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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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Cationic drug-based self-assembled polyelectrolyte complex micelles: Physicochemical, pharmacokinetic, and anticancer
Thiruganesh Ramasamy1, Bijay Kumar Poudel1, Himabindu Ruttala1
1College of Pharmacy, Yeungnam University, 214-1 Dae-dong, Gyeongsan 712-749, South Korea.
Colloids and Surfaces. B, Biointerfaces
|June 20, 2016
Summary
Drug-loaded polymeric micelles demonstrate enhanced pharmacokinetic stability and antitumor potential. Interactions between cationic drugs doxorubicin (DOX) and mitoxantrone (MTX) and poly(ethylene oxide)-block-poly(acrylic acid) influence delivery system performance.
Area of Science:
- Polymer Chemistry
- Nanotechnology
- Drug Delivery Systems
Background:
- Self-assembly of ionic block copolymers and small molecules offers a novel route for formulating drug delivery systems.
- Understanding drug-polymer interactions is crucial for optimizing nanocarrier performance.
- Polymeric micelles show promise for improving drug stability and efficacy.
Purpose of the Study:
- To investigate the interactions between cationic drugs doxorubicin (DOX) and mitoxantrone (MTX) and the anionic polymer poly(ethylene oxide)-block-poly(acrylic acid) (PEO-b-PAA).
- To evaluate the influence of these interactions on the pharmacokinetic stability and antitumor potential of formulated polyelectrolyte complex micelles (PCM).
- To compare the performance of DOX-PCM and MTX-PCM in preclinical cancer models.
Main Methods:
- Preparation of individual DOX-loaded and MTX-loaded polyelectrolyte complex micelles (PCM).
- Characterization of physicochemical properties and pH-responsive release profiles.
- In vitro evaluation of cellular uptake and apoptosis induction in A-549 cancer cells.
- In vivo pharmacokinetic studies and tumor growth suppression assessments in animal models.
Main Results:
- DOX-PCM and MTX-PCM exhibited distinct pH-responsive release profiles; MTX-PCM showed monophasic release, while DOX-PCM displayed biphasic release.
- DOX-PCM demonstrated higher cellular uptake and induced greater cancer cell apoptosis compared to MTX-PCM.
- Both formulations achieved prolonged blood circulation, with MTX-PCM showing a 4-fold increase in AUC(0-t) for MTX and DOX-PCM a 3-fold increase for DOX.
- Both MTX-PCM and DOX-PCM effectively suppressed tumor growth, comparable to their free drug counterparts.
Conclusions:
- The nature of drug-polymer interactions significantly impacts the biological performance of polymeric micelle delivery systems.
- PEGylated polymeric micelles are effective delivery systems for both DOX and MTX, enhancing their pharmacokinetic profiles and antitumor activity.
- Further research into drug-polymer interactions can optimize nanocarrier design for improved therapeutic outcomes.
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