Please use this identifier to cite or link to this item:
|Title:||Vascular Endothelial Growth Factor and Fibroblast Growth Factor-2 Incorporation in Starch-Based Bone Tissue-Engineered Constructs Promote the In Vivo Expression of Neovascularization Mediators|
|Author(s):||Santos, T. C.|
Morton, Tatjana J.
Marques, A. P.
Castro, António G.
Reis, R. L.
Griensven, Martijn van
|Publisher:||Mary Ann Liebert Inc.|
|Journal:||Tissue Engineering, Part A|
|Abstract(s):||The ideal bone tissue-engineered (TE) construct remains to be found, although daily discoveries significantly contribute to improvements in the field and certainly have valuable long-term outcomes. In this work, different TE elements, aiming at bone TE applications, were assembled and its effect on the expression of several vas- cularization/angiogenesis mediators analyzed. Starch/polycaprolactone (SPCL) scaffolds, obtained by two different methodologies, were combined with fibrin sealant (Baxter), human adipose-derived stem cells (hASCs), and growth factors (vascular endothelial growth factor [VEGF] or fibroblast growth factor-2 [FGF-2]), and implanted in vascular endothelial growth factor receptor-2 (VEGFR2)-luc transgenic mice. The expression of VEGFR2 along the implantation of the designed constructs was followed using a luminescence device (XenogenÒ) and after 2 weeks, the explants were retrieved to perform histological analysis and reverse transcriptase–polymerase chain reaction for vascularization (VEGF and VEGFR1) and inflammatory (tumor necrosis factor-alpha, interleukin-4, and interferon-gamma) markers. It was showed that SPCL scaffolds ob- tained by wet spinning and by fiber bonding constitute an adequate support for hASCs. The assembled TE constructs composed by fibrin sealant, hASCs, VEGF, and FGF-2 induce only a mild inflammatory reaction after 2 weeks of implantation. Additionally, the release of VEGF and FGF-2 from the constructs enhanced the ex- pression of VEGFR2 and other important mediators in neovascularization (VEGF and VEGFR1). These results indicate the potential of VEGF or FGF-2 within a bone TE construct composed by wet-spun SPCL, fibrin sealant, and hASCs in promoting the vascularization of newly formed tissue.|
|Appears in Collections:||3B’s - Artigos em revistas/Papers in scientific journals|
Files in This Item:
|15905-VEGF and FGF-2 incorporation in starch-based bone TE constructs promote in vivo expression of neovascularization mediaotrs_TE_2013.pdf||800,71 kB||Adobe PDF||View/Open|