Engineering delivery platforms for controlled nitric oxide release

Area of Science:

• Biomedical Engineering
• Materials Science
• Pharmacology

Background:

• Nitric oxide (NO) is a crucial signaling molecule with therapeutic potential in various fields.
• Clinical use of NO is limited by poor solubility, rapid degradation, and lack of controlled release.
• Existing NO donors have distinct advantages and limitations.

Purpose of the Study:

• To review recent advances in nitric oxide (NO) donor chemistry and delivery systems.
• To classify NO donors into unstable and stable categories.
• To highlight the integration of NO donor chemistry with materials design for enhanced therapeutic delivery.

Main Methods:

• Classification of NO donors into unstable (e.g., N-diazeniumdiolates, S-nitrosothiols, SIN-1) and stable (e.g., O2-protected diazeniumdiolates, protected SIN-1, nitrobenzene derivatives, BNN6) types.
• Review of advanced delivery platforms including nanoparticles, hydrogels, xerogels, liposomes, and inorganic materials.
• Analysis of stimuli-triggered NO release mechanisms and tissue-specific targeting strategies.

Main Results:

• Development of diverse NO donors with varying release characteristics.
• Engineering of delivery platforms enabling precise, stimuli-triggered NO release.
• Demonstration of improved stability and tissue-specific targeting for NO delivery systems.

Conclusions:

• Integration of NO donor chemistry with materials science offers significant potential for controlled NO-based therapies.
• Advanced delivery platforms can overcome physicochemical limitations of NO.
• Further research is needed to translate these NO delivery systems into clinical applications.