In vitro and in vivo wound healing-promoting activities of phosvitin-derived peptide Pt5-1c

Antimicrobial peptide-ZIF8 embedded silk protein-lysozyme composite films: A promising multifunctional solution for infected bone regeneration

Bacterial infections as well as delayed osseointegration have always been clinical challenges for titanium-based orthopedic implants, and effective solutions are urgently needed. In this study, we cleverly utilized silk protein and lysozyme (SF-Lys) nanofilms as carriers, and coated metal-organic frameworks (ZIF8@P) encapsulated with antimicrobial peptides (P) onto titanium surfaces to construct a pH-responsive SF-Lys/ZIF8@P multifunctional coating. The coating demonstrated good biosafety, hemocompatibility, corrosion resistance, and hydrophilicity. Based on the synergistic effect of P with Zn2+, its inhibition rate of both E. coli and S. aureus reached >90 %. The coating was able to effectively induce RAW264.7 to M2-type polarization and remodel the anti-inflammatory microenvironment. In addition, the coating induced endothelial cell migration as well as lumen formation, accelerating the vascularization of HUVEC. Specifically, the coating was able to effectively differentiate MC3T3-E1 into osteoblasts by further stimulating the production of genes and proteins linked to osteogenesis. More importantly, the coating demonstrated excellent antibacterial, anti-inflammatory, vascularization and bone repair capabilities in animal models, which comprehensively solved the key problems faced by titanium implants in practical applications. In conclusion, the SF-Lys/ZIF8@P coating provides a comprehensive and promising solution for infected bone repair, with significant clinical prospects.

A Systematic Review of the Design and Applications of Antimicrobial Peptides in Wound Healing

The sources of antimicrobial peptides (AMPs), also known as peptide-based antibiotics, are diverse, such as plants, animals, microorganisms including human leukocytes, saliva, human defense peptides, and human sweat. These natural sources provide a rich variety of AMPs with unique characteristics and potential therapeutic applications, including wound-healing and antimicrobial properties. AMPs derived from these sources have shown promise in combating a wide range of pathogens, making them valuable targets for further research and potential clinical applications. The design of AMPs for wound healing involves a meticulous process of structurally optimizing peptides to possess a unique combination of antibacterial and wound-healing characteristics. This systematic review was produced to show the design and applications of AMPs in wound healing. The terms "antimicrobial peptides AND wound healing" were used to search for articles published between September 2023 and January 2010. In the search, we found a total of 12958 articles, of which 12898 were excluded, and the remaining 60 articles were chosen for further study. This systematic review underscores the potential of AMPs as valuable tools in infection control and wound healing, showcasing their versatility and effectiveness in combating a wide range of pathogens. Overall, AMPs in wound healing display a diverse mechanism of action, influencing the inflammatory response, encouraging tissue regeneration, and aiding tissue remodeling, along with strong antibacterial activity. Furthermore, this systematic review addresses AMP toxicity studies, which include rigorous in vitro and in vivo examinations to determine potential cytotoxic effects, systemic toxicity, and any adverse responses connected with its usage in wound-healing applications.