Interpenetrating network design of bioactive hydrogel coatings with enhanced damage resistance

Megan Wancura, Abbey Nkansah, Malgorzata Chwatko, Andrew Robinson, Ashauntee Fairley, Eizabeth Cosgriff-Hernandez

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Bioactive hydrogel coatings offer a promising route to introduce sustained thromboresistance to cardiovascular devices without compromising bulk mechanical properties. Poly(ethylene glycol)-based hydrogels provide antifouling properties to limit acute thromobosis and incorporation of adhesive ligands can be used to promote endothelialization. However, conventional PEG-based hydrogels at stiffnesses that promote cell attachment can be brittle and prone to damage in a surgical setting, limiting their utility in clinical applications. In this work, we developed a durable hydrogel coating using interpenetrating networks of polyether urethane diacrylamide (PEUDAm) and poly(N-acryloyl glycinamide) (pNAGA). First, diffusion-mediated redox initiation of PEUDAm was used to coat electrospun polyurethane fiber meshes with coating thickness controlled by the immersion time. The second network of pNAGA was then introduced to enhance damage resistance of the hydrogel coating. The durability, thromboresistance, and bioactivity of the resulting multilayer grafts were then assessed. The IPN hydrogel coatings displayed resistance to surgically-associated damage mechanisms and retained the anti-fouling nature of PEG-based hydrogels as indicated by reduced protein adsorption and platelet attachment. Moreover, incorporation of functionalized collagen into the IPN hydrogel coating conferred bioactivity that supported endothelial cell adhesion. Overall, this conformable and durable hydrogel coating provides an improved approach for cardiovascular device fabrication with targeted biological activity.

Original languageEnglish
Pages (from-to)5416-5428
Number of pages13
JournalJournal of Materials Chemistry B
Issue number24
StatePublished - Feb 20 2023

Bibliographical note

Funding Information:
The work presented here was supported by the National Institutes of Health R01 HL162741. The Bionate® Thermoplastic Polycarbonate-urethane was provided by DSM Biomedical (Berkeley, CA).We would like to acknowledge the support of Dr Michael Sack's for use of his pulsatile flow loop system.

Publisher Copyright:
© 2023 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Chemistry (all)
  • Biomedical Engineering
  • Materials Science (all)


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