期刊
SOFT MATTER
卷 4, 期 4, 页码 821-827出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b714750c
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- Engineering and Physical Sciences Research Council [EP/D07410X/1] Funding Source: researchfish
- EPSRC [EP/D07410X/1] Funding Source: UKRI
We report on enzyme-responsive hydrogel particles for the controlled release of proteins. Amino-functionalised poly(ethylene glycol acrylamide) (PEGA) hydrogel particles were functionalised with peptide actuators that cause charge-induced swelling and payload release when triggered enzymatically. Peptide-based actuators were designed to match the specificity of the target enzyme, while also matching the charge properties of the to-be released protein payload, thereby uniquely allowing for tuneable release profiles. Fluorescently labelled albumin and avidin, proteins of similar size but opposite charge, were released at a rate that was governed by the peptide actuator linked to the polymer carrier, offering a highly controlled release mechanism. Release profiles were analysed using a combination of fluorescence spectroscopy of the solution and two-photon fluorescence microscopy to analyse enzymatically triggered molecular events within hydrogel particles during the initial stages of release.
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