Premium
Surface modification of silk fibroin with poly(ethylene glycol) for antiadhesion and antithrombotic applications
Author(s) -
Vepari Charu,
Matheson Douglas,
Drummy Larry,
Naik Rajesh,
Kaplan David L.
Publication year - 2010
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.32565
Subject(s) - fibroin , materials science , surface modification , ethylene glycol , antithrombotic , polyester , polymer science , composite material , silk , chemical engineering , engineering , medicine , cardiology
Silk fibroin film surfaces were PEGylated by reaction with cyanuric chloride‐activated poly(ethylene glycol) (PEG). Reactions with different concentrations of activated PEG generated films with PEG graft densities from 0.02 to 0.4 mg per square cm of silk fibroin. Increased PEGylation resulted in increased hydrophilicity as analyzed by contact angle, and a smoother morphology based on scanning electron microscopy. Increased PEGylation decreased human IgG adsorption and decreased the attachment and proliferation of human fibroblasts over two weeks. Increased concentration of PEG on the silk fibroin surfaces also decreased the proliferation of human mesenchymal stem cells and inhibited human platelet attachment. Surface PEGylated silk fibroin films could be useful antiadhesion and antithrombotic materials for biomedical applications when considered along with the unique mechanical and tailorable degradation profiles of silk fibroin. © 2009 Wiley Periodicals, Inc. J Biomed Mater Res, 2010