量子点纳米材料探针及其在肿瘤影像中的应用
2021-11-02孙溥临
孙溥临



摘 要:针对现有量子点影像探针存在荧光性质不可控、生物毒性强的问题,本研究结合现有的CuInS量子点探针,研究制备出一种掺杂Zn离子可简易合成的ZCIS/ZnS量子点纳米探针,并通过改进其水溶性,得到一种可直接应用于医学肿瘤影像的改进ZCIS/ZnS量子点纳米探针。为提高该量子点纳米探针的靶向性,研究根据EDC偶联的原理,通过将改进ZCIS/ZnS量子点纳米探针与cRGD多肽进行偶联,得到ZCIS/ZnS-cRGD量子点纳米探针,并从结构形态、细胞毒性和离体荧光3个方面重点评估了该量子点纳米探针,并通过实验论证了其有效性和实用性。实验结果证明,本研究制备的ZCIS/ZnS-cRGD量子点纳米探针是一种有效的肿瘤靶向探针,可用于实际肿瘤靶向检测。
关键词:CuInS;量子点;纳米材料;荧光成像
中图分类号:R329.2+6;Q26 文献标识码:A 文章编号:1001-5922(2021)10-0058-04
Quantum Dot Nanomaterial Probe and Its Application in Tumor Imaging
Sun Pulin
(School of Mechanical Engineering,Shandong University of Technology, Zibo 255000, China )
Abstract:In view of uncontrollable fluorescence properties and strong biological toxicity of existing quantum dot image probes,this study combines the existing CuInS quantum dot probes to prepare a ZCIS/ZnS doped with Zn ions that can be easily synthesized Quantum dot nanoprobe, and by improving its water solubility, an improved zcis/ZnS quantum dot nano probe can be directly applied to medical tumor imaging. In order to improve the targeting property of the QD nanoprobe, according to the principle of EDC coupling, the ZCIS/ZnS cRGD QD nanoprobe was obtained by coupling the modified ZCIS/ZnS QD nanoprobe with CGD peptide. The QD nanoprobe was evaluated from three aspects of structure morphology, cytotoxicity and fluorescence in vivo imaging, and its effectiveness and practicability were demonstrated by experiments. The experimental results show that the ZCIS/ZnS-cRGD quantum dot nanoprobe is an effective tumor targeting probe, which can be used for tumor targeted imaging in vivo.
Key words:CuInS; quantum dots; nanomaterials; fluorescence imaging
量子点作为一种新型纳米材料,由于其优良的光学性质,被广泛应用于生物标记。如刘蓓蓓、曹林(2019)建立了基于量子点的铅镉快速串联检测方法,用于检测肉中的Pb和Cd含量是否超标等[1]。但由于铅镉本身属于重金属,因此基于这两种元素的量子点具有潜在的生物毒性,故限制了它们在荧光活体成像方面的应用。近几年,随着量子点材料的发展,具有较低生物毒性的CuInS量子点材料在荧光活体成像方面得到快速发展,如冯彩萍、單路瑶等(2020)基于Fe3O4&CuInS2核壳结构构建了双模式成像系统,实现了可视化治疗[2]。但这些研究中量子点仍然存在荧光性质不可控的问题。为解决该问题,本研究结合现有的CuInS量子点探针与EDC偶联的原理,制备出一种荧光性质稳定,且生物毒性较低的ZCIS/ZnS-cRGD量子点纳米探针。……
