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Nanofiber Orientation and Surface Functionalization Modulate Human Mesenchymal Stem Cell Behavior In Vitro.
MedLine Citation:
PMID:  24020454     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Electrospun nanofiber meshes have emerged as a new generation of scaffold membranes possessing a number of features suitable for tissue regeneration. One of these features is the flexibility to modify their structure and composition in order to orchestrate specific cellular responses. In this study, we investigated the effects of nanofiber orientation and surface functionalization on human mesenchymal stem cell (hMSC) migration and osteogenic differentiation. We used an in vitro model to examine hMSC migration into a cell-free zone on nanofiber meshes and mitomycin C treatment to assess the contribution of proliferation to the observed migration. Poly (ε-caprolactone) meshes with oriented topography were created by electrospinning aligned nanofibers on a rotating mandrel, while randomly-oriented controls were collected on a stationary collector. Both aligned and random meshes were coated with a triple-helical, type I collagen-mimetic peptide, containing the glycine-phenylalanine-hydroxyproline-glycine-glutamate-arginine (GFOGER) motif. Our results indicate nanofiber GFOGER peptide-functionalization and orientation modulate cellular behavior, individually, and in combination. GFOGER significantly enhanced the migration, proliferation and osteogenic differentiation of hMSCs on nanofiber meshes. Aligned nanofiber meshes displayed increased cell migration along the direction of fiber orientation compared to random meshes; however, fiber alignment did not influence osteogenic differentiation. Compared to each other, GFOGER coating resulted in a higher proliferation-driven cell migration, whereas fiber orientation appeared to generate a larger direct migratory effect. This study demonstrates that peptide surface modification and topographical cues associated with fiber alignment can be used to direct cellular behavior on nanofiber mesh scaffolds, which may be exploited for tissue regeneration.
Authors:
Yash Manohar Kolambkar; Mehmet Bajin; Abigail Marie Wojtowicz; Dietmar Werner Hutmacher; Andres J Garcia; Robert Guldberg
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-9-10
Journal Detail:
Title:  Tissue engineering. Part A     Volume:  -     ISSN:  1937-335X     ISO Abbreviation:  Tissue Eng Part A     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-9-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101466659     Medline TA:  Tissue Eng Part A     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Georgia Institute of Technology, Biomedical Engineering, 315 Ferst Drive, Atlanta, Georgia, United States, 30332-0363, 404-385-6778 ; yashk@gatech.edu.
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