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Updated: Jun 5, 2025
07:32
Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
Published on: August 28, 2015
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Harnessing Dual-Responsive Polymeric Micelles for Precision Oxidative Stress Amplification in Targeted Cancer Therapy
Manseok Yang1, Sujin Kim1, Seungwon Jeong1
1Department of Bionanotechnology and Bioconvergence Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Korea.
Biomacromolecules
|December 9, 2024
Summary
This study introduces novel polymeric micelles that generate reactive oxygen species (ROS) and deplete glutathione (GSH) to selectively kill cancer cells. Targeted delivery enhances efficacy and reduces toxicity in preclinical models.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Oncology
Background:
- Cancer cells exhibit altered redox balance, making them susceptible to oxidative stress.
- Targeting this imbalance offers a strategy for selective cancer therapy.
Purpose of the Study:
- To develop a novel therapeutic strategy combining reactive oxygen species (ROS) generation and glutathione (GSH) depletion for selective cancer cell death.
- To create oxidative stress-amplifying polymeric (pCB) micelles for targeted drug delivery and enhanced anticancer efficacy.
Main Methods:
- Development of pCB micelles encapsulating a ROS-generating agent and a GSH-depleting retinoic acid prodrug (BRDP).
- Surface functionalization of micelles with Arg-Gly-Asp (RGD) peptide for targeted delivery to tumors overexpressing integrins.
- Evaluation of micelle accumulation, anticancer efficacy, and toxicity in a mouse xenograft model.
Main Results:
- pCB micelles successfully encapsulated and delivered both ROS generators and GSH-depleting drugs.
- RGD-decorated micelles showed significant accumulation in tumor sites.
- Enhanced anticancer efficacy was observed in vivo with no apparent toxicity to normal tissues.
Conclusions:
- The developed oxidative stress-amplifying polymeric micelles represent a novel and effective anticancer therapeutic approach.
- Integration of multiple tumor-specific triggers and ROS-mediated mechanisms offers a promising strategy for cancer treatment.
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