Carbohydrate Polymers
Carbohydrate Polymers
3 years ago

Light-activatable prodrugs based on hyaluronic acid biomaterials

Light-activatable prodrugs based on hyaluronic acid biomaterials
Photosensitive in situ cross-linked hyaluronan (HA) hydrogels are prepared by modular chemoselective assembly from the biopolymer precursors and novel heterobifunctional linkers with middle photo-labile ortho-nitrobenzyl group and orthogonally reactive terminals. Starting from the thiol-modified HA and a linker with activated disulfide and hydrazide terminals, a photo-degradable HA hydrogel was prepared by the hydrazone cross-linking reaction. Moreover, a light-triggered drug-releasing hydrogel prodrug was constructed by an orthogonal conjugation of dopamine (DA) via a photo-labile linker to HA dually modified with thiol and hydrazide groups (hy-HA-SH) and a subsequent cross-linking with aldehyde-derivatized HA (HA-al). On-demand release of DA from the hydrogel was achieved upon exposure of the hydrogel to UV light whereas 11-fold less release of the drug was observed in the absence of light. The mechanical properties of the hydrogels, photodegradation kinetics, photorelease of the model drugs were studied by rheology, spectrophotometry, chromatography, and mass spectrometry. For the first time, integration of photolabile components into an actual polysaccharide of extracellular matrix was implemented for the light-controlled release of drug molecules.

Publisher URL: www.sciencedirect.com/science

DOI: S0144861717311748

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.