期刊
ACS NANO
卷 10, 期 10, 页码 9216-9226出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b07973
关键词
nanocapsules; T cells; interleukin-2; click chemistry; hydroxyethyl starch; immunotherapy; human; murine
类别
资金
- German Research Foundation (DFG) by the German Cancer Aid [STE791/6-1, STE791/9-1, CRC 1066/B6, TR156/A4/C5, 110631]
- Max Planck Graduate Center fellowships
- IMB's (Johannes Gutenberg-University Main
- Germany) Flow Cytometry Core Facility
A major demand on immunotherapy is the direct interference with specific immune cells in vivo. In contrast to antibody engineered nanoparticles to control dendritic cells function, targeting of T cells for biomedical applications still remains an obstacle as they disclose reduced endocytic activities. Here, by coupling the cytokine interleukin-2 (IL-2) to the surface of hydroxyethyl starch nanocapsules, we demonstrated a direct and specifc T cell targeting in vitro and in vivo by IL-2 receptor-mediated internalization. For this purpose, defined amounts of azide-functionalized IL-2 were linked to alkyne-functionalized hydroxyethyl starch nanocapsules via copper-free click reactions. In combination with validated quantification of the surface-linked IL-2 with anthracen azide, this method allowed for engineering IL-2-functionalized nanocapsules for an efficient targeting of human and murine T cell populations with various IL-2 receptor affinities. This nanocapsulemediated technique is a promising strategy for T cell-based immunotherapies and may be translated to other cytokinerelated targeting systems.
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