期刊
ADVANCED FUNCTIONAL MATERIALS
卷 23, 期 3, 页码 272-280出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201201733
关键词
multifunctional nanoparticles; mesenchymal stem cells; cell tracking; magnetic targeting; tissue repair
类别
资金
- National Basic Research Programs of China (973 Program) [2012CB932601, 2011CB911002]
- National Natural Science Foundation of China [51132006, 51002100]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Innovation Program of Graduate Students in Jiangsu Province [CX10B_036Z]
Stem cells have generated a great deal of excitement in cell-based therapies. Here, a unique class of multifunctional nanoparticles (MFNPs) with both upconversion luminescence (UCL) and superparamagnetic properties is used for stem cell research. It is discovered that after being labeled with MFNPs, mouse mesenchymal stem cells (mMSCs) are able to maintain their viability and differentiation ability. In vivo UCL imaging of MFNP-labeled mMSCs transplanted into animals is carried out, achieving ultrahigh tracking sensitivity with a detection limit as low as 10 cells in a mouse. Using both UCL optical and magnetic resonance (MR) imaging approaches, MFNP-labeled mMSCs are tracked after being intraperitoneally injected into wound-bearing mice under a magnetic field. The translocation of mMSCs from the injection site to the wound nearby the magnet is observed and, intriguingly, a remarkably improved tissue repair effect is observed as the result of magnetically induced accumulation of stem cells in the wound site. The results demonstrate the use MFNPs as novel multifunctional probes for labeling, in vivo tracking, and manipulation of stem cells, which is promising for imaging guided cell therapies and tissue engineering.
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