期刊
BIOMACROMOLECULES
卷 10, 期 8, 页码 2300-2309出版社
AMER CHEMICAL SOC
DOI: 10.1021/bm9004904
关键词
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资金
- Center for Biologic Imaging, University of Pittsburgh School of Medicine
- Molecular Biosensor and Imaging Center, Carnegie Mellon University
- CRP Consortium at Carnegie Mellon University
- National Science Foundation [DMR-0549353]
- National Tissue Engineering Center [DAMA 17-02-0717]
- National Institutes of Health [NIH ROI DE15392]
Atom transfer radical polymerization (ATRP) was used to produce a versatile drug delivery system capable of encapsulating a range of molecules. Inverse miniemulsion ATRP permitted the synthesis of biocompatible and uniformly cross-linked poly(ethylene oxide)-based nanogels entrapping gold nanoparticles, bovine serum albumin, rhodamine B isothiocyanate-dextran, or fluoresceine isothiocyanate-dextran. These moieties were entrapped to validate several biological outcomes and to model delivery of range of molecules. Cellular uptake of nanogels was verified by transmission electron microscopy, gel electrophoresis, Western blotting, confocal microscopy, and flow cytometry. Fluorescent colocalization of nanogels with a fluorophore-conjugated antibody for clathrin indicated clathrin-mediated endocytosis. Forthermore, internalization of nanogels either with or without GRGDS cell attachment-mediating peptides was quantified using flow cytometry. After 45 min of incubation, the uptake of unmodified FITC-Dx-loaded nanogels was 62%, whereas cellular uptake increased to >95% with the same concentration of GRGDS-modified FITC-Dx nanogels. fit addition, a spheroidal coculture of human umbilical vascular endothelial cells (HUVECs) and human mesenchymal stein cells (hMSCs) validated cell endocytosis. Application of ATRP enabled the synthesis of a functionalized drug delivery system with a uniform network that is capable of encapsulating and delivering inorganic, organic, and biological molecules.
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