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Evaluation of the Osteoinductive Capacity of Polydopamine-Coated Poly(-caprolactone) Diacrylate Shape Memory Foams
J.D. Erndt-Marino, D.J. Munoz-Pinto, , A.C. Jimenez-Vergara, P. Diaz-Rodriguez, L. Woodard, D. Zhang, M.A. Grunlan, M.S. Hahn
Published in American Chemical Society
2015
Volume: 1
   
Issue: 12
Pages: 1220 - 1230
Abstract
Recently, a novel shape memory polymer foam based on the photopolymerization of poly(-caprolactone) diacrylate (PCLDA) has been developed. These PCLDA foams enter a temporary softened state when briefly treated with warm saline (Tsaline > Tm of PCLDA), allowing them to conform to irregular bone defect "boundaries" prior to shape setting. When coated with a mechanically stable polydopamine (PD) layer, these PCLDA foams have previously been demonstrated to induce hydroxyapatite deposition. In the present study, the osteoinductivity of these "self-fitting" PD-coated PCLDA (PD-PCLDA) materials was evaluated relative to uncoated PCLDA (U-PCLDA) controls using bone marrow-derived human mesenchymal stem cells (h-MSCs). When cultured in the absence of osteogenic media supplements, PD-PCLDA scaffolds expressed similar levels of Runx2, alkaline phosphatase, and osteopontin protein as U-PCLDA scaffolds cultured in the presence of osteogenic media supplements. In addition, PD-PCLDA scaffolds cultured without osteogenic supplements did not significantly promote undesired lineage progression (e.g., adipogenesis or chondrogenesis) of h-MSCs. Cumulatively, these data indicate that PD-PCLDA materials display increased osteoinductivity relative to U-PCLDA substrates. Future studies will examine tethered osteogenic factors or peptides toward augmenting the osteoinductive properties of the PD-PCLDA foams. © 2015 American Chemical Society.
About the journal
JournalData powered by TypesetACS Biomaterials Science and Engineering
PublisherData powered by TypesetAmerican Chemical Society
ISSN23739878