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Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
Published on: August 28, 2015
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Novel polymeric micelles for drug delivery: Material characterization and formulation screening
Christine Janas1, Zouhair Mostaphaoui1, Ludwig Schmiederer2
1Goethe University, Institute of Pharmaceutical Technology, D-60438 Frankfurt, Germany.
International Journal of Pharmaceutics
|May 29, 2016
Summary
Researchers developed a method to screen block copolymers (BP) for creating polymeric micelles. Two formulations, BP006 and BP007, showed optimal micellar integrity and modified drug release, enhancing delivery of poorly soluble drugs.
Area of Science:
- Polymer Chemistry
- Materials Science
- Pharmaceutical Sciences
Background:
- Many new drug candidates have poor aqueous solubility, hindering their therapeutic use.
- Polymeric micelles offer a promising nanocarrier system for delivering lipophilic drugs.
Purpose of the Study:
- To establish a rational screening procedure for novel block copolymers (BP) for drug delivery.
- To investigate the relationship between polymer structure, micelle formation, and drug binding.
- To identify optimal polymeric micelle formulations for enhanced drug delivery.
Main Methods:
- Synthesis of seven block copolymers (BP001-BP007) with varying monomer compositions.
- Characterization of polymers using H(1)-NMR and SEC (molecular weight 13-37kDa).
- Determination of critical micelle concentration, micellar integrity in human plasma, and dexamethasone loading.
- Analysis of micelle size (49.21-236.37nm), morphology, and surface charge.
Main Results:
- Five copolymers demonstrated an 11h half-life in human plasma.
- BP006 and BP007 exhibited optimal in vitro micellar integrity and modified release profiles.
- Strongest drug-polymer interactions were observed with BP006 and BP007, containing benzyl and carboxylic groups.
Conclusions:
- A robust screening method for block copolymers in drug delivery was established.
- BP006 and BP007 represent promising nanocarrier formulations for improved drug delivery of lipophilic compounds.
- Understanding polymer structure-property relationships is crucial for designing effective polymeric micelles.
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