Characterization of Tunable FGF-2 Releasing Polyelectrolyte Multilayers
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Author(s)
Macdonald, Mara L.
Rodriguez, Natalia M.
Shah, Nisarg J.
Hammond, Paula T.
Date Issued
July 2010
Journal
Biomacromolecules
Publisher
American Chemical Society
Citation
Macdonald, Mara L., Natalia M. Rodriguez, Nisarg J. Shah, and Paula T. Hammond. Characterization of Tunable FGF-2 Releasing Polyelectrolyte Multilayers. Biomacromolecules 11, no. 8 (August 9, 2010): 2053-2059.
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Author's final manuscript
Abstract
Fibroblast growth factor 2 (FGF-2) is a potent mediator of stem cell differentiation and proliferation. Although FGF-2 has a well-established role in promoting bone tissue formation, flaws in its delivery have limited its clinical utility. Polyelectrolyte multilayer films represent a novel system for FGF-2 delivery that has promise for local, precisely controlled, and sustained release of FGF-2 from surfaces of interest, including medical implants and tissue engineering scaffolds. In this work, the loading and release of FGF-2 from synthetic hydrolytically degradable multilayer thin films of various architectures is explored; drug loading was tunable using at least three parameters (number of nanolayers, counterpolyanion, and type of degradable polycation) and yielded values of 7−45 ng/cm2 of FGF-2. Release time varied between 24 h and approximately five days. FGF-2 released from these films retained in vitro activity, promoting the proliferation of MC3T3 preosteoblast cells. The use of biologically derived counterpolyanions heparin sulfate and chondroitin sulfate in the multilayer structures enhanced FGF-2 activity. The control over drug loading and release kinetics inform future in vivo bone and tissue regeneration models for the exploration of clinical relevance of LbL growth factor delivery films.
MIT Department
Harvard University--MIT Division of Health Sciences and Technology
Massachusetts Institute of Technology. Department of Chemical Engineering
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DOI of Published Version
https://doi.org/10.1021/bm100413w
