Development of wound dressing materials based on silk fibroin and transgenic silk fibroin with Arg‐Gly‐Asp motifs

In this paper, wound dressing materials made of silk fibroin (SF) and transgenic SF with Arg‐Gly‐Asp motifs (TG‐RGD SF) were developed. Initially, an animal evaluation experiment with mice to demonstrate the usefulness of SF film as a wound dressing was performed. The amorphous SF film was shown to promote the formation of granulation tissue and neovessels in the dermis, leading to skin regeneration. As a result, amorphous SF film is suitable for use as a wound dressing materials. Then, the SF‐ Human umbilical vein endothelial cells signaling pathway was determined by cell proliferation assay with pharmacological inhibitors. Subsequently, a mice evaluation experiment to assess the promotion of healing effects using TG‐RGD SF was conducted and the results were compared with those obtained using SF. In the wound area evaluation and the quantitative evaluation of granulation tissue formation, the TG‐RGD SF film promoted dermis regeneration more than the SF film. Wound healing process of Bombyx mori silk fibroin and RGD sequence.