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Multifunctional Antimicrobial Biometallohydrogels Based on Amino Acid Coordinated Self-Assembly
Jingwen Song1,2, Chengqian Yuan2, Tifeng Jiao1
1State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|January 30, 2020
Summary
New antimicrobial hydrogels combat drug-resistant bacteria. These biofriendly materials offer tunable strength and localized delivery, showing broad-spectrum effectiveness against Gram-negative and Gram-positive bacteria in cells and mice.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Infectious Diseases
Background:
- Growing threat of multidrug-resistant (MDR) bacteria necessitates novel antimicrobial strategies.
- Broad-spectrum antimicrobial hydrogels offer a promising avenue for combating evolving microbial resistance.
- Existing options are limited, highlighting the need for innovative solutions.
Purpose of the Study:
- To develop and characterize novel broad-spectrum antimicrobial biometallohydrogels.
- To investigate the mechanism of action and efficacy of these hydrogels against resistant bacteria.
- To explore their potential for localized delivery and tunable mechanical properties in biomedical applications.
Main Methods:
- Synthesis of biometallohydrogels via self-assembly and local mineralization of Ag+-coordinated Fmoc-amino acids.
- Evaluation of antibacterial activity against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria.
- Assessment of hydrogel properties including mechanical strength, drug release kinetics, and interaction with bacterial cell walls and membranes.
- In vitro and in vivo testing in cells and mice models.
Main Results:
- Successfully fabricated broad-spectrum antimicrobial biometallohydrogels with tunable mechanical strength.
- Demonstrated localized delivery and sustained release of antimicrobial agents, reducing dosage and toxicity.
- Observed direct interaction with bacterial cell walls and membranes, leading to plasma membrane detachment and cytoplasmic leakage.
- Achieved significant antibacterial effects against both E. coli and S. aureus in vitro and in vivo.
Conclusions:
- Biometallohydrogels based on self-assembled amino acids and silver ions present a viable strategy against multidrug-resistant bacteria.
- These materials offer advantages in localized delivery, tunable mechanics, and reduced toxicity for enhanced bioavailability and prolonged effect.
- The study establishes a platform for developing advanced biomaterials for diverse biomedical applications through simple biomolecule coordination and self-assembly.
