| Literature DB >> 29131587 |
Steve S Ho1, Andrew T Keown1, Bennett Addison1, J Kent Leach1,2.
Abstract
The adhesion and migration of cells entrapped in engineered materials is regulated by available adhesive ligands. Although mesenchymal stem cell (MSC) spheroids injected into damaged tissues promote repair, their transplantation in biomaterials which regulate cell migration from the aggregate may further enhance their therapeutic potential. Alginate hydrogels were modified with Arginine-Glycine-Aspartic acid (RGD) at increasing concentrations, and osteogenically induced human MSC spheroids were entrapped to assess cell migration, survival, and differentiation. Cell migration was greater from MSC spheroids in alginate modified with low RGD levels, while the osteogenic potential was higher for spheroids entrapped in unmodified or high RGD density gels in vitro. Upon ectopic implantation, microCT and immunohistochemistry revealed extensive osteogenesis in unmodified and high RGD density gels compared to low RGD density gels. These data suggest that restriction of MSC migration from spheroids correlates with enhanced spheroid osteogenic potential, representing a novel tool for bone tissue engineering.Entities:
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Year: 2017 PMID： 29131587 PMCID： PMC5971090 DOI： 10.1021/acs.biomac.7b01366
Source DB: PubMed Journal: Biomacromolecules ISSN： 1525-7797 Impact factor: 6.988