In situ chondrogenic differentiation of human adipose tissue-derived stem cells in a TGF-β1 loaded fibrin-poly(lactide-caprolactone) nanoparticulate complex

Title
In situ chondrogenic differentiation of human adipose tissue-derived stem cells in a TGF-β1 loaded fibrin-poly(lactide-caprolactone) nanoparticulate complex
Authors
정영미정용일김상희태기융김영하이종원김상헌김수현
Keywords
Human adipose tissue-derived stem cells; Chondrogenic differentiation; TGF-β1; Poly(L-lactide-co-ε-caprolactone) scaffold
Issue Date
2009-09
Publisher
Biomaterials
Citation
VOL 30, NO 27, 4657-4664
Abstract
When conducting cartilage tissue engineering with stem cells, it is well known that chemical and physical stimulations are very important for the induction and maintenance of chondrogenesis. In this study, we induced chondrogenic differentiation of human adipose tissue-derived stem cells (hASCs) in situ by effective stimulation via the continuous controlled release of TGF-b1 from a heparin-functionalized nanoparticle–fibrin–poly(lactide-co-caprolactone) (PLCL) complex. PLCL scaffolds were fabricated with 85% porosity and 300–500 mm pore size by a gel-pressing method. Heparin-functionalized nanoparticles were prepared by a solvent-diffusion method, composed of poly(lactide-co-glycolide) (PLGA), Pluronic F-127, and heparin, and then TGF-b1 was loaded to the nanoparticles. A mixture of hASCs, fibrin gels and TGF-b1 loaded nanoparticles was then seeded onto PLCL scaffolds and cultured in vitro, after which they were subcutaneously implanted into nude mice for up to five weeks. The results of in vitro and in vivo studies revealed that chondrogenic differentiation of the hASCs on the complex was induced and sustained by continuous stimulation by TGF-b1 from the heparin-functionalized nanoparticles. In addition, there was no significant difference between the predifferentiation condition prior to incubation in chondrogenic medium and the proliferation condition, which suggests that in situ chondrogenic differentiation of hASCs was induced by the TGF-b1 loaded nanoparticles. Consequently, the hybridization of fibrin and PLCL scaffolds for three-dimensional spatial organization of cells and the effective delivery of TGF-b1 using heparin-functionalized nanoparticles can induce hASCs to differentiate to a chondrogenic lineage and maintain their phenotypes.
URI
http://pubs.kist.re.kr/handle/201004/35792
ISSN
0142-9612
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