Tuning the Structure-Functional Properties Within Peptide-Mimicking Antimicrobial Hydrogels.
Samuel T Attard1, Vina R Aldilla1, Rajesh Kuppusamy1,2
1School of Chemistry, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia.
Antibiotics (Basel, Switzerland)
|November 27, 2025
Summary
Novel antimicrobial hydrogels combat resistance. Researchers synthesized peptide-mimics, finding specific structural features enhance hydrogel properties and potent antimicrobial activity for treating bacterial infections.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Medicinal Chemistry
Background:
- Increasing antimicrobial resistance necessitates the development of novel antimicrobial agents.
- Antimicrobial hydrogels show promise for treating bacterial infections.
Purpose of the Study:
- To investigate the structure-property relationships of amphiphilic antimicrobial peptide-mimics.
- To understand how structural features influence hydrogelation and antimicrobial efficacy.
Main Methods:
- Synthesis of eleven novel peptide-mimicking anthranilamides.
- Characterization of hydrogelation properties using rheology and atomic force microscopy (AFM).
- Evaluation of antimicrobial activity via minimum inhibitory concentration (MIC) assays.
Main Results:
- Three synthesized compounds formed hydrogels, with tunable mechanical strength, secondary structure, and fiber morphology.
- Alterations to the aromatic cap or amino acid side chain impacted hydrogel properties.
- Specific structural features were identified that decrease hydrogelation strength and stiffness.
Conclusions:
- Insights into how structural features of low-molecular-weight self-assembling hydrogels correlate with physical and antimicrobial properties.
- Provides a rational framework for optimizing hydrogel properties and identifying features that may hinder hydrogelation.
