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Antimicrobial poly(2-methyloxazoline)s with bioswitchable activity through satellite group modification
Christian Krumm1, Simon Harmuth, Montasser Hijazi
1Biomaterials and Polymer Science, Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Strasse 66, 44227 Dortmund (Germany).
Angewandte Chemie (International Ed. in English)
|March 7, 2014
Summary
This study introduces a novel bioswitchable antimicrobial polymer. By cleaving a satellite group, its potent antimicrobial activity against Gram-positive bacteria can be reversibly controlled, offering a safer alternative to traditional biocides.
Area of Science:
- Polymer Chemistry
- Antimicrobial Materials
- Biotechnology
Background:
- Biocides are essential for controlling microbial infections and material fouling.
- However, widespread biocide use leads to resistance and environmental concerns.
- Developing novel, controllable antimicrobial agents is crucial.
Purpose of the Study:
- To demonstrate a concept for a deactivated antimicrobial polymer via satellite group cleavage.
- To synthesize and evaluate a novel polymer with a cleavable ester satellite group.
- To confirm the bioswitchable nature of the antimicrobial activity.
Main Methods:
- Synthesis of a biocidal polymer using a poly(2-methyloxazoline) backbone and a quaternary ammonium group linked via an ester satellite.
- Antimicrobial activity testing against Gram-positive bacterial strains.
- Hemotoxicity assessment and calculation of HC50/MIC values.
- Enzymatic cleavage of the ester satellite group using lipase.
Main Results:
- The synthesized polymer exhibited significant antimicrobial activity against Gram-positive bacteria.
- The polymer demonstrated low hemotoxicity with a high HC50/MIC value of 120 for S. aureus.
- Cleavage of the ester satellite group reduced antimicrobial activity by 30-fold.
- Lipase successfully cleaved the satellite group, confirming bioswitchability.
Conclusions:
- The satellite group approach effectively controls antimicrobial polymer activity.
- The developed polymer is a promising candidate for bioswitchable antimicrobial applications.
- This strategy offers a pathway to reduce environmental impact and combat biocide resistance.
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