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Published on: October 7, 2016
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PEG-based hydrogels prepared by catalyst-free thiol-yne addition and their post-antibacterial modification
Xiao Yan Cai1, Jun Zhi Li1, Ning Ning Li1
1Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715 P.R. China. xulq@swu.edu.cn.
Biomaterials Science
|October 7, 2016
Summary
New PEG-based hydrogels were created using thiol-yne chemistry. These antimicrobial peptide-embedded hydrogels effectively inhibit bacterial growth while remaining non-toxic to cells.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Tissue Engineering
Background:
- Polyethylene glycol (PEG)-based hydrogels offer desirable properties like elasticity, permeability, and biocompatibility.
- Functionalization of hydrogels is crucial for advanced applications, including drug delivery and tissue regeneration.
Purpose of the Study:
- To synthesize PEG-based hydrogels using nucleophilic thiol-yne addition.
- To functionalize the hydrogels with a fluorescent dye and an antimicrobial peptide (AMP).
- To evaluate the antimicrobial efficacy and cytotoxicity of the modified hydrogels.
Main Methods:
- Hydrogel fabrication via nucleophilic thiol-yne addition between PEG10k-4-SH and PEG10k-4-PP.
- Post-fabrication functionalization with a thiol-containing fluorescent dye.
- Embedding of an antimicrobial peptide (AMP-SH) via thiol-yne addition.
- Assessment of bacterial growth inhibition in suspension and on surfaces.
- Cytotoxicity evaluation using MTT assay on 3T3 fibroblasts.
Main Results:
- Successfully synthesized PEG-based hydrogels with residual functionalities.
- Demonstrated successful conjugation of a fluorescent dye and embedding of AMP-SH.
- AMP-embedded hydrogels showed significant inhibition of bacterial growth.
- Unmodified and AMP-embedded hydrogels exhibited low cytotoxicity towards 3T3 fibroblasts.
Conclusions:
- PEG-based hydrogels can be effectively synthesized and functionalized using thiol-yne click chemistry.
- The resulting hydrogels possess antimicrobial properties without compromising cytocompatibility.
- These functionalized hydrogels hold promise for applications requiring antimicrobial and biocompatible materials.
