Here, we designed chimeric peptides to capture exosomes and modify Ti surfaces by connecting CP05 with minTBP-1 directly (P1) or connecting the two through a flexible linker (P2). Ti surfaces modified by the designed chimeric peptides (Ti-P1/P2 ) were hypothesized to capture more exosomes than immobilized exosomes non-specifically (Ti-EX). The present work demonstrated that chimeric peptides could firmly bind to Ti surfaces, capture exosomes, enhance the loading rate and improve the slow release of exosomes. Furthermore, Ti surface with P2 and exosomes (Ti-P2-EX) promoted the wound healing more efficiently than did Ti surface with P1 and exosomes (Ti-P1-EX) in vivo.This difference is ascribed to the chimeric peptide with linker extending the swing range of CP05 and facilitating the binding between this peptide fragment and exosomes, thus influence cell behavior such as migration and proliferation through a related signaling pathway.
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