Cytotoxicity of InP/ZnS Quantum Dots With Different Surface Functional Groups Toward Two Lung-Derived Cell Lines.

Cytotoxicity of InP/ZnS Quantum Dots With Different Surface Functional Groups Toward Two Lung-Derived Cell Lines.
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具有不同表面官能团的 InP/ZnS 量子点对两种肺源性细胞系的细胞毒性

DOI:
10.3389/fphar.2018.00763
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发表时间:
2018
影响因子:
5.6
通讯作者:
Lin G
Lin G
中科院分区:
医学2区
文献类型:
--
作者:
Chen T;Li L;Xu G;Wang X;Wang J;Chen Y;Jiang W;Yang Z;Lin G

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尽管INP/ZNS量子点(QD)已成为基于镉的QD的危险替代品,但尚未完全了解其毒性。在这项工作中,我们将具有不同表面组(NH2,COOH,OH)的INP/ZnS QD的细胞毒性介绍给两个肺衍生的细胞系。表征了INP/ZnS QD的直径和光谱,并比较了水溶液中QD的流体动力学大小。将共聚焦激光扫描显微镜用于可视化人类肺癌细胞HCC-15和肺泡II型上皮细胞RLE-6TN的QD标记。流式细胞仪分别用于定性确认QD的摄取效率,细胞凋亡和ROS产生。结果表明,在去离子水中,INP/ZNS-OH QD易于汇总,并且水动力大小远大于其他INP/ZNS QD。所有这些INP/ZNS QD都能够进入细胞,在低浓度下,INP/ZNS-COOH和INP/ZNS-NH2的吸收效率更高。高剂量的INP/ZNS QD导致细胞活力降低,INP/ZNS-COOH QD和INP/ZNS-NH2 QD似乎比INP/Zns-OH QD更具毒性。此外,所有这些INP/ZNS QD都促进了与细胞共培养后的细胞凋亡和细胞内ROS的产生。这些结果表明,将来将INP/ZNS QD用于生物成像和治疗目的时,应优化适当的浓度和表面官能团。
Although InP/ZnS quantum dots (QDs) have emerged as a presumably less hazardous alternative to cadmium-based QDs, their toxicity has not been fully understood. In this work, we report the cytotoxicity of InP/ZnS QDs with different surface groups (NH2, COOH, OH) toward two lung-derived cell lines. The diameter and the spectra of InP/ZnS QDs were characterized and the hydrodynamic size of QDs in aqueous solution was compared. The confocal laser scanning microscopy was applied to visualize the labeling of QDs for human lung cancer cell HCC-15 and Alveolar type II epithelial cell RLE-6TN. The flow cytometry was used to confirm qualitatively the uptake efficiency of QDs, the cell apoptosis and ROS generation, respectively. The results showed that in deionized water, InP/ZnS-OH QDs were easier to aggregate, and the hydrodynamic size was much greater than the other InP/ZnS QDs. All these InP/ZnS QDs were able to enter the cells, with higher uptake efficiency for InP/ZnS-COOH and InP/ZnS-NH2 at low concentration. High doses of InP/ZnS QDs caused the cell viability to decrease, and InP/ZnS-COOH QDs and InP/ZnS-NH2 QDs appeared to be more toxic than InP/ZnS-OH QDs. In addition, all these InP/ZnS QDs promoted cell apoptosis and intracellular ROS generation after co-cultured with cells. These results suggested that appropriate concentration and surface functional groups should be optimized when InP/ZnS QDs are utilized for biological imaging and therapeutic purpose in the future.
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