Plant-inspired gallolamine catalytic surface chemistry for engineering an efficient nitric oxide generating coating

Area of Science:

• Biomaterials Engineering
• Surface Chemistry
• Catalysis

Background:

• Developing stable, adjustable nitric oxide (NO)-generating coatings is crucial for blood-contacting devices.
• Existing methods for NO generation often involve complex, multi-step processes with limited immobilization capacity.
• Glutathione peroxidase (GPx)-like compounds are used for NO generation, but their surface immobilization is challenging.

Purpose of the Study:

• To develop a facile, versatile, and material-independent strategy for creating NO-generating coatings.
• To engineer surfaces with long-term, stable, and controllable NO release for biomedical applications.
• To improve the anti-thrombotic properties of materials through surface modification.

Main Methods:

• A novel gallolamine surface chemistry was developed using plant polyphenol (gallic acid) and a GPx-like organoselenium compound (cystamine or selenocystamine).
• A one-step phenol-amine molecular assembling process was employed for surface functionalization.
• The NO-generating coatings were characterized for their release kinetics and biocompatibility.

Main Results:

• The gallolamine coating demonstrated long-term, steady, and controllable nitric oxide (NO) release rates.
• The one-step process avoided complex synthesis and toxic chemical leakage, resulting in a histocompatible and biocompatible coating.
• The engineered surfaces significantly improved anti-thrombogenicity in vivo.

Conclusions:

• The developed plant-inspired gallolamine surface chemistry provides an unprecedentedly simple and effective platform for NO-generating coatings.
• This material-independent approach expands the application of surface chemistry in interfacial catalysis and antithrombotic materials.
• The NO-generating coatings offer a promising new avenue for enhancing the performance of blood-contacting materials and devices.