Exploiting thermoresponsive polymers to modulate lipophilicity: interactions with model membranes
Yussif Saaka1, Robert C Deller, Alison Rodger
1Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK.
Macromolecular Rapid Communications
|March 16, 2012
Summary
Responsive polymers, poly[oligo(ethyleneglycol)methacrylate]s (POEGMA), can transition between aqueous and organic phases above their lower critical solution temperature (LCST). This property allows them to interact with and potentially insert into cell membranes, aiding drug delivery applications.
Area of Science:
- Polymer Science
- Materials Science
- Biotechnology
Background:
- Poly[oligo(ethyleneglycol)methacrylate]s (POEGMA) exhibit tunable properties based on temperature.
- Understanding polymer-membrane interactions is crucial for advanced drug delivery systems.
Purpose of the Study:
- To investigate the behavior of POEGMA polymers above their lower critical solution temperature (LCST).
- To explore the potential of POEGMA for interacting with and perturbing cell membranes for drug delivery applications.
Main Methods:
- Dynamic light scattering to assess vesicle fusion.
- Fluorescence-based assays to monitor membrane integrity.
- Membrane perturbation assays.
- Linear dichroism spectroscopy to study polymer-membrane interactions.
Main Results:
- POEGMA polymers undergo a phase transition above their LCST, shifting from aqueous to organic partitioning.
- LCST transition promoted fusion of phospholipid vesicles without causing lysis.
- Evidence suggests POEGMA interacts with or inserts into membranes above their transition temperature.
Conclusions:
- POEGMA's temperature-responsive phase transition facilitates interaction with cell membranes.
- These findings support the development of POEGMA-based responsive polymers for targeted drug delivery systems.
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