Vesicles Functionalized with a CO-Releasing Molecule for Light-Induced CO Delivery

Area of Science:

• Biochemistry
• Materials Science
• Nanotechnology

Background:

• Carbon monoxide (CO) has therapeutic potential but requires controlled delivery methods.
• Developing safe and efficient CO delivery systems for biological applications is challenging.

Purpose of the Study:

• To introduce a novel methodology for photoinduced carbon monoxide (CO) release using amphiphilic manganese carbonyl complexes.
• To encapsulate these complexes within lipid vesicles for enhanced biocompatibility and controlled release.

Main Methods:

• Synthesis of an amphiphilic manganese carbonyl complex (1.Mn).
• Incorporation of 1.Mn into 1,2-distearoyl-sn-glycero-3-phosphocholine lipid vesicles (Ves-1.Mn).
• Photoinduced CO release studies using 365 nm light, confirmed by myoglobin assay and infrared spectroscopy.

Main Results:

• Vesicles (Ves-1.Mn) demonstrated gradual CO release over 50 minutes with a half-time of 26.5 minutes upon light exposure.
• The CO-releasing capability was successfully validated through myoglobin assay and infrared analysis.
• The developed vesicles exhibit biocompatibility, water solubility, and provide steady, slow CO release.

Conclusions:

• Lipid vesicles serve as effective nanocarriers for water-insoluble photoinduced CO donors.
• This methodology offers a rational approach for controlled CO delivery in aqueous biological systems.
• The biocompatible Ves-1.Mn system presents a promising platform for CO-based therapeutics.