Abstract
This study focuses on the development of injectable hydrogels to mimic the cartilage microenvironment using hyaluronic acid (HA) derivatives as starting materials. Cysteine-inserted Tobacco mosaic virus (TMV) mutants (TMV1cys) could be cross-linked to methacrylated hyaluronic acid (MeHA) polymers by thiol-ene "click" chemistry and form hydrogels under physiological condition. The resulting hydrogels could promote in vitro chondrogenesis of bone marrow mesenchymal stem cells (BMSCs) significantly higher than that in the TMV-free HA hydrogels by upregulating bone morphogenetic protein-2 (BMP-2) expression and enhancing collagen accumulation.
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