Probing the Complex Loading-Dependent Structural Changes in Ultrahigh Drug-Loaded Polymer Micelles by Small-Angle
Benedikt Sochor1, Özgür Düdükcü1, Michael M Lübtow2
1Chair of X-Ray Microscopy, Department of Physics and Astronomy, University Würzburg, Campus Hubland Nord, Josef-Martin-Weg 63, 97074 Würzburg, Germany.
Langmuir : the ACS Journal of Surfaces and Colloids
|March 24, 2020
Summary
This study reveals polymer micelle structure changes with curcumin loading. At higher loadings, the micelle corona incorporates curcumin, impacting drug delivery systems.
Area of Science:
- Nanomedicine
- Polymer Chemistry
- Materials Science
Background:
- Polymer micelles are explored for drug delivery, typically assuming a core-shell structure.
- The drug is usually confined to the core, with the corona providing stability.
- Interactions between drugs and the micellar corona are gaining research interest.
Purpose of the Study:
- To investigate polymer micelle morphology changes with increasing drug loading.
- To understand the influence of drug incorporation into the micellar corona.
- To explore structure-property relationships in drug-loaded polymer micelles.
Main Methods:
- Small-angle neutron scattering (SANS) was used to study micelle morphology.
- Curcumin was used as a model drug compound.
- Structurally similar polymer micelles with varying curcumin loadings were analyzed.
Main Results:
- At low curcumin loading, the drug predominantly resides in the micelle core.
- At higher loadings, SANS data indicates the formation of an inner shell, suggesting drug incorporation into the corona.
- The outer shell primarily consists of water and polymer.
Conclusions:
- The inner morphology of polymer micelles is crucial for drug loading efficiency.
- The hydrophilic block's impact on micelle structure is a key parameter for optimizing drug delivery systems.
- Understanding these structure-property relationships can lead to improved nanomedicine formulations.
