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Journal Article
Research Support, Non-U.S. Gov't
Hyaluronic Acid Coating Enhances Biocompatibility of Nonwoven PGA Scaffold and Cartilage Formation.
Tissue Engineering. Part C, Methods 2017 Februrary
Synthetic polymers such as polyglycolic acid (PGA) fibers are the traditional tissue engineering scaffolds that are widely used for engineering a variety of soft tissues. However, the major disadvantage of this polymer material is its released acidic degradation products that trigger inflammatory response and fibrotic process, which affects the biocompatibility and the quality of the engineered tissues. In this study, the effect of hyaluronic acid (HA) coating on improving PGA biocompatibility was explored. The results showed that 1% HA solution could better coat PGA fibers than other tested concentrations of HA, and coated PGA exhibited less inflammatory reaction upon in vivo subcutaneous implantation. In vitro characterization demonstrated that HA coating could enhance cell adhesion to the scaffold and reduce gene expression of IL-1, IL-6, IL-8, and α-SMA. It also decreased the acidity of degradation products in vitro. Furthermore, coated PGA could engineer better cartilages in vitro with higher content of total collagen and glycosaminoglycan, as well as higher gene expression levels of collagen II, aggrecan, and Sox9. Collectively, the data indicate that HA coating can significantly enhance the biocompatibility of this traditional scaffold material, which also enhances the quality of engineered tissues.
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