Functional disulfide-stabilized polymer-protein particles

Zhongfan Jia, Jingquan Liu, Cyrille Boyer, Thomas P. Davis, Volga Bulmus

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Polymer - protein hybrid particles (PPHPs) have a significant potential in drug delivery, diagnosis, and biomedical imaging applications. Herein, we describe a simple route to disulfide cross-linked, poly(ethylene glycol)-streptavidin hybrid particles with tunable diameters. These particles have great versatility and potential for a number of reasons. First, they possess free biotin binding sites on their streptavidin (SAv) coated surface, enabling the conjugation of any biotinylated-molecule such as biotinylated antibodies. Second, core-stabilization can easily be controlled using reversible disulfide cross-links, and third, thiol- and ene-reactive functionalities in the core are available for the conjugation of drugs and labels. In detail, micelles having a biotinylated poly(ethylene glycol) corona and a disulfide cross-linked, reactive core were formed using α-biotin PEG-b-poly(pyridyldisulfide ethylmethacrylate) block copolymers synthesized via RAFT polymerization. Functionalization of the micelle core was performed in a one-pot reaction concurrent with the micellization and cross-linking processes by using a thiol-reactive model compound (a maleimide derivative of a green fluorophore). The resultant micelles displayed spherical morphology with a diameter of 54 ± 4 nm. Biotin functionality was largely exposed on the micelle corona (75 mol % availability), as determined by a streptavidin/HABA assay. The micelles were subsequently decorated with (red fluorophore-labeled) streptavidin (SAv) through the accessible biotins on the surface, yielding SAv-linked micelle aggregates with tunable dimensions (in the range between 350 nm and 2 μ m), as determined by transmission electron microscopy. Fluorescent-labels on the particles were monitored using confocal microscopy, revealing that the SAv coats the periphery of the PPHPs.

Original languageEnglish
Pages (from-to)3253-3258
Number of pages6
JournalBiomacromolecules
Volume10
Issue number12
DOIs
Publication statusPublished - 14 Dec 2009
Externally publishedYes

Fingerprint Dive into the research topics of 'Functional disulfide-stabilized polymer-protein particles'. Together they form a unique fingerprint.

  • Cite this

    Jia, Z., Liu, J., Boyer, C., Davis, T. P., & Bulmus, V. (2009). Functional disulfide-stabilized polymer-protein particles. Biomacromolecules, 10(12), 3253-3258. https://doi.org/10.1021/bm900817a