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Updated: Jun 27, 2026
10:43
High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
Published on: November 5, 2016
Metallothionein-Inspired Dual-Stage Ion-Regulatory Coatings With Infection-Triggered Bactericidal Activity and
Jinghua Zhao1,2,3, Yongjin Hu1,2, Yirixiatijiang Amier1,4
1Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|June 26, 2026
Summary
This study introduces a novel biomaterial coating that adapts its defense mechanisms over time. It effectively combats early infections and prevents later biofilm formation in implantable devices.
Area of Science:
- Biomaterials Science
- Materials Chemistry
- Infectious Disease Research
Background:
- Implantable stent failure is often due to static coatings unable to adapt to changing risks like infection and biofilm-mineral occlusion.
- Metallothioneins inspire a dynamic approach to metal homeostasis for adaptive biomaterial design.
Purpose of the Study:
- To develop a time-programmable ion-regulatory network for adaptive biomaterials.
- To transform conventional metal bactericides into stage-adaptive defense factors using a novel coating.
Main Methods:
- A β-hydroxy thioether-based ion-regulatory network was designed with competing binding sites.
- Silver ions were used as a model to demonstrate stage-adaptive ion release and function.
- The system's performance was validated in methicillin-resistant Staphylococcus aureus-infected wound and bladder indwelling models.
Main Results:
- The coating exhibits initial labile hydroxyl complexation for rapid silver ion release and bacterial clearance under acidic conditions.
- Over time, the system shifts to thermodynamically favored thioether coordination, repelling bacteria and excluding minerals at sub-bactericidal levels.
- Stage-adaptive protection was successfully validated in preclinical models.
Conclusions:
- Time-programmable ion regulation is an effective design concept for adaptive biomaterials.
- This approach allows materials to cope with evolving biological environments, addressing long-term implant failure.
- The developed biomaterial demonstrates potential for enhanced implant performance and longevity.
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