期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 24, 期 10, 页码 2328-2333出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201704580
关键词
hydrogels; microfluidics; protein delivery; ruthenium; stimulus-responsive
资金
- NIH [R01 GM083030]
- National Science Foundation MRSEC grant [DMR-1120901]
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM083030] Funding Source: NIH RePORTER
Incorporation of photoresponsive molecules within soft materials can provide spatiotemporal control over bulk properties and address challenges in targeted delivery and mechanical variability. However, the kinetics of in situ photochemical reactions are often slow and typically employ ultraviolet wavelengths. Here, we present a novel photoactive crosslinker Ru(bipyridine)(2)(3-pyridinaldehyde)(2) (RuAldehyde), which was reacted with hydrazide-functionalized hyaluronic acid to form hydrogels capable of encapsulating protein cargo. Visible light irradiation (400-500 nm) initiated rapid ligand exchange on the ruthenium center, which degraded the hydrogel within seconds to minutes, depending on gel thickness. An exemplar enzyme cargo, TEM1 beta-lactamase, was loaded into and photoreleased from the Ru-hydrogel. To expand their applications, Ru-hydrogels were also processed into microgels using a microfluidic platform.
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