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Accession Number:
ADA616544
Title:
Platelet-derived Growth-factor-releasing Aligned Collagen-nanoparticle Fibers Promote the Proliferation and Tenogenic Differentiation of Adipose-derived Stem Cells
Descriptive Note:
Journal article
Corporate Author:
ARMY INST OF SURGICAL RESEARCH FORT SAM HOUSTON TX
Report Date:
2013-11-27
Pagination or Media Count:
11.0
Abstract:
In order to enhance the healing potential of an injured tendon, we have prepared a novel biomimetic aligned collagen nanoparticle NP composite fiber using an electrochemical process. The aligned collagen NP composite fiber is designed to affect the cellular activity of adipose-derived stem cells ADSCs through two different ways i topographic cues from the alignment of collagen fibril and ii controlled release of platelet-derived growth factors PDGFs from the NPs. PDGF released from collagen NP fibers significantly enhanced the proliferation of ADSCs when tested for up to 7 days. Moreover, compared to random collagen fibers with PDGFs, aligned collagen NP fibers significantly promoted the desirable tenogenic differentiation of ADSCs, as evidenced by an increased level of tendon markers such as tenomodulin and scleraxis. On the other hand, no undesirable osteogenic differentiation, as measured by the unchanged level of alkaline phosphatase and osteocalcin, was observed. Together, these results indicate that the aligned collagen NP composite fiber induced the tenogenic differentiation of ADSCs through both a topographic cue aligned collagen fibril and a chemical cue PDGF released from NPs. Thus, our novel aligned collagen NP composite fiber has a significant potential to be used for tendon tissue engineering and regeneration.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
