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Antimicrobial Cellobiose Dehydrogenase-Chitosan Particles.
Gregor Tegl1, Barbara Thallinger1, Bianca Beer1
1Institute of Environmental Biotechnology, BOKU-University of Natural Resources and Life Sciences , Vienna, Konrad Lorenz Straße 20, 3430 Tulln an der Donau, Austria.
ACS Applied Materials & Interfaces
|December 18, 2015
Summary
A new antimicrobial system uses immobilized cellobiose dehydrogenase (CDH) on chitosan (CTS) particles to release hydrogen peroxide (H2O2). This system effectively inhibits bacterial growth, offering a novel strategy for chronic wound infection treatment.
Area of Science:
- Biotechnology
- Materials Science
- Infectious Diseases
Background:
- Chronic wounds and microbial infections pose significant health challenges.
- Rising multidrug resistance complicates infection treatment.
- Novel antimicrobial strategies are urgently needed.
Purpose of the Study:
- To develop a novel antimicrobial system for in situ hydrogen peroxide (H2O2) generation.
- To immobilize cellobiose dehydrogenase (CDH) on chitosan (CTS) particles for sustained H2O2 release.
- To evaluate the antimicrobial efficacy of the CDH-CTS system against common wound pathogens.
Main Methods:
- Cellobiose dehydrogenase (CDH) was immobilized on chitosan (CTS) particles using covalent (carbodiimide coupling) and noncovalent methods.
- Protein loading and enzyme activity recovery were quantified for both immobilization techniques.
- The antimicrobial activity of H2O2 generated in situ by CDH-CTS was tested against Escherichia coli and Staphylococcus aureus over 24 hours.
Main Results:
- Covalent immobilization achieved higher CDH loading (104 μg CDH/mg CTS) compared to noncovalent methods.
- Noncovalent immobilization resulted in the highest recovery of CDH activity (0.01 U/mg CTS).
- The CDH-CTS system effectively inhibited the growth of both E. coli and S. aureus within 24 hours.
Conclusions:
- The developed CDH-CTS system efficiently generates H2O2 in situ, demonstrating potent antimicrobial activity.
- This resilient system offers a promising strategy for preventing and treating chronic wound infections.
- The findings highlight the potential of immobilized enzymes on chitosan for combating multidrug-resistant microbial colonization.
