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Microwave-assisted Functionalization of Poly(ethylene glycol) and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation
Published on: October 29, 2013
Interactions between homopolypeptides and lightly cross-linked microgels.
Helena Bysell1, Martin Malmsten
1Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 9, 2008
Summary
Electrostatic interactions are key in peptide-microgel systems, driving peptide binding and microgel deswelling. Differences in peptide structure and charge density influence these interactions, affecting peptide conformation and distribution within gels.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Physical Chemistry
Background:
- Peptide-microgel interactions are crucial for developing advanced biomaterials.
- Understanding the forces governing these interactions is essential for controlling material properties.
Purpose of the Study:
- To investigate the relative importance of electrostatic and nonelectrostatic interactions in peptide-microgel systems.
- To examine how peptide charge and structure influence microgel deswelling and peptide distribution.
Main Methods:
- Micromanipulator-assisted light microscopy
- Confocal microscopy
- Circular dichroism spectroscopy
Main Results:
- Negatively charged and uncharged polypeptides showed no binding to anionic microgels.
- Positively charged polypeptides strongly interacted with anionic microgels, causing significant deswelling.
- Anionic polypeptides exhibited higher binding to cationic microgels compared to cationic and uncharged ones.
- Despite similar binding amounts, different cationic peptides induced varying degrees of microgel deswelling and conformational changes.
Conclusions:
- Electrostatic interactions predominantly dictate peptide binding and microgel deswelling.
- Peptide charge density and structural differences significantly modulate interactions and subsequent effects.
- These findings provide insights into designing peptide-microgel systems with tailored properties.
