期刊
MACROMOLECULAR BIOSCIENCE
卷 14, 期 8, 页码 1096-1105出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mabi.201400027
关键词
ARGET ATRP; biomaterials; drug delivery systems; nanoparticles; siRNA
资金
- National Science Foundation [CBET-1033746]
- Fletcher Stuckey Pratt Chair in Engineering
- National Science Foundation Graduate Research Fellowship Program [DGE-1110007]
This work investigates the interactions of a polycationic nanocarrier with siRNA and with cells in order to better understand the capabilities and limitations of the carrier. The polycationic nanocarriers are cross-linked copolymer nanoparticles synthesized in a single-step reaction using ARGET ATRP (activators regenerated by electron transfer atom transfer radical polymerization). The polycationic nanocarriers efficiently bind siRNA for polymer/siRNAmass ratios less than 1. A method to prepare fluorescently labeled polycationic nanocarriers is presented. The fluorescently labeled polycationic nanocarriers are used to investigate cellular internalization with RAW264.7 murine macrophage cells. Flow cytometry demonstrates that the uptake increased with nanoparticle concentration and incubation time. Confocal microscopy confirmed internalization of fluorescently labeled nanoparticles. The investigation of siRNA-induced knockdown demonstrates that higher concentrations of nanoparticles and siRNA are associated with increased knockdown. For the conditions tested in the knockdown experiments, the ARGET ATRP polycationic nanocarriers outperformed a commercially available Lipofectamine control.
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