Abstract
Keratinocyte growth factor (KGF) has been demonstrated to specifically stimulate the multiplication and migration of keratinocytes. However, due to rapid degradation, the results of topical application of growth factors on wounds are unsatisfactory. In this study, we cross-linked KGF to the surface of gold nanoparticles (GNPs) and explored their effects on wound healing. The as-synthesized nanocomposite (KGF-GNPs) displayed good colloidal stability, decent biocompatibility as well as negligible cellular cytotoxicity. The in vitro cellular experimental results demonstrated that KGF-GNPs could effectively promote the proliferation of keratinocytes in contrast to bare GNPs or KGF. Furthermore, in animal full-thickness wound model, KGF-GNPs are more conducive to wound healing than bare GNPs or KGF. KGF-GNPs enhanced wound healing by promoting wound re-epithelialization rather than granulation. The superior biocompatibility, colloidal depressiveness and biological activity of this nanocomposite indicate that it could be utilized as a promising wound healing drug for clinical application in the future.
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