越来越多的纳米材料随着其生产、应用和废弃而进入环境。它们可能通过不同的相互作用改变真实环境中已经存在的污染物的生物效应。因此还应努力研究纳米材料和污染物的联合毒性。在此,我们研究了氧化多壁碳纳米管(O-MWCNT)和锌离子对细胞的联合毒性。研究发现,与单独的O-MWCNTs或锌离子相比,O-MWCNTs和锌离子组合的细胞毒性显着升高。该结果来自细胞形态、细胞活力和增殖、细胞膜完整性、线粒体膜电位和细胞凋亡的测定。机理研究表明O-MWCNTs吸收锌离子并形成轻微的聚集。这些显着增强了O-MWCNT的细胞摄取,从而通过将更多的锌离子带入细胞来诱导细胞死亡。我们的研究表明纳米材料的存在可以改变其他污染物的生物后果,并强调了纳米材料存在下联合毒性研究的重要性。
More and more nanomaterials enter the environment along with their production, application and deposal. They may alter the.biological effect of pollutants already existing in the real environment by different interactions. Therefore efforts should also.be paid to investigate the combined toxicity of nanomaterials and pollutants. Herein, we studied the combined toxicity of oxidized.multi-walled carbon nanotubes (O-MWCNTs) and zinc ions on cells. It is found that cytotoxicity of the combined.O-MWCNTs and zinc ions elevates significantly, compared with O-MWCNTs or zinc ions alone. This result comes from the.assays of cell morphology, cell viability and proliferation, cell membrane integrity, mitochondrial membrane potential and cell.apoptosis. Mechanism studies indicate that O-MWCNTs absorb zinc ions and form slight aggregation. These enhance remarkably.the cellular uptake of O-MWCNTs, and thus induce the death of cells by bringing in more zinc ions into cells. Our study.indicates that the existence of nanomaterials could change the bioconsequence of other pollutants and emphasizes the importance.of the combined toxicity research in the presence of nanomaterials.
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