Journal
SMALL
Volume 14, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201702951
Keywords
adoptive T-Cells; glioma; magnetic resonance imaging; NaGdF4; TAT
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Funding
- National Natural Science Foundation of China Research [81671732, 51372260]
- China National Funds for Distinguished Young Scientists [51725202]
- Shanghai Excellent Academic Leaders Program [16XD1404000]
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Adoptive T lymphocyte immunotherapy is one of the most promising methods to treat residual lesions after glioma surgery. However, the fate of the adoptively transferred T-cells in vivo is unclear, hampering the understanding of this emerging therapy. Thus, it is highly desirable to develop noninvasive and quantitative in vivo tracking of these T-cells to glioma for better identification of the migratory fate and to provide objective evaluation of outcomes of adoptive T-cell immunotherapy targeting glioma. In this work, ultrasmall T-1 MR-based nanoprobes, NaGdF4-TAT, as molecular probes with high longitudinal relaxivity (8.93 mm(-1) s(-1)) are designed. By means of HIV-1 transactivator (TAT) peptides, nearly 95% of the adoptive T-cells are labeled with the NaGdF4-TAT nanoprobes without any measurable side effects on the labeled T-cells, which is remarkably superior to that of the control fluorescein isothiocyanate-NaGdF4 concerning labeling efficacy. Labeled adoptive T-cell clusters can be sensitively tracked in an orthotopic GL261-glioma model 24 h after intravenous infusion of 10(7) labeled T-cells by T-1-weighted MR imaging. Both in vitro and in vivo experiments show that the NaGdF4-TAT nanoprobes labeling of T-cells may be a promising method to track adoptive T-cells to improve our understanding of the pathophysiology in adoptive immunotherapy for gliomas.
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