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  • Title: Physically crosslinked silk fibroin/hyaluronic acid scaffolds.
    Author: Guan Y, You H, Cai J, Zhang Q, Yan S, You R.
    Journal: Carbohydr Polym; 2020 Jul 01; 239():116232. PubMed ID: 32414432.
    Abstract:
    Combining the properties of natural protein and polysaccharide is a promising strategy to generate bioactive biomaterials with controlled structure. Here, a new method of preparing water-insoluble silk fibroin/hyaluronic acid (SF/HA) scaffolds with tunable performances using an all-aqueous process is reported. Freezing-induced assembly was used to form silk I crystallization in the SF/HA blends. Silk I crystallization enhanced the stability of SF/HA scaffolds in water by forming silk I crystal networks to entrap blended HA without chemical cross-linking. Increasing HA content significantly enhanced the flexibility and water binding capacity of porous scaffolds, but high amount of HA reduced the water-stability of porous scaffolds due to insufficient silk I crystal cross-links. The enzymatic degradation behavior of the SF/HA scaffolds was investigated, revealing that the regulation ability of HA in the SF scaffolds. This novel nonchemically cross-linked protein/polysaccharide scaffold may be useful for soft tissue engineering due to excellent biocompatibility and tunable performances.
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