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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
Published on: October 10, 2016
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Degradable ketal-based block copolymer nanoparticles for anticancer drug delivery: a systematic evaluation
Benoit Louage1, Qilu Zhang, Nane Vanparijs
1Department of Pharmaceutics, Ghent University , Ottergemsesteenweg 460, 9000 Ghent, Belgium.
Biomacromolecules
|December 10, 2014
Summary
New amphiphilic block copolymers effectively encapsulate hydrophobic anticancer drugs. These stimuli-responsive nanocarriers show promising in vitro efficacy and cellular uptake, offering a potential solution for drug delivery challenges.
Area of Science:
- Polymer Chemistry
- Materials Science
- Nanotechnology
Background:
- Poor solubility of potent anticancer drugs hinders effective delivery.
- Stimuli-responsive nanocarriers offer a promising strategy for drug delivery.
- Amphiphilic block copolymers are versatile platforms for nanocarrier development.
Purpose of the Study:
- To synthesize and characterize novel block copolymers for stimuli-responsive nanocarrier formation.
- To investigate the influence of polymer composition on self-assembly and drug loading.
- To evaluate the in vitro performance, including cellular uptake and anticancer efficacy, of the developed nanocarriers.
Main Methods:
- Sequential reversible addition-fragmentation chain transfer (RAFT) polymerization was used to synthesize block copolymers of 2-hydroxyethyl acrylate (HEA) and (2,2-dimethyl-1,3-dioxolane-4-yl)methyl acrylate (DMDMA).
- Physicochemical properties, including self-assembly, particle size, and colloidal stability, were assessed under varying conditions.
- In vitro studies involved cellular uptake assays (flow cytometry, confocal microscopy) and cytotoxicity assessments with paclitaxel (PTX) loaded nanoparticles.
Main Results:
- Block copolymers with >11 mol % DMDMA content self-assembled into stable nanoparticles in aqueous media.
- Nanoparticle size ranged from 23 to 338 nm and was proportional to DMDMA content.
- Acidic conditions triggered nanoparticle decomposition, with rates inversely proportional to DMDMA content.
- Effective, dose-dependent cellular uptake of R18-loaded nanoparticles was observed.
- PTX-loaded nanocarriers demonstrated comparable or superior in vitro anticancer efficacy to commercial formulations.
Conclusions:
- Novel HEA-DMDMA block copolymers form stable, stimuli-responsive nanocarriers for hydrophobic drugs.
- The DMDMA content critically influences self-assembly, stability, and acid-triggered release.
- These nanocarriers exhibit excellent in vitro cellular uptake and potent anticancer activity, highlighting their therapeutic potential.
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