Time filter

Source Type

Zheng L.,Stomatology Hospital of Jilin UniversityJilin Province | Wang L.,Stomatology Hospital of Jilin UniversityJilin Province | Qin J.,Stomatology Hospital of Jilin UniversityJilin Province | Sun X.,Stomatology Hospital of Jilin UniversityJilin Province | And 3 more authors.
Journal of Hard Tissue Biology

The temperature-sensitive triblock copolymer poly-(D, L-lactic acid-co-glycolic acid) (PLGA)- polyethylene glycol (PEG)-PLGA (PLGA-PEG-PLGA) is an FDA-approved material that has the ability to provide a sustained release of drugs and/or proteins. Platelet-rich fibrin(PRF)is second generation platelet concentration that contains growth factors such as transforming growth factor- 1 (TGF- 1), platelet derived growth factor-AB (PDGF-AB), and insulin-like growth factor-I (IGF-I). These growth factors affect the migration and proliferation of diverse cell types, including endothelial cells, smooth muscle cells, and osteoblast-like cells. This study sought to combine the hydrogel into scaffolds in order to serve as a sustained release system for PRF-derived growth factors. Poly (lactic-co-glycolic) acid (PLGA) and nano-hydroxyapatite (nHA) were used to prepare the hydrogel-containing scaffolds with the PRF-derived growth factors. We then investigated the effects of the hydrogel on modulating the activity of osteoblasts in vitro. We indicated that the hydrogel (Gel) was well-distributed in the inner surface of scaffolds, which themselves exhibited relatively interconnected pores with uniform sizes. The addition of the hydrogel didn’t affect their inherently high porosity. In vitro release tests indicated that the system containing nHA/PLGA/Gel/PRF provided for a slow and sustained release of PRF-derived growth factors. The results from our in vitro studies indicated that the MG63 cells cultured with both scaffold media extracts did not appear to have cytotoxic responses, and the nHA/PLGA/Gel/PRF system could improve the adhesion and proliferation of MG63 cells when compared to controls (p < 0.05). This in vitro evaluation suggests that the hydrogel-scaffold system is suitable as a model for bone tissue engineering, and that it allows for the sustained release of growth factors to improve bone reconstruction. © 2015 The Hard Tissue Biology Network Association Printed in Japan, All rights reserved. Source

Discover hidden collaborations