title: Colonization and osteogenic differentiation of different stem cell sources on electrospun nanofiber meshes.
abstract: Numerous challenges remain in the successful clinical translation of cell-based therapies for musculoskeletal tissue repair, including the identification of an appropriate cell source and a viable cell delivery system. The aim of this study was to investigate the attachment, colonization, and osteogenic differentiation of two stem cell types, human mesenchymal stem cells (hMSCs) and human amniotic fluid stem (hAFS) cells, on electrospun nanofiber meshes. We demonstrate that nanofiber meshes are able to support these cell functions robustly, with both cell types demonstrating strong osteogenic potential. Differences in the kinetics of osteogenic differentiation were observed between hMSCs and hAFS cells, with the hAFS cells displaying a delayed alkaline phosphatase peak, but elevated mineral deposition, compared to hMSCs. We also compared the cell behavior on nanofiber meshes to that on tissue culture plastic, and observed that there is delayed initial attachment and proliferation on meshes, but enhanced mineralization at a later time point. Finally, cell-seeded nanofiber meshes were found to be effective in colonizing three-dimensional scaffolds in an in vitro system. This study provides support for the use of the nanofiber mesh as a model surface for cell culture in vitro, and a cell delivery vehicle for the repair of bone defects in vivo.
authors.affiliation: Wallace H. Coulter Department of Biomedical Engineering, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
authors.forename: Yash M
authors.initials: YM
authors.lastname: Kolambkar
authors.forename: Alexandra
authors.initials: A
authors.lastname: Peister
authors.forename: Andrew K
authors.initials: AK
authors.lastname: Ekaputra
authors.forename: Dietmar W
authors.initials: DW
authors.lastname: Hutmacher
authors.forename: Robert E
authors.initials: RE
authors.lastname: Guldberg
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000653:Amniotic Fluid / Q000166:cytology*; D002118:Calcium / Q000378:metabolism; D002454:Cell Differentiation / Q000502:physiology; D002470:Cell Survival / Q000502:physiology; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000378:metabolism; D057139:Nanofibers; D010012:Osteogenesis / Q000502:physiology; D017550:Spectroscopy, Fourier Transform Infrared; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism; D023822:Tissue Engineering / Q000379:methods
chemical_list: D000469:Alkaline Phosphatase; D002118:Calcium