Engineering the hard–soft tissue interface with random-to-aligned nanofiber scaffolds

Tendon injuries can be difficult to heal and have high rates of relapse due to stress concentrations caused by scar formation and the sutures used in surgical repair. Regeneration of the tendon/ligament-to-bone interface is critical to provide functional graft integration after injury. The objective...

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Bibliographic Details
Published in:	Nanobiomedicine Vol. 5; p. 1849543518803538
Main Authors:	Nowlin, John, Bismi, Mehzubh A, Delpech, Baptiste, Dumas, Patrick, Zhou, Yingge, Tan, George Z
Format:	Journal Article
Language:	English
Published:	London, England SAGE Publications 01-01-2018 Sage Publications Ltd
Subjects:	Original Tissue engineering Electrospinning heterogeneous nanofiber scaffold tissue engineering tendon enthesis
Online Access:	Get full text
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Summary:	Tendon injuries can be difficult to heal and have high rates of relapse due to stress concentrations caused by scar formation and the sutures used in surgical repair. Regeneration of the tendon/ligament-to-bone interface is critical to provide functional graft integration after injury. The objective of this study is to recreate the tendon-to-bone interface using a gradient scaffold which is fabricated by a one-station electrospinning process. Two cell phenotypes were grown on a poly-ε-caprolactone nanofiber scaffold which possesses a gradual transition from random to aligned nanofiber patterns. We assessed the effects of the polymer concentration, tip-to-collector distance, and electrospinning time on the microfiber diameter and density. Osteosarcoma and fibroblast cells were seeded on the random and aligned sections of scaffolds, respectively. A random-to-aligned cocultured tissue interface which mimicked the native transition in composition of enthesis was created after 96 h culturing. The results showed that the microstructure gradient influenced the cell morphology, tissue topology, and promoted enthesis formation. This study demonstrates a heterogeneous nanofiber scaffold strategy for interfacial tissue regeneration. It provides a potential solution for mimicking transitional interface between distinct tissues, and can be further developed as a heterogeneous cellular composition platform to facilitate the formation of multi-tissue complex systems.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1849-5435 1849-5435
DOI:	10.1177/1849543518803538