A Peptide-Based Material for Therapeutic Carbon Monoxide Delivery

Area of Science:

• Biomaterials Science
• Drug Delivery
• Cardiovascular Research

Background:

• Carbon monoxide (CO) exhibits therapeutic potential but lacks effective delivery systems.
• Existing CO donors have limitations in controlled and sustained release.
• Peptide amphiphiles offer self-assembly properties for biomaterial development.

Purpose of the Study:

• To develop the first self-assembled nanofiber gel for therapeutic carbon monoxide (CO) delivery.
• To investigate the CO release kinetics of the novel material.
• To evaluate the therapeutic efficacy of the CO-releasing gel in a cardiac cell model.

Main Methods:

• Synthesis of a peptide amphiphile with a covalently attached ruthenium tricarbonyl complex.
• Formation of self-assembled nanofiber gels from the peptide amphiphile.
• Assessment of CO release kinetics compared to soluble CO donors.
• Treatment of oxidatively stressed cardiomyocytes with the CO-releasing gel.

Main Results:

• The peptide amphiphile successfully formed self-assembled nanofiber gels.
• The gels exhibited spontaneous and prolonged CO release.
• Treatment with the CO-releasing gel significantly improved the viability of stressed cardiomyocytes.
• The material demonstrated potential as a biodegradable, localized CO therapeutic delivery system.

Conclusions:

• A novel peptide amphiphile gel enables sustained, localized therapeutic delivery of carbon monoxide.
• This biodegradable material offers a promising new strategy for treating conditions like cardiac stress.
• The findings pave the way for advanced biomaterials in targeted CO-based therapies.