期刊
ADVANCED FUNCTIONAL MATERIALS
卷 22, 期 13, 页码 2713-2722出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201200082
关键词
electrospinning; up-conversion; porous SiO2 fibers; drug delivery; cell imaging
类别
资金
- National Basic Research Program of China [2010CB327704]
- National High Technology Program of China [2011AA03A407]
- National Natural Science Foundation of China (NSFC) [20901074, 51172228, 21101149, 51172227, 20921002]
- Postdoctoral Science Foundation of China [20100481070, 201104497]
- Science and Technology Development Program of Jilin Province for Youths [20100106]
Up-conversion (UC) luminescent and porous NaYF4:Yb3+, Er3+@SiO2 nanocomposite fibers are prepared by electrospinning process. The biocompatibility test on L929 fibrolast cells reveals low cytotoxicity of the fibers. The obtained fibers can be used as anti-cancer drug delivery host carriers for investigation of the drug storage/release properties. Doxorubicin hydrochloride (DOX), a typical anticancer drug, is introduced into NaYF4:Yb3+, Er3+@SiO2 nanocomposite fibers (denoted as DOX-NaYF4:Yb3+, Er3+@SiO2). The release properties of the drug carrier system are examined and the in vitro cytotoxicity and cell uptake behavior of these NaYF4:Yb3+, Er3+@SiO2 for HeLa cells are evaluated. The release of DOX from NaYF4:Yb3+, Er3+@SiO2 exhibits sustained, pH-sensitive release patterns and the DOX-NaYF4:Yb3+, Er3+@SiO2 show similar cytotoxicity as the free DOX on HeLa cells. Confocal microscopy observations show that the composites can be effectively taken up by HeLa cells. Furthermore, the fibers show near-infrared UC luminescence and are successfully applied in bioimaging of HeLa cells. The results indicate the promise of using NaYF4:Yb3+, Er3+@SiO2 nanocomposite fibers as multi-functional drug carriers for drug delivery and cell imaging.
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