A catalytically active and recyclable bioelastomer inspired by metalloenzymes

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Catalysis

Background:

• Biological systems extensively utilize catalysis, but synthetic biomaterials rarely incorporate this fundamental activity.
• Enzyme-mimetic materials offer potential for advanced functionalities in biomedical applications.

Purpose of the Study:

• To design and synthesize a novel polymeric elastomer with enzyme-mimetic catalytic activity.
• To evaluate the material's nitric oxide generation, antioxidant properties, biocompatibility, and recyclability.

Main Methods:

• Construction of an imidazole-functionalized polymer network crosslinked with Cu2+ ions.
• Assessment of nitric oxide generation and antioxidant activity against reactive oxygen species.
• Evaluation of biocompatibility through hemolysis and platelet adhesion assays, and subcutaneous implantation.
• Recyclability testing via immersion in acetic acid.

Main Results:

• The resulting elastomer exhibited sustained nitric oxide generation and broad-spectrum antioxidant activity, mimicking key enzyme functions.
• Catalytic activity was directly linked to Cu2+ coordination, confirming a defined structure-function relationship.
• The material showed minimal hemolysis, reduced platelet adhesion, and high biocompatibility.
• The elastomer was fully recyclable through a simple acid treatment without loss of structural integrity.

Conclusions:

• This study presents a new class of catalytically active, biocompatible, and fully recyclable biomaterials.
• The developed elastomer bridges the gap between natural enzymatic functions and synthetic materials.
• This work establishes a framework for designing sustainable, enzyme-mimetic biomaterials for diverse applications.